Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1987-06-05
1988-07-12
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
264336, 425438, B29C 4544
Patent
active
047568658
ABSTRACT:
A mold, typically an injection mold, comprises a cavity member and a core member relatively movable between open and closed positions to define a first parting line and a molding chamber between the core and cavity members in the closed position. A sprue aperture is provided, communicating with the molding chamber to provide molding compound to the chamber. In accordance with this invention the cavity member defines forward and rearward portions movable between open and closed positions and proportioned whereby objects molded in the molding chamber can be removed from between the forward and rear portions when the cavity member is in its open position.
REFERENCES:
patent: 4155698 (1979-05-01), Aichinger
patent: 4286766 (1981-09-01), von Holdt
patent: 4362291 (1982-12-01), Fuke et al.
patent: 4378928 (1983-04-01), Kopp et al.
patent: 4502660 (1985-03-01), Luther et al.
patent: 4533312 (1985-08-01), von Holdt
patent: 4541795 (1985-09-01), Cole
patent: 4627810 (1986-12-01), von Holdt
patent: 4648834 (1987-03-01), von Holdt
Ellis Garrettson
Fortenberry J.
Pigott, Jr. Charles F.
Silbaugh Jan H.
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