JPH079475A - Hollow body molding method and hollow body - Google Patents

Abstract

PURPOSE:To allow a material contained in a molded article to be identified from the external by a method wherein a hollow body is obtained by combining a pair of semi-molded pieces esp. injection molded, an insert piece, such as a closure, is fitted into the hollow body in one molding process, and the paired semi-molded pieces are different in color or material. CONSTITUTION:In a hollow body molding method and a hollow body, a hollow body 3a with an insert piece 23 fitted therein is obtained by automatically fitting the insert piece 23 into the hollow body 3a obtained by combining a pair of semi-molded pieces 33aA, 35aA, the semi-molded pieces 33aA, 35aA different from each other in color or material can be integrally combined through a combining resin 40 into the molded article 3a, and the hollow article 3a with the insert piece 23 fitted therein is obtained by using the semi-molded pieces 33aA, 35aA different from each other in color or material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding method and a hollow body for producing a hollow body by uniting a pair of injection-molded semi-molded articles, and particularly to an insert article such as a plug in the hollow body.
The present invention relates to a novel improvement that is provided during a molding process and that allows a pair of semi-molded products to have different colors or materials so that the materials contained in the molded products can be identified from the outside.

[0002]

2. Description of the Related Art As a hollow body of this type, generally, an insert product after molding is manually inserted. Further, in the case of molding one hollow body using a pair of semi-molded products of different materials or different colors, a representative method is the method shown in FIG. That is, what is indicated by reference numeral 1 in FIG. 5 is a first semi-molded product molding step of molding the first semi-molded product 1a. 1 injection / pressure holding 1B, 1st cooling plasticizing 1C, 1st mold opening 1D and 1st taking-out 1E, and then 1st semi-molded product 1a
Is obtained.

The one designated by reference numeral 2 is the second semi-molded product 2a.
Is a second semi-molded product molding step. In this second semi-molded product molding step 2, the second mold closing 2A, the second injection / holding pressure 2
The second semi-molded product 2a is obtained through B, the second cooling plasticization 2C, the second mold opening 2D and the second take-out 2E.

Further, the reference numeral 3 is a step 3 in which the respective semi-molded products 1a and 2a are united and the bonding resin 3b is injected onto the mating surface to make one hollow body 3a. The semi-molded products 1a and 2a are integrated in the insert step 4 through the third mold closing 3A, the third injection / holding pressure 3B, the third cooling plasticizing 3C, the third mold opening 3D, and the third unloading 3E. Thus, the hollow body 3a can be obtained.

As another conventional method, for example, in the method of molding a hollow body disclosed in Japanese Patent Publication No. 2-38377, a single injection cylinder is used to simultaneously mold a pair of semi-molded products. After that, the slide mold is slid to integrate the respective semi-molded products.

[0006]

Since the conventional method for molding a hollow body is configured as described above, the following problems exist. That is, in the case of the first conventional method shown in FIG. 5, three injection cylinders had to be used, the production efficiency was extremely low, and it was not suitable for mass-produced products at low cost. In addition, in the method of molding the hollow body of the second conventional example, one injection cylinder is used, while it is possible to mass-produce inexpensively. Therefore, the color or material of the pair of semi-molded products is changed to change the material of the content of the molded product. We were unable to meet the request to identify us from the outside.

The present invention has been made in order to solve the above problems, and in particular, by distinguishing the color or material of a pair of semi-molded products from each other, it is possible to identify the containing material in the molded product. It is an object of the present invention to provide a method for molding a hollow body and a hollow body that are made possible.

[0008]

A method of molding a hollow body according to the present invention has a slide mold between a fixed mold and a movable mold,
In a method for molding a hollow body, in which a pair of semi-molded products are united by sliding this slide mold to obtain a hollow body, the thickness is slightly larger than the thickness of the groove in the groove formed in the hollow body. It is a method of inserting an insert product having a thickness in a compressed state via an insert means.

The method of molding a hollow body according to the present invention has a slide mold between a fixed mold and a movable mold, and the slide mold is slid to combine a pair of semi-molded products to obtain a hollow body. In the hollow body molding method described above, a pair of injection cylinders for injecting molding materials of different colors or materials are used to obtain the respective semi-molded products having different colors or materials, and the injection is performed by any of the injection cylinders. It is a method of molding a hollow body in which the above-mentioned respective semi-molded products are combined with each other using the molding material.

