Patent ID: 9358731
Filing Date: 2016-06-07
CPC Classification: B29B,B29C,B29K,Y10T

Claim Text:
1. A method for making a preform for a composite with a thermoplastic matrix, said preform comprising a plurality of layers of reinforcement fibers alternating with a plurality of layers of thermoplastic resin, each of the alternating layers sewn according to a Tailored Fiber Placement (TFP) process, characterized in that the method comprises 1) depositing a first layer consisting of reinforcement fibers onto a support; 2) sewing a first attachment yarn across the first layer of reinforcement fibers and onto the support in a zig-zag pattern; 3) depositing a first layer of thermoplastic resin consisting of thermoplastic yarns onto the first layer of reinforcement fibers; 4) sewing a second attachment yarn across the thermoplastic yarns of the first layer of thermoplastic resin and across the first layer of reinforcement fibers and onto the support in a zigzag pattern; 5) repeating steps 1)-4) beginning by depositing a second layer consisting of reinforcement fibers onto the first layer of thermoplastic resin.