DE2652952C3 - Process for the production of lightweight panels or bodies with flat areas and use of the process for the production of a roller shutter box - Google Patents

Description

The invention relates to a method as described in the preamble of claim I. For the production of lightweight panels or bodies with flat areas with a core layer Wood wool cement.

Wood wool cement is a material made from thin-walled, long wood shavings by adding the Shavings with a thin liquid cement paste and then pressed together until the cement is cured.

A method of the type mentioned is known. With him, after pressing the core layer, a Foamed polystyrene coating as an insulating layer. On this insulating layer, more than Covering or decorative layers are applied. It has been shown that between There is insufficient adhesion to the polystyrene and the wood wool cement layer and that the insulating effect The lightweight panel does not meet the general requirements In addition, the weight these lightweight panels are too large in relation to their insulating or insulating effect.

The known method for the manufacturer of such components is complex and expensive overall because it is used for this special devices with large presses and multi-shell molds are necessary and the individual Starting materials of a complex pretreatment with, for example, strong heating and must be subjected to bringing together several plastic components. The polystyrene coating requires special pretreatment because the adhesive to be applied is repellent and have a dissolving effect.

The invention is based on the object of designing a method of the type mentioned at the outset in such a way that that the lightweight panels or body can be produced more easily with it than with the known method and that there is a more permanent and more solid cohesion of the individual layers. Further the insulating effect of the layered bodies against temperature and noise should be better than with the products manufactured by the known process.

To solve this problem, the above-mentioned method according to the invention is in the im characterizing part of claim 1 specified manner designed.

A product made according to this has an essential better insulating effect than the known objects because of the embedded, thin metal layer with the adhesive means an insulating barrier and this special adhesive on the metal layer when heated penetrates into the surface of the core layer, hardens and thus a solid, but light and stable unit forms. The new lightweight board also has a significantly lower weight because of the layer thickness each thinner can be chosen with at least the same strength. With this new process cheap and nevertheless high quality products can be produced, since the individual parts are as ready-made products can be processed quickly and easily. The trick, a layer of metal to be used with adhesive and protective application on both sides, for a short time and with a simple Heating device can be activated, simplifies the production of the lightweight panels fundamentally. Nevertheless the metal layer does not form a cold bridge to the top of the lightweight panel, as it is through the Isolation layer is shielded.

In the manufacturing process, it has been found to be quite expedient if the features of claim 2 are applied. As a result, the product can be manufactured to very long lengths and the stock material does not require a large amount of space. Both the insulating layer as the metal layer can be acquired in all popular formats and are stacked on rollers so that costly and time-consuming Zuschneidearbeiten or Trimming g _u nz come in elimination. Rather, a continuous manufacturing process with rolling up, heating and pressing is achieved, which is efficient and cost-saving, because the device required here only needs

to consist of a narrowing gap, the initial part of which can be heated and through which the layered one Plate is pulled through. The insulating hard foam layer is preferably one layer thick 1 cm unwound from a roll

In practice, the best insulating effects and the lowest weight for the created products have been found when light metal, preferably aluminum in foil, is used for the metal layer. This thin metal layer provides a total partition wall and increases the insulating effect. In addition, it is a good carrier for glue application. In this case, has proved expedient to use bitumen or tar for the adhesive which is applied to the metal layer, which is preferably at approximately 100 to 120 ⁰ C is soft and sticky. In this temperature range there is excellent adhesion of both the metal layer to the wood wool cement layer and the insulating layer to the metal layer. At this temperature, there is no risk of the wood wool cement layer being damaged is expelled. Bitumen and tar are known to be waste products in petroleum refining and as a result a very inexpensive substance whose adhesive properties last for a very long time. This selection of substances also contributes to the fact that the end product is cheap. The adhesive effect is also given with every plastic, so that the insulating layer, which is a polystyrene or polyurethane foam according to claim 4, adheres well to the metal layer without the surface dissolves, the heated bitumen rather penetrates into the foam and matted with it to form a hard layer.

The invention has proven to be particularly suitable for the production of roller shutter boxes with a U-shape Cross-section and laterally isolating cheeks.

A roller shutter box produced in this way is very dimensionally stable and guarantees a much better one Insulating effect against heat and sound than conventional roller shutter boxes. In particular the pickled Foil contributes to the insulation and, despite the narrow overall wall thickness, provides a much larger one Soundproofing than the previous, larger wall thicknesses made of rigid foam and wood wool cement. the The wall thickness of a roller shutter box cheek constructed in this way can therefore be less than a conventional one Cheek can be chosen, which is especially desirable for modern buildings

Another layer of wood wool cement can be applied to the insulating layer. This additional Wood wool cement layer increases the strength again, at the same time becomes the sensitive insulating layer Covered from synthetic foam and created a wear layer, which can also be used as a carrier rail for a plaster coating or a paint application can serve.

