DE202012012859U1 - Narrow surface coating device for applying a glue-free heat-activatable edge coating by means of hot air or hot gas - Google Patents

Abstract

Edge coating device (1) for applying a band-shaped edge strip (4) to narrow surfaces (6) of a workpiece (5), the edge strip (4), in particular multi-layer adhesive-free or with a hot melt adhesive layer between edge strips (4) and narrow surface (6), being heat-activated can be fastened to the narrow surfaces (6), comprising at least one feed device (7) for the edge strip (4) and a pressing device (9) which presses the edge strip (4) against the narrow surface (6) of the workpiece (5), characterized in that that in the area of the feed device (7) and / or pressing device (9) an outlet (10) for hot air or hot gas (16) is arranged, which the hot air (16) or the hot gas under pressure on the edge strips (4) and / or the heat-activated layer of the edge strip (4) and / or the narrow surface (6) of the workpiece (5) gives up, with the outlet (10) in fluid communication for the hot air (16) or Standing hot gas, a heating device (3) is provided, which brings the hot air (16) or the hot gas at least to the required activation temperature for the heat-activated layer of the edge strip (4) or the hot melt adhesive and the hot air (16) or the hot gas under increased pressure the atmospheric pressure strikes the edge strip (4) and / or the heat-activated layer of the edge strip (4).

Description

The present invention relates to a thin-surface coating device for applying a particular multilayer adhesive-free or with an adhesive layer between edge strip and narrow surface, heat-activated, strip-shaped edge strip on narrow surfaces of a workpiece.

Devices for applying an edge strip to a narrow surface of a workpiece, in particular a wooden workpiece, are known in different embodiments. These so-called Kantenanleimvorrichtungen be used in woodworking to apply edge strips (also called edge banding) on a narrow surface of a workpiece. Machine-driven special machines are often used for this purpose, which are predominantly suitable for applying edge strips to small workpiece surfaces. These special machines are relatively expensive, but provide good results in terms of accuracy of fit of the edge strip on the workpiece surfaces.

Edge strips are usually used so far, which are provided on one side with an activatable hot melt adhesive or have not yet applied an adhesive. The edge strip is accurately cut with supernatant according to the narrow surface length of the workpiece to be machined, placed on the workpiece surface, fixed after application of a viscous under heat adhesive on the edge or on the workpiece surface or activation of a pre-applied hot melt adhesive on the narrow surface and optionally reworked manually or by machine , This method, however, often provides insufficient results in terms of accuracy of fit of the edge strip. Thus, in addition to the complicated handling of hot-melt adhesives (eg EVA or PUR) during application and pressing, in particular in the case of thermally activated hot melt adhesives applied in advance, the hot melt adhesive layer, after application, due to its necessary layer thickness and its partial hardening on the finished workpiece aesthetically disadvantageous remains visible. Also, the temperature of the hot melt adhesive layer is delicate, because on the one hand the highest possible coating temperature is to be responsible for a temperature resistance and durability and to process the hot melt adhesive even at higher feed rates of edging safe, on the other hand, the material of the existing often plastic materials edge strip but this must not be affected. It also comes by the time between heating of the hot melt adhesive layer and the actual pressing of the edge strip to cooling effects of the hot melt adhesive, z. B. by different heat flow into the usually cold workpiece, through which the hot melt adhesive is often not in the optimum temperature range in the bond and therefore either too tough or too thin liquid, whereby the bonding of the edge strip is not optimal or the adhesive layer visible remains.

As a result of these problems, other edge banding materials have been developed that can prevent these disadvantages. For example, from the EP 1 163 864 B1 and from the EP 1 852 242 B1 So-called adhesive edge band known, consisting of two preferably coextruded layers of different plastic materials, one of which is melted by the influence of laser light so that they can be applied as in the known hot melt adhesive layers on narrow surfaces and bonded to these narrow surfaces. In addition to the coextruded edges, there are also other edge variants. These are, for example postcoextruded or subsequently provided with a coating (eg with polyolefin). The different coatings ideally have the same or a similar color as the edge strip itself. The other of the two layers is not changed by the laser light and forms the visible outside of the edge strip. Here, these two co-extruded, post-coextruded or subsequently coated layers are visually the same or similar looking formed and in particular also the same or a similar color, so that the already only thin molten layer after applying the edge strip optically not or only slightly from the Rest of the edge strip is different. In the industry is therefore spoken of either the so-called. Nullfuge or with reference to the previously common type of thermal activation of the laser edge.

