JPH03155925A - Preparation of resin molded product and mold used therein - Google Patents

Abstract

PURPOSE:To obtain a three-dimensional vinyl chloride resin molded product by demolding each vinyl chloride resin having a flat rear from a mold and subsequently bonding the cured vinyl chloride resins having mutually symmetric outer shapes by an adhesive or a pressure-sensitive adhesive so as to match the flat rears thereof each other. CONSTITUTION:A mold 1 having at least a pair of recessed parts 2, 2a composed of a shape of a character, a figure, a mark or a pattern having mutually symmetric outer shapes is filled with a sol like vinyl chloride resin and placed on a heating plate such as a hot plate or an oven toaster to be heated to cure the sol like vinyl chloride resin. After cooling, the cured vinyl chloride resin is demolded from the mold and a pair of the obtained cured vinyl chloride resin molded products 4, 4a are bonded by an adhesive 6 or a pressure-sensitive adhesive so as to match the flat rears 5, 5a thereof each other. By this method, a three dimensional vinyl chloride resin molded product can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing resin molded articles, particularly vinyl chloride resin molded articles, and a mold used therein.

[Prior Art] Conventionally, a wide variety of plastic acid molded products, whether soft or hard, are commercially available. For example, various products such as toys, dolls, artificial flowers, and shaped fruits are known, but these plastic acid molded products are made by punching out a plastic sheet into a desired shape, or by cutting a mold into a desired shape. Using injection molding method, compression molding method,
Heat or pressure is applied to plastic materials using extrusion molding methods, etc.
Alternatively, it has been manufactured by a method in which both are applied simultaneously.

[Problem to be solved by the invention] However, since molded products manufactured using conventional plastic materials as described above are produced by mechanical molding methods as described above, they are not suitable for mass production or are difficult to manufacture. had the disadvantage of requiring expensive equipment.

On the other hand, the present applicant has already filed Japanese Patent Application No. 1-71700 to easily manufacture vinyl chloride resin molded products having various shapes according to the required quantity using a simple mold. I proposed a method that could be used. However, since the vinyl chloride resin molded product obtained by this method is a flat molded product with a flat back surface, there has been a demand for a product that has a nine-body feel.

The present invention was made in view of the conventional plastic molded products as described in 1-1 above, and uses a simple mold to produce three-dimensional vinyl chloride resin molded products having various desired shapes and colors. The object of the present invention is to provide a method that allows easy production of the required amount, and a mold for use in the method.

[Means for Solving the Problems] That is, the present invention provides a method for applying a sol-form vinyl chloride resin to a mold having a concave portion in the shape of at least two characters, symbols, or patterns having mutually symmetrical outer shapes. After heating and curing the sol vinyl chloride resin, the cured vinyl chloride resin with a flat back surface is removed from the mold, and then the cured vinyl chloride resin with a symmetrical outer shape is removed from the mold. This is a method for producing a resin molded product, which is characterized in that a three-dimensional vinyl chloride resin molded product is obtained by bonding vinyl resins together with their flat back surfaces using an adhesive or pressure-sensitive adhesive.

Further, the present invention provides a molding die characterized in that a metal plate is stamped and pressed to form a recessed portion in the shape of at least one pair of characters, symbols, or patterns having mutually symmetrical outer shapes. This is related to.

The present invention will be explained in detail below.

In the present invention, a sol (liquid) vinyl chloride resin is filled into a mold having a concave portion in the shape of at least four desired character figures, symbols, or patterns having mutually symmetrical outer shapes or outlines. A three-dimensional ink process that involves heating, curing, and molding, and a process of bonding mutually symmetrical pieces of cured vinyl chloride resin together by applying an adhesive or pressure-sensitive adhesive to the flat back side. This is a method for manufacturing a vinyl chloride resin molded product.

FIG. 1 shows an example of a mold used in the method for manufacturing a resin molded product of the present invention, and FIG. 1(a) is a plan view of the mold,
Figure 1(b) shows AA! 1(a) shows an end view, and FIG. 1(c) shows a left side view. In FIG. 1, the mold 1 of the present invention is formed by stamping a thin metal plate to form a pair of recesses 2, 2a on a flat surface representing a face shape having a symmetrical outer shape (outline). However, leg portions 3 are formed on both side surfaces.

The recesses 2, 2a formed in the mold 1 of the present invention may have a desired shape such as a character, a symbol, or a pattern. Further, the metal plate may be made of various metals without particular limitation, and aluminum is particularly preferred.

Next, a method for manufacturing a vinyl chloride resin molded article of the present invention will be explained based on FIGS. 1 to 3.

First, the recesses 2 each have the shape of at least one character 2 figure, symbol, or pattern having mutually symmetrical outer shapes as described above.
, 2a is filled with a sol (liquid) vinyl chloride resin. The sol-form vinyl chloride resin can be filled by extruding the sol-form vinyl chloride resin from an extruded tube and injecting it into a mold, or by setting an extruded tube containing resin and filling it with a large number of molds. It may be poured into the mold all at once.

