Method for surface treatment of composite material part and treated part

Patent metadata

Field	Value
Publication number	US-11072134-B2
Application number	US-201816112907-A
Country	US
Kind code	B2
Filing date	Aug 27, 2018
Priority date	Aug 25, 2017
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

The disclosure provides a method for surface treatment of a composite material part and the prepared part. The method comprises the steps of: (1) providing a surface of a carbon fiber composite material part; (2) preparing a surface protection layer; (3) polishing the carbon fiber reinforced resin-based composite material surface after transparent powder is cured; (4) spraying transparent powder to the carbon fiber reinforced resin-based composite material surface after the transparent powder thereon is cured and curing it; (5) polishing the carbon fiber reinforced resin-based composite material surface after the transparent powder is cured; and (6) spraying a clear lacquer to the carbon fiber reinforced resin-based composite material surface after the transparent powder is cured and curing it.

First claim

The invention claimed is:

1. A method for surface treatment of a composite material part, wherein the method comprises the steps of: (1) providing a surface of a carbon fiber composite material part; (2) preparing a surface protection layer: firstly, laying a carbon fiber twill on the surface of the carbon fiber composite material part, then closing a mold, and introducing, heating, curing and molding acrylic resin, such that a carbon fiber reinforced resin-based composite material surface is formed; and then spraying first transparent powder on the carbon fiber reinforced resin-based composite material surface and curing the first transparent powder; (3) polishing the carbon fiber reinforced resin-based composite material surface after the first transparent powder is cured; (4) spraying second transparent powder on the carbon fiber reinforced resin-based composite material surface obtained from step (3) and curing the second transparent powder; (5) polishing the carbon fiber reinforced resin-based composite material surface after the second transparent powder is cured; and (6) spraying a clear lacquer on the carbon fiber reinforced resin-based composite material surface obtained from step (5) and curing the clear lacquer by heating; a curing temperature when the first transparent powder or the second transparent powder is cured is less than 180° C.,
wherein in step (1), the surface of the carbon fiber composite material part is prepared according to the following method: preparing a structural layer of a composite material wheel from a pre-preg of carbon fiber reinforced epoxy resin, wherein the composite material wheel is prepared using a winding process and an autoclave process, with a molding temperature being 150° C., and a molding pressure being 0.5 MPa.

2. The method according to claim 1 , wherein in step (2), the carbon fiber twill is 2-4 layers of carbon fiber twill.

3. The method according to claim 1 , wherein in step (2), the first transparent powder is acrylic transparent powder, and has a thickness of 40 to 60 microns.

4. The method according to claim 1 , wherein in step (2), the step of introducing the acrylic resin is completed by a resin transfer molding (RTM) process.

5. The method according to claim 1 , wherein in step (3), the carbon fiber reinforced resin-based composite material surface is polished using sandpaper of 800-1000 meshes, cleaned with deionized water, and then baked at 70-80_° C. for 40-50 minutes.

6. The method according to claim 1 , wherein in step (4), the second transparent powder is acrylic transparent powder, and has a thickness of 60 to 80 microns.

7. The method according to claim 1 , wherein in step (5), the carbon fiber reinforced resin-based composite material surface is polished using sandpaper of 800 mesh, cleaned with deionized water, and baked at 70-80_° C. for 40-60 minutes by infrared heating.

8. The method according to claim 1 , wherein in step (6), the clear lacquer is an acrylic clear lacquer, and has a thickness of 15 to 20 microns.

9. A composite material part obtained by the method of claim 1 .

10. A composite material part obtained by the method of claim 2 .

11. A composite material part obtained by the method of claim 3 .

12. A composite material part obtained by the method of claim 4 .

13. A composite material part obtained by the method of claim 5 .

14. A composite material part obtained by the method of claim 6 .

15. A composite material part obtained by the method of claim 7 .

16. A composite material part obtained by the method of claim 8 .

Assignees

• Citic Dicastal Co Ltd

Inventors

• Xu Zuo
• Xiong Guoyuan
• Xiao Ling
• Cao Jianqiang
• A Lateng
• Zhang Donghui
• Zhang Wei

Classifications

• B29C70/86

  Incorporated in coherent impregnated reinforcing layers, {e.g. by winding} · CPC title

• B29C2071/0045

  Washing using non-reactive liquids · CPC title

• B29C70/48

  and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM] {, e.g. by vacuum} · CPC title

• B29C70/34 Primary

  and shaping or impregnating by compression {, i.e. combined with compressing after the lay-up operation} · CPC title

• B29L2031/32

  Wheels, pinions, pulleys, castors or rollers {, Rims (inner tubes B29L2023/245; gears B29L2015/003; tyres B29L2030/00)} · CPC title