METHOD FOR MANUFACTURING A BLADE WITH INTERNAL CHANNELS FROM COMPOSITE MATERIAL AND TURBO MACHINE BLADE FROM COMPOSITE MATERIAL

摘要

1. A method of manufacturing a blade (10) of a turbomachine from a composite material containing a fibrous reinforcement part, sealed with a matrix, according to which: - a fibrous preform (100) is made by interlacing the first plurality of fibers and the second plurality of fibers; wherein the fibers of the plurality of fibers are arranged in successive layers C11, C12, C13) and are elongated in the longitudinal direction of the fiber preform corresponding to the longitudinal direction of the manufactured blade (10); - give the fiber preform (100) a predetermined shape to obtain a preformed preform (200) of the fabricated blade (10); - preformed preform (200) is compacted by impregnating it with a liquid composition containing a precursor of the matrix material to obtain a blade (10) containing a fiber part l hardening, which is formed by said preformed preform and sealed with a matrix, characterized in that at least one layer (C12) of the first plurality of fibers located in the inner part of the fiber preform contains one or many fibers made of material having fugitive properties (Fc1, Fc2, Fc3), and after compaction of the preformed billet (200), one or many fibers made of a material having fugitive properties (Fc1, Fc2, Fc3) are removed for images Nia blade in one or a plurality of internal channels (21, 22, 23) .2. The method according to claim 1, characterized in that at least one of the following materials is used as a material having fugitive properties: - a hot-melt material; - a material that can be