Method of forming composite prepreg articles utilizing heat-shri

Details Method of forming composite prepreg articles utilizing heat-shri Method of forming composite prepreg articles utilizing heat-shri

1990-01-11

1991-12-31

Simmons, David A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 84, 156155, 156161, 156165, 156184, 156189, 156191, B32B 3100

Patent

active

050768719

ABSTRACT:
A method of forming composite prepreg articles. Prepreg plies (12) are laid up over a breakable mandrel (10), the mandrel having a configuration substantially matching the desired configuration of the composite prepreg article and being pre-coated to prevent the prepreg from sticking to it. A release film (14) is applied over the prepreg. A heat-shrinkable braided sleeve (16) is placed over the prepreg and release film and secured to the mandrel, thereby creating an assembly (28). The prepreg is first compacted by encapsulating the assembly and applying a vacuum, and is then substantially cured by exposing the assembly to heat. After curing, the braided sleeve and release film are removed. The cured prepreg, which serves as the desired composite prepreg article, is separated from the mandrel by breaking the mandrel.

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