DE8708994U1 - Pressing device - Google Patents

Description

BILFINGER + BERGER " " " ' 6800 Mannheim, 23.06.1987

Construction Company Carl-Reiß-Platz 1-5

ZT-Per/sü

Description

The invention relates to a pressing device for generating a flat contact pressure when bonding plate-shaped material parts, for example plastic sheets, thin metal sheets or metal foils, to a solid, γ substrate.

Bonding plate-shaped material parts, such as plastic sheets, thin metal sheets or metal foils to solid surfaces, such as walls, ceilings or floors of containers, requires adhesives with processing times of generally 1 to 2 hours to enable the large-scale application of adhesive and the attachment of the plate-shaped material parts. In particular, when bonding the plate-shaped material parts to vertical surfaces and when bonding them overhead to ceiling soffits, they must be fixed until the adhesive has developed an initial adhesive strength that prevents the plate-shaped material parts from moving or falling down. Furthermore, the contact pressure must be as even as possible across the surface in order to prevent partial detachment, the formation of air bubbles and different adhesive strengths.

The invention is based on the object of specifying a pressing device that is easy to handle, that generates as uniform a surface contact pressure as possible, that can also be used for curved adhesive surfaces, and that does not require any complex scaffolding and support devices.

This object is solved by the characterizing part of claim 1. Further advantageous embodiments of the invention are specified in the subclaims.

4· mm i * i · ii Ii i * 4 t * ♦ * C · ti I*

A significant advantage of the pressing device according to the invention is its ease of use. The pressing device is usually used in a size (for example 1 x 2 m) that allows it to be easily transported by a specialist and installed at any point on a building project, even via ladders. After switching on the vacuum generator, for example a vacuum pump, the pressing device attaches itself to the substrate and presses the plate-shaped material part I to be bonded evenly. To achieve this effect, the pressing device must rest directly on the solid substrate with some of the recesses (5) on at least one side. When bonding long material strips, several pressing devices can be used one after the other, so that a very high working speed can be achieved .

A further increase in working speed can be achieved if the adhesive surface is heated during pressing, as most of the adhesives used today set faster when the temperature is increased. The adhesive surface can be heated using electrically heated heating coils (7) arranged in the plate-shaped element (1). jj

A further advantage of the pressing device according to the invention is that it can be used on almost any curved surface, provided there are no sharp edges, since the plate-shaped element (1) is made of an elastic material. The contact pressure can also be controlled by the size of the negative pressure generated. For the main areas of application, negative pressures between 0.1 and 0.5 bar are sufficient.

Further advantages, features and details of the invention emerge from the following description of preferred embodiments, which are explained in more detail with reference to the drawings.

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Show it:

Fig j I a plan view of a pressing device

Fig« II a longitudinal section through a pressing device

Fig« III a section of page (3)

Fig. IV an enlarged detail section

The pressing device shown in Fig. I has a rectangular shape in plan. The plan shape can, however, be chosen as desired depending on the intended use. The edge area (4) is designed to be much thinner than the middle area in order to achieve good conformability for sealing against the substrate. Two connection pieces are marked with (6) to which the vacuum generators can be connected via hoses. The pressing device can be heated via the electrically heatable coils (7). Fig. II shows a longitudinal section corresponding to Fig. t.

Fig. III shows an example of the suction side (3)* which is designed like a knob, with the recess marked with (5) and the round knobs with (8). Fig. IV shows the corresponding longitudinal section.

Claims (5)

■••J-UO-Oi BILFINGER + BERGER ' 6800 Mannheim, 23.06.1987 Bauaktiengesellschaft Carl-Reiß-Platz 1-5 ZT-Per/sü Pressing device Claims 1. Pressing device for generating a flat contact pressure when gluing plate-shaped material parts, for example plastic sheets, thin metal sheets or metal foils, to a solid substrate, characterized in that it consists of a plate-shaped element (1) made of an elastic material, the side (2) of which is completely closed and the opposite side (3), with the exception of the edge areas (4), is provided with depressions (5) which are connected to all adjacent depressions (5) and that the cavities formed by the depressions (5) can be connected to an air vacuum generator by at least one tubular connecting piece (6). 2. Pressing device according to claim 1, characterized in that the edge region (4) is formed with a material thickness d _R which is at most half the material thickness of the plate-shaped element (1) in the central region. 3. Pressure device according to claim 1, characterized in that the edge region (4) consists of a plastic material. A ₄ Aerating device according to claim 1, characterized in that the plate-shaped element (1) is heatable. 5. Pressing device according to claim 1, characterized in that electrically heatable heating coils (7) are incorporated into the plate-shaped element (1)* • · ti • 1 · * &igr;