Aluminum tape spraying process, please?
Inspection. Inspection of the workpiece coating, there are leaks, bumps, pins, bubbles and other defects, should rework, re spray(9) defect handling. Rework or re spray the workpiece that is missing, such as spray, pinholes, bumps, bubbles, etc.
Curing. The workpiece after spraying is sent into a baking chamber at 180~200 DEG C to heat it and solidify the powder(7) cleaning. After the coating is solidified, remove the protective material and trim the burr
Preheat. Generally without preheating. If the coating is thicker, the workpiece can be preheated to 180~20 degrees, which can increase the coating thickness(5) spraying. Under the high voltage electrostatic field, the powder gun is connected to the negative pole, and the workpiece is grounded (Zheng Ji) to form a circuit. The powder is ejected by the spray gun with the compressed air, that is, the negative charge is applied to the workpiece according to the principle of the opposite phase suction
(1) surface pretreatment, mainly degreasing and rust removing, the method is the same as that of liquid paint(2) putty. According to the degree of workpiece defects, coated with conductive putty, after drying with sandpaper grinding smooth, you can carry out the next process(3) protection (also known as covering). If some parts of the workpiece do not require coating, it can be covered with protective glue before preheating so as to avoid spraying paint
