JP2002327532A - Concrete form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To considerably increase the reuse frequency of a form to reduce a construction cost in view of a problem that the reuse frequency of the form is reduced by the easy exfoliation of a paint film applied to the surface of the form, and to reduce the degree of the form becoming industrial waste. SOLUTION: Alumite treatment is applied to an aluminum forming base of this form constituted using an aluminum plate for the forming base for placing and forming concrete, and a paint film is applied to the upper surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold used as a framework for stamping and forming concrete when constructing a concrete structure.

[0002]

2. Description of the Related Art When constructing a concrete wall or floor slab using a concrete formwork, a metal formwork is used. The surface of the mold used in such a case has a release agent applied to the surface of the face plate in contact with the concrete in the mold so that the mold is easily separated from the concrete after the concrete has solidified.

[0003]

However, when a face plate is formed by directly applying a coating on a metal molded substrate, the coating is easily peeled off (see, for example, JP-A-8-240001). In particular, in the case of an aluminum molded substrate that is lightweight and easy to handle, there is a problem that a part of the release agent applied to the molded substrate surface flows because the surface of the molded substrate is smooth. . Further, when the ready-mixed concrete is poured into the molding space formed by the mold, there is a problem that the release agent is flown together with the flow of the concrete. Furthermore, even when lacquer coating with strong adhesion is directly applied as a peeling agent to an aluminum molded substrate, according to experiments, the problem that the coating film is peeled off with only one use for concrete casting. There was a point. As described above, even when the release agent is applied, the release material is reduced to an appropriate amount or less on the entire surface or a part thereof, and a desired concrete release effect cannot be obtained. In addition, since concrete adheres to the face plate in some places, the solidified concrete surface and the concrete may be partially lost.

Further, in the case of a molded substrate made of an aluminum plate, the surface of the molded substrate is roughened with a grinder as described in the above-mentioned known example, and then a release agent for aluminum is applied, or roughening is performed. Similarly, even if lacquer is applied to the polished surface, the desired concrete peeling effect cannot be obtained at the site, the solidified concrete surface also becomes rough and rough, and concrete is sometimes applied to the face plate. Because of the adhesion, the concrete surface that has solidified and the concrete has been partially lost. In addition, a large amount of labor is required to repair the solidified concrete surface and to remove the concrete adhered to the face plate of the formwork, and the number of times the formwork is diverted is reduced, resulting in an increase in cost. .

[0005] The concrete form of the present application is provided to solve the above-mentioned problems of the prior art. An object of the present application is to apply a treatment to the surface of a molding substrate of a concrete casting mold made of aluminum so that the mold can be peeled off from the concrete surface easily and without damage at the time of dismantling the mold. It is intended to provide a concrete form that can be made. Another object is to provide a concrete formwork capable of finishing the concrete surface in a smooth state, thereby reducing the need for repair of the concrete building surface. Another object of the present invention is to provide a concrete formwork in which a coating film applied on the upper surface of a molded substrate is hard to peel off, and the number of times of formwork reuse can be greatly increased to reduce the construction cost. Other objects and advantages will be more readily apparent from the drawings and the following description associated therewith.

[0006]

SUMMARY OF THE INVENTION A concrete formwork according to the present invention is a mold formed by using an aluminum plate as a molding substrate for stamping and molding concrete. Is subjected to alumite treatment, and the upper surface is coated with a coating film.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention. 1 and 2, reference numeral 1 denotes an example of a formwork used as a framework for driving and molding concrete. The outer shape of the formwork has a variety of shapes as conventionally known, since the outer shape of the form corresponds to the outer shape of a building or a structure using concrete. In addition, the configuration of the normal formwork includes a molded substrate 7 having a strength for maintaining the shape of the external surface of the concrete by contacting the cast surface with the concrete surface in order to mold the concrete. Reinforcing materials of any structure for maintaining the shape, for example, side bars 3 at the left and right ends, upper bars 4 and lower bars 5 at the upper and lower ends, and a middle bar 6 which is additionally provided as necessary, are integrally formed. Or freely assembling and dismantling. As the material used for the mold, there have been many materials using wood, but recently many metal materials have been provided. Particularly, in the present application, the mold is formed by using an aluminum material because it is lightweight and easy to handle.

