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Hub coating process

A wheel and coating technology, applied in the direction of coating, electrolytic coating, electrophoretic coating, etc., can solve the problems of technical parameters to be explored, border crossing and mutual dissolution of color paint, etc., to meet the appearance requirements and achieve the effect of good appearance

Inactive Publication Date: 2016-11-16
KAIPING ZHONGLV IND
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

When different paints are applied to the surface of the wheel hub, there may be undesired cross-border and miscible phenomena at the edge of the paint due to the miscibility of the paint applied first and the solvent of the paint applied later
[0004] The electrophoresis process has already been maturely applied in the fields of automobile body and chassis parts, but as far as the wheel is concerned, everyone's thinking is mainly concentrated on the traditional high-pressure air spraying or electrostatic spraying, so they did not think of combining electrophoresis with the production of the wheel. Its technical parameters also to be explored

Method used

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Embodiment Construction

[0023] The best embodiment of the present invention will be further described in detail below.

[0024] The coating process of described wheel hub, concrete steps are:

[0025] 1. Degreasing: Use alkaline degreasing agent to spray and degrease the hub at 50°C for 2 minutes; spray pressure 0.1-0.15MPa, alkali point: 6-8;

[0026] 2. Water washing: Submerge the wheel hub 1 in clean water, the temperature of the water is 40-50°C, the time is 7-8 minutes, the conductivity is 7.0;

[0027] 3. Pickling: use tank immersion method, formula of pickling and derusting solution: industrial hydrochloric acid with a concentration of 31%, corrosion inhibitor 3%, temperature: 40-50°C, treatment time 3-8 minutes;

[0028] 4. Water washing: Submerge the hub of No. 3 in clean water, the temperature of the water is 40-50°C, and the conductivity is <600μs / cm;

[0029] 5. Passivation: Passivation: use chromium-free passivation agent, immerse the hub in step 4 in chromium-free passivation agent, s...

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Abstract

The invention discloses a hub coating process. The hub coating process comprises the following steps: 1, degreasing; 2, washing with water; 3, pickling; 4, washing with water; 5, passivating; 6, washing with water; 7, spraying bottom powder; 8, drying; 9, spraying colored paint; 10, carrying out electrophoresis; and 11, drying. After being subjected to electrophoresis, the product is good in appearance, does not have defects such as shrinkage cavities or a rough paint film, and can meet requirements of automobile manufacturers to appearances of electrophoresis hubs, and therefore, promotion of the product is facilitated.

Description

technical field [0001] The invention belongs to the technical field of automobile supplies, and in particular relates to a coating process of a wheel hub. Background technique [0002] With the development of the motor vehicle industry, the output and stock of motor vehicles have increased, driving economic development and bringing convenience to people's travel. [0003] In the manufacture of aluminum alloy wheels, the heat resistance of the surface paint is highly required, and high temperature curing is often used to cure the paint. This makes it difficult to apply different colors to different parts of the hub surface by using the sticking and covering method. Because different color paints have different adhesion to the base powder layer, it is difficult to continuously spray different color paints to the surface of the wheel hub in different steps. When different color paints are applied to the surface of the wheel hub, the solvents of the color paint applied earlier...

Claims

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Application Information

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IPC IPC(8): C25D13/14C25D13/20
CPCC25D13/14C25D13/20C25D13/22
Inventor 黄房富
Owner KAIPING ZHONGLV IND
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