DE3214291A1 - Fire-resisting panel and method for its manufacture - Google Patents

Abstract

The invention relates to a fire-resisting panel and the method for its manufacture. The object of the invention is to design a multilayer fire-resisting panel and a method for manufacturing such a fire-resisting panel in such a way that considerably improved fire safety, and at the same time heat insulation associated with this, are provided without the need for additional means (such as for example additional mineral wool mats). The invention is characterised in that a) the insulating layer is introduced into a casting mould closed all the way round at the edges, b) a liquid, curable thermosetting plaster is poured onto the insulating layer, c) and then the cooling fire-resisting panel is allowed to dry over a relatively long period of time until the thermosetting plaster has solidified. The fire-resisting panel is characterised in that the thermosetting plaster consists of a perlite mortar. A further essential feature is that, on the lateral end faces of the fire-resisting panel, a groove running all the way round is cut in, into which a connecting tongue of greater width than the depth of the groove can be correspondingly inserted, which tongue engages into the groove of the adjacent, closely abutting fire-resisting panel.

Description

Fire protection board and process for its manufacture

The invention relates to a method for producing a multilayer Fire protection panel for suspended ceilings, floor coverings and the like at the minimum an insulation layer consists of pressed mineral wool.

The subject matter of the invention is also such according to the method Manufactured multilayer fire protection panel.

In the previously known suspended ceilings in building construction, plasterboard is used used that achieve a fire safety class F 30. In certain construction situations however, a significantly higher level of fire safety is required, e.g. class F 60 and above. Such a case could be given, for example, if in a Restaurant a suspended ceiling is available and above the restaurant in the overlying one A living room is on the 1st floor.

If a fire breaks out in the restaurant, the load-bearing ceiling must not be used deformed or collapsed to protect the residents of the living space.

This problem has not yet been solved with known plasterboard because the gypsum material is deformed at around 800 0 C and the necessary Fire safety is therefore not given. The plates loosen when exposed to fire for a long time from their association so that the fire can reach the raw ceiling unhindered.

Another disadvantage of the known plasterboard or other, relatively good conductive panels for suspended ceilings, that a relative there is little thermal insulation.

So far it was necessary in the cavity between the solid ceiling and to lay out additional mineral wool sheets on the top of the suspended ceiling, which is very complex in terms of assembly and also very expensive. Laying out the mineral wool mats in the cavity between the suspended ceiling and the underside of the solid ceiling also encounters various difficulties because the suspension hooks prevent the mineral wool mats from hitting each other closely. The efficiency of such an insulation is therefore severely impaired.

The present invention has set itself the task of a multi-layer Fire protection panel and a method for producing such a fire protection panel to be trained in such a way that a significantly higher fire safety at the same time connected thermal insulation is available without additional measures (e.g. additional mineral wool mats) can be avoided.

To solve the problem, the invention is characterized in that that a) the insulation layer is placed in a casting mold that is closed around the edge inserts, b) pours a liquid, curable thermal plaster onto the insulation layer c) and then dry the cooling fire protection board over a longer period of time leaves until the thermal plaster has solidified.

First of all, a rock wool panel or a glass wool panel is used or another highly fire-resistant mineral fiber product placed in a mold, where the Cast the inserted plate on all four front sides protrudes laterally. The pouring space, which is accessible from above, now becomes more fluid Insulating mortar (registered trademark: Perlite mortar) poured in, with this Insulating mortar creates a firm bond with the surface of this insulation layer comes in. The side surfaces of the casting mold are then lowered so that the upper edge (the later visible side) of the poured thermal plaster layer become visible. These Crates are then chamfered.

Then the entire mold is pulled downwards to one to avoid impermissible adhesion of the mold turning with the Perlite mortar and tearing off of mortar components when removing the form.

The casting mold is thus removed downwards and the product obtained in this way is now air-dried for about 28 days, so that after this time a highly heat-resistant, excellent insulating and highly fire-resistant multilayer fire protection board is obtained. The insulating mortar can also consist of a mixture of Mortar and expanded clay are made. All other known insulating mortars can also be used or other hardenable stone mortars that insulate accordingly.

