Method of releasing thin discs in molding

Details Method of releasing thin discs in molding Method of releasing thin discs in molding

1998-08-28

1999-12-07

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Making hole or aperture in article

264 133, 264154, 264161, B29C 4544

Patent

active

059977884

ABSTRACT:
A method of releasing thin discs during molding forms discs with a central aperture with a thin gate connecting the molded disc to a sprue. A male cutter advances under pressure control of an actuator operating the male cutter and implements releasing of the molded discs from the surfaces of a stamper and a mirror plate during mold closing. The molded disc and the sprue are ejected by a center pin in the mold opening operation.

REFERENCES:
patent: 4260360 (1981-04-01), Holmes et al.
patent: 4372741 (1983-02-01), Cane et al.
patent: 4880587 (1989-11-01), Fichlseder et al.
patent: 5690974 (1997-11-01), Miyairi
patent: 5720994 (1998-02-01), Asai

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