Shanghai Bilang briefly describes how to choose an ultrasonic cleaning machine.
How to choose an ultrasonic cleaner
The ultrasonic cleaning machine adopts the principle of ultrasonic cleaning, which can achieve the overall cleaning effect of objects, especially for deep holes, blind holes, and concave and convex groove cleaning. It is the most ideal equipment, and does not affect the material and accuracy of any objects. At the same time, it can be used for extraction and degassing in the laboratory of biochemistry, physics, chemistry, medicine, scientific research and colleges and universities. Mix well, crush the cells, and use them for nano-decomposition. Therefore, how to buy a good ultrasonic cleaning machine is particularly important. Let us briefly introduce how to choose a good ultrasonic cleaning machine by our Suzhou Jiangdong Precision Instrument Co., Ltd. Purchase products are mainly considered from the following two major aspects:
Power selection
Ultrasonic cleaning sometimes uses low power and takes a long time without removing dirt. If the power reaches a certain value, the dirt will be removed quickly. If the power is too large, the cavitation intensity will be greatly increased, and the cleaning effect is improved, but at this time, more precise parts also have pitting, and the vibration plate at the bottom of the washing machine is cavitation serious, and the water spot corrosion is also increased. When using organic solvents such as trichloroethylene, there is basically no problem, but when using water or water-soluble cleaning fluid, it is easy to be corroded by water spots. If the surface of the vibration plate has been damaged, the cavitation corrosion under the power is more serious, so The ultrasonic power should be selected according to the actual use.
Frequency selection
The frequency of ultrasonic cleaning is from 28kHz to 120kHz. When using water or water cleaning agent, the physical cleaning force caused by the cavity action is obviously beneficial to low frequency, generally about 28-40kHz. For the cleaning of parts with small gaps, slits, and deep holes, it is better to use high frequencies (generally above 40kHz), even hundreds of kHz. When cleaning watch parts, use 100kHz. If you use broadband FM cleaning, the effect is better.
Cleaning fluid temperature
1. The most suitable cleaning temperature for water cleaning liquid is 40-60 ℃, especially when the temperature of the cleaning liquid is low when the temperature is low, the cavitation effect is poor, and the cleaning effect is also poor. Therefore, some washing machines are equipped with heating electric wires around the outside of the washing cylinder for temperature control. When the temperature rises, cavitation is easy to occur, so the cleaning effect is better. When the temperature continues to increase, the gas pressure in the cavity increases, causing the impact sound pressure to decrease, and the effect will also be weakened. Organic solvent cleaning fluid should be cleaned at a temperature close to the boiling point.
2. The amount of cleaning fluid and the position of the cleaning parts
3. Generally, the cleaning liquid level is more than 100mm above the vibrator surface. Because the single frequency washer is affected by the standing wave field, the amplitude at the node is very small, and the amplitude at the wave amplitude is large resulting in uneven cleaning. Therefore, the best choice for cleaning items should be placed on the amplitude. (More effective range 3-18 cm)
Use of washing basket
When cleaning small items, net baskets are often used. Because meshes cause ultrasonic attenuation, special attention is required. When the frequency is 28khz, it is better to use the mesh above 10mm.
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