There are a wide variety of ultrasonic cleaning machines on the market. How can manufacturers choose the right ultrasonic cleaning machine to better meet their production needs.

1、 Selection of power

The ultrasonic cleaning effect is not necessarily proportional to (power x cleaning time), and sometimes even with low power, it takes a long time to remove dust and dirt. If the power reaches a certain value, sometimes the dust and dirt can be quickly removed. If the power is chosen to be too high, the cavitation intensity will be greatly increased, and the cleaning effect will be improved. However, this will also cause corrosion points on more precise parts, resulting in significant losses. In addition, the cavitation at the oscillation plate at the bottom of the cleaning cylinder is severe, and water point corrosion will also increase. When using organic solvents such as trichloroethylene, there is basically no problem, but when using water or water-soluble cleaning solutions, it is easy to suffer from water point corrosion. If the surface of the oscillation plate has been damaged, cavitation corrosion at the bottom of the water will be more severe under high power. Therefore, the ultrasonic power should be selected according to the actual application situation.

2、 Frequency selection

The ultrasonic cleaning frequency ranges from 28kHz to 120kHz. When using water or water cleaning agents, the physical cleaning force caused by hole action is obviously beneficial for low frequencies, usually around 28-40kHz. For cleaning parts with small gaps, narrow slits, and deep holes, use high frequency (usually 40kHz)

Above) is better, even several hundred kHz. When cleaning clock parts, use 400kHz. If broadband frequency modulation cleaning is used, the effect will be even more outstanding.

3、 Application of cleaning basket

When cleaning small items, a mesh basket is often used because the mesh can cause ultrasonic attenuation, which requires special attention. It is better to use a mesh size of 10mm or more when the frequency is 28kHz.

4、 Selection of cleaning solution temperature

The most suitable cleaning temperature for water cleaning solution is 40-60 degrees Celsius

℃, especially in cold weather, if the temperature of the cleaning solution is low and the cavitation effect is poor, the cleaning effect is also poor. Therefore, some cleaning machines wrap heating wires around the outside of the cleaning cylinder for temperature control. When the temperature rises, cavitation is prone to occur, so the cleaning effect is better. As the temperature continues to rise, the gas pressure inside the bubble increases, causing a decrease in the impact sound pressure, reflecting the synergistic effect of these two factors.

5、 Determination of the amount of cleaning solution and the orientation of cleaning parts

It is preferable for the liquid level of the cleaning solution to be at least 100mm higher than the surface of the oscillator. Because the single frequency cleaning machine is affected by the standing wave field, the amplitude at the nodes is very small, and the amplitude at the waves is large, resulting in uneven cleaning. Therefore, it is recommended to place the cleaning items at the wave amplitude.

6、 Ultrasonic cleaning process and selection of cleaning solution

Before purchasing a cleaning system, the following application analysis should be conducted on the cleaned parts: clear information on the composition, structure, and quantity of the cleaned parts, analysis and clarity of the dirt to be removed. These are all prerequisites for determining what cleaning method to use and whether to use water-based cleaning solution or solvent. The final cleaning process still needs to be validated through cleaning tests. Only in this way can suitable cleaning systems, well-designed cleaning processes, and cleaning solutions be provided. Considering the influence of the physical properties of cleaning solution on ultrasonic cleaning, vapor pressure, surface tension, viscosity, and density should be the most significant influencing factors. Temperature can affect these factors, so it can also affect the efficiency of cavitation. It is necessary to use cleaning solution for any cleaning system.

Article source: Jiangmen Ultrasonic Cleaning Machine http://www.kpzfcsb.com/