What is the production process of automobile painting production line? The process flow of coating production line is divided into pretreatment, powder spraying and heating curing. The following is the specific process: 1. Pretreatment: Pretreatment includes manual simple process and automatic pretreatment process, and the latter is divided into automatic spraying and automatic dip coating. Before powder spraying, the workpiece must be surface treated to remove oil stain and rust. There are many chemical solutions used in this workshop, mainly including rust remover, degreasing agent, surface treatment agent and phosphating agent. 2. Powder spraying: For small batch of workpieces, manual powder spraying device is generally adopted, and for large batch of workpieces, manual or automatic powder spraying device is generally adopted. Quality control is very important whether it is manual powder spraying or automatic powder spraying. It is necessary to ensure that the sprayed workpiece powder is evenly coated and the thickness is consistent, so as to prevent defects such as spraying, missed spraying and powder dropping. 3. Heating curing: If it is a small batch of one-piece production, pay attention to prevent powder from falling before entering the curing furnace. If there is powder rubbing phenomenon, powder should be sprayed again in time. Strictly control the process, temperature and time when baking, and pay attention to prevent insufficient curing caused by color difference, over-baking or short time. @20 19