Insert-type rotary core mold apparatus

Details Insert-type rotary core mold apparatus Insert-type rotary core mold apparatus

1989-05-03

1990-09-25

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

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

Mold having movable core or movable pin

249 59, 425418, 425422, 425438, B29C 4538

Patent

active

049590073

ABSTRACT:
One of two mold halves to be clamped is composed of an insert holder, an insert mounted detachably on the insert holder, and a rotary core supported rotatably by the insert and having a threaded portion formed on an outer peripheral surface thereof. When clamping is effected, the rotary core is caused to project into a cavity formed in the other mold half, and moldings are injection molded inside the cavity around the rotary core. The insert holder is provided with a driving source such as a motor-driven gear, while the insert is provided with a rotation transmitting mechanism composed of such as gears for rotating the rotary core. If the insert is mounted in the insert holder, the driving source provided in the insert holder is coupled with the rotation driving mechanism provided in the insert, rotating the rotary core and making it possible to remove the moldings having a thread formed on an inner surface thereof from the rotary core by rotating the rotary core. When the type of molding is to be changed, it suffices if the rotary core and the insert are replaced, allowing the mold replacing time to be reduced appreciably and the cost of producing the mold can be lowered substantially.

REFERENCES:
patent: 2339443 (1944-01-01), Wilson
patent: 2457336 (1948-12-01), Wilson
patent: 2799049 (1957-07-01), Wilson
patent: 3718419 (1973-02-01), Adamo
patent: 4090631 (1978-05-01), Grussen
patent: 4139176 (1979-02-01), Wundsch

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