JPH083268B2 - Method for manufacturing wooden formwork used for concrete structures - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a wooden form used for a concrete structure.

[0002]

2. Description of the Related Art Conventionally, a plywood is used for a formwork used to form a right-angled surface in a concrete structure, and an outer corner of the plywood is formed into an arc shape and an inner corner is made into a right angle by pressure processing. The outer corner arcuate surface of this bent material was cut by chamfering, and an embedded member having a right angled outer corner was embedded and adhered to the cut curved surface so that the outer corner became a right angle. Used a formwork.

[0003]

A mold of this kind formed as described above is used for bending plywood, and for chamfering the bent outer corner arc surface of the plywood. Since the mold was assembled by bonding and embedding the embedded member with the outer corners at right angles to the excised curved surface, it was not easy to form the mold and the mold could not be used repeatedly. In the present invention, it is intended to mass-produce a mold which is robust and can be repeatedly used without damage in a short time in a short time.

[0004]

In view of the above-mentioned drawbacks of the conventional mold manufacturing method, the present invention provides a V-shaped female die press with a V-shaped groove on the back surface of the film overlay plywood. Bending a decorative plywood into a V-shape at the groove, folding it over a V-shaped female mold, and then forming a triangular member, a semi-solid material with a filling property, or an inner corner angle of easily compressible foam plastic After placing the member on the V-shaped groove on the decorative board material, position a few layers of plywood coated with adhesive on the upper edge of the decorative board material, and before the adhesive of this plywood cures, the V-shaped male type When integrally formed by pressing with a press, the inner corner is right angle or obtuse angle, the outer corner is also right angle or obtuse angle, and the wooden form frame whose outer surface is covered with the film overlay plywood is easily formed by one pressing process. It is what is done.

[0005]

The present invention uses several layers of plywood coated with an adhesive on the mold, and presses the plywood into an arc-shaped outer corner and a right-angled or obtuse inner corner before the adhesive hardens. Form a folding mold so that At that time, the outer surface is covered with a smooth film paper, and a film overlay plywood having a V-shaped groove or an obtuse-angled groove at the center of the inner surface, a so-called decorative plywood is bent along the V-shaped groove, and the inner bent portion is Insert the inner corner forming member whose lower corner is equal to the inner corner of the decorative plywood, press the decorative plywood over the entire outer surface of the formwork, and bond them to form a right angle for both the outer corner and the inner corner. The wooden formwork is integrally formed in a short time by one press.

Moreover, since the plywood is bent and formed on the V-type female press pressure plate by the V-type male press, the plywood is bent by utilizing the repulsive force of the flat plywood. The characteristic is that the decorative plywood is tightly and firmly adhered to the outer surface of the plywood bending material during crimping. Also, since the V-shaped groove is provided on the inner surface of the decorative plywood, the angle of the V-shaped groove can be freely adjusted. By changing to, it is possible to easily manufacture a wooden formwork that keeps a sharp angle cleanly from right angles to obtuse angles in a short time according to the inner corner angle of the bent material.
In addition, at the time of pressing the mold, a gap is generated between the arc-shaped outer corner of the bending material and the inner bending surface of the decorative plywood,
Although it does not affect the use as a formwork,
From the point of view of appearance, a resin may be poured into this gap if necessary.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 2, at the center of the pressure receiving plate 9,
Female-type press 1 having V-shaped groove 2 formed at right angles
1, the outer surface of FIG. 1 is covered with a smooth film paper, and the decorative plywood 3 provided with a V-shaped groove 10 in the center of the inner surface of the pressure receiving plate 9 of the female press 1. V-shaped groove 2
Then, the inner corner forming member 4 made of expanded polystyrene having a triangular shape is inserted as a reinforcing member in the inner right-angled portion 14 of the folded V-shaped groove 10 along the V-shaped groove 10 inwardly. From the above, the plywood 6 in which several layers of thin plates 7 are adhered by the adhesive 5 is positioned on the upper edge of the decorative plywood 3, and pressure is applied by the V-shaped male press 8 before the adhesive 5 is cured. Thus, the wooden formwork 13 used for the concrete structure in which the inner corner portion 11 is right angled and the outer corner portion 12 is also right angled is manufactured.

Since the material and shape of the outer corner arcuate surface of the bending material 6 and the inner corner angle forming member 4 which enters the gap between the folded decorative plywood 3 are arbitrary, the outer corner arcing surface of the bending material 6 is arbitrary. Then, even if a resin or foamed resin material is filled into the gap between the folded decorative plywood 3 after press molding, it becomes a similarly strong reinforcing material. Also, the decorative plywood is a film overlay plywood,
The same effect can be obtained with a vinyl chloride resin sheet material having a smooth surface, a laminated decorative board, or the like.

[0009]

Industrial Applicability According to the present invention, a triangular member or a semi-solid substance having a filling property is formed on the arcuate surface of the outer corner of the plywood formed when the plywood is bent by pressing as described above, or A decorative plywood with V-shaped grooves or obtuse-angled grooves formed in the center of the inner surface by crimping an inner corner angle forming member made of foamed plastic
Formed by bending inward around the groove and press-bonding and adhering to the outer surface of the plywood folded material, it is easy to form, robust and does not damage, and the outer surface is covered with decorative plywood Since the outer corners of the bending material do not lose their shape while maintaining a right angle for a long period of time, no reinforcing material is required, and when using the formwork according to the present invention, the concrete structure It has the feature that the right-angled surface can be easily and completely molded and can be used repeatedly. Further, since the molding is performed by one pressing operation, it is possible to efficiently and inexpensively provide the wooden formwork used for the concrete structure, which leads to labor saving and cost reduction.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a decorative plywood.

FIG. 2 is an exploded explanatory view of press working.

FIG. 3 is a partially cutaway perspective view of a mold formed by the manufacturing method according to the present invention.

[Explanation of symbols]

 1 V type female press 2 V type groove 3 Decorative plywood 4 Inner corner angle forming member 5 Adhesive 6 Plywood 7 Thin plate 8 V type male press 9 Pressure plate 10 V-shaped groove 11 Form frame inner corner right angle part 12 Formwork outside corner right angle part 13 Wooden formwork 14 V-shaped groove inside corner right angle part

Claims (1)

[Claims] 1. A V-shaped female press is used to form a decorative plywood having a V-shaped groove on the back surface of a film overlay plywood at the groove portion.
After bending into a mold and folding on a V-shaped female mold, a triangular member, or a semi-solid substance having a filling property, or a foamed plastic inner angle forming member is placed on a decorative plate material. After placing it on the V-shaped groove part, place several layers of plywood coated with adhesive on the upper edge of the decorative plate material, press it with a V-type male press before the adhesive of this plywood does not harden A method of manufacturing a wooden formwork used for a concrete structure, which is characterized by being integrally formed.