Method for molding a cover of synthetic resin powder material on

Details Method for molding a cover of synthetic resin powder material on Method for molding a cover of synthetic resin powder material on

1978-03-10

1979-10-23

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Stratified or layered articles

264120, 264127, 264250, D04H 116

Patent

active

041721128

ABSTRACT:
A method for molding a cover on a metal core by preforming cover segments and molding the latter to size with the core interposed therebetween. When molded, the preformed segments are gradually deformed and uniformly compacted to a high density particularly in regions in direct contact with the wall surfaces of the mold, with no inclusion of cracks, pinholes or other structural defects therein. The product molded in this manner exhibits a very high corrosion-resisting characteristic with no machining operation conventionally required thereon, particularly when molded of tetrafluoroethylene resin powder.

REFERENCES:
patent: 3011219 (1961-12-01), Williams
patent: 3223763 (1965-12-01), Keen
patent: 3537700 (1970-11-01), Schenck, Jr. et al.
patent: 3873663 (1975-03-01), Bertolet, Jr.

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