Formwork element for a formwork device

Abstract

A formwork element (10; 10') for a formwork device (30) for producing wall and / or ceiling sections in a fresh concrete construction, comprising: at least one carrier structure (11); at least one concrete-contacting layer (12); and at least one holding layer (13; 13') which comprises a structure of micro-suction cups, wherein the holding layer (13; 13') is located between the carrier structure (11) and the concrete-contacting layer (12) and wherein the holding layer (13; 13') is configured to hold.

Description

[0001] Formwork element for a formwork device

[0002] Field of the invention

[0003] The present invention relates to a formwork element for a formwork device and a use of a holding layer with a structure having micro suction cups for holding a support structure and a concrete-contacting layer relative to each other.

[0004] background

[0005] Formwork for the production of concrete components is generally known in the prior art. Such formwork can be used to provide casting molds, for example for ceilings or walls. Concrete can then be poured into these molds to produce a concrete component. After the concrete has hardened, the formwork is usually removed and prepared for the next use. In particular, formwork is known which is constructed in multiple layers and comprises, for example, a formwork panel made of a wood-based material and a formwork facing arranged thereon. The formwork panel can also be arranged on a frame or the like. A connection between the formwork panel and the formwork facing can be provided, for example, by means of snap-in and / or clip connections. However, such snap-in and / or clip connections do not allow a surface connection between the formwork panel and the formwork facing.Furthermore, changing the formwork skin, i.e., opening and closing the snap-in and / or clip connections, is labor-intensive and time-consuming. i In this context, it has become apparent that there is a further need to provide a solution for attaching a formwork skin to a formwork panel as simply as possible. In particular, there is a further need to provide a solution for easier and faster replacement of formwork skins.

[0006] It is therefore an object of the present invention to provide a solution for arranging a formwork skin on a formwork panel as simply as possible, in particular to provide a solution for replacing a formwork skin more easily and quickly.

[0007] These and other objects, which will be mentioned upon reading the following description or which may be recognized by a person skilled in the art, are achieved by the subject matter of the independent claims. The dependent claims develop the central idea of ​​the present invention in a particularly advantageous manner.

[0008] Summary of the invention

[0009] A first aspect of the present disclosure relates to a formwork element for a formwork device for producing wall and / or ceiling sections in fresh concrete construction, comprising: at least one support structure; at least one concrete-contacting layer; and at least one holding layer comprising a structure of micro-suction cups, wherein the holding layer is arranged between the support structure and the concrete-contacting layer and wherein the holding layer is configured to hold the support structure and the concrete-contacting layer relative to one another.

[0010] A formwork device or formwork within the meaning of the present disclosure is generally defined as any element that is suitable, individually or in combination with other elements, for providing a casting mold for concreting. Formwork can be designed, for example, as foundation formwork, wall formwork, column formwork, circular formwork, slab formwork, frame formwork, girder formwork, tunnel formwork, bridge formwork, special formwork, manual formwork, aluminum formwork, plastic formwork, or formwork for exposed concrete.

[0011] A formwork element within the meaning of the present disclosure can, for example, be provided by a composite of a support plate as a support structure, a wear layer in contact with the concrete, in particular a formwork skin, and a retaining layer arranged between the support structure and the layer in contact with the concrete, comprising a structure of micro-suction cups. Such a formwork element can be part of a formwork device, wherein the formwork device can comprise further elements, such as frame structures, further support structures, etc., into or to which a formwork element can be arranged or fastened. The retaining layer does not have to be arranged directly on the support structure and / or the layer in contact with the concrete, but further layers, structures, etc. can be provided between the support structure and the layer in contact with the concrete.

[0012] The term "support structure" within the meaning of the present disclosure is to be understood broadly and encompasses any structure functionally suitable for supporting a layer in contact with concrete, such as a formwork skin. In practice, such a support structure can be provided, for example, by a so-called base support plate or by one or more frame elements.

[0013] Both the support structure and the concrete-contacting layer can be provided from different materials, such as wood or plastic materials, or combinations thereof. The support structure and the concrete-contacting layer can be multi-layered or single-layered. For example, the concrete-contacting layer can be formed as a formwork skin with cross-laminated birch panels coated on one or both sides with a plastic layer. However, the present disclosure is not limited to a specific support structure and / or a specific concrete-contacting layer.

