Pearl white paint spraying process for vehicle bumpers

A technology of automobile bumper and pearl white, which is applied in the direction of pretreatment surface, coating, and the device for coating liquid on the surface, etc., which can solve the problems such as unsatisfactory orange peel effect, unqualified, and fading of product paint color, etc., to achieve Effects of reducing paint film orange peel defects, reducing settlement, and increasing paint film thickness

CN103056079AActive Publication Date: 2013-04-24WUHAN LIAOYUAN MOLDING
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2013-04-24

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Abstract

The invention relates to a spraying process for vehicle bumpers, in particular to a pearl white paint spraying process for vehicle bumpers. The process includes the steps of pre-treating, flame treatment, primer spraying, colored floating coat spraying, pearl paint spraying, varnish spraying, and baking. Colored floating coat and pearl paint are subjected to paint ratio adjustment, so that viscosity of the colored floating coat is increased. The development of special spraying process of pearl white paint enables a conventional common automatic spraying line to produce pearl white products, and production efficiency is improved. The film thickness, appearance and performance quality of the pearl white products fully meet the quality requirements of vehicle manufacturers. The spraying qualification rate of the pearl white products reaches 90%, and the target that the spraying qualification rate of commonly used colored paints is not smaller than 88% is achieved.
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Description

technical field

[0001] The invention relates to an automobile bumper spraying process, in particular to an automobile bumper pearl white spraying process. Background technique

[0002] Pearl white is a special color, which needs to be sprayed according to the following standards: pre-treatment - flame treatment - primer spraying - 2 times of intermediate paint spraying - intermediate paint baking - grinding - Wipe - 1 time pearl paint spray - varnish spray - bake. The spraying process of commonly used color paints is: pretreatment - flame treatment - primer spraying - 2 times color paint spraying - varnish spraying - baking.

[0003] It can be seen that the main differences are: (1) pearl white needs to be sprayed with two different color paints, while commonly used color paints only need to be sprayed with one color paint; (2) pearl white needs to be baked twice; but the conventional automatic coating line Generally, there is no paint baking furnace, and there is no sandi...

Examples

Embodiment Construction

[0021] Please refer to figure 1 , the embodiment of the present invention automobile bumper pearl white painting technique, comprises the following steps successively:

[0022] Pretreatment steps: Spray with an acid cleaning agent with a total acidity value of 4 for 3 minutes; (the model of the acid cleaning agent is PP1, and the manufacturer is Shanghai Chemetall);

[0023] Flame treatment steps: Treat the surface of the car bumper with oxygen-enriched flame to make the surface tension reach more than 40 dynes;

[0024] Primer spraying steps: Use ABB air spray gun robot to spray conductive primer on the surface of the car bumper, so that the dry film thickness reaches 4-6 microns, leveling for 3 minutes; (primer model is R606G100D, the manufacturer is Tianjin PPG paint company) ;

[0025] Spraying steps of intermediate color paint: use ABB electrostatic rotary cup robot to spray the intermediate color paint once; all the thinners in the intermediate color paint are quick-d...