JPH0880540A - Plastic molding - Google Patents

Abstract

PURPOSE: To obtain a cylindrical canlike plastic molding which can be manufactured without taking much time and can be treated with foil decorating without taking much time. CONSTITUTION: A plastic integrated molded piece consisting of first and second half parts 1 and 2 having shapes formed by dividing a bottom and a barrel of a cylindrical can into two parts vertically, a connecting section 3 for connecting the two half parts 1 and 2 so as to let their bottom parts face each other, and a cover part 4 connected to other end of the half part 2 is formed by injection molding. Simultaneously with the injection molding, a picture pattern is partially transferred to the half part 1. The integrated molded piece which is formed by transfer molding in this way is assembled so as to form a cylindrical canlike plastic molding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic molded product used as a dummy can for display in a vending machine, for example.

[0002]

2. Description of the Related Art In a vending machine for soft drinks, a dummy can is generally displayed as a product sample. These dummy cans are usually molded plastic products. Also, as described in, for example, Japanese Patent Application Laid-Open No. 2-41597 and Japanese Utility Model Application Laid-Open No. 2-2783, a dummy can is a cylindrical molded product having no bottom, and illumination is applied from the lower inside. is there.

[0003] By the way, in the case of molding a cylindrical can-shaped plastic molded product having a bottom and a lid, conventionally, for example, a can that is vertically divided into two parts and has concave and convex portions for fitting is individually injection-molded, There were two parts that were fitted and integrated into a cylindrical can shape, or three parts that were attached with a lid separately. And if the molded product is a dummy can used for display on vending machines, etc.,
After being integrated and formed into a cylindrical can shape, a film on which a pattern is printed is wound around the entire surface and attached, or shrinked.

[0004]

In the case of molding a cylindrical can-shaped plastic molded product having a bottom and a lid, conventionally, the two-divided products as described above are individually injection-molded and then fitted together. Since it was molded by such a method that it was integrated, the manufacturing process was complicated and time-consuming. Also, if the molded product is a dummy can for display, it would be time-consuming to stick a film with a pattern on the entire circumference or shrink it after molding as in the past, which is time-consuming and may not be possible depending on the purpose of use. Wrapping the film up to the required part wasted, leading to higher costs.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a cylindrical can-shaped plastic molded product which does not require much labor for manufacturing and requires less labor for painting.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides a plastic molded product which is formed by assembling an integrally molded product by injection molding into a cylindrical can shape. Here, the integrally molded product may be composed of two semi-cylindrical molded parts and at least one circular lid part, each of which constitutes a half-divided body part, and each of them is connected via a hinge. it can.

Further, according to the present invention, in the case of a dummy can for display of a vending machine, it is not necessary to attach a pattern because the parts other than the front side can not actually be seen when used. In that case,
We found that it is relatively easy to attach a pattern by partial transfer of the in-mold on the front side only, and it is also advantageous in terms of cost. It is proposed that the pattern be transferred only to the surface of one half-divided body by inserting a transfer film into.

[0008]

The plastic molded product of the present invention is integrally molded at the stage of injection molding and is assembled into a cylindrical can shape. Therefore, the manufacturing process is different from the one in which the injection molded products are separately fitted and integrated. It's easy and hassle free.

Further, the transfer can be performed only on one of the semi-cylindrical molding portions at the same time as the injection molding, so that painting is not troublesome.

[0010]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a plastic integrally molded product after injection molding and before assembly, which is an intermediate product of a dummy can for display in a vending machine according to an embodiment of the present invention, and FIG. 2 shows the integrally molded product shown in FIG. FIG. 3 is a cross-sectional view of an injection molding die for obtaining, and FIG. 3 is a perspective view of a plastic molded product (dummy can) obtained by assembling the integrally molded product shown in FIG.

The plastic integrally molded product (intermediate product) shown in FIG. 1 has a first half-split part 1 and a second half-split part 2 each having a shape in which the bottom and the body of a cylindrical can are vertically half-split. , A connecting portion 3 which hinge-connects these two half-divided portions 1 and 2 so that the bottom portions thereof face each other, and a hinge connection to the other end of one half-divided portion (second half-divided portion) 2. It is composed of a lid 4. This integrally molded product is injection-molded by the mold shown in FIG. At that time, one of the half-divided portions 1 and 2 (the first half-divided portion 1 in the figure) is formed by in-mold transfer.
The pattern is transferred to the outer peripheral surface (the part with a grid pattern in the figure).

