Injection molding system having dual feed bushing seated in mani

Details Injection molding system having dual feed bushing seated in mani Injection molding system having dual feed bushing seated in mani

1989-07-10

1990-06-12

Woo, Jay H.

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...

2643288, 2643289, 425566, 425570, 425572, 425588, B29C 4522

Patent

active

049328581

ABSTRACT:
A multi-cavity valve gated injection molding system having an elongated manifold through which a melt passage to a number of heated nozzles. A separate valve member bushing is seated in an opening through the manifold in alignment with each nozzle. The bushing is in bearing contact between the back plate and the rear face of each nozzle. The bushing has a melt duct with two smoothly curved arms which connect between the melt passage in the manifold and the melt passage around the valve member. The bushing provides a seal around the reciprocating valve member and has an outer flange which forms a combination insulative air space and containment chamber for melt which does escape.

REFERENCES:
patent: 4026518 (1977-05-01), Gellert
patent: 4268240 (1981-05-01), Rees et al.
patent: 4433969 (1984-02-01), Gellert
patent: 4521179 (1985-06-01), Gellert
patent: 4698013 (1987-10-01), Butcher
patent: 4705473 (1987-11-01), Schmidt
patent: 4740151 (1988-04-01), Schmidt
Random House, American College Dictionary, 1947, p. 459.

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