Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Large thin-wall carbon fiber needling prefabricated body and preparation method thereof

A carbon fiber preform and carbon fiber technology, applied in the field of composite materials, can solve the problems of difficult to ensure dimensional accuracy and parallelism, reduce overall performance and stability, increase production costs, etc., to ensure process stability and preparation efficiency, improve uneven distribution

Inactive Publication Date: 2019-12-20
JIANGSU TIANNIAO HIGH TECH
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thin-walled carbon fiber prefabricated body is soft, especially when the density is low, it is not easy to ensure the dimensional accuracy and parallelism, and the mold is often used for loading and shaping in the handling and later chemical vapor infiltration process (CVI)
However, this method requires mechanical processing to remove the mold in the later stage, and the mold will also affect the efficiency of the CVI process, resulting in a more complicated overall process and increased production costs. Overall performance and stability have been reduced

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Large thin-wall carbon fiber needling prefabricated body and preparation method thereof
  • Large thin-wall carbon fiber needling prefabricated body and preparation method thereof
  • Large thin-wall carbon fiber needling prefabricated body and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] refer to figure 1 , a large thin-walled carbon fiber preform Y1, the carbon fiber needle-punched preform is a flat fabric with a specification of 800mm×500mm×4mm, and the volume density of the carbon fiber preform is required to be 0.45g / cm 3 . The needle-punched prefabricated body is composed of 16 structural unit layers, and each structural unit layer is composed of 1 layer of carbon fiber / PE fiber hybrid mesh tire and 1 layer of carbon fiber / PE fiber hybrid plain weave cloth. Among them, the density of the carbon fiber / PE fiber hybrid mesh tire is 50g / m 2 , wherein the content of PE fiber is 50wt%; the density of carbon fiber / PE hybrid plain weave is 250g / m 2 , wherein the content of PE fiber is 20wt%.

[0030] Prepare the carbon fiber preform Y1 as follows:

[0031] (1) Production of mixed fiber cloth and mixed fiber mesh

[0032] (1.1) Preparation of carbon fiber / PE fiber hybrid cloth:

[0033] 12K carbon fiber yarn is used as the warp yarn, 800D PE fiber yar...

Embodiment 2

[0045] refer to figure 2 The last two layers of the unit layer, that is, 3 and 4 layers, a large thin-walled carbon fiber prefabricated body Y1, the carbon fiber needle-punched prefabricated body is a flat fabric with a specification of 500mm×500mm×2mm, and the volume density of carbon fiber is required to be 0.10g / cm 3 . The acupuncture prefabricated body is composed of 8 structural unit layers, and each structural unit layer is composed of 1 layer of carbon fiber mesh tire and 1 layer of PP film. Among them, the density of the carbon fiber net tire is 50g / m 2 , the thickness of the PP resin film is 0.1mm.

[0046] Prepare the carbon fiber preform Y1 as follows:

[0047] (1) Production of fiber mesh tires

[0048] Distribution The carbon fiber is chopped, the chopped length of the carbon fiber is 50mm, and after opening, carding and laying, the surface density is 50g / m 2 mixed fiber mesh tire;

[0049] (2) Preparation of structural unit layer

[0050]A layer of carbon...

Embodiment 3

[0058] refer to figure 2 , a large thin-walled carbon fiber preform Y3, the carbon fiber needle-punched preform is a cylindrical fabric with a length of 800mm, an inner diameter of 600mm, and a wall thickness of 2mm. The volume density of carbon fiber is required to be 0.80g / cm 3 . The acupuncture prefabricated body is composed of 4 structural unit layers, and each structural unit layer is composed of 2 layers of carbon fiber mesh, 2 layers of carbon fiber unidirectional cloth and 4 layers of PC film. Among them, the density of the carbon fiber mesh tire is 100g / m 2 , the density of carbon cloth is 300g / m 2 , PC film thickness is 0.05mm.

[0059] Prepare the carbon fiber preform Y3 as follows:

[0060] (1) Production of carbon fiber cloth and carbon fiber mesh

[0061] (1.1) Preparation of carbon cloth:

[0062] Use 12K carbon fiber yarn as the warp yarn and polyester yarn as the weft yarn binding yarn, weaving on the loom with an area density of 300g / m 2 carbon fiber ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a large thin-wall carbon fiber prefabricated body. Resin exists in prefabricated body structural unit layers or among the prefabricated body structural unit layers; the unit layer structures serve as the structural unit layers formed by sequentially superposing and then needling carbon fiber net tires, resin films and carbon cloth; or the unit layer structures serve as thestructural unit layers formed by sequentially superposing and then needling carbon fiber / resin fiber net tires and carbon fiber / resin fiber mixed fabric; and the large thin-wall carbon fiber prefabricated body is prepared by superposing the unit structure layers by multiple layers via hot pressing. The prefabricated body has the certain rigidity and the relatively high size accuracy, and has a relatively small influence on the structure of C / C composite substrate carbon, and subsequent CVI technology forming is facilitated.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a large-scale thin-walled carbon fiber needle-punched prefabricated body of carbon / carbon, carbon / ceramic and other composite materials prepared by a chemical vapor infiltration method and a preparation method thereof. Background technique [0002] C / C composites are widely used in the aerospace field because of their high strength-to-mass ratio and good thermal conductivity. However, in order to reduce the structural weight, thin-walled structures are widely used in the aerospace field, that is, the wall thickness of C / C composite materials is required to be as thin as possible, the internal and external surface deformation should be as little as possible, and certain mechanical properties must be maintained. Acupuncture carbon fiber preform has the characteristics of uniform pore distribution, good densification and high in-plane performance. It is a multi-purpose a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B29B11/12B29B11/14B29C70/12
CPCB29B11/12B29B11/14B29C70/12B29C2949/303B29C2949/3062B29C49/071B29C2949/0715
Inventor 缪云良
Owner JIANGSU TIANNIAO HIGH TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com