Sol-form vinyl chloride resin comes in red, blue, green, and brown.

Those in primary colors such as white and black, those colored in various translucent colors such as pink, blue, yellow, and green, or transparent ones can be used.

As a translucent colored vinyl chloride resin, for example, 0 parts by weight of colored vinyl chloride resin per 100 parts by weight of transparent vinyl chloride resin.
．． A resin containing 0.05 to 3 parts by weight, preferably 0.1 to 1 part by weight is desirable. In addition, when such translucent colored vinyl chloride resin is applied and adhered to a white vinyl chloride resin that has been filled in a mold and cured, a vinyl chloride resin molded product with an enamel-like color can be obtained. be able to.

Further, the color of the colored vinyl chloride resin material in sol form is not particularly limited to those mentioned above, and any color can be selected and used. Furthermore, the color is not limited to a single color, and two or more colored vinyl chloride resin materials in sol form may be used in combination. The sol-like colored vinyl chloride L/@ fat is preferably contained in an extruded tube.

Moreover, various stabilizers, additives, etc. can be added to the sol-form vinyl chloride resin depending on the purpose of use of the vinyl chloride resin molded product to be produced.

Furthermore, when filling the mold with sol-form vinyl chloride resin, it is difficult to embed a metal ring, clip, etc. in the upper end.

Next, the mold filled with the above-mentioned sol-form vinyl chloride resin is placed on a heating plate such as a hot plate, or a toaster oven, etc. and heated to harden (gelify) the sol-form vinyl chloride resin. urge

The heating temperature and heating time vary depending on the size, shape, etc. of the vinyl chloride resin molded product, but usually about 150 to 200
C. 25 to 10 minutes is preferred.

In this heating step, since the mold is a metal plate, it has good thermal conductivity and can cure the sol vinyl chloride resin with high thermal efficiency.

In addition, when using two or more sol-form colored vinyl chloride resin materials together, first fill the first color sol-form vinyl chloride resin into the recesses of the mold, and then heat it. After at least the surface is hardened to prevent the sol-form vinyl chloride resin from flowing, a second color of sol-form vinyl chloride resin is filled on top of it, heated and hardened, and this process is repeated one after another.Finally, the entire surface is solidified. The sol vinyl chloride resin is cured (gelled) by heating.

Next, after cooling, the cured (gelled) vinyl chloride resin is removed from the mold.

FIG. 2 is a plan view showing an example of a cured (gelled) vinyl chloride resin molded product manufactured by the above method. The obtained cured vinyl chloride resin molded products 4, 4a are colored or transparent molded products having mutually symmetrical external shapes (contours) and a flat back surface.

Next, as shown in FIG. 3, the above-mentioned pair of cured vinyl chloride resin molded products 4 and 4a are bonded together using an adhesive 6 or a pressure-sensitive adhesive, with the flat surfaces of the back surfaces 5 and 58 of each of them aligned. By doing so, a three-dimensional vinyl chloride resin molded article can be obtained. FIG. 3(a) is a plan view of the obtained three-dimensional vinyl chloride resin molded product, and FIG. 3(b) is a sectional view taken along the line BB.

The vinyl chloride resin molded product manufactured by the method of the present invention described above is a pair of mutually symmetrical soft vinyl chloride resin molded products that are formed into a planar shape with a flat back surface and hardened into a gel-like shape. It is a three-dimensional molded product and can be used indoors.

Outdoor decorations, mascots, toys, keychains,
It can be used as brooches, pendants, and other personal accessories.

In addition, in the manufacturing process described in 1- above, when filling the mold with sol-form vinyl chloride resin, a metal ring, clip, etc. is embedded in the upper end to create a colored or transparent three-dimensional shape. PVC resin molded products can be used as pendants.

Next, as another method of the present invention, a resin molding material having a concave portion formed of a character shape, a symbol, or a pattern having two or more types of mutually symmetrical external shapes corresponding to each essential part of a desired finished product is described. Using a mold, two or more types of three-dimensional vinyl chloride resin molded products constituting each main part of the desired finished product are manufactured by the above manufacturing method, and the two or more types of three-dimensional vinyl chloride resin molded products that are obtained are A desired resin molded product can be manufactured by bonding the resin molded product with an adhesive and assembling the main parts together. According to this method, for example, it is possible to make figurines of various animals and plants, assemble plastic models, make other key porters, brooches, pentane l-, etc.

As described in 1-1, in the present invention, by arbitrarily changing the shape of the concave part of the mold, the color of the sol-form vinyl chloride resin filled in the concave part can be arbitrarily changed according to the shape of the concave part. By doing so, it is possible to produce desired products with various shapes and colors.

[Example] Hereinafter, the present invention will be explained in more detail with reference to Examples.