More specifically, it is a method in which an insert having a thickness slightly larger than the thickness of the groove is inserted into the groove formed in the hollow body while being compressed through the insert means.

The hollow body according to the present invention is a hollow body formed by sliding a slide die and combining injection-molded first and second semi-molded products. The hollow body is formed at the end of the first semi-molded product. And a second recess formed on the inner surface of the second semi-molded product, a groove formed by each of the recesses, and an insert product fitted in the groove. .

In the molded product according to the present invention, a slide mold is slid and a pair of injection-molded semi-molded products are united to form a pair of semi-molded products having different colors or materials from each other. It has a structure in which it is integrally formed of a bonding resin having the same color or material as any one of them.

More specifically, each of the semi-molded products is provided with a bonding resin for integrally bonding the semi-molded products, the semi-molded products having different colors or different materials from each other, and the bonding resin is made of the semi-molded products. It has the same color or material as any of the products.

[0014]

In the hollow body molding method and hollow body according to the present invention, a slide mold is provided between the fixed mold and the movable mold, and the slide mold is slid to combine a pair of semi-molded products.
By inserting the insert product compressed into the groove of the hollow body via the insert means, the molding and the insertion of the insert product can be performed in one molding step. In addition, the molding materials of different colors or materials injected from the pair of injection cylinders are individually injected into the movable mold cavity and the slide mold cavity to mold a pair of semi-molded products, and then the slide mold is slid. By moving each semi-molded product to unite, and by integrally bonding each molded product with the coupling resin injected from one of the injection cylinders, a hollow that combines a pair of semi-molded products of different colors or materials You can make a body.

[0015]

The preferred embodiments of the hollow body molding method and hollow body according to the present invention will now be described in detail with reference to the drawings. It should be noted that the same or equivalent parts as those of the conventional example are designated by the same reference numerals for description. 1 to 4 show a hollow body molding method and a hollow body according to the present invention. FIG. 1 is a flow chart, FIG. 2 is a block diagram of a hollow body injection type injection molding machine, and FIG. FIG. 4 is an enlarged detailed view of a main part, and FIG. 4 is a configuration diagram showing a hollow body.

First, a hollow body injection molding machine 30 applied in the present invention will be briefly described with reference to FIGS. 2 and 3.
Regarding the injection molding machine of this system, Japanese Patent Publication No. 2-3837
Although detailed description is omitted because it has been described in detail in Japanese Patent Publication No. 7, the fixed mold 34 is fixedly arranged with respect to the movable mold 33 that is reciprocally provided via the tie bar 32 of the main body 31. A slide die 35 is slidably provided between the movable die 33 and the fixed die 34.

First and second injection cylinders 36 and 37 are connected to the fixed mold 34, and each injection cylinder 3
Molding materials of different colors or materials from 6, 37,
First cavity 35a of slide die 35 and movable die 33
A spool or the like (not shown) is formed so that each of the second cavities 33a can be independently supplied. The slide mold 35 is configured to slide back and forth in the direction of arrow A via a slide cylinder (not shown).

Next, a case where the hollow body 3a shown in FIG. 4 is molded using the die slide injection type injection molding machine 30 described above will be described. First, as shown in FIG.
In the primary molding 20, after the first mold is closed 1A, molding materials of different colors or materials are injected from the injection cylinders 36, 37, respectively, and the injection holding pressures 1B, 1B of the injection cylinders 36, 37, respectively.
2B, cooling and plasticizing 1C and 2C are performed, and first mold opening 1D is performed to complete the primary molding, and the first and second semi-molded products 33 are formed in the cavities 33a and 35a.
Mold aA and 35aA.

Next, the slide mold 3 is used as the secondary molding 21.
5 is slid, and in this die sliding step 22, an insert product 23 such as a rubber stopper formed by the first recess 33aB of the first semi-molded product 33aA and the second recess 35aB of the inner surface of the second semi-molded product 35aA. The insert 23 is inserted into the groove 100, which is slightly thinner than the thickness, by an automatic inserting means (not shown). in this case,
Since the insert 23 having a thickness slightly larger than the thickness T of the groove 100 is inserted, the insert 23
The insert 23 is securely accommodated in the groove 100 by being fitted into the groove 100 during one molding process in a state of being compressed from the original shape.

