What is a Wide Area Ultrasonic Nozzle?
Brief Introduction:
The wide area nozzle utilizes a special air forming device that can form a lateral fan-shaped shape. This design can be integrated into reciprocating systems or deployed in series with multiple nozzles to achieve wide width coating. A reciprocating system with a nozzle is usually used to apply flux to the bottom surface of a printed circuit board in a wave soldering machine. The serial system can be used for various applications ranging from float glass to textiles.
Principle:
Ultrasonic nozzles convert high-frequency sound waves into mechanical energy through piezoelectric transducers, and then convert the mechanical energy into liquid. This longitudinal upward and downward vibration generates standing waves in the liquid film at the tip of the ultrasonic nozzle, where the amplitude of these waves can be controlled by a power generator. These stationary liquid waves can extend upwards from the top of the ultrasonic nozzle, and when the droplets leave the atomizing surface of the nozzle, they are decomposed into a uniform fine mist of micrometer sized droplets.
Unlike pressure nozzles, ultrasonic nozzles do not use high pressure to force liquid through a small hole to produce spray. The liquid enters through a relatively large nozzle center without pressure and is atomized by ultrasonic vibration inside the nozzle.
Each ultrasonic nozzle operates at a specific resonant frequency, which determines the median size of the droplet. The difference in droplet size is very small, and its distribution can be accurately predicted within a certain range through mathematical calculations. For example, a 120 kHz nozzle produces a median droplet size of 18 microns when spraying water. The higher the frequency, the smaller the decrease in median value.
Advantage:
1. Uniform coating: uniformity>95
2. Save raw materials: The utilization rate of raw materials is over 85%, which is four times that of traditional two fluid spraying
3. High precision control of coating thickness: 20nm to tens of microns of coating can be prepared, with precise control of coating thickness
4. The atomized particles are uniform, and the spray flow is extremely low
5. It can be sprayed intermittently or continuously
6. Will not block the nozzle
7. Anti corrosion nozzle
8. High precision controllable spraying
