Injection molding valve member with head and neck portions

Details Injection molding valve member with head and neck portions Injection molding valve member with head and neck portions

1996-06-12

1997-12-09

Heitbrink, Tim

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...

2643289, 425566, B29C 4523

Patent

active

056957939

ABSTRACT:
An injection molding valve member having a smaller neck portion leading to a short head portion. This facilitates the backflow of melt around the head portion as the valve member is driven forwardly to the closed position. In one embodiment, the neck portion is formed by a number of flutes spaced around the valve member having lands between them.

REFERENCES:
patent: 4013393 (1977-03-01), Gellert
patent: 4285661 (1981-08-01), Yotsutsuji et al.
patent: 4521179 (1985-06-01), Gellert
patent: 4781572 (1988-11-01), Boring
patent: 5002480 (1991-03-01), Gellert et al.
patent: 5423672 (1995-06-01), Gordon

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