Process for producing an atmosphere for the manufacture of high

Details Process for producing an atmosphere for the manufacture of high Process for producing an atmosphere for the manufacture of high

1990-02-12

1992-06-16

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Utilizing special inert gaseous atmosphere or flushing mold...

264511, 264546, 264553, 264571, 264258, 425389, B29C 4320, B29C 4356

Patent

active

051223180

ABSTRACT:
Process for producing an atmosphere for the manufacture of high performance composite parts, of the type wherein the atmosphere is used in an autoclave above a superposition of cutouts with fibrous structure impregnated with a thermosetting organic material disposed between a lower mold and an upper sealing covering member, the space between the covering member and the mold being under vacuum. The atmosphere is nitrogen gas prepared from raw nitrogen by separation from air through permeation or adsorption, incorporating a residual content of oxygen between 0.5% and 6%, with a low content of water vapor. Application for example to the manufacture of secondary and primary structures in aeronautical and space construction.

REFERENCES:
patent: 4254070 (1981-03-01), Yodogawa et al.
patent: 4255371 (1981-03-01), Shimoyashiki et al.
patent: 4348213 (1982-09-01), Armond
patent: 4382052 (1983-05-01), Arimatsu
patent: 4494966 (1985-01-01), Umeki
patent: 4560523 (1985-12-01), Plumley et al.
patent: 4681718 (1987-07-01), Oldham
patent: 4986870 (1991-01-01), Frohlich
"Development of a Pilot Autoclave for Polymeric Diaphragm Forming of Continuous Fibre-Reinforced Thermoplastics", Composites, vol. 19, No. 1, Jan. 1988, By P. Mallon et al, pp.3 7-47.

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