EA039593B1 - Injection molded screening apparatus, method for fabricating same and method for screening - Google Patents

Abstract

Screening members, screening assemblies, methods for fabricating screening members and screening assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. The use of injection molded screening members provides, inter alia, for varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Some embodiments of the invention use a thermoplastic injection molded material.

Description

This application claims priority under U.S. Provisional Applications No. 61/652,039, filed May 25, 2012, and U.S. Provisional Applications No. 61/714,882, filed October 17, 2012.

Technical field

The present invention relates to the field of screening materials. More specifically, the present invention relates to screening modules, sieve assemblies, methods for making screening modules and sieve assemblies, and methods for screening materials.

State of the art

Screening of materials involves the use of vibrating screening machines. Vibrating screening machines provide the ability to excite the installed sieve to achieve the required degree of separation of the materials placed on the sieve. Large materials are separated from small materials. Over time, screens wear out and need to be replaced. Therefore, the sieves are made with the possibility of replacement.

Replacement screen assemblies must be securely fastened to the vibrating screen machines and are subjected to high vibration forces. Replaceable screen assemblies can be secured to vibrating screeners by means of tensioning devices, compressing devices, or clamping devices.

Replaceable screen assemblies are usually made of metal or thermosetting polymer. The material and design of the screens to be replaced depends on the screening application. For example, due to the relative reliability and fine screening capability of metal screens, they are often used for wet materials in the oil and gas industry. However, conventional thermoset polymer type screens (eg, molded polyurethane screens) are not as reliable and would not likely withstand harsh wet material applications and are often used for dry materials, such as in the mining industry.

The fabrication process for thermosetting polymer type screens is complex, time consuming and error prone. Typical thermosetting polymer type screens used on vibrating screeners are made by mixing separate chemically reactive liquids (eg polyester, polyester and hardener) and then curing the mixture in a mold for some time. When making sieves with fine openings, for example from about 43 to 100 µm, this process can be particularly difficult and time consuming. Indeed, in order to make holes in the sieve, the channels in the molds through which the liquid passes must be very small (for example, on the order of 43 microns), and very often the liquid does not enter all the voids in the mold. As a consequence, complex procedures are often implemented requiring close attention to pressures and temperatures. Since single sieves are large enough (eg two feet by three feet or more) to be made in the mold, a single defect (eg a hole, i.e. a place where liquid has not entered) will spoil the entire sieve. Thermosetting polymer screens are typically made by molding the whole screen assembly structure as a single large screen, the screen assembly may have openings ranging from about 43 microns to about 4000 microns. The screening surface of existing thermosetting polymer screens typically has a uniform flat configuration.

Thermosetting polymer screens are relatively flexible and are often attached to vibrating screeners using tensioners that pull the side faces of the thermosetting polymer screen apart and attach the bottom surface of the thermosetting polymer screen to the surface of the vibrating screener. To prevent deformation under tension, thermoset polymer assemblies can be formed with aramid fibers laid in the direction of tension (see, for example, US Pat. No. 4,819,809). When subjected to a compressive force on the side faces of a typical thermoset screen, it would buckle or wrinkle, thus rendering the screening surface relatively inefficient.

Unlike thermosetting polymer screens, metal screens are stiffer and can be compressed or stretched on a vibrating screen machine. Metal sieve assemblies are often made from several metal components. The production of metal sieve assemblies usually includes: the production of screening material, often a three-layer woven wire mesh; production of a metal support frame with a hole; and the connection of the screening material with a metal support frame with holes. The layers of wire cloth can be finely woven with holes ranging in size from about 30 microns to about 4000 microns. In general, the screening surface of existing metal assemblies typically has a relatively uniform flat configuration or a relatively uniform corrugated configuration.

Critical to screening performance of screen assemblies (thermosetting polymer assemblies and metal type assemblies) for shaker screens are the size of the openings in the screening surface, the structural stability and wear resistance of the screening surface, the structural stability of the overall device, the chemical properties of the device components, and the ability of the device to operate. at different temperatures and under different conditions. Among the disadvantages of existing metal assemblies are insufficient structural stability and wear resistance of the screening surface formed from layers of woven wire mesh, clogging (clogging of the sieve holes with particles) of the screening surface, the mass of the overall structure, time and costs associated with the manufacture or purchase of each of component parts, and the time and cost of assembly. Because wire cloth is often purchased by screen manufacturers from outside sources, usually weaving mills or wholesalers, quality control can be very difficult and wire cloth is often problematic. Defective wire cloth can lead to screen performance problems, so constant monitoring and control is necessary.

One of the main problems with existing metal assemblies is clogging. In a new metal sieve, the area of open holes can initially be quite large, but over time, as the sieve is exposed to particles, the sieve holes become clogged (i.e. clogged) and the area of open holes, and, as a result, the efficiency of the sieve itself, decreases quite quickly. For example, a 140 mesh per square inch screen assembly (having three layers of screen fabric) may initially have an open opening area of 20-24% of the total area. However, when using a sieve, the area of open holes can be reduced by 50% or more.

Existing metal sieve assemblies are also reduced in open hole area due to their design, which includes adhesives, support frames, plastic sheets holding wire cloth layers together, and the like.

Another significant disadvantage of existing metal assemblies is the fragility of the sieves. Existing metal assemblies usually fail not due to wear but due to fatigue. That is, the wires of the woven wire mesh typically break off due to being subjected to an up and down motion during vibration loading.

The disadvantages of existing screens made of thermosetting polymer are also insufficient structural stability and wear resistance. Also disadvantages are the inability to withstand compressive force and the inability to withstand high temperatures (for example, usually thermosetting polymer sieves begin to fail or experience performance problems at temperatures above 130 degrees Fahrenheit, which is especially true for sieves with thin holes, for example, from about 43 µm to about 100 µm). In addition, as mentioned above, the manufacturing process of this type of sieves is quite complex, time-consuming and error-prone. Moreover, the molds used to make thermosetting polymer screens are expensive, and any defect or slightest damage to them leads to deterioration of the entire mold and requires its replacement, which causes costly downtime in the production process.

Another disadvantage of both metal screens and thermosetting polymer screens is the limited number of available screening surface configurations. Existing screening surfaces are made with openings of relatively constant dimensions over the entire area and a relatively uniform surface configuration over the entire area, regardless of whether the screening surface is flat or convex.

The conventional polymer type screens referred to in U.S. Provisional Application No. 61/652039 (also referred to in this application as conventional polymer screens, existing polymer screens, exemplary polymer screens, or simply polymer screens) refers to the conventional thermoset polymer screens described in the preliminary U.S. Patent Application No. 61/714882 and the conventional thermoset polymer screens described herein (also referred to in this application and in US provisional application No. 61/714882 as traditional thermoset polymer screens, existing thermoset polymer screens, typical thermoset polymer screens or simply screens made of thermosetting polymer). Accordingly, the conventional polymer type screens referred to in U.S. Provisional Application No. 61/652,039 are the same conventional polymer type screens referred to in this application and U.S. Provisional Application No. 61/714,882 and can be made with very small screen openings. size (as described here and in U.S. Provisional Application No. 61/714882), but have all the disadvantages (as described here and in U.S. Provisional Application No. 61/714882) associated with conventional thermosetting polymer screens, including insufficient design stability and wear resistance, failure to withstand compressive force, failure to withstand high temperatures, and complex, time-consuming and error-prone manufacturing methods.

There is a need for versatile and improved screening modules, screen assemblies, methods for manufacturing screening modules and screen assemblies, and methods for screening materials for vibrating screening machines, involving the use of injection molded materials (for example, thermoplastics) with improved mechanical and chemical properties.

The essence of the invention

The present invention is an improvement on existing sieve assemblies and methods for screening and manufacturing sieve assemblies and parts thereof. The present invention offers highly versatile and improved

- 2 039593 sieving modules, sieve assemblies, methods for manufacturing screening modules and sieve assemblies and methods for sifting materials for vibrating screening machines, involving the use of injection molded materials with improved properties, including mechanical and chemical properties. In some embodiments of the present invention, a thermoplastic is used as the injection molded material. The present invention is not limited to the use of injection molded thermoplastic materials, and other materials having similar mechanical and/or chemical properties may be used in embodiments of the present invention. In embodiments of the present invention, multiple injection molded screening modules are securely attached to the lattice structures. The gratings are connected together and form a sieve assembly structure having a screening surface containing a plurality of screening modules. The use of injection molded screen modules in the various embodiments described herein provides, among other things, a variety of screen surface configurations; fast and relatively simple production of the sieve assembly; and a combination of excellent mechanical, chemical and electrical properties of the sieve assembly, including stiffness, chemical and wear resistance.

Among the embodiments of the present invention are screen assemblies having a design with a relatively large open screening area, with structural stability of small screen openings required for fine vibratory screening. In some embodiments of the present invention, the sieve openings are very small (e.g., reaching approximately 43 microns), and the sieving modules are quite large (e.g., one inch by one inch, one inch by two inches, two inches by three inches, etc. ) for easy assembly of the finished screening surface of the sieve assembly (eg two feet by three feet, three feet by four feet, etc.). Making small screen openings for fine screening requires injection molding of very small structural elements that actually form the screen openings. These structural elements are molded by injection molding as a whole with the design of the screening module. It is important that the structural elements are small enough (e.g., in some applications they may be on the order of 43 microns in the direction of the screening surface) to provide an effective total open screening area and form a sufficiently large overall design of the screening module (for example, two inches by three inches) for ease of assembly of a relatively large finished screening surface (for example, two feet by three feet).

In one embodiment of the present invention, the screening modules are made of an injection molded thermoplastic material. In the past, thermoplastics have not been used to make vibrating screens with fine openings (e.g., from about 43 µm to about 1000 µm) because it has been very difficult, if not impossible, to injection mold the thermoplastic into a single relatively large vibrating screen structure having fine openings, and obtain the open screening area required for competitive performance in vibratory screening applications.

In accordance with an embodiment of the present invention, a screen assembly is provided that is: structurally stable and can be subjected to various stresses, including compression, tension, and pinching; can withstand strong vibration impact; contains a plurality of injection molded screening modules which, due to their relatively small size, can be made with very small openings (size reaching approximately 43 microns); eliminates the need for wire cloth; easy; recyclable; simple and easy to assemble; can be manufactured in a variety of different configurations, including different screen area sizes of screen openings and various configurations of screening surfaces, for example, various combinations of flat and wavy sections; and can be made using specialized materials and nanomaterials. In addition, each screen assembly can be tailored to a particular application and can be simply and easily manufactured with different opening sizes and configurations, depending on the specifications provided by the end customer. Embodiments of the present invention can be used in a variety of applications, including wet and dry materials, and can be applied in various industries. The present invention is not limited to the oil and gas and mining industries, it can be applied to any industry where separation of materials using vibrating screening machines is necessary, including pulp and paper, chemical pharmaceuticals and others.

In an exemplary embodiment of the present invention, a sieve assembly is provided that significantly improves screening of materials using an injection molded thermoplastic screening module. Several injection molded thermoplastic screening modules are securely attached to the grid structures. The gratings are connected together and form a sieve assembly structure having a screening surface containing a plurality of screening modules. Each screening module and each grid can have a different shape and configuration. Injection molding of individual screening modules made of thermo

- 3 039593 layer allows you to accurately make the holes of the sieve, having small dimensions, reaching approximately 43 microns. The lattice frame may be sufficiently rigid and may be resistant to damage or deformation from the significant vibration loads to which it is subjected when attached to the vibrating screen machine. In addition, when assembled into a complete screen assembly, the gratings are strong enough not only to withstand vibration loading, but also to withstand the forces required to secure the screen assembly to the vibrating screen machine, including high compressive forces, tensile forces and/or clamping forces. . In addition, screening modules are structurally supported on the holes in the grids, and vibration from the vibrating screen machine is transmitted through these holes to the elements that form the screening holes, thus optimizing screening efficiency. Screening modules, grids and/or any other component of the sieve assembly may contain nanomaterials and/or glass fibers, which, in addition to other advantages, impart strength and wear resistance.

According to an embodiment of the present invention, there is provided a screen assembly in which a screening module having a screening surface of a screening module with a set of screen holes and a screen having a plurality of elongated structural members form a screen frame with screen holes. The screening module covers at least one opening of the grate and is attached to the upper surface of the grate. A plurality of individual grids are fastened together and form a sieve assembly, and the sieve assembly has a continuous screening surface of the sieve assembly with a plurality of screening surfaces of the screening modules. The screening module contains essentially parallel end segments and essentially parallel side segments, essentially perpendicular to the end segments. The screening module also includes a first screening module reference segment and a second screening module reference segment orthogonal to the first screening module reference segment. The first support segment of the screening module extends between the end segments and approximately parallel to the side segments. The second support segment of the screening module extends between the side sections and approximately parallel to the end segments. The screening module contains a first series of amplifiers substantially parallel to the side segments and a second series of amplifiers substantially parallel to the end segments. The sieving surface of the sieving module contains elements of the sieve surface that form the sieve openings. The end segments, the side segments, the first and second support segments, and the first and second reinforcement sequences structurally stabilize the screen surface and screen openings. The screening module is injection molded from thermoplastic as a single piece.

The sieve openings can be rectangular, square, round, and oval, or any other shape. The screen surface elements may extend parallel to the end segments and form screen openings. The screen surface elements may also extend perpendicular to the end segments and form screen openings. Various combinations of rectangular, square, round and oval screen openings (or other shapes) may be present simultaneously and, depending on the shape used, may be parallel and/or perpendicular to the end segments.