However, a disadvantage of this type of coating of narrow surfaces on furniture panels or the like is that this type of coating of the narrow surfaces requires a high expenditure on equipment. So are extensive laser systems, z. As lasers with powers of 2 kW and more, required for the heating of the laser edges, also the occupational safety is problematic because of the use of high-energy lasers and there are problems in heating the edge strips, which depend on the shape of the edge strip. It is therefore out of the EP 1 800 813 A2 or from the DE 20 2009 009 253 U1 known to use for the thermal activation of the edge strip instead of a laser beam plasma-shaped gases whose production and handling should be easier than in the laser activation. However, this is one too not inconsiderable expenditure on equipment necessary, so that this technical solution as well as the laser activation of the edge strips is not suitable for the smaller craftsman or even the home improvement.

The object of the invention is to provide an inexpensive and flexible type of coating of narrow surfaces of workpieces, in particular with multi-layer adhesive or with an adhesive layer between edge strips and narrow heat-activatable edge strips available, which is easy to make apparatus and beyond a high accuracy of fit and optical quality ensures the edge strip on the narrow surface of the workpiece.

The solution of the object of the invention results in terms of the device from the characterizing features of claim 1 and 18 in cooperation with the features of the preamble. Further advantageous embodiments of the invention will become apparent from the dependent claims.

The invention is based on a narrow-surface coating device for applying a band-shaped edge strip on narrow surfaces of a workpiece, wherein the edge strip can be heat-activatable on the narrow surfaces in a multi-layer adhesive-free manner or with a melt adhesive layer between edge strips and narrow surface (so-called zero joint or laser edge), comprising at least one supply device for the Edge strip and a pressing device, which presses the edge strip to the narrow surface of the workpiece. In such an edge coating device, an outlet for hot air or the hot gas is arranged according to the invention in the region of supply and / or pressing device, which gives up the hot air or the hot gas under pressure on the edge strip and / or the heat-activatable layer of the edge strip, with the outlet a heating device is provided in fluidic connection for the hot air or the hot gas standing, which brings the hot air or the hot gas at least to the required activation temperature for the heat-activatable layer of the edge strip or the hot melt adhesive. Under pressure, with which the hot air or the hot gas is applied to the edge strip and / or the heat-activatable layer of the edge strip, this is a pressure of the hot air or the hot gas to understand that is higher than the pressure which can be ensured with known hot air blowers ,

It has surprisingly been found that edge strips in the form of the zero joint or laser edge, which usually consists of two-layered, mostly co-extruded, post-coextruded or subsequently z. B. coated with polyolefins materials, but also with hot air or the hot gas are heat activated so that they can be securely bonded to the narrow surfaces of the workpiece. This is surprising insofar as such edge strips are not heated in a conventional manner just in a conventional manner, but get very metered heat supplied by laser or plasma, which cause only a small and slightly thick heat-activated zone in which the edge strip then directly with the narrow surface of the Workpiece must be glued. Moreover, heating the heat-activatable layer of the edge strip over a large area, for example by hot air or hot gas, which is basically known in the case of the conventional adhesive-coated edge strips, does not lead to the desired result of local melting of the heat-activatable layer of the edge strip. If such heating of the edge strip is carried out with commercially used hot air blowers or the like., The output of such blowers pressure and partly the flow of hot air or hot gas for heat activation at a corresponding feed of the adhesive-free edge strips in question is not enough. The heat-activatable layer of the edge strip is not or not sufficiently melted, so that an adhesion of the edge strip with the narrow surface of the workpiece can not be done or not reliable at a corresponding, economically portable feed. If, however, the temperature of the hot air or of the hot gas and the volume flow of the hot air or the hot gas is significantly increased, and the hot air or the hot gas hits with a correspondingly high pressure, which is higher than the pressure which can be ensured with known hot air blowers on the Edge strip or its heat-activatable layer, it is surprisingly achieved with the laser activation or the plasma activation comparable heat activation of the edge strip, which allows processing of the edge strip as in the originally provided activation method. Here, the generation of a corresponding volume flow of the hot air or the hot gas under higher pressure, which is higher than the pressure which can be ensured with known hot air blowers, which incident on the edge strip or its heat-activatable layer in the intended manner, with much lower technical Effort possible than in the laser activation or plasma activation and thus overall much cheaper. In addition, the edge coating device according to the invention makes it possible to process corresponding edge strips both on smaller edge coating devices, such as those used by craftsmen or do-it-yourselfers, and also to retrofit existing conventional edge coating devices for processing Edge strips of the type zero joint or laser edge possible. Even the use of industrial coating machines works without problems. This makes the applicability of edge strips in the form of zero joints both the more artisanal use and the industry made accessible. Of particular importance here is that the hot air or the hot gas as close as possible before the first pinch roller and as close to the edge strip or the heat-activatable layer is applied to this, otherwise a significant drop in pressure and temperature of the hot air or the hot gas relative to the Pressure and the temperature directly at the outlet of the nozzle and also an admixture of cold ambient air is determined by the required heating of the edge strip or the heat-activatable layer is made difficult or impossible.

