CS196089B1 - Apparatus for superficially melting thermoplastic webs - Google Patents

Description

SOCIALIST DESCRIPTION OF THE INVENTION OF THE COPYRIGHT 196089 (Π) (Bl)

(51) Int. C1.3D 04 H 1/54 / 22 / Registered 27 12 77/21 / / PV 8824-77 / (JOl Posted on 06 06 79

OFFICE OFFICE (45) Released 15 05 82

AND DISCOVERY (75)

The inventor

MAZAL OLDŘICH and MRSTINA VÁCLAV, BRNO (54) Equipment for surface melting of thermoplastic sheet formations 1

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for fusing the surface of thermoplastic sheets, for example at least 10 wt. % of synthetic thermoplastic fibers, wherein the device allows to consolidate the sheet in the longitudinal and / or transverse direction.

The known fusing devices allow the surface of the progressive thermoplastic covering, usually nonwoven, to be treated with radiant heat to melt or melt the surface thermoplastic fibers and to be converted into a reinforcing surface or intermittent layer.

A disadvantage of these known devices is that the melted reinforcing layer formed by them gives a limited degree of strength to the formation, so that it cannot be used where the tension is elevated.

It is also known to reinforce flat-screened mesh structures, formed by crossing one or more assemblies, which are bonded to each other by bonding or using thermoplastic properties of at least one thread.

A disadvantage of this method is the need for a separate device for producing non-woven sieve and, in the case of use, a binder which is advantageous in that the binder usually has a chemical property and resistance than the associated yarns. This variation exhibits a degradation of the binder, and thus a deterioration of the useful structure reinforced by the web, more closely with the time of use of the nonwoven web.

Based on a detailed analysis of the advantages and disadvantages of the known melting devices and of the known non-woven fabric manufacturing apparatus, it has been proposed to design a device which not only obviates the disadvantages described, but which additionally complies with the simplicity of the apparatus and the rationalization of the manufacturing process.

These conditions are fulfilled by a device for surface coating of thermoplastic sheet metal, comprising, in addition to the means for guiding the thermoplastic sheets and at least one melting body, also two horizontal, parallel and co-mounted cooling calender rolls. that the means for guiding and laying the yarn threads and / or the weft threads comprise a grooved roller for securing the warp threads, parallel to the first cooled calender roll opposite the second cooled calender roll, and a gripper assembly pivotally mounted on both faces of the first roller. a weft yarn and a plurality of grippers are provided with a reversible sprocket and both sprockets are banded by a common endless chain, supported by the carrier carrying it the conductor between the dead centers, in which the longitudinal axis of the conductor coincides with the extended axle of the sprocket, and that a knife for cutting the weft threads is located on the underside of each gripper assembly. .

In particular, the device according to the invention is advantageous because it combines a fusion operation with a yarn structure production operation, thereby 196089

Claims (2)

