DE1704872A1 - Method of manufacturing a multilayer board - Google Patents

Description

Method of making a multilayer board Die, Invention relates to a method of manufacturing an I-teaching sheet by Pressing a middle layer consisting of foam cores and on both sides Cover layers, with transverse webs being arranged between the cores.

Plates of this type have been produced so far that in a single Plastic housing injection molded, which roughly takes the form of large Own hollow bricks. The chambers in these housings are made up of the crossbars and formed by the two end plates which are perpendicular thereto. These chambers are foamed in with a plastic that has the necessary thermal insulation properties owns. Has this known method itself in several ways not proven. It implies increased costs for the production of such plastic housings in advance; It has also happened on various occasions that the foamed-in plastic layers become intact detach from the surrounding surfaces of the housing, thereby reducing the thermal insulation is questioned.

The invention shows a method which is simpler in structure and used in the production of cheap components and a perfect hold of the insulation in the chambers. This object is achieved according to the invention solved in that before gluing in the foam cores parallel to the transverse webs and incorporated grooves that are spaced apart and parallel to the The edges of the foam cores lying across the webs are provided with a bevel; that the surface facing the lower cover layer and the two perpendicular to it standing surfaces of the foam cores coated with adhesive and the foam cores placed one after the other on the lower cover layer with the interposition of the transverse webs that then the surface facing the upper cover layer of the Foam cores coated with adhesive in one operation and finally the upper cover layer is placed on the foam cores coated in this way.

The two exist in a further embodiment of the inventive concept Cover layers preferably made of glass fiber reinforced polyester. That The method according to the invention makes use of extremely simple components, namely Plates and crossbars, which can be produced in a relatively simple manner, quite in contrast to the conventional methods, which initially use hollow brick-like Molded structure and then the chambers must be foamed. Because the adhesive penetrates into the grooves of the foam cores and the cavity fills up at the joint of the transverse webs and the cover layers, the through the Adhesive connection is reinforced even further. The ones engaging in the grooves Adhesive strips represent anchors for the foam cores.

In the drawing, the rivet method according to the invention is a little closer illustrated. In this show in a purely schematic way: fig. 1 a vertical Section through a multilayer board produced by the method according to the invention FIG. 2 shows a view on an enlarged scale of the detail designated with A in FIG Fig. 3 is an isometric view of a Scha.umstoffkernes according to the invention Method made lyl teaching sheet. With 1 (Fig. 1) is the lower, with 2, however, denotes the upper cover layer, which for example consist of glass fiber reinforced polyester. There are also cross webs 3 provided, which with their end faces against the lower and upper cover layer 1 and 2, respectively prop up. Foam cores 4 to 6 are provided between these transverse webs 3, which ensure the required insulation of the multilayer board.

In these foam cores 4 to 6 grooves are first made on both sides, e.g. 4a, incorporated, which are parallel to the crossbars 3 and a certain Have a distance to each other. The parallel to the transverse webs 3 edges of the Foam cores 4 to 6 are provided with a bevel, e.g. 4b.

Then the foam core 4 is placed on top of that of the lower cover layer 1 facing surface and the surfaces lying parallel to the transverse webs 3 with Coated adhesive 7 which penetrates into the grooves, e.g. 4a, of the foam core 4 and also comes to rest on bevel 4b. The foam core 4 is then on the placed on the lower cover layer so that it adheres firmly to it.

Subsequently, the transverse web 3 is against that in Figure 1 of the drawing right lying surface of the foam core 4 pressed, so that a secure hold given is. The foam core 5 is then coated accordingly with adhesive 7 and placed on the lower cover layer 1. Then the cross web 3 moved so far on this foam core 5 that the crosspiece 3 on the with Adhesive-coated surface of this foam core 5 adheres. The process repeats then until the entire lower cover layer 1 with foam cores, e.g. ¢ to 6 is occupied. Then the surface facing the upper cover layer 2 becomes the foam cores, e.g. 4 to 6, coated with adhesive 7 and the top cover layer 2 brought into contact with this adhesive 7. Finally the multilayer board pressed and dried.

Claims (2)

Claims -1. Process for the production of a multilayer board by pressing a middle layer consisting of foam cores and cover layers on both sides, with transverse webs lying between the cores, the connection between these spaces and the cover layers being an adhesive connection, characterized in that prior to gluing into the foam cores (e.g. 4 ) incorporated parallel to the transverse webs (3) and spaced apart grooves (e.g. 4a) and the edges of the foam cores (e.g. q-) lying parallel to the transverse webs (3) are provided with a bevel (4b) so that those of the lower The surface facing the cover layer (1) and the two perpendicular surfaces of the foam cores (e.g. 4) are coated with adhesive (7) and the foam cores (4 to 6) are placed one after the other on the lower cover layer (1) with the interposition of the transverse webs (3) that then the surface of the foam cores (4 to 6) facing the upper cover layer (2) in one work Then coated with adhesive (7) and finally the upper cover layer (2) is placed on the foam cores (4 to 6) coated in this way. 2. The method according to claim 1, d a d u r c h g e k e n n -z e i c h n e t that the two cover layers (1, 2) are preferably made of glass fiber reinforced Are made of polyester.