Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – By fluid pressure actuated flexible diaphragm
Patent
1990-12-21
1992-07-21
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
By fluid pressure actuated flexible diaphragm
425403, 4254052, 425417, 425419, 249 65, 249179, 156224, 156292, 156245, 156285, 264257, 264510, 264313, 264314, 264219, B29C 4516
Patent
active
051318342
ABSTRACT:
An isostatic pressurizing bag for consolidating a composite part has an outer flexible elastomer having a fixed resilient outside surface. The outer elastomer surrounds a closed chamber. A thermally expandable inner elastomer is located in the closed chamber. The inner elastomer is selected as an elastomer that can viscously flow or move in response to pressure. The outer elastomer is capable of flexure to relieve expansion of the inner elastomer. The bag is formed by curing plies of uncured silicone rubber around either a silicone gel or a particulated silicone rubber that is capable of phase change to a flowable gel in response to pressure. In use a composite prepreg is overlaid on a surface that defines the shape of a desired part. The isostatic pressurizing bag is located over the prepreg trapping the prepreg between the pressurizing bag and the surface. The composite prepreg is heated to its cure temperature while simultaneously applying heat and pressure to the isostatic pressurizing bag to consolidate the prepreg between the surface and the isostatic pressurizing bag.
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Anderson Terry J.
Block Robert B.
Durkin II Jeremiah F.
Northrop Corporation
Woo Jay H.
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