The screen surface elements may be arranged parallel to the end segments and may be elongated portions forming the screen openings. The sieve openings may be elongated slits with a distance between the inner surfaces of adjacent sieve surface elements from about 43 microns to about 4000 microns. In some embodiments, the sieve openings may have a distance between the inner surfaces of adjacent sieve surface elements from about 70 microns to about 180 microns. In other embodiments, the sieve openings may have a distance between the inner surfaces of adjacent sieve surface elements from about 43 microns to about 106 microns. In embodiments of the present invention, the sieve openings may have a width and a length, wherein the width may be from about 0.043 mm to about 4 mm and the length may be from about 0.086 mm to about 43 mm. In some embodiments, the ratio of width to length may be from about 1:2 to about 1:1000.

Several gratings of different sizes can be combined and can form the support structure of the screen assembly for screening modules. Alternatively, the grid may be wholly injection molded from a thermoplastic, or otherwise formed, and form the entire support structure of the screen assembly for the plurality of screen modules.

In embodiments using multiple grids, the first grid may comprise a first base with a first fastener engaging with a second fastener of a second base of the second grid, the first and second fasteners securing the first and second grids together. The first fastener may be a latch and the second fastener may be a latch slot, wherein the latch engages in the latch slot and securely secures the first and second grating together.

The first and second support segments of the screening module and the end segments of the screening module may contain a fastening device provided for connection with the fastening

- 4 039593 grate attachment. The grating fixture may include elongated fasteners, and the screening module fixture may include mounting slots that engage the elongated fasteners to securely attach the screening module to the grate. Parts of the elongated fasteners can be made to pass through the mounting slots of the screening module and protrude slightly above the screening surface of the screening module. Mounting slots may have a taper bore or just a slot without tapering. The part of the elongated fasteners protruding above the screening surface of the screening module can be melted and can fill the conical bore, attaching the screening module to the grid. Alternatively, a portion of the elongated fasteners passing through and above the slot in the screening surface of the screening module can be melted so that it forms a tide on the screening surface of the screening module and attaches the screening module to the grid.

The elongated structural elements may comprise substantially parallel lattice end elements and substantially parallel lattice side elements substantially perpendicular to the lattice end elements. The elongated structural elements may also comprise a first lattice support element and a second lattice support element orthogonal to the first lattice support element. The first support element of the grid may extend between the end elements of the grid and may be approximately parallel to the side elements of the grid. The second support element of the grid may extend between the side elements of the grid and may be approximately parallel to the end elements of the grid and substantially perpendicular to the end elements.

The lattice frame may comprise first and second lattice frames defining the first and second lattice openings. The screening modules may comprise first and second screening modules. The lattice may contain a comb and a base. The first and second lattice frames may comprise first and second sloped surfaces extending up to the crest and extending downward from the top to the base. The first and second screening modules may overlap the first and second inclined surfaces, respectively.

According to an embodiment of the present invention, there is provided a screen assembly in which a screening module having a screening module screening surface with a series of screen holes and a screen having a plurality of elongated structural members form a screen frame with screen holes. The screening module covers at least one opening of the grate and is attached to the upper surface of the grate. A plurality of grid elements are fastened together and form a sieve assembly, and the sieve assembly has a continuous screening surface of the sieve assembly containing a plurality of screening surfaces of screening modules. The sieving module is a single piece made of thermoplastic injection molding.

The screening module may comprise substantially parallel end portions and substantially parallel side segments substantially perpendicular to the end segments. The screening module may also comprise a first screening module reference segment and a second screening module reference segment orthogonal to the first screening module reference segment. The first support segment of the screening module may extend between the end segments and may be approximately parallel to the side segments. The second support segment of the screening module may extend between the side segments and may be approximately parallel to the end segments. The screening module may comprise a first series of amplifiers substantially parallel to the side segments and a second series of amplifiers substantially parallel to the end segments. The screening module may comprise elongated screen surface elements extending parallel to the end segments and forming screen openings. The end segments, the side segments, the first and second support segments, the first and second reinforcement sequences structurally stabilize the screen surface and screen openings.

The first and second reinforcement strings may be less than the thickness of the end segments, the side segments, and the first and second support segments. The end segments and side segments and the first and second support segments of the screen modules may form four rectangular regions. The first amplifier sequence and the second amplifier sequence may form a plurality of rectangular support arrays within each of the four rectangular regions. The sieve openings may have a width between the inner surfaces of each sieve surface elements from about 43 microns to about 4000 microns. In some embodiments, the sieve openings may have a width between the inner surfaces of each sieve surface features from about 70 microns to about 180 microns. In other embodiments, the sieve openings may have a width between the inner surfaces of each sieve surface features from about 43 microns to about 106 microns. In embodiments of the present invention, the sieve openings may have a width of from about 0.043 mm to about 4 mm, and a length of from about 0.086 mm to about 43 mm. In some embodiments, the ratio of width to length may be from about 1:2 to about 1:1000.

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Screening modules can be flexible.

The end elements of the lattice, the side elements of the lattice, and the first and second support elements of the lattice may form eight rectangular openings of the lattice. The first sieving module may cover four of the grate openings, and the second sieving module may cover the other four openings.

The central part of the screening surface of the screening module may bend slightly when a load is applied. The lattice may be substantially rigid. The grille may also be a single piece injection molded from a thermoplastic. At least one of the grille end members and the grille side members may comprise fasteners designed to engage with other grille member fasteners, which fasteners may be latches and latch slots that snap into place and securely fasten the grille together.

The grid may comprise substantially parallel triangular end elements, triangular middle elements substantially parallel to the triangular end elements, first and second middle support elements substantially perpendicular to the triangular end elements and extending between the triangular end elements, first and second bases, substantially perpendicular to the triangular end members and extending between the triangular end members, and a central ridge substantially perpendicular to the triangular end members and extending between the triangular end members. The first faces of the triangular end elements, the triangular middle elements, and the first middle support element, the first base, and the central ridge may form a first lattice top surface having a first set of lattice openings. The second faces of the triangular end elements, the triangular middle elements, and the second middle support element, the second base, and the central ridge may form a second upper grille surface having a second set of grille openings. The first top surface may slope down from the central ridge to the first base, and the second top surface may slope down from the central ridge to the second base. The first and second screening modules may overlap the first and second sets of grid openings, respectively. The first faces of the triangular end elements, the triangular middle elements, the first middle supporting element, the first base and the central ridge may contain the first grating fixture provided for reliable connection with the first fixture of the first screening module. The second faces of the triangular end elements, the triangular middle elements, the second middle support element, the second base and the central ridge may comprise a second grating fixture provided for reliable connection with the second fixture of the second screening module. The first and second grid fasteners may comprise elongated fasteners, and the first and second screening module fasteners may comprise fastening slots that engage the elongated fasteners to securely attach the first and second screening modules to the first and second grid, respectively. Part of the elongated fasteners can pass through the fastening slots of the screening module and protrude slightly above the screening surfaces of the first and second screening modules.

The first and second screening modules may comprise substantially parallel end segments and substantially parallel side segments substantially perpendicular to the end segments. The first and second screening modules may each comprise a first screening module support segment and a second screening module support segment orthogonal to the first screening module support segment, wherein the first screening module support segment extends between the end segments and is approximately parallel to the side segments, and the second screening module support segment extends between the side segments and may be approximately parallel to the end segments. The first and second screening modules may each comprise a first series of amplifiers substantially parallel to the side segments and a second series of amplifiers substantially parallel to the end segments. The first and second screening modules may each comprise elongated screen surface elements extending parallel to the end segments and forming screen openings. The end segments, the side segments, the first and second support segments, the first and second reinforcement sequences structurally stabilize the screen surface and screen openings.

One of the bases, the first or second, may include fasteners holding together a plurality of gratings, which fasteners may be latches and latch holes that snap into place and securely fasten the gratings together.

The sieve assembly may include first, second, third and fourth screening modules. The first set of grid holes may be eight holes defined by the first face of the triangular end members, the triangular middle members, the first middle support member, the first base, and the center ridge. The second set of grid holes may be eight holes formed by

- 6 039593 the second faces of the triangular end elements, the triangular middle elements, the second middle supporting element, the second base and the central ridge. The first screening module may cover four grid holes of the first set of grid holes, and the second screening module may cover the other four holes of the first set of grid holes. The third sifting module may cover four grid holes of the second set of grid holes, and the fourth screening module may cover the other four holes of the second set of grid holes. The central portions of the screen surfaces of the first, second, third and fourth screen modules may flex slightly when a load is applied. The grating can be quite rigid and be a single piece made of thermoplastic injection molding.

In accordance with an embodiment of the present invention, there is provided a sieve assembly with a sieve module having a sieve module screening surface with sieve holes and a grate comprising a sieve frame with grate holes. The screening module covers the openings of the grate and is attached to the surface of the grate. A plurality of gratings are fastened together and form a sieve assembly, and the sieve assembly has a continuous screening surface of the sieve assembly containing a plurality of screening surfaces of screening modules. The screening module is an injection molded thermoplastic part.

The sieve assembly may also comprise a first thermoplastic injection molded screening module and a second thermoplastic injection molded screening module, and the screen frame may include first and second screen frames defining the first and second screen openings. The grating may include a ridge and a base, first and second trellis frames containing first and second inclined surfaces that extend up to the ridge and extend down from the top to the base. The first and second screening modules may overlap the first and second inclined surfaces, respectively. The first and second inclined surfaces may comprise a grating fixture that is securely connected to the screen module fixture. The grating fixture may include elongated fasteners, and the screening module fixture may include slots that engage with the elongated fasteners to securely attach the screening modules to the grate.

The grating can be quite rigid and be a single piece made of thermoplastic injection molding. The base portion may include first and second fasteners that fasten the grate to third and fourth fasteners of another grate. The first and third fasteners may be latches, and the second and fourth fasteners may be latch slots. The latches can fit into the slots of the latches and securely fasten the grate to another grate.

The gratings may form a concave structure and the continuous screening surface of the sieve assembly may be concave. The gratings may form a flat structure and the continuous screening surface of the sieve assembly may be flat. The gratings may form a convex structure, and the continuous screening surface of the sieve assembly may be convex.

The sieve assembly may be designed to form, when placed in the vibrating screen machine, a predetermined concave shape when subjected to a compressive force of the compressing device of the vibrating screen machine. The predetermined concave shape can be determined according to the surface shape of the vibrating screen machine. The sieve assembly may have an interface through which the sieve assembly mates with the surface of the vibrating screen machine, which interface may be rubber, metal (e.g. steel, aluminum, etc.), composite material, plastic material, or any other suitable material. The screen assembly may have a mating surface that is consistent with the interface of the vibrating screen machine so as to guide the screen assembly to a specific position on the vibrating screen machine. The mating surface can be made on a part of at least one lattice. The mating surface of the sieve assembly may be a groove made in the corner of the sieve assembly, or a groove made approximately in the middle of the side face of the sieve assembly. The screen assembly may have a convex surface to mate with the concave surface of the vibrating screen machine. The screen assembly may be of sufficiently rigid construction that it does not substantially warp when attached to the vibrating screen machine. The sieve assembly may comprise a sieve assembly mating surface configured to form a predetermined concave shape when subjected to a compressive force by a vibrating screen compressive tool. The sieve assembly may have a mating surface shaped to match the vibrating screen machine mating surface so as to guide the sieve assembly to a predetermined position on the vibrating screen machine. The sieve assembly may include a load bar attached to the surface of the grid face of the sieve assembly, and the load bar may be designed to distribute the load over the surface of the sieve assembly. The sieve assembly may be designed to form a predetermined concave shape when subjected to the compressive force of the compressing tool of the vibrating screen machine. Sieve knot

- 7 039593 can have a concave shape, and can be made so as to deviate and form a predetermined concave shape of the waters by the compressive force of the vibrating screen machine.

From the first set of gratings, central support sub-assemblies can be formed with the first fixing device. The second set of gratings can be used to form a first end support frame subassembly with a second fixing device. The third set of gratings can be used to form a second end support frame subassembly with a third fixing device. The first, second, and third fasteners may attach the first and second end support frames to the center support subassembly. The side face surface of the first end support frame subassembly may form the first end of the screen assembly. The side face surface of the second end support frame subassembly may form the second end of the screen assembly. The end surfaces of each of the first and second support frame subassemblies and the central support frame subassembly may collectively form the first and second side surfaces of the finished screen assembly. The first and second side surfaces of the screen assembly may be substantially parallel, and the first and second end surfaces of the screen assembly may be substantially parallel and substantially perpendicular to the side surfaces of the screen assembly. The side surfaces of the sieve assembly may include fasteners adapted to engage with the connecting bar and/or the load distribution bar. The gratings may have side surfaces such that when the individual gratings are connected together to form the first and second end support frame subassemblies and the center support frame subassembly, the first and second end support frame subassemblies and the center support frame subassembly each form a concave shape. The gratings may have side surfaces such that when the individual gratings are connected together to form the first and second end support frame subassemblies and the center support frame subassembly, the first and second end support frame subassemblies and the center support frame subassembly each form a convex shape.

Screening modules can be attached to the gratings in at least one of the ways: mechanical fixture, adhesive, thermal riveting, ultrasonic welding.

