Fiber structures and 3d preforms for composite parts

A fiber structure, prefabricated technology, used in textiles and paper, textiles, fabrics, etc.

Active Publication Date: 2022-08-02
PORCHER INDUSTRIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] It is also an object of the present invention to provide a method of producing such preforms that solves the problems of previous methods (e.g. electrostatic powder coating)

Method used

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  • Fiber structures and 3d preforms for composite parts
  • Fiber structures and 3d preforms for composite parts
  • Fiber structures and 3d preforms for composite parts

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0102] figure 1 6 consecutive horizontal planes of the weave of the fiber structure obtained by 3D weaving are shown, in which the weft threads 1 are visible in section and the warp threads 2 are shown longitudinally.

[0103] The fiber structure (on the left of the drawing) consists of 6 layers of weft threads and 12 layers of warp threads. On the right side of the figure, all layers of warp and weft threads are linked. On the left, the two central layers of weft threads are bonded together without warp threads in 7 vertical planes of the weft threads, where this is referred to herein as the debonding zone, ref. 3.

[0104] Fiber volume ratio: 50%.

[0105] Carbon yarn count in warp and weft: 3K

[0106] Thickness of structure (and preform): about 3mm.

[0107] The warp and weft yarns are carbon yarns impregnated with a polyepoxide resin that is approximately 7% by weight of the complete structure. The structure is unfolded and placed in a mold, passed through an oven to...

example 2

[0112] According to the principle of Example 1, it is possible to weave according to figure 2 (Left) Fiber structure comprising a first debonding zone 4 on the left and two debonding zones 5 and 6 on the right. This flat structure (left side of the diagram) can then be deployed in the form of a 3D deployment structure comprising 5 branches (right side of the diagram).

[0113] The warp and weft yarns are carbon yarns impregnated with a polyepoxide resin that is approximately 5% by weight of the complete structure. The structure is unfolded and placed in a mold, passed through an oven to soften the resin, and then cooled to produce a 3D preform. In the same mold or in another mold, the 3D preform will then be infiltrated or infused with the PEEK matrix to form the final part.

example 3

[0115] According to the same principle as Example 1, it is possible to weave according to image 3 (Left) Fibrous structure including central debonding zone 7 . This flat structure (left-hand drawing) can then be deployed in the form of a hollow 3D or hollow tubular structure (right-hand drawing).

[0116] The warp and weft yarns are carbon yarns impregnated with a polyamide resin that is approximately 10% by weight of the complete structure. The structure is unfolded and placed in a mold, passed through an oven to soften the resin, and then cooled to produce a 3D preform. In the same mold or in another mold, the 3D preform will then be infiltrated or infused with the PEEK matrix to form the final part.

[0117] Embodiments of debonding can be varied, for example, by forming the yarns into warps and combining both types of yarns in the same structure.

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Abstract

3D fibrous structure preform comprising at least 3 layers (1, 2) of weft and / or warp yarns, the structure being formed by multi-layer weaving between a plurality of layers of warp yarns and a plurality of layers of weft yarns And woven into a component. It consists of a predetermined distribution of intersections of warp and weft threads bonded by polymers. The weight of the polymer is less than or equal to about 10%. The preform includes at least one thermoformed portion in which the warp and weft yarns are polymer-bonded to their intersections at which at least one of the warp and / or weft yarns carry the polymer.

Description

【Technical field】 [0001] The present invention relates to a fibrous structure and a 3D (3-dimensional) preform obtained from this fibrous structure and for forming substrates for composite parts, in particular for high-tech industries such as aerospace, aerospace and automotive. The invention also relates to a manufacturing method. 【Background technique】 [0002] A composite material with fabric or fiber reinforcement includes at least two components: a matrix and a reinforcement. The matrix that encapsulates and reinforces the reinforcement makes it possible to transmit mechanical stress via its interface. The matrix can also be used to protect the fibrous material from aggressions associated with the application environment (chemical, thermal, UV, etc.). The matrix may or may not be organic. Organic matrices fall into two families: thermoset (TS) and thermoplastic (TP). [0003] The second component is the reinforcement, which must provide the mechanical properties of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B11/16B29K307/04
CPCB29B11/16B29K2307/04D03D25/005B32B5/06B32B7/12
Inventor 让文森·里奇卡多帕特里克·瓦哈尼阿克休伯特·佩兰威廉·杜塞尼
Owner PORCHER INDUSTRIES
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