Resin transfer molding method

Details Resin transfer molding method Resin transfer molding method

1989-10-30

1991-08-20

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264517, 264112, 264257, B29C 4514

Patent

active

050412604

ABSTRACT:
A resin transfer molding preform is disclosed comprising a formation of fiber reinforcement material and a web in direct contact with the formation and encapsulating at least a portion thereof, i.e., the web secured or fixed to the fiber reinforcement material mechanically or by adhesion, etc. A method of making certain of the resin transfer molding preforms of the invention comprises spraying random chopped fiber reinforcement material onto a forming member while drawing a vacuum through the forming member, applying a web over at least a portion of the fiber formation while it remains on the forming member, and compressing the fiber reinforcement material under the web to reduce the loft thereof. Also disclosed is a resin transfer molding process employing a preform according to the invention.

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