Multicavity injection molding apparatus having precision adjustm

Details Multicavity injection molding apparatus having precision adjustm Multicavity injection molding apparatus having precision adjustm

1990-06-15

1992-01-07

Heitbrink, Timothy

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...

2642972, 2643289, 425564, 425566, 425570, 425588, B29C 4523

Patent

active

050785893

ABSTRACT:
An arrangement is disclosed for independently controlling shutoff and flow to a cavity gate in a multicavity injection mold apparatus, in which a plurality of valve pins are mounted to a movable holder plate, each aligned with a cavity gate and movable thereinto to control shutoff and a plurality of fixed position plunger sleeves are each mounted over a respective valve pin and adjustably positioned with respect to a restriction feature in the supply passage upstream of the associated gate.

REFERENCES:
patent: 4279582 (1981-07-01), Osuna-Diaz
patent: 4330258 (1982-05-01), Gellert
patent: 4378963 (1983-04-01), Schouenberg
patent: 4592711 (1986-06-01), Capy
patent: 4669971 (1987-06-01), Gellert
patent: 4786246 (1988-11-01), Gellert
patent: 4917594 (1990-04-01), Gellert et al.
patent: 4923387 (1990-05-01), Gellert

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