Injection molding apparatus

Details Injection molding apparatus Injection molding apparatus

1976-01-28

1978-12-05

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

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

With means to heat or cool

425568, 425571, 425DIG227, B29F 103

Patent

active

041283856

ABSTRACT:
An improved injection mold apparatus and method includes a gate interposed between a mold chamber or cavity and a runner passageway. The cross sectional opening of the gate is non-circular in shape and may comprise a plurality of foliations. The non-circular shape of gate opening enables the provision of sufficient area to insure adequate filling and compacting of molding material in a mold chamber within a reasonable time interval and also avoids difficult problems such as drooling, stringing, and/or freeze-off or blocking of material-supply passageways.

REFERENCES:
patent: 2773284 (1956-12-01), Kelley
patent: 3800027 (1974-03-01), Tsutsumi
patent: 3822856 (1974-07-01), Gellert
Modern Plastics Encyclopedia, 1966 .COPYRGT. Sept. 1965, pp. 725 & 726.

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