According to an embodiment of the present invention, there is provided a screening module comprising a screening surface of the screening module with screen surface elements forming a set of screen openings; a pair of substantially parallel end segments; a pair of substantially parallel side segments substantially perpendicular to the end segments; the first reference segment of the screening module; a second screening module support segment orthogonal to the first screening module support segment, wherein the first screening module support segment extends between the end segments and is substantially parallel to the side segments, and the second screening module support segment extends between the side segments and is approximately parallel to the end segments and, along essentially perpendicular to the lateral segments; a first series of amplifiers substantially parallel to the side segments; and a second series of amplifiers substantially parallel to the end segments. The screen surface elements run parallel to the end segments. The end segments, the side segments, the first and second support segments, the first and second reinforcement sequences structurally stabilize the screen face and screen opening elements, and the screen module is a single thermoplastic injection molded part.

According to an embodiment of the present invention, there is provided a screening module comprising a screening surface of the screening module with screen surface elements forming a set of screen openings; a pair of substantially parallel end segments; and a pair of substantially parallel side segments substantially perpendicular to the end segments. The screening module is an injection molded thermoplastic part.

The screening module may also comprise a first screening module support segment; a second screening module support segment orthogonal to the first screening module support segment, wherein the first screening module support segment extends between the end segments and is approximately parallel to the side segments, and the second screening module support segment extends between the side segments and is approximately parallel to the end segments; a first series of amplifiers substantially parallel to the side segments; and a second series of amplifiers substantially parallel to the end segments. The screen surface elements can run parallel to the end segments. In some embodiments, the screen surface features may also extend perpendicular to the end segments. The end segments, the side segments, the first and second support segments, the first and second reinforcement sequences structurally stabilize the screen surface and screen openings.

The screening module may also have a screening module fixture integral with the screening module, which is configured to mate with the grid fixture. Several grids may form a sieve assembly, and the sieve assembly may have a continuous screening surface of the sieve assembly containing a plurality of screening surfaces of screening modules.

- 8 039593

In accordance with an embodiment of the present invention, a method for manufacturing a sieve assembly for screening materials is provided, which includes defining a specification for the sieve assembly; determination, on the basis of the terms of reference for the sieve assembly, of the requirements for the sieve openings of the sieving module, which contains the sieving surface of the sieving module with sieve openings; determination, on the basis of the technical specifications for the sieve assembly, of the sieve configuration, including the location of the screening modules in at least one of the following configurations: flat configuration and non-flat configuration; molding by injection molding screening modules of thermoplastic material; production of a grid with the possibility of supporting the screening modules, while the grid contains a grid frame with grid holes, and at least one screening module overlaps at least one grid hole and is attached to the upper surface of the grid element, and the upper surface of each grid has either a flat or not flat the surface to which the screening modules are attached; connection of screening modules with a grid; joining several grid subassemblies together to form screen end frames and screen center frames; connecting the end frames of the sieve to the central frame of the sieve to form the structure of the sieve frame; attaching the first connecting bar to the first end of the screen frame structure; and attaching a second link bar to a second end of the screen frame structure to form a screen assembly, the screen assembly having a continuous screening surface of the screen assembly comprising multiple screening surfaces of screening modules.

Screen assembly performance requirements may include dimensions, material requirements, screening open area, cut limit, and performance requirements when used for screening. A handle can be attached to the connecting bar. A tag may be affixed to the connecting bar, and the tag may contain a description of the characteristics of the sieve assembly. At least one of the screening module and the grid may be a single thermoplastic injection molded part. The thermoplastic material may contain a nanomaterial. The grid may comprise at least one base with fasteners connecting with fasteners of other bases of other grids and connecting the grids together. Fasteners can be latches and slotted latches that snap into place and securely connect the grille elements.

According to an exemplary embodiment of the present invention, there is provided a method for manufacturing a screen assembly for screening materials, which comprises injection molding screening modules from thermoplastic material, the screening module comprising a screening surface with screen openings; manufacturing a grating that serves as a support for the screening module, the grating comprising a grating frame with grating holes, and the screening module overlaps at least one grating hole; fixing the screening module on the upper surface of the grid; and joining together a plurality of grid subassemblies to form a sieve assembly, the sieve assembly having a continuous screening surface formed by the plurality of screening surfaces of the screening modules. Said method may also comprise attaching a first connecting bar to the first end of the sieve assembly and attaching a second connecting bar to the second end of the sieve assembly. The first and second connecting strips can connect the gratings to each other. The connecting strips can be configured to distribute the load along the first and second ends of the sieve assembly. The thermoplastic material may contain a nanomaterial.

In accordance with an embodiment of the present invention, a method for screening material is proposed, comprising installing a sieve assembly on a vibrating screening machine, the sieve assembly comprising a screening module with a set of screen holes forming the screening surface of the screening module, and a grate with a plurality of elongated structural elements forming a lattice frame with grill holes. Screening modules cover the openings of the grate and are attached to the upper surface of the grate. Several grids are connected together and form a sieve assembly. The sieve assembly has a continuous screening surface of the sieve assembly containing several screening surfaces of the screening modules. The sieving module is a single piece made of thermoplastic injection molding. The material is screened using a sieve assembly.

According to an embodiment of the present invention, there is provided a method for screening materials, comprising mounting a sieve assembly on a vibrating screen machine and forming a concave shape of the upper screening surface of the sieve assembly. The sieve unit contains a sieve module having a set of sieve holes forming the sieving surface of the sifting module, and a grate containing several elongated structural elements that form a sieve frame with grate holes. Screening modules cover the openings of the grate and are attached to the upper surface of the grate. A plurality of gratings are fastened together and form a sieve assembly, and the sieve assembly has a continuous screening surface of the sieve assembly containing a plurality of screening surfaces of screening modules. The sieving module is a single piece made of thermoplastic injection molding. The material is screened using a sieve assembly.

- 9 039593

The embodiments of the present invention are described in more detail below with reference to the accompanying drawings.

Brief description of the drawings

In FIG. 1 is a perspective view of a sieve assembly according to an embodiment of the present invention.

In FIG. 1A is an enlarged view of the extension of the sieve assembly shown in FIG. one.

In FIG. 1A is a perspective view of the sieve assembly shown in FIG. one.

In FIG. 2 is a top perspective view of a screening module in accordance with an exemplary embodiment of the present invention.

In FIG. 2A is a plan view of the screening module shown in FIG. 2.

In FIG. 2B is a perspective view from below of the sieve module shown in FIG. 2.

In FIG. 2C is a bottom view of the screening module shown in FIG. 2.

In FIG. 2D is an enlarged detail view of the top view of the screening module shown in FIG. 2.

In FIG. 3 is a top perspective view of an end grille in accordance with an exemplary embodiment of the present invention.

In FIG. 3A is a perspective view from below of the end grille shown in FIG. 3.

In FIG. 4 is a top perspective view of a central grill according to an embodiment of the present invention.

In FIG. 4A is a perspective view from below of the central grille shown in FIG. 4.

In FIG. 5 is a top perspective view of a connecting bar according to an embodiment of the present invention.

In FIG. 5A is a perspective view from below of the connecting strip shown in FIG. 5.

In FIG. 6 is a perspective view of a sieve subassembly in accordance with an embodiment of the present invention.

In FIG. 6A is an exploded view of the screening module shown in FIG. 6.

In FIG. 7 is a plan view of the sieve assembly shown in FIG. one.

In FIG. 7A is an enlarged sectional view along line A-A of the sieve assembly shown in FIG. 7.

In FIG. 8 is a top perspective view of a sieve assembly partially covered with screening modules, in accordance with an embodiment of the present invention.

In FIG. 9 shows the sieve assembly shown in FIG. 1, exploded view in a perspective view.

In FIG. 10 is an exploded perspective view of the end grate showing screen modules before they are attached to the end grate, in accordance with an exemplary embodiment of the present invention.

In FIG. 10A is a perspective view of the end grid shown in FIG. 10 with screening modules attached to it.

In FIG. 10B is a plan view of the end grating shown in FIG. 10A.

In FIG. 10C is a section taken along line B-B of the end grille shown in FIG. 10A.

In FIG. 11 is an exploded perspective view of the central grate showing screen modules before they are attached to the central grate, in accordance with an exemplary embodiment of the present invention.

In FIG. 11A is a perspective view of the central grille shown in FIG. 11 with screening modules attached to it.

In FIG. 12 is a perspective view of a vibrating screen machine on which screen assemblies with concave screening surfaces are mounted in accordance with an embodiment of the present invention.

In FIG. 12A is an enlarged perspective view of the exit end of the vibrating screen machine shown in FIG. 12.

In FIG. 12B is a front view of the vibrating screen machine shown in FIG. 12.

In FIG. 13 is a perspective view of a vibrating screen machine with a single screening surface, on which screen assemblies with concave screening surfaces are installed in accordance with an embodiment of the present invention.

In FIG. 13A is a front view of the vibrating screen machine shown in FIG. thirteen.

In FIG. 14 is a front view of a vibrating screener with two separate concave screen surfaces with preformed screen assemblies mounted thereon, in accordance with an embodiment of the present invention.

In FIG. 15 is a front view of a vibrating screener with a single screening surface mounted on it with a preformed sieve assembly, in accordance with an embodiment of the present invention.

In FIG. 16 is a perspective view of an end support frame subassembly in accordance with an exemplary embodiment of the present invention.

In FIG. 16A is an exploded perspective view of the end support frame subassembly shown in FIG. sixteen.

In FIG. 17 is a perspective view of a center support frame subassembly in accordance with an embodiment of the present invention.

In FIG. 17A is an exploded perspective view of the center support frame subassembly shown in FIG. 17.

In FIG. 18 is an exploded perspective view of a sieve assembly in accordance with an embodiment of the present invention.

In FIG. 19 is a top perspective view of a flat screen assembly according to an embodiment of the present invention.

In FIG. 20 is a top perspective view of a convex sieve assembly in accordance with an embodiment of the present invention.

In FIG. 21 is a perspective view of a sieve assembly with pyramid-shaped screening modules in accordance with an embodiment of the present invention.

In FIG. 21A is an enlarged view of the extension D of the sieve assembly shown in FIG. 21.

In FIG. 22 is a top perspective view of a pyramid-shaped end grate in accordance with an embodiment of the present invention.

In FIG. 22A is a perspective view from below of the pyramid-shaped end grille shown in FIG. 22.

In FIG. 23 is a top perspective view of a central element of a pyramid-shaped lattice according to an embodiment of the present invention.

In FIG. 23A is a perspective view from below of the central element of the pyramid-shaped lattice shown in FIG. 23.

In FIG. 24 is a perspective view of a pyramid-shaped subassembly in accordance with an embodiment of the present invention.

In FIG. 24A is an exploded perspective view of the pyramid-shaped subassembly shown in FIG. 24.

In FIG. 24B is an exploded perspective view of the pyramid-shaped end screen and shows the screen modules before they are attached to the pyramid-shaped end screen.

In FIG. 24C is a perspective view of the pyramid-shaped end grille shown in FIG. 24V, with screening modules attached to it.

In FIG. 24D is an exploded perspective view of the pyramidal shaped central grate and shows the screen modules before they are attached to the pyramidal shaped central grate, in accordance with an embodiment of the present invention.

In FIG. 24E is a perspective view of the pyramidal-shaped central lattice shown in FIG. 24D with screen modules attached thereto.

In FIG. 25 is a top perspective view of a pyramidal grid sieve assembly in accordance with an embodiment of the present invention.

In FIG. 25A is a C-C sectional view of the sieve assembly shown in FIG. 25.

In FIG. 25B is an enlarged sectional view taken along the C-C line of FIG. 25A.

In FIG. 26 is an exploded perspective view of a sieve assembly with pyramidal and flat shaped subassemblies in accordance with an embodiment of the present invention.

In FIG. 27 is a perspective view of a two screen vibrating screen machine, on which concave screen surfaces are mounted, with screen assemblies comprising pyramidal and flat shaped subassemblies, in accordance with an embodiment of the present invention.

In FIG. 28 is a perspective view of a sieve assembly with pyramidal and flat shaped subassemblies without screen modules, in accordance with an exemplary embodiment of the present invention.

In FIG. 29 is a top perspective view of the sieve assembly shown in FIG. 28, in which the gratings are partially covered with screening modules.

In FIG. 30 is a front view of a vibrating screen machine with two screening surfaces, on which nodes with concave screening surfaces are mounted, and the screen nodes contain pyramidal and flat grids, in accordance with an embodiment of the present invention.

In FIG. 31 is a front view of a vibrating screen machine with a single screening surface, on which a concave screening surface assembly is mounted, and the screen assembly contains pyramidal and flat shaped gratings, in accordance with an embodiment of the present invention.

In FIG. 32 is a front view of a double screen vibrating screen machine on which preformed screen assemblies with flat screen surfaces are mounted, the screen assemblies comprising pyramidal and flat screens, in accordance with an embodiment of the present invention.

In FIG. 33 is a front view of a vibrating screen machine with a single screening surface, on which a preformed screen assembly with a flat screening surface is mounted, and the screen assembly contains pyramidal and flat shaped gratings, in accordance with an embodiment of the present invention.

In FIG. 34 is a perspective view of the end grille shown in FIG. 3, to which a single screening module is partially attached, in accordance with an embodiment of the present invention.

In FIG. 35 is an enlarged view of the remote element E of the end grille shown in FIG. 34.

In FIG. 36 is a perspective view of a sieve assembly containing pyramidal gratings in accordance with an embodiment of the present invention.

In FIG. 37 is a flow chart of a screen assembly manufacturing process in accordance with an exemplary embodiment of the present invention.

In FIG. 38 is a flow chart of a screen assembly manufacturing process in accordance with an exemplary embodiment of the present invention.

