JP3126779B2 - Multicolor molded products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multicolor molded article used for a decorative lid or a decorative top plate of a container such as a compact.

[0002]

2. Description of the Related Art It is preferable that a container such as a compact for storing cosmetics has good appearance. For this reason, a container lid, a top plate, or the like may be constituted by a molded article in which a plurality of different-color resin materials are mixed and injected, and a marble pattern is formed by a mixed state of these different-color resin materials.

[0003] In addition to the above-mentioned methods, there are other methods for producing a molded article having a marble pattern formed thereon, such as a method of printing a marble pattern on the surface of the molded article, and a step of transferring a printed layer having the marble pattern printed during molding in a mold. And other methods. In particular, the technology for implementing the third method is developed by the present applicant and has already been patented (Patent No. 1379007, Japanese Patent Publication No.
-11607).

[0004]

However, there is no problem in producing a molded product having a marble pattern by employing the above-mentioned methods. That is, when the first method is adopted, the formed marble pattern is not stable due to the variation of the molding conditions such as the resin temperature, the injection speed, and the molding die temperature at the time of molding. Difficult to obtain. When the second and third methods are adopted,
Since these methods are basically printing, the obtained marble pattern becomes planar, and it is difficult to express depth (depth, three-dimensional appearance).

An object of the present invention is to provide a multicolor molded article having a stable pattern and capable of expressing a three-dimensional effect, and a method for producing the same.

[0006]

Means for Solving the Problems In order to solve the above problems, a multicolor molded article according to the present invention has a predetermined pattern on the back surface of a molded article obtained by mixing and injecting a plurality of translucent different color resin materials. The printed printed layer is integrally formed.

According to the above-mentioned multicolor molded article, it is possible to have a stable pattern and express a three-dimensional effect. That is, since a printing layer on which a predetermined pattern is printed is integrally formed on the back surface of the molded body formed by mixing and injecting a plurality of translucent different-color resin materials, the different-color resin material injected due to a variation in molding conditions. Even if the pattern fluctuates due to the mixed state, the pattern printed on the print layer is visually recognized through the translucent different-color resin material, and the basic pattern can be defined by this pattern.

Therefore, a stable pattern can be formed. In addition, since the pattern formed by the mixed state of the different color resin material and the pattern formed on the print layer are visually recognized in an overlapping manner, the difference in the depth direction between the pattern formed by the different color resin material and the pattern printed on the print layer is reduced. Occurs. Therefore, it is possible to express a three-dimensional effect of the pattern.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The above-described multicolor molded article and a method for producing the same will be described with reference to the drawings. FIG. 1 is an explanatory view of a multicolor molded product according to the first embodiment, (A) is a perspective view, (B) is a sectional view, FIG. 2 is a perspective view of a multicolor molded product according to another embodiment,
FIG. 3 is a diagram illustrating a method for manufacturing a multicolor molded product, FIG. 4 is a diagram illustrating another manufacturing method, and FIG. 5 is a cross-sectional view of a transfer foil.

A multi-color molded article A shown in FIG. 1 is one in which a printed layer 2 is formed on the back surface of a molded article 1 obtained by mixing and injecting two translucent different-color resin materials. The molded body 1 is molded by mixing and injecting a plurality of translucent different-color resin materials such as a transparent resin material and a translucent white resin material, or a translucent white resin material and a translucent red resin material. As described above, by mixing and injection-molding a plurality of translucent different-color resin materials, the molded body 1 is formed into a semi-transparent shape, and a marble pattern 1a corresponding to a mixed state of the plurality of different-color resin materials is formed. I have.

When the molded article 1 is injection-molded, the conditions for mixing a plurality of translucent different-color resin materials and the molding conditions for the individual molded articles 1 often vary slightly. For this reason, the marble pattern 1a in each molded body 1 is not always a fixed pattern, but often has a different pattern.

