What Is Coating Machinery?
Coating machinery is used to coat objects by spraying them with a mist of paint. They are used in automobile and other manufacturing plants, as well as at construction sites. Various principles of coating methods have been developed, including the airless type, which applies direct pressure to the paint and sprays it out in atomized form. The compressor type simultaneously sprays out high-pressure air from a compressor and paint, and the electrostatic type applies voltage to electrodes and sprays paint in an atomized form.
Uses of Coating Machinery
Coating machinery is used in production plants for automobiles, home appliances, electronic equipment, etc., construction sites, and manufacturing plants for airplanes, ships, etc. Coating machinery and dryers are used in factories to apply the coating on the production line automatically. Coating machinery with portable compressors and other equipment is used at construction sites and in the manufacturing process of large machines. When selecting coating machinery, it is necessary to consider the accuracy of the coating, how quickly the coated area dries, the speed of the coating, the size of the coating machinery, and the ease of operation.
Principle of Coating Machinery
The following is a description of the operating principles of coating machinery, divided into airless, compressor, and electrostatic types.
- Airless Type
The airless type consists of a tank for storing paint, a diaphragm or centrifugal machine for applying pressure to the tank, and a blow-off head. During operation, pressure is applied to the tank that stores the paint, the paint moves from the tank to the spray head, and the paint is sprayed at high speed so that it spreads from the tip of the head. Since no air is used, the coating speed is high. - Compressor Type
The compressor type consists of a compressor, a tank of paint, and a spraying head. During operation, the high-speed air from the compressor collides with the paint in the head and sprays it out in atomized form. This is the most common and widely used portable type of coating machinery. - Electrostatic Type
The electrostatic type consists of a compressor, a pressure tank containing paint, and a spray head with electrodes attached. In operation, by applying voltage to the electrodes, the paint that comes out under pressure is transformed into a mist by electrical force and ejected from the blowout head. It is characterized by its ability to apply paint with high precision.