Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Producing multilayer work or article
Patent
1992-12-17
1994-06-21
Timm, Catherine
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Producing multilayer work or article
264316, 425388, 425390, B29C 5110, B29C 5128
Patent
active
053226615
ABSTRACT:
A method and apparatus of molding articles from composite materials are disclosed in which a stack of prepregs are placed on a first forming surface of a former, which forming surface has a surface configuration matching that of one side of the composite article, placing a semi-rigid molding shelf onto the former such that a second forming surface of the molding shell, which matches the surface configuration of an opposite side of the composite article, bears against the stack of prepregs and urging the molding shell towards the former, thereby compressing the plies of prepregs by drawing a vacuum between an impermeable membrane covering the molding shell and the former. The assembly of the former, the molding shell, the stack of prepregs and the impermeable membrane are placed in an autoclave such that it may be heated while the vacuum is drawn between the membrane and the former to compress the stack of plies of prepregs.
REFERENCES:
patent: 4062917 (1977-12-01), Hill et al.
patent: 4267142 (1981-05-01), Lankheet
patent: 4562033 (1985-12-01), Johnson et al.
patent: 4608220 (1986-08-01), Caldwell et al.
patent: 4683018 (1987-07-01), Sutcliffe et al.
patent: 4824631 (1989-04-01), Yeager
Societe Nationale d'Etude et de Construction de Moteurs d'Aviati
Timm Catherine
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