Process and device for injection-molding plastics

Details Process and device for injection-molding plastics Process and device for injection-molding plastics

1981-06-26

1983-12-13

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

26432812, B29F 100

Patent

active

044204523

ABSTRACT:
Process and device for injection molding plastics. The injection material charge is introduced into the mold to obtain an uninterrupted flow front by initially injecting the material into the mold through at least one first gate and through a subsequent gate or gates only after the flow front passes the subsequent gate(s). An injection molding device having separately and variously controllable valves located in the supply lines interconnecting an injection molding apparatus, mold and gates.

REFERENCES:
patent: 2182389 (1939-12-01), Reid
patent: 2191703 (1940-02-01), Anderson
patent: 2199144 (1940-04-01), Tegarty
patent: 3861841 (1975-01-01), Hanning
patent: 4041122 (1977-08-01), Quick

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