Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1978-02-13
1980-05-06
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264102, 264328, 264 406, 264DIG14, 264DIG65, 264DIG83, 425547, 425552, 425812, 425144, 425817R, B29D 2700, B29F 108
Patent
active
042017424
ABSTRACT:
This invention substantially improves the surface finish on resin filled foamed molded plastic products manufactured by injection molding by pre-heating the skin surface of that part of the mold in contact with the part prior to the injection cycle of the machine and then subsequently chilling the mold via internal tube connections to shorten the time needed in the manufacturing cycle for solidifying the part sufficiently for release from the mold.
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Weir, Clifford L. "New Foam Molding Process Offers New Product Versatility" in Modern Plastics Mar., 1969, pp. 68-70;72. _
Throne, James L. "Gate and Vent Design for Structural Foam Molds" in Plastics Design & Processing Jun., 1977, pp. 31-37. _
Anderson Philip
Bower James H.
Ex-Cell-O Corporation
Risko Frank D.
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