JPH074027A - Production of concrete product with rugged pattern and decorative paper form therefor - Google Patents

Abstract

PURPOSE:To increase workability, by placing concrete in a decorative paper form provided with a water absorptive layer on a transcribing face of a rugged pattern formed on the surface thereof and obtaining a concrete product having the rugged pattern after its curing. CONSTITUTION:A decorative paper form 20 of which surface 30 serves as a transcribing face of a rugged pattern against the concrete surface is formed by use of a compression molding 20a made of paper, having the nearly uniform thickness and the rugged pattern. A water absorptive layer 20c made of a water soluble resin, etc., is formed on the transcribing face 30 of rugged pattern and a reinforcing material 20b is charged in the rear side of molding 20a to make the rear face 31 flat. Next, this decorative paper form 20 is parallelly assembled to the wall face of a concrete structure and concrete is poured in the inside space and cured to form a concrete wall surface with a rugged pattern. Accordingly, the decorative paper form can be incinerated without bringing about environmental pollusion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a concrete product having a concavo-convex pattern in which the surface of a concrete wall surface, a lightweight foamed concrete plate or the like is provided with a concavo-convex pattern, and a formwork used therefor.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, a resin-made design mold 21 having a predetermined concave-convex pattern is formed on a resin mold, a rubber, a cement, etc. as shown in FIG. After filling with a molding material 22 such as, etc., and curing, the mold is removed, and as shown in FIG. 8, a decorative mold 23 having a concavo-convex pattern formed on its surface is made. Next, as shown in FIG.
The decorative molds 23 are arranged on a substrate 24 made of plywood or the like and fixed from the back side to form a mold 25. This formwork 25
Are assembled in parallel to the wall surface 26 of the target concrete structure at a predetermined interval to close the gap between the side surface and the bottom surface, and then the concrete material 27 is placed in the internal space.
After casting and curing, the mold 25 is removed, whereby an uneven pattern can be formed on the wall surface 26. Then, the removed formwork 25 is disposed of as it is without being reused, because the surroundings are contaminated by the protruding concrete material 27 or damaged at the time of removal.

[0003]

However, in the discarded formwork 25, the substrate 24 is made of plywood or the like, so that it can be easily incinerated, but it is made of resin or rubber. When the incinerator 23 is burned, toxic gas or harmful by-products may be generated, and its treatment is a big problem from the viewpoint of environmental protection. Therefore,
Various methods for repeatedly using the decorative mold 23 have been studied, but it is a fact that effective measures cannot be obtained because it requires time and labor for construction.

The present invention has been made in view of the above circumstances, and provides a method for producing an excellent concrete product having a concave-convex pattern in which the used mold does not cause environmental pollution, and a paper decorative mold used therefor. Is its purpose.

[0005]

In order to achieve the above object, the present invention provides a paper decorative formwork having an uneven pattern transfer surface formed on its surface and a water absorbing layer formed on the uneven pattern transfer surface. Then, the surface of the paper decorative form is used as a contact surface for the concrete surface, a concrete material is poured and hardened, and then the paper decorative form is removed to obtain a concrete product having an uneven pattern transferred to the surface. The first gist is the method for producing a concrete product with a concavo-convex pattern, which is characterized in that A second aspect of the present invention is a paper decorative formwork, which is formed and has a back surface flattened by filling a reinforcing member in the recess on the back side thereof.

[0006]

That is, the inventor of the present invention uses a paper mold instead of the resin or rubber mold that has been conventionally used as a mold for imparting an uneven pattern to the concrete surface. Recalling that the paper formwork can be incinerated without causing environmental pollution after being used for producing a concrete product with an uneven pattern, and the efficiency is good. However, since there has been no practical method for making a decorative form from paper, we have continued to study this method. As a result, the raw material in which pulp, waste paper, etc. are melted is pressure-injected into the mold formed by the porous elastic body with continuous pores, and if it is sucked and dehydrated, the paper material is compression molded into an uneven pattern with a substantially uniform thickness. It was found that the obtained paper molded product can be easily obtained. However, if the above paper molded product is used as it is as a mold, the paper uneven portion may be deformed by concrete pressure during concrete placement. Granular paper materials, wood chips, etc. were filled in the side recesses to flatten the back surface. Also, when the paper mold and the concrete material come into direct contact with each other, the paper mold absorbs moisture in the concrete material to dissolve the fibrous material of the paper, destroy the uneven pattern, or destroy the mold during demolding. In some cases, the frame fragments adhere to the concrete surface and cannot be removed.Therefore, a water-absorbing layer is provided on the surface of the above-mentioned paper molded product, and this water-absorbing layer absorbs moisture in the concrete material to make the paper molded product It was designed to suppress the migration of water into the. As a result, the paper molded product will not dissolve due to moisture, and the concrete material will harden while the mold strength of the paper molded product is maintained. They have found that they can be easily demolded without being destroyed, and reached the present invention.