There follows a description of an exemplary embodiment of the method according to the invention and then ω manufactured products based on the drawing. It show the

Fig. I, 2, 3 the process sequence in the production of a lightweight panel,

F i g. 4 shows a partial section through such a lightweight construction panel and

F i g. 5 is a perspective view of a section of a roller shutter box according to the invention Process is established

At the beginning of the process for the production of a lightweight board, loosely layered wood wool is used 1 soaked with a suitable binder, preferably a liquid cement 4 and between Press members 2 and 3 compressed to such an extent that a known core layer 10 (FIG. 2) is produced F i g. 1 is indicated, can already when pressing the wood wool 1 with the cement 4 in the pressing device a metal layer 5 can be inserted with double-sided coating 6, which is then on the underside and / or adheres to the top of the core layer 10 when the intermediate product is removed from the die.

The adhesive here is a heat-activated adhesive, for example bitumen or tar, which is not yet activated during the pressing process itself. In which intermediate product produced in this way, the metal layers 5 adhere temporarily only through the solidified Cement on the core layer 10.

Like F i g. 2 indicates, the core layer 10 with the two-sided metal layers 5 ur / '. the adhesive layers 6 removed from the pressing device and held in place with suitable holding devices 7. On the Both upper sides, the heater 8 to act with a temperature of 100 to 120 ° C brought, which activate the adhesive layers 6 as indicated at 9.

The adhesive layers 6 facing the core layer then bond with the wood wool cement material, in connection with this, as indicated in Fig. 3, on the still heated outer adhesive layer 6 composite panels 11, 12 consisting of a layer 11 a rigid plastic foam and a cover layer 12 applied to it, placed on top and with the help be rolled up by rollers or rollers 13 in the direction of arrows 14. When the In a composite, the adhesive layers connect with their surroundings and thus create a firmly bonded one lightweight tarpaulin consisting of several layers. The finished product is shown in FIG. 4 shown and consists of a core layer 10, the metal layers 5 bonded to it on both sides, and the outer insulating layers 11 with the cover layers 12. A further decorative layer or a fine or rough plaster layer can be applied so that the finished Lightweight panels without further treatment, e.g. B. for hanging from false ceilings or as Exterior facade panels can be used.

In Figure 5 it is indicated how the above Method for producing the insulated panels when they are introduced into the roller shutter boxes 20 are used can be. The left half 20a of the Rciliidenkastons represents an intermediate stage in the manufacture while the right half 206 illustrates the finished, laterally stripped roll bar box As a rule, however, the roller shutter box is only coated with an insulating coating on one inner side, as follows is described.

The Roliadenkästen has a U-shaped cross section with a flat transverse part 21, of which two approximately vertical cheeks 22 extend downwards extend. It consists of pressed wood wool cement and can be designed as a prefabricated component be. A metal layer 23 is preferably applied to the inside of its cheeks 22 without any further preliminary treatment inserted in the form of an aluminum foil with a bitumen or tar application 24 on both sides.

inner side of the insulating layer 26, a further cover layer can be applied, so that the sensitive and unsightly top of the plastic foam board is covered. This coating 27 can either be provided from the outset on the insulating layer 26, for example by having a Prefabricated composite panel is used, but this layer 27 can also be painted on later or sprayed on. In the drawings, the thicknesses of the individual layers are for the sake of one Exaggerated for clarity.

Then, in the interior of the roller blind box eil heating element 25 is introduced which heats the bitumen layers 2 · to a temperature range between 100 and 120 ⁰ C, so that they are liquid. After that there will be

■> Heating element 25 removed and an insulating layer 26 au a rigid plastic foam, preferably au Polystyrene or polyurethane placed on the still liquid) sticky bitumen layer and with the help of a no longer shown role of a press member

ίο pressed on. When the bitumen layer hardens an intimate connection between the cheek 22, the aluminum foil 23 and the insulating layer 26. Auf di <

For this 1 sheet: Drawings

Claims (5)

Patent claims: 1. Process for the production of lightweight panels or bodies with flat areas, such as Roller shutter boxes with U-shaped cross-sections, consisting of a core layer of wood wool cement, with an insulating layer made of a foam plastic mostly in areas on at least one side is connected, the insulating layer on its outside at least one further layer may have, in which the core layer is formed by pressing (press molding) and the insulating layer and any additional layers that may be present are applied and the layers with one another are connected, characterized that on the side of the core layer (10) to be coated with the insulating layer at or after the compression molding and before the application of the insulating layer, one on both sides with a heat-activated one Adhesive coated metal layer (5) is applied that the adhesive by heating activated and the metal layer (5) is bonded to the core layer (10) under the action of pressure and that a prefabricated rigid plastic foam layer is used as the insulating layer (11) and that Applying this layer to the still heated free adhesive layer (6) underneath the metal layer (5) Exercise of pressure is carried out, the connection possibly existing further Layers made with the insulating layer (11) prior to their application to the core layer (10) can be. 2. Method according to Anspn. "* H 1, characterized in that that the insulating layer (11) and the metal layer (5) taken from a R ^ Me and rolled onto the core layer (10) and pressed. 3. The method according to any one of claims 1 or 2, characterized in that for the metal layer (5) a light metal, in particular aluminum, and bitumen or tar can be used as an adhesive. 4. The method according to any one of the preceding claims, characterized in that for the Foam of the insulating layer (11) a polystyrene or a polyurethane foam is used. 5. Use of the method according to any one of the preceding claims for the production of a Roller shutter box with a U-shaped cross-section, in which at least one cheek (22) with the metal (5, 23) and insulating layer (11,26) is covered.