Example 1 Using a mold 1, as shown in Fig. 1, in which a thin (8 mm thick) aluminum plate is stamped to form recesses 2 and 2a representing an animal's face, first, the recesses 2 are The eyeball, #, and mouth portions were divided into colors and filled with sol-form vinyl chloride resin in black, pink, and red, respectively, and heated once to solidify the sol-form vinyl chloride resin. Next, a white sol-form vinyl chloride resin was filled around the eyeball, and the resin was solidified by heating. Finally, all of the recesses 2 and 2a were filled with green sol vinyl chloride resin. In the method of filling a mold, sol vinyl chloride resin of each color was extruded from an extrusion duplex and poured into a mold.

Next, the mold 1 filled with the above-mentioned sol-form vinyl chloride resin was placed on the hot plate 1 heated to about 200° C. and heated for about 15 minutes, and the sol-form vinyl chloride resin was heated. The resin was cured (kelized). After hardening, cool with water,
The mold was removed from the mold to obtain a cured vinyl chloride resin molded product 4°4a as shown in FIG.

Next, the obtained pair of vinyl chloride resin molded products 4.4a
As shown in Fig. 3, by aligning the flat surfaces of the backs 5゜5a of each piece and pasting them together with adhesive 6, a soft three-dimensional vinyl chloride resin molded product representing an animal's face is made. I got it.

Example 2 As shown in FIGS. 4(a) and 4(b), in addition to the recesses 21.21a representing the animal's face shown in FIG. 1 used in Example 1,
Further, using a mold l in which recesses representing the animal's right hand 22, 22a, left hand 25.25a, trunk 1 2 23.23a, and legs 24, 24a were formed, the same method as in Example 1 was used, as shown in FIG. Animal face 31 , 31 a , right hand 3 as shown in
2,32a.

Left hand 35.35a, torso 33, 33a, feet 34, 34a
Cured vinyl chloride resin molded articles were obtained.

Next, a pair of the obtained vinyl chloride resin molded products were combined into a pair of mutually symmetrical products, and the flat back surfaces of each product were brought together and bonded together using an adhesive 6. The resulting animal face, right hand,
By assembling the vinyl chloride resin molded parts of the left hand, torso, and legs as appropriate and gluing them together with adhesive, the 6th
A soft three-dimensional vinyl chloride resin molded product representing the whole animal as shown in Figures (a) and (b) was obtained.

[Effects of the Invention] As explained above, according to the present invention, three-dimensional vinyl chloride resin molded products having various desired shapes and colors can be easily produced according to the required amount using a simple mold. The effect that can be achieved by manufacturing it can be obtained.

In particular, in the present invention, by arbitrarily changing the shape of the recess of the resin molding mold, and by arbitrarily changing the color of the sol-form vinyl chloride resin filled in the recess according to the shape of the recess. It is possible to create products with shapes and colors.

[Brief explanation of the drawing]

Figure 1 shows an example of a mold used in the method for producing a resin molded product of the present invention. Figure 1 (a) is a plan view of the mold, and Figure 1 (b) is an AA Figure 1(c) is a left side view, Figure 2 is a plan view showing a cured vinyl chloride resin molded product manufactured using the mold shown in Figure 1, and Figure 3(a) is a line end view. is a plan view of a three-dimensional vinyl chloride resin molded product manufactured using the mold shown in Figure 1, and Figure 3 (b) is its B.
The sectional view taken along line B, FIG. 4(a) is a plan view, and FIG.
) is a right side view, FIG. 5 is a plan view showing a cured vinyl chloride resin molded product manufactured using the molding die shown in FIG. 4, and FIG. FIG. 634(b) is an elevational view of a three-dimensional vinyl chloride resin molded product manufactured using the method, and is a sectional view taken along the line CC. 1...Molding mold 2゜3...Legs 4.4a 5.5a 11...Black 13...Pink 15...Red 17...Rib 22.22a...Right hand recess 24.24a... Foot recess 31.3]a... Face 33.33a... Torso 35.35a... Left hand... Cured vinyl chloride resin molded product... Back side 6... Adhesive 12...White 14...Green 16...11t 21.21a...Face recess 23.23a...Torso recess 25.25a...Left hand recess 32, 32a... Right hand 34.34a...leg 2a...recess

Claims (3)

[Claims] (1) At least one pair of characters having mutually symmetrical outlines;
A mold with a concave portion in the shape of a figure, symbol, or pattern is filled with sol-form vinyl chloride resin, and after the sol-form vinyl chloride resin is cured by heating, the back surface is flat. The cured vinyl chloride resin is removed from the mold, and then the cured vinyl chloride resins, which have symmetrical external shapes, are bonded together with adhesive or pressure-sensitive adhesive with their flat back sides together to create a three-dimensional vinyl chloride resin molded product. A method for producing a resin molded product, characterized in that: (2) By the manufacturing method according to claim 1, two or more types of three-dimensional vinyl chloride resin molded products constituting each main part of the finished product are manufactured, and the three-dimensional vinyl chloride resin molded products are bonded with an adhesive. A method of manufacturing a resin molded product, which is characterized by assembling the main parts together by gluing them together. (3) A molding die characterized in that a metal plate is stamped to form recesses in the shape of at least one pair of mutually symmetrical characters, figures, symbols, or patterns.