Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Producing multilayer work or article
Patent
1984-12-20
1986-08-26
Silbaugh, Jan
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Producing multilayer work or article
264512, 264552, 264258, 264294, 264314, 264316, 4253421, 425347, 425389, B29C 4310, B29C 4314, B29C 4320
Patent
active
046082204
ABSTRACT:
Improvements in manufacturing composite material articles. The use of male molds in forming such articles has the problem of requiring large tolerances for the outer dimensions of the articles. The use of female molds has the problem of inaccurate forming of highly contoured inner surfaces. The invention produces an accurately formed inner surface by molding material against a male mold, and outer dimensions within close tolerances by curing the material in a female mold. A male caul (34) is positioned on a male mold (30). A preplied stack (32) of composite material is supported on a blanket (36) and held in position against caul (34) with caul (34) and mold (30) in an inverted position. Stack (32) is heated. A vacuum causes blanket (36) to mold stack (32) against caul (34). Mold (30) is rotated 180.degree., and stack (32) is allowed to cool. A female mold surface (43) is placed into contact with formed stack (32). Male mold (30) is moved away, leaving caul (34 ) and formed stack (32) in female mold (42). Stack (32) is cured in female mold (42), preferably by a vacuum bagging operation.
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Caldwell John E.
Chapman Michael R.
Goodwin Kenneth J.
Lowery Patrick A.
Pauly Joan H.
Silbaugh Jan
The Boeing Company
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