DE7216028U - Device for joining two workpiece parts made of fabric, leather and similar materials - Google Patents

Description

BIMA machine factory limited liability company

745 Hechingyin / Hohenzollern

Neue Rottenburger Str. 37

'' Device for joining two workpiece parts made of fabric, Leather and similar materials ^

The innovation relates to a device for joining workpiece parts made of natural or synthetic Materials, especially those that on the one hand cannot be welded to one another by means of high frequency and on the other hand by the permeation temperature required for bonding together for activation the applied adhesive would be destroyed,

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As is well known, workpieces are made of synthetic materials welded together by their hands to connect. For this purpose, a foil strip is inserted between the points to be connected, which is liquefied by high-frequency storage and in cooperation with workpiece parts made of a synthetic material, these are welded together. Due to the high frequency effect, the welding point liquefies, but without affecting the material and thus the workpiece itself would be damaged. For materials that cannot be sealed using high frequency, such as natural leather, fabrics and the like, these must be with conventional heat sources, such as. B. Heating by electric heating cartridges and the like, to activate an adhesive film with heat. The relatively high enforcement temperature required for this is, however, would destroy these materials, se that 3in economical joining of such ./workpieces after how must be made before by suturing.

The task of the innovation is now a device for connecting of workpiece parts made of non-sealable materials on the one hand the advantages that a traditional welding offers, are given, but without the Nadateile an enforcement of the material with that for the Activation of the adhesive required thermosetting temperatures would have to be accepted.

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According to a proposed method for connecting two Material parts made of fabric, leather and the like. Natural or synthetic materials, the adhesive layer is pressed onto the surface of one of two workpieces to be joined under the action of heat from a carrier coated on one side with adhesive now freed of adhesive carrier, the other workpiece is placed with part of its surface on the workpiece coated with adhesive and both workpieces lying one on top of the other are pressed together at the connection points by means of a ram. The compression is preferably carried out under the action of heat, in which case it is too large to avoid it Heating and thus destruction of the workpiece between ässsen Surface and the lower surface -rs press ram of the empty one Porter comes to rest.

According to the innovation, the device for carrying out this method consists of a workbench, a in the axial direction towards the work table and away from it, a press ram, one in the area of the press ram on one side provided, also in the axial direction towards and away from the workbench Riederhalteansohlag and at least one in the area of the ram opposite the hold-down stop, in the surface of the workbench retractable stop and a tape-shaped adhesive carrier awisohen Preßstempelunterfläohe and workbench surface lead & d feed device. The advantage here is the

Niederhaiteanschleg can be guided diagonally on the workbench, see above that its axis form an angle with the axis of the ram. In this way it is only possible to see what isiederhel + «saw was exactly in the pressure range of the press ram a to lead, so that a perfect, immovable workpiece support given is. In order to prevent a hold-down stop, which may be pushed too close, the ram in could block its downward movement, the hold-down stop is advantageously designed in two parts, with the actual Hold-down part is attached pivotably spring-biased at the free end of the axially movable piston. To achieve a flawless stop edge is the table-side end üäcii angled down, se that it is in the position of use essentially perpendicular to the surface of the workbench is.

In the case of the feed device for the tape-shaped adhesive carrier So it is essential to see that the pulleys on the one hand are arranged in such a way relative to the press ram that the tape-shaped adhesive carrier between presses + «mpelunterfläche and the workpiece surface is guided and, on the other hand, at least one deflection roller is spring-loaded in such a way that that the tape-shaped adhesive carrier to the relative movements of the press ram to the workbench surface or therefrom again able to follow away.

The innovation is based on the drawing, in which an execution

7216O28-4.io.73

of which is shown, illustrated in more detail

Show it:

Fig.

Fig. 2

a device in a schematic representation in front view,

the device according to FIG. 1 in side view and the

Fig. 3-5 the sequence of the most important

Functions when connecting two workpieces according to the innovation Process, shown schematically.

In Fig. 1 is a work table 1 with a press ram 2 arranged above, which is, for example, hydraulic or pneumatic controlled by means of a pressure cylinder 3 via a plunger piston 4 in the axial direction X-X essentially perpendicular can be moved towards and away from the worktable 1. In the area of the ram there is a hold-down stop on one side 5 is provided, which in the same way as the ram by means of a pressure cylinder and a piston in axial direction Y-Y at an angle to the axis of the press ram running towards the work table and away from it again is movable away. Opposite the hold-down stop, also still in the area of the ram 2, are in the Surface 6 of the worktable 1 stop pins 7 arranged to be retractable. The stop pins are here by means of Springs 8 pressed outwards over the workbench surface. The device also has a feed device for a tape-shaped adhesive carrier, which consists of the actual carrier body 10 and the one-sided