In a further development of the present invention, it is preferred if additional reinforcement ribs are introduced into the mortar plate (thermal plaster layer) will.

Such reinforcement ribs improve the adhesive bond with the insulation layer made of pressed mineral wool (e.g.

Rock wool panel) and also the mechanical load-bearing capacity (Flexural rigidity) of the fire protection panel improved.

First of all, a circumferential frontal groove attached to the later Preserved fire protection panel to butt tightly in the composite, with a highly heat-resistant connection means and a highly fire-resistant spring made of pressed mineral wool is used.

After the end-face circumferential groove has been produced, the insulation plate Provide thermal plaster with longitudinal grooves on the composite side. These grooves are achieved by milling and are about 15 mm wide and 15 mm deep. After this this insulation plate produced in this way was introduced into the casting mold potting in the manner previously described. The casting material then penetrates into the Grooves in the composite panel so that the mortar panel has additional webs in the longitudinal direction receives.

The main advantage of the entire arrangement is that an extraordinary high fire safety is achieved by the fact that once a highly fire-resistant Insulating mortar plate is created behind which an insulating layer of pressed Glass wool is arranged. The fire safety is further improved in that a spring made of pressed mineral wool is used as a connecting spring, which the grooves of abutting plates completely sealed, so that by this No combustion gases can penetrate between the space.

An additional advantage of the fire protection board obtained in this way is its high level Thermal insulation capacity, so that the laying out of further insulation strips in the space between a solid ceiling and a suspended ceiling made of such fire protection panels can be omitted.

The use of such fire protection panels according to the invention is Not only suitable for suspended ceilings, but such fire protection panels can can also be used as cladding for walls. The dimensions and proportions the fire protection panel are chosen so that the panels are stacked overhand can and the tongue and groove connection to improve the mechanical rigidity contributes to the entire suspended ceiling. In addition, the fire protection panels be connected to the wall with conventionally known wall anchors.

A dry screed is also possible with the fire protection board produce, so that such fire protection panels directly on the bare floor of a New building or an old building can be designed and using the tongue and groove connections are connected to each other. As a result, it can then be provided that to increase the surefootedness (breaking strength) of the edges of the mortar slab additional angled Profiles are inserted into the mold so that the profiles protect these edges.

Due to the improved mechanical stability of such fire protection panels it is possible to use a format of 125 x62.5cm instead of the known format of 62.5x62.5cm to choose.

To increase the flexural rigidity, it can be provided that before the pouring of the mold into this first on the insulation layer a reinforcement made of expanded metal is placed and that additional retaining plates are attached, those with appropriate brackets and wires through the back of the isolation plate push through so that the plate at the free end of this bracket and wires Additionally can be suspended from the solid ceiling.

With a multi-layer fire protection panel according to the invention can a fire safety class F 90 and more can be achieved, what with the previously known fire protection panels was not possible.

The subject matter of the present invention does not result only from the subject matter of the individual claims, but also from the combination of the individual claims with one another.

In the following, the invention will be described in terms of several ways in which it can be carried out Illustrative drawings explained in more detail.

In this connection, further elements that are essential to the invention can be found in the drawings and their description Features and advantages of the invention.

They show: FIG. 1: Section through a suspended ceiling construction with fire protection panels according to the invention and a novel suspension system in a first embodiment; Fig. 2: Top view of the fire protection panels laid in the composite a suspended ceiling according to Figure 1; Fig. 3: Detail section through two abutting Fire protection panels of a suspended ceiling according to FIGS. 1 and 2; Fig. 4: Section and plan view of a fire protection panel in another embodiment; Fig. 5: Section through the fire protection plate according to Fig. 4 showing a ceiling suspension system in a second embodiment; 6: View of a wall bracket; Fig. 7: View a retaining bracket; FIG. 8: a plan view of the retaining bracket according to FIG. 7; Fig. 9: View of a spacer; 10: View of a ceiling profile; Fig. 11: View a tension spring slide piece; Fig. 12: View of the ceiling suspension on the solid ceiling; Fig. 13: View of a holding plate with carrying attachment for additional support a fire protection plate according to Fig. 3 or Fig. 4.

