Metal mold for injection molding tubular or columnar products an

Details Metal mold for injection molding tubular or columnar products an Metal mold for injection molding tubular or columnar products an

1989-04-05

1990-11-27

Seidleck, James

Plastic article or earthenware shaping or treating: apparatus

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

With coupling between charger and mold

249105, 249144, 425577, B29C 4503

Patent

active

049732420

ABSTRACT:
A metal mold for injection molding tubular or columnar products is provided in which those portions of matching surfaces of the metal mold members close to end portions of an annular or cylindrical cavity are provided with grooves extending continuously or intermittently so as to surround the cavity's end portions.

REFERENCES:
patent: 4101699 (1978-07-01), Stine et al.
patent: 4126291 (1978-11-01), Gilbert et al.
patent: 4483891 (1984-11-01), Cerny
patent: 4707389 (1987-11-01), Ward
patent: 4787596 (1988-11-01), Folding et al.

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