In FIG. 39 is a perspective view of a vibrating screen machine with a single flat screen screen assembly mounted thereon, with part of the shaker screen omitted to better show the screen assembly in accordance with an embodiment of the present invention.

In FIG. 40 is a top perspective view of a separate sieve module in accordance with an exemplary embodiment of the present invention.

In FIG. 40A is a top perspective view of a screening module pyramid in accordance with an exemplary embodiment of the present invention.

In FIG. 40B is a plan view of four screening module pyramids of those shown in FIG. 40A.

In FIG. 40C is a top perspective view of an inverted pyramid of screen modules in accordance with an embodiment of the present invention.

In FIG. 40D is a front view of the screening module shown in FIG. 40C.

In FIG. 40E is a top perspective view of a screen module assembly in accordance with an exemplary embodiment of the present invention.

in fig. 40F is a front view of the screen module structure shown in FIG. 40E.

in fig. 41-43 are cross-sectional profiles of screening modules in accordance with embodiments of the present invention.

In FIG. 44 is a plan view of a pre-screen structure with pre-screen assemblies in accordance with an embodiment of the present invention.

In FIG. 44A is a top perspective view of the pre-screen assembly shown in FIG. 44, in accordance with an embodiment of the present invention.

Description of the invention

The same elements are designated in the drawings by the same reference numbers.

Embodiments of the present invention provide a screen assembly comprising injection molded screening modules attached to a grid. Several gratings are securely fastened to each other to form a vibrating sieve assembly having a continuous screening surface and configured to be used on a vibrating screen machine. The one-piece design of the sieve assembly is configured to withstand the harsh operating conditions it is subjected to when installed and used on a vibrating screen machine. Injection molded screening modules have many advantages in the process of making screen assemblies and when used for vibratory screening. In some embodiments of the present invention, the screening modules are injection molded using a thermoplastic material.

Embodiments of the present invention provide injection molded screening modules that are sized and configured to be suitable for making vibrating screen assemblies and when used for vibrating screening. A number of important aspects have been taken into account in determining the configuration of the individual screening modules. Screening modules are offered that are: Optimally sized (large enough for efficient assembly of pre-fabricated screen assemblies, but small enough for injection molding)

- 12 039593 (microforming in some embodiments) of very small structures that form sieve holes without allowing solidification (that is, the material solidifies in the mold until it is completely filled)); have an optimal open screening area (the structures that form the openings and serve as support for the openings are of minimum dimensions to increase the total open area used for screening, while providing, in certain implementations, very small screen openings that are necessary for the correct screening of materials in accordance with a given standard); wear-resistant and durable, can work in various temperature ranges; chemical resistant; structurally stable; amenable to very flexible production processes for sieve units; and are configurable and customizable for specific applications.

Embodiments of the present invention provide screening modules manufactured using high precision injection molding. The larger the screening module, the easier it is to assemble the finished vibrating sieve assembly. Simply put, there are fewer pieces to put together. However, the larger the size of the screening module, the more difficult the process of injection molding of very small structures, i.e. structures forming sieve openings. It is important to minimize the size of the structures that form the screen openings in order to increase the number of screen openings on the individual screen modules, and therefore optimize the open screening area of the screen modules, and, as a result, the entire screen assembly. In some embodiments of the present invention, screen modules are provided that are large enough (e.g., one inch by one inch, one inch by two inches, two inches by three inches, etc.) to conveniently assemble the finished screening surface of the screen assembly (e.g. , two feet by three feet, three feet by four feet, etc.). Relatively small sizes (e.g., one inch by one inch, one inch by three inches, two inches by three inches, etc.) are large enough when it comes to microforming very small structural elements (e.g., structural elements, dimensions which are so small that they reach 43 microns). The larger the dimensions of the entire screening module and the smaller the dimensions of the individual structural elements that form the screen openings, the more the injection molding process is prone to errors such as solidification. Therefore, the dimensions of the screening modules must be suitable for making screen assemblies, but at the same time small enough to avoid problems such as curing when microforming structures of very small sizes. The dimensions of the screening modules may vary depending on the material used in the injection molding, the required screen opening sizes and the required total open screening area.

The open screening area is the most important characteristic of vibrating sieve units. The average usable open screening area (i.e. the actual open area minus the support steel structures and adhesive materials) for conventional wire screen assemblies with 100 to 200 holes per inch can be about 16%. Certain embodiments of the present invention (eg, sieve assemblies of 100 to 200 per inch designs described herein) offer similar assortment of sieve assemblies with close actual open screening area. However, traditional sieves clog fairly quickly during operation, as a result of which the actual open screening area decreases quite quickly. It is not uncommon for traditional metal screens to become clogged within the first 24 hours of use, and their actual open screening area is often reduced by 50%. Traditional wire assemblies also often fail as a result of vibratory forces on the wires, which cause bending loading. In contrast, injection molded screen assemblies according to embodiments of the present invention do not experience heavy clogging (thus maintaining a relatively stable actual screening area) and rarely fail due to the structural stability and configuration of the screen assembly, including the screen modules and lattice structures. In fact, screen assemblies according to embodiments of the present invention have a very long service life and can last a long time under high load. Screen assemblies according to the present invention have been tested for months under severe operating conditions without failure or clogging, while traditional wire assemblies, when tested under the same conditions, clog and fail after a few days. As described more fully below, conventional thermoset type assemblies cannot be used for such tasks.

In some embodiments of the present invention, a thermoplastic is used to injection mold the screening modules. Unlike thermoset-type polymers, often containing liquid materials that chemically react and cure when exposed to temperature, the use of thermoplastics is often simpler and can be done, for example, by melting a homogeneous material (often in the form of solid granules) and then molding the molten material by injection molding . Thermoplastics not only have physical properties that are optimal for vibratory screening applications, the use of thermoplastic fluids also makes manufacturing processes easier, especially when microforming parts as described above. The use of thermoplastic materials in the present invention provides

- 13 039593 Provides excellent resistance to warping and bending and is excellent for parts subjected to high variable loads or high permanent loads often found on vibrating screens used on shaker shakers. Because vibrating screeners use motion, the low friction coefficient of thermoplastic injection molded materials provides optimum wear characteristics. Indeed, some thermoplastics are superior in wear resistance to many metals. In addition, the use of thermoplastics, as described in this application, provides an optimal material for snap connections due to its rigidity and relative elongation. The use of thermoplastics in embodiments of the present invention also provides resistance to stress cracking, aging and weathering. The heat distortion temperature of thermoplastics is about 200°F. When fiberglass is added, it increases to values from 250 to 300°F or more, and the strength increases from about 400,000 psi to over 1,000,000 psi. All these properties are optimal for the operating conditions typical for the operation of vibrating screens on vibrating screening machines.

In FIG. 1 shows a screen assembly 10 for use on vibrating screen machines. The sieve assembly 10 is shown having a plurality of screening modules 16 (see, for example, FIGS. 2 and 2A-2D) mounted on lattice structures. Lattice structures include several separate end lattice sections 14 (see, for example, Fig. 3) and several separate central lattice sections 18 (see, for example, Fig. 4) connected to each other to form a lattice frame with lattice holes 50. Each sifting module 16 covers four openings 50 of the grid. Although the sieve module 16 is shown as an assembly covering four grid holes, larger or smaller sieve modules may be represented. For example, the sieve module may be approximately one-quarter the size of the sieve module 16, and cover one grate opening 50. Alternatively, the sieve module may be approximately twice the size of the sieve module 16 and cover all eight openings of the grates 14 or 18. The grates can also be of various sizes. For example, the screen sections may have two screen openings, or one large screen may be provided for the entire structure, i.e. one screen structure for the entire screen assembly. In FIG. 1, several separate gratings 14 and 18 are joined together to form a sieve assembly 10. The sieve assembly 10 has a continuous screening surface 11 of the sieve assembly containing several screening surfaces 13 of the screening modules. Each screening module 16 is a single thermoplastic injection molded part.

In FIG. 1A is an enlarged view of a portion of a screen assembly 10 with multiple end screens 14 and center screens 18. As described below, end screens 14 and center screens 18 may be joined together to form a screen assembly. The screening modules 16 are shown attached to the end grids 14 and the center grids 18. The dimensions of the sieve assembly can be changed by attaching more or fewer grids forming the sieve assembly. When installed on a vibrating screening machine, material can be fed to the screen assembly 10 . See, for example, fig. 12, 12A, 12B, 13, 13A, 14 and 15. Material smaller than the sieve openings of the sieve module 16 passes through the sieve module 16 openings and through the grate openings 50, thus separating from material that is too large to pass through. sieve openings of screening modules 16.

In FIG. 1B shows a bottom view of the screen assembly 10 such that the screen openings 50 are visible under the screening modules. Connecting bars 12 are attached to the edges of the trellis frame. The tie bars 12 can be fixed so as to connect subassemblies together to form a trellis frame. Link bars 12 may have fasteners that connect to fasteners on the side members 38 of lattice sections 14 and 18 or fasteners on bases 64 of pyramidal lattice sections 58 and 60. Link bars 12 may be provided to increase the stability of the lattice frame and can distribute compressive load when installing the screen assembly on a vibrating screen machine using compression, for example, using the compression devices described in US patent No. 7578394 and US patent application No. 12/460200. The connecting bars may also have U-shaped elements or finger slots designed for top- or bottom-mount tension when mounted on a vibrating screen machine, as described, for example, for mounting structures in US Pat. Nos. 5,332,101 and 6,669,027. securely connected together, as described here, so that even under tension, the screening surface of the sieve assembly and the sieve assembly retain their structural integrity.

The sieve assembly shown in Fig. 1 is slightly concave, that is, the bottom and top surfaces of the sieve assembly have a slight curvature. The gratings 14 and 18 are made in such a way that when they are connected, the above specified curvature is achieved. Alternatively, the sieve assembly may be flat or convex

- 14 039593 (see, for example, Fig. 19 and 20). As shown in FIG. 12, 12A, 13 and 13A, the screen assembly 10 may be mounted on a vibrating screen machine with one or more screening surfaces. In one embodiment, the screen assembly 10 can be installed on the vibrating screen machine by positioning the screen assembly 10 on the shake screen machine such that the link bars touch the end or sides of the shake screen machine. After that, a compressive force is applied to the connecting bar 12. The connecting bars 12 distribute the compressive force over the sieve assembly. The sieve assembly 10 may be configured to bend and reshape to a predetermined concave shape by applying a compressive force to the connecting bar 12. The amount of shape change and the degree of concavity can be changed depending on the application, the applied compressive force, and the shape of the vibrating screen's installation bed. Compressing the screen assembly 10 into a concave shape when mounted on a vibrating screen machine has several advantages, such as a simple and easy installation and removal process, gripping and centering the materials to be screened, and so on. Also advantages are listed in US Pat. With large volumes of material being fed, the sieve assembly 10 can be set with greater compression, which increases the degree of concavity of the sieve assembly 10. The greater degree of concavity of the screen assembly 10 allows the screen assembly 10 to better retain material and prevents material from leaking over the edges of the screen assembly 10 . The screen assembly 10 may also be configured to change shape under compressive force to convex or remain substantially flat when compressed or pinched. Thanks to the connecting strips present in the sieve assembly 10, the compressive load from the vibrating screen machine is distributed throughout the sieve assembly 10 . The sieve assembly 10 may include guide grooves on the connecting bars 12 to facilitate guiding the sieve assembly 10 into a predetermined position when mounted on the vibrating screen machine. Alternatively, the screen assembly may be installed on the vibrating screener without the connecting bars 12. Alternatively, guide grooves may be provided on the screen sections. The content of US Patent Application No. 12/460200 is incorporated into this application by reference and any embodiments described therein may be incorporated into embodiments of the present invention.

In FIG. 2 shows a screening module comprising substantially parallel screening module end segments 20 and substantially parallel screening module side segments 22 substantially perpendicular to the end segments 20. The screening surface 13 of the screening module comprises surface features 84 extending parallel to the end segments. 20 screening module and forming holes 86 sieves. See fig. 2D. The surface elements 84 have a thickness T, which can be varied depending on the screening application and the configuration of the sieve openings 86 . The thickness T can be equal to, for example, from about 43 microns to about 100 microns, depending on the required open screening area and the width W of the holes 86 of the sieve. The sieve openings 86 are oblong slits of length L and width W, which can be varied depending on the application. The width can be a distance from about 43 microns to about 2000 microns between the inner surfaces of each element 84 of the sieve surface. The screen openings need not be rectangular, but may be injection molded into any shape suitable for a particular screening application, including approximately square, round, and/or oval. To increase stability, the screen surface members 84 may comprise reinforcing fibrous materials that may extend substantially parallel to the end segments 20. The fiber may be aramid fiber (or its individual filaments), natural fiber, or other material with relatively high tensile strength. The contents of US Pat. No. 4,819,809 and US Patent Application No. 12/763,046 are incorporated into this application by reference and, accordingly, the embodiments described therein can be used in the sieve assemblies of the present invention.

