Injection molding process for synthetic resin and its apparatus

Details Injection molding process for synthetic resin and its apparatus Injection molding process for synthetic resin and its apparatus

1985-06-24

1987-08-18

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

425547, 425549, 425562, 425570, 425572, 425580, B29C 4520, B29C 4572

Patent

active

046876138

ABSTRACT:
This invention relates to an injection molding process for synthetic resin and its apparatus which enables the production of highly precise molded articles and a shortening of the molding time. More particularly, by actuating a forcible cooling means mounted in a mold part constituting a gate, the synthetic resin fused by local heating of the gate is cooled and solidified forcibly, thereby closing the gate. On the other hand, by stopping the forcible cooling means, the solidified resin in the gate is heated and fused by a heater mounted either inwardly of a runner or outwardly thereof.

REFERENCES:
patent: 2271063 (1942-01-01), de Mattia
patent: 2296295 (1942-09-01), Shaw
patent: 2296296 (1942-09-01), Shaw
patent: 2551439 (1951-05-01), Kovacs
patent: 3194868 (1965-07-01), Shaw
patent: 3800027 (1974-03-01), Tsutsumi
patent: 4306852 (1981-12-01), Mateev et al.

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