Methods and systems for forming a fibrous preform

Patent metadata

Field	Value
Publication number	US-2017268141-A1
Application number	US-201615070253-A
Country	US
Kind code	A1
Filing date	Mar 15, 2016
Priority date	Mar 15, 2016
Publication date	Sep 21, 2017
Grant date	—

Abstract

Systems and methods for forming a fibrous preform are disclosed. The method may comprise providing a plurality of needles comprising a barbed needle and a barbless needle and penetrating the fibrous preform with the plurality of needles.

First claim

What is claimed is:

1 . A method of forming a fibrous preform, comprising:
providing a plurality of needles comprising a barbed needle and a barbless needle; and penetrating the fibrous preform with the plurality of needles, wherein the plurality of needles comprises approximately 50% a plurality of the barbed needles and approximately 50% a plurality of the barbless needles.

2 . The method of claim 1 , wherein the penetrating the fibrous preform with the plurality of needles comprises penetrating with the barbed needle having at least one of a high angle barb or a high barb density.

3 . The method of claim 1 , wherein the penetrating the fibrous preform with the plurality of needles comprises penetrating with the barbed needle having three barbed edges.

4 . The method of claim 3 , wherein the penetrating the fibrous preform with the plurality of needles comprises penetrating with the barbed needle having three barbs on each of the three barbed edges.

5 . The method of claim 4 , wherein the three barbs on each of the three barbed edges are high angle barbs.

6 . The method of claim 1 , wherein the penetrating the fibrous preform with the plurality of needles comprises penetrating with the barbless needle having a needle tip, the needle tip comprising a tamp surface.

7 . The method of claim 1 , wherein the penetrating the fibrous preform with the plurality of needles comprises penetrating with the barbless needle having a barbless needle length that is shorter than a barbed needle length.

8 . The method of claim 1 , wherein the penetrating the fibrous preform with the plurality of needles comprises penetrating with the barbed needle having at least one of a low angle barb or a low barb density.

9 . The method of claim 1 , wherein the penetrating the fibrous preform with the plurality of needles comprises penetrating with the barbed needle having four barbed sides.

10 . The method of claim 9 , wherein the barbed needle comprises a low angle barb on each of the four barbed sides.

11 . (canceled)

12 . The method of claim 1 , wherein the approximately 50% of the plurality of the barbed needle comprises a first approximately 50% of each barbed needle having a high barb density and a second approximately 50% of each barbed needle having a low barb density.

13 . The method of claim 1 , wherein the approximately 50% of the plurality of the barbed needle comprises a first approximately 50% of each barbed needle having a high angle barb and a second approximately 50% of each barbed needle having a low angle barb.

14 . A fibrous preform needling system for a fibrous preform having a fibrous layer, comprising:
a needling board; and a plurality of needles coupled to the needling board, the plurality of needles comprising a barbed needle and a barbless needle, wherein the plurality of needles is configured to penetrate a fibrous preform, and wherein the plurality of needles comprises approximately 50% a plurality of the barbed needles and approximately 50% a plurality of the barbless needles.

15 . (canceled)

16 . The fibrous preform needling system of claim 14 , wherein the approximately 50% of the plurality of the barbed needle comprises a first approximately 50% of each barbed needle having a high barb density and a second approximately 50% of each barbed needle having a low barb density.

17 . The fibrous preform needling system of claim 14 , wherein the barbless needle has a barbless needle length that is shorter than a barbed needle length.

18 . The fibrous preform needling system of claim 14 , wherein the barbless needle comprises a tamp surface.

19 . A method of forming a fibrous preform, comprising:
coupling a plurality of barbed needles to a needling board; coupling a plurality of barbless needles to the needling board, wherein a location of the barbless needles alternate axially and laterally with a location of the barbed needles; and applying the needling board to the fibrous preform, the fibrous preform comprising a fibrous layer, wherein a plurality of needles, comprising the plurality of barbed needles and the plurality of barbless needles, comprises approximately 50% barbed needles and approximately 50% barbless needles.

20 . (canceled)

Assignees

• Goodrich Corp

Inventors

• Sheehan Philip
• Martinez Iii Modesto
• Vaidyaraman Sundararaman

Classifications

• F16D65/126

  the material being of low mechanical strength, e.g. carbon, beryllium; Torque transmitting members therefor · CPC title

• D04H1/46 Primary

  by needling or like operations to cause entanglement of fibres (D04H1/45 takes precedence; needling machines D04H18/00) · CPC title

• D04H18/02 Primary

  with needles · CPC title

• D04H3/002

  Inorganic yarns or filaments · CPC title

• D04H3/105

  by needling (needling machines D04H18/00) · CPC title