FI58089C - FRAMEWORK FOR THE FRAMEWORK OF THE FRAME STOCK FAST VID VARANDRA BUNDNA BANOR - Google Patents

Abstract

1437542 Laminating apparatus WEGU GUMMI-UND KUNSTSTOFFWERKE WALTER DRABING KG 22 June 1973 [2 Dec 1972] 25610/74 Divided out of 1437541 Heading B5N An apparatus for bonding at least two sheet materials in selected areas thereof comprises a metal pressing plate 10 which is adapted to be heated and which is provided with a plurality of projecting surfaces, and a wooden bed plate 11, e.g. of plywood having a substantially planar so that when sheets to be bonded are pressed between said pressing plate and bedplate bonding is effected only in selected areas determined by the positions of said projecting surfaces. The apparatus may be used in carrying out the method of Specification 1,437,541.

Description

2 58089

In addition, care must be taken to ensure that the powder layer is not damaged. Despite all this, the waste in manufacturing is relatively large.

Another known method starts from providing connecting areas on the substrate, which in turn provide a connection between the two webs of material. Also in this case, it was necessary to powder coat the surfaces of the webs of material between the joint areas, in order to prevent the webs of material from sticking together. The disadvantages of this manufacturing method are the high material and labor costs in manufacturing and the fitting of partitions, i.e. nets.

It is an object of the present invention to provide a method according to which adhesive-coated webs of material can be joined together at certain points in a durable manner under the influence of pressure and heat without the need for the use of powder or complex joints. This is achieved according to the invention in that the application of the separating layer is also carried out over the attachment points by placing a thin gauze flow extending over the entire surface of the web between the layers and that the fastening points are carried out by pressing rubber or adhesive through the gauze. In the case of gauze, a flexible, porous surface structure is involved, which, possibly after mechanical (e.g. nailing) pre-reinforcement, is glued together by gluing, dissolving, welding or a combination of these methods. Such gauze sheds consist of mixed thin private fibers and can be natural fibers (wool, cotton, etc.), semi-synthetic fibers, (bridge-acetate fibers) or fully synthetic fibers (polyamide, polyester, polyacrylonitrile, polyethylene, polyethylene, and polypropylene fibers). The method of forming a gauze is not the subject of the present invention.

Most preferably, a bridge-viscose gauze with a very small thickness, sold under the trade name "Viledon", is used in the process according to the invention. Its thickness corresponds to a weight of 25-30 g / m. Suitably, a fiber flow is arranged on one side of the rubber-coated material webs to be joined together and this is arranged together with the gauze flow immediately on the rubber-coated side of the second material web, after which the seams are already hot-pressed. The intermediate gauze then has two functions. It forms an active release agent between the loose superimposed rubber-coated material surfaces, which prevents their undesired incorporation. Secondly, this becomes completely penetrated by the adhesive and rubber exx in the area of hot pressing, i.e. in the area of the seams and edges, whereby at the same time it provides a considerable reinforcement of the seams and edges, whereby the tear strength increases. Finally, the permeability of the low-thickness gauze and the mixed fiber structure do not affect the tightness of the seams and edges.

Particularly preferably, the bridge-viscose gauze * 50/50 (viscose and bridge portion) is used with a unit weight of about 25 to 30 g / m 2, the hot pressing taking place in a manner known per se at a pressure of about 10 kp / cm and a temperature of 180 ° C.

One particularly advantageous manufacturing method, which can also be used with similar success in known manufacturing methods in which a powder layer or interlayers are used instead of gauze, is such that hot-pressing of the interconnected webs is carried out until the adhesive or rubber coating is extruded laterally in the press tool. to form a bellows covering the gap between. The device for applying the method is preferably such that the pressing tool is formed in a manner known per se from a metal heatable pressing plate and as such a strong but elastic flexible pressing base made of wood, in particular cross plywood. Inflatable or inflatable articles made by the method according to the invention, such as air mattresses, pillows, inflatable boats or the like, or also assembled liquid tanks, gutters, etc., are characterized in that the webs of material overlapping their rubber-coated surfaces is arranged with a thin fiber gauze flow extending over its entire surface. On the other hand, the inflatable articles, whether made by the powder or interlayer method, have a bellows formed by an adhesive or rubber coatings of the webs running along the seam or edge, covering the gap between the webs and thus tightly closing.

