JPH0839999A - Manufacture of paper plastic art by casting hot sand into double structural frame part - Google Patents

Abstract

PURPOSE:To contrive a reduction in drying hours or prevention of collapsing of a shape of a paper plastic art, by a method wherein an outer frame part of a producing master block is formed of a front face mold and rear face mold, which comprise respectively of reinforced plastic, into a double structural frame part and the paper plastic art is produced by casting hot sand within the frame part of a mold. CONSTITUTION:An outer frame part of a producing master block is formed of a front face mold 2 and rear face mold 3, which comprise respectively of reinforced plastic, into a double structural frame part, into which hot sand is cast and paper plastic art is produced. An inner frame part is formed of a front face mold 5 and rear face mold 6, which comprise respectively of silicone resin, into a double structural frame part, into which the hot sand is cast and paper plastic art is produced. Then in the double structural frame parts each, a plurality of sheets of netlike woven fabric 7 are enclosed into the reinforced plastic and silicone resin part. Furthermore, in the double structural frame parts each, moisture absorbing materials of cotton strings 9 are stuck to the insides of silicone resin part to absorb water coming out of paper plastic raw materials. Then the hot stands are exchanged repeatedly in a cavity within the mold to quicken dryness.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to paper plastic crafts such as dolls and jars.

[Prior Art] Conventionally, a paper plastic was kneaded by hand to be solidified, or a paper plastic was directly carved to form a shape. The method using a mother mold was extremely difficult and was not suitable for mass production. Further, since the raw material of paper plastic is a substance obtained by kneading paper, porcelain clay, white powder, adhesive, etc. with water, it is difficult to form the shape because it adheres to the mother mold during shaping and the evaporation of water is slow.

[Problems to be Solved by the Invention] Conventionally, there have been the following drawbacks. Since the raw material is a substance obtained by kneading paper, porcelain clay, starch powder, adhesive, etc. with water, the evaporation of water took a long time and lost its shape when the mother mold was formed.
Further, when the conventional drying method is carried out, there is a possibility that shrinkage may occur, cracks may occur, the color may change, the quality may deteriorate, and the value may be lost.

The inventor of the present invention has wondered how the raw material is a substance kneaded with water so that it can be dried quickly while forming the shape in the mother die.
Therefore, the structure of the mold was doubled, and it was designed to absorb water.

Unlike natural drying, it was considered to accelerate the drying by putting a warm object in the cavity inside the master mold. The problem to be solved by the present invention is to stabilize the quality by rapidly drying the shape faithfully to the original shape.

[Means for Solving the Problems] The inventors finally completed the present invention as a result of repeated experiments and wondering how to solve the above problems. The double structure frame portion according to the present invention has hot sand 10
A method for producing a paper plastic product characterized by injecting is a solution to the problem, and is as follows. The outer frame portion of the mother die is formed of reinforced plastic on both sides of the reinforced plastic front die 2 and the reinforced plastic back die 3 according to the original shape of a doll, a jar, or the like. As a material that can be replaced with a reinforced plastic, any material that is strong, lightweight and easy to work with may be used.

The inner frame portion is formed inside the reinforced plastic in a slightly smaller size and has the same shape as that of the reinforced plastic. A flexible material is required because the raw material moldings such as dolls and jars are placed inside the silicone resin.

The reinforced plastic and the silicone resin are formed by enclosing a plurality of mesh-like woven cloths 7 in each.
As the woven cloth, one woven into a mesh using chemical fibers or natural fibers may be used.

A cotton string 9 having a thickness of 2 to 3 mm is attached to the inner surface of the silicone resin in order to absorb the water generated from the paper plastic raw material 8. On the inner surface of the silicone resin, which is the inner side of the mother die, from above the cotton string 9 for absorbing moisture, depending on the size of the creation, depending on the size of the creation, it is a plate-shaped paper plastic raw material 8 with a thickness of about 5 mm to 8 mm.
Are placed side by side, and evenly pressed so that the mother die and the paper plastic raw material 8 are sufficiently brought into close contact with each other.

In order to accelerate the drying, the hot sand 10 is repeatedly replaced in the cavity inside the mother die to evaporate the water content of the raw material and stop the drying.

[Operation] A method for producing a paper plastic product characterized by pouring hot sand 10 into the double-structured frame portion according to the present invention is used and formed as follows. The purpose of using reinforced plastic is to be lightweight, strong and easy to work with. By enclosing a plurality of mesh-like woven fabrics 7 to further reinforce the reinforced plastic, the reinforced plastic is further strengthened and serves to prevent cracks. Similarly, a thin silicone resin does not break in the middle and has a function of giving more flexibility, and the work can be easily performed when the molded product is taken out.