If this is observed, feed rates can be achieved when coating the narrow sides of workpieces that lie in the range of 1-20 m / min or more and thus also allow an economical coating. Due to its size, this device is also suitable for use on machining centers for processing molded parts.

However, it has also been found that the inventive application of the hot air or the hot gas can improve the use of edge strips, in which between the narrow surface of the workpiece and edge strips a heat-activatable hot melt adhesive is arranged, for. B. is applied in advance on the edge strip or the narrow surface of the workpiece or is. This is usually the hot melt adhesive on the narrow surface of the workpiece (or in rare cases on the edge strip) z. B. applied by a film-like application of an applicator. On the way between the actual contact pressure of the edge strip upstream application zone for the hot melt adhesive and the contact point of the edge strip cools the hot melt adhesive again something, z. B. by the heat dissipation in the much cooler workpiece. The hotmelt adhesive therefore usually no longer has the optimum viscosity at the time of contact of the edgeband, so that the adhesion of the already solidifying hotmelt adhesive may result in reduced adhesion values and sticking edges remaining visible after the gluing. If, in the manner according to the invention, hot air or hot gas is applied to the edge strip or to the narrow surface of the workpiece or to the hotmelt adhesive during the entire period between application of the hotmelt adhesive and pressing of the edge strip or shortly before the first pressure roller in the described manner, then it remains Edge strips warm and thus the hot melt adhesive as required thin and can penetrate even deeper into the often porous substrate of the workpiece and anchor there. Also, the thickness of the hot melt adhesive between the edge strip and the narrow surface of the workpiece is very low due to the ongoing heating of high viscosity of the hot melt adhesive, so that a design of the joint with a conventional hot melt adhesive between edge strip and narrow surface can be achieved, the so-called. Zero joint of the Laser or plasma activation comes very close. In addition, the durability of the bond is improved by the thin joint of the hot melt adhesive and its deep penetration into the workpiece plate and its good networking with the narrow surface. It is advantageous in this case if the hot air or hot gas is directed in the section between hot melt application and pressing the edge strip so that in this section the edge strip or the narrow surface of the workpiece and thus the applied adhesive remains tempered. This can be done for example by aligning the flow of hot air or of the hot gas parallel or perpendicular or at another angle to the longitudinal extent of the edge strip or the narrow surface of the workpiece.

