Plastic spraying the general production process flow

Annealing oil removal to eliminate static electricity, dusting spray drying 1. Annealing of the plastic molding forms internal stress, stress concentration place is easy to crack after coating. Annealing treatment can be used or finishing process, eliminating stress. Annealing treatment is to put the ABS plastic under heat to heat distortion temperature, that is 60 ℃, heat preservation 2 h. Due to adopting this process requires a lot of equipment investment, therefore, can use the whole surface treatment technology, namely configuration can eliminate the internal stress of plastics solution at room temperature on the surface of the plastic for the processing of 15 ~ 20 min. 2. Oil removal plastic parts surface is stained with oil, often hand sweat and release agent, it will make the coating adhesion is poor, coating cracks, bubbles and fall off. Should carry on the oil removal treatment before painting. For plastic parts usually clean with gasoline or alcohol, then should be thoroughly clean the surface residue after chemical degreasing lye, with a clean water to clean, dry or drying. 3. Except electricity and dedusting plastic products are insulators, surface resistance is in commonly 1013 Ω, easy to produce static electricity. Charged easy adsorption after the small dust in the air and attached to the surface. By static adsorption of dust blowing with general method to remove very difficult, using high pressure ionization air flow at the same time, in addition to the electric effect is better. 4. Spraying of plastic coating thickness is 15 ~ 20 microns, spraying usually take 2 ~ 3 way to complete. A spray drying after 15 min, and then on the second spraying. Need shining surface spray must also be transparent coating. After coated parts for basic have no effect on flame retardant properties. 5. After drying coating can from dried at room temperature, can also be used under the condition of 60 ℃ baking 30 min.