Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Producing multilayer work or article
Patent
1987-02-17
1988-10-25
Hoag, Willard
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Producing multilayer work or article
264101, 264137, 264258, 264313, B29C 4356
Patent
active
047802626
ABSTRACT:
A flexible rubber boot that transmits molding pressure to the inner surface of the structure to be molded is placed on a support fixture. The boot is held in place by a vacuum applied between the fixture and the boot. Prepregs are laid up on the boot to the desired depth and in a desired configuration. A female mold assembly, consisting of two sections, is then placed over the prepreg material and sealed to the boot. A vacuum is applied to the sealed region between the mold and boot, compressing the material against the interior of the mold that defines the outer surface of the structure. The assembly of boot, mold, and material is then placed in an autoclave. After the material has cured, the finished structure is separated from the mold and boot. The tooling is reusable and the process completed easily, allowing the efficient fabrication of structure having smooth inner and outer surfaces.
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Hammar John C.
Hoag Willard
The Boeing Company
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