It is particularly advantageous if the outlet for the hot air or the hot gas is designed in the form of a nozzle with a narrow outlet slot or a plurality of small nozzle openings, the uniformly on the hot air or the hot gas over the entire width of the edge strip or the narrow surface of the workpiece the edge strip and / or the heat-activatable layer of the edge strip or the narrow surface of the workpiece inflates. Such a nozzle allows a very targeted application of the generated hot air or the hot gas on the edge strip or its heat-activatable layer or the narrow surface of the workpiece, over the entire width of the edge strip or the narrow surface of the workpiece uniform heating conditions of the heat-activatable layer of the edge strip or ., The narrow surface of the workpiece can be achieved. In addition, such a nozzle accelerates the volume flow of the exiting hot air or the hot gas in addition, so that the exit velocity and thus the impact velocity of the hot air or the hot gas on the edge strip or its heat-activatable layer or the narrow surface of the workpiece and thus the impact pressure compared to at the edge coating conventional hot air generation can be greatly increased. Thus, the edge strip and the narrow surface of the workpiece is punctiform or linearly heated for a short moment briefly and the heat-activatable layer safely melted so that it can be pressed well and firmly to the narrow surfaces of the workpiece and fastened there. At the same time, only through short-term and strong heating of the edge strip in the Einwirkbereich the outlet for the hot air or the hot gas not heat-activatable layer of edge strip not inadmissible and above all not heated with optically visible effects and thus retains its desired technical and optical properties. In a further embodiment, it is conceivable that the outlet for hot air or hot gas is arranged and aligned such that the hot air or hot gas escapes in the direction of the workpiece and / or the contact zone for the edge strip on the narrow surface. Thus, the edge strip can be tempered over a longer section directly from the contact point of the edge strip and either the heat-activatable layer of the edge strip or the separately applied hot melt adhesive optimally adjusted for the production of the bond.

In another embodiment, it is also conceivable that the outlet for the hot air or the hot gas is formed as an arrangement of a plurality of nozzles or adjustable nozzles, the hot air or the hot gas over the entire width of the edge strip and / or the narrow surface of the workpiece or parts thereof inflates on the edge strip and / or the heat-activatable layer of the edge strip and / or the narrow surface of the workpiece. Here, different arrangements of the individual nozzles can be applied by the hot air or the hot gas is applied when using different width edge strips only in the region of each edge strip to be processed and / or the narrow surface of the workpiece and individual side nozzles are turned off by the the edge strip would not be heated at all. This helps to reduce the amount of hot air or hot gas needed for narrower edge strips. It is conceivable z. B. that the nozzle has a narrow outlet slot or a number of adjacently arranged outlet holes.

It is of considerable advantage if the hot air or the hot gas impinges on the edge strip and / or the heat-activatable layer of the edge strip under elevated pressure, which is higher than the pressure which can be ensured with known hot air blowers. This increased pressure, which usually results primarily from a large flow rate of the hot air or the hot gas in conjunction with the feed rate, contributes to a particularly effective heating of the heat-activatable layer of the edge strip and / or the narrow surface of the workpiece, so that the heat-activatable layer melt at temperatures that avoid interference with the other layer of the edge strip. In this case, the hot air or the hot gas can impinge on the edge strip and / or the heat-activatable layer of the edge strip under a pressure of more than one bar, preferably more than two bar, relative to the atmospheric pressure.

The increased pressure of the blown on the edge strip hot air or hot gas can advantageously be achieved in that the supplied air is already injected under pressure, preferably of more than two bar relative to the atmospheric pressure in the heating device. As a result, unavoidable flow losses on the way through the heating device are compensated and, on the other hand, a turbulent flow is generated by the heating device, which allows a particularly good heat transfer to the hot air or the hot gas to be generated. Thus, the injected under increased pressure in the heating device air is particularly suitable to cause the heat activation of the edge strip. The air or gas blown into the heating device may originate, for example, from an external compressed air generator such as a compressor or the like. Alternatively or additionally, an air-conveying device, preferably a fan, may be arranged in or on the heating device.

Especially for the use of the edge coating device in the more artisanal field, but also in the industrial sector and for mobile coating devices, it is advantageous if the heating device is space-saving, in particular below or above or laterally or in front of or behind the feed device and the pressing device. As a result, the heating means is in the vicinity of the outlet for the hot air or the hot gas, whereby a cooling of the hot air or the hot gas on the way from the heating means to the outlet can be avoided or greatly reduced. At the same time, however, this arrangement of the heating device does not hinder the handling of the workpiece and edge strips in the region of the edge coating device and the machine operator can work spatially unhindered by the heating device on the edge coating device as usual. For stationary or larger mobile coating devices, the heater can of course also elsewhere, for. B. are arranged laterally outside the work area, if the fluidic connection between the heating device and outlet and a corresponding thermal insulation of this connection is ensured, so that the hot air or the hot gas do not cool down too much on the way to the nozzle.

