Method of fabricating tubular composite structures

Details Method of fabricating tubular composite structures Method of fabricating tubular composite structures

1987-12-01

1989-08-01

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including use of vacuum

264257, 264314, 264516, B29C 4310, B29C 4356

Patent

active

048531723

ABSTRACT:
A method of making tubular composite structures that simplifies vacuum bag sealing. The method comprises disposing a prepreg structure within a tool that has at least one hole. The prepreg is disposed adjacent a mandrel. The mandrel comprises an inner bag containing a solid filler core that comprises about 75% to about 95% of the volume of the inner bag. The hole is enclosed with a vacuum bag thereby forming a void space between said vacuum bag and said prepreg. The void space is evacuated. The vacuum bag applies a predetermined pressure to the inner bag thus causing the inner bag to apply a substantially uniform predetermined pressure to the surface of the prepreg. The prepreg is exposed to heat.

REFERENCES:
patent: 2711985 (1955-06-01), Olson
patent: 3135640 (1964-06-01), Kepka
patent: 3962393 (1976-06-01), Blad
patent: 4126659 (1978-11-01), Blad
patent: 4132577 (1979-01-01), Wintermantel
patent: 4202856 (1980-05-01), Frikken
patent: 4634140 (1987-01-01), Stroi
patent: 4704240 (1987-11-01), Reavely et al.

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