JPH0655562A - Molding method and apparatus of synthetic resin - Google Patents

Abstract

PURPOSE:To manufacture two or more, large and small molded items of an optional size at one time thereby to improve the manufacturing efficiency and realize the mass production, by a method whereby a synthetic resin material is injected to a lower mold from each nozzle with the upper and lower molds left opened, a main body of a tube of an injector is taken out, and the upper mold is set for molding. CONSTITUTION:A plurality of lower molds 2... for molding predetermined items are set on a lower base 1, and a plurality of upper molds 4... corresponding to the lower molds 2... are set to an upper base 3. A tubular part 6 of an injector 5 coming in and out between the upper and lower molds 4 and 2 is provided with nozzles 7... of the number and interval agreed with those of the molds. With the upper and lower molds 4, 2 left opened, the injector 5 is moved to the middle part of the molds and ends of a plurality of nozzles 7 of the tubular part, 6 are positioned above the lower molds 2. A synthetic resin material (a) is, while being regulated, injected from each nozzle 7 to the lower molds 2. After the tubular part 6 is taken out from between the upper and lower molds 4 and 2, the upper molds 4 are set for molding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for molding synthetic resin in a stamping mold system.

[0002]

2. Description of the Related Art Heretofore, there has not been a molding method for a stamping mold system that uses a plurality of nozzles or can freely adjust the nozzles.

[0003]

Therefore, the present invention is to provide a method and apparatus for simultaneously molding a plurality of products having different shapes and sizes by using a molding method using a plurality of nozzles.

[0004]

According to the present invention, an injector is installed at a lateral position of both upper and lower molds so as to move in and out between the upper and lower molds. This is a synthetic resin molding device provided with nozzles and adjusting valves respectively.

[0005]

[Operation] With the upper and lower molds open, the injection machine is moved to the middle part to position the tips of the nozzles of the tubular body above the lower mold, and the necessary nozzle adjustments are made. After opening the valve and closing the adjustment valve of the unnecessary nozzle, a proper amount of synthetic resin material is injected from the opening of the nozzle and stopped. As a result, the required amount of synthetic resin material is supplied to the lower mold. (See Figure 1)

After the synthetic resin material is injected and supplied, the tubular portion of the injection machine is completely drawn out between the upper and lower molds, and then the upper mold is set and molding is performed between the lower mold and the lower mold. (See Figure 2)

After molding, the upper mold is separated from the lower mold and the molded product is taken out. (See Figure 3)

[0008]

EXAMPLE 1 1 is a lower base, on which a plurality of lower molds 2 for forming a predetermined product are installed.

Reference numeral 3 denotes an upper base, on which a plurality of upper molds 4 ... For molding a predetermined product corresponding to the lower molds 2 are mounted.

Reference numeral 5 denotes an injection machine which goes in and out between the upper and lower molds 2 and 4, and a nozzle body 7 of the injection machine is provided with nozzles 7 ... In accordance with the number and intervals of the molds. Further, each nozzle is provided with a regulating valve 8 ...

A is a synthetic resin material injected from the nozzle 7 ...
b is a product during molding, and c is a product after molding.

[0012]

Since the present invention is such a method and apparatus, in the injection molding of the stamping mold system, any large or small synthetic resin molded products can be simultaneously molded.
It is possible to manufacture more than one piece, and of course, it is possible to manufacture a plurality of molded products of the same mold, and it is possible to improve production efficiency and realize mass production.

[Brief description of drawings]

FIG. 1 is a front view of a main part before molding

FIG. 2 is a front view of the main part during molding

FIG. 3 is a front view of the main part after molding

FIG. 4 is a front sectional view of the nozzle portion when the adjustment valve is opened.

FIG. 5 is a front sectional view of the nozzle when the adjusting valve is closed.

[Explanation of symbols]

 2 Lower mold 4 Upper mold 5 Injection machine 6 Tube part 7 Nozzle 8 Adjustment valve

Claims (2)

[Claims] 1. In a state in which the upper and lower molds are opened, an injection machine is moved to an intermediate portion of the mold to position the tips of a plurality of nozzles of the tubular body above the lower mold, and each nozzle is made of a synthetic resin material. While injecting into the lower mold, pulling out the tubular part of the injection machine from between the upper and lower molds, and then setting and molding the upper mold. 2. An injection machine is installed at a lateral position of the upper and lower molds so as to move in and out between the upper and lower molds, and a plurality of nozzles are provided in the tubular portion of the injection machine and control valves are provided respectively. A synthetic resin molding device provided.