Method for preparing preforms for molding processes

Details Method for preparing preforms for molding processes Method for preparing preforms for molding processes

1989-09-28

1991-02-12

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With printing or coating of workpiece

Coating or impregnating workpiece before molding or shaping...

264137, 264258, 264324, B29C 4320, B29C 4120

Patent

active

049922289

ABSTRACT:
Preforms for molding processes such as resin transfer molding processes are prepared by melting a solid, non-sintering, thermoplastic-like resinous compound on the surface of a substrate material; after cooling, assembling one or more plies of the coated substrate material into the desired shape; heating the thus shaped substrate material to a temperature above the melting temperature of resinous compound and subsequently cooling to a temperature below the melting point of the resinous compound.

REFERENCES:
patent: 3922418 (1975-11-01), Lauchenauer
patent: 4213930 (1980-07-01), Goodrich et al.
patent: 4325770 (1982-04-01), Korpman
patent: 4329387 (1982-05-01), Goodrich et al.
patent: 4496415 (1985-01-01), Sprengling
Whittington's Dictionary of Plastics; Lloyd Wittington, first edition, 1968 p. 220.

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