MANUFACTURE OF FIBROUS STRUCTURE HAVING VARIABLE THICKNESS, BY THREE-DIMENSIONAL WEAVING Russian patent published in 2014 - IPC D03D25/00 

FIELD: textiles, paper.

SUBSTANCE: invention relates to the manufacture of the fibrous structure having a variable thickness, by three-dimensional weaving. The fibrous structure is manufactured by three-dimensional laminate weaving with the thickness in a direction perpendicular to the direction (C) of the warp and the direction (T) of weft that varies along the warp direction while maintaining the same number of warp threads involved in weaving in all levels of the fibrous structure along the direction of the warp. Upon transition in the warp direction from the first part of the fibrous structure to the second part of the fibrous structure having a thickness greater than the thickness of the first part, the number of planes of warp is reduced and the number of layers of warp threads is increased with no change in the number of warp threads by forming at least one plane (P1, …) of warp in the second part with the warp threads passing at least from two different planes (P1, P2, …) of warp in the first part.

EFFECT: technical result is to increase locally the weight ratio and/or density of weaving the weft or warp threads, to reduce the ability to decrease in thickness during shaping the fibrous structure obtained by the three-dimensional weaving by means of squeezing.

12 cl, 8 dwg