196089 not only increases productivity but also eliminates the need for a binder that is replaced by a melted surface layer of a thermoplastic sheet. The device allows to consolidate the planar structure either with two mutually interconnecting threading systems, or just one thread system, e.g., only a weft or warp only, since the threads are instantaneously embossed in the melted surface of the sheet-like structure. These yarns may be of various kinds of materials, such as cotton, wool, viscose, jute, synthetic fibers or mixed materials. Further advantages of the device according to the invention are exemplified by the description of an embodiment thereof, schematically shown in the drawing, in which: Figure 1 is a side view of the device, Figure 2 is a top view of the device of Figure 1; FIG. 4 is a top plan view of the apparatus of FIG. 3. The fusing apparatus of the present invention comprises two horizontal, parallel and water-cooled, water-cooled rollers, the first calender of the invention. and a second calender roll. The second calender roll 2 is provided with a fusible body 3 which is adjustable over its entire length. In both cells of the first calender roll 6, a flange 6 bearing a pin-like retaining system 7 is disposed on the shaft 6 of the cylinder 6 to be spring-loaded. A rotatable sprocket 7 is positioned above each gripper assembly 6, and the sprocket wheels 8 are wrapped with a common non-final chain 8 provided with a gripper 2 carrying a yarn guide 10 which moves so as to move between the dead centers A and B in which the longitudinal axis of the yarn guide 10 coincides with the elongated vertical axis of the chain wheel 11, i. that the yarn guide 10 is reversibly retracted along the straight paths between the two drill holes A and B when circulating the endless chain. The endless chain drive is derived from the control motor 12 mounted on the frame 13 of the device. In front of the first calender roll 6, on the opposite side to the second calender roll 6, is a grooved roller 14 serving to provide the desired warp yarn to be fed to the nipple 16. the rollers 6, 6. In the space below the warp roller 16, a first charge 17 of the first sheet 18 is deposited and, on the opposite side of the device, a second wrapper 19 of the second sheet 20 is horizontally positioned on the second calender roll. A plunger 21 is provided for the weft threads 22 to be cut off at the upper part of the device. A bobbin 23 is provided above the endless string 6 with a weft thread supply 22 supplied to the carrier 2 with a threaded conductor 20. In the lower part of the device, for example under the calendering rollers 6, there is a device for wrapping the connected flats into the sheet 24. The device according to the invention operates as follows: Between the calendering rollers 17, a first flat shape 18 comprising at least ~ partially thermo-object A device for melting the surface of thermoplastic sheet materials, including, in addition to the thermoplastic sheet material, a second sheet 20 comprising at least partially a thermoplastic material. In addition, a warp yarn assembly 15 is provided from the warp roller 16, the grooved roller 14 of which is provided at a distance therebetween, through which the warp yarns 15 advance to the nip of the two calender rolls 1, 2. 23 feeds the thread 22 into the carrier with a thread guide 10, reversibly advancing between the two drills A, 8 by being driven by an endless chain 6 circulating around the two sprockets driven by the control motor 14 mounted on the frame 13. Upon reaching either of the two dead centers A, 2 introduces the yarn 22 between the grippers 6, which in this exemplary embodiment are in the form of sprung pins. These grippers 6 rotate in the rotational direction of the first calender roll. The pivoting of the grippers 2 derives from the movement of the yarn guide 10 at each dead center or point 2, thereby achieving a mutual synchronization of the movement of both the yarn guide 10 and the yarn traps 6. The weft yarn assembly 22 and the yarn yarn assembly 15 are fed The calender rolls 18, 20, wherein the surface structures 18, 20 comprise at least partially thermoplastic material, are at least partially melted by the fusible body 3 facing them. The connection of the two planar structures is effected by compressing them in the nip of the two calendering rollers, while clamping and gluing on the melted surface of the weft yarn assembly 22 and the warp threads between the planar structures. 15. In this way, the joined formations 18, 20 both in the longitudinal and transverse directions are reinforced. Upon exiting the clamp of the calender rolls 2, the weft yarns 2 held by them 2 are cut off with knives 21 on the edges of the joined planar bodies 20, which are then wrapped in a sheet 24. The device of the invention can also be used to fasten only one weave yarns. In this case only a second sheet 20 containing at least partially a thermoplastic material is fed from the second package 19, the melted surface of which is connected to a set of warp yarns 15 and weft yarns 22 formed by the process described above. The device according to the invention makes it possible to produce a mere yarn structure consisting of warp yarns 15 and weft yarns 22a serving as a semi-finished product for strengthening, for example, nonwovens or packaging mats. In the manufacture of the yarn structure, the first web 18 is fed with a nonwoven web of fibrous web, ie. about 50 g / m 2, which predominantly comprises thermoplastic fibers which, after non-melting through the fusible body 6, form a cross-linked set of yarns 15 and 22 fed as described above. It is to be understood that the device according to the invention makes it possible to omit either a set of warp threads 56 or a set of weft threads 22, so that the planar structure or formation is only fixed in one direction, i.e. longitudinally or transversely. In the case of structures and at least one melting body, two horizontal, mutually parallel and arranged side-by-side cooling rollers are provided, characterized in that means for guiding and laying the system of yarn threads and / or weft yarns. include a grooved roller (14) for providing warp threads (15) parallel to the first calender roll (1) opposite to the second roll roller (2), and a gripper assembly is rotatably mounted on both faces of the first roll roller (1). (6) weft yarns (22) and a rotatable sprocket (7) above each set of grippers (6) and both chain wheels (7) are wound with a common endless chain (8) provided with a carrier (9) carrying a conductor between the returns (A and B), in which the longitudinal axis of the nitride (10) coincides with the elongated vertical (11) of a chain wheel (7), at the bottom of the clamp of the two calender rolls (1, 2) there is a knife (21) for cutting the weft threads (22) in each gripper assembly (6). 2 sheets of Sevctogragia drawings. n. p «. race 7. Most REPAIR OF THE DESCRIPTION OF THE INVENTION FOR AUTHENTIC CERTIFICATE No. 196 089/51 / lnt.Cl.3 -D04H1 / 54 In the description of the invention to the author's certificate No. 196 089, the author's name is incorrect: Location: MAZAL OLDŘICH : LOSS OLDŘICH OFFICE AND DISCOVERY