JPH05147074A - Multi-color molded piece and production thereof - Google Patents

Abstract

PURPOSE:To enhance a natural feeling of patterns by a method wherein a transfer foil provided with a translucent printing layer is placed in a mold correspondingly to the top surface of a molded piece, and a plurality of resin materials of different colors are injected into the mold in a mixed state and, thereby, the printing layer of the transfer foil is transferred to the top surface of the molded piece. CONSTITUTION:A plurality of resin materials of different colors are injected into a mold in a mixed state to be molded into a molded piece 1. A marble 1a formed in the molded piece 1 has various patterns depending on, e.g. the condition of mixing the resin materials of different colors. In the mold, a transfer foil provided with a translucent printing layer 2 is placed on a part corresponding to the top surface of the molded piece. A marble 2a of a fixed pattern is formed in the printing layer 2. By releasing the foil from the molded piece, the marble 2a is integrally overlapped on the marble 1a of the molded piece 1. Therefore, a difference in a depth direction made between the marbles 1a and 2a produces a natural feeling of the marbles 1a and 2a.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art It is preferable that a container such as a compact container for storing cosmetics has a good appearance. Therefore, a container lid, a top plate, or the like may be formed by a molded product 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. As a method of producing a molded product having a marble pattern formed thereon, a method of printing a marble pattern on the surface of the molded product other than the above method, a method of transferring a printing layer having a marble pattern printed during molding in a mold, etc. There is a method. Particularly, the technology for carrying out the third method has been developed by the applicant of the present invention and the patent right (Patent No. 1379007, Japanese Patent Publication No. 60-11607) has already been acquired.

[0003]

However, there is no problem at all when a molded product having a marble pattern is produced by using each of the above methods. That is, when the first method is adopted, the molded marble pattern is not stable due to variations in molding conditions such as resin temperature during molding, injection speed, molding die temperature, etc. Hard to get. When the second and third methods are adopted,
Since these methods are basically printing, the obtained marble pattern becomes flat and it is difficult to express the depth (depth, stereoscopic effect).

An object of the present invention is to provide a multicolor molded product having a stable pattern and capable of expressing a three-dimensional effect, and a manufacturing method thereof.

[0005]

In order to solve the above-mentioned problems, a multicolor molded product according to the present invention is a semi-transparent product in which a predetermined pattern is printed on the surface of a molded product obtained by mixing and injecting a plurality of different color resin materials. The printed layer is formed integrally.

Further, in the method for producing a multicolor molded product, a transfer foil having a translucent printing layer on which a predetermined pattern is printed is arranged on the surface side of the molded product in the molding die, and the molding die is closed. After that, a plurality of different color resin materials are mixed and injected into the molding die, then the molding die is opened and the transfer foil is peeled off from the molding product, and the translucent printing layer is transferred to the surface of the molding product. It is characterized by doing.

[0007]

According to the multicolor molded product, it is possible to have a stable pattern and to express a three-dimensional effect. That is,
Since a semi-transparent printed layer with a predetermined pattern is integrally formed on the surface of a molded product that is made by mixing and injecting multiple different color resin materials, the mixed state of the different color resin materials injected due to variations in molding conditions Even if the pattern changes due to, the basic pattern can be defined by the pattern printed on the print layer. Therefore, a stable pattern can be formed. Further, the pattern due to the mixed state of the different color resin material is visually reflected through the translucent print layer, and a difference in the depth direction occurs between the pattern printed on the print layer and the pattern made of the different color resin material. .. Therefore, the stereoscopic effect of the pattern can be expressed.

According to the method for producing a multicolor molded article, it is possible to produce a multicolor molded article having a stable pattern and capable of expressing a three-dimensional effect. That is, a transfer foil having a translucent printing layer is arranged on the surface side of a molded product of a molding die, and a plurality of different color resin materials are mixed and injected into the molding die to transfer the injected different color material. The print layers of the foil can be integrated. Therefore, when the molding die is opened and the transfer foil is peeled off from the molded product, the translucent printing layer is transferred to the surface of the molded product, whereby a multicolor molded product can be manufactured.

[0009]

EXAMPLES The above-mentioned multicolor molded article and its manufacturing method will be described below with reference to the drawings. 1A and 1B are explanatory views of a multicolor molded product according to the first embodiment. FIG. 1A is a perspective view, FIG. 1B is a sectional view, and FIG. 2 is a perspective view of a multicolor molded product according to another embodiment. 3 is a diagram illustrating a method for producing a multicolor molded product, FIG. 4 is a diagram illustrating another method for producing, and FIG. 5 is a cross-sectional view of a transfer foil.

