US 12,221,726 B2
Method for three-dimensional or multilayer weaving of a fibrous structure and fibrous structure having a three-dimensional or multilayer weave
Dominique Marie Christian Coupe, Moissy-Cramayel (FR); Célline Kribs, Moissy-Cramayel (FR); and Adrienne Retiveau-Leca, Moissy-Cramayel (FR)
Assigned to SAFRAN, Paris (FR)
Appl. No. 18/547,543
Filed by SAFRAN, Paris (FR)
PCT Filed Feb. 24, 2022, PCT No. PCT/FR2022/050343
§ 371(c)(1), (2) Date Aug. 23, 2023,
PCT Pub. No. WO2022/184999, PCT Pub. Date Sep. 9, 2022.
Claims priority of application No. 2102053 (FR), filed on Mar. 3, 2021.
Prior Publication US 2024/0133084 A1, Apr. 25, 2024
Prior Publication US 2024/0229307 A9, Jul. 11, 2024
Int. Cl. B29B 11/00 (2006.01); D03D 1/00 (2006.01); D03D 13/00 (2006.01); D03D 25/00 (2006.01); B29B 11/16 (2006.01); D03D 11/00 (2006.01)
CPC D03D 1/00 (2013.01) [D03D 13/004 (2013.01); D03D 25/005 (2013.01); B29B 11/16 (2013.01); D10B 2505/02 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for weaving a fibrous structure intended to form the fibrous reinforcement of a turbomachine blade made of composite material comprising a fibrous reinforcement densified by a matrix, the fibrous structure being woven as a single piece on a loom by three-dimensional or multilayer weaving between a plurality of warp yarn layers and a plurality of weft yarn layers, the fibrous structure comprising a blade root preform, the method comprising at least one first weaving step in which the warp yarns and the weft yarns are woven according to a first type of weave so as to form a first portion of the blade root preform of the fibrous structure, and a second weaving step in which the warp yarns and the weft yarns are woven according to a second type of weave so as to form a second portion of the blade root preform of the fibrous structure continuing on from the first portion and located downstream of the first portion in the direction of advance of the fibrous structure at an outlet of the loom, the warp yarns and the weft yarns having a degree of interweaving in the first type of weave greater than the degree of interweaving of the warp yarns and the weft yarns present in the second type of weave, the degree of interweaving corresponding to a ratio of a number of layers of yarns crossed by the warp yarns or the weft yarns divided by a product of the weave ratio, a spacing between two weft columns and a spacing between two warp columns.