NO801262L - PROCEDURE FOR PREPARING A ILLUSTRATED DOOR SHEET - Google Patents

Description

Fire-retardant, respectively fire-resistant doors with a wide variety of inserts such as e.g. mineral wool, plasterboard boards or asbestos-containing boards are known, e.g. from Zulass-^ung vom IfBT, Z 6.13 - 117. These door inlays are produced in a separate work process in partly cumbersome methods, then cut to size in further work steps and inserted into the frame construction of the door leaf.

However, these door inlays have no load-bearing function in the door structure, the door frame or door leaf construction must therefore be very stable. The tin thickness of the frames or door leaves is therefore considerable in cases of fire, therefore very strong deformation phenomena occur. These malformations are so great that in the event of a fire, the door can partially collapse so that the fire breaks through. Furthermore, with some of these door constructions, the posts must also be supported and fixed.

The task of the present invention was therefore to provide a method for the production of a fire-resistant door construction element with which the door leaf can be produced serially with little material means in the desired shape and design and fulfills the requirements with regard to the required fire resistance service times.

This task is solved by a method for the production of a fire-resistant door leaf, where the method is characterized by sticking a mineral fiber layer on a thin tin skin and then applying a magnesium oxychloride foam layer. The mineral fiber layer can be a net, weave, work or as a mat made of a wide variety of inorganic components, e.g. glass wool, stone wool and/or asbestos fibres. Preferably, a glass fiber mat with a surface weight is used

2

about. 25 0 gr/m .

It is preferably used as a refractory adhesive

a water glass layer in which the fiberglass mat is embedded. The quantity of Klebé must be applied in such a way that the fiberglass mat is not overcrowded, but mat parts still remain dry. In these still dry fiber parts, the applied magnesium oxychloride foam anchors itself....

The magnesium oxychloride foam is produced in a known manner by mixing together magnesium chloride, magnesium oxide or burnt magnesite, water, wetting agent and additives and this mixture is foamed by foam generators, e.g. hydrogen peroxide and possibly catalysts.

With the help of the intermediate layer, the tin lining is so well connected to the magnesium oxychloride foam layer that it is possible to considerably reduce the thickness of the tin, e.g. for thin foil thicknesses and extra bracing angles and bends, as well as special profiling, can be disregarded.

Reducing the thickness of the sheet metal and simplifying the bracing causes, in case of one-sided thermal stress in the event of a fire, small deformations of the overall door structure, which in turn enables easier assembly and fitting. If the sheet metal cladding is only foil-thick, this melts away in cases of fire and there are no deformation phenomena overhead. • This can e.g. also produced, consciously, as e.g. tin skin consists of aluminum or other light metals which are flammable or easily fusible.

In a variant of the method, two door-cover layers with the above-mentioned structure are combined and connected to each other in such a way that it is possible to have fire protection on both sides. In this case, however, only a door cover layer can be applied either with or without a water glass layer on an above-mentioned door cover layer.

Preferably bring in finely divided glass fibres

in the magnesium oxychloride foam, which even has a fixing effect on the foam and prevents cracking in the event of a fire.

For fire protection, the shape of the door is irrelevant. However, the magnesium oxychloride foam layer must have a sufficient thickness to have the required fire resistance period in the event of a fire. The invention shall be explained in more detail by means of some examples with reference to the drawing.

in

Example 1

A door panel (2) is already attached to the door frame construction (1). Likewise, all fittings and locks (3) have been fitted. The inside of the ■door design (i;2,3) and the cover plate (4) are coated with adhesive (5). The glass mat (6) is inserted into this adhesive layer. The edge (7) remains free of adhesive and glass mat. The frame structure (1) is filled with liquid magnesium oxychloride foam (8). It is also worthwhile to impregnate the glass mat (6) and the cover sheet (4) with magnesium oxychloride foam. Now the sheet metal (4) is placed on the frame structure (1) and the edge area (7) is connected by screwing, riveting or welding (9). The liquid magnesium oxychloride foam in the frame structure (1) and that on the cover plate (4) connect to each other and form a unit after curing.-

Example 2

As in example 1, the frame structure (1) and cover plate (4) are equipped with adhesive (5) on a glass mat

(6). Complete assembly without magnesium oxychloride foaming

now the building part (screwed together, riveted, welded) (9). Through a casting (12), the liquid magnesium foam (8) is conveyed through a pump or through a mixing and dosing unit into the door cavity (10).

Example 3

Like examples 1 and 2, the frame structure (1/2) and the cover plate (4) are coated with adhesive (5) and glass mat. In the door cavity, a ready-to-size magnesium oxychloride-foam board or a magnesium oxychloride-foam composite board that is coated with water glass or magnesium oxychloride (13) is now placed. This construction is closed as an example. 1 when applying the cover plate (4) and screwing, riveting or welding with the frame profile (1).

Claims (4)

1. Method for producing a fire-resistant door leaf, characterized by sticking a mineral fiber layer on a thin tin skin and then applying a magnesium oxychloride foam layer. 2. Method according to claim 1, characterized in that glass fibers are introduced into the magnesium oxychloride foam layer. 3. Method according to claim 1 or 2, characterized in that glass fiber is glued on as a mineral fiber layer. 4. Method according to one or more of claims 1-3, characterized in that water glass is used as adhesive.