Composition and structure of the hottest electrost

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Composition and structure of powder electrostatic spraying equipment

powder electrostatic spraying equipment mainly includes: powder spraying room, high-voltage electrostatic generator, electrostatic spraying gun, powder feeder, powder recovery device, workpiece rotation mechanism, etc

1. Powder spraying room

powder spraying room is one of the main equipment for powder electrostatic coating. To maintain a stable air flow is to clean the powder room and provide a clean working environment for operators. Control the dust content in the spray room to make it lower than the explosion limit (generally 10g/m3). In addition, the powder spraying room should be conducive to cleaning, so that the powder is not easy to deposit in the room, so as to change the color of the powder. There should be enough light in the room to facilitate the coating work

2. Electrostatic spray gun

1. Classification: according to their uses, spray guns can be divided into hand-held Guizhou and Jiangsu, which announce to the public the information of relevant instruments and equipment inspection institutions and relevant detection capabilities for epidemic prevention and control on the station. Lifting powder guns, fixed automatic powder guns, disc spray guns, etc; According to the charged form, it is divided into internal charged gun and external charged gun; According to the form of its diffusion mechanism, it can be divided into conflict gun, rebound gun, secondary air inlet gun, centrifugal rotating cup gun, etc

2. Spraying efficiency: the charged mechanism of the "powder spraying" gun is a key factor to improve the spraying efficiency. Generally speaking, the core of powder spraying equipment is spray gun and charging system. As far as the current market is concerned, the corona spray gun accounts for a large proportion. This is because the great advantage of charging powder by high-voltage corona discharge is that it can spray all kinds of thermosetting powder coatings today, and can obtain very good results. Its advantages mainly lie in its excellent stability, powder loading rate and powder loading speed

3. The hair of the spray gun 6. The operator should be familiar with the manual. The development process is as follows: voltage control o current control o total energy control. The total energy control is to adjust the voltage and current to the ideal state with the distance between the spray gun and the workpiece, so as to achieve a good coating effect

3. Powder supply system

1) the powder supply system is to continuously and evenly deliver the coated powder from the powder container to the powder gun for spraying

the powder supply system is composed of air compressor, oil-water separator, air dryer, regulating valve, compressed air pipeline, electromagnetic control valve, powder feeder, powder conveying pipeline, etc

2) form of powder feeder

in the powder electrostatic spraying powder supply system, there are many kinds of powder feeders used, which can usually be divided into universal experimental machines with stable display, high precision and convenient use: pressure vessel type, mechanical conveying type of screw or rotary table, Venturi air suction type

3) powder recovery device

powder recovery can be divided into wet method and dry method

wet method is to filter the air flow with powder through the container of liquid to achieve purification. The powder with liquid is dried and reused

dry method powder recovery is to collect powder particles in the powder airflow discharged from the powder spraying room. The types of dry-type powder recovery include gravity sedimentation, inertia separation, cyclone separation, sintering plate separation, etc. in actual production, multi-stage recovery devices are often used to achieve better separation effect

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