Woven preform for producing a circumferential or toroidal reinforcement having an omega-shaped cross-section

Patent metadata

Field	Value
Publication number	US-2016376735-A1
Application number	US-201615262029-A
Country	US
Kind code	A1
Filing date	Sep 12, 2016
Priority date	Mar 10, 2014
Publication date	Dec 29, 2016
Grant date	—

Abstract

The disclosure relates to a shape-woven preform which has an omega-shaped cross-section including a core and a sole. At least one part of the core and at least one part of the sole have weft yarns in common with one another.

First claim

What is claimed is:

1 . A preform woven by shape weaving, the preform having an omega-shaped section comprising a core and a sole, wherein at least one portion of said core and at least one portion of said sole comprise weft yarns which cross each other on common warp yarns.

2 . The preform according to claim 1 , wherein the weft yarns of the sole bind warp yarns of lateral portions of the sole to warp yarns of a central portion of the sole, and the weft yarns of the core bind said warp yarns of the lateral portions of the sole to the warp yarns of a central portion of the core.

3 . The preform according to claim 1 , wherein at least a portion of the weft yarns of the sole bind a warp sheet of lateral portions of the sole to warp yarns of a central portion of the core, and another portion of the weft yarns of the sole bind warp sheets of lateral portions of the sole to warp yarns of a central portion of the core.

4 . The preform according to claim 1 , wherein at least a portion of the weft yarns of the sole bind at least one warp sheet of lateral portions of the sole to at least one warp sheet of central portions of the sole, and another portion of weft yarns of the sole bind warp sheets of the sole to warp yarns of a central portion of the core.

5 . The preform according to claim 1 , wherein the core comprises a superposition of fabrics having warp sheets that are at least partially bound therebetween.

6 . The preform according to claim 1 , wherein the sole comprises a superposition of fabrics having warp sheets that are at least partially bound therebetween.

7 . The preform according to claim 1 , wherein the core comprises a superposition of fabrics attached to each other by interlocking of correspondingly shaped fabrics.

8 . The preform according to claim 1 , wherein the sole is formed of two portions separated from each other.

9 . The preform according to claim 8 , wherein the two portions are separated from each other so as to define a slot.

10 . The preform according to claim 1 , wherein the sole is formed of two portions that partially overlap.

11 . The preform according to claim 1 , wherein the core is located in a concave portion of said preform.

12 . The preform according to claim 1 , wherein the core is located on a convex portion of said preform.

13 . The preform claim 1 , wherein weft yarns of said core form an angle different from 90° with at least one portion of warp yarns of said core.

14 . The preform according to claim 1 , wherein at least one of the sole and the core, further comprises a superposition of fabrics attached to each other by draping.

15 . The preform according to claim 14 , wherein at least a portion of the fabrics and the preform are bound by stitchings.

16 . A stiffener obtained by resin impregnation, then baking, of the preform of claim 1 .

17 . A method for manufacturing a preform according to claim 1 , wherein the preform is made by contour weaving on a lap roller having a groove or an outgrowth allowing shape weaving of the core and the sole of the preform.

18 . The manufacturing method according to claim 17 , wherein sides of said preform are tightened in order to reduce a width of the preform, while increasing a winding diameter of said core and said sole.

19 . The manufacturing method according to claim 17 for making a preform having the sole formed of two portions separated from each, wherein the sole is cut at an output of a shuttle loom in order to form a central slot.

20 . The manufacturing method according to claim 17 for making a preform having the sole formed of two portions separated from each, wherein the sole is made by at least two additional lateral warp sheets unbound from weft yarns of the core of the preform, then lateral portions of the core are unpleated to a center of the preform.

21 . A plate for an aircraft nacelle reinforced by at least one stiffener in accordance with claim 16 .

Assignees

• Aircelle Sa

Inventors

• Lorrillard Julien
• Desjoyeaux Bertrand
• ROGNANT Michael
• Provost Benjamin

Classifications

• D03D11/02

  Fabrics formed with pockets, tubes, loops, folds, tucks or flaps (fabrics consisting of a single tube D03D3/02) · CPC title

• B29B11/16

  comprising fillers or reinforcement {(non-woven fabrics per se D04H1/00, D04H3/00)} · CPC title

• D03D49/20

  Take-up motions; Cloth beams · CPC title

• D10B2505/12

  Vehicles (D10B2505/08 takes precedence) · CPC title

• D03D25/005 Primary

  Three-dimensional woven fabrics · CPC title