Runner shut-off for an injection molding system

Details Runner shut-off for an injection molding system Runner shut-off for an injection molding system

1991-10-03

1993-05-04

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

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

With coupling between charger and mold

26432812, 425577, 425588, B29C 4532

Patent

active

052080536

ABSTRACT:
A runner shut-off for an injection molding system press fit into a blind bore formed in one of the mold plates. The bore cuts through one of the runners that supplies material to the mold cavities. The runner shut-off includes a casing and a core pin rotatably received in the casing. The core pin is movable to a number of discrete rotated positions with respect to the casing. Slots are formed in the casing and the core pin to join the runners cut by the bore when the core pin is rotated to a position allowing flow of material.

REFERENCES:
patent: 3819313 (1974-06-01), Josephsen et al.
patent: 4242073 (1980-12-01), Tsuchiya et al.
patent: 4337027 (1982-06-01), Montieth
patent: 4708314 (1987-11-01), Kuhling
patent: 4909725 (1990-03-01), Ward

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