Aluminum profile spraying process
Pretreatment -- drying, removing moisture -- spraying -- Inspection -- baking -- Inspection -- finished.1, construction requirements, general powder spraying construction requirements:(1) in order to give full play to and extend the service life of the coating, the surface of the coating is strictly treated by surface pretreatment first(2) when spraying, the coating must be completely ground to increase the spraying efficiency of the powder coating(3) to be coated with larger surface defects, it should be coated with conductive putty to ensure the smooth and smooth coating(4) after the spraying, the objects and articles should be heated, cured and solidified. The technical indexes of the powder products should be adopted, but the curing temperature and time should be guaranteed so as to avoid the quality failures caused by solidification(5) check immediately after spraying, if found defects should be timely treatment, if after curing defects are found, the only local small range without affecting, the coated surface decoration, can use the same color powder and acetone diluted to repair, if the scope is large and affects the surface quality, use sandpaper after again. Or use the paint remover to remove the coating, re Suo powder.(6) the recovered powder must be screened and removed, and then mixed with the new powder at a certain proportion(7) the powder supply barrel, the powder spraying room and the recycling system should avoid contamination by other colors. Therefore, each color change must be cleaned
Powder coating construction technology and requirements of the powder electrostatic spraying is the use of the principle of high voltage electrostatic corona electric field. With high-voltage anode in the gun head on the metal guide, is formed by spraying electrode of the workpiece, the formation of a strong electrostatic field between the gun and the workpiece. When the compressed air as carrier gas, powder coating from guide rod for powder barrels by powder pipe to spray gun, the corona discharge guide rod is connected with the high voltage anode is generated, and the negative charge density in the vicinity of the powder, with a negative charge, and entered into the field of electrostatic field strength is very high, in the dual role of static electricity and gas. The powder evenly ground to powder layer formed on the surface of workpiece thickness uniformity, and heat curing into durable coating coating construction process:
