Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Including use of vacuum
Patent
1998-01-05
1999-10-19
Davis, Robert
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Including use of vacuum
156285, 156382, 264102, 425389, 4254051, B29C 7044
Patent
active
059684453
ABSTRACT:
A method and apparatus for curing large composite parts. The method utilizes a fiber metal mesh sheet (40) situated against a composite material(34) during a curing process. The fiber metal mesh sheet (40) provides a porous network for flow of the reaction by-products during a curing and vacuuming process, yet gives adequate structure to prevent both mark-off by vacuum ports (52, 70) and crushing of the porous network as a result of autoclave and vacuum pressure. External vacuum ports (52) are located in a bagging film (50) surrounding the composite material (34). Alternatively, vacuum ports (70) are located below the composite material (34). The use of the external vacuum ports (52), vacuum ports (70) located beneath the composite material (34), or both, shortens by-product flow path and provides adequate vacuum pressure over all areas of the composite material (34) to remove reaction by-products.
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McCarville Douglas A.
Taylor David F.
Davis Robert
The Boeing Company
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