The screening module 16 may include mounting slots 24 which are configured to allow the grating mounting elements 44 to pass through the mounting slots 24. The mounting slots 24 may have a tapered bore that can be filled by melting the portion of the elongated fastener 44 that rises above the screening surface of the screening module, attaching screening module 16 to the grate. Alternatively, the mounting slots 24 may be configured with a tapered bore to form a ridge on the screening surface of the screening module attaching the screening module 16 to the grate by melting the portion of the elongated fastener 44 that rises above the screening surface of the screening module. The screening module 16 may be a single piece injection molded from a thermoplastic. The screening module 16 may also be a plurality of thermoplastic injection molded pieces, each configured to cover one or more grate openings. The use of small screening modules 16, made of thermoplastic injection molding, which, when

- 15 039593 are attached to the sieve frame in the manner described here, providing significant advantages over traditional sieve assemblies. Injection molding of the thermoplastic screening modules 16 allows screen openings 86 to be formed with a width W that is so small as to be about 43 µm. This achieves fine and efficient screening. The arrangement of the screening modules 16 on grids, which can also be thermoplastic injection molded, makes it easy to assemble prefabricated screen assemblies with very fine screen openings. The location of the screening modules 16 on the gratings also allows for significant variation in the overall size and/or configuration of the screen unit 10, which can be changed by including more or less gratings, or gratings of different shapes. Moreover, the sieve assembly can have sieve openings of different sizes, or sieve openings that vary in size along a gradient, simply by having sieve modules 16 with different sieve openings attached to the gratings and the gratings connected in the desired configuration.

In FIG. 2B and FIG. 2C shows a bottom view of the screening module 16 with the first support segment 28 of the screening module extending between the end segments 20 and substantially perpendicular to the end segments 28. FIG. 2B also shows a second screen module support segment 30 orthogonal to the first screen module support segment 28 and extending between the side segments 22 and approximately perpendicular to the side segments 22. The screen module may also comprise a first series of amplifiers 32 substantially parallel to the side segments 22, and a second series of amplifiers 34 substantially parallel to the end segments 20. The end segments 20, side segments 22, the first screen module support segment 28, the screen module second support segment 30, the first amplifier sequence 32, and the second amplifier sequence 34 structurally stabilize the surface elements 84 screens and screen openings 86 under various loads, including the distribution of compressive forces and / or when exposed to vibration loads.

In FIG. 3 and FIG. 3A shows end grille section 14. End grille section 14 includes parallel end grille members 36 and parallel side grille members 38 substantially perpendicular to end grille members 36. FIG. The end element 14 of the lattice contains fasteners located along one end element 36 of the lattice and along the side elements 38 of the lattice. The fasteners may be latches 42 and latch slots 40 by which a plurality of grating sections 14 can be secured together. parts of the latches 42 go beyond the slots 40 of the latches and the side elements 38 of the gratings. As the latch 42 is pushed into the latch slot 40, the knobs of the latch are compressed together until the latches of each elongated portion of the latches are behind the side grille 38, allowing the latches to engage the inside of the side grille 38. When the latches are inserted into the latch slot, the side grille elements of the two separate grilles are side by side and secured to each other. The gratings can be separated by applying such force to the elongated parts of the latch that the elongated parts move towards each other, allowing the latches to come out of the slot of the latch. Alternatively, latches 42 and latch slots 40 may be used to connect the end member 36 of the grate to the end member of another grate, such as the center grate (FIG. 4). The end grille may include an end grille element 36 that does not have fasteners. Although fasteners are shown in the drawings as latches and latch slots, other types of fasteners and alternative latches and slots may be used, including other mechanical devices, adhesives, etc.

The assembly of the grid frame from grids, which can be sufficiently rigid, ensures the strength and durability of the grid frame and the sieve assembly 10 . The design of the sieve assembly 10 allows it to withstand high loads without damaging the screening surface and the supporting structure. For example, the pyramid-shaped lattice frames shown in FIG. 22 and 23 provide a very strong pyramid-shaped frame base that supports individual screening modules capable of very fine screening, with screen openings so small as to reach 43 microns. Unlike the pyramidal screen assembly embodiment of the present invention described herein, existing corrugated or pyramidal wire mesh screen assemblies are highly susceptible to deformation and/or damage under high loads. Therefore, unlike existing screens, the present invention provides very thin and very precise screen openings, while maintaining sufficient structural stability and resistance to damage, thus maintaining screening accuracy at various load values. The assembly of the screen frame from the screens also allows the size, shape and/or configuration of the sieve assembly to be substantially varied by changing the number and/or type of screens used to assemble the screen frame.

The end grille section 14 comprises a first grille support element 46 extending parallel to the grille side elements 38 and a second grille support element 48 orthogonal to the first grille support element 46 and perpendicular to the grille side elements 38. oblong

- 16 039593 fasteners 44 may be configured to mate with the fastening slots 24 of the screening module. The screening module 16 can be attached to the grate 14 using elongated fasteners 44 and screening module mounting slots 24. Part of the elongated fastener 44 may slightly protrude above the screening surface of the screening module when attaching the screening module 16 to the end grid 14. The mounting slots 24 of the screening module may have a conical bore, which can be filled by melting the part of the elongated fastener 44 that rises above the screening surface of the screening module. module. Alternatively, the mounting slots 24 of the screen module may not have a tapered bore, and the portion of the elongated fasteners extending above the screen surface of the screen module 16 may be configured to form a tide on the screen surface upon melting. See fig. 34 and 35. When connected, the screening module 16 covers at least one opening 50 of the grid. Materials passing through the sieve openings 86 pass through the grating opening 50 . The location of the elongated fasteners 44 and the corresponding location of the mounting slots 24 of the screening module provides a direction of attachment of the screening modules 16 to the gratings, simplifying the process of assembling the gratings. The elongated fasteners 44 pass through the fastening slots 24 of the screen module, guiding the screen module into the correct position on the grid surface. Through the use of elongated fasteners 44 and fastening slots 24 of the screening module, a reliable connection with the grid is achieved, and the screening surface of the screen unit 10 becomes stronger.

In FIG. 4 shows the central grate 18. As shown in FIG. 1 and FIG. 1A, a central grate 18 may be included in a sieve assembly. The central grate 18 has latches 42 and latch slots 40 on each of the end elements 36 of the grate. The end grate 14 has latches 42 and latch slots 40 on only one of the two side members 36 of the grate. The central gratings 18 can be connected to other gratings through each of their end grating members and side grating members.

In FIG. 5 shows a plan view of the connection bar 12. FIG. 5A shows a bottom view of the connector bar 12. The connector bars 12 have latches 42 and latch slots 40 which allow the connector bar 12 to be snap-fitted to the edge of the screen panel assembly (see FIG. 9). As with the gratings, the fasteners on the connecting bar 12 are shown as latches and latch slots, but other types of fasteners may be used to connect to the grating fasteners. Handles (see, for example, FIG. 7) may be attached to the connecting bars 12, which may facilitate the movement and installation of the sieve assembly. Tags and/or labels can also be attached to the connecting strips. As described above, the link bars 12 can increase the stability of the screen frame and can distribute the compressive load of the vibrating screener if the screen assembly is installed on the vibrating screen machine in compression as described in US Patent No. 7,578,394 and US Patent Application No. 12/460,200.

Screening modules, sieve assemblies, and parts thereof, including fasteners/elements as described herein, may contain nanomaterial distributed throughout them to increase strength, durability, and achieve other benefits associated with the use of specific nanomaterials or a combination of different nanomaterials. Any suitable nanomaterial can be used, including, but not limited to, nanotubes, nanofibers, and/or elastomeric nanocomposite materials. The nanomaterial can be distributed over screening modules and sieve assemblies and their parts in various proportions, depending on the desired properties of the final product. For example, some content of nanomaterials can increase the strength of the elements or make the screening surface more wear resistant. The use for injection molding of a thermoplastic material containing nanomaterials dispersed therein can provide greater strength while using less material. Thus, structural elements, including the support elements of the lattice frame and the support elements of the screening modules, can be smaller and stronger and/or lighter. This is especially advantageous in the manufacture of relatively small individual components, from which the finished sieve assembly is then assembled. Also, instead of fabricating separate grids that are connected with latches, a relatively strong and lightweight single grid structure containing distributed nanomaterials can be made. In this case, separate screening modules, containing or not containing nanomaterials, can be attached to a single finished structure of the lattice frame. The use of nanomaterials in the screening module provides strength while reducing the weight and size of the module. This can be especially useful when injection molding screening modules with very small openings, as the shape of the openings is maintained by the surrounding materials/elements. Another benefit of incorporating nanomaterials into screening modules is to improve the durability and wear resistance of the screening surface.

- 17 039593

Screen surfaces are prone to wear when used in harsh environments and in contact with abrasive materials, and the use of thermoplastics and/or thermoplastics with abrasion resistant nanomaterials ensures the durability of the screen surface.

In FIG. 6 shows subassembly 15 of a series of lattice sections. In FIG. 6A shows a subassembly of FIG. 6 in an exploded view, showing the individual gratings and the direction of their connection to each other. The subassembly comprises two end grid sections 14 and three center grid sections 18. The end grid sections 14 form the end portions of the subassembly, and the center grid sections 18 are used to connect the two end grid sections 14 with connections between the latches 42 and the slots 40 of the latches. Lattice Sections FIG. 6 are shown with screen modules 16 attached. By fabricating the screen assembly from screens assembled in sub-assemblies, each screen section can be customized and the screen assembly can be made from multiple screens in the configuration required for a particular screening task. The sieve assembly can be quickly and easily assembled and still have accurate sieving characteristics and sufficient resistance to the applied loads. Due to the design of the sieve frame and the screen modules 16, the configuration of the plurality of individual screen modules forming the screen surface of the screen assembly 10, and the fact that the screen modules 16 are injection molded from thermoplastic, the openings of the screen modules 16 are relatively stable and retain their dimensions under various loads, in including compressive loads, concavity deformations, and tension, which ensures optimal screening.

In FIG. 7 shows a sieve assembly 10 with connecting bars 12, with handles attached to the connecting bars 12. The sieve assembly is made of several lattice sections fastened together. Screening modules 16 are attached to the upper surfaces of the lattice sections. In FIG. 7A is a sectional view taken along line A-A of FIG. 7 showing the individual gratings attached to the screening modules which form the screening surfaces. As seen in FIG. 7A, the screens may have screen support members 48 configured such that when the screen support members 48 are connected to each other by means of latches 42 and latch slots 40, the screen assembly has a slightly concave shape. Since the screen assembly is made in a slightly concave shape, it can be configured to deform to the desired concavity when a compressive force is applied without the screen assembly having to be pre-concave. Alternatively, the grids may be configured to form a slightly convex screen assembly or a substantially flat screen assembly.

In FIG. 8 is a top perspective view of a sieve assembly partially covered by screen modules 16. FIG. 8 shows end screen sections 14 and center screen sections 18 connected to each other to form a screen assembly. The finished screening surface can be formed by attaching screening modules 16 to those shown in FIG. 8 uncovered lattice sections. The screening modules 16 can be attached to separate gratings before assembling the grating frame, or attached to the gratings after the gratings are connected to each other to form the grating frame.

In FIG. 9 shows the sieve assembly shown in FIG. 1, exploded view in a perspective view. This figure shows eleven sub-assemblies connected to each other by means of latches and latch slots located on the end elements of the gratings of the grating sections of each sub-assembly. Each subassembly contains two end screen sections 14 and three center screen sections 18. Connecting bars 12 are attached to each end of the assembly. By using a different number of subassemblies, or a different number of center screen sections in each subassembly, different sized screen assemblies can be created. The assembled sieve assembly has a continuous screening surface of the sieve assembly containing several screening surfaces of screening modules.

In FIG. 10 and 10A show the process of attaching the screening modules 16 to the end grid sections 14 in accordance with an embodiment of the present invention. The screening modules 16 can be aligned with the end grate sections 14 using the elongated fasteners 44 and the screening module mounting slots 24 in such a way that the elongated fasteners 44 pass through the mounting slots 24 of the screening modules and slightly extend beyond the screening surfaces of the screening modules. The elongated fasteners 44 can be melted and fill the tapered grooves of the screen module mounting slots 24 or, alternatively, form ridges on the screening surface of the screen module, attaching the screen module 16 to the grid section 14. screening modules is only one of the embodiments of the present invention. Alternatively, the screen module 16 may be attached to the end screen section 14 with adhesive, fasteners and attachment slots, etc. Although an embodiment is shown in which each screen has two screen modules, the present invention includes alternative configurations with one screen module per grate, several screening modules per grate, one screening module per grate opening, and one screening module covering several grates.

- 18 039593

The end grille 14 can be sufficiently rigid and be a single injection molded piece of thermoplastic.

In FIG. 10B is a plan view of the end grate section shown in FIG. 10A with sieve modules attached to the end grid. In FIG. 10C is a B-B sectional view of the end grate section shown in FIG. 10V, zoomed in. The screening module 16 is located on the end grate section so that the elongated fastener 44 passes through the fastening slot beyond the screening surface of the screening module. The portion of the elongated fastener 44 passing through the fastening slot beyond the screening surface of the screening module can be melted to attach the screening module 16 to the end grate section as described above.

In FIG. 11 and 11A show the process of attaching the screening modules 16 to the central lattice sections 18 in accordance with an embodiment of the present invention. Screening modules 16 can be aligned with the central lattice sections 18 using elongated fasteners 44 and fastening slots 24 of the screening modules in such a way that the elongated fasteners 44 pass through the fastening slots 24 of the screening modules and slightly protrude from the screening surfaces of the screening modules. The elongated fasteners 44 can be melted and fill the tapered grooves of the screen module mounting slots 24 or, alternatively, form ridges on the screening surface of the screen module, attaching the screen module 16 to the central grating section 18. 24 screening modules is only one of the embodiments of the present invention. Alternatively, the screen module 16 may be attached to the central grid section 14 with adhesive, fasteners and attachment slots, etc. Although an embodiment is shown in which each grid has two screen modules, the present invention contains alternative configurations with one screen module per grate, one screening module per grate opening, several screening modules per grate, and one screening module covering several grates. The central lattice section 18 may be sufficiently rigid and be a single piece, injection molded from a thermoplastic.

