JPH08230057A - Manufacture of artificial rock made of reinforced plastic - Google Patents

Abstract

PURPOSE: To easily produce a female mold without requiring a natural rock becoming a mold. CONSTITUTION: A sheet like mold material is formed into a bag shape and irregularly folded to form a large number of pleats 1a and subsequently returned to the original bag shape to form a female mold 1' and resin putty 3 is applied to the inner surface of the female mold 1' to fill the pleats 1a to form a smooth inner surface and, further, FRP 4 is laminated to the inner surface of the resin putty 3 and, after drying, the sheet like mold material is peeled to remove the female mold 1'.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a fiber reinforced plastic used for garden stones, interior decoration, models, etc.
It is called P. ) A method of manufacturing an artificial rock.

[0002]

2. Description of the Related Art Conventionally, as a method for producing an artificial rock of this type, as shown in FIG.
After cleaning the surface of the natural rock A, the mold release material B is applied to the surface, and the silicone rubber C for female mold is applied to the surface. After the silicone rubber has hardened, the female mold C ′ is peeled off from the natural rock, the resin D colored in the color of rock is applied to the inner face of the female mold C ′, and the inner face of the resin D is covered with FRP.
Are laminated. Then, after the FRP is cured, the female C '
An artificial rock can be made by peeling off.

[0003]

However, the above method is
In order to use the natural rock A as the original model, the large natural rock A was required when manufacturing a large artificial rock. When manufacturing artificial rocks of different shapes, natural rocks A
However, there is a problem that it is extremely difficult to prepare the natural rock A as a mold. There is also a problem that it takes time to manufacture a female mold made of silicon rubber.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a method for producing a reinforced plastic artificial rock which does not require natural rock and can perform a female type manufacturing process in a short time.

[0005]

In order to solve the above problems, the present invention forms a sheet-shaped mold material into a bag shape and folds the sheet-shaped mold material irregularly to form a large number of pleats, and then Return to the bag shape to make a female mold, apply resin putty to the inner surface of this female mold and fold it to form a smooth inner surface, then laminate the fiber reinforced resin on the inner surface of this resin putty, and after drying, sheet The female mold is removed by peeling the shaped mold material.

[0006] Further, the above sheet-shaped mold material uses a release paper or a synthetic resin film in which a paper material is coated with a synthetic resin.

[0007]

[Advantage] According to the above construction, since the folds that express the unevenness of the rock surface are formed on the surface of the sheet-shaped mold member by folding it irregularly to form a female shape, it is possible to use the natural rock which was conventionally required. It is possible to easily manufacture corners, large rocks and artificial rocks of any shape and taste, and it is possible to significantly shorten the molding time of the female mold and manufacture artificial rocks at low cost. .

Further, by using a release paper or a synthetic resin film in which the surface of a paper material is coated with a synthetic resin as the sheet-shaped mold material, it is possible to obtain appropriate strength, easy formation of folds, easy peeling and low cost. It is possible to obtain a sheet-shaped material having good performance suitable for a female type.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for manufacturing a reinforced plastic artificial rock according to the present invention will be described below with reference to the drawings.

As shown in FIG. 1, first, the sheet-shaped mold material 1 is formed into a bag shape. The bag-like shape may be a shape that follows the outline of the artificial rock to be formed, and is formed into, for example, a cylindrical shape or a truncated cone shape. Further, the material of the sheet-shaped mold material 1 has strength enough to hold the FRP as a female shape, and it can be easily removed (restored) by forming a fold 1a (FIG. 2) expressing the unevenness of the artificial rock by compression. A material that does not exist and can be easily torn and peeled off when the female die is removed is selected. For example, release paper or synthetic resin film is used. The release paper is a paper or cardboard coated with polyethylene resin or silicone resin, and is often used in the fields of heavy packaging bags, foods, pharmaceuticals, etc. There is wrapping paper. The synthetic resin film has a thickness of 0.02 to 0.25 mm.
Polyethylene film or polyester film,
Polycarbonate film and polypropylene film are suitable. If the thickness of the film is thinner than 0.02 mm, the strength as a female mold cannot be obtained and the folds 1a become too sharp, which is not suitable for expressing the unevenness of artificial rock, and 0.25 mm. This is because if the thickness is thicker, the pleats 1a become obtuse and it is difficult to express sharp ones, which is not suitable for expressing rocks, and a great deal of labor is required for demolding.

This sheet-shaped mold material 1 is compressed and folded in an irregular manner, and innumerable pleats 1a are formed on the surface thereof to express the unevenness of rocks, and the folds are re-expanded to form a bag-shaped female die 1'with pleats 1a. Form.

