METHOD FOR PRODUCING COMPOSITE-MATERIAL STRUCTURES WITH COLLAPSIBLE TOOLING OF INERT MATERIAL

摘要

Method for producing stiffened structures (11), made from composite materials, formed by an exterior covering (13) and a plurality of stiffeners (15) whose cross section has a closed form defining an interior opening (23), which comprises the following steps: a) providing a moulding tool (31); b) providing auxiliary male tools (37), with an inert material in their interior, covered by membranes suitable for curing; c) providing the stiffeners (15) in the uncured or cured state; d) arranging the stiffeners (15) in the moulding tool (31) and the auxiliary male tools (37) in the interior openings (23) thereof; e) laminating the exterior covering (13); f) curing the stiffened structure (11); g) removing the auxiliary male tools (37) after their volume has been reduced, by withdrawing inert material therefrom; h) separating the cured, stiffened structure (11) from the tool (31). The invention also relates to the auxiliary male tools.