Apparatus for molding a plate

Details Apparatus for molding a plate Apparatus for molding a plate

2005-02-15

2005-02-15

Utech, Benjamin L. (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

Opposed registering coacting female molds

C425S125000, C425S388000, C425S395000, C425S407000

Reexamination Certificate

active

06854964

ABSTRACT:
A method and apparatus for molding a plate having highly detailed surface features from a thermosetting resin with a high concentration of a filler such as graphite. The method an apparatus provides for the formation of a preform of casting material and the placement of the material in a cavity mold which is precisely temperature controlled, has vacuum assist operating throughout the molding operation. The molding pressure is rapidly increased to flow the material through the molding cavity prior to the onset of curing and uniquely positioned ejector pins are provided for removal of the molded plate without damage to the detailed surface features.

REFERENCES:
patent: 4751029 (1988-06-01), Swanson
patent: 5507633 (1996-04-01), Osada et al.
patent: 5614312 (1997-03-01), Tucker et al.
patent: 5820801 (1998-10-01), Greve
patent: 5858569 (1999-01-01), Meacher et al.
patent: 5945232 (1999-08-01), Ernst et al.
patent: 5981098 (1999-11-01), Vitale
patent: 6015633 (2000-01-01), Carlstrom, Jr. et al.
patent: 6071635 (2000-06-01), Carlstrom, Jr.

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