JPH05147075A - Multi-color molded piece and production thereof - Google Patents

Abstract

PURPOSE:To emphasize a natural feeling by a method wherein a transfer foil provided with a printing layer is placed in a mold correspondingly to the rear surface of a molded piece, which is obtained by injection molding a plurality of resin materials of different colors into the mold in a mixed state, and after the mold is closed and the mixed materials are injected into the mold, the mold is opened and the foil is released and, thereby, the printing layer is transferred to the rear surface of the molded piece. CONSTITUTION:A plurality of translucent resin materials of different colors, such as translucent white resin material and red resin material, are injected into a mold in a mixed state to be molded into a molded piece 1. A marble 1a in accordance with a mixed state is formed in the molded piece 1. In the mold, a transfer foil provided with a printing layer 2 printed with a predetermined pattern is placed on a part corresponding to the rear surface of the molded piece 1 and bonded on the rear surface of the molded case 1 with an adhesive layer 3. A marble 2a is printed on the printing layer 2. The marble pattern of the marble 1a with the marble 2a is formed. In this manner, a stable marble pattern can be obtained. Since the marble 2a is seen through the translucent molded piece 1, a difference in depth between the marbles 1a and 2a makes a natural feeling.

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 problems, a multicolor molded product according to the present invention has a predetermined pattern on the back surface of a molded product obtained by mixing and injecting a plurality of translucent different color resin materials. The printed layer is integrally formed.

Further, in the method for producing a multicolor molded product, a transfer foil having a printing layer on which a predetermined pattern is printed is arranged on the back surface side of the molded product in the molding die, and after closing the molding die, A feature of mixing and injecting a plurality of translucent different color resin materials into a molding die, then opening the molding die, peeling the transfer foil from the molding, and transferring the printing layer to the back surface of the molding It is what

[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 printed layer with a predetermined pattern is integrally formed on the back surface of a molded product that is made by mixing and injecting a plurality of translucent different-color resin materials, the mixed state of the different-color resin materials injected due to variations in molding conditions Even if the pattern is changed, 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. Further, 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 as overlapping, there is a difference in the depth direction between the pattern formed by the different color resin material and the pattern printed on the print layer. Occurs. 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 printing layer is arranged on the back surface side of the molded product of the molding die, and a plurality of semitransparent 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 from the molded product, the printing layer is transferred to the back 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.

A multicolor molded product A shown in FIG. 1 is a molded product 1 formed by mixing and injecting two color translucent different color resin materials and forming a printing layer 2 on the back surface thereof. The molded body 1 is molded by mixing and injecting a plurality of semitransparent different color resin materials such as a transparent resin material and a semitransparent white resin material, or a semitransparent white resin material and a semitransparent red resin material. As described above, the plurality of semitransparent different-color resin materials are mixed and injection-molded, whereby the molded body 1 is semitransparently formed, and the marble pattern 1a corresponding to the mixed state of the plurality of different-color resin materials is formed. There is. When injection molding the molded body 1, the mixing conditions of a plurality of semitransparent 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 back surface of the molded body 1. The printed layer 2 is adhered to the back surface of the molded body 1 via the adhesive layer 3 by the 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 made of aluminum or the like is formed on the back surface (the surface opposite to the adhesive layer 3) of the printing layer 2 so that the vapor deposition layer 7 can reflect the light transmitted through the molded body 1 and the printing layer 2. Is configured.

In the multicolored molded product A in which the printing layer 2 is formed on the back 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 marble 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, the entire marble pattern As a result, it is possible to obtain a stable pattern. Further, since the marble pattern 2a of the printed layer 2 is visually recognized through the translucent molded body 1,
A difference in depth occurs between the molded body 1 and the marble pattern 1a. For this reason, the marble pattern in the multicolor molded product A has a three-dimensional effect, and the appearance can be improved. Further, 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 lens-shaped molded product 1 on which a printing layer 2 is formed on the back surface.
In the multicolor molded product B, as in the multicolor molded product A, it is possible to define the basic pattern by the marble pattern 2a of the printing layer 2 and to stabilize the entire marble pattern. The molded body 1 can exert a lens effect to improve the three-dimensional effect of the marble pattern.

