JPH07103682B2 - Method for manufacturing curved decorative mat for concrete forming - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to the production of a curved decorative mat for concrete molding for forming a concrete layer having a curved surface on a curved concrete product or product. It is about the method.

[Conventional technology]

A curved concrete product may be manufactured, or a concrete layer formed on a curved surface having a concavo-convex pattern may be formed in a concrete structure or the like. In such a case, as shown in FIG. 7, the back surface 3 of the curved resin mat 2 made of resin having the uneven pattern 1 formed on the surface 3
Is attached to a wooden frame, etc. to form a formwork, and this formwork is assembled with another formwork, etc. to form a concrete layer forming space, and by pouring paste-like concrete into this space The practice is to form a concrete layer. And such a curved makeup mat 2
Is provided with a space 5 corresponding to the shape of the curved decorative mat 2 inside the mating mold 4 as shown in FIG. 8, and the space 6 is filled from the inlet 6 provided on the upper side of the space 5. It is manufactured by pouring a liquid resin material into.

[Problems to be solved by the invention]

However, in the method for manufacturing the curved decorative mat 2 as described above, when the liquid resin material is poured into the space portion 5 of the mating die 4, air is easily entrained in the resin material. Therefore, the obtained curved decorative mat 2 has problems that the strength is weak and the shape is poor. Also,
In some cases, it is preferable to increase the strength of the curved decorative mat 2 as described above, and for that purpose it is effective to put reinforcing fibers or the like inside, but this is difficult with the above manufacturing method. I also have. Furthermore, since the shape of the mating die 4 is complicated, it takes time to manufacture it,
Moreover, since a clamp, a bolt, or the like is used to fix the mating die 4, there is a problem that the work such as demolding is complicated.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a method for manufacturing a curved decorative mat for concrete molding, which enables easy production of a curved decorative mat of good quality.

[Means for solving problems]

In order to achieve the above-mentioned object, the method for producing a curved decorative mat for concrete molding is such that a sheet mat made of a thermosetting resin is semi-cured, and the surface is adhered to the surface of a mold having a curved surface. It is temporarily fixed in this state and secondarily cured in that state to form a curved surface along the curved surface.

[Action]

That is, this method for manufacturing a curved decorative mat for concrete forming does not manufacture a curved decorative mat of a predetermined shape using a mating mold as in the conventional example, but a semi-cured sheet-shaped mat formed in a flat shape. Is adhered to the curved surface of the mold, temporarily fixed, and then secondarily cured in that state to manufacture. As a result, there is no need for a complicated-shaped mating mold and tools for fixing it.
Only a simple flat mold for forming mats, a mold with a curved surface, and a temporary fixing tool such as a nail will be used. Therefore, the manufacturing work of the mold and the curved decorative mat can be facilitated. In addition, since the curved decorative mat is formed into a flat shape, air is not trapped inside. Furthermore, when increasing the strength of the curved decorative mat, reinforcing fibers and the like can be easily embedded inside thereof.

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

〔Example〕

FIG. 1 shows a makeup mat 11 used in one embodiment of the present invention. That is, the decorative mat 11 is a urethane resin sheet mat having an uneven pattern 12 on its surface, and is in a semi-cured state. The decorative mat 11 is positioned on the upper surface of the wooden mold 13 whose upper surface is dome-shaped as shown in FIG. 2 with the concave-convex pattern 12 on the surface, and the nail 14 is fixed as shown in FIG. It is attached to the wooden mold 13 by hitting it at intervals. In that state, leave it for a predetermined time,
Alternatively, the makeup mat 11 is secondarily cured by heat treatment or the like. Then, the corner 11a of the decorative mat 11 is placed in the wooden pattern 13
A curved makeup mat 2 similar to the curved makeup mat 2 shown in FIG. 7 can be obtained by cutting along the edge portion of with a knife or the like. The radius of the curved decorative mat 2 can be set to a minimum of about 200 mm. Further, in order to increase the strength of the curved decorative mat 2, a reinforcing material such as glass cloth is arranged in a plane forming frame when the semi-cured decorative mat 11 is manufactured. In that state, a liquid urethane resin is injected into the mold. Thereby, the curved makeup mat 2 having high strength can be obtained.

Similar to the conventional example, the curved decorative mat 2 is attached to a wooden frame or the like, and the space is formed by assembling it with another form or the like, and the paste-like concrete is poured into the space to provide a surface. It is possible to form a concrete layer having a curved surface having an uneven pattern.

As described above, according to the method for manufacturing the curved decorative mat 2, the planar decorative mat 11 is first manufactured, instead of manufacturing using the mating die 6 having a complicated shape as in the conventional example. It is possible to prevent air from being caught in the air.
Therefore, the obtained curved decorative mat 2 does not become weak in strength or have a poor shape due to air entrainment. Then, the decorative mat 11 is adhered to the wooden mold 13 in a semi-cured state, and secondary curing is performed in that state, so that the wooden mold 13 having a simple shape is prepared, and the mold is easily manufactured. Moreover, without using clamps or bolts to fix the mold,
By striking the nails 14, the decorative mat 11 is temporarily fixed to the wooden mold 13, which makes the work extremely easy. Further, when the strength of the curved decorative mat 2 is increased, reinforcing fibers or the like can be easily embedded inside thereof.

FIG. 4 shows a curved decorative mat 15 having an arc shape rather than a dome shape, and an uneven pattern 12a is formed on the curved concave side of the curved decorative mat 15. The manufacturing method of the curved decorative mat 15 is the same as that of the above embodiment, and only the shape of the wooden mold 16 used is different. The action and effect are also the same as those in the above embodiment.

FIG. 5 shows a curved makeup mat 17 in which the concave-convex pattern 12a of the curved makeup mat 15 of FIG. 4 is provided on the convex side, and FIG. 7 shows a curved makeup mat 18 having an L-shaped cross section. ing. The radius of the corner of this curved makeup mat 18 is at least 5 m
It can be formed up to about m. These cases also have the same effects as those of the above embodiment. In addition to this, it is possible to form curved decorative mats of various shapes by changing the shape of the wooden mold.

As the material used for the curved decorative mat, any thermosetting resin can be used in addition to the urethane resin, as long as it is a thermosetting resin that can be released from the mold in a semi-cured state.

〔The invention's effect〕

As described above, according to the method for manufacturing a curved decorative mat for concrete molding of the present invention, a high-quality curved decorative mat can be easily manufactured without using a matching mold having a complicated shape.

[Brief description of drawings]

FIG. 1 is a perspective view of a decorative mat used in an embodiment of the present invention, FIG. 2 is a perspective view of a wooden mold, and FIG. 3 is a longitudinal sectional view showing a manufacturing method thereof, FIGS. 6 is a vertical sectional view showing a manufacturing method of another embodiment, FIG. 7 is a perspective view of a curved decorative mat, and FIG. 8 is a vertical sectional view of a conventional example. 2 ... Curved makeup mat, 11 ... Cosmetic mat, 13 ... Wooden pattern

Claims (1)

[Claims] 1. A sheet-like mat made of a thermosetting resin is semi-cured, temporarily fixed to a surface of a mold having a curved surface, in a state of being adhered, and secondarily cured in that state. A method for manufacturing a curved decorative mat for concrete molding, which comprises molding into a curved shape along the curved surface.