Patent ID: 6045729
Filing Date: 2000-04-04
Classification: B29C,D04H

Abstract:
A method of manufacturing a fibrous structure (1) for a composite fiber-matrix material part, comprising:(a) providing a fibrous, flexible and porous blank (8) of a fibrous part (3) representing a part of said fibrous structure (1);(b) placing said porous blank (8) in an open mold (14), the shape of the imprint of which corresponds at least approximately to the outside surface (35) of a part of said fibrous part (3) and said blank (8) is attached to said mold (14), and then impregnating said blank (8) with a freezeable liquid;(c) cooling said blank (8) impregnated in this way with freezeable liquid to freeze said freezeable liquid impregnating said blank and consequently to stiffen said blank;(d) machining (at 18) said blank (8) stiffened in this way at least partly to the required shape for said fibrous part (3);(e) after thawing said liquid impregnating said machined blank, eliminating said liquid to obtain said fibrous part; and(f) attaching said machined fibrous part (3), remaining attached to said fibrous mold (14), to at least one additional fibrous part (2) to form said fibrous structure (1).