The multicolor molded product A shown in FIG. 1 is a molded product 1 in which two different color resin materials are mixed and injected, and a printing layer 2 is formed on the entire surface thereof. The molded body 1 is molded by mixing and injecting a plurality of different color resin materials such as a transparent resin material and a white resin material, or a white resin material and a red resin material. As described above, the marble pattern 1a is formed on the molded body 1 by mixing a plurality of different color resin materials and performing injection molding. In injection molding of the molded body 1, the mixing conditions of a plurality of different color resin materials and the molding conditions for each molded body 1 often vary slightly. Therefore, the marble pattern 1a in each molded body 1 does not always have a constant pattern, and often has different patterns.

The printing layer 2 is formed on the entire surface of the molded body 1. The printed layer 2 is adhered to the surface of the molded body 1 via the adhesive layer 3 by the method described later. The print layer 2 is formed as a layer in which a marble pattern is printed using semitransparent ink. Therefore, the marble pattern 2a printed on the print layer 2 is formed with a certain pattern.

In the multicolor molded product A in which the printed layer 2 is formed on the entire surface of the molded product 1, the marble pattern 1a formed on the molded product 1 and the marble pattern 2a printed on the printed layer 2 are superposed. A marbled pattern is formed. Therefore, since the basic pattern of the marble pattern in the multicolor molded product A is defined by the marble pattern 2a of the printing layer 2, even if the pattern of the marble pattern 1a in the molded body 1 changes, A stable pattern can be obtained as the marble pattern. Further, since the marble pattern 1a of the molded body 1 is visible through the translucent print layer 2, a depth difference is generated between the marble pattern 1a of the print layer 2 and the marble pattern 2a. For this reason, the marble pattern in the multicolor molded product A has a three-dimensional effect, and the appearance can be improved.
Furthermore, since the patterns of the marble patterns 1a in the individual molded bodies 1 are slightly different, even if the marble patterns in the multicolor molded product A have the same basic pattern, the individual multicolor molded products A Then there are subtle changes. For this reason, the uniform appearance of the multicolor molded product A is reduced, and the individual feeling can be improved.

The multicolor molded product B shown in FIG. 2 is a molded product 1 in which two different color resin materials are mixed and injected, and a printing layer 2 is formed on the surface of the edge of the molded product 1. In the multicolor molded product B, it is possible to define a basic pattern by the marble pattern 2a of the printing layer 2 formed on the edge portion, and by this pattern, the overall marble pattern can be stabilized. Is possible. In the multi-color molded product B, the marble pattern in the central portion makes the marble pattern 1a of the molded body 1 visible, but since the pattern of the edge portion is stable, it is possible to further reduce the sense of uniformity and individual feeling. Can be improved.

It is preferable that the surface of each of the multicolor molded products A and B as described above is subjected to a UV coating treatment such as an ultraviolet curable coating material. By applying such a coat treatment,
It is possible to increase the surface hardness of the multicolor molded products A and B and further improve the three-dimensional effect by the transparent coat layer. For this reason, it becomes possible to give the multicolor molded products A and B a more luxurious appearance.

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 structure 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 PE
A print layer 2 is provided on one surface of a base film 5 made of T (polyethylene terephthalate), PP (polypropylene) or the like via a release layer 6, and an adhesive layer 3 is further provided on the surface of the print 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 multicolor 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 the end portion in the width direction.

The screw type molding apparatus shown in FIG. 3 comprises a movable mold 12a having a cavity 11 as the front surface of a multicolor molded product A, B and a fixed mold 12 having a core 13 as the rear surface.
This is a device for arranging a transfer foil 4 in a molding die 12 made of b and injecting a plurality of different color resin materials from different heating cylinders 14a, 14b containing a screw to manufacture multicolor molded products A, B. .. The long transfer foil 4 is mounted on a feeding device 15a provided in the vicinity of the movable die 12a, and an end portion of the transfer foil 4 passes through the inside of the cavity 11 and is wound around a winding device 15b. At this time, the base film 5 of the transfer foil 4 is arranged on the movable mold 12a side, and the adhesive layer 3 (printing layer 2) is arranged on the fixed mold 12b side (core 13 side). The transfer foil 4 is automatically fed with one cycle of molding work. Therefore, a sensor (not shown) is provided on the supply path of the transfer foil 4 and near the movable die 12a.
It is preferable to control the supply pitch of the transfer foil 4 by this sensor.

