The type of spray gun used in the coating machine

The type of spray gun used in the coating machine

Guangdong richpacking specializes in the production of coating machines. There are two main types of coating machine spray guns:

1. Hydraulic airless spray gun: this kind of spray gun mainly USES high static water pressure to make liquid through a small hole to form fog drops. Its main advantage is that aerosols generally do not bounce back. However, the parameters of spray can only be adjusted by the gun. Even if the nozzle aperture used is very small, the required static water pressure is very high. In addition, the fluid of coating solution should be very good, otherwise the droplet size is not easy to control. Hydraulic airless spray gun can be used for organic solvent coating.

2. It's an air gun. The energy of the spray gun mainly comes from the high-speed airflow, the air flow and is going to be spray coating liquid collision will accelerate to its critical speed, the liquid under the high speed air parcel finally forming droplets. Its main advantage is that it not only can adjust the gun piston, can also be used in the coating process by atomizing pressure to adjust droplets sector and injection speed, so that the particle diameter is more evenly dispersed, is beneficial to form more smooth coat film, although coating will appear a few droplets rebound phenomenon, but now he is still a relatively fine spray gun. Therefore, it is widely used in film coating production. Spray gun, the gas cap is very important, it can not only affect the particle size distribution of droplets, mist from the shape and the droplets collision momentum on the surface of the heart, and the gas cap with hole Angle of spray gun, can produce a larger gas velocity, can make the droplets are smaller, more conducive to form a smooth film.