In FIG. 12 and 12A show a sieve assembly 10 mounted on a vibrating screen machine with two screening surfaces. The vibrating screen machine may have clamping devices on its sides as described in US Pat. No. 7,578,394. A compressive force may be applied to the link bar or side of the screen assembly, causing the screen assembly to deviate downward and assume a concave shape. The bottom of the screen assembly may be mated with the face of the screen assembly of the vibrating screen machine as described in US Pat. No. 7,578,394 and US Patent Application No. 12/460,200. The vibrating screener may include a central wall configured to receive a connecting strip of that side portion of the screen assembly that is opposite the side portion of the screen assembly receiving the compressive force. The central portion of the wall may be inclined such that applying a compressive force to the screen assembly deflects the screen assembly downward. The sieve unit can be installed on the vibrating screen machine with the possibility of supplying the material to be sieved to it. The sieve assembly may have guide grooves configured to mate with the shaker guides, whereby the sieve assembly may be guided during positioning, and may have a guide arrangement as described in US Patent Application No. 12/ 460200.

In FIG. 12B is a front view of the vibrating screen machine shown in FIG. 12. In FIG. 12B shows the screen assemblies 10 mounted on a vibrating screen machine, with a compressive force applied to deflect the screen assemblies downward and into a concave shape. Alternatively, the screen assembly may be preformed into a predetermined concave shape without applying a compressive force.

In FIG. 13 and 13A show the installation of the screen assembly 10 on a vibrating screen machine with a single screening surface. The vibrating screen machine may have a clamping device on its side. The screen assembly 10 may be located on the vibrating screen machine in the manner shown. A compressive force may be applied to the link bar or side portion of the screen assembly, causing the screen assembly to deviate downward and assume a concave shape. The bottom of the screen assembly may contact the interface of the screen assembly of the vibrating screen machine as described in US Pat. No. 7,578,394 and US Patent Application No. 12/460,200. The vibrating screener may include a side wall opposite the clamp, configured to accept a link bar or a side portion of the screen assembly. The central wall may be tilted such that a compressive force on the screen assembly deflects the screen assembly downward. The sieve unit can be installed on the vibrating screen machine with the possibility of supplying the material to be sieved to it. The sieve assembly may have guide grooves that can be mated with the guides of the vibrating screen machine, due to

- 19 039593 whereby the sieve assembly can be guided during installation to a predetermined position.

In FIG. 14 is a front view of screen assemblies 52 mounted on a double screen vibrating screen machine in accordance with an embodiment of the present invention. The sieve assembly 52 is an alternative implementation, characterized in that the sieve assembly is preformed to be suitable for installation on the vibrating screen machine without applying force to the sieve assembly, i.e. the sieve assembly 52 comprises a bottom portion 52A shaped to match the vibrating screen bed. rumble machine. The bottom portion 52A may be molded integrally with the screen assembly 52 or may be a separate piece. The screen assembly 52 includes features similar to the screen assembly 10, including gratings and screening modules, but also includes a bottom portion 52A that allows it to fit onto the bed 83 without being compressed into a concave shape. The screening surface of the sieve assembly 52 may be substantially flat, concave, or convex. The screen assembly 52 can be held in place by applying a compressive force to the side of the screen assembly 52 . The bottom of the screen assembly 52 may be preformed to fit any type of vibrating screen interface.

In FIG. 15 is a front view of a screen assembly 53 mounted on a single screen vibrating screen machine in accordance with an embodiment of the present invention. The screen assembly 53 contains similar features to the screen assembly 52 described above, including a bottom portion 53A molded to mate with the bed 87 of the vibrating screen machine.

In FIG. 16 shows the end support frame subassembly, and FIG. 16A shows the end support frame subassembly shown in FIG. 16, disassembled. The end support frame subassembly shown in FIG. 16 includes eleven end grid sections 14. Alternative configurations having more or fewer end grid sections may be used. The end lattice sections 14 are fastened together by means of latches 42 and slots 40 of the latches located on the side elements of the end lattice sections 14. In FIG. 16A shows the process of joining individual end grate sections to form an end support frame subassembly. As can be seen, the end support frame subassembly is covered with screening modules 16. Alternatively, the end support frame subassembly can be assembled from end gratings before the screening modules are attached, or partially from pre-coated grating sections and partially from uncoated grating sections.

In FIG. 17 shows the center support frame subassembly, and FIG. 17A shows the end support frame subassembly shown in FIG. 17, disassembled. The center support frame subassembly shown in FIG. 17 has eleven center bars 18. Alternative configurations having more or fewer center bars can be used. The central lattice sections 18 are fastened together by means of latches 42 and slots 40 of the latches located on the side elements of the central lattice sections 18. In FIG. 17A shows the process of joining the individual center trellis sections to form the center support frame subassembly. As can be seen, the center support frame subassembly is covered with screen modules 16. Alternatively, the center support frame subassembly can be assembled from center grids before the screen modules are attached, or partly from pre-coated grid sections and partly from uncovered grid sections.

In FIG. 18 is an exploded view of a screen assembly with three center support frame subassemblies and two end support frame subassemblies. The supporting frame subassemblies are fastened together by means of latches 42 and slots 40 of the latches on the end elements of the gratings. Each central lattice section is connected through end elements to two other lattice sections. The end elements 36 of the end lattice sections, which do not have latches 42 and slots 40 of the latches, form the end edges of the sieve assembly. The sieve assembly can be configured to contain more or less central support frame subassemblies or larger or smaller frame subassemblies. Connecting strips can be attached to the side edges of the sieve assembly. As can be seen, the sieve assembly contains screening modules installed on the screen sections before assembly. Alternatively, screening modules 16 may be installed upon completion of all or part of the assembly process.

In FIG. 19 shows an alternative embodiment of the present invention in which the screen assembly 54 is substantially flat. The sieve assembly 54 may be configured in a flexible configuration to be concave or convex, or may be substantially rigid. The sieve assembly 54 can be used with a flat screening surface. See fig. 39. As can be seen, the sieve assembly 54 has connecting bars 12 attached to the sides of the sieve assembly 54. Node 54 sieves may have a configuration containing various designs of lattice structures and screening modules described in this application.

In FIG. 20 shows an alternative embodiment of the present invention in which the screen assembly 56 is convex. The screen assembly 56 may be configured in a flexible configuration to a more convex shape, or may be substantially rigid. As can be seen, the sieve assembly 56 has connecting bars 12 attached to the sides of the sieve assembly. Node 56 sieve can

- 20 039593 have a configuration containing various designs of lattice structures and screening modules described in this application.

In FIG. 21 and 21A show an alternative embodiment of the present invention containing pyramid-shaped lattice sections. The sieve assembly is shown with connecting bars 12 attached. The sieve assembly comprises center and end grid sections 14 and 18 and center and end pyramidal grid sections 58 and 60. By incorporating pyramidal grid sections 58 and 60 into the sieve assembly, an increase in screening surface area can be achieved. In addition, the material to be screened can be controlled and guided. The sieve nodes can be concave, convex or flat. The sieve assembly may be configured in a flexible configuration to be reshaped to a concave or convex shape under compressive force. The sieve assembly may include guide grooves that may mate with the guide mating surfaces of the vibrating screen machine. Various configurations of screen sections and pyramidal screen sections can be used, thereby increasing or decreasing screening surface area and screening material flow characteristics. Unlike wire screens or similar technologies that use shirring and other operations to increase screening area, the presented screen assembly relies on a lattice frame that can be sufficiently rigid and able to withstand significant loads without damage or destruction. With high material flow, existing screen assemblies with corrugated screening surfaces are often flattened or damaged due to the weight of the material, which affects efficiency and reduces the screening surface of such screen assemblies. The screen assemblies described here are difficult to damage due to the strength of the screen frame, and the increased surface area benefits of using pyramidal screen sections can be maintained under significant stress.

In FIG. 22 and FIG. 22A shows a pyramidal end grille 58. The pyramidal end grille 58 includes first and second lattice frames defining first and second inclined grille openings 74. Pyramidal end gratings 58 comprise a crest 66, grating side members/bases 64, and first and second ramps 70 and 72, respectively, which converge at crest 66 and extend down to base 64. Pyramidal gratings 58 and 60 have triangular end members 62 and triangular middle support members 76. The angles of inclination of the first and second inclined surfaces 70 and 72 shown are exemplary only. Other angles can be applied to increase or decrease the area of the screening surface. The pyramidal end grille 58 has fasteners located along the side elements 64 and at least one triangular end element 62. The fasteners can be latches 42 and latch slots 40, with which several lattice sections 58 can be securely connected to each other. Alternatively , latches 42 and latch slots 40 may be used to connect pyramidal end grille 58 to end grille 14, center grille 18, or pyramidal center grille 60. the possibility of pairing with the mounting slots of 24 screening modules. The screening module 16 can be attached to the pyramidal end grate section 58 by mating the elongated fasteners 44 with the screening module mounting slots 24. Part of the elongated fastener 44 may slightly protrude above the screening surface of the screening module when attaching the screening module 16 to the pyramidal end grid 58. The mounting slots 24 of the screening module may have a conical bore, which can be filled by melting the part of the elongated fastener 44 that rises above the screening surface screening module. Alternatively, the mounting slots 24 of the screening module may not have a tapered bore, and the part of the elongated fasteners that extends above the screening surface of the screening module 16 may be able to form a tide on the screening surface during melting. When attached, the screening module 16 can cover the first and second inclined openings 74 of the grid. Materials passing through the screen openings 86 pass through the first and second grid openings 74 .

In FIG. 23 and FIG. 23A shows a pyramidal center grille 60. The pyramidal center grille 60 includes first and second lattice frames defining first and second inclined grille openings 74. The pyramidal center grille 60 includes a ridge 66, grille side members/bases 64, and first and second sloped surfaces 70 and 72, respectively, which converge at the crest 66 and extend down to the side member 64. The pyramidal center grille 60 has triangular end members 62 and triangular middle members 76. The angles of inclination of the first and second inclined surfaces 70 and 72 shown are exemplary only. Other angles can be applied to increase or decrease the area of the screening surface. The pyramidal central lattice 60 has fasteners located along the side elements 64 and both triangular end elements 62. The fasteners can be latches 42 and slots 40 of the latches, with the help of which several pyramidal central lattices 60 can be securely connected to each other. Alternatively, latches 42 and latch slots 40 may be used to connect the pyramidal center grille 60 to end grille 14, center grille 18, or pyramidal end grille 58. be configured to mate with the mounting slots of the 24 screening modules. The screening module 16 can be attached to the pyramidal central grid 60 by mating the elongated fasteners 44 with the mounting slots 24 of the screening module. Part of the elongated fastener 44 may slightly protrude above the screening surface of the screening module when attaching the screening module 16 to the pyramidal central lattice 60. The mounting slots 24 of the screening module may have a conical bore that can be filled by melting the part of the elongated fastener 44 that rises above the screening surface screening module. Alternatively, the mounting slots 24 of the screening module may not have a conical bore, and the part of the elongated fasteners that extends above the screening surface of the screening module 16 may be configured to form a tide on the screening surface during melting. When attached, the screening module 16 covers the slanted opening 74 of the grid. Materials passing through the sieve openings 86 pass through the grating opening 74 . Although pyramidal and planar lattice structures are shown, it should be understood that various shapes of lattices and corresponding screen modules can be made in accordance with the present invention.

In FIG. 24 shows a subassembly of a series of pyramidal lattice sections. In FIG. 24A shows the subassembly shown in FIG. 24, exploded, showing the individual pyramidal lattice sections and the direction of their connection. The subassembly comprises two pyramidal end grids 58 and three pyramidal center grids 60. The pyramidal end grids 58 form the end portions of the subassembly, and the pyramidal center grids 60 are used to connect the two end grids 58 via connections between the latches 42 and the slots 40 of the latches. Pyramidal grids are shown in Fig. 24 with screen modules 16 attached. Alternatively, the subassembly may be assembled from screens before screen modules are attached, or partly from pre-coated pyramidal screen sections and partly from uncoated pyramidal screen sections.

In FIG. 24B and 24C show the process of attaching the screening modules 16 to the pyramidal end grid 58 in accordance with an embodiment of the present invention. The screening modules 16 can be aligned with the pyramidal end grid 58 by means of the elongated fasteners 44 and the screening module mounting slots 24 in such a way that the elongated fasteners 44 pass through the mounting slots 24 of the screening modules and may slightly extend beyond the screening surfaces of the screening modules. The part of the elongated fasteners 44 that extends beyond the screening surface of the screening module can, when melted, fill the conical grooves of the screening module mounting slots 24 or, alternatively, form tides on the screening surface of the screening module, attaching the screening module 16 to the pyramidal lattice 58. fasteners 44 and fastening slots 24 screening modules is only one of the embodiments of the present invention. Alternatively, the screen module 16 may be attached to the pyramidal end screen 58 using adhesive, fasteners and attachment slots, etc. Although an embodiment is shown in which each pyramid end screen 58 has four screen modules, the present invention includes alternative configurations with two screening modules per one pyramidal end grid 58, several screening modules per one pyramidal end grid 58, and one screening module covering the inclined surface of several pyramidal grid sections. The pyramidal end grille 58 may be sufficiently rigid to be a single, injection molded thermoplastic piece.

