car paint craft

The standard process of automotive paint includes inspection of the lines, flat (arc) surfaces, gaps, grinding and bevelling of sheet metal repair parts, dust removal, cleaning, sticking, coating primer, filling putty, grinding putty, and extra-fine atoms Ash, use P280# sandpaper to thoroughly polish the old paint on the body that needs to be sprayed with intermediate paint, use a pressure gun and a silicon-removing cleaner to remove dust and stains on the body, paste masking paper, spray the intermediate paint, sand the intermediate paint, check: check Grinding effect, can do micro-filling, remove dust and stains on the car body, cover the car body, blow out the dust spots on the car body, remove the dirt on the car body, blow out the dust in the gap of the car body, stick the fine dust on the car body, finish paint The steps of spraying plain paint, spraying base paint, varnish spraying, drying, waxing and polishing.

Automotive paint process

  1. Check the flatness of sheet metal repairs

  First, check whether the parts to be painted are flat, wipe the painted parts without sheet metal, and check whether there are dents.

  2. Grinding the part that needs to be filled with soil

  Use a grinder to treat the edge of the sheet metal, use sandpaper to grind the feather edge around the sheet metal, and then use sandpaper to polish the old paint surface to expand the scope of filling soil.

  3. Clean and oil

  After sanding, clean the sanding position and the painting position.

  4. Medium coating

  Try to control the primer in a small range, and pay attention to the gradual edge position, not step-like.

  5. Sanding and coating

  After the primer is dried and cured, sand the primer with sandpaper and prepare to fill the soil.

  6. Filling soil

  Fill the car surface with putty in the low recess and dry it.

  7. Grinding

  After selecting different grinding methods according to different surface shapes, the edge of the putty and the old paint of the original car will be smoothly transitioned to the assembly line requirements of the original car.

  8. Spray primer or scrape eye ash

  Spray primer or scrape the eye ash on the filling area and smooth out some small holes of the putty and damage to the coating.

  9. Primer sanding

  Grind the primer or eye-filling ash. After leveling, use sandpaper to expand the grinding range to enhance the adhesion of the new paint surface on the old paint film. After grinding, you can enter the preparation before painting.

  10. Blow water to cover

  For all edge interfaces within the range to be painted, use compressed air to dry the water in the edge seams, and cover the unpainted parts.

  Automotive paint process requirements

  In the past, the repair and coating of the paint on the surface of the car body was mostly done by bicycles by the automobile maintenance units in our country. In order to ensure the quality of the paint on the surface of the car body, the equipment of the auto paint spray booth is generally used. There are many manufacturers of paint spray booths, which are divided into three types: large, medium and small. The large size can be used for group coaches, the medium size is suitable for medium-sized station wagons, and the small size is suitable for cars. When there is no small equipment, the large and medium size can also be used. Substitute. There are two types of heating methods: electric heating method and diesel heating method. Generally, the electric heating method is more convenient, the price is higher, and the capacity needs to be increased. Some diesel heating methods use imported burners, which have relatively high thermal efficiency, so pay attention to safety when using them. Regardless of the type, the spray booth should be preheated before use. If you can work on several vehicles in a row, you can save money.

  The paint spraying room has requirements on the air purification rate, so it is necessary to use air filter materials. Generally, high-efficiency non-woven filter cloths are used. After long-term use, new ones should be replaced when the pollution is serious.

  There are also requirements for the lighting and baking equipment in the paint spray booth. The light is bright, soft and has a long service life, so that the surface of the car body can be seen clearly and the paint quality can be guaranteed. The temperature of the baking equipment is required to be constant and the baking is uniform. Only by using the electronic control system and program control can the process of painting and baking be controlled by program, ensuring that the equipment is easy to use, stable and reliable, and can achieve satisfactory results in the paint repair and coating of automobiles.