The printing layer 2 is formed on the back surface of the molded body 1. The printing layer 2 is adhered to the back surface of the molded body 1 via an adhesive layer 3 by a method described later. The printing layer 2 is formed as a layer on which a marble pattern is printed. Therefore,
The marble pattern 2a printed on the print layer 2 is formed with a certain pattern. A vapor deposition layer 7 of aluminum or the like is formed on the back surface of the print layer 2 (the surface opposite to the adhesive layer 3), and the vapor layer 7 reflects light transmitted through the molded body 1 and the print layer 2. It is composed.

In the multicolored molded article A in which the printed layer 2 is formed on the back surface of the molded article 1, the marble pattern 1a formed on the molded article 1 and the marble pattern 2a printed on the printed layer 2 overlap. A marble pattern is formed. Therefore,
Since the basic pattern of the marble pattern in the multicolor molded article A is defined by the marble pattern 2a of the print layer 2, even if the pattern of the marble pattern 1a in the molded body 1 fluctuates, the entire marble pattern As a result, a stable pattern can be obtained.

Further, since the marble pattern 2a of the printing layer 2 is visually recognized through the translucent molded body 1, a difference in depth occurs between the marble pattern 2a and the marble pattern 1a of the molded body 1. For this reason,
The marble pattern in the multicolored molded article A has a three-dimensional effect, and the appearance can be improved. Furthermore, since the pattern of the marble pattern 1a in each molded article 1 is slightly different, even if the basic pattern of the marble pattern in the multicolor molded article A is the same, the individual multicolor molded article A Then a subtle change occurs. For this reason, the uniformity of the multicolor molded article A is reduced, and the individuality can be improved.

A multi-color molded product B shown in FIG. 2 is obtained by forming a printed layer 2 on the back surface of a molded product 1 formed into a lens shape.
In the multicolor molded product B, it is possible to stabilize the entire marble pattern by defining a basic pattern by the marble pattern 2a of the printing layer 2 in the same manner as the multicolor molded product A, and The molded article 1 can exhibit a lens effect and improve the three-dimensional appearance of the marble pattern.

In the multicolor molded articles A and B as described above, it is preferable that the surface is subjected to a UV coating treatment such as an ultraviolet curable paint. By performing such a coating process,
The surface hardness of the multicolor molded products A and B can be increased, and the three-dimensional effect can be further improved by the transparent coat layer. For this reason, it is possible to give the multi-colored molded products A and B a higher quality.

Next, a method for producing the multicolor molded products A and B will be described. The multicolor molded products A and B can be manufactured by the same method. First, the configuration of the transfer foil 4 used when manufacturing the multicolor molded products A and B will be described with reference to FIG.

The transfer foil 4 is provided with a release layer 6 on one surface of a base film 5 made of PET (polyethylene terephthalate), PP (polypropylene) or the like, and a vapor deposition layer 7 of aluminum or the like is formed on the surface of the release layer 6. The printing layer 2 is formed on the vapor deposition layer 7, and the adhesive layer 3 is further provided on the surface of the printing layer 2. The transfer foil 4 is formed in a long shape, and a marble pattern is printed on the printing layer 2 of the transfer foil 4 at a pitch corresponding to the dimensions of the multi-color molded products A and B. The base film 5 of the transfer foil 4 has a dimension larger than the width dimension of the printing layer 2, and a detection mark (not shown) is formed at an end in the width direction.

A screw-type molding apparatus shown in FIG. 3 comprises a movable mold 12a having a core 11 serving as the back surface of the multicolor molded products A and B, and a fixed mold 12 having a cavity 13 serving as the back surface.
A device for placing multi-color molded products A and B by disposing a plurality of translucent different-color resin materials from different heating cylinders 14a and 14b each having a screw therein and disposing the transfer foil 4 in a molding die 12 made of b. It is.

The long transfer foil 4 is mounted on a feeding device 15a provided in the vicinity of the movable die 12a, and its end is wound around a winding device 15b through the inside of the cavity 13. At this time, the base film 5 of the transfer foil 4 is arranged in close contact with the core 11 formed on the movable mold 12a side, and the adhesive layer 3 (print layer 2) is arranged on the cavity 13 side. The transfer foil 4 is automatically fed with one cycle of the molding operation. For this reason, it is preferable to provide a sensor (not shown) on the supply path of the transfer foil 4 and near the movable mold 12a, and to control the supply pitch of the transfer foil 4 by this sensor.