In an advantageous embodiment, it is conceivable that the heating device preferably a meandering or circular of outwardly inwardly or reversely extending gas or air guide in the form of successively flowed through heat exchanger elements, in which sucked from the environment or under pressure, for. B. with two bar or more blown air is brought directly or indirectly into contact with heating elements and heat this air or gas to the hot air or hot gas. Such heat exchanger elements may be formed, for example, by tube bundles parallel to one another in sections, which are arranged adjacent to at least one heating element or another tube and deliver the heating energy of the heating element to the air flowing through the tube bundles. Also conceivable are air-permeable sintered plates with heating elements. Such heating devices can be put together inexpensively and based on conventional units and thus produced at low cost. It is of course also conceivable that different types of heat exchangers or heating elements are used, so can be used electrically or by gas heated heating elements. Also, the air flow within the heater can be designed differently than meandering, so is merely an example of a more circular arrangement of the air duct z. B. circular from outside to inside or vice versa conceivable. When using a meander-shaped arrangement of the air duct, it is conceivable that between the preferably sectionally parallel tube bundles overflow areas are arranged, in which the heated hot air or the hot gas flows into the subsequent tube bundle of the subsequent heat exchanger in the flow direction.

It is advantageous, in particular with regard to the effectiveness of the heat transfer to the hot air or the hot gas, if the heating device is designed to be thermally insulated from the environment. As a result, the heating device can be heated to near storage at times when no hot air or hot gas is required, so that a corresponding amount of heat is available when hot air is required, which also means a longer coating process of the edge coating device without dips in the supply with hot air or hot gas possible. In the heating device so that a required amount of heat is virtually stored in stock, which then allows a very fast and usable over a longer period retrieval of this heat when coating the narrow surfaces of a workpiece. For this purpose, the heating device can be overheated even during times in which no hot air or hot gas is needed, and then additionally serves as quasi heat storage, from which large quantities of hot air or hot gas with high volume flow can be retrieved. It is also advantageous with regard to safety at work if the heating device is protected by insulation, for example in the form of insulation materials such as rockwool, glass wool or the like, so that open hot surfaces of the heating device are not present and can lead to burns of the operating personnel.

The invention further describes a method for applying a strip-shaped edge strip on narrow surfaces of a workpiece, wherein the edge strip, in particular multi-layer adhesive or with a melt adhesive layer between edge strip and narrow surface, heat-activated is attached to the narrow surfaces, by means of an edge strip feeder and a pressing device, the presses the heat-activated edge strip against the narrow surface of the workpiece. In this method, hot air or hot gas is applied under pressure to the edge strip and / or the heat-activatable layer of the edge strip in the region of the feed device and / or pressing device, wherein the hot air or the hot gas from a heating device at least to the required activation temperature for the heat-activatable layer of the edge strip or the hot melt adhesive is brought. In this case, the hot air or the hot gas can be blown in particular under elevated pressure relative to the atmospheric pressure on the edge strip and / or the heat-activatable layer of the edge strip. Thus, the hot air or hot gas can advantageously impinge on the edge strip and / or the heat-activatable layer of the edge strip under a pressure of more than one bar, preferably more than two bar, relative to the atmospheric pressure.

Furthermore, it is conceivable that the effect of the hot air or the hot gas when hitting the edge strip and / or the heat-activatable layer of the edge strip by influencing the volume flow and / or the temperature and / or pressure of the hot air or the hot gas and / or the feed rate of the edge strip when coating the narrow surface is regulated. By influencing the manipulated variables volume flow and / or temperature and / or pressure of the hot air or the hot gas and feed rate of the edge strip during coating and their interaction during the coating process, a desired degree of heat activation of the heat-activatable layer of the edge strip can be achieved by melting the heat-activatable layer, the dependent z. B. the flexibility of the edge strip, the material and the properties of the heat-activatable layer allows optimal bonding of the edge strip on the narrow surface of the workpiece.

A particularly preferred embodiment of the edge coating device according to the invention is shown in the drawing.

Show it:

1 A schematic plan view of an edge coating device according to the invention,

2 - Schematically represented interaction of the essential components of the edge coating device between the heating device and edge strips in the coating of workpiece surfaces.

In 1 is a schematic plan view of an edge coating device 1 for applying an edge strip 4 on a narrow surface 6 a workpiece 5 according to a preferred embodiment of the present invention.