Further, as shown in FIG. 4, the opening 1b is fixed to the stand 2 with tape or the like with the bottom of the female mold 1'downward. Then, a resin putty 3 colored with a rock-colored toner (coloring material) is carefully applied to the inner surface of the female die 1 ′ from the opening 1 b along the fold 1 a with a brush or a trowel. The resin putty 3 is, for example, an unsaturated polyester resin kneaded into a paste by adding a filler such as talc, calcium carbonate, and fine silicic acid anhydride. As a result, as shown in FIG. The folds 1a are embedded to form a relatively smooth surface.

Next, the FRP 4 is laminated on the surface of the resin putty 3 so as to have a substantially constant thickness. As the lamination method, a resin liquid mixed with short glass fibers is sprayed from a nozzle by a spray device to be cured. The mat-shaped glass fiber is pressed against the surface of the resin putty 3 and the resin liquid is sprayed and impregnated with the spray device to cure the resin liquid. The matt glass fiber impregnated with the resin liquid is pressed against the surface of the resin putty 3 to be cured. Method is adopted.

Further, after the FRP 4 is hardened, the sheet-shaped mold material 1 is torn and peeled off, the female mold 1'is removed from the surface of the artificial rock 5 and the mold is removed to expose the artificial rock 5 shown in FIG. Since this sheet-shaped mold member 1 is made of release paper or synthetic resin film, it can be easily removed.

As described above, each artificial rock 5 is manufactured by forming the female mold 1'by the sheet-shaped mold material 1 one by one. According to the above examples: Since natural rock is not used, it is extremely advantageous in terms of cost and handling. 2. It eliminates the work of molding from natural rock, simplifies the manufacturing process, and shortens the work time. 3. Since the sheet-shaped mold material 1 is compressed and folded in an irregular manner, and innumerable pleats 1a expressing the unevenness of rocks are formed on the surface, unevenness of an arbitrary atmosphere can be easily formed,
It is possible to manufacture artificial rocks with different characteristics. 4. Even if it is a particularly large artificial rock, the female mold 1'can be easily manufactured and can be easily manufactured.

Although the resin putty 3 contains the coloring toner in the above embodiment, it is of course possible to use the resin putty 3 which does not contain the coloring toner and color it after releasing the mold.

[0017]

As described above, according to the method for producing a reinforced plastic artificial rock of the present invention, folds expressing irregularities on the surface of the rock by compressing and irregularly folding it are formed on the surface of the sheet-shaped member. Since it is formed into a female shape, it does not require the use of natural rock, which was conventionally required, and it is possible to easily produce large rocks and artificial rocks of any shape and taste. Can be significantly shortened, and artificial rock can be manufactured at low cost.

Further, by using a release paper or a synthetic resin film in which the surface of a paper material is coated with a synthetic resin as the sheet-shaped mold material, it is possible to obtain appropriate strength, crease molding, easiness of peeling and low cost. It is possible to obtain a sheet-shaped material having good performance suitable for a female type.

[Brief description of drawings]

FIG. 1 is a perspective view showing a bag-shaped molding state of a sheet-shaped mold material in a method for manufacturing a reinforced plastic artificial rock according to the present invention.

FIG. 2 is a perspective view showing a female mold formed of the sheet-shaped mold material.

FIG. 3 is an enlarged cross-sectional view showing a state in which a resin putty is applied to the female mold.

FIG. 4 is a cross-sectional view showing a state in which FRP is laminated on the female mold.

FIG. 5 is a perspective view showing an artificial rock manufactured in the procedure of the manufacturing method.

6A and 6B show a conventional manufacturing method, wherein FIG. 6A is a sectional view showing a female mold formation state, and FIG. 6B is a sectional view showing an FRP laminated state.

[Explanation of symbols]

 1 sheet-shaped material 1a folds 1b opening 2 stand 3 resin putty 4 FRP

Claims (2)

[Claims] 1. A sheet-shaped mold material is formed into a bag shape, and after this sheet-shaped mold material is irregularly folded to form a large number of pleats,
Return to the original bag shape to make a female mold, apply resin putty to the inner surface of this female mold and bury the folds to form a smooth inner surface,
Furthermore, a method for producing a reinforced plastic artificial rock, characterized in that a fiber reinforced resin is laminated on the inner surface of the resin putty, and after drying, the sheet-shaped mold material is peeled off to remove the female mold. 2. The method for producing a reinforced plastic artificial rock according to claim 1, wherein the sheet-shaped mold member is a release paper or a synthetic resin film, which is a paper member coated with a synthetic resin.