[0014] The holding layer with a structure of micro suction cups can fix the support structure and the layer in contact with the concrete relative to one another. The holding layer can, for example, be glued to the support structure or the layer in contact with the concrete. The component without the holding layer can then be pressed flat onto the holding layer, creating an appropriate holding force from the micro suction cups. This enables a flat connection between the support structure and the layer in contact with the concrete. Depending on the geometry of the micro suction cups and the number of micro suction cups per unit area, different holding forces can be provided by different holding layers. To separate the two components from each other, appropriate shear forces only need to be applied to one side / location, so that the two components can be separated again by shearing.As has been shown in practice, this type of shearing can be carried out quickly and easily, in particular much more easily and quickly than releasing the conventional snap-in and / or clip connections. Finally, the solution proposed here provides a simple and quick way to create different surfaces, such as exposed concrete surfaces, textured surfaces, etc., by changing the layer in contact with the concrete. In practice, it has also been shown that the use of the retaining layer enables a more robust connection between the support structure and the layer in contact with the concrete, since even in the event of local damage to the retaining layer, a surface connection between the support structure and the layer in contact with the concrete is still possible.

[0015] In alternative embodiments, the retaining layer can be formed with micro-suction cups on one or both sides. This makes it possible, for example, in the single-sided version to adhere the retaining layer to the support structure or the layer in contact with the concrete and press the other component flat onto the retaining layer. Alternatively, in the double-sided version, it is also possible to first press the retaining layer onto the support structure or the layer in contact with the concrete and then press the other component flat onto the retaining layer.

[0016] In one embodiment, the micro suction cups have a crater-shaped geometry that is incorporated into the holding layer. Such micro suction cups or crater-shaped geometries can be incorporated into the holding layer, for example, by an embossing process.

[0017] In one embodiment, the holding layer has a thickness between 100 and 450 pm, preferably between 130 and 350 pm and particularly preferably between 140 and 160 pm. In one embodiment, the micro suction cups have a diameter between 25 and 150 pm, preferably between 40 and 80 pm and particularly preferably between 45 and 55 pm. In one embodiment, the micro suction cups have a depth between 25 and 150 pm, preferably between 40 and 80 pm and particularly preferably between 45 and 55 pm. In practice, it has been found that such a geometry of the micro suction cups provides sufficient holding forces to fix typical support structures and typical concrete-contacting layers relative to one another in such a way that they cannot move relative to one another during use.

[0018] In one embodiment, the holding layer is formed as a film, preferably made of a thermoplastic material, particularly preferably polypropylene. The stated geometry of the micro suction cups can be incorporated into such thermoplastic materials, particularly polypropylene films, for example, by an embossing process.

[0019] In one embodiment, the holding layer is arranged on the support structure or the layer in contact with the concrete. Such an arrangement can be achieved, for example, by an adhesive layer, i.e. the holding layer can be glued either to the support structure or to the layer in contact with the concrete. In one embodiment, a tolerance compensation layer is arranged between the support structure and the holding layer. In one embodiment, a tolerance compensation layer is arranged between the layer in contact with the concrete and the holding layer. In one embodiment, the tolerance compensation layer has a thickness of between 0.5 and 3.5 mm, preferably between 0.75 and 2.5 mm and particularly preferably between 0.8 and 1.2 mm. In one embodiment, the tolerance compensation layer is designed as a foam layer. Other compressible materials can be used as an alternative to the foam layer.Such a tolerance compensation layer makes it possible to compensate for production tolerances in a simple manner.

[0020] In one embodiment, the layer in contact with the concrete has a thickness between 4 and 30 mm, preferably between 8 and 20 mm, and particularly preferably between 9 and 18 mm. In one embodiment, the formwork element has a length between 0.50 and 5 m, preferably between 0.6 and 3.6 m, and a width between 0.2 and 3.5 m, preferably between 0.3 and 2.4 m.

[0021] In one embodiment, the support structure and / or the concrete-contacting layer is provided from a wood material, a coated wood material and / or a plastic.

[0022] In one embodiment, only one adhesive layer is provided between the retaining layer, the support structure, the concrete-contacting layer, and / or the tolerance compensation layer for securing the retaining layer. In other words, the formwork element in this embodiment has only one adhesive layer for securing the retaining layer. Alternatively, it is possible to provide additional fastening and / or fixing means, such as clamp elements, depending on the application and requirements.