The edge coating device according to the invention 1 has a carrier 2 on, which is formed in this embodiment substantially plate-shaped. On the carrier 2 are a feeder 7 for the continuous supply of the edge strip 4 , a first pressure roller 8b , a feed roller 8a , a pinch roller 9 , an outlet 10 for hot air 16 and a cutting device 11 arranged. The feed roller 8a , the pressure roller 8b and the pinch roller 9 are each rotatably mounted. The feeder 7 includes a guide rail, not shown here in detail, along which the edge strip 4 is guided in the feed direction.

The feeder 7 is designed to be the edge strip 4 the narrow surface 6 at an acute angle relative to the feed direction of the workpiece 5 supplies. The pressure roller 8b stands with the edge strip 4 within the feeder 7 in operative connection and provides in the feeder 7 for its continuous supply in the transport direction. Furthermore, an additional feed roller 8a provided, the pressure roller 8b is arranged opposite in the manner that the supply device 7 in sections between the pressure roller 8b and the feed roller 8a runs. The feed roller 8a ensures safe guidance of the edge strip 4 in the feeder 7 ,

In the feed direction behind the guide roller 8a is an outlet 10 for hot air 16 or the hot gas arranged in such a way that from the outlet 10 flowing hot air 16 or the hot gas substantially onto the heat-activatable layer of the edge strip 4 and / or the narrow surface of the workpiece is directed. This heat-activatable layer is usually a thermoplastic, usually co-extruded, post-coextruded or subsequently coated material or hot-melt adhesive, which is activated by heat supply at a specific temperature by melting, so that the edge strip 4 on the narrow surface 6 of the workpiece 5 can stick.

Further, viewed in the feed direction behind the outlet 10 for the hot air 16 or the hot gas a pinch roller 9 provided, which is designed so that the edge strip 4 is bent in the feed direction in such a way that it is substantially parallel to the narrow surface 6 of the workpiece 5 accurately aligned. During manual or mechanical feed of the workpiece 5 always acts a force component perpendicular to the feed direction in the direction of the edge coating device 1 , This will between the narrow area 6 of the workpiece 5 , the edge strip 4 and the pinch roller 9 creates a contact pressure to form an adhesive bond between the narrow surface 6 and the edge strip 4 manufacture.

Finally, in the present embodiment is still a manually operable, pivotable about a rotation axis hinged cutting device 11 intended. A cutting surface of the cutting device 11 is arranged so that they at a manual actuation of an actuating lever of the cutting device 11 the edge strip 4 approximately in a section between the feed roller 8a and the outlet 10 severed transversely to the transport direction. Manual operation of the cutting device 11 thus allows the edge strip 4 cut sufficiently accurately, so that the edge strip 4 end the narrow surface 6 of the workpiece 5 essentially flush.

Below the carrier 2 is the heating device 3 arranged in unspecified manner such that the path of the hot air generated 16 to the outlet 10 is short and at the same time the heating device 3 the operation and use of the edge coating device 1 not handicapped further. The heating device 3 can be thermally insulated by the heating device 3 completely in a insulating material such as glass wool, rock wool or the like. Is packed.

The outlet 10 the edge coating device 1 for in the heating device 3 generated hot air 16 or the hot gas is advantageously formed as a slot nozzle, which has a longitudinal narrow outlet for the hot air 16 or the hot gas forms. The nozzle can also consist of several small nozzle openings. This slot nozzle or nozzle arrangement of individual nozzles ensures a uniform distribution of the hot air 16 or the hot gas over the entire width of the edge strip 4 as well as an additional Acceleration of the hot air 16 or the hot gas when hitting the edge strip 4 ,

In the 2 is a schematic representation of the interaction between heating device 3 and edge strips 4 in the coating of workpiece surfaces 6 to recognize. From the environment z. B. via a fan, not shown, or the like sucked or from a compressed air source, also not shown in the heating device 3 fed air 12 is in the heating device 3 not shown heat exchanger elements, for. B. parallel tube bundle or sintered material embedded therein heating element, for. B. electrical or gas-powered heating element, brought into contact with the heat and heated to about 400-700 ° C. After passing through the heating device 3 enters this hot air 16 or the hot gas through the slit-shaped outlet 10 towards the edge strip 4 and / or the narrow surface of the workpiece and heats the heat-activatable layer of the edge strip 4 and / or the narrow surface of the workpiece in the manner already described. By the principle known effect of the edge coating device 1 becomes the edge strip 4 to the narrow surface 6 of the workpiece 5 pressed and glued on cooling with this narrow surface 6 ,