In FIG. 24D and 24E show the process of attaching the screening modules 16 to the pyramidal center grid 60 in accordance with an embodiment of the present invention. Screening modules 16 can be aligned with the pyramidal central grid 60 using elongated fasteners 44 and screening module mounting slots 24 in such a way that the elongated fasteners 44 can pass through the fastening slots 24 of the screening modules and can slightly extend beyond the screening surfaces of the screening modules. The portion of the elongated fasteners 44 that extends beyond the screening surface of the screening module can be melted and fill the tapered grooves of the screening module mounting slots 24 or, alternatively, form lugs on the screening surface of the screening module by attaching the screening module 16 to the pyramidal lattice section 60. using elongated fasteners 44 and fastening slots 24 screening modules is only one of the embodiments of the present invention. Alternatively, the screening module 16 may be attached to the pyramidal central grid 60 with an adhesive,

- 22 039593 fasteners and mounting slots, etc. Although an implementation is shown in which each pyramidal central grate 60 has four screening modules, the present invention contains alternative configurations with two screening modules per pyramidal central grate 60, several screening modules per pyramidal a central grate 60, and one sifting module covering the inclined surface of several pyramidal gratings. The pyramidal center grille 60 may be sufficiently rigid to be a single, injection molded thermoplastic piece. Although pyramidal and planar lattice structures are shown, it should be understood that various shapes of lattices and corresponding screen modules can be made in accordance with the present invention.

In FIG. 25 is a plan view of a sieve assembly 80 containing pyramidal gratings. As can be seen, the sieve assembly 80 is formed by connecting screening subassemblies to each other, using alternately flat subassemblies and pyramidal subassemblies. Alternatively, pyramidal subassemblies may be connected to each other, or more or fewer pyramidal subassemblies may be used. In FIG. 25A is a C-C sectional view of the sieve assembly shown in FIG. 25. As can be seen, the sieve assembly has five rows of pyramidal screen sections and six rows of flat screen sections, with a row of flat screen sections between each row of pyramidal screen sections. Connecting bars 12 are attached to the screen assembly. Any combination of rows of flat screens and pyramidal screens can be used. In FIG. 25B is a sectional view of FIG. 25A, on a larger scale. In FIG. 25B, it can be seen that all the gratings are connected to other gratings and/or to a connecting bar by means of latches and latch slots.

In FIG. 26 is an exploded perspective view of a sieve assembly 80 containing pyramidal screen sections. This figure shows eleven sub-assemblies connected to each other by means of latches and latch slots present on the side elements of the lattice sections of each sub-assembly. Each flat subassembly contains two end grids 14 and three center grids 18. Each pyramidal subassembly contains two pyramidal end grids 58 and three pyramidal center grids 60. Connecting bars 12 are attached to each end of the assembly. When using a different number of subassemblies or a different number of central grid sections sieve nodes of different sizes can be created. The screening surface area can be increased by using more pyramidal subassemblies and reduced by using more flat subassemblies. The assembled sieve assembly has a continuous screening surface of the sieve assembly containing several screening surfaces of screening modules.

In FIG. 27 shows a screen assembly 80 mounted on a vibrating screen machine with two screening surfaces. In FIG. 30 is a front view of the vibrating screen machine shown in FIG. 27. The vibrating screening machine may have on its side parts the compressing devices of the vibrating screening machine. The screen assemblies may be arranged on the vibrating screen machine in the manner shown. A compressive force may be applied to the connecting bar or the side of the screen assembly, under the influence of which the screen assembly deviates to the bottom side and takes on a concave shape. The bottom of the screen assembly may contact the face of the vibrating screen assembly screen as described in US Pat. No. 7,578,394 and US Patent Application No. 12/460,200. The vibrating-screening machine may include a central wall with the possibility of installing that side part of the sieve assembly, which is opposite to the lateral part of the sieve assembly that receives the compressive force. The central portion of the wall may be inclined such that applying a compressive force to the screen assembly deflects the screen assembly downward. The sieve assembly can be installed on the vibrating screen machine in a configuration with the possibility of feeding the material to be sieved to it. The sieve assembly may have guide grooves configured to mate with the guides of the vibrating screener, whereby the sieve assembly can be guided during installation into a predetermined position.

In FIG. 28 is a perspective view of a sieve assembly with pyramidal gratings to which screen elements are not attached. The sieve assembly shown in Fig. 28 is slightly concave, but the sieve assembly may be more concave, convex, or flat. The screen assembly may be made up of several subassemblies, which may be any combination of flat subassemblies and pyramidal subassemblies. The sieve assembly shown contains eleven subassemblies, but may contain more or fewer subassemblies. The screen assembly is shown without screen modules 16. The screens can be assembled together before or after the screen modules are attached to the screens, or any combination of screens with attached screen modules and screens without screen modules can be assembled together. In FIG. 29 shows the sieve assembly shown in FIG. 28, partially covered with screening modules 16. The pyramidal subassemblies comprise pyramidal end gratings 58 and pyramidal center grates 60. The flat subassemblies comprise flat end gratings 14 and flat central gratings 18. The grating sections can be fastened together with latches and latch slots.

- 23 039593

In FIG. 31 shows a screen assembly 81 mounted on a single screen vibrating screen machine in accordance with an embodiment of the present invention. The sieve assembly 81 has a similar configuration to the sieve assembly 80, but contains additional pyramidal and flat assemblies. The vibrating screening machine may have a compressing device on its side. The screen assembly 81 may be located on the vibrating screen machine in the manner shown. A compressive force may be applied to the side portion of the screen assembly 81, under which the screen assembly 81 deviates to the lower side and assumes a concave shape. The bottom of the screen assembly may contact the face of the vibrating screen assembly screen as described in US Pat. No. 7,578,394 and US Patent Application No. 12/460,200. The vibrating screening machine may include a side wall opposite the squeezing device, configured to mount a side portion of the sieve assembly. The central wall may be tilted such that applying a compressive force to the screen assembly deflects the screen assembly downward. The sieve unit can be installed on the vibrating screen machine with the possibility of supplying the material to be sieved to it. The screen assembly may have guide grooves that are configured to mate with the shaker guides, whereby the screen assembly can be guided during positioning.

In FIG. 32 is a front view of screen assemblies 82 mounted on a double screen vibrating screen machine in accordance with an embodiment of the present invention. The sieve assembly 82 is an alternative implementation in which the sieve assembly is preformed to be suitable for installation on the vibrating screen machine without applying stress to the sieve assembly, i.e. the sieve assembly 82 comprises a bottom portion 82A shaped to match the vibrating screen machine bed . The bottom portion 82A may be molded integrally with the screen assembly 82 or may be a separate piece. The screen assembly 82 includes features similar to the screen assembly 80, including gratings and screen modules, but also includes a bottom portion 82A that allows it to fit onto the bed 83 without being compressed into a concave shape. The screening surface of the sieve assembly 82 may be substantially flat, concave, or convex. The screen assembly 82 may be held in place by applying a compressive force to the side of the screen assembly 82, or may simply remain in place. The bottom of the screen assembly 82 may be preformed to fit any type of vibrating screen machine interface.

In FIG. 33 is a front view of a screen assembly 85 mounted on a single screen vibrating screen machine in accordance with an embodiment of the present invention. The sieve assembly 85 is an alternative implementation in which the sieve assembly is preformed to be suitable for installation on the vibrating screen machine without applying stress to the sieve assembly, i.e. the sieve assembly 85 comprises a bottom portion 85A shaped to match the vibrating screen bed 87 cars. The bottom portion 85A may be molded integrally with the screen assembly 85 or may be a separate piece. The screen assembly 85 includes features similar to the screen assembly 80, including gratings and screening modules, but also includes a bottom portion 85A that allows it to fit on the bed 87 without being compressed into a concave shape. The screening surface of the sieve assembly 85 may be substantially flat, concave, or convex. The screen assembly 85 may be held in place by applying a compressive force to the side portion of the screen assembly 85, or may simply remain in place. The bottom of the screen assembly 85 can be preformed to fit any type of vibrating screen machine interface.

In FIG. 34 is a perspective view of the end grille shown in FIG. 3, to which one screening module is attached. In FIG. 35 is an enlarged view of the remote element E of the end grille shown in FIG. 34. In FIG. 34 and 35, the screening module 16 is partially attached to the end grid 38. The screening module 16 is aligned with the grid 38 by means of the elongated fasteners 44 and the fastening slots 24 of the screening modules in such a way that the elongated fasteners 44 pass through the fastening slots 24 of the screening modules and slightly out for screening surfaces of screening modules. As shown along the end of the screen module 16, portions of the elongated fasteners 44 extending beyond the screen surface of the screen module are melted and form lugs on the screen surface of the screen module, attaching the screen module 16 to the end grid section 38.

In FIG. 36 shows a slightly concave sieve assembly 91 with pyramidal gratings forming part of the sieve assembly 91 in accordance with an exemplary embodiment of the present invention. The screening surface of the sieve assembly may be substantially flat, concave or convex. The screen assembly 91 may be configured to change shape to a predetermined shape under the influence of a compressive load. The sieve assembly 91 as shown in FIG. 36 contains pyramidal gratings in that part of the sieve assembly that is installed on the material supply side of the vibrating screen machine. Part of the sieve assembly, containing pyramidal gratings, provides an increase in the area of the screening surface and direction of material flow. Part of the sieve assembly, installed on the discharge side of the vibrating screen machine, contains flat gratings. On the flat part, it can be provided

- 24 039593 area in which the material can dry and/or caking. The sieve assembly may include various combinations of flat and pyramidal gratings, depending on the desired configuration and/or the specific screening application. In addition, vibrating screeners using multiple screen assemblies may have individual screens of various configurations designed to be used together for a particular task. For example, the screen assembly 91 can be used in conjunction with other screen assemblies, while it is located on the discharge side of the vibrating screen machine to allow drying and/or caking of the material.

In FIG. 37 is a flowchart showing the manufacturing steps of a sieve assembly according to an embodiment of the present invention. As shown in FIG. 37, the sieve manufacturer can obtain the terms of reference for the sieve assembly. The terms of reference may contain at least one of the following: requirements for materials, open screening area, productivity and separation boundary of the sieve unit fractions. The manufacturer can then specify the screen opening requirements (shape and dimensions) of the sieve module as described in this application. After that, the manufacturer can determine the configuration of the sieve (for example, the dimensions of the unit, the shape and configuration of the screening surface, etc.). For example, the manufacturer may arrange screening modules in a flat configuration and/or a non-flat configuration. The flat configuration may be assembled from center grids 14 and end grids 14. The non-flat configuration may include at least a portion of pyramidal center grids 60 and/or pyramid end grids 58. The screening modules may be manufactured by injection molding. The lattice sections can also be made by injection molding, but need not be made in this way. As described in this application, screening modules and gratings may contain nanomaterial distributed therein. Once the screening modules and screen sections have been manufactured, the screening modules can be attached to the screen sections. Screening modules and gratings can be interconnected using connecting materials containing nanomaterial distributed in them. Several lattice sections can be joined together to form support frames. The central support frames are assembled from the central gratings, and the end support frames are assembled from the end gratings. Pyramidal support frames can be created from pyramidal lattice sections. The support frames can be connected so that the central support frames are in the central part of the sieve assembly and the end support frames are in the end of the sieve assembly. Connecting bars may be attached to the screen assembly. Different areas of the screening surface can be obtained by changing the number of pyramidal gratings that make up the sieve assembly. Alternatively, the screening modules can be connected to the grid sections after connecting several grids to each other or after connecting several support frames to each other. Instead of forming a finished screen assembly from several individual screens connected together, a one-piece screen structure can be made sized to match the desired screen assembly size. Individual screening modules can be attached to a one-piece lattice structure.

In FIG. 38 is a flowchart showing the manufacturing steps of a sieve assembly according to an embodiment of the present invention. The thermoplastic screening module can be manufactured by injection molding. The gratings can be made with the possibility of installing screening modules on them. Screening modules can be attached to the screens, and several screen subassemblies can be connected to form a screening surface. Alternatively, the gratings can be interconnected before the screening modules are attached.

In another example of the implementation of the present invention, a method for screening material is proposed, comprising: installing a sieve assembly on a vibrating screening machine and giving a concave shape to the upper screening surface of the sieve assembly, the sieve assembly comprising a screening module with a set of screen holes forming the screening surface of the screening module, and a grid with a plurality of elongated structural elements forming a lattice frame with lattice holes. Screening modules cover the openings of the grate and are attached to the upper surface of the grate. A plurality of gratings are fastened together and form a sieve assembly, and the sieve assembly has a continuous screening surface of the sieve assembly containing a plurality of screening surfaces of screening modules. The sieving module is a single piece made of thermoplastic injection molding.

In FIG. 39 is a perspective view of a vibrating screen machine with one flat screen screen assembly 89 mounted thereon, with part of the shaker screen omitted to better show the screen assembly. Node 89 sieves is a single node containing a lattice structure and screening modules, as described in this application. The lattice structure may be a single unit or may be several lattices connected to each other. Although the sieve assembly 89 is shown and is generally of the flat type, it may be convex or concave, and may be configured to be reshaped to concave by a compressive or the like. It may also be configured to

- 25 039593 top or bottom tension or may have a different configuration designed to be installed on various types of vibrating screen machines. Although the illustrated embodiment of the screen assembly covers the entire screen bed of the vibrating screen machine, the screen assembly 89 may also be configured in any desired shape or size and may cover only a portion of the screen bed.

