Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1993-06-14
1995-06-06
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
26432814, 264334, 425556, 425DIG51, B29C 4527
Patent
active
054220599
ABSTRACT:
A method and apparatus for injection molding a plastic part using a film gate. The film gate is constructed of a pair of tenon members which retract into a mortise tooled into a mold section. Because the tenon members extend to release the dross formed in the runner, the film gate may be placed in the center of the mold section to decrease the pressure gradient in the curing plastic and to allow the gate to be located where aesthetic aberrations, from the removal of the dross, will not be a problem in the finished article.
REFERENCES:
patent: 3575233 (1971-04-01), Mahle
patent: 4206799 (1980-06-01), McDonald
patent: 4548574 (1985-10-01), Badalamenti
patent: 4576568 (1986-03-01), Grannen, III
patent: 4620958 (1986-11-01), Wiechard
patent: 4998874 (1991-03-01), Stocchiero
Heitbrink Jill L.
Herink Kent A.
Laurenzo Brian J.
Trout Brett J.
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