Next, the present invention will be described in detail based on examples.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows a partial cross section of an embodiment of a paper decorative mold used in the present invention. This paper makeup mold 2
No. 0 includes a molded product 20a in which a paper material is compression-molded into an uneven pattern having a substantially uniform thickness, and the surface 30 thereof is an uneven pattern transfer surface to the concrete surface. A water absorbing layer 20c made of a water-soluble resin or the like is formed on the uneven pattern transfer surface 30, and a reinforcing material 20b for reinforcing the unevenness of the molded product 20a is provided in the recess on the back side of the molded product 20a.
Are filled in, and the back surface 31 is flattened.

A molded product 20a made of the above paper material is obtained, for example, as follows. First, a molding die as shown in FIG. 2 is prepared. This mold has a side plate 3 around the bottom plate 2.
Lower mold seal frame 1 which is equipped with and is tightened with bolts 4.
And an upper mold seal frame 10 having a similar configuration,
Inside each of them, a lower mold 5 made of a rubber sponge and made of a porous elastic body with continuous pores, and an upper mold 5 ', which is similar, are fitted. However, the lower mold 5 and the upper mold 5 ′ are held in a state of being lifted by a crosspiece 7 so as to maintain a constant space 6 with the seal frames 1 and 10. Then, the upper and lower molds 5'and 5 are formed on the mold surfaces with concave and convex portions that are engaged with each other with a predetermined gap therebetween to form the concave and convex pattern forming space 8.

Reference numeral 11 denotes a molding material tank, which is a pipe 1
A raw material 13 for papermaking, which is a molding material, is pressure-molded into the molding space 8 via 2. Reference numeral 14 denotes a suction / discharge pipe provided with a three-way valve 16, and by switching the three-way valve 16, at the time of molding, as shown by an arrow A, the voids 6 in both the seal frames 1 and 10 are sucked and dewatered, and the mold 5 ，
The raw material 13 in the molding space 8 is sucked and dehydrated through the continuous pores 5 ', and when the mold is released, conversely, pressurized air is discharged into the molding space 8 as shown by an arrow B. A packing 15 is attached to the boundary surface between the upper and lower seal frames 1 and 10 and serves to seal the inside of both seal frames 1 and 10.

Using the above-mentioned forming die, first, in the closed state as shown in the drawing, while applying pressure from the vertical direction as shown by arrow C, the same raw material 13 as that used in ordinary papermaking is formed in the forming space 8
Cast at a predetermined pressure inside. Next, suction / discharge pipe 1
Vacuum suction is performed from 4 as indicated by an arrow A, and the state is maintained for a predetermined time to suction and dehydrate the raw material 13 in the molding space 8. At this time, even if the suction and dehydration are performed at a considerable degree of vacuum, the suction force is appropriately alleviated through the continuous pores of the porous elastic body with continuous pores of the upper die 5 ′ and the lower die 5 and the inside of the molding space 8 is reduced. Be transmitted to. Therefore, the suction force in the suction dehydration does not adversely affect the molding of the raw material 13.
After the suction and dehydration, the three-way valve 16 is switched to blow pressurized air into the molding space 8 and the upper mold seal frame 1
Remove 0 and open the upper mold 5 ', and take out the molded product. Then, the molded product can be sufficiently dried to obtain a molded product 20a as shown in FIG. This molded product 20a
Has an uneven pattern with a substantially uniform thickness as a whole.

Next, as the reinforcing material 20b (returning to FIG. 1) to be filled on the back side of the molded product 20a, for example, a granular paper material is prepared. Then, the filling into the recess is performed as follows. That is, first, the molded product 20
Turn a over. Also, the reinforcing material 20 to be filled
b is mixed with a sizing agent such as polyvinyl alcohol in a wet state to give a sticky state. Next, the reinforcing material 2 with a paste
0b is filled in the recess of the molded product 20a, and the reinforcing material 20b
After the surface of the layers (the back surface as a formwork) is flattened and flattened, the reinforcing material 20b is dried by leaving it for a predetermined time, and the reinforcing materials 20b and the reinforcing material 20b and the molded article 20 made of paper 20
and a are fixed.

Next, the concave-convex pattern transfer surface 30 of the molded product 20a whose back side is reinforced by the reinforcing member 20b is brushed or sprayed with an aqueous liquid of a water-soluble resin (for example, polyvinyl alcohol). After being uniformly applied to a thickness of 0.05 to 2.0 mm, it is left to stand for a predetermined time and dried. As a result, a film-shaped water absorbing layer 20c is formed on the surface of the molded product 20a. In this way, the paper decorative formwork 20 as shown in FIG. 1 can be obtained.

The decorative paper frame 20 thus obtained
In the same manner as in the past, assembling parallel to the wall surface of the target concrete structure, keeping a predetermined interval, closing the gap between the side surface and the bottom surface, and then pouring the concrete material into the internal space to cure it. . This state is shown in FIG. 4 (26 is a concrete wall surface, 40 is an uneven pattern portion obtained by curing). Then, by removing the paper-made decorative frame 20, as shown in FIG. 5, it is possible to obtain a concrete wall surface 40a with an uneven pattern.

