Transformation From Ordinary Spraying To Ultrasonic Precision Spraying

As a surface treatment method, spraying technology generally exists in material test research and industrial production. With the continuous improvement of material surface requirements and environmental protection concepts, some traditional spraying methods have failed to meet the product requirements. At this time, ultrasonic precision spraying can be tried. So, what kind of situation can be changed?

As a kind of precision spraying, the biggest advantage of ultrasonic precision spraying is: uniformity, precision and material saving. Ultrasonic precision spraying is a unique spraying technology and a spraying method based on ultrasonic atomization technology. The material to be sprayed is first in liquid state, and the liquid can be solution, sol, suspension, etc. The liquid coating is first atomized into fine particles by an ultrasonic atomizing device, and then uniformly coated by a certain amount of carrier gas (≤0.15MPA). Coated on the opposite surface of the substrate to form a coating or film.

Ordinary spraying often uses high-speed airflow to blow away liquid materials and spray them on the substrate. It is difficult to achieve the effect of ultrasonic spraying with technical expertise and precision. There is also the problem of wasting raw materials due to paint splashing during the spraying process. .

Compared with ordinary spraying, ultrasonic spraying has the advantage of rolling, which is one of the reasons why ultrasonic precision spraying is more and more widely used.

First, the uniformity of ordinary spraying can not meet the requirements of the situation

The uniformity of fine particles after ultrasonic precision spraying can reach more than 95%. In addition, an ultrasonic dispersion system can also be configured, which can realize on-line dispersion, stirring and supply of the nano-solid particle dispersion liquid, and avoid the agglomeration and precipitation of the dispersion liquid during the spraying process.

2. The thickness of the coating film of ordinary spraying cannot meet the requirements

Ultrasonic precision spraying can obtain a more uniform, thinner and more controllable film coating, and the dry film thickness can reach several tens of nanometers. It is a nano-scale spraying method. Moreover, the forming of spraying is controllable, which can be precisely controlled by the working frequency of the nozzle, the atomization flow, and the number of spraying.

3. There is splashing in the existing spraying, a lot of waste of raw materials and even can not meet the environmental protection requirements

Unlike traditional spray heads that rely on pressure and high-speed motion to pulverize liquids into small particles, ultrasonic spray heads use lower ultrasonic vibration energy to atomize liquids. Ultrasonic precision spraying is a kind of atomization spraying. When the liquid material leaves the nozzle, it has been atomized into evenly distributed fine particles. Only the tiny gas with a pressure of ≤0.15MPA can be carried to the surface of the substrate to form a coating or film. Because the air pressure of the carrier gas is very low, the paint splashing during the spraying process is significantly reduced, and the purpose of saving paint is achieved. The paint utilization rate of ultrasonic spraying is more than 4 times that of traditional two-fluid spraying.

In addition, the nozzle of the ultrasonic precision spraying machine is made of titanium alloy material, which has the characteristics of high strength and corrosion resistance. In theory, the properties of the liquid material are not limited, but through a lot of tests, the viscosity is less than 50cps at present, Only liquid materials with a solid content of less than 20-30% can be atomized.