Patent ID: 11959440
Assignee: SAFRAN CERAMICS
Field: Surface technology, coating (Chemistry)
Classification: CPC B  F  Y | IPC F

Claim 9:
10. Method for producing an annular or semi-annular acoustic attenuation structure made of composite material, according to claim 1, comprising:
producing an acoustic attenuation structure fibrous preform comprising a first part intended to form the inner skin, a second part intended to form the outer skin and a third part intended to form the partitions, and
densifying the fibrous preform by the matrix,
wherein the first part or the second part of the acoustic attenuation structure fibrous preform includes the at least one fibrous layer extending over the length of the acoustic attenuation structure and wherein the third part of the acoustic attenuation structure fibrous preform is formed with the first portion of said one or several fibrous layers extending in the radial direction, the second portion of said one or several fibrous layers extending in the axial direction layered on said first part or second part of the acoustic attenuation structure.