Heated and cooled valve stem for an injection molding apparatus

Details Heated and cooled valve stem for an injection molding apparatus Heated and cooled valve stem for an injection molding apparatus

1991-05-30

1992-11-10

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

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

With means to heat or cool

26432814, 425562, 425564, B29C 4523

Patent

active

051621258

ABSTRACT:
A mold cavity, a molten plastic inlet conduit for communication therewith and a channel in the inlet conduit for conveying molten plastic to the mold cavity. Separate heating and cooling are provided in the inlet conduit adjacent the mold cavity to closely control the temperature of the molten plastic in the channel adjacent the mold cavity.

REFERENCES:
patent: 2508988 (1950-05-01), Bradley
patent: 4125352 (1978-11-01), Gellert
patent: 4276015 (1981-06-01), Rogers
patent: 4406609 (1983-09-01), Gellert
patent: 4438064 (1984-03-01), Tsutsumi
patent: 4443177 (1984-04-01), Modur et al.
patent: 4521179 (1985-06-01), Gellert
patent: 4687613 (1987-08-01), Tsutsumi
patent: 4955804 (1990-09-01), Martell
patent: 5012839 (1991-05-01), Rogers et al.
patent: 5049062 (1991-09-01), Gellert

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