JPH03230917A - Slush molding process of composite colored product - Google Patents

Abstract

PURPOSE:To enable a composite colored product to be molded in the state where other part enters a main body, while the product may be molded by one heating with one die by a method in which after padding has been achieved with viscous plastic sol at a prescribed position, the fluid plastic sol as the material of the main body is poured in the die, and the viscous plastic sol and the fluid plastic sol are heated simultaneously, thereby gelling them. CONSTITUTION:In the molding recessed part 4 of a die 3, padding is achieved so that small recessed parts 5 rise, while said parts are filled with viscous plastic sol. Then fluid plastic sol 6 is poured in the molding recessed parts 4. Next, the die 3 is put in a heating furnace and is heated only from its lower side. When the viscous plastic sol 7 is gelled, ungelled fluid plastic sol 6 is caused to flow out by tipping the die 3. A cavity is generated in the position where the fluid plastic sol 6 has flowed out, and since ungelled fluid plastic sol remains on its inner surface, the die 3 is again put in the heating furnace and gellation is completed by heating the mold from upper and lower sides in this time. Thus, the composite colored product is produced by one slush molding with one die.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a slush molding method for composite color products having partially different colors.

``Prior art'' The slush molding method involves filling a mold with plastic sol, placing it in a heating furnace, heating it, and gelling only the part of the plastic sol that has touched the mold. In this method, the ungelled plastic sol is collected by tilting the mold, heated again to complete gelation, and then the mold is cooled and the product is removed from the mold to obtain the product.

Therefore, according to this slush molding method, it is possible to produce only one color in the molding process, and in the case of dolls, etc., by coloring the surface of the molded product with paint,
Other colors such as hair and eyes were expressed.

However, display samples of foods such as confectionery need to resemble the real thing, so it is impossible to create a texture similar to the real thing by coloring. Plastic sol is used as the material.

However, due to the fluidity of plastic sol, it is difficult to mold multiple materials at the same time.
In the confectionery/childcare display sample where the filling protrudes diagonally from the main body, the molding part of the filling is slanted, so the molding material for the main body and the filling are both placed in the mold. Since filling is impossible, special molding methods such as the following built-in method and mold tilt method are used.

In the case of the built-in method, slush molding is performed by first molding a uniquely colored part of the filling in a first mold, and then incorporating this molded portion of the filling into a second mold.

In addition, in the mold tilting method, the mold has a molding recess that can mold the entire molded product, and small recesses are formed diagonally to the side to mold the parts where the filling protrudes into the molding recess. When molding the filling part, in order to prevent the material from flowing out of the small recesses, the mold is tilted while filling the small recesses with the material horizontally, and the material in the small recesses is gelled by heating. After that, the next step was to return the mold to horizontal position in order to fill it with the main body material.

As for the material, a plastic sol is used, which is a blend of thermosetting resin powder of vinyl chloride, mainly containing a plasticizer, a heat stabilizer, and a pigment. Conventionally, dyes were used for the pigment. .

``Problems to be Solved by the Invention'' According to the conventional slush molding method for composite color products as described above, each method requires at least two heating moldings, which is too time-consuming and energy-saving. The drawback was that it was not suitable for both.

In addition, in the case of the built-in method, it takes more time to assemble the filling part, and in the case of the mold tilting method, the part of the filling which is a different color is attached to the surface of the main body. In particular, when the main body is transparent, such as in the case of a bean paste, there is a problem in that it is not possible to express the filling of the filling inside the main body.

Furthermore, dyes were used for coloring, but because only a limited number of colors could be used, it was difficult to create a sense of realness, especially in the case of display samples.

In view of the above-mentioned circumstances, this invention allows plastic sol materials of different colors to be combined in a mold, so that a composite color product can be molded in one mold with one heating. To provide a slush molding method for a composite color product that can be molded in a state in which other parts dig into the main body, so that the part can be expressed as protruding from the main body.

In addition, the present invention aims to provide a composite color slush molding method that can easily produce a wide variety of colors.

"Means for Solving the Problem" In order to achieve the above object, the inventors conducted various experiments and research, and found that by adding viscosity to the plastic sol, it could be applied to the inner surface of the mold. He discovered that it could be used in a variety of ways, and completed this invention.

In other words, this invention uses a viscous plastic sol mixed with a thickener in the different color part to mold a composite color product in which a different color part is exposed on the main body of the product, and the mold has a viscous plastic sol mixed with a thickener. The gist is to build up the viscous plastic sol, then inject the fluid plastic sol as the main body material, and heat the viscous plastic sol and fluid plastic sol simultaneously to gel them.

In addition, oil paint is used as the pigment mixed into the plastic sol to make it easier to produce a wide variety of colors.

"Function" According to the above structure, when a viscous plastic sol of a different color is built up in a predetermined part of a mold, it does not flow due to its viscosity, so the shape of the buildup is maintained, and then ,
Even when the fluid plastic sol of the main body is injected, the build-up part of the mold does not shift, so the main part and the different color part can be heated and gelatinized at the same time, and in one mold - Composite color products can be produced by slush molding.

The shape of the build-up area of the viscous plastic sol in the mold may be convex or concave with respect to the surface of the molding area of the main body, or may be a uniform surface with no irregularities.

In any case, since the product will have a different color part that bites into the main body, it is possible to realistically represent the different color part being exposed from inside the main body. Therefore, for example, in the case of a display sample of food, even if the unusual color part is formed only on the surface of the main body, it is possible to make it look like the real thing by partially exposing the filling inside. However, if it is a doll's eyes, it can give a realistic feel as if the eyes are exposed.

