Airless paint sprayer is a special coating equipment using spraying technology. The principle 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 make stable and continuous reciprocating motion. The inhaled paint is pressurized, and the paint is delivered to the spray gun of the sprayer through the high-pressure hose, and the paint is instantly atomized by the spray gun and then released to the surface of the object to be coated.
Spraying machines are mainly divided into high-pressure spraying machines, airless spraying machines and electrostatic spraying machines.
The spraying machine is mainly composed of a feeding device, a spray gun, and an atomization source. The cause of atomization is different for different types of spraying machines. The atomization source of high-pressure sprayer is composed of air compressor, air pipe, air oil-water separator, and air storage tank; the atomization source of airless sprayer is composed of power source and high-pressure pump; the atomization source of electrostatic sprayer It is composed of high frequency and high voltage electrostatic generator.
The spraying process consists of two parts: spraying and drying. The working mechanism includes a spray booth equipped with nozzles, a leather conveyor belt, a drying system, and a cleaning mechanism. Nowadays, rotary multi-nozzle closed spraying chambers are mostly used, and the nozzles are opened and closed by ultrasonic or computer control, which realizes leather spraying, no leather spraying; saving coating agent, reducing pollution, and high coating efficiency. The sprayed leather is sent to the drying zone by the conveyor belt, and after drying, the spraying machine is a special spraying equipment using high-pressure airless spraying technology.
High-pressure airless spraying, also known as airless spraying, uses a high-pressure plunger pump to directly pressurize the paint to form high-pressure paint, and spray out the muzzle to form an atomized airflow to act on the surface of the object (wall or wood surface). Compared with air spraying, the paint surface is uniform and non-grainy. Due to the isolation from the air, the paint is dry and clean. Airless spraying can be used for the construction of high-viscosity paint, and the edges are clear, and it can even be used for some spraying projects with boundary requirements. Depending on the type of machinery, it is also divided into pneumatic airless sprayers, electric airless sprayers, and internal combustion airless spray sprayers.
Comparison of airless spraying and other spraying. The high-pressure airless sprayer uses a high-pressure plunger pump to pressurize the paint to 3000PSI (210kg/cm), and the high-pressure paint is delivered to the spray gun through the high-pressure hose, and the paint sprayer releases the pressure through the nozzle Form atomization, airless sprayer to form a dense coating on the wall surface. Because the paint atomization does not require compressed air, it is called airless spraying.
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