Patent ID: 11933194
Assignee: SAFRAN AIRCRAFT ENGINES
Field: Other special machines (Mechanical engineering)
Classification: CPC F  B  Y | IPC B  F

Claim 19:
20. A method for manufacturing a vane according to claim 1, the method comprising the steps of:
a) producing a first fibrous preform, referred to as “spar preform”, by three-dimensional weaving of threads; said preform comprising both a longitudinal end configured to form a vane root and a portion configured to be inserted inside a vane blade;
b) producing a second fibrous preform, referred to as “skin preform”, by three-dimensional weaving or braiding of threads; said skin preform being configured to form an aerodynamic profile;
e) arranging the spar preform inside the skin preform;
f) positioning said preforms in a mould, then injecting a thermosetting resin to obtain the vane;
wherein the method comprises, prior to the steps e) and f), the steps consisting in:
a2) forming in the step a) a plurality of longitudinal stiffeners on said portion of the spar, and delimiting spaces between the stiffeners,
c) producing longitudinal inserts of cellular material, and
d) inserting said inserts into said corresponding spaces of the spar preform.