As shown in FIG. 2, the mold is a fixed mold 1.
1 and the movable-side die 12 are included. Movable mold 1
Reference numeral 2 constitutes a first cavity 12A corresponding to the first half-split portion 1 and a second cavity 12B corresponding to the second half-split portion 2 and the lid portion 4, and the fixed-side mold 11
Constitutes a cavity 11A corresponding to the connecting portion 3. Further, the fixed-side mold 11 is provided with injection gates 13A and 13B at two locations so as to open at portions corresponding to the first cavity 12A and the second cavity 12B. Further, in FIG. 2, 20 is a transfer film. The transfer film 20 is, for example, a base film (PET) on which a pattern printing layer and an adhesive layer are laminated via a baking layer (release layer) and a release layer, and the adhesive layer side is fixed to the fixed side mold 11. The base film side is set so that the base film side faces the movable side mold 12.

The transfer film 20 has a width dimension that covers a portion corresponding to the first cavity 11A with a predetermined margin, and is fed by a transfer film feeding device (not shown) in a direction perpendicular to the plane of FIG. And inserted into the mold. Then, after registering the pattern and adjusting the left and right positions, the mold is closed as shown by the chain double-dashed line in FIG. Then, a synthetic resin, which is a molding material, is injected and transferred at the same time as molding.

The integrally molded product shown in FIG. 1 thus transferred and molded is bent at the center of the connecting portion 3 to form the first half-divided portion 1.
And the second half-divided portion 2 are joined, and the lid portion 4 is further folded and joined to obtain a plastic molded product (finished product) 10 shown in FIG.

FIG. 4 is a perspective view of a plastic integrally molded product (intermediate product) of another embodiment. This embodiment also relates to a dummy can for display in a vending machine. In this case, the plastic integrally molded product, which is an intermediate product, has a shape in which only the body portion of a cylindrical can is vertically halved. The half-split body part 21 (semi-cylindrical molding part), the second half-split body part 22, the bottom part 23, and the lid part 24 are the first half-split body part 21, the bottom part 23, and the second half part. The split barrel portion 22 and the lid portion 24 are hinged in this order. This plastic integrally molded product is also molded by injection molding, and at this time, the outer peripheral surface of one of the half body parts 21 and 22 (the first half body part 21 in the figure) (the part with a grid pattern in the figure) ) Is transferred to the picture. Then, it is assembled into a cylindrical can shape.
In the case of this embodiment, the hinge connecting portion is increased by one place as compared with the previous embodiment, but the protruding portion of the hinge connecting portion 3 at the bottom is eliminated, and it becomes possible to stand by itself and the appearance is remarkably good. Become. Further, if the bottom portion 23 is provided with a substantially circular opening, it will look even better when lighted up.

Needless to say, the present invention is not limited to the dummy cans for display of vending machines, but can be applied to various fields.

[0018]

According to the present invention, a cylindrical can-shaped plastic molded product can be obtained by assembling an integrally molded intermediate product at the injection molding stage, and the manufacturing process is simple and labor-free.

Further, by performing partial transfer simultaneously with injection molding, it is possible to easily paint a cylindrical can-shaped plastic molded product which requires a pattern only on one side of the body.

[Brief description of drawings]

FIG. 1 is a perspective view of a plastic integrally molded product (intermediate product) according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of an injection molding die according to an embodiment of the present invention.

FIG. 3 is a perspective view of a plastic molded product obtained by assembling the integrally molded product shown in FIG.

FIG. 4 is a plastic integrally molded product according to another embodiment of the present invention (a perspective view of an intermediate product).

[Explanation of symbols]

 1 1st half-divided part 2 2nd half-divided part 3 Connection part 4 Lid part 10 Plastic molded product (completed product) 21 1st half-divided body part (semi-cylindrical shaped part) 22 2nd half-divided body Part (semi-cylindrical molding part) 23 bottom part 24 lid part

Claims (3)

[Claims] 1. A plastic molded product, characterized in that an integrally molded product formed by injection molding is assembled into a cylindrical can shape. 2. The integrally molded product is composed of two semi-cylindrical molded parts and at least one circular lid part, each of which constitutes a half-divided body, and they are connected to each other via a hinge. The molded plastic product according to claim 1. 3. The plastic molded product according to claim 1, wherein the pattern is transferred only to the surface of one of the half-divided cylinders by inserting a transfer film into a part of the mold during injection molding.