Next, after the second mold closing 10, the second injection cylinder 37 (or the first injection cylinder 36 may be used) is used to apply a ring-shaped coupling resin 40 to each of the half-molded products 33aA, 35a.
By injecting into the groove 41 between A, an integral hollow body 3a is obtained. Therefore, the colors or materials of the respective semi-molded products 33aA, 35aA of the hollow body 3a are different from each other, whereby the materials such as chemicals contained in the molded product can be identified. The color or material of the above-mentioned bonding resin 40 is the same as that of any of the semi-molded products 33aA and 35aA. It goes without saying that it is of course possible to make the same color or material of the above-mentioned semi-molded products 33aA and 35aA. Therefore, according to the present invention, the hollow body 3a containing the insert product 23, the hollow product 3a in which the respective semi-molded products 33aA, 35aA have different colors or materials, and the bonding resin 40 has any color or material, and
It is possible to manufacture any of the hollow products 3a in which the respective semi-molded products 33aA and 35aA have different colors or materials.

[0021]

EFFECTS OF THE INVENTION Since the hollow body molding method and the hollow body according to the present invention are configured as described above, in one molding step, inserts such as stoppers are inserted into the hollow body without manpower. A hollow body in a state can be obtained.
Further, it is possible to obtain a hollow body in which the color or material of each of the semi-molded products is different, whereby it is possible to externally identify the type of drug, medicine or the like contained in the molded product, and in the conventional method. It is possible to inexpensively make a large quantity of impossible colored products with two colors.

[Brief description of drawings]

FIG. 1 is a flow chart showing a method for molding a hollow body according to the present invention.

FIG. 2 is a configuration diagram showing an injection molding machine.

FIG. 3 is an enlarged detailed view of a main part of FIG.

FIG. 4 is a cross-sectional view showing a molded product.

FIG. 5 is a flowchart showing a conventional method.

[Explanation of symbols]

 3a Hollow body 33 Movable type 34 Fixed type 35 Sliding type 33aA, 35aA Semi-molded article 36, 37 Injection cylinder 40 Resin for coupling

Claims (6)

[Claims] 1. A pair of semi-molded products (33aA, 35aA) having a slide mold (35) between a fixed mold (34) and a movable mold (33) and sliding the slide mold (35). In the method of molding a hollow body, which is made to obtain a hollow body (3a), the thickness (T) of the groove (100) in the groove (100) formed in the hollow body (3a) A method for molding a hollow body, comprising inserting an insert product (23) having a slightly large thickness in a compressed state via insert means. 2. A pair of semi-molded products (33aA, 35aA) having a slide mold (35) between a fixed mold (34) and a movable mold (33) and sliding the slide mold (35). In the method for molding a hollow body, the hollow bodies (3a) are united together to form a pair of injection cylinders (36, 3) for injecting molding materials of different colors or materials from each other.
7) Each of the above semi-molded products (33a
A, 35aA) and each of the semi-molded products by the molding material injected by any of the injection cylinders (36, 37).
A method for molding a hollow body, comprising molding the hollow body (3a) having (33aA, 35aA) bonded thereto. 3. An insert means (23) having a thickness slightly larger than a thickness (T) of the groove (100) in a groove (100) formed in the hollow body (3a). The method for molding a hollow body according to claim 2, wherein the hollow body is fitted in a state of being compressed via the. 4. A hollow body formed by sliding a slide die (35) and combining first and second injection-molded first and second semi-molded products (33aA, 35aA), wherein the first semi-molded product (33aA) ) And a second recess (33aB) formed at the end of the second semi-molded product (35a)
The second concave portion (35aB) formed on the inner surface of (A) and each of the concave portions (3a).
A hollow body comprising a groove (100) formed by 3aB, 35aB) and an insert (23) fitted in the groove (100). 5. A pair of semi-molded products (33aA, 35aA) different in color or material from each other by sliding a slide die (35) and combining a pair of injection-molded semi-molded products (33aA, 35aA).
The hollow body is characterized in that the above-mentioned semi-molded product (33aA, 35aA) is integrally formed with a bonding resin (40) of the same color or material. 6. Each of the semi-molded products is provided with a bonding resin (40) for integrally bonding the semi-molded products (33aA, 35aA).
(33aA, 35aA) are different in color or material from each other, the binding resin (40) is configured to be the same color or material as any of the semi-molded product (33aA, 35aA) Item 4. A hollow body according to item 4.