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      Shengjichuan Industrial Automation Equipment

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      Basic process of surface coating

      Date of issue:2021-05-20 Author: Click:

      The surface coating of auto parts coating equipment includes the three basic processes of surface treatment, coating process and drying before coating, as well as selecting appropriate coatings, designing a reasonable coating system, and determining good operating environmental conditions. In the important links of quality, process management, technology and economy, the appearance quality of surface coating products not only reflects the protection and decoration performance of the product, but also constitutes an important factor in the value of the product.

      Electrostatic coating is to form a high-voltage electrostatic field between the spray gun or spray plate and the workpiece to be coated. Generally, the workpiece is grounded as the anode, and the nozzle of the spray gun is at negative high voltage. The air near the nozzle of the electrostatic coating produces corona discharge, causing air to occur. Ionization, when the paint particles are charged through the muzzle and become dotted particles. When they pass through the corona discharge zone, they are further combined with the ionized air to be charged again. The electrostatic coating is combined with the high-voltage electrostatic field. The coated workpiece with opposite polarity moves and deposits on the surface of the workpiece to form a uniform layer.

      The spraying machine is a special coating equipment using spraying technology. The principle of the spraying machine is to control the air flow to instantly push the air distribution reversing device to reverse, so that the piston of the air motor can reciprocate stably and continuously. After the spraying machine enters the compressed air, the piston When moving to the upper or lower end of the cylinder, the upper pilot valve or the lower pilot valve is actuated, and the air flow is controlled to instantly push the air distribution reversing device to reverse, so that the piston of the air motor makes stable and continuous reciprocating motion.

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