US 12,337,556 B2
Method for manufacturing a composite material part having a cellular structure and corresponding part
Nicolas Pierre Lanfant, Moissy-Cramayel (FR); and Patrick Dunleavy, Moissy-Cramayel (FR)
Assigned to SAFRAN, Paris (FR)
Appl. No. 18/245,199
Filed by SAFRAN, Paris (FR)
PCT Filed Sep. 9, 2021, PCT No. PCT/FR2021/051544
§ 371(c)(1), (2) Date Mar. 14, 2023,
PCT Pub. No. WO2022/058673, PCT Pub. Date Mar. 24, 2022.
Claims priority of application No. 2009424 (FR), filed on Sep. 17, 2020.
Prior Publication US 2023/0364868 A1, Nov. 16, 2023
Int. Cl. B29C 70/70 (2006.01); B29C 70/22 (2006.01); B29C 70/46 (2006.01); B29K 105/08 (2006.01); F02K 1/54 (2006.01); B29L 31/00 (2006.01)
CPC B29C 70/70 (2013.01) [B29C 70/222 (2013.01); B29C 70/462 (2013.01); F02K 1/54 (2013.01); B29K 2105/0827 (2013.01); B29L 2031/7504 (2013.01); F05D 2230/20 (2013.01); F05D 2300/603 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for manufacturing a part made of composite material comprising a cellular structure for a turbomachine, the cellular structure comprising at least one cell delimited by walls and the method comprising the steps of:
supplying at least one first core,
providing a lap of a first fibrous reinforcement comprising a plurality of discontinuous long fibers randomly distributed in a plane,
producing at least one strip of the first fibrous reinforcement,
producing a second fibrous reinforcement in a form of a continuous braided sock and obtained by braiding, the second fibrous reinforcement comprising continuous long fibers, inserting the at least one first core into the sock,
draping the at least one strip of the first fibrous reinforcement around the sock containing the at least one first core,
placing an assembly formed by the sock containing the at least one first core and the at least one strip draped around the sock in a mold,
thermocompressing the assembly installed in the mold, and
demolding of the thermocompressed assembly by removing the at least one first core and leaving the cell in place of the at least one first core.