Powder electrostatic spraying equipment composition and structure, powder electrostatic spraying equipment mainly include: powder room, high voltage electrostatic generator, electrostatic spraying gun, powder feeder, powder recovery device, workpiece rotation mechanism. Powder room Powder spraying room is one of the main equipment for powder electrostatic painting. The smooth air flow is clean in the powder room and provides a clean working environment for the operators. Control the dust content in the spray chamber, making it lower than the explosion limit (generally 10g/m3). In addition, the powder spraying room is conducive to cleaning, so that the powder is not easy to deposit in the house, in order to change the color of the powder, the room should have enough light, in order to facilitate coating work. electrostatic spray gun 1, classification: spray gun can be classified according to their use of hand-held spray gun, fixed automatic spray gun, disc type spray gun; according to the form of charged into the gun and gun charged with electricity; according to the diffusion mechanism can be divided into the form of conflict type gun, rebound gun, two times into the air gun, centrifugal cup type gun. 2, spraying efficiency: the electrification mechanism of the powder gun is the key factor to improve the spraying efficiency. On the whole, the core of the powder spraying equipment is the spray gun and charging system. On the market, the proportion of corona gun is great, this is because of the high voltage corona discharge way of powder is the biggest advantage of charging is thermosetting powder coatings can be sprayed today of all kinds, and can obtain very good results. The main advantages are excellent stability, flour rate and powder speed. 3, the development process of spray gun is like this: voltage control, O current control, O total energy control. The total energy control is that the voltage and current are constantly adjusted to the ideal state with the spray gun working away from the workpiece, so as to achieve the best painting effect. Powder feeding system 1) the powder feeding system is that the coated powder material is transported continuously from the powder container to the powder spraying gun for spraying. The powder supply system consists of air compressor, oil water separator, air dryer, regulating valve, compressed air pipe, electromagnetic control valve, powder feeder and powder conveying pipeline. 2) the form of powder feeder is in powder electrostatic spraying powder feeding system, and the powder feeder is used widely. It can be divided into mechanical conveying type of pressure vessel, screw or rotary disc, and air suction in venturi. 3) the powder recovery can be divided into wet method and dry method. Wet method is to let the airflow with the powder through the liquid container to filter, to purify, with liquid powder after drying treatment and reuse. Dry powder recovery is the collection of powder particles in the powder air stream discharged from the powder spraying room. The types of dry powder recovery include gravity sedimentation, inertia separation, cyclone separation, sintering plate separation, etc. in actual production, multistage recovery device is often used to achieve better separation effect. The coating technology and equipment of powder are introduced here, and the paint technology and equipment are briefly introduced.