Molded resin article and a method for the manufacture thereof

Details Molded resin article and a method for the manufacture thereof Molded resin article and a method for the manufacture thereof

1989-10-20

1991-10-01

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Plural sequential shaping or molding steps on same workpiece

2643287, 425555, 425577, B29C 4533

Patent

active

050531816

ABSTRACT:
A manufacturing method for a molded resin article includes an injection step of injecting a resin molding material into a mold, a compression step of compressing a prescribed portion of the resin molding material, a cooling step of solidifying the resin molding material by cooling while maintaining pressure on the prescribed portion, and a removal step of removing the resulting molded resin article from the mold. The compression prevents the formation of voids in the compressed portion and increases the dielectric strength thereof. In a preferred embodiment, the molded article is a distributor rotor for an internal combustion engine.

REFERENCES:
patent: 2781547 (1957-02-01), Moxness
patent: 4184835 (1980-01-01), Talbot
patent: 4339408 (1982-07-01), Jenkins
patent: 4540534 (1985-09-01), Grendol
patent: 4562317 (1985-12-01), Gerber et al.
patent: 4659533 (1987-04-01), Abramson, Jr.
patent: 4735563 (1988-04-01), Tanaka et al.

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