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Automobile body coating method

A coating method and technology for automobile bodies, which are applied to devices for coating liquids on surfaces, coatings, electrolytic coatings, etc. The effect of energy consumption, reduction of heating energy consumption, and reduction of energy consumption

Inactive Publication Date: 2018-08-03
HUNAN GEELY AUTOMOBILE COMPONENTS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The scheme disclosed in CN 104399657A is the three-coating and two-baking production process. The three-coating and two-baking production process has very mature application experience, but its disadvantages are that the process is complicated, the coating production line is long, and the intermediate coating and top coat need to be carried out twice. Baking consumes a lot of energy and increases production costs
The problem of high energy consumption and high cost of traditional technology has become increasingly prominent
When the paint used in the conventional three-coat, two-bake coating method is used in the three-coat, one-bake method, the wet film thickness after the top coat is too thick, which causes heat rash or blisters, resulting in poor workability. Lowering the problem

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as figure 1 As shown, the automobile body coating method of the present invention, the steps are as follows: body-in-white coating, degreasing and phosphating → electrophoretic coating → electrophoretic drying and cooling → coating PVC sealant and anti-stone impact coating → spraying damping glue → PVC glue pre-baking Drying and cooling→Spray intermediate coating→Spray topcoat→Spray varnish→Topcoat drying and cooling.

[0046] The degreasing and phosphating process includes: flood water rinsing→pre-degreasing→degreasing→water washing 1→water washing 2→surface adjustment→phosphating→water washing 3→water washing 4→pure water washing 1→draining.

[0047] The flood water washing method is: spraying, the treatment time is 100s, the temperature is 40-50°C, and the pH value is 10-12.8.

[0048] The pre-degreasing method is: spraying, the treatment time is 100s, the temperature is 43°C, and the degreasing liquid is prepared by using SF-3000 degreasing agent and deionized...

Embodiment 2

[0068] Such as figure 1 As shown, the automobile body coating method of the present invention, the steps are as follows: body-in-white coating, degreasing and phosphating → electrophoretic coating → electrophoretic drying and cooling → coating PVC sealant and anti-stone impact coating → spraying damping glue → PVC glue pre-baking Drying and cooling→Spray intermediate coating→Spray topcoat→Spray varnish→Topcoat drying and cooling.

[0069] The degreasing and phosphating process includes: flood water rinsing→pre-degreasing→degreasing→water washing 1→water washing 2→surface adjustment→phosphating→water washing 3→water washing 4→pure water washing 1→draining.

[0070] The flood water washing method is: spraying, the treatment time is 100s, the temperature is 40-50°C, and the pH value is 10-12.8.

[0071] The pre-degreasing method is: spraying, the treatment time is 80s, the temperature is 40°C, and the degreasing liquid is prepared by using SF-3000 degreasing agent and deionized ...

Embodiment 3

[0092] Such as figure 1 As shown, the automobile body coating method of the present invention, the steps are as follows: body-in-white coating, degreasing and phosphating → electrophoretic coating → electrophoretic drying and cooling → coating PVC sealant and anti-stone impact coating → spraying damping glue → PVC glue pre-baking Drying and cooling→Spray intermediate coating→Spray topcoat→Spray varnish→Topcoat drying and cooling.

[0093] The degreasing and phosphating process includes: flood water rinsing→pre-degreasing→degreasing→water washing 1→water washing 2→surface adjustment→phosphating→water washing 3→water washing 4→pure water washing 1→draining.

[0094] The flood water washing method is: spraying, the treatment time is 100s, the temperature is 40-50°C, and the pH value is 10-12.8. The pre-degreasing method is: spraying, the treatment time is 120s, the temperature is 50°C, and the degreasing liquid is prepared by using SF-3000 degreasing agent and deionized water, i...

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Abstract

The invention discloses an automobile body coating method. The automobile body coating method comprises the following steps of white automobile body coating degreasing and phosphating, electrophoreticcoating, electrophoretic drying and cooling, coating of a PVC sealant and anti-stone coating, spraying of damping adhesive, pre-drying and cooling of PVC adhesive, spraying of floating coat, sprayingof finishing coat, spraying of varnish and drying and cooling of the finishing coat. According to the automobile body coating method, medium-low-temperature degreasing is adopted, low-temperature phosphating is adopted for phosphating, and little or no steam heating is used according to room temperature conditions; high solid coat is used, the floating coat and the finishing coat are subjected towet-on-wet coating and then subjected to baking, and the floating coat drying process and the post-grinding process of the floating coat are omitted; through appropriate processes, equipment design and reasonable process parameter setting and monitoring, the coating surface quality state of the automobile body in each process is controlled; and the energy-saving automobile body coating method hasthe low energy consumption and low VOC.

Description

technical field [0001] The invention relates to the technical field of automobile body painting production, in particular to an automobile body painting method. Background technique [0002] With the continuous improvement of the country's environmental protection requirements, environmental protection and energy saving are the development trends of automobile production. In the process of automobile manufacturing, the energy consumption required for painting accounts for about 80% of the total energy consumption of the four major processes of the vehicle. The energy consumption of painting mainly comes from the process of spraying and baking paint. Pay attention to energy-saving coating process. At present, the traditional coating process adopts medium-temperature degreasing and phosphating (degreasing temperature 50-60°C, phosphating temperature 45-50°C) products, the degreasing and phosphating temperature is high, and steam heating is required throughout the year; the mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D13/20C25D13/12B05D7/00
CPCB05D7/57C25D13/12C25D13/20
Inventor 黄超群李忠夫
Owner HUNAN GEELY AUTOMOBILE COMPONENTS
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