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Preparation method of lightweight hollow woven fabric type composite material seat backrest

A seat back and composite material technology, applied in chemical instruments and methods, seats, railway car body parts, etc., can solve the problems of poor mechanical properties, poor comfort, low efficiency, etc., and achieve improved mechanical properties, rapid prototyping, and solution easily misplaced effect

Active Publication Date: 2018-03-30
NANJING FIBERGLASS RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the defects of low efficiency, easy dislocation, poor mechanical properties and poor comfort in the manufacture of seat backs in the prior art, the present invention provides a method for preparing seat backs made of lightweight hollow fabric composite materials

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
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  • Preparation method of lightweight hollow woven fabric type composite material seat backrest
  • Preparation method of lightweight hollow woven fabric type composite material seat backrest
  • Preparation method of lightweight hollow woven fabric type composite material seat backrest

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for preparing a lightweight hollow fabric composite seat back comprises the following steps:

[0033] 1) Cleaning the mold: Wipe the dust on the surface of the mold with a brush or a soft rag until there is no dust on the surface of the mold. The cleaning of the mold has a very important impact on the smoothness of the surface of the product and the difficulty of demoulding. After cleaning The mold requires a smooth surface, no dust, no pits, etc.;

[0034] 2) Wipe the surface of the mold evenly with a clean rag dipped in a little NC-55 release agent (Henkel Loctite). During the wiping process, try to make the rag brush evenly in one direction, and there should be no omissions when brushing. The interval between each application is 15 minutes, and the number of application is 5 times;

[0035] 3) Use Taishan glass fiber EW400 fiber cloth to prepare the fiber prefabricated body, and use 3M spray glue to bond the multi-layer fiber cloth into a laminate structure...

Embodiment 2

[0046] A method for preparing a lightweight hollow fabric composite seat back comprises the following steps:

[0047] 1) Cleaning the mold: Wipe the dust on the surface of the mold with a brush or a soft rag until there is no dust on the surface of the mold. The cleaning of the mold has a very important impact on the smoothness of the surface of the product and the difficulty of demoulding. After cleaning The mold requires a smooth surface, no dust, no pits, etc.;

[0048]2) Wipe the surface of the mold evenly with a clean rag dipped in a little NC-55 release agent (Henkel Loctite). During the wiping process, try to make the rag brush evenly in one direction, and there should be no omissions when brushing. The interval between each application is 10 minutes, and the number of application is 3 times;

[0049] 3) Use Taishan glass fiber EW400 fiber cloth to prepare the fiber prefabricated body, and use 3M spray glue to bond the multi-layer fiber cloth into a laminate structure,...

Embodiment 3

[0060] It is basically the same as Example 2, except that: after the pouring in step 8), heating at a temperature of 60°C for 8 hours, after the heating process, the system is cooled naturally, and the seat back is obtained after demoulding.

[0061] Through the test, the mechanical properties of the fiber preform are tensile strength 302MPa, test standard GB / T1447-2005; bending strength 310Mpa, test standard GB / T1449-2005; three-dimensional hollow fabric flat compression 3MPa, test standard GB / T1453-2005 .

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Abstract

The invention discloses a preparation method of a lightweight hollow woven fabric type composite material seat backrest. The seat backrest comprises two supporting plates, and a supporting surface which is arranged between the two supporting plates, wherein the two supporting plates are manufactured through fiber preforms; the supporting surface is manufactured through three-dimensional hollow woven fabrics. According to the method, the fiber preforms are used as the supporting plates, so that the problem of easy deviating of the conventional paving layers can be solved, and the mechanical property of the seat backrest is obviously improved; moreover, the preform paving and vacuum flow guiding integrated forming technology is performed, thus quick forming is achieved, and the problems suchas weak interface is avoided; the requirement on lightweight railcars in future can be met; in addition, the mechanical property of the seat backrest can be further improved.

Description

technical field [0001] The invention relates to a method for preparing a lightweight hollow fabric composite material seat back, which belongs to the field of research and development of composite material products in the transportation field. Background technique [0002] Composite materials are widely used in the field of rail transit vehicles because they have higher specific strength and specific stiffness than metal materials such as aluminum alloys. The application of composite material components can reduce vehicle consumption and save energy, and can greatly increase vehicle operating speed. [0003] The traditional support board of the seat back is prepared by laying layers directly in the mold, the production efficiency is low, and the laying process is difficult to ensure the laying orientation of the fibers, and it is easy to cause fiber misalignment during the laying process. Moreover, existing seat backs made of composite materials have defects such as poor mec...

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
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B17/02B32B17/06B32B9/00B32B9/04B32B7/12B61D33/00
CPCB32B5/02B32B7/12B32B9/047B32B17/067B32B2262/101B32B2262/106B61D33/0035
Inventor 陈同海周正亮张守玉
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD
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