[0023] A further aspect of the present disclosure relates to a formwork device for producing wall and / or ceiling sections in fresh concrete construction, wherein the formwork device comprises at least one formwork element as described above. For further details / configuration options for the formwork element, reference is made to the above explanations.

[0024] A further aspect of the present disclosure relates to the use of a retaining layer having a structure with micro-suction cups for retaining a support structure and a concrete-contacting layer relative to one another in a formwork element described above. For further details / configurations of the retaining layer, reference is made to the above explanations.

[0025] Description of a preferred embodiment

[0026] Further features, advantages, and possible applications of the present invention will become apparent from the following description, the exemplary embodiment, and the figures. In the figures, the same components are provided with the same reference numerals. They show:

[0027] Figure 1 shows an embodiment of an inventive

[0028] formwork element;

[0029] Figure 2 shows an embodiment of an inventive

[0030] Formwork device with the formwork element shown in Figure 1;

[0031] Figure 3 shows an embodiment of an inventive

[0032] Formwork device with a further embodiment of a formwork element; and

[0033] Figure 4 shows the formwork device shown in Figure 3 before fixing the concrete contact layer.

[0034] Figure 1 shows an embodiment of an inventive

[0035] Formwork element 10, wherein only a section of the formwork element 10 is shown in Figure 1. The formwork element 10 comprises a support structure 11, a concrete-contacting layer 12, and a retaining layer 13 arranged therebetween.

[0036] The holding layer 13 comprises a structure of micro suction cups (not shown) designed to hold / fix the support structure 11 and the concrete-contacting layer 12 relative to one another. In the preferred embodiment shown, the support structure 11 is provided as a so-called (base) support plate 11 with a multi-layer wooden core. The concrete-contacting layer 12 is provided in the preferred embodiment shown as a so-called formwork plate 12, comprising a multi-layer wooden core 14 and a plastic layer 15, the latter of which comes into direct contact with the concrete. In the embodiment shown in Figure 1, the holding layer 13 is connected to the concrete-contacting layer 12 by means of an adhesive layer (not shown). Alternatively, the holding layer 13 can also be attached to the support structure 11 by means of an adhesive layer or the like (see Figures 3 and 4).The holding layer 13 could also be formed with a structure of micro-buttons on its top and bottom sides, so that the holding layer 13 would not have to be glued in such a design.

[0037] The holding layer 13, which in the illustrated embodiment is formed as a polypropylene plastic film, has a thickness of approximately between 140 and 160 μm. The micro suction cups have a diameter of between approximately 45 and 55 μm and a depth of approximately between 45 and 55 μm. This provides sufficient holding forces to fix the support structure 11 and the concrete-contacting layer 12 relative to each other in such a way that they cannot move relative to each other during use.

[0038] A tolerance compensation layer (not shown), for example a foam layer, can also be arranged between the support structure 11 and the holding layer 13. Alternatively, it is possible to arrange a tolerance compensation layer between the layer 12 in contact with the concrete and the holding layer 13. Such a tolerance compensation layer can, for example, be provided with a thickness between 0.8 and 1.2 mm. In the preferred embodiment, the layer 12 in contact with the concrete has a thickness between approximately 9 and 18 mm. In the embodiment shown, the formwork element 10 has a length between approximately 0.6 and 3.6 m and a width between approximately 0.3 and 2.4 m.

[0039] Figure 2 shows an embodiment of a formwork device 30 with a formwork element 10 shown in Figure 1. The formwork element 10 is fastened to a frame structure 31, wherein different sealing elements 32 can also be provided in order to seal the casting mold formed by the formwork device 30 accordingly.

[0040] Figure 3 shows a further embodiment of a formwork device 30 according to the invention with a further configuration of a formwork element 10'. In contrast to the embodiment shown in Figures 1 and 2, in the embodiment shown in Figure 3, a holding layer 13' is provided which is not provided on the concrete-contacting layer 12, but on the support structure 11.

[0041] Figure 4 shows the embodiment of the formwork device from Figure 3, wherein the concrete-contacting layer 12 is not arranged on the support structure 11. The concrete-contacting layer 12 can be pressed onto the holding layer 13' until a flat connection is established between the holding layer 13' and the concrete-contacting layer 12.