Transfer foil 4 supplied to cavity 13
Is sucked in vacuum through a hole formed in the core 11 of the movable die 12a and comes into close contact with the surface of the core 11. In this state, the mold 12
When the translucent different-color resin material is injected from the heating cylinders 14a and 14b, the injected translucent different-color resin materials are joined and mixed in the connecting block 16, and pass through the nozzle 17, the runner 18 and the sprue 19 to the gate 20. From the cavity 13. In this process, the plurality of translucent different-color resin materials injected from the heating cylinders 14a and 14b are mixed, and when injected into the cavity 13, a marble pattern corresponding to the mixed state of the translucent different-color resin materials is formed.

The molded article 1 is made of a resin material in which a plurality of translucent different color resin materials injected into the cavity 13 are mixed.
Is formed, and at the same time, the printing layer 2 is adhered to the back surface of the molded body 1 via the adhesive layer 3 of the transfer foil 4, and the molded body 1 and the transfer foil 4 are integrated.

After a predetermined time has passed and the molded body 1 has cooled, the movable die 12a is moved to open the molding die 12, and as the movable die 12a moves, the base film 5 of the transfer foil 4 and the vapor deposition layer 7 and the printed layer 2 are separated from each other with the release layer 6 as a boundary, whereby the printed layer 2 is transferred to the molded body 1 to form the printed layer 2 on the back surface of the molded body 1.

As described above, a printed layer 2 on which a marble pattern is printed is integrally formed on the back surface of a molded article 1 formed by mixing and injecting a plurality of translucent different-color resin materials to form a multicolor molded article A,
B can be produced.

In the plunger type molding apparatus shown in FIG. 4, a resin material in which a plurality of translucent different-color resin materials are mixed in advance is injected from the heating cylinder 21 and injected into the cavity 13, thereby forming the molded body 1. At the same time, the core 11
Printing layer 2 and vapor deposition layer 7 of transfer foil 4 arranged thereon
This is a device in which is integrated.

When producing the multi-color molded products A and B by using the above-mentioned molding apparatus, it is possible to supply a desired type of translucent different-color resin material to the heating cylinder 21. That is, when the molded body 1 is molded, the molded body 1 can be molded with two or more kinds of translucent different-color resin materials. Therefore, it is possible to form a more complicated marble pattern, and it is possible to manufacture multicolor molded products A and B with improved aesthetic appearance.

[0027]

As described in detail above, in the multicolor molded article according to the present invention, the pattern to be formed can be defined by the pattern printed on the print layer. For this reason,
Basic patterns can be stabilized. In addition, a variation in the pattern of the pattern formed by the mixed state when a plurality of translucent different color resin materials are mixed and injected can reduce the uniformity of the multicolor molded product and improve the individuality.

Further, since the molded article is molded from a translucent different color resin material, a difference in the depth direction occurs between the pattern printed on the printing layer and the pattern of the molded article, and the three-dimensional effect of the pattern is obtained by the difference. Can be done. For this reason, luxury can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a multicolor molded product according to a first embodiment, (A) is a perspective view, and (B) is a cross-sectional view.

FIG. 2 is a perspective view of a multicolor molded product according to another embodiment.

FIG. 3 is a diagram illustrating a method for manufacturing a multicolor molded article.

FIG. 4 is a diagram illustrating another manufacturing method.

FIG. 5 is a sectional view of a transfer foil.

[Explanation of symbols]

 A, B Multicolor molded product 1 Molded product 1a, 2a Marble pattern 2 Printing layer 3 Adhesive layer 4 Transfer foil 5 Base film 6 Release layer 7 Deposition layer 11 Core 12 Mold 12a Movable mold 12b Fixed mold 13 Cavities 14a, 14b , 21 Heating cylinder 15a Feeder 15b Winder 16 Connecting block 17 Nozzle 18 Runner 19 Sprue 20 Gate

Claims (1)

(57) [Claims] 1. A multicolor molded product, wherein a printed layer on which a predetermined pattern is printed is integrally formed on the back surface of a molded product obtained by mixing and injecting a plurality of translucent different color resin materials.