Transfer foil 4 supplied to cavity 11
Is vacuum-sucked through a hole (not shown) formed in the movable die 12a and comes into close contact with the surface of the movable die 12a. In this state, the molding die 12 is closed and the different color resin material is injected from the heating cylinders 14a and 14b.
It joins and mixes at, nozzle 17, runner 18, sprue 19
Through the gate 20 into the cavity 11. In this process, a plurality of different color resin materials injected from the heating cylinders 14a and 14b are mixed and, when injected into the cavity 11, a marble pattern according to the mixed state of the different color resin materials is formed.

The molded body 1 is molded with a resin material mixed with a plurality of different color resin materials injected into the cavity 11, and at the same time, the adhesive layer 3 of the transfer foil 4 is formed on the surface of the molded body 1.
The printing layer 2 is adhered via the molded body 1 and the transfer foil 4
Are integrated. When the movable die 12a is moved to open the molding die 12 after the molded body 1 has cooled after a predetermined time has passed, the base film 5 of the transfer foil 4 and the printing layer 2 are peeled off as the movable die 12a moves. The layer 6 is peeled off at the boundary, whereby the printed layer 2 is transferred to the molded body 1 to form the printed layer 2 on the surface of the molded body 1. As described above, multi-color molded products A and B can be manufactured by integrally forming the print layer 2 on which the marble pattern is printed on the surface of the molded product 1 molded by mixing and injecting a plurality of different color resin materials. It is possible.

The plunger type molding apparatus shown in FIG. 4 molds the molded body 1 by injecting a resin material in which a plurality of different color resin materials are mixed in advance from the heating cylinder 21 and injecting it into the cavity 11, and at the same time Cavity 11 on the surface of molded body 1
This is a device that integrates the printing layer 2 of the transfer foil 4 arranged in the. When manufacturing the multicolor molded products A and B using the above-mentioned molding apparatus, it is possible to supply a desired type of different color resin material to the heating cylinder 21. That is, the molded body 1
At the time of molding, it is possible to mold the molded body 1 with two or more different color resin materials. Therefore, it becomes possible to form a more complicated marble pattern, and it is possible to manufacture the multicolor molded products A and B having improved aesthetics.

[0020]

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 printing layer. For this reason,
It can stabilize the basic pattern. Further, variation in the pattern of the pattern formed by the mixed state when a plurality of different-color resin materials are mixed and injected can reduce the sense of uniformity with respect to the multicolor molded product and improve the individuality. In addition, since the print layer is configured to be semi-transparent, a difference in the depth direction occurs between the pattern printed on the print layer and the pattern of the molded body, and a stereoscopic effect of the pattern can be obtained by this difference. Therefore, it is possible to improve the sense of quality.

Further, according to the method of manufacturing a multicolor molded product according to the present invention, it is possible to rationally manufacture a multicolor molded product having a stable pattern and capable of expressing a three-dimensional effect. Is to have.

[Brief description of 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 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 of manufacturing a multicolor molded product.

FIG. 4 is a diagram illustrating another manufacturing method.

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

[Explanation of symbols]

A and B are multicolor molded products, 1 is a molded product, 1a and 2a are marble patterns, 2 is a printing layer, 3 is an adhesive layer, 4 is a transfer foil,
5 is a base film, 6 is a release layer, 11 is a cavity, 12
Is a molding die, 12a is a movable die, 12b is a fixed die, 13 is a core,
14a, 14b and 21 are heating cylinders, 15a is a feeding device, 15b is a winding device, 16 is a connecting block, 17 is a nozzle, 18 is a runner,
19 is a sprue and 20 is a gate.

Claims (2)

[Claims] 1. A multicolor molded article, wherein a semitransparent printing layer having a predetermined pattern printed thereon is integrally formed on the surface of a molded body obtained by mixing and injecting a plurality of different color resin materials. 2. A transfer foil having a translucent printing layer on which a predetermined pattern is printed is arranged on the surface side of a molded product in the molding die, the molding die is closed, and then the molding die is closed. Multicolor, characterized by mixing and injecting multiple different color resin materials, then opening the molding die, peeling the transfer foil from the molded product, and transferring the translucent printing layer to the surface of the molded product. Molded article manufacturing method.