In FIG. 40 is a perspective view of a sieve module 99 in accordance with an exemplary embodiment of the present invention. The screening module 99 has a substantially triangular shape. The screen module 99 is a single thermoplastic injection molded part and has similar features (including screen hole sizes) to the screen module 16 described above. Alternatively, the screening module may be rectangular, round, triangular, square, and so on. Screening modules of any shape may be used, and gratings of any shape may be used, provided that the grating has grate openings to match the shapes of the screening modules.

In FIG. 40A and 40B show a screen module structure 101, which may be a lattice type structure with screen modules 99 attached thereto forming a pyramid shape. In an alternative embodiment, the pyramidal screen module structure 101 may be entirely injection molded from a thermoplastic into a single pyramid-shaped screen module. In the configuration shown, the screening module structure has four triangular screening surfaces of the screening module. The bases of the two triangular screening surfaces lie at the two side elements of the screening module, and the bases of the other two triangular screening surfaces lie at the two end elements of the screening module. All screening surfaces are inclined upwards and converge at a central point, which is located above the end and side segments of the screening module. The angle of inclination of the screening surfaces can be changed. The screen module structure 101 (or, alternatively, individual screen module pyramids) can be attached to the grid structure as described herein.

In FIG. 40C and 40D show screen module structures 105 with screen modules 99 attached, with pyramid-shaped projections extending below the side segments and edge segments of the screen module structure 105. Alternatively, the pyramid may be entirely injection molded from thermoplastic into a single screen module having the shape of a pyramid. In the configuration shown, the individual screen modules 99 form four triangular screen surfaces. The bases of the two triangular screening surfaces lie at the two side segments of the screening module, and the bases of the other two triangular screening surfaces lie at the two end segments of the screening module. All screening surfaces are inclined downwards and converge at a central point, which is located below the end and side segments of the screening module. The angle of inclination of the screening surfaces can be changed. The screen module structure 105 (or, alternatively, individual screen module pyramids) can be attached to the grid structure as described herein.

In FIG. 40E and 40F show the screen module structure 107 with several pyramidal shaped projections that extend below and rise above the side segments and edge segments of the screen module structure 107. Each pyramid contains four separate screening modules 99, but can also be made as a single pyramidal screening module. In the configuration shown, each screen module has sixteen triangular screen surfaces forming four separate pyramidal screen surfaces. The pyramidal screening surfaces can be inclined above or below the end and side segments of the screening module. The screen module structure 107 (or, alternatively, individual screen module pyramids) can be attached to the lattice structure as described herein. Fig. 40-40F are only examples of options that can be used for screen modules and screen module support structures.

In FIG. 41-43 show cross-sectional profiles of exemplary thermoplastic injection molded screen module surface designs that can be used in various embodiments of the present invention described herein. The shapes and configurations of screening modules are not limited to those shown here. Because the screening module is injection molded from a thermoplastic, a variety of variations can easily be made that can be used in the various embodiments of the present invention described in this application.

In FIG. 44 shows a prescreen structure 200 used on vibrating screeners. The pre-screening structure 200 comprises a support frame 300 partially covered by separate pre-screening units 210 . The pre-screen units 210 are shown as having multiple pre-screen modules 216 mounted on the pre-screen grates 218. Although the pre-screen units 210 are shown as having six interconnected pre-screens 216, various numbers and types of grids can be joined together to form pre-screen units 210 having different shapes and sizes. The pre-screen units 210 are attached to the support frame 300 and form a continuous screening surface 213. The pre-screen unit 200 may be installed above the main screening surface. The pre-screen assembly 210, pre-screen modules 216, and pre-screen grids 218 may comprise any of the features of the various embodiments of the sieve assemblies, screen modules, and lattice structures described herein and may be configured to be mounted on the pre-screen base frame 300, which can have various shapes and configurations depending on the pre-screening applications. The pre-screen structure 200, pre-screen assembly 210, pre-screen modules 216, and pre-screen grids 218 may be configured for use in the pre-screen technology (eg, compatible with screen mounts and configurations) described in US Patent Application No. 12/051,658 .

In FIG. 44A shows a pre-screen assembly 210 on an enlarged scale.

The embodiments of the present invention described herein, including screening modules and sieve assemblies, may be configured for use with a variety of vibrating screeners and parts thereof, including machines designed to screen wet and dry materials, machines with multiple tiers and / or several screens, as well as machines with various screen attachment devices, such as tension mechanisms (bottom and top mounting), compression mechanisms, clamping mechanisms, magnetic mechanisms and others. For example, the sieve assemblies described herein may be configured to be installed on the vibrating screen machines described in US Pat. Nos. 7,578,394; 5332101; 6669027; 6,431,366 and 6,820,748. Indeed, the screen assemblies described herein may include: side portions or connecting bars with U-shaped elements configured to receive force from top-mounted tension members, such as those described in US Pat. No. 5,332,101; side portions or connecting strips with slots under the fingers, made with the ability to receive force from the elements of the tension with bottom mounting, for example, described in US patent No. 6669027; side parts or connecting strips for compression loading, for example, as described in US patent No. 7578394; or may be mounted and loaded onto stacked machines, such as those described in US Pat. No. 6,431,366. including the technologies of guide assemblies and preformed panels described in it. In addition, the sieve assemblies and sieve modules may be configured for use in prescreening technologies (eg, be compatible with mounters and sieve configurations) described in US Patent Application No. 12/051658, US Pat. No. 7,578,394; 5332101; 4882054; 4857176; 6669027; 7228971; 6,431,366 and 6,820,748 and U.S. Patent Applications Nos. 12/460,200 and 12/051,658, which, together with all related families of related patents and applications, as well as patents and patent applications referred to in the documents listed above, are expressly incorporated into this application by reference.

The invention has been described above with reference to specific examples of embodiments. However, it will be apparent to those skilled in the art that various modifications and variations of the present invention can be made without departing from its scope and spirit. The foregoing description and the accompanying drawings are therefore to be considered as illustrative and not limitative of the invention.

Claims (27)

CLAIM 1. A sieve containing a screening module containing a screening surface of the screening module with a set of sieve holes; and lattices that contain a plurality of elongated structural elements forming a lattice frame with lattice openings; moreover, the screening module covers at least one opening of the grid and is attached to the upper surface of the grid, several individual grids are fastened together and form a sieve assembly, and the sieve assembly has a continuous screening surface of the sieve assembly, containing a plurality of screening surfaces of the screening modules, the screening module contains, essentially , parallel end segments and essentially parallel side segments, essentially perpendicular to the end segments, the screening module also contains the first support segment of the screening module and the second - 27 039593 sieving module support segment orthogonal to the first sifting module support segment, wherein the first sieving module support segment extends between the end segments and is approximately parallel to the side segments, and the second sieving module support segment extends between the side segments and is approximately parallel to the end segments, the sifting module comprises the first sequence of amplifiers, essentially parallel to the side segments, and the second sequence of amplifiers, essentially parallel to the end segments, and the screening surface of the screening module contains elements of the surface of the sieve, forming the openings of the sieve, and the end segments, side segments, the first and second support segments, the first and second reinforcement sequences structurally stabilize the sieve surface and sieve opening elements, with the sieve module being a single thermoplastic injection molded part. 2. The sieve according to claim 1, characterized in that the elements of the surface of the sieve run parallel to the end segments and are elongated elements that form the holes of the sieve, and the holes of the sieve are oblong slots with a distance between the inner surfaces of each element of the sieve surface from about 43 microns to about 1000 µm. 3. The sieve according to claim 1, characterized in that the sieve surface elements run parallel to the end segments and are elongated elements forming the sieve openings, and the sieve openings are elongated slots with a distance between the inner surfaces of each sieve surface element from about 70 microns to about 180 µm. 4. The sieve according to claim 1, characterized in that the elements of the surface of the sieve run parallel to the end segments and are elongated elements that form the openings of the sieve, and the openings of the sieve are oblong slots with a distance between the inner surfaces of each element of the sieve surface from about 43 microns to about 106 µm. 5. The sieve according to claim 1, characterized in that the elements of the sieve surface run parallel to the end segments and are elongated elements forming the sieve holes, and the sieve holes are elongated slots having a width and length, and their width is from about 0.044 mm to about 4 mm, and the length is from about 0.088 mm to about 60 mm. 6. Screen according to claim 1, characterized in that at least one of said grids is a single piece made by injection molding of thermoplastic. 7. The sieve according to claim 1, characterized in that the first grating of said gratings comprises a first base with a first fastener engaging with a second fastening element of the second base of the second grating of said gratings, due to which the first and second fasteners fasten together the first and second lattice. 8. Screen according to claim 7, characterized in that the first fastening element is a latch and the second fastening element is a latch slot, and the latch is fixed in the latch slot and securely fastens the first and second grids together. 9. The sieve according to claim 1, characterized in that the first and second support segments of the screening module and the end segments of the screening module contain a mounting device, having a configuration with the ability to connect with the grid mounting device. 10. The sieve according to claim 9, characterized in that the grating fixture includes elongated fasteners, and the screening module fixture includes fastening slots that engage with the elongated fasteners, securely attaching the screening module to the grate. 11. The sieve according to claim 10, characterized in that a part of at least one of the specified elongated fasteners passes through the corresponding fastening slot of the screening module and slightly extends beyond the screening surface of the screening module, and the specified corresponding fastening slot has such a conical bore that when melting said part of said at least one elongated fastener extending beyond the screening surface of the screening module, the melted part of this at least one elongated fastener fills the specified conical bore and securely attaches the screening module to the grate. 12. The sieve according to claim 10, characterized in that part of at least one of said elongated fasteners passes through the corresponding fastening slot of the screening module and slightly extends beyond the screening surface of the screening module in such a way that when said part of said at least one is melted elongated fastening device extending beyond the screening surface of the screening module, the molten part of this at least one elongated fastening element forms a tide on the screening surface of the screening module, due to which it securely attaches the screening module to the grid. 13. Sieve according to claim 1, characterized in that the elongated structural elements contain, according to su - 28 039593 to the society, parallel end elements of the lattice and essentially parallel side elements of the lattice, essentially perpendicular to the end elements of the lattice, and the elongated structural elements also contain the first support element of the lattice and the second support element of the lattice, orthogonal to the first support element of the lattice, the first the grating support segment extends between the end grille elements and is approximately parallel to the grille side elements, and the second grille support segment extends between the grille side elements, is approximately parallel to the grille end elements and is substantially perpendicular to the grille end elements. 14. Sieve according to claim 1, characterized in that it contains a second screening module; and a second lattice frame; moreover, the lattice frame forms the first opening of the lattice, and the second lattice frame forms the second opening of the lattice, and at least one of these lattices contains a comb and a base, while the lattice frame and the second lattice frame contain first and second inclined surfaces that reach the crest and extend down from the crest to the base, and the screening module and the second screening module cover the first and second inclined surfaces, respectively. 15. The sieve according to claim 1, characterized in that the sieve openings have at least one of the following shapes: rectangular, square, round or oval. 16. A sieve according to claim 1, characterized in that the elements of the sieve surface run parallel to the end segments and form sieve openings. 17. The sieve according to claim 1, characterized in that said sieve assembly has an open screening area of at least 16% of the total continuous screening surface area of the sieve assembly. 18. Screening module containing the screening surface of the screening module with elements of the surface of the sieve, forming the holes of the sieve; a pair of substantially parallel end segments; a pair of substantially parallel side segments substantially perpendicular to the end segments; the first reference segment of the screening module; a second screen module support segment orthogonal to the first screen module support segment, wherein the first screen module support segment extends between the end segments and is approximately parallel to the side segments, and the second screen module support segment extends between the side segments, is approximately parallel to the end segments, and is substantially perpendicular side segments; a first series of amplifiers substantially parallel to the side segments; a second series of amplifiers substantially parallel to the end segments, wherein the end segments, the side segments, the first and second support segments, the first and second series of amplifiers structurally stabilize the elements of the screen surface and the screen opening, and the screening module is a single injection molded part, wherein the sieve surface elements are elongated elements forming the sieve openings, and the sieve openings are elongated slits with a distance between the inner surfaces of each sieve surface element from about 43 µm to about 1000 µm. 19. Screening module according to claim 18, characterized in that it is a single piece made by injection molding of a thermoplastic. 20. A screening module as claimed in claim 18, characterized in that it is rectangular and approximately two inches wide and approximately three inches long. 21. Screening module according to claim 18, characterized in that the elements of the sieve surface run parallel to the end segments. 22. Screening module according to claim 110, characterized in that the elements of the sieve surface run perpendicular to the end segments. 23. The screening module according to claim 18, characterized in that the screening surface of the screening module has a corrugated shape. 24. Screening module according to claim 18, characterized in that the sieve surface elements are elongated elements forming the sieve openings, and the sieve openings are elongated slits with a distance between the inner surfaces of each sieve surface element from about 70 microns to about 180 microns. 25. Screening module according to claim 18, characterized in that the elements of the sieve surface are elongated elements forming the sieve holes, and the sieve holes are elongated slots with a distance between the inner surfaces of each element of the sieve surface from - 29 039593 from about 43 µm to about 106 µm. 26. The sieve module of claim 18, wherein the sieve openings are oblong slits having a width and length, wherein the width is from about 0.044 mm to about 4 mm and the length is from about 0.088 mm to about 60 mm. 27. A screening module according to claim 18, characterized in that it has an open screening area of at least 16% of the total screening surface area of the screening module.