DE2261891A1 - FORMWORK ELEMENT FOR CONCRETE FORMWORK AND METHOD FOR MANUFACTURING IT - Google Patents

Description

PATENT ADVOCATE DIPL-PHYS. HEINRICH SEIDS

62 Wiesbaden-Bierstadt · Bierstadter Höhe 15 ■ Postf ad » 12068 'Telephone (06121) 56 53 82. Postsdied "Frankfurt / Main 181008 · Bank Deutsche Bank 3956372 · Nass. Sparkasse 108003065

Wiesbaden, December 15, 1972 L 212 S / rd,

Societe: LES GOPFRAGES MODERHES 75019-Paris, France

Formwork element for concrete formwork and process for its manufacture

The invention "relates to a formwork element for Concrete studs and a process for their manufacture.

Formwork elements are formwork parts, their bottom surface is generally flat. Such formwork elements are used for casting bodies with, for example, vertical or horizontal or vertical and horizontal surfaces at the same time.

In the art, a formwork element is known that a Contains sheet metal as a Schalfläohe, this sheet metal must withstand the hydrostatic pressure of the poured concrete and therefore on its back by numerous, to that

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Dipl.-Phys. Heinrich Silk ■ Patent Attorney ■ 62 Wiesbaden-Bierstadt · Bierst. Height 15 · Poetf. 12068 flp (06121) 565382

Sheet metal clamped tensioner is held, which itself again are held in a resistant! support structure. the the many so-called white spots on the shuttering sheet that are necessary which require a considerable amount of time for their execution, cause deformation of the element, which must therefore be aligned, which in turn requires considerable time. In addition, this makeup structure is also difficult and expensive.

In contrast, the invention is intended to create a formwork element in which these deficiencies and disadvantages are prevented * The formwork element should be stable in itself, namely against bending forces and shear forces. Sa should can be used without additional stiffening elements and exclude the occurrence of irregularities (bulges or tension) on the formwork surface when pouring the concrete. In addition, the formwork element should be easy, quick and cheap to produce *

This object is achieved according to the invention in that an actual half-sheet and one through a layer of plastic, for example a layer of highly compressed Polvureinn foam, separated from it, arranged in parallel Rüokenbleoh are provided, the plastic layer in

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Dipl.-Phys. Heinrich Seids - Patent Attorney · 62 Wiesbaden-Bierstadt · Bierst. Höhe 15 Postf. 12068 ® (06121) 56 S3

Type of molding process with polymerization or foaming is formed between the surfaces, in which after the introduction of the plastic between the surfaces of the during the polymerization or the foaming occurring high internal pressure over the Sheet metal from the inner surfaces of one of the final surface conditions of the formwork sheet and the back sheet-defining shape was added and the cohesion between the Formwork sheet and the Rücketolech essentially on the plastic itself or its adhesive properties according to the Polymerization or foaming is based.

Attempts to complete the task with formwork elements in a "sandwich" structure, namely with the actual formwork surface forming wall and a second wall and one in between, with one for receiving the tensile and resp. or filling absorbing pressure forces, for example made of expanded plastic, were unsuccessful. The sheer use a filler material is not sufficient to compensate for bending forces and / or shear forces like them result from one wall to the other and which are generated by the bending moment of the two walls. Around To avoid deflections and shear effects, it would be necessary to stiffen the two walls, be it that at it connects on its circumference by means of rigid edge profiles

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Dipl.-Phys. Heinrich Seids · Patent Attorney · 62 Wiesbaden-Bierstadt · Bierst. Height 15 · Postf. 120 68 · 5? (06121) 565382

or non-peeling walls used, the appropriate shape have to suppress the bending moment. This would, however, reduce the production of such formwork elements very difficult. Incidentally, such an execution would also be do not make it possible to avoid irregularities (bulges or tensions) that are found on the sohale surface during the introduction of the filler material between the walls result. A real solution to the task at hand has emerged therefore can only be created by the invention characterized above.

In order to increase the adhesion of the plastic, one can advantageously, but not necessarily, before molding of the formwork element, the inner surfaces of the KLeche with a Coat the primary layer. Within the scope of the invention, the formwork element can also be attached to one another at the edges (Formwork elements on Sohalungselemente), which are welded to the two sheets.

The shuttering sheet according to the invention offers the rest of the surprising advantage compared to conventional formwork elements, that it has a very low thermal conductivity. This results in considerable thermal insulation of the switched concrete, so that the self-heating of the

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Dipl.-Phys. Heinridi Seids ■ Patent Attorney · 62 Wiesbaden-Bierstadt · Bierst. Height IS Postf. 12068 @ (06121) 56 53

Concrete due to the considerable amount released during setting Can utilize the amount of heat. This considerably accelerates the setting process and the formwork is removed from the concrete a lot faster possible.

