Method of manufacturing carbon fiber reinforced carbon composite

Details Method of manufacturing carbon fiber reinforced carbon composite Method of manufacturing carbon fiber reinforced carbon composite

1997-03-12

1998-08-11

Fiorilla, Christopher A.

Plastic and nonmetallic article shaping or treating: processes

With twining, plying, braiding, or textile fabric formation

264 291, 264 297, 264138, 156148, 156149, 427128, 427130, 427180, 427228, B29D 2800, B29C 3702

Patent

active

057924023

ABSTRACT:
A method for forming a carbon composite valve for internal combustion engines. The process includes the steps of braiding carbon fiber into a rope thereby forming a cylindrically shaped valve stem portion and continuing to braid said fiber while introducing into the braiding carbon fiber rope a carbon matrix plug having an outer surface in a net shape of a valve head thereby forming a valve head portion, said carbon matrix plug acting as a mandrel over which said carbon fiber rope is braided, said carbon fiber rope and carbon matrix plug forming a valve head portion suitable for mating with a valve seat; cutting said braided carbon valve stem portion at one end to form a valve tip and cutting said braided carbon fiber after said valve head portion to form a valve face and thus provide a composite valve preform; and densifying said preform by embedding the braided carbon in a matrix of carbon to convert said valve stem portion to a valve stem and said valve head portion to a valve head thereby providing said composite valve.

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