Method for manufacturing a composite preform for the manufacture of a composite panel with double curvature geometry

Patent metadata

Field	Value
Publication number	US-12179918-B2
Application number	US-202117188482-A
Country	US
Kind code	B2
Filing date	Mar 1, 2021
Priority date	Aug 27, 2018
Publication date	Dec 31, 2024
Grant date	Dec 31, 2024

Abstract

A method for manufacturing a preform for producing a part made of composite material with an unchangeable final shape includes supplying a triaxial non-woven textile comprising a layer of fibers orientated in a first direction, a layer of fibers orientated in a second direction, a layer of fibers orientated in a third direction, and seams extending parallel to each other and forming sheaths for the circumferential fibers, arranging the textile on an element of unchangeable shape by placing the seams parallel to the circumferential direction of the element, and sliding the circumferential fibers into the sheaths so that the textile is in continuous contact with the element.

First claim

What is claimed is:

1. A manufacturing method for manufacturing a preform for the manufacture of a part made of a composite material of a revolution or quasi-revolution non-developable final shape type, having a longitudinal axis, the manufacturing method comprising:
a) providing a tri-axial non-woven fabric comprising:
a first layer comprising circumferential fibers oriented in a first direction,
a second layer comprising fibers, oriented in a second direction,
a third layer comprising fibers, oriented in a third direction, and
seams binding the fibers of the first layer, the second layer and third layer, the seams extending parallel to each other and forming sheaths for the circumferential fibers,

b) disposing the tri-axial non-woven fabric on or in a non-developable shape element, either identical to a non-developable final shape, or of reduced dimensions compared to the non-developable final shape, by placing the seams parallel to a circumferential direction of the non-developable shape element, and
c) sliding the circumferential fibers in the sheaths formed by the seams, so that the tri-axial non-woven fabric is in continuous contact with the non-developable shape element and is adapted to a non-developable shape of the non-developable shape element to manufacture the preform.

2. The manufacturing method according to claim 1 , wherein c) is carried out by tensioning the circumferential fibers, so as to slide the circumferential fibers in the sheaths formed by the seams and unraveling the fibers of the second layer and the third layer.

3. The manufacturing method according to claim 1 , wherein a pressure is produced on the tri-axial non-woven fabric in the direction of the non-developable shape element, by a bar.

4. The manufacturing method according to claim 1 , wherein during c) the fibers of the second layer and the third layer are put in tension.

5. The manufacturing method according to claim 1 , wherein the non-developable shape element is a convex shape element.

6. The manufacturing method according to claim 1 , wherein the non-developable shape element is a concave shape element.

7. The manufacturing method according to claim 1 , wherein the non-developable shape element has a reduced circumference with respect to the part of the non-developable final shape.

8. The manufacturing method according to claim 1 , wherein the non-developable shape element has a circumference identical to the part of the non-developable final shape.

Assignees

• Safran Nacelles

Inventors

• Desjoyeaux Bertrand Leon Marie
• Lorrillard Julien
• Provost Benjamin

Classifications

• D06C3/00

  Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics (shaping or stretching tubular fabrics upon cores or internal frames D06C5/00) · CPC title

• B32B5/26

  another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)} · CPC title

• B32B5/073

  characterised by the fibrous or filamentary layer being mechanically connected to another layer by sewing, stitching, hook-and-loop fastening or stitchbonding · CPC title

• D04H3/115

  by applying or inserting filamentary binding elements · CPC title

• D04H3/10

  with bonds between yarns or filaments made mechanically · CPC title