Figure 1 shows the construction of a suspended ceiling with fire protection panels loo according to the invention, which in the association (Fig. 2) butted tightly and by tongue and groove connections connected are suspended from a solid ceiling 1o6. The solid ceiling is here supported by ceiling beams 107. The suspended ceiling 105 shown in FIG. 1 made of fire protection panels 100 according to the invention so a fire safety of class F 90 and more, so that when the test temperature is used as intended from below onto the suspended ceiling 105, the ceiling beams 107 and the solid ceiling 106 are not affected.

The fire protection panels 100 have a two-layer structure, namely a view made of thermal plaster 1o1 on the visible side and one behind it arranged in the adhesive bond with the thermal plaster layer lol arranged insulation layer 110, which consists of pressed mineral wool panels. -The suspension from the ceiling is explained in more detail in connection with FIGS. 3 and 6 to 13. FIG.

For the time being it is already pointed out that the suspension of the fire protection panels 100 is done in two ways.

First is in the interface between the layer of thermal plaster 1o1 and the insulation layer 11o each have a holding plate @@@ a @@@@@@, which is from a wire 230 is sheathed, the free end of this wire 230 through the back of the insulation layer 110 is pushed through and with an eyebolt 250 and an assigned brass dowel 251 (see Fig. 12) on the solid ceiling 1o6 is attached.

This suspension system is used to prevent impermissible sagging of the Avoid fire protection boards 100.

The other suspension system is that with a special bracket 240 (Fig. 7, Fig. 8) the edges of the fire protection panels are set loo and the Retaining bracket connected to the solid ceiling 1o6 via additional suspension profiles 210,220,250 is.

FIG. 3 shows a fire protection plate 100 in section with an illustration of the connection via a tongue and groove connection with another fire protection plate loo.

First it can be seen that the thermal plaster layer 1o1 with corresponding Reinforcing ribs 102 engage in the region of the insulation layer 11o. The insulation layer has a circumferential groove 103 into which the connecting spring 200 is fitted. Such a fire protection panel 100 is connected to the wall by placing it on top a wall bracket 260 (see FIG. 6) and an additional seal by abutment the connecting spring 200 on the wall.

The connection of a fire protection plate loo with an adjacent one takes place according to Fig. 7 and 8 with the bracket 240 shown there with his horizontally protruding leg 241 into the interface between the thermal plaster 1o1 and the associated insulation layer 11o is driven in. The bend 255 then fits into the groove 103, with the bend 255 being inserted vertical leg adjoins that on the face of the fire protection panel 100 rests and a further angled portion 256 is formed on this vertical leg that connects (push in) the ceiling profile shown in Fig. 10 202 serves. The retaining brackets 240 of adjacent fire protection panels loo complement each other exactly symmetrical, so that the spring is defined by the bends 255 Space can still fit, with 256 in the upper bends Adjacent retaining bracket 240 pushed in the horizontal legs of the ceiling profile 202 will.

The ceiling profile 202 has an upper rolled insertion profile 114 on, which is in the profile recess 115 of a Tension spring sliding piece 210 (see FIG. 11) is latched or pushed in. The tension spring sliding piece 210 according to FIG. 11 has two protruding lobes, each of which lobes with one below the other aligned bores are provided which grip around a suspension hook 220 in a clamping manner, which in turn engages with its hook end in an eyebolt 250, which in turn is screwed into a brass dowel 251 that sits in the solid ceiling 1o6 (cf. Fig. 12).

According to Fig. 3, additional spacers 270 (see Fig. 9) on the one hand with support on the wall and on the other hand with support on the ceiling suspension be attached to give additional stability.

