Injection molding apparatus for manufacturing layered articles

Details Injection molding apparatus for manufacturing layered articles Injection molding apparatus for manufacturing layered articles

1974-08-19

1976-08-03

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

425132, 4251331, 425817R, B29F 103, B29D 2704

Patent

active

039726649

ABSTRACT:
Method and apparatus for the intermittent manufacture of multi-layer shaped thermoplastic parts with a foamed core and an unfoamed shell, where at first a part of the unfoamed plastic and later a plastic that contains a foaming agent is injected simultaneously with additional unfoamed plastic into a mold through a central nozzle and a ring nozzle that surrounds it.

REFERENCES:
patent: 3070126 (1962-12-01), Schneider
patent: 3488810 (1970-01-01), Gellert
patent: 3778209 (1973-12-01), Wallace et al.

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