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How Ultrasonic Cleaners Work

Theory of Ultrasonics

Ultrasonic cleaning depends upon cavitation, the rapid formation and violent collapse of minute bubbles or cavities in a cleaning liquid. This agitation by countless small and intense imploding bubbles creates a highly effective scrubbing of both exposed and hidden surfaces of parts immersed in the cleaning solution. As the frequency increases, the number of these cavities also increases but the energy released by each cavity decreases making higher frequencies ideal for small particle removal without substrate damage.

ultrasonic_cleaning_graphic

Growth and collapse (implosion) of a cavitation vacuum bubble

Cavitation is produced by introducing high frequency (ultrasonic), high intensity sound waves into a liquid. Consequently, the three essential components of any ultrasonic cleaning system are: a tank to contain the cleaning liquid, a transducer to convert electrical energy into mechanical energy, and an ultrasonic generator to produce a high frequency electrical signal.

Why an ultrasonic system?
The recognized advantages of ultrasonic cleaning are:

  Precision
Because ultrasonic energy penetrates into crevices and cavities, any type of part or assembly can be cleaned. In many cases ultrasonic cleaning is the only way to meet specifications, as in the cleaning of precision parts or assemblies.
Speed
Ultrasonic cleaning is faster than any conventional cleaning method in the removal of soil and contamination from parts. Entire assemblies can be cleaned without disassembly. Often, its labor saving advantages make ultrasonics the most economical way of cleaning.
Consistency
Unlike manual cleaning, ultrasonics offers unmatched cleaning consistency, whether pieces to be cleaned are large or small, simple or complex, handled singly, in batches, or in an automated line.

Theory of Ultrasonics
Selecting A Cleaning Process And Cleaning Solutions
Three Major Factors To Consider

 

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