Patent ID: 9545780
Date: 2017-01-17
CPC Classifications: B29C,B29D,B32B,Y10T

Claim:
1. A method for producing a part made of composite material, said part comprising a skin and at least one stiffener joined to said skin, said skin being formed from at least one first strip and said at least one stiffener being formed from at least one second strip, each first and second strip being formed by at least one ply of fibers impregnated with a non-polymerized resin, said method comprising the steps of: producing a preform of the part by pulling the at least one first strip and the at least one second strip in a longitudinal direction X through a die for shaping and positioning the skin and the at least one stiffener, at least one first and at least one second strips being placed in contact, and a polymerization core being introduced between a first strip and a second strip in contact before their passage through the die, and; pressing the preform obtained in a heating press for a duration dt so as to form the skin and the at least one stiffener joined to the skin, a pressure P and a temperature T for polymerizing the resin of the first and second strips being applied to said preform in said heating press over a press length L, the press length L being considered in the longitudinal direction X of the preform and being shorter than a length of the panel; wherein said polymerization core is inflatable; wherein a part of said core situated in the press is inflated with a pressure Pa greater than atmospheric pressure when the pressure P is applied to the preform.