Examples of thickeners that can be mixed into the plastic sol that forms the different colored parts include the trademark names "Econ" (manufactured by Eshi Chemical Co., Ltd., sold by Hiki Zeon Co., Ltd.) and Nip Seal (manufactured by Otsuka Chemical Co., Ltd.). I can do it.

The amount of thickener required to impart viscosity to the plastic sol varies depending on the shape and size of the different-colored part and its position relative to the main body, and the appropriate amount that prevents flow is determined each time. This is not a particular problem in the invention.

Regarding how to build up the viscous plastic sol, if it is filled into a tube or cylinder, it is easy to build up the required amount in the required area by squeezing.

Also, use a trowel or the like if necessary.

Furthermore, when oil paint is used as the pigment mixed in the plastic sol, there are many types of colors, so it is easy to create the texture, especially in the case of food samples.

In other words, with ordinary dyes, there are over 30 types of colors, making it extremely difficult to make a sample look similar to the real thing, whereas with oil paints, there are around 230 types of colors. It can be used to produce the same color as the real thing.

Next, embodiments of the present invention will be described based on the drawings.

"Example 1" Figures 1 to 5 show an example of slush molding a confectionery display sample S in which a dark brown red bean filling is exposed on a blue kusamochi. The main body 1 shown is formed in an elliptical shape that is long from front to back, and the upper surface of the front half slopes forward, and a uniquely colored part 2 of the filling is exposed on the sloped surface.

In the mold 3, a large number of molding recesses 4, 4 are formed in the flat plate, and each molding recess 4 has a small recess 5 for molding the unique color part 2 diagonally so that the entire display sample S can be molded. It is formed.

Next, the manufacturing process of the above display sample S will be explained.

For the material of main body 1, make ordinary fluid plastic, Kuzuru,
A viscous plastic sol is made as the material for the unique color part 2. Regarding the formulation of fluid plastic sol and viscous plastic sol, DOP plasticizer, heat stabilizer, and oil paint according to each color are added and blended to vinyl chloride resin. In the case of a sol, a thickener is added at the same time and blended.

In the molding recess 4 of the mold 3, the small recess 5 is filled with the viscous plastic sol 7, as shown in FIG. Thereafter, as shown in FIG. 4, a fluid plastic tendon 6 is injected into the molding recess 4.

Next, the mold 3 is placed in a heating furnace and heated only from below. In this case, since the part that touches the mold 3 gels first, the ungelled fluid plastic sol 6 is poured out by tilting the mold 3 when the viscous plastic silure gels.

A cavity 8 is formed where the fluid plastic sol 6 has flowed out, and since the ungelled fluid plastic sol remains on the inner surface of the cavity 8, the mold 3 is placed in the heating furnace again and heated from above and below. This completes gelation.

After the mold 3 is taken out of the heating furnace, it is cooled, the product is taken out, and the finished product as shown in FIGS. 1 and 2 is obtained by removing the firmness.

14.15 shows the area where the firmness was removed.

``Example 2'' Figures 6 to 8 show an example in which the display sample S is a composite color product or a chestnut confectionery. A part of the body 1 is cut out, and a yellow colored part 2 representing a chestnut is exposed in the cutout part 10.

Mold 3 for slush molding the above display sample S,
A concavely curved protrusion 12 is formed on the inner surface of the molding recess 4. Viscous plastic silure, which is the material of the unique color part 2, is built up on the protrusion 12, and then a fluid plastic sol 6 is applied to the molding recess 4. Injected.

Next, the mold 3 is placed in a heating furnace to perform slush molding, and the process is the same as in the previous embodiment.

Although not shown, it is also possible to form a different color part in the different color part 2.

"Effects of the Invention" As explained above, according to the present invention, when molding a composite color product in which different colored parts of different colors are exposed on the main body of the product, a viscous plastic sol mixed with a thickener is applied to the different colored parts. Since the viscous plastic sol is applied to predetermined areas of the mold, it is possible to manufacture composite color products using slush molding in one mold, unlike the conventional built-in method or mold tilt method. , it is easy to work because it does not require duplicate work, is economical because it saves energy with a small number of molds, and not only can the shape of a unique part be made complex with one mold, but also the inside of the main body. It has an excellent effect of being exposed from the inside and making it look real.

Furthermore, when oil paint is used as the pigment mixed in the plastic sol, a large number of colors can be selected, which has the effect of producing a complex color product with a very nice texture.

[Brief explanation of drawings]

Figures 1 to 5 show an example, in which Figure 1 is a perspective view showing a composite color product as a confectionery display sample, Figure 2 is a cross-sectional view thereof, and Figure 3 is a mold in which a viscous plastic sol is used. The fourth is a cross-sectional view showing the state in which the fluid plastic sol is injected, and FIG. 5 is a cross-sectional view showing the state in which the ungelled portion of the fluid plastic sol is poured out. 6 to 8 show other embodiments, FIG. 6 is a perspective view showing a composite color product as a confectionery display sample, FIG. 7 is a sectional view thereof, and FIG. 8 is a viscous FIG. 3 is a cross-sectional view showing a state in which plastic sol is built up. Display samples as composite color products Main body of composite color products Different color parts Mold Fluid plastic sol Viscous plastic sol

Claims (1)

[Scope of Claims] 1) For molding a composite color product in which different colored parts of different colors are exposed on the main body of the product, a viscous plastic sol mixed with a thickener is used in the different colored parts, and the mold has a predetermined position. Slush is a composite color product characterized by filling up the viscous plastic sol, then injecting the fluid plastic sol as the main body material, and heating the viscous plastic sol and fluid plastic sol simultaneously to gel them. Molding method. 2) The slush molding method for a composite color product according to claim 1, wherein oil paint is used as the pigment mixed in the plastic sol.