Weaving device for making a structure for a composite article

摘要

The composite fabric weaving has a longitudinal cam to move the warps, and a structured weft insertion system. The assembly for weaving a composite material has a system (5) to give different displacement movement speeds to the warps (FC) which rotates round a longitudinal axis (X-X). Its profile is set as a function of at least one lateral edge of the woven material, in a cam shape. The cam (5) has a flat surface and a profile which is defined by a variable lateral width, at right angles to the axis (X-X), where the axis is generally orthogonal to the direction (D) of the warps (FC). The cam profile is defined so that the lateral width (hi) is at a point (Pi) along the axis (X-X) to meet the equation: Li= n(Pj)+F1(hi,θ2) - F2(hi,θ1) where: Li is the required length of the warp in the woven fabric at the point (Pi) on the longitudinal axis (X-X); n is the number of wefts in the fabric; n Pj is the displacement of the warps in each step; F1 and F2 are the distance functions of the lateral width (hi) and the extreme rotation angles (θ1,θ2) of the cam. The weft insertion system gives a variable number of superimposed wefts of different weft thicknesses. The length of warp displacement, with longitudinal displacement by steps for the insertion of the wefts, is set for each step.