The idea of the invention, which includes various application possibilities, is described in the accompanying drawings, in which:

Figure 1 is a diagram of the air mattress seen from above, «58089

Figure 2 is a perspective view of the superimposed material webs,

Figure 3 schematically shows a crimping tool and

Figure 4 is a section of two rubber-coated and hot-compressed webs of material.

In the application of the method according to the invention, webs of material are used, for example a textile web 1, which on one side is provided with rubber 2. These webs of material, as can be seen from Figure 2, are arranged on top of each other on the workbench 3.

In this case, a thin fibrous gauze stream 4 is arranged between the two webs of material, which is a mixture of overlapping natural or man-made fibers or the like. This gauze 4 is, for example, a bridge-viscose flow. o The passport is called "Viledon" and owns a unit plant of about 28 - 30 g / m.

This flow extends over the entire surface of the webs of material and essentially forms a separating layer which prevents the still unvulcanized webs of material from sticking together.

Finally, in the hot press, the webs of material 1, 2 are joined together with gauze 4 throughout and admittedly only in a certain area, as can be seen, for example, from the description according to FIG. This is achieved by using a heated press plate corresponding to the representation * shown in Fig. 1 and having raised edge surfaces 5 and seam surfaces 6 and 7 and 8. The edges 5 and the seams 6-8 are arranged so that they are not inside the edges 5 between them. surface portions 9, inside which no connection of overlapping webs of material takes place. In the blowing of the air mattress parts, ordinary air chambers are formed between the seams 6, 7 and 8 inside the edges S.

In hot pressing, carried out at a pressure of about 10 aty and a temperature of about 180 ° C, the rubber material 2 penetrates through the gauze 4 in the areas of the edges 5 and the seams 6, 7 and 8 so as to form a tight and effective connection of the webs.

On the other hand, hot pressing is expediently continued between the metal press plate 10 and preferably the cross plywood press base 11 to such an extent that, according to Figures 3 and 4, the rubber 2 protrudes laterally to a certain extent and forms a groove along the pressing surface. The rubber web 2 to be glued to the textile web 1 passes a thread over the bead 12. This ball i :: buy a backing support against tearing of the seams and replaces the pleated strips normally used for this purpose.

Figure 4 shows a section of the seam and clearly shows the adhesive bellows 12 and Kurri it us 2 and the gauze flow H, which is easily associated with the rubberization of the second web of material 2.

thanks if in manufacture only one web of material is coated with hur-sovoda 4. Naturally, however, for reasons of simplicity, both webs of material may also have a coating gauze. It is clear from Figure 4 that in the area of the extrusion tool the rubber 2 is thoroughly extruded through the gauze leakage 4 and in a certain amount it is sealed and is part of the extrudate extruded laterally to form the bellows 12.

The article prepared after the pressing is vulcanized as usual and the vulcanization time on air mattresses or the like is about 20 minutes, the temperature 140 ° C and the pressure about 3 aty.

Naturally, the pressing times, pressing temperatures and vulcanization values can be adapted to the products to be manufactured.

Claims (5)

58089 6 A method of making permanently bonded stakes in a method, wherein the webs to be joined together are coated on their opposite surfaces with rubber or adhesive and, prior to juxtaposition between the two layers, the separating layer is applied to the non-bonded areas and the webs are joined together. and heat at the attachment points, characterized in that the application of the separating layer is also performed over the attachment points by placing a thin gauze flow extending over the entire surface of the web between the layers and in the attachment points by pressing rubber or adhesive through the gauze. Process according to Claim 1, characterized in that the rubber or adhesive is pressed through the gauze bed at a pressure of 10 kiloponds / cin at a temperature of 180 ° C. A method according to claim 1, characterized in that the pressing of the rubber or adhesive through the gauze flow is performed until the rubber or adhesive starts to penetrate out of the attachment point. Process according to one of the preceding claims 1 to 3, characterized in that a 50/50 bridge viscose flow with a unit weight of about 25 to 30 g / m 3 is used as the gauze. Pressing tool for carrying out the method according to claim 3, which tool consists of a heatable metal pressboard with ribs at the attachment points and a press base, characterized in that the press base (11) consists of a rigid, in itself elastically retractable wood board, in particular a plywood board.