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carried adhesive ilia 11, which is guided between the lower surface of the ram 12 and the surface of the workbench 6. The hold-down stop is in two parts and is composed of the piston, which can be moved in the axial direction YY towards the table, and a hold-down part 13 which is pivotably attached to it at its free end. The hold-down device is spring-biased towards the piston by means of a compression spring 14. Its end 13 on the table side is angled downwards so that in the position of use it is directed essentially perpendicularly onto the workbench surface. The device S, Pig. 2, has a supply roll 16 for the tape-shaped adhesive carrier 10, 11, from which it is drawn off by a motor 19 via deflection rollers 17, 18, and 18a and wound onto a rewinding roller 20 as a non-adhesive carrier = the deflection rollers are arranged in this way that the adhesive carrier on the one hand passed between the press ram lower surface and the work table surface 6 and on the other hand can follow the axial movements of the press ram towards and away from the work table. For this purpose, the deflection rollers 17, 18 are assigned to the outside, ie facing away from the device, spring-preloaded adhesive carrier tensioning levers 21 and 21a, respectively, which hold the tape-shaped adhesive carrier taut in every cut. The Umlenkrclle 18 a, however, is rotatable, but fixed immovably on the device.

The work table 1 is attached to a stand 22 of the device so as to be adjustable in height. The angle that the Y-Y axis

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of the hold-down impact 5 with the Ach.se X-X of the ram includes is adjustable in an adjustable hinge attachment 23.

The function of the device is as follows: For seamless joining of two workpieces, a workpiece 24 is first placed on the work table and having an edge 24a hinged to the stopper pin 7 then the heated ram entraining the intermediate adhesive carrier is lowered onto the workpiece ¹ IIId presses in its working position part of the adhesive carrier with simultaneous activation of the adhesive on the workpiece, so that the adhesive film 11 is transferred from the carrier body 10 to the surface of the workpiece 24. Then the ram lifts off the workpiece and returns, followed by the now adhesive-free carrier body, back to its starting position. As a further result, the hold-down aneoiilag 5 is moved down until an end on the table side is in contact with the workpiece 24, FIG. 4. In this, his working position he fixes the workpiece 24 on the work table and also forms a stop for another work piece 25 to be connected - as FIG is pushed to the hold-down stop. By a distance 27, which is to be measured by the distance of the hold-down pins 7 from the hold-down insole, the width of the connecting pieces for the

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two workpieces 24, 25 given. To connect these workpieces, the still hot press lever is lowered again onto the two workpieces lying one on top of the other, again taking along the now adhesive-free Carrier body, which now serves as a heat shield, around the two workpieces under pressure by means of the already activated one Adhesive to connect with each other. When lifting the ram the feed device 9 transports the tape-shaped adhesive carrier by a distance corresponding to the Distance 27 further, so that the device is ready for use for a new workpiece connection.

The extremely great advantage of this method and the device for carrying it out over the known types The main reason for joining workpieces is that for two completely different work processes such as transferring of the adhesive under the action of heat with simultaneous activation of a carrier body on a workpiece surface and pressing together the points to be connected by means of the adhesive that has already been activated for this purpose, for the too much heat on the surface of the work can be extremely damaging, nevertheless__ only one and the same tool is required.

Claims (6)

• “I t * t I · II 1111 I · ι: ι ι ι ι lit · Protection claims 1) Device for joining workpiece parts from no weldable fabrics, characterized by a workbench. (1), an overlying one that can be moved towards and away from the workbench in an axial view (X-X) Press ram (2), one provided in the area of the press ram on one side, also in axial direction (Y-Y) on the work table and back away from the hold-down stop ^, 5) and at least one in the area of the press pad opposite the hold-down stop, in the surface of the work table retractable stop pins (7) and a tape-shaped adhesive carrier (10, 11) between the lower surface of the press ram (12) and workbench surface (6) leading feed device (9). 2) Device according to claim 1, characterized in that the axis (X-X) öes hold-down stop with the axis Include (Y-Y) of the ram at an angle (). 3) Device according to claim 2, characterized in that the hold-down stop in two parts from an axially the work table movable piston and a spring-biased piston attached to it pivotably at its free end actual hold-down part consists. 721β028-4.Μι78 4) Device according to claim 3, characterized in that chnet the table end (15) of the Nisdar holder downwards is angled out and is essentially perpendicular to the surface (6) of the workbench. 5) Device according to claim 1 and some of the preceding claims, characterized in that the feed device (9) for the tape-shaped adhesive carrier from a storage full, at least one spring-loaded as well as a fixed, the stroke movements of the ram following deflection roller (17, 18 and 18 a) and consists of a motor with a winding roller, the deflection roller in the area of the tape-shaped adhesive carrier the lower surface of the PreSstempel between this and the workbench surface leads. 6) Device according to claim 5, characterized in that the spring tension the pulley from the work table after pushes towards the top or from the device towards the outside. 7218028-4.