Process for manufacturing composite material structures with...

Details Process for manufacturing composite material structures with... Process for manufacturing composite material structures with...

2011-07-05

2011-07-05

Goff, II, John L (Department: 1746)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S155000, C156S210000

Reexamination Certificate

active

07972466

ABSTRACT:
A process for manufacturing stiffened structures (11) in composite materials formed by an outer coating (13) and a plurality of stiffeners (15) the cross-section of which has a closed form delimiting an inner opening (23), comprising the following steps: a) Providing a shaping tool (31); b) Providing auxiliary male tools (37) with an inert material inside them coated with membranes suitable for curing c) Providing stiffeners (15) in fresh or cured condition; d) Arranging the stiffeners (15) in the tool (31) and the auxiliary male tools (37) in their inner openings (23); e) Laminating the outer coating (13); f) Curing the stiffened structure (11) with high temperature and pressure; g) Removing the auxiliary male tools (37) after reducing their volume by withdrawing the inert material thereof; h) Separating the cured stiffened structure (11) from the tool (31). The invention also relates to the auxiliary male tools.

REFERENCES:
patent: 2454719 (1948-11-01), Scogland
patent: 4681724 (1987-07-01), Faiz et al.
patent: 4946526 (1990-08-01), Petty-Galis et al.
patent: 5170967 (1992-12-01), Hamamoto et al.
patent: 6746642 (2004-06-01), Buge et al.

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