Process for forming fibrous preform structures

Details Process for forming fibrous preform structures Process for forming fibrous preform structures

1996-10-10

1998-04-21

Calvert, John J.

Textiles: manufacturing

Textile product fabrication or treatment

Fiber entangling and interlocking

28104, 28107, 28111, B32B 506, D04H 146, D04H 310, D04H 502

Patent

active

057405930

ABSTRACT:
The invention relates to the field of needling processes for forming fibrous preform structures. The invention is particularly useful in forming fibrous preform structures suitable for subsequent processing into high temperature resistant composite structures such as carbon/carbon aircraft brake disks. The process according to the invention compensates for fiber pull back induced by fiber resilience, and for compaction in previously needled layers induced during subsequent needling passes. According to a further aspect of the invention, Z-fiber distribution throughout the thickness of the fibrous preform structure may be manipulated as necessary to achieve a desired distribution.

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