Pretreatment: Purpose: To remove the oil, dust and rust on the surface of the workpiece and form a "phosphating layer" on the surface of the workpiece, which can resist corrosion and increase the adhesion of the spraying layer. Main process steps: degreasing, derusting, phosphating and passivation. After pretreatment, the surface of the workpiece is not only free of oil, rust and dust, but also forms a uniform and rough gray phosphating film on the original silver-white shiny surface, which can prevent rust and increase the adhesion of the sprayed layer. 2. Purpose of electrostatic spraying: Powder coating should be evenly sprayed on the surface of the workpiece. Special workpieces (including parts prone to electrostatic shielding) should be sprayed with high-performance electrostatic plastic spraying machine. Process steps: using electrostatic adsorption principle, evenly spray a layer of powder coating on the surface of the workpiece; The fallen powder is recovered by the recovery system and can be reused after screening. 3. High temperature curing purpose: heat the powder coating on the surface of the workpiece to a specified temperature and keep it for a corresponding time, so as to melt, level and cure it, so as to obtain the required surface effect of the workpiece. Process steps: push the sprayed workpiece into a curing furnace, heat it to a predetermined temperature (generally 185 degrees), and keep the temperature for a corresponding time (15 minutes); Opening the furnace, taking out, and cooling to obtain the finished product. Generally speaking, the heating temperature and holding time of different workpieces are different. Tip: heating and control system (including electric heating, fuel oil, gas and coal burning)+incubator = curing furnace. 4. Cooling from the furnace. Off-furnace cooling is the process of cooling the result of plastic spraying and returning it to normal temperature. 5. Decorative treatment purpose: make the workpiece after electrostatic spraying achieve a special appearance effect, such as various wood grains, patterns, luster, etc. Process steps: range hood; Equal transfer printing process. Hangzhou Schindler Plastic Spraying Factory, located in Lushan Street, Fuyang City, Hangzhou, is a factory with many years of experience in surface treatment. Professional manufacturer of electrostatic spraying. The main injection molding products are communication industry, post and telecommunications equipment industry, air conditioning panels, guardrails and so on. Electrostatic spraying adopts imported equipment, which has no pollution to the construction environment and no toxicity to human body. Suitable for spraying products such as electrical cabinets, cable bridges, aluminum alloy surfaces, anti-glare boards of expressways, fences and guardrails, fitness equipment, castings, etc.