The main equipment of paint spraying is spray gun. The requirements of the early spray gun are very simple, that is, after simple operation, the paint can be sprayed on the surface of the construction parts, and the same is true of the car body surface. With the development of the automobile manufacturing industry, higher requirements have been put forward for the spray effect, efficiency and quality of the spray gun, and the technical content of the spray gun is also getting higher and higher. Now, with the society's attention to environmental protection and energy conservation, the development of paint spraying equipment has a new trend.

(1) The trend of paint coating - green and environmental protection

Modern automobile maintenance puts forward higher requirements for paint coating, that is, to improve the transmission efficiency of paint spraying. On the one hand, it reduces the amount of paint spray splashing into the air, making the air cleaner and protecting the environment; On the other hand, it can reduce the consumption of paint and save the cost of maintenance enterprises. In order to improve the transmission efficiency of paint spraying equipment, there are two technical trends at present: one is to use the environment-friendly and paint saving high flow low pressure atomization technology (HVLP), and the other is to use the paint saving high efficiency medium pressure atomization technology (RP).

(2) Performance demand and development trend of spray gun

In order to meet the requirements of energy conservation and environmental protection for paint spraying, the performance and structural design of modern paint spray guns meet the following requirements.

① The spray range of the spray gun is large and stable.

② The atomized paint is evenly distributed on the spray width.

③ The paint particles sprayed are uniform in size.

④ Thin paint layer, such as HS/VHS/UHS paint.

⑤ The smaller the overspray area during spraying, the better.

⑥ Cooperate with the interview of the latest paint to develop the most suitable nozzle.

⑦ It can ensure smooth and even paint film after spraying.

⑧ The gun body shall be designed according to ergonomics for easy operation and durability.

⑩ The adjustment and setting of the spray gun is simple and fast.

In order to ensure the spraying effect of the spray gun, more and more spray gun manufacturers have installed digital air pressure regulating devices on the spray gun, which is more conducive to the operation of spraying personnel.

(3) Development trend of paint spraying related equipment

In order to ensure the quality of paint spraying operation and the requirements of energy conservation and environmental protection, modern paint spraying equipment, in addition to putting forward more requirements for the performance of the spray gun, has also made great improvements in other related equipment during the paint spraying process.

① In the more environmentally friendly water-based paint coating system, three filters are used to further purify the compressed air.

② Activated carbon filter is used in the protective mask of paint spraying personnel to avoid paint contamination of paint spraying personnel.

③ Provide comprehensive air supply masks that can protect the entire head and respiratory system for paint spraying personnel.

④ Adopt a more environmentally friendly and convenient gun pot system.

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