Yarn take-up system for weaving and a method of weaving a reinforcing fiber structure for composite material parts

Patent metadata

Field	Value
Publication number	US-2016376734-A1
Application number	US-201615196249-A
Country	US
Kind code	A1
Filing date	Jun 29, 2016
Priority date	Jun 29, 2015
Publication date	Dec 29, 2016
Grant date	—

Abstract

A warp yarn take-up system includes a clamping device for holding a plurality of layers of warp yarns, the clamping device being movable at least in a direction corresponding to the advance direction of the warp yarns. The clamping device includes a bottom clamp, a top clamp, and at least one intermediate clamping element present between the bottom clamp and the top clamp. The bottom clamp, the top clamp, and the at least one intermediate clamping element are held together by clamping.

First claim

1 . A warp yarn take-up system comprising a clamping device for holding a plurality of layers of warp yarns, the clamping device being movable at least in a direction corresponding to an advance direction of the warp yarns, wherein the clamping device comprises a bottom clamp, a top clamp, and at least one intermediate clamping element present between the bottom clamp and the top clamp, and wherein the bottom clamp, the top clamp, and the at least one intermediate clamping element are held together by clamping.

2 . The system according to claim 1 , wherein the bottom clamp, the top clamp, and the at least one intermediate clamping element include one or more portions for coming into contact with the warp yarns during clamping of the clamping device, and wherein each portion is covered in a layer of soft material.

3 . The system according to claim 2 , wherein the soft material is selected from at least of the following materials: elastomer, rubber, silicone, copolymer.

4 . A Jacquard type loom, including a warp yarn take-up system according to claim 1 .

5 . A method of fabricating at least one fiber structure by three-dimensional or multilayer weaving between a plurality of layers of warp yarns interlinked by weft yarns, the method comprising:
clamping warp yarn layers by clamping a clamping device of a warp yarn take-up system in accordance with claim 1 , each intermediate clamping element being inserted between two adjacent layers of the plurality of warp yarn layers so as to separate a fraction of the warp yarn layers in the plurality of warp yarn layers from the remaining layers of the plurality of warp yarn layers in the clamping device; and weaving a first fiber structure upstream from the clamping device, said clamping device being moved in an advance direction of the warp yarns during the weaving.

6 . The method according to claim 5 , wherein a second fiber structure is woven using the same plurality of weft yarn layers as is used in the first fiber structure, a non-woven portion of warp yarns lying between the two fiber structures, and wherein the clamping device is put into place on the non-woven portion.

7 . The method according to claim 6 , wherein the warp yarns situated downstream from the clamping device are cut so as to extract the first fiber structure.

Assignees

• Snecma

Inventors

• Rousseau Claire
• Magnaudeix Dominique Michel Serge
• Hellot Jérémy

Classifications

• D03C3/20 Primary

  Electrically-operated jacquards · CPC title

• D03C3/12

  Multiple-shed jacquards, i.e. jacquards which move warp threads to several different heights, e.g. for weaving pile fabrics · CPC title

• D03C9/02

  Healds · CPC title

• D03D41/004

  Looms for three-dimensional fabrics · CPC title

• D03D49/04

  Control of the tension in warp or cloth · CPC title