First blow away the garbage on the product surface with an air gun (manual) ------ polish and polish the product with defects (such as dents) (manual) ------ hang up (manual) ------ degrease and degrease ------ pickling ------ cleaning ------ phosphating ------ powder spraying ------ baking (drying) ------ hang down (manual) ------ check the packaging (manual) thickness The inspection of powder spraying includes thickness gauge and impact resistance test

1. Pretreatment of hardware powder spraying and painting: degreasing, water washing and pickling for 15-30min (hydrochloric acid and sulfuric acid), water washing, neutralization and water washing, surface conditioning and phosphating (skin contact) for 15-30min

Requirements: the metal surface shall be free of rust, the skin shall be dark gray and uniform, the surface shall be free of white ash, and the metal surface shall be baked free of moisture (special attention shall be paid to the absence of drug flow marks at the water hole)

2. The first primer is mainly applied for rust prevention. The baking time of front correction plate and rear correction leveling is generally determined by the processing time. The process temperature of this process is generally set at 100 ℃ - 120 ℃ (the current temperature conditions are determined according to the process). The best way is to work on the assembly line. Main equipment: DISK can be used for spray gun if conditions permit

3. The third and second points are basically the same, but the workmanship is different. The temperature is between 120 and 180 degrees (depending on the paint characteristics and process), usually the top coat and gold oil

4. The inspection specification depends on the customer requirements and the requirements of the company's quality control department. The main test method is ball drop test

Precautions: The surface shall be free of bumps, scratches, color differences, sagging (flow marks), color pollution, impurities, burrs, uncorrected, and leakage. The surface shall be flat without unevenness. The surface of the base material shall be flat and smooth (if necessary, it can only be operated after polishing), and other requirements specified by the customer (packaging, etc.)