JPS6218330B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pattern body for molding a synthetic resin molded product having a band-like color pattern and a method for molding the pattern body. The purpose of the present invention is to firmly assemble a pattern body into the mold to function as a part of the mold, and to make it easy and accurate to set the position for assembling it into the mold. This is what I did.

Another object is to simplify the handling of the pattern when a plurality of pattern pieces are used in a single molded article.

Another object is to easily mold a single pattern body having a plurality of pattern pieces by making each pattern piece a different color.

Still another object is to further strengthen the welding of the pattern piece to a base body that is injection molded as part of a molding die.

There are many molded products that are made by injection molding a base body that forms a ground color portion using a pattern body that has been injection molded into a predetermined shape as part of an injection mold.

In such a molded product, welding between the base body and the pattern body is achieved at the same time as the base body is molded, and the welding is strong. This has the advantage that the process is extremely smooth.

Therefore, this type of molded product is used as a relatively high-grade product such as a cosmetic tool or a cosmetic container, that is, a molded product that is required to have a beautiful appearance and a good texture.

Conventionally, the biggest problem with this type of molded product is that the injection pressure of the base body is quite high and the mold is subjected to relatively severe vibrations, so The assembly position of the pattern body incorporated into the mold was shifted.

Therefore, the structure of the pattern body has been limited to one that can be fitted and assembled into the mold to prevent it from being unnecessarily displaced within the molding space.

In other words, conventional molded products of this type are limited to relatively tall items such as caps, boxes, and bottles, and in the case of tall molded products like this, the pattern is placed in the mold. This is because the pattern could be attached and held almost immovably to the mold simply by fitting it into the mold.

However, although this can be done in the case of tall molded products, the band-like color pattern obtained by this pattern is monochromatic, and the molded product is completely divided by this color pattern. Because it was not possible to form a band-like pattern, the pattern was simple and uninteresting.

The present invention relates to a completely new pattern that is used to mold a molded product by injecting the pattern as part of a mold for forming a base body.One embodiment of the present invention will be described below with reference to the drawings. do.

The basic structure of the pattern body 1 according to the present invention is a molded product S
a pattern piece 10 that draws a band-shaped color pattern M on the surface of the pattern piece 10;
It consists of positioning pieces 15 integrally provided on both sides of this pattern piece 10 via connecting pieces 11.

In the case of the illustrated embodiment, the positioning piece 15 is molded integrally with the die-cutting protrusion 12 from the mold for forming the pattern body 1, but the positioning piece 15 itself may be used as the die-cutting protrusion 12. Needless to say.

This positioning piece 15 is designed to fit snugly into a holding hole 50 cut in the mold surface of one or both of the molding dies 4 and 5 for the molded product S, which is removed from the mold surface. In this way, the positioning piece 15 is inserted into the holding hole 50 of the mold 4 or 5.
By fitting them together, the pattern piece 10 is immovably held at a predetermined position within the molding space formed by both the molds 4 and 5.

Furthermore, the connecting piece 11 that connects the pattern piece 10 and the positioning piece 15 is a kind of gate, and is set to a thickness that can be easily removed from the pattern piece 10 after the base body 2 is formed. , as is clear from FIG. 5, the length of this connecting piece 11 is
It is desirable that the width be larger than the required width of the mold mating surface.

It goes without saying that a groove 51 in which the connecting piece 11 can be tightly positioned is cut in the mold mating surface portion of both the molds 4 and 5 facing the connecting piece 11.

Further, the end face of the pattern piece 10 to which the base body 2, which is injection-molded with the pattern piece 10 as part of the molding die, is welded is provided in order to achieve stronger welding between the base body 2 and the pattern piece 10. , as shown in Figure 3,
It is advantageous to provide the protrusions 10a along the longitudinal sides.

As described above, since the pattern body 1 according to the present invention is immovably assembled and held in the molds 4 and 5 by the positioning pieces 15 integrally provided on both sides of the pattern piece 10, The molding space formed by 4 and 5 is completely divided by pattern piece 10.

Therefore, when injection molding the base body 2,
For each molding space divided by the pattern piece 10,
It is necessary to provide a gate 21 having a flow passage cross-sectional area proportional to the volume of the molding space.

Note that each gate 21 may be connected to one runner 20.

In the illustrated embodiment, two band-shaped color patterns M are formed on a molded product S, and the pattern body 10 consisting of a pattern piece 10 and a positioning piece 15 may be molded separately and handled individually. However, in the illustrated embodiment, one of the positioning pieces 15 is integrally connected by a connecting piece 14 via a connecting piece 13.