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 release layer 6 is provided on one surface of a base film 5 made of T (polyethylene terephthalate), PP (polypropylene) or the like, a vapor deposition layer 7 of aluminum or the like is formed on the surface of the release layer 6, and the vapor deposition layer 7 is printed. The layer 2 is formed, 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 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 includes a movable mold 12a having a core 11 which is the back surface of the multicolor molded products A and B, and a fixed mold 12 having a cavity 13 which is the back surface.
An apparatus for arranging a transfer foil 4 in a molding die 12 made of b, and injecting a plurality of semitransparent different-color resin materials from different heating cylinders 14a, 14b containing a screw to manufacture multicolor molded products A, B. Is. Long transfer foil 4 is movable
It is attached to a feeding device 15a provided in the vicinity of 12a, and its end portion is passed through the inside of the cavity 13 and wound around a winding device 15b. At this time, the base film 5 of the transfer foil 4 is disposed in close contact with the core 11 formed on the movable die 12a side, and the adhesive layer 3 (printing layer 2) is the cavity.
It is located on the 13th side. The transfer foil 4 is automatically fed with one cycle of molding work. Therefore, it is preferable to provide a sensor (not shown) on the supply path of the transfer foil 4 and in the vicinity of the movable die 12a, and to control the supply pitch of the transfer foil 4 by this sensor.

Transfer foil 4 fed into cavity 13
Are vacuum-sucked through the holes formed in the core 11 of the movable die 12a and come into close contact with the surface of the core 11. Mold 12 in this state
And the semitransparent different color resin material is injected from the heating cylinders 14a and 14b, the injected semitransparent different color resin material merges and mixes in the connection block 16, and passes through the nozzle 17, the runner 18, and the sprue 19 to the gate 20. Is injected into the cavity 13 from. In this process, the plurality of semitransparent 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 semitransparent different-color resin materials is formed.

The molded body 1 is made of a resin material mixed with a plurality of semitransparent different color resin materials injected into the cavity 13.
And the printing layer 2 is bonded to the back surface of the molded body 1 through the adhesive layer 3 of the transfer foil 4 at the same time, and the molded body 1 and the transfer foil 4 are integrated. When the movable die 12a is moved to open the forming die 12 after the formed body 1 has cooled after a predetermined time has passed, the base film 5 of the transfer foil 4, the vapor deposition layer 7 and the printing are printed along with the movement of the movable die 12a. The layer 2 peels off with the peeling 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 multi-color molded product A, B is manufactured by integrally forming the print layer 2 on which the marble pattern is printed on the back surface of the molded product 1 molded by mixing and injecting a plurality of translucent 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 semitransparent different color resin materials are mixed in advance from the heating cylinder 21 and injecting it into the cavity 13. At the same time, a core 11 is provided on the back surface of the molded body 1.
Printed layer 2 and vapor deposition layer 7 of transfer foil 4 arranged on top
It is a device that integrates. When manufacturing the multicolor molded products A and B using the above-described molding apparatus, it is possible to supply a desired type of semitransparent different color resin material to the heating cylinder 21. That is, when molding the molded body 1, the molded body 1 is
It is possible to mold with more than one kind of translucent different color resin material. Therefore, it becomes possible to form a more complicated marble pattern, and a multicolor molded product A having an improved aesthetic appearance,
It becomes possible to manufacture B.

[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,
The basic pattern can be stabilized. In addition, the variation in the pattern of the pattern formed by the mixed state when a plurality of semitransparent different-color resin materials are mixed and injected can reduce the uniform feeling to the multicolor molded product and improve the individual feeling. Further, since the molded body is molded from the translucent different-color resin material, a difference in the depth direction occurs between the pattern printed on the print layer and the pattern of the molded body, and this difference makes it possible to obtain a three-dimensional effect of the pattern. 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, 7 is a vapor deposition layer, 11 is a core, 12 is a molding die, 12a is a movable die, 12b is a fixed die, 13 is a cavity, 14a, 14b and 21 are heating cylinders, 15a is A feeding device, 15b a winding device, 16 a connecting block, 17 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 molding layer formed by mixing and ejecting a plurality of translucent different-color resin materials is integrally formed with a printing layer on which a predetermined pattern is printed. 2. A transfer foil having a printing layer on which a predetermined pattern is printed is arranged on the back surface side of the molded product in the molding die, the molding die is closed, and then a plurality of semi-transparent molds are formed on the molding die. Of a multicolor molded product characterized by mixing and injecting different colored resin materials in a circular shape, then opening the molding die, peeling the transfer foil from the molded product, and transferring the printing layer to the back surface of the molded product. Method.