Pearl white paint spraying process for vehicle bumpers
A technology of automobile bumper and pearl white, applied in the direction of surface pretreatment, coating, device for coating liquid on the surface, etc. The effect of increasing the thickness of the paint film, reducing the settling, and reducing the orange peel defects of the paint film
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[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 step: 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 step: treat the surface of the automobile 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 qui...
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