Spraying process of automobile paint

1. Dust removal and cleaning: firstly, blow off the dust spots on the car body with a pressure gun, remove the stains on the car body with a desiliconized cleaner, blow off the dust in the gaps of the car body with a pressure gun, and finally remove the dust on the car body with a dust cloth.

2. Spray plain paint on top coat: spray 2~3 layers, with the interval of 5~ 10 minute for each layer, and add curing agent and diluent according to the temperature.

3. Primer spraying: spray 2-3 layers of plain paint, silver powder paint or pearlescent paint every 5- 10 minute.

4. Spray painting: spray two layers of varnish at an interval of 5~ 10 minute, and add curing agent and diluent according to the temperature.

5. Drying: let stand for 5~ 10 minute and dry at 60 degrees Celsius for 30 minutes. Drying and curing need to be judged. If you feel sticky with your fingers, the surface is dry; If the touch has no fingerprints, it is semi-hard; If you don't fingerprint, it's completely dry.

Extended data:

Before spraying construction, the spray gun and related equipment should be clean and in normal working condition, and check whether the spray gun produces ideal spray shape. The ideal spray shape should be symmetrical, the atomization particle size distribution should be uniform, and the edge should be clear. Only a small amount of paint mist can exist outside the edge of the spray shape. Low atomization air pressure is helpful to produce a correct and uniform spray shape and reduce rebound and overspray.

The correct spraying trajectory is perpendicular to the workpiece surface. When spraying, according to the angle of the coated surface, the distance between the spray gun and the sprayed surface is generally 15~30cm. In order to obtain a wetter, darker and thicker coating, the distance can be closer; In order to obtain a drier, lighter and thinner coating, the distance can be longer.