LIST OF REFERENCE NUMBERS

1

Kantenanleimvorrichtung

2

carrier

3

heater

4

edgebandings

5

workpiece

6

narrow surface

7

feeder

8a

leadership

8b

feed roll

9

pinch

10

outlet

11

cutter

12

air supply

13

heat

14

attack

15

Workpiece support

16

Hot air / hot gas

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1163864 B1 [0004]
• EP 1852242 B1 [0004]
• EP 1800813 A2 [0005]
• DE 202009009253 U1 [0005]

Claims (18)

Edge coating device ( 1 ) for applying a band-shaped edge strip ( 4 ) on narrow surfaces ( 6 ) of a workpiece ( 5 ), whereby the edge strip ( 4 ), in particular multi-layer adhesive-free or with a melt adhesive layer between edge strips ( 4 ) and narrow surface ( 6 ), heat-activatable on the narrow surfaces ( 6 ) is fastened, comprising at least one supply device ( 7 ) for the edge strip ( 4 ) and a pressing device ( 9 ), which the edge strip ( 4 ) to the narrow surface ( 6 ) of the workpiece ( 5 ), characterized in that in the region of the supply device ( 7 ) and / or pressing device ( 9 ) an outlet ( 10 ) for hot air or hot gas ( 16 ) is arranged, which the hot air ( 16 ) or the hot gas under pressure on the edge strip ( 4 ) and / or the heat-activatable layer of the edge strip ( 4 ) and / or the narrow surface ( 6 ) of the workpiece ( 5 ), with the outlet ( 10 ) in fluid communication for the hot air ( 16 ) or the hot gas standing a heating device ( 3 ) is provided, which the hot air ( 16 ) or the hot gas at least to the required activation temperature for the heat-activatable layer of the edge strip ( 4 ) or hot melt adhesive and the hot air ( 16 ) or the hot gas under elevated pressure relative to the atmospheric pressure on the edge strip ( 4 ) and / or the heat-activatable layer of the edge strip ( 4 ). Edge coating device ( 1 ) according to claim 1, characterized in that the edge strip ( 4 ) multi-layered and adhesive-free heat-activatable as an at least two-layer coextruded or postcoextruded or subsequently coated edge strip ( 4 ) is trained. Edge coating device ( 1 ) according to claim 1, characterized in that the edge strip ( 4 ) one or more layers and as an adhesive with a heat-activated hot melt adhesive edge strip ( 4 ) is trained. Edge coating device ( 1 ) according to one of claims 1 to 3, characterized in that the outlet ( 10 ) for the hot air ( 16 ) or the hot gas is designed in the form of a nozzle with a narrow outlet slot or a plurality of small nozzle openings, the hot air ( 16 ) or the hot gas over the entire width of the edge strip ( 4 ) evenly on the edge strip ( 4 ) and / or the heat-activatable layer of the edge strip ( 4 ) and / or the narrow surface of the workpiece inflates. Edge coating device ( 1 ) according to claim 4, characterized in that the outlet ( 10 ) for hot air or hot gas ( 16 ) is arranged and oriented such that the hot air or the hot gas ( 16 ) in the direction of the narrow surface ( 6 ) of the workpiece ( 5 ) and the pressure zone ( 9 ) for the edge strip ( 4 ) on the narrow surface ( 6 ) escapes. Edge coating device ( 1 ) according to claim 4, characterized in that the nozzle has a narrow outlet slot or a number of adjacently arranged outlet bores. Edge coating device ( 1 ) according to one of the preceding claims, characterized in that the outlet ( 10 ) for the hot air ( 16 ) or the hot gas is formed as a, preferably adjustable in width, arrangement of a plurality of nozzles or adjustable nozzles, the hot air ( 16 ) or the hot gas over the entire width of the edge strip ( 4 ) on the edge strip ( 4 ) and / or the heat-activatable layer of the edge strip ( 4 ) inflates. Edge coating device ( 1 ) according to one of the preceding claims, characterized in that the hot air ( 16 ) or the hot gas under a pressure of more than one bar, preferably more than two bar relative to the atmospheric pressure on the edge strip ( 4 ) and / or the heat-activatable layer of the edge strip ( 4 ). Edge coating device ( 1 ) according to one of the preceding claims, characterized in that the