The molded substrate 7 supports fluid concrete at the time of casting and serves as a concrete molding surface, so that it is generally called a face plate. FIG. 2 is a partially enlarged cross-sectional view of the face plate 2 according to the embodiment of the present invention, in which a hard alumite layer 8 is formed on the surface of a molded substrate 7 made of an aluminum material having sufficient space for supporting a concrete surface and having sufficient strength. , On top of which aluminum is prone to corrosion,
In addition, it is constituted by applying a coating film 9 having a peeling effect so that the solidified concrete does not adhere.

As shown in the partially enlarged sectional view, the face plate 2 is made of an aluminum plate (for example, 4 mm to 6 mm) having a thickness sufficient to obtain sufficient strength as a molded substrate 7 made of aluminum.
) Thick plate. Then, a hard alumite layer 8 was interposed between the aluminum substrate 7 and the coating film coating 9. The hard alumite layer 8 formed on the surface of the aluminum substrate 7 is formed by forming an aluminum oxide film on the surface of the aluminum plate 7 by a commonly known means so that the alumite layer becomes 6 μm or more. As the coating film coating 9, an acrylic resin is applied by any means, for example, brushing or spray coating, or an arbitrary synthetic resin paint is subjected to electrodeposition coating and baking, or is subjected to electrochemical coating. The film coating 9 is made to be 7 μm or more by using a method such as a method of forming an aluminum oxide film and a transparent synthetic resin film on the surface layer of aluminum by electrochemical treatment (forming an anodic oxidation coating film). Prepared for.

[0010] In the above-mentioned structure, a hard alumite layer 8 is interposed between the aluminum substrate 7 and the coating film 9 as shown in FIG. The hard alumite layer 8 is integrally formed on the surface of the aluminum alloy, and a large number of fine holes are formed on the surface of the hard alumite layer 8. Therefore, the anchoring effect of the coating film 9 on the aluminum base material is significantly increased, and peeling of the coating film having an arbitrary structure, for example, the coating film coating 9 can be prevented. According to experiments in the field, even if the form according to the embodiment of the present invention is used 10 to 15 times, the solidified concrete surface can maintain a smooth skin state, and the peeling action from the concrete is sufficient. Concrete did not adhere to the face plate surface 6 of the formwork.

[0011]

As described above, according to the present invention, since the coating film is formed on the upper surface of the mold, it is possible to prevent the solidified concrete from adhering to the mold, and also to make the concrete surface smooth. The condition can be finished, which has the effect of reducing the need for repair of the concrete building surface.

Further, according to the present invention, when a coating film is applied to the upper surface of the mold, the alumite treatment 8 is applied to the surface of the aluminum molded substrate 7 in advance, so that the coating film applied to the upper surface is difficult to peel off. Not only has the effect of significantly reducing the number of times formwork can be used to reduce construction costs, but also significantly reduces the degree to which formwork becomes unusable and becomes industrial waste. Has a positive effect.

[Brief description of the drawings]

FIG. 1A is a perspective view of a formwork viewed from a casting surface side.
(B) is a perspective view seen from the back side of the mold.

FIG. 2 is a partially enlarged sectional view of a face plate of a mold.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Form frame, 2 ... Face plate, 6 ... Surface, 7 ... Molding board ... 8 ... Hard alumite layer, 9 ... Coating.

Claims (2)

[Claims] 1. A mold which is formed by using an aluminum plate as a molding substrate in order to cast and mold concrete, the surface of the aluminum molding substrate of the mold is subjected to alumite treatment, and a coating film is formed on the upper surface thereof. Concrete formwork characterized by being given. 2. A mold which is formed by using an aluminum plate as a molding substrate in order to drive and form concrete, comprising a hard alumite layer formed by subjecting a surface of the aluminum molding substrate of the mold to an alumite treatment. Let
Furthermore, a concrete formwork provided with a coating film on its upper surface which is electrodeposited with a synthetic resin paint and baked.