[0042] With the proposed solution, the support structure 11 and the concrete-contacting layer 12 can be easily connected to one another and separated again by (lateral) shearing. Such shearing can be carried out easily and quickly, so that considerable time and cost savings can be achieved. The present invention is not limited to the embodiment described above, as long as it is encompassed by the subject matter of the following claims. In addition, it is pointed out that the terms "comprising" and "having" do not exclude other elements or steps, and the indefinite articles "a" or "an" do not exclude a plurality. Furthermore, it is pointed out that features or steps described with reference to the above embodiments can also be used in combination with other features.

[0043] List of reference symbols

[0044] 10, 10' formwork element for a formwork device

[0045] 11 Support structure 12 Concrete contact layer

[0046] 13, 13' holding layer

[0047] 14 multi-layer wood core

[0048] 15 plastic layer

[0049] 30 Formwork device / formwork 31 Frame structure

[0050] 32 Sealing element

Claims

Claims 1. Formwork element (10; 10') for a formwork device (30) for producing wall and / or ceiling sections in fresh concrete construction, comprising: at least one support structure (11); at least one layer (12) in contact with the concrete; and at least one holding layer (13; 13') comprising a structure of micro suction cups, wherein the holding layer (13; 13') is arranged between the support structure (11) and the layer (12) in contact with the concrete, and wherein the holding layer (13; 13') is to be held.

2. Formwork element (10; 10') according to claim 1, wherein the micro-buttons have a crater-shaped geometry which is introduced into the holding layer (13; 13').

3. Formwork element (10; 10') according to claim 1 or claim 2, wherein the holding layer (13; 13') has a thickness between 100 and 450 pm, preferably between 130 and 350 pm and particularly preferably between 140 and 160 pm.

4. Formwork element (10; 10') according to one of the preceding claims, wherein the micro suction cups have a diameter between 25 and 150 pm, preferably between 40 and 80 pm and particularly preferably between 45 and 55 pm.

5. Formwork element (10; 10') according to one of the preceding claims, wherein the micro suction cups have a depth between 25 and 150 pm, preferably between 40 and 80 pm and particularly preferably between 45 and 55 pm.

6. Formwork element (10; 10') according to one of the preceding claims, wherein the holding layer (13; 13') is designed as a film, which is preferably made of a thermoplastic material and particularly preferably of polypropylene.

7. Formwork element (10; 10') according to one of the preceding claims, wherein the holding layer (13; 13') is arranged on the support structure (11) or the layer in contact with the concrete, preferably by means of an adhesive layer on the support structure (11) or the layer in contact with the concrete.

8. Formwork element (10; 10') according to one of the preceding claims, wherein a tolerance compensation layer is arranged between the support structure (11) and the holding layer (13; 13').

9. Formwork element (10; 10') according to one of the preceding claims, wherein a tolerance compensation layer is arranged between the layer in contact with the concrete and the holding layer (13; 13').

10. Formwork element (10; 10') according to claim 8 or claim 9, wherein the tolerance compensation layer has a thickness between 0.5 and 3.5 mm, preferably between 0.75 and 2.5 mm and particularly preferably between 0.8 and 1.2 mm, wherein the tolerance compensation layer is preferably formed as a foam layer.

11. Formwork element (10; 10') according to one of the preceding claims, wherein the concrete-contacting layer (12) has a thickness between 4 and 30 mm, preferably between 8 and 20 mm and particularly preferably between 9 and 18 mm.

12. Formwork element (10; 10') according to one of the preceding claims, wherein the formwork element (10; 10') has a length between 0.50 and 5 m, preferably between 0.6 and 3.6 m and a width between 0.2 and 3.5 m, preferably between 0.3 and 2.4 m.

13. Formwork element (10; 10') according to one of the preceding claims, wherein only one adhesive layer for fastening the holding layer (13; 13') is provided between the holding layer (13; 13'), the support structure (11), the concrete-contacting layer (12) and / or the tolerance compensation layer.

14. Formwork device (30) for producing wall and / or ceiling sections in fresh concrete construction, wherein the formwork device (30) comprises at least one formwork element (10; 10') according to one of claims 1 to 13.

15. Use of a holding layer (13; 13') having a structure with micro-suction cups for holding a support structure (11) and a concrete-contacting layer (12) relative to each other in a formwork element (10; 10') according to one of claims 1 to 13.

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