Air spraying is the process of using compressed air to spray out from the center hole of an air cap, creating a negative pressure zone in front of the paint nozzle. This causes the paint in the paint container to be sprayed out from the paint nozzle and immediately enter a high-speed compressed air flow. 

The air discharged by a regular fuel injection air compressor cannot be directly used by pneumatic devices. The air compressor sucks in air containing moisture and dust from the atmosphere, and after compression, the temperature of the air increases to about 140 ℃~170 ℃. At this time, some of the lubricating oil in the air compressor also becomes gaseous. In this way, the compressed air discharged by the air compressor is a high-temperature gas containing oil, moisture, and dust.

Dalian metal and plastic coating requires equipment operators to be proficient in the construction, performance, operation, and maintenance methods of various machinery, and to ensure dedicated personnel use and responsibility. Before the machinery starts working, it must be tested and all components must operate normally before it can start working. 

According to the painting production process, painting exhaust gas mainly comes from pre-treatment, spraying, and drying processes. 

Usually, metal surfaces are covered with dust, oil stains, oxide scales, rust layers, pollutants, salt content, or loose old paint films. The success of painting mainly depends on the quality of surface treatment. If these substances are not removed and directly applied, it will inevitably affect the adhesion and anti-corrosion ability of the entire coating.

Dalian metal plastic coating is heated and melted. For wire, when the end enters the high-temperature area of the heat source, it is heated and melted; For powders, they enter the high-temperature area of the heat source and are heated, melted, or softened during their movement. During the jet flight of melted or softened fine particles, the particles are first accelerated to form a particle flow, and as the flight distance increases, the particle velocity gradually decreases.