The fire protection plate 100 according to FIG. 3 has with regard to the thermal plaster lol a thickness of 16 mm and with regard to the insulation layer a thickness of 50 mm. The fire protection board obtained in this way gives the required high level of fire safety. It is of course possible that even higher insulation values are required are, a corresponding greater thickness of the insulation layer 11o can be selected.

The fire protection plate 1oo shown in FIG. 4 essentially has the same two-layer structure as the fire protection panel shown in FIG. 3. In contrast to this, there is a reinforcement in the thermal plaster layer lol before it is poured 301 made of expanded metal, which is shown even more clearly in FIG. 5. To the Such a fire protection plate is suspended from the reinforcement bars from a retaining bracket 302 comprising the insulating layer 11o pierces and on the The back peeps out with a bend. On this bend, what is shown in Fig. 5 shown clamping profile 305 pushed on, which in turn has a horizontal support arm a suspension profile 310 receives, which essentially corresponds to the ceiling profile according to Fig. 1o corresponds to. The slide-in profile of this suspension profile 310 is in turn from corresponding associated profile recesses received in a sliding piece 311, the sliding piece 210 according to FIG. 11, the suspension from the solid ceiling again being above a suspension wire 312 and the ceiling mount 313 takes place.

Such a fire protection plate according to FIG. 4 with inserted reinforcement 301 is used in dimensions of 62 cm x 125 cm, making it a special favorable storage and easy assembly results.

The connecting spring to be pushed into the circumferential groove on the side 200 is according to FIG. 5 on the broad sides above and below with an aluminum foil 201 covered to give this connecting spring 200 an even better fire safety admit. According to FIG. 4, the connecting spring can be clamped with a clamping profile 305 to then be suspended from the ceiling with a suspension profile 310, in of the type as explained in connection with FIGS. 10, 11 and 12.

Claims (8)

Claims 1. A method for producing a multilayer Fire protection panel for suspended ceilings, floor coverings and the like. with at least one insulation layer made of pressed mineral wool consists, that a) in a marginal side encircling, closed casting mold inserts the insulation layer (110), b) on the Insulation layer a liquid, curable thermal plaster (1o1) pours on c) and then dry the cooling fire protection panel (100) over a longer period of time leaves until the thermal plaster (101) has solidified. 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 before the execution of process step b on the insulating layer (110) a reinforcement (301) made of expanded metal is placed, the retaining bracket (302) through the insulation layer (11o) are pierced until they are on the back of the Insulation layer (110) protrude. 3. The method according to claim 1 or 2, d a d u.r c h g e k e n n z e i c h n e t that before execution of process step b on the insulation layer (11o) with a wire (230) looped holding plates (231) at a mutual distance are placed, the free wire ends through the insulation layer (11o) be pushed through and protrude on the back. 4. Fire protection panel 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 thermal plaster (101) consists of a perlite mortar. 5. Fire protection panel according to claim 4, d a d u r c h g e k e n n z e i c h n e t that on the side faces of the fire protection plate (loo) a All around groove (103) is milled into which a connecting spring (200) is larger Width than the depth of the groove (103) can be pushed into the corresponding Groove (103) engages the adjacent, tightly butted fire protection plate (lot). 6. Fire protection panel according to one of claims 4 or 5, d a d u r c h g e k e n n n e i c h n e t that the insulation layer (11o) at its interface to the layer with thermal plaster (1o1) with parallel and spaced apart Reinforcing ribs 1o2 (grooves) is provided. 7. Fire protection panel according to one of claims 4 to 6, d a d u r c h g e k e n n n n e i c h n e t that in the circumferential groove (103) a retaining bracket (240) engages with a bend (255) to which a horizontal, free Leg (241) adjoins, which is in the insulation layer (110) in the area of the interface is driven to the thermal plaster (101). 8. Fire protection panel according to one of claims 1-7, d a d u r c h g It is not possible to indicate that the profile connected to the fire protection panel (loo) (240,302) via intermediate profiles (202,210,305,310,311,312) with the solid ceiling (106) connected is.