Injection molding machine and injection molding method

Details Injection molding machine and injection molding method Injection molding machine and injection molding method

1998-02-24

2000-05-16

Lin, Kuang Y.

Metal founding

Process

Shaping liquid metal against a forming surface

164317, 164318, B22D 1704

Patent

active

060622946

ABSTRACT:
An injection molding machine having a simple structure and adapted to quickly operate for injection molding without taking in air bubbles is provided. The injection molding machine comprises a plunger and a nozzle for injecting the molten metal fed from the plunger into a metal mold. The plunger has a cylinder section with a through hole bored through an upper portion of its lateral wall for introducing the molten metal, and a piston for slidingly reciprocating within the cylinder section. A communication hole is bored through the piston and communicates with the through hole at a predetermined position. The communication hole runs from the lateral wall of the piston through the inside thereof and has a non-return valve arranged therein to allow only a flow from the lateral wall of the piston.

REFERENCES:
patent: 3777943 (1973-12-01), Spalding et al.

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