Injection molding process and apparatus

Details Injection molding process and apparatus Injection molding process and apparatus

1976-10-21

1978-03-07

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means between charger and mold to cut off flow of...

425577, B29F 103

Patent

active

040777600

ABSTRACT:
There is disclosed a gating assembly provided with at least two orifices of different diameters and associated with an injection molding assembly. In an initial stage of extruding the plastic material into a mold cavity, the orifice of larger diameter is utilized to provide the fluid communication between the extruder nozzle and mold cavity whereas the orifice of smaller diameter is utilized in the final stages of injection to insure thorough packing of the plastic material in the injection mold.

REFERENCES:
patent: 3050084 (1962-08-01), Palfey
patent: 3183553 (1965-05-01), Slater
patent: 3559581 (1971-02-01), Kriz et al.
patent: 3787159 (1974-01-01), Bielfeldt
patent: 3894823 (1975-07-01), Hanning

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