Ultrasonic welding cleaner is widely used in both household or industrial applications. It has many advantages such as labor cost-saving, eco-friendly, higher efficiency, etc. K&M tech provides the equipment for your ultrasonic cleaning needs.

Principles of ultrasonic cleaning machine

By using the liquid cavitation, acceleration, and direct inflow action, the ultrasound impacts directly or indirectly on the filth inside the liquid and reaches the cleaning purpose by dispersing, emulsifying, or peeling off the filthy layer. The cavitation and direct inflow function are more often applied in the currently used ultrasonic cleaning machines. Cavitation function refers to the phenomenon of the rapid formation and inner implosion of the countless air bubbles inside the cleaning reagent. The blast waves generated thereafter wash away or peel off the dirt on the inside or the surface of the workpieces soaking under the cleaning liquid. As the ultrasound frequency increases, the bubbles number increases and the blast force weakens, Therefore, high-frequency ultrasound is especially suitable for the cleaning of small particles without damaging the surface of the workpiece.

Application of ultrasonic cleaning machine

The ultrasound has a very wide application-surface cleaning. For instance, the ultrasound causes vibration of water molecules as it transmits inside the water, If the ultrasonic power is big enough, it could rip the water molecules into an empty hole(cavitation core), inside the empty hole, there forms a vacuum space or space closes to the vacuum. In the enlarging process of the empty hole, it will blast suddenly as its peripheral pressure keeps increasing, the water molecules collide fiercely so that thousands of shock waves will be generated and wash the dirt off the object's surface. Those numerous tiny dense bubbles turning into shock waves process is called as “cavitation effect”.

Generally speaking, the industrial ultrasonic cleaner involves a special cleaning process, so it has more strict requirements such as degerming and anticorrosion function. Therefore, the tank in the ultrasonic cleaning system is normally used with stainless material and equipped with an independent control box to adjust the temperature and cleaning time.

28kHz & 40kHz frequency application

For the cleaning of objects like hardware, mechanical objects, motorcycles, compressors, etc. 28kHz are often used.

For the optical photoelectron and circuit board cleaning, 40kHz is often used. The lower the frequency, the more easily cavitation occurs. Moreover, at low frequencies, the liquid is compressed and sparse at longer time intervals, the bubble will increase to a larger size, and the cavitation is strengthened so as to have a better cleaning result. So low-frequency ultrasonic cleaning is suitable for large parts surface cleaning. At a frequency of about 40 kHz, more cavitation bubbles are generated at the same sound intensity than at a frequency of 28 kHz with stronger penetration. So, it is suitable to clean workpieces with complicated shapes or with blind holes.

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How to choose the frequency of the ultrasonic cleaner?

The ultrasonic cavitation threshold value is closely connected with its frequency. Higher frequency comes with a higher threshold value and vice versa. The lower the cavitation threshold value, the more likely the cavitation is to occur. At the low frequencies, the interval time between the compression and sparsity of the liquid is longer so that the bubbles could grow to a larger size and enhance the cavitation strength, which is good for the cleaning. Therefore, the low-frequency ultrasonic cleaning equipment is often used in the cleaning of workpieces with large surfaces, or the surface of the workpieces is disdained seriously, which might damage or corrode the surface of the workpieces. So, it is inappropriate to use a low-frequency cleaner to wash the workpieces with high demanding surface finishing. Moreover, low frequency creates more noise. In the meanwhile, high-frequency ultrasound is more penetrating, which is suitable to clean the surface of the workpiece that is more complicated and has more blind holes or has stricter requirements on the surface.

On the other hand, the high-frequency ultrasound creates less noise so it is suitable for the cleaning of some small and high precision spare parts such as electronics, miniature bearing processing or magnetic material, etc. For some special workpieces like integrated circuit chips and silicon slices with coated membrane, the ultrasound with an even higher frequency would be a better choice. For some large workpieces such as automobile engines, valves, lower-frequency ultrasound could be applied. Normally the applicable frequency is within the range of 20-130kHz considering its effect and cost.

This brings us a question, what aspects should be we pay attention to before purchasing one specific ultrasonic cleaner that perfectly suits your needs?

1. Know well of your workpieces: the workpieces material, structure, shape, size, your cleaning quantity needs, cleaning result, and the procedure after the cleaning should be well known by you.

2. Dirt or filth to be cleaned: to be clear of the workpieces' oil or stain types such as ram drawing oil, polishing wax, carbon deposit, dust, fingerprint, etc.

3. Cleaning process: choose an appropriate cleaning process according to the attribution of the workpieces and stain condition, you could consult the equipment supplier for the suggestion. The cleaning process is a very important step before manufacturing the machine. It must be well chosen for it will have a long-term cleaning effect in the future.

4. Manual, semi-manual, or automatic mode: manual mode is usually suitable to wash small quantity workpieces with simple operation. The semi-manual mode could be used to clean large or heavy workpieces with middle or large quantities, this could reduce labor cost and enhance cleaning efficiency. Automatic mode is suitable to clean large quantity workpieces with stable and good cleaning results, but it requires a higher budget also. Users could choose the right model according to their own budget situation and other factors.

5. Cleaning tank size: the size depends on the workpieces cleaning quantity, structure, cleaning time, which means that a certain quantity of workpieces needs to be cleaned at a specific time. This could be calculated easily per your own cleaning requirements.

6. Ultrasonic power and frequency: the cleaning agents are long-term-used consumables. The Cleaning agents are divided into organic solvents and water-based cleaning agents. The choice of the cleaning agents is decided by the workpiece’s material and stain condition. The general principle is that the dirt can be cleaned quickly and thoroughly, and the appearance of the workpiece could remain basically undamaged.

In simple words:

1. First get to know about your cleaning purpose and the best way to clean your products

2. Decide your cleaning quantity so as to choose the corresponding power and volume

3. Know about the cleaning process-consult the equipment supplier

4. choose the most appropriate supplier by making a comprehensive comparison of price, cleaning process, and after-sale service, etc.

Of course, K&M tech always welcomes inquires all over the world.

Our products: 

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Thanks to our diligent factory workers and warehouse helper, high quality production,strict test brefore leaving factory, sound wood packaging and timely delivery are guaranteed for the ultrasonic food cutting machine.Now the cutting machine is on its way to our precious client.

Thanks to the stable quality of our digital ultrasonic welding systems and professional service, on 28th Sep 2022, K&M tech arranged the delivery of our ultrasonic welding systems(digital ultrasonic generator (KM-QD series),high power ultrasonic transducers and titanium welding sonotrodes) to the precious client in America this year. 

Our workers carefully pack each package, and pack them neatly, transport them into the container, and fix their positions with wooden boards to prevent the sea transportation bumpiness.

Now the systems are heading to the client in America now.