In the case of conventional natural drying of a paper-plastic molded product, since the material contains a large amount of water, it has been devised to reduce shrinkage compared to drying for a long time. The heated sand is poured into the cavity to suppress the contraction, and the hot sand 10 discharges the water. Furthermore, the cotton string 9 also serves to absorb water. In addition, the heated coarse sand is poured, the cooled rough sand is taken out, and the heated coarse sand is repeatedly poured again to perform natural drying in a short time.

Since the outer frame portion is made of reinforced plastic on both sides of the reinforced plastic front mold 2 and the reinforced plastic back mold 3, the rigidity of the base is maintained. Since the inner frame is also made of silicon resin on both sides of the silicon resin front surface mold 5 and the silicon resin back surface mold 6, there is softness of the resin and softness due to the moisture absorbing cotton string 9, and the plate-shaped paper plastic raw material 8 are arranged side by side so that even pressure can be applied uniformly and the mother die and the paper plastic raw material 8 can evenly adhere.

[Embodiment] An embodiment of the present invention will be described below. (A) The outer frame portion of the mother die for production is made of reinforced plastic on two sides, the reinforced plastic front die 2 and the reinforced plastic back die 3. (B) The inner frame portion is formed inside the reinforced plastic in a slightly smaller size and has the same shape as that of the reinforced plastic, and is made of silicon resin on two surfaces of the silicon resin front mold 5 and the silicon resin back mold 6. (C) A plurality of mesh-like woven fabrics 7 are enclosed in reinforced plastic and silicon resin, respectively. (D) The moisture absorbent material of the cotton string 9 is attached to the inner surface of the silicone resin in order to absorb the moisture generated from the paper plastic raw material 8. (E) Hot sand 10 to accelerate drying in the cavity inside the mother mold
A method for producing paper plastic crafts, characterized by pouring hot sand into a double-structured frame that is repeatedly replaced.

A silicon resin is placed inside the reinforced plastic, and a cotton string 9 for absorbing water and a cloth tape are placed side by side in a mesh / vertical shape on the inner surface of the silicon resin, and the places are fixed with a silicone adhesive. .

When the mother die is formed, the paper plastic raw material 8 is formed in a plate shape with a thickness of about 5 mm to 8 mm from above the cotton string 9 for absorbing water, which is the inside of the mother die, depending on the size of the creation. They are arranged side by side and uniformly pressed so that the mother die and the paper plastic raw material 8 are sufficiently brought into close contact with each other.

Next, as shown in FIG. 1, the mother die is assembled such that the front die and the back die of the reinforced plastic and the silicone resin are faced to each other, and the port 11 and the nut 12 are passed through several fixing holes in the edge 1. Combine by combining. Put superheated rough sand into the central cavity from the top opening to facilitate drying. The bottom 4 also needs to be constructed so that sand does not leak.

[Advantages of the Invention] The drying time is shortened by the method for producing a paper plastic product characterized by pouring hot sand 10 into the double-structured frame portion according to the present invention. When the object to be created is taken out from the mold, it can be taken out easily without sticking to the mother mold and losing its shape. It is possible to perform mass production with this method, which is conventionally difficult to fabricate using a mother die.

[Brief description of drawings]

FIG. 1 is an assembly diagram showing an embodiment of the invention.

FIG. 2 is a perspective view showing an embodiment of the invention.

FIG. 3 is an enlarged view of a half section taken along line AA ′ of FIG. 2 of the present invention.

[Explanation of symbols]

 1 Edge 2 Reinforced Plastic Front Mold 3 Reinforced Plastic Back Mold 4 Bottom 5 Silicone Resin Front Mold 6 Silicone Resin Back Mold 7 Netted Woven Fabric 8 Paper Plastic Raw Material 9 Cotton String 10 Hot Sand 11 Bolts 12 Nuts

Claims (5)

[Claims] 1. The outer frame portion of the mother die for manufacturing has a double structure frame portion formed of reinforced plastic on two sides, a reinforced plastic front die (2) and a reinforced plastic back die (3), and is provided with hot sand. A method of manufacturing paper plastic crafts that features injection. 2. The inner frame part is made of silicon resin on the inner side of the reinforced plastic and has a slightly same shape as that of the reinforced plastic on two sides of a silicon resin front mold (5) and a silicon resin back mold (6). The method for producing a paper plastic craft, wherein hot sand is injected into the double-structured frame portion according to claim 1. 3. Hot sand is poured into the double-structured frame part according to claim 1 or 2, wherein a plurality of mesh-like woven fabrics (7) are enclosed in reinforced plastic and silicon resin, respectively. A method of making paper plastic crafts featuring things such as things. 4. The double layer according to claim 1, 2 or 3, wherein a moisture absorbent material of a cotton string (9) is attached to the inner surface of the silicone resin to absorb the moisture generated from the paper plastic raw material (8). A method for making paper plastic crafts, which is characterized by pouring hot sand into the structural frame. 5. A method for producing a paper plastic craft, characterized in that hot sand (10) is repeatedly replaced in the cavity inside the mother die to accelerate drying, and hot sand is injected into the double-structured frame portion.