Paint spraying process for automobile carbon fiber composite material

A composite material and carbon fiber technology, which is applied to the device for coating liquid on the surface, pretreatment surface, coating and other directions, can solve problems such as painting process, and achieve the effect of good coating performance, high gloss and high vividness

Inactive Publication Date: 2017-05-10
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to make carbon fiber composite materials widely used in automobile bodies and parts, the purpose of the present invention is to provide a painting process of carbon fiber composite materials for automobiles, which is a highly decorative and high-performance auto parts made of carbon fiber composite materials. The advanced painting process, which solves the technical problems of the painting process

Method used

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  • Paint spraying process for automobile carbon fiber composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] For carbon fiber composite materials after grinding, the surface roughness Ra is 1.0-1.2, and the surface is allowed to have a little grinding marks and a few pinholes (the pinhole size is generally Φ0.5mm-Φ2mm) for high decorative painting, such as figure 1 The general process flow shown is:

[0029] (1) Grinding: After grinding, the roughness Ra of the substrate is 1.0-1.2;

[0030] (2) Wipe clean: wipe off the sanding dust with a sticky cloth, and check for no dust by visual inspection;

[0031] (3) Spray putty: dry at room temperature for 30 minutes, ambient temperature 18°C~35°C, relative humidity RH40%~70%, thickness 30μm~40μm;

[0032] (4) Water grinding: water grinding treatment is carried out for surface defects of the coating after spraying putty, making it smooth;

[0033] (5) Primer: dry at room temperature for 30 minutes, ambient temperature 18℃~35℃, relative humidity RH40%~70%, thickness 30μm~40μm;

[0034] (6) Water grinding: local water grinding treat...

Embodiment 2

[0047]For carbon fiber composite materials after grinding, the surface roughness Ra is 0.8-1.0, and the surface is allowed to have a little grinding marks and a few pinholes (the pinhole size is generally Φ0.5mm-Φ1mm) for high decorative painting. The general process is:

[0048] (1) Grinding: After grinding, the roughness Ra of the substrate is 0.8-1.0;

[0049] (2) Wipe clean: wipe off the sanding dust with a sticky cloth, and check for no dust by visual inspection;

[0050] (3) Spray putty: dry at room temperature for 30 minutes, ambient temperature 18°C~35°C, relative humidity RH40%~70%, thickness 30μm~40μm;

[0051] (4) Water grinding: water grinding treatment is carried out for surface defects of the coating after spraying putty, making it smooth;

[0052] (5) Primer: dry at room temperature for 30 minutes, ambient temperature 18℃~35℃, relative humidity RH40%~70%, thickness 30μm~40μm;

[0053] (6) Water grinding: local water grinding treatment is carried out for the su...

Embodiment 3

[0064] For carbon fiber composite materials after grinding, the surface roughness Ra is 0.7-0.8, and there are no grinding marks and pinholes on the surface for high decorative painting. The general process is:

[0065] (1) Grinding: After grinding, the roughness Ra of the substrate is 0.7-0.8;

[0066] (2) Wipe clean: wipe off the sanding dust with a sticky cloth, and check for no dust by visual inspection;

[0067] (3) Primer: Dry at room temperature for 30 minutes, ambient temperature 18℃~35℃, relative humidity RH40%~70%, thickness 30μm~40μm;

[0068] (4) Water grinding: local water grinding treatment is carried out for the surface defects of the coating after spraying the primer, which is smooth and smooth;

[0069] (5) Intermediate coating: ambient temperature 18℃~35℃, relative humidity RH40%~70%, thickness 30μm~40μm;

[0070] (6) Drying: The drying temperature is 80°C, and the holding time is 30 min~40 min;

[0071] (7) Topcoat: ambient temperature 18℃~35℃, relative h...

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Abstract

The invention relates to a paint spraying process for an automobile carbon fiber composite material. The paint spraying process is characterized by comprising the following steps that a carbon fiber workpiece needing to be painted is polished, putty is sprayed at the normal temperature, after the surface of a putty layer is dried, water polishing treatment is conducted aiming at coating surface defects after the putty is sprayed, thus, the coating surface is flat and smooth visually, primer is sprayed at the normal temperature, local water polishing treatment is conducted aiming at coating surface defects after the primer is sprayed, and the coating surface is flat and smooth visually; for a primer layer, if a few of scratches, particles, shrinkage cavities or pinholes exist, secondary normal-temperature putty spraying is conducted; otherwise, a floating coat is sprayed directly and then is dried, finish paint is sprayed, after finish paint spraying is conducted, the immediate drying temperature is 18-35 DEG C, the relative humidity RH is 40%-70%, the time is 7-10 min, the drying temperature is 130-150 DEG C after the finish paint is sprayed, and the heat preservation time is 20 + / - 2 min; and whether the surface of the workpiece is flat, smooth and free of shrinkage cavity is inspected, and the surface has a flashing effect. By means of the paint spraying process for the high-decoration and high-performance automobile part made of the carbon fiber composite material, the technical problems of paint spraying processes are solved.

Description

technical field [0001] The invention relates to a painting process of carbon fiber composite materials for automobiles, in particular to a painting process of highly decorative and high-performance auto parts made of carbon fiber composite materials, and to the technical field of paint and coating. Background technique [0002] In recent years, with the development of lightweight automobiles, carbon fiber composite materials have been used more and more in the automotive field due to their outstanding technical advantages. Internals. In the current F1 racing car (Formula One World Championship), most of the body structure is made of carbon fiber composite materials. However, due to the complexity of its preparation process and the high cost of raw materials, carbon fiber composite materials are not widely used at present. In particular, the preparation methods and processes of domestic carbon fiber composite materials are relatively backward at present, and it is difficult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/00B05D3/12B05D3/02
CPCB05D3/0254B05D3/12B05D7/584B05D2203/30B05D2350/30B05D2350/50
Inventor 王纳新廖大政谢舜张馨月周胜蓝高成勇张澍赵冉
Owner CHINA FIRST AUTOMOBILE
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