In this way, two or more pattern pieces 10
By joining the pattern body 1 together with the connecting piece 14, the handling of the pattern body 1, especially when the pattern body 1 is connected to the mold 4,
The handling operation when assembling to 5 is advantageous.

Further, when two or more pattern pieces 10 are configured to be integrally connected between one of the positioning pieces 15 by the connecting piece 14, the cavity side for forming each positioning piece 15 on the side that is not connected by the connecting piece 14 Therefore, as shown by arrows M and N in FIG. 1, if molding materials for pattern body 1 of different colors are injected at a speed proportional to the volume of each pattern piece 10, both molding materials will flow into portions of pattern piece 10 that do not correspond. Since the pattern pieces 10 in multiple colors can be integrally molded, the pattern pieces 10 in multiple colors can be integrally molded because they always join together at the connecting piece 14 via the cavity for forming the positioning piece 15.

Furthermore, as described above, the band-shaped color pattern M formed by the pattern pieces 10 completely divides the ground color portion J of the molded product S, and this extends over the entire thickness range of the molded product S. By molding the pattern piece 10 from a colored transparent synthetic resin material, a molded product S having an unprecedented color pattern can be obtained.

In the case of the illustrated embodiment, the connecting piece 14 is separate from the positioning piece 15 and integrated with the connecting piece 13, but in some cases, one positioning piece 15 may be directly integrated with the positioning piece 15. They may be connected by a connecting piece 14 and integrated with a positioning piece 15 to provide positioning ability.

As is clear from the above description, the present invention can easily and reliably mold a molded product S having a completely new band-like color pattern M, and is not limited to the shape of the molded product S, even if it is a flat plate shape. The molded product S can be molded without any problems, and it has a wide variety of shapes and colors, and the transparency and color pattern itself can be freely set, and it is easy to handle and work. As a pattern for synthetic resin molded products having uniform striped color patterns that are easy to remove, it has many excellent effects in terms of molding, color pattern formation, and handling.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the pattern body according to the present invention, FIG. 2 is a longitudinal sectional view taken along line A-A in FIG. 1, and FIG. 3 is a base of the pattern piece. FIG. 3 is an enlarged vertical cross-sectional view showing an example of an end surface welded to the body. Fig. 4 is a plan view showing the state in which the pattern body is assembled to the mold device for molding a molded product, and Fig. 5 is a B--
FIG. 6 is a longitudinal cross-sectional view taken along the line B--C in FIG. 4. 7 is a plan view of a molded product molded using the pattern shown in FIG. 1, and FIG. 8 is a longitudinal sectional view taken along line D-D in FIG. be. Explanation of symbols, 1; pattern body, 10; pattern piece, 10
a; Convex strip, 11, 13; Connecting piece, 12; Die cutting protrusion, 14; Connecting piece, 15; Positioning piece, 2; Base body, 20; Runner, 21; Gate, 4, 5;
Mold, 50; Holding hole, 51; Concave groove, S; Molded product,
M: band-like color pattern, J: ground color area.

Claims (1)

[Scope of Claims] 1 A pattern body 1 for molding a synthetic resin molded product S having a completely traversed band-like color pattern M, which is connected to both sides of a pattern piece 10 forming the band-like color pattern M. A pattern body for molding a synthetic resin molded product having a band-shaped color pattern, which is integrally provided with a positioning piece 15 via a piece 11. 2 A pattern body 1 for molding a synthetic resin molded product S having two or more completely transverse band-like color patterns M, and a pattern piece 10 forming the band-like color patterns M.
A positioning piece 15 is attached via a connecting piece 11 to both end faces of the
A pattern body for molding a synthetic resin molded product having a band-shaped color pattern formed by integrally providing two positioning pieces 15 and integrally connecting one positioning piece 15 with a connecting piece 14. 3. A pattern body for molding a synthetic resin molded product having a band-shaped color pattern as set forth in claim 1 or 2, in which the pattern body 1 is molded from a colored transparent synthetic resin. 4. A pattern body for molding a synthetic resin molded product having a band-shaped color pattern as set forth in claim 2, in which each pattern piece 10 is set to a different color. 5. Molding of a constituent resin molded product having a band-like color pattern as set forth in claim 1 or 2, in which a convex strip 10a is provided on the end surface of the molded product S that is joined to the base body 2 forming the ground color portion J. Pattern body for. 6 The material for forming the pattern body 1 is injected from the cavity side for forming the positioning piece 15 on the side not connected by the joint piece 14 through a gate with a flow passage cross-sectional area proportional to the volume occupied by the pattern piece 10, and each pattern piece 10 is injected. A method for molding a patterned body for molding a synthetic resin molded product having a band-shaped color pattern in which molding materials meet at a joint piece 14 portion via a cavity for forming a positioning piece 15.