The decorative paper frame 20 can be easily removed. That is, the water absorption layer 20c formed on the surface of the molded paper product 20a controls the absorption of water in the concrete material of the decorative paper mold 20. This is because the shape can be retained and the demolding can be performed smoothly. For this reason, the paper molded product 20a on the concrete wall surface
The uneven pattern of can be accurately transferred. Further, by forming the water absorbing layer 20c, air bubbles in the concrete material are destroyed when absorbing water, and the concrete material is closely packed, so that the void phenomenon due to bubble traces on the concrete surface is eliminated. You can get it.

Then, the removed paper decorative formwork 20 is
All are made of paper that is harmless to the environment, and the sizing agent used for fixing the reinforcing material 20b is also harmless, so that it can be incinerated as it is without causing environmental pollution. The water absorbing layer 20c formed on the surface of the paper molded product 20a comes into contact with the water in the concrete material and has already dissolved and disappeared when the mold is removed from the mold.

A molded product 20a of the decorative paper frame 20 is made.
Is not limited to the molding die shown in FIG. 2, and any molding die may be used. However, the thickness of the molded product 20a is set to 1 to 10 mm.

Further, as the reinforcing material 20b for reinforcing the molded product 20a from the back surface side, a granular paper material is used in the above embodiment, but the invention is not limited to this, and a wood piece, a corrugated cardboard piece, etc.
It does not matter as long as it burns without pollution. The use of resin particles, rubber particles and the like is not suitable from the point of the present invention, since they cause environmental pollution during incineration.

Further, it is preferable to use a water-soluble resin as the water absorbing layer 20c, and it is not limited to the polyvinyl alcohol exemplified above, and any material having a water absorbing property can be used. It doesn't matter. However, by adjusting the molecular weight, layer thickness, etc. to appropriate values,
It is desirable that the water absorption rate and the water absorption amount of the water in the concrete material into the paper molded product 20a can be controlled. The water absorbing layer 20c is preferably formed as thin as possible in order to accurately transfer the uneven pattern of the paper molded product 20a.

Further, in the above embodiment, the molded article 2 made of paper is used.
The combination product of 0a, the reinforcing material 20b, and the water absorption layer 20c was used as it is for the on-site construction as the paper decorative form 20, but, for example, as shown in FIG. Reinforcing material 20b is filled in a state of flipping, and a molded article 20a made of paper is pressed and attached from above, and the water absorbing layer 20c is attached to the surface 30 in the same manner as described above.
Then, the outer peripheral portion of the molded product 20a may be fixed to the frame body 50 to obtain the paper decorative mold frame 20 with the frame body 50. According to this method, each reinforcing member 20b
It is possible to save the time and effort to fix each other and the reinforcing material 20b and the molded product 20a with each other by using a paste or the like.

Further, in the above embodiment, the paper decorative formwork 20 is used.
Was used for on-site construction, but it can also be used in a factory or the like for mass production of a light-weight foamed concrete board with an uneven pattern.

[0022]

As described above, according to the present invention, a paper frame is used instead of a resin or rubber frame as a frame for imparting an uneven pattern. Therefore, according to the present invention, since the lightweight and easy-to-handle paper decorative formwork is used, workability is good and quick work can be performed. Then, a water absorption layer is provided on the surface of the paper molded article, and the water absorption layer absorbs the water in the concrete material to suppress the migration of water to the paper molded article. Without dissolving
Since the concrete material cures in a state where the mold strength of the paper molded product is maintained, it is possible to easily remove the mold without breaking the uneven pattern at the time of curing and breaking the mold at the time of mold release. Moreover, there is an advantage that after the concrete product with the uneven pattern is manufactured, the used paper decorative mold can be incinerated as it is without causing environmental pollution.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of an embodiment of a paper decorative form used in the present invention.

FIG. 2 is an explanatory diagram of an example of a molding die used for manufacturing the paper decorative mold.

FIG. 3 is an explanatory view of a molded product molded by the molding die.

FIG. 4 is an explanatory view of a mode of using the paper decorative mold.

FIG. 5 is an explanatory view of a concrete wall surface with an uneven pattern obtained by using the paper decorative mold.

FIG. 6 is an explanatory view of another embodiment of the paper decorative formwork used in the present invention.

FIG. 7 is an explanatory view of a conventional makeup method.

FIG. 8 is an explanatory view of a conventional makeup type.

FIG. 9 is an explanatory diagram of a usage mode of the makeup type.

[Explanation of symbols]

 20 Paper Decorative Form 20a Molded Product 20b Reinforcing Material 20c Water Absorption Layer

Claims (2)

[Claims] 1. A paper decorative formwork having an uneven pattern transfer surface formed on its surface and a water absorbing layer formed on the uneven pattern transfer surface is prepared, and the surface of the paper decorative formwork is used as a contact surface for contacting a concrete surface. A method for producing a concrete product with a concavo-convex pattern, which comprises pouring and hardening a concrete material, and then removing the paper decorative form to obtain a concrete product having a concavo-convex pattern transferred to the surface. 2. A paper material is compression-molded into an uneven pattern having a substantially uniform thickness, a water absorbing layer is formed on the surface which becomes the uneven pattern transfer surface, and a reinforcing member is filled in the recess on the back side. A paper decorative formwork characterized in that its back surface is flattened.