Method of repairing local damaged coating on metal surface

A metal surface, local technology, applied to the device for coating liquid on the surface, pretreatment surface, coating, etc., can solve problems such as inability to overcome defects, ineffectiveness, etc., to reduce the texture of the paint surface and the color paint layer. The rough process, saving time and good effect

Active Publication Date: 2005-04-27
北京冠都永顺汽车技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The difference between this method and 97103951.8 is only that after sanding and before painting, an adhesive is added to improve the fastness of the paint on the interface, but it still cannot overcome the defects of the method of 97103951.8, and s

Method used

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  • Method of repairing local damaged coating on metal surface
  • Method of repairing local damaged coating on metal surface

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1

[0035] The damaged car was a black Mercedes-Benz sedan. There was a 3.5cm-diameter damage on the paint surface of the front cover, and the damage was uneven. The repair methods used are:

[0036] First of all, use 400# water sandpaper to thoroughly clean and polish the damaged part, polish the damaged and weakly adhered paint leather, and remove the oil stains, wax stains and dirt on the surface. Fill the uneven part with putty and further smooth the surface with 500# water sandpaper.

[0037] Spray the primer on the place where the putty is filled. The selected primer is American PPG Gaoba primer, and the thickness of the sprayed primer is 10% of the thickness of the original paint. After the primer is dry, sand the area within 4 times the area of ​​the sprayed primer: first use 600# water sandpaper to polish the area within 2 times the area of ​​the sprayed primer, and then use 1500# water sandpaper Sand the rest of the entir...

Example Embodiment

[0043] Example 2

[0044] With embodiment 1, the difference is that the damaged vehicle is a white car, and its front door has been scraped a scratch of about 5cm.

[0045] The difference in the process is that the damaged part is polished with 500# water sandpaper at the first grinding, and then the scratched part is filled with putty, and then smoothed with 600# water sandpaper after filling. The primer selected for spraying is the acrylic modified anti-rust primer of Guangdong Zhongshan Sencai Machinery Coating Company, and the thickness of the sprayed primer is 30% of the thickness of the original paint surface. After the primer is dry, sand the area within 5 times the area of ​​the sprayed primer: first use 800# water sandpaper to polish the area within 3 times the area of ​​the sprayed primer, and then use 1800# water sandpaper Sand the rest of the entire sanded area.

[0046] When spraying the paint, the selected paint is American PPG whit...

Example Embodiment

[0050] Example 3

[0051] With embodiment 1, the difference is that the damaged vehicle is a sapphire blue motorcycle, and its body has been rubbed off with a length of 4 centimeters and a paint surface of about 3 centimeters wide.

[0052] The difference in the process is that the damaged part is polished with 600# water sandpaper during the first grinding. Because the damaged area does not need to be filled, the primer is sprayed directly. The selected primer is the waterborne epoxy automotive primer from Wujin Xinhua Chemical Factory. The thickness of the spray primer is 50% of the thickness of the original paint surface. After the primer is dry, sand the area within 5 times the area of ​​the sprayed primer area: first use 1000# water sandpaper to polish the area within 2 times the area of ​​the sprayed primer area, and then use 2000# water sandpaper Sand the rest of the entire sanded area.

[0053] The color paint used when spraying the c...

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Abstract

The method of repairing local damaged coating on metal surface includes cleaning and polishing damaged part; spraying primer and polishing the area of 4-5 times of the primer area; spraying color lacquer to the area of 2-3 times of the primer area; painting varnish in the area of 1-1.2 times the color lacquer area; spraying the edge of varnish area with interface solution; and final polishing. The said technological process is suitable for repairing all painted metal surface, such as automatic, motorcycle, ship, etc. and can reach natural fusion with original coating.

Description

technical field [0001] The invention relates to a method for repairing local paint surface damage on metal surfaces, in particular to a method for repairing local paint surface damage on metal surfaces including automobiles and ships. Background technique [0002] At present, the domestic automobile industry, shipbuilding and other industries are developing rapidly, and the corresponding maintenance industry is also gradually flourishing, and the repair of local paint damage on the surface of various metal materials is the most common. When carrying out general spray paint repair now, regardless of the size and degree of the damaged area, generally all adopt the method of completely removing the paint surface and then carry out all spraying. This method is not only time-consuming, labor-intensive, and material-consuming, but also it is difficult to achieve the same roughness of the paint surface texture and the color paint layer after repairing the adjacent parts as the orig...

Claims

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Application Information

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IPC IPC(8): B05D1/38B05D3/00B05D7/14
Inventor 郭新军
Owner 北京冠都永顺汽车技术服务有限公司
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