The formwork elements according to the invention can be on a conventional! support structure are supported and connected to each other by conventional devices.

In one embodiment of the invention, the back plate is stiffened, for example, before the formwork element is manufactured by parallel ribs. As a result, the required quality of the expanded plastic can be reduced keep. It is then possible to use foamers of the usual quality with a density of about 100 kg / m 2.

For the production of formwork elements according to the invention, a method is particularly suitable in which a formwork sheet and a back plate, which was previously in terms of dimensions and shape have been prepared, are arranged parallel to each other with a gap of the desired width, this space is filled with polymerizable or foamable plastic material and the plastic material

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Diploma Phys. Heinrich Seids ■ Patent attorney · 62 Wiesbaden-Bierstadt ■ Bierst. Height 15 Postf. 12068 & (061 21) 56 5382

in one that also accommodates the metal sheets, the final surface texture of the formwork sheet and the support sheet defining the shape under support of the resulting internal pressure polymerized or foamed through the inner surface of the organs will.

An embodiment of a formwork element of the geraäss The invention is explained in more detail below with reference to the drawing; show it:

Pig. 1 A vertical section perpendicular to the plane of the formwork element and

j? y. Figure 2 is a rear view of the balancing element.

In this embodiment, the formwork element a flat formwork sheet 1 with a thickness of, for example, about 3 mm and a back sheet 2 with parallel transverse ribs 3 on. In order to assemble the formwork element with the formwork element, edges 4 are attached to the end faces of the two metal sheets 1 and 2 welded on, with the layer 6 made of polyurethane foam between them take up. To withstand the pressure of the concrete 11, if the formwork element is based on a conventional

9827/0381

Dipl.-Phys. Heinrich Seids · Patent Attorney · 62 Wiesbaden · Bierstadter Höhe 15 · P.O. Box 120 68 · Telephone (0 6121) 56 53

borrowed support structure 12 from that with an adjustment device 13 for the vertical position and a catwalk 14 etc. is equipped. The formwork element is through with the opposite formwork element (not shown) conventional bolts connected through the passages 16 of the support structure 12 and the formwork element step.

All features of the subject of the application reproduced in the description, the claims and the drawing can be of essential importance for the invention on their own or in any conceivable combination be.

309827/0381

Claims (6)

Dipl.-Phys. Heinrich Seids · Patent Attorney ■ 62 Wiesbaden ■ Bier? T.idter Höhe 15 · I'ostfadi 120 68 · Telephone (061 21) 56 53 Patents ns ρ r ü c h e (1.) Formwork element for concrete formwork, characterized in that that an actual Schalblecb (1) and a plastic layer (6), for example a Slides back plate made of high-density polyurethane foam, which is separated from it and arranged in parallel (2) are provided, the plastic layer (6) in the manner of a molding process with polymerization or Foaming between the sheets (1, 2) is formed by inserting the plastic between the Sheets (1, 2) the high internal pressure occurring during the polymerization or the foaming over the Sheets (1, 2) from the inner surfaces of the final surface condition of the shuttering sheet (1) and the back sheet (2) determining shape was added and the cohesion between the formwork sheet (1) and the back plate (2) essentially on the plastic itself or its adhesive properties after the polymerization or the foaming is based. 30 9827/0381 -9- Dipl.-Phys. Heinrich Seids · Patent Attorney · 62 Wiesbaden · Bierstadtei Höhe 15 ■ Postfach 120 68 · Telephone (0 6121) 56 5382 2. Formwork element according to claim 1, characterized in that by increasing the adhesion of the plastic the inner surfaces of the "two sheets (1, 2) are coated with a primary layer. 3. Formwork element according to claim 1, characterized in that that at the edges devices (4) for assembling (formwork elements on formwork elements) are welded to the two sheets, 4. Formwork element according to claim 3, characterized in that that the devices for assembling through the end face to the edges of the formwork element edges (4) are fastened to the metal sheets (1, 2) ″ by electrical spot welding. 5. Formwork element according to claim 1, characterized in that the back panel (2) is stiffened, "for example by means of molded parallel Ribs (3). - 10 30 9827/0381 Diploma Phys. Heinrich Scids ■ Patent attorney · t> 2 Wiesbaden · Bierstadttr Hohe I. "■ Costfmh ι: i-8 · TeU ion (OtU JIi : · νϊ · Μ <: - ίο -. 6. Formwork element according to one of claims 1 to 5, characterized in that a formwork sheet and a back sheet, which was previously made in terms of dimensions and shape have been prepared, with a space of desired width parallel to each other be arranged, this gap with polymerization or foamable plastic material and the plastic material in one, also the sheet metal receiving, the final Surface quality of the shuttering sheet and the supporting sheet-defining shape under support of the resulting internal pressure is polymerized or foamed through the inner surfaces of the mold. 309827/0381