supplied air ( 12 ) or the gas under pressure, preferably more than two bar relative to the atmospheric pressure in the heating device ( 3 ) is inflatable. Edge coating device ( 1 ) according to one of the preceding claims, characterized in that in or on the heating device ( 3 ) an air-conveying device, preferably a fan or a compressor or the like. Is arranged. Edge coating device ( 1 ) according to one of the preceding claims, characterized in that the heating device ( 3 ) space-saving, preferably below or above or laterally or in front of or behind the feed device ( 7 ) and the pressing device ( 9 ) is arranged. Edge coating device ( 1 ) according to one of the preceding claims, characterized in that the heating device ( 3 ), preferably meander-shaped or circular from outside to inside or vice versa, air duct in the form of successively flowed through the heat exchanger elements, in which sucked from the environment or under pressure injected air ( 12 ) or the gas directly or indirectly in contact with heating elements ( 13 ) and the air to the hot air ( 16 ) or to heat up the hot gas. Edge coating device ( 1 ) according to claim 12, characterized in that the heat exchanger elements are formed by sections of mutually parallel tube bundles or air-permeable sintered plates, which adjacent to at least one heating element ( 13 ) or another tube bundle or other sintered plates are arranged and the heating energy of the heating element ( 13 ) to the air flowing through the tube bundle or the sintered plates ( 12 ) or release the gas. Edge coating device ( 1 ) according to claim 13, characterized in that between the preferably sectionally mutually parallel tube bundles overflow areas are arranged, in which the heated hot air ( 16 ) flows in the subsequent tube bundle of downstream in the flow direction heat exchanger. Edge coating device ( 1 ) according to one of the preceding claims, characterized in that the heating device ( 3 ) is thermally insulated from the environment. Edge coating device ( 1 ) according to one of the preceding claims, characterized in that the heating elements ( 13 ) can be heated electrically or by means of fluid media, preferably by means of gas. Edge coating device ( 1 ) according to one of the preceding claims, characterized in that the effect of the hot air ( 16 ) or the hot gas when hitting the edge strip ( 4 ) and / or the heat-activatable layer of the edge strip ( 4 ) by influencing the volume flow and / or the temperature and / or the pressure of the hot air ( 16 ) or the hot gas and / or the feed rate of the edge strip ( 4 ) when coating the narrow surface ( 6 ) is controllable. Edge coating device ( 1 ) for applying a band-shaped edge strip ( 4 ) on narrow surfaces ( 6 ) of a workpiece ( 5 ), whereby the edge strip ( 4 ), in particular multi-layer adhesive-free or with a melt adhesive layer between edge strips ( 4 ) and narrow surface ( 6 ), heat-activatable on the narrow surfaces ( 6 ) is fastened, comprising at least one supply device ( 7 ) for the edge strip ( 4 ) and a pressing device ( 9 ), which the edge strip ( 4 ) to the narrow surface ( 6 ) of the workpiece ( 5 ), characterized in that in the region of the supply device ( 7 ) and / or pressing device ( 9 ) an outlet ( 10 ) for hot air or hot gas ( 16 ) is arranged, which the hot air ( 16 ) or the hot gas under pressure on the edge strip ( 4 ) and / or the heat-activatable layer of the edge strip ( 4 ) and / or the narrow surface ( 6 ) of the workpiece ( 5 ), with the outlet ( 10 ) in fluid communication for the hot air ( 16 ) or the hot gas standing a heating device ( 3 ) is provided, which the hot air ( 16 ) or the hot gas at least to the required activation temperature for the heat-activatable layer of the edge strip ( 4 ) or the hot melt adhesive, wherein the supplied air ( 12 ) or the gas under pressure, preferably more than two bar relative to the atmospheric pressure in the heating device ( 3 ) is inflatable.

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