FI64538C - FRAMEWORK FOR FOAM FRAME PROCESSING - Google Patents

Description

64538

Method of making a flexible plywood structure Förfarande för framställning av en böjlig flerskiktstruktur

The invention relates to a method for manufacturing a flexible plywood structure, which structure consists of loose parts of wood material or the like and a flexible film connecting them.

The object of the invention is to provide a flexible panel structure for doors or the like used in the carpentry or construction industry, for example, which is simple and inexpensive to manufacture and which meets the required quality requirements, especially in wood-based panels, for living with moisture fluctuations.

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The flexible door is generally used for the construction of slats assembled are prepared by simply gluing the slats on the other side a flexible diaphragm. In this case, however, the other side of the slats receives a different coating against, for example, moisture, which may cause cross-section in the transverse direction of the plate.

It is an object of the present invention to obviate this drawback, in addition to which the invention provides a simple solution for constructing such a flexible sheet from an initially rigid sheet, e.g. a coated chipboard.

It is an object of the present invention to provide an improvement in a method of making a flexible laminate consisting of ribs of rigid material and a flexible film laminated thereto.

25 Such a product is flexible in one direction and is suitable for use, for example, in the furniture industry and the construction industry as a sheet material for sliding doors.

A solution close to the invention for the production of such a flexible sheet is disclosed in German patent publication 931,726. In this method, a grooved sheet is coated on one side with a flexible film on the side of these grooves, after which the sheet is planed from the uncoated side to the bottom of the grooves, whereby the sheet blank 2 64538 forms slats which the flexible film connects to each other. However, there are some drawbacks to this known method. First, planing is not well suited for lime materials and involves unnecessary consumption of plate-raw material. Secondly, it is thus not possible to simultaneously coat the sheet on both sides, which coating may not only be aesthetically desirable, but also necessary to balance the life of the finished product due to humidity or temperature fluctuations.

The present invention overcomes said drawbacks and provides a method in which both sides of the sheet can be coated simultaneously and in which the consumption of sheet material is low and which method is otherwise technically advantageous.

15 The method according to the invention is characterized mainly in that the formed sälemäl-slstä parts levyaihlo or the other side of the grooved plate is coated with a solid film on both sides, followed by opened-layer sheet structure on the other side so as to form a flexible, separate the louvred parts and consists of connecting them on the other side 20 film, coated plywood structure on both sides.

In the following, the invention will be described in detail with reference to the two 'different embodiments of the invention shown in the figures of the accompanying drawing.

Figure 1 shows a first embodiment of the invention in which the body plate is grooved before coating.

Fig. 2 shows the same as Fig. 1 at the stage when the plywood produced by the method according to the invention has been pre-coated and machined.

Figure 3 shows another embodiment of the invention, in which the plate run-35 is assembled into a plate blank from separate slats.

Figure 4 shows the preform prepared according to Figure 3 pre-coated and unfolded.

64538 3

In the application example according to Figures 1 and 2, a uniform plate, initially grooved on one side, is used as a blank for the ribs.

The body part 1 of the plywood structure can be made of a variety of elements, either pre-grooved or by sawing the grooves into a common plate. The raw material for flexible and roller doors or the like is mainly chipboard, into which grooves 2 are sawn with a circular saw, or a board assembled from wooden slats. In this case, strip blanks 3 are formed between the sawn grooves 2. The plate is coated on both sides with a roll 4, which may be a plastic, rubber, fabric or similar flexible material. The films 4 are fixed with adhesive layers 5 unless they adhere to the plate without it, for example by heating. The pressing of the films 4 against the plate can, of course, be carried out either by means of rollers by rolling or by flat pressing.

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When each side is equipped with a film sheet 4, it is sawn with a circular saw intact open grooved plate side of the grooves 2, respectively, wherein the plate is halls 6 (Figure 2), which are connected to each other on one side of the intact membrane 4, and whose other half is covered with la kalvo1-20 4 '. In this way, a balanced structure is obtained against, for example, changes in humidity, etc. The intact film 4 forms flexible "hinges" between the slats 6 and thus the layer structure is flexible.

When the saw grooves have a certain width, no grooves. 2 against the sawing need to be very precise, but the work can be easily done on the machine line. The method is particularly well suited for purposes where only part of the plate is flexible while the rest is rigid. In this case, even the rigid parts are coated on both sides at the same time.

30 in the structure of Figures 3 and 4 layer sheet is formed of loose trapezoidal sopivimmln cross-section of slats 7 having formed levyaihlon both sides coated with a flexible membrane 4. In the second half releasing may take place revolving saw means as in the previous example, but it may be carried-35 cutting of the rotating blades through. In this way, a balanced and double-sided flexible plywood for doors or the like is obtained from this structure by advantageous methods.

4,64538

What is still to be shown in Figures 1 and 2, the embodiment of the invention, as in the first two grooves cut to the base plate 1 relatively deep, preferably more than half-way to the base plate 1, e.g. particle board thickness. After the step of fixing the foils 4, the grooves 2 mentioned above can be sawn open with the same setting of the blades of the circular saw as with which the grooves 2 were sawn.

In the embodiment according to Figures 3 and 4, at the same time the other side of the slats 7 is provided with a coating 4 *. This is advantageous compared to the fact that each slat 7 would have to be coated separately before the flexible plywood structure is manufactured. In addition, the production of a layer-sheet structure according to Figures 3 and 4 is advantageous in that the slats 7 can be stacked tightly opposite each other and such a sheet blank is coated on both sides with a film 4 so as to provide a well-assembled and easy-to-handle sheet blank. even so that at the same time the other sides of the slats 7 become coated as described above.

The following claims set out within the scope of the inventive concept defined by the various details of the invention.

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Claims (5)

A method of manufacturing a flexible layered sheet structure, which consists of slat-shaped parts (6,7) of wood material or the like and a flexible film (4) joining them, characterized in that one of slat-shaped parts ( 7) formed sheet material or one side sprouted (2) sheet (1) is coated with a uniform film (4) or the like on both sides, whereupon the structure is opened on one side so as to form a flexible, both sides coated layered sheet structure consisting of various slat-shaped parts (6,7) and a film (4) joining them on one side. 10 2. A method according to claim 1, characterized in that a ratchet (2) plate (1) coated on both sides is used as a base plate in the layered plate structure and that the cutting of one side is carried out with a circular saw or the like, which simultaneously As it cuts the film (4) attached to the entire side of the layered disk, the backing sheet (1) says to slots at the latch (2). 3. A method according to claim 1, characterized in that, as a base plate (1) in the layered disk structure, a clamping plate or the like, which is first provided with a circular saw or the like, is preferably used at regular intervals, with relatively deep grooves (2). the laminated sheet is then coated with a film (4) on both sides and the structure is cut to the side in relation to the latch (2) at said latch so that a flexible layered sheet structure is formed, both sides of which are provided. with a surface coating (4,4 '), the coating on one side acting as a flexible hinge part between the disc slats (6). 4. A method according to claim 3, characterized in that in the base plate (1), for example in a clamping disk, latches (2) on one side are cut to over half its thickness and that the slab is cut on the other side with the same settings. the circular saw machine or the like. 35 5. A method according to claim 1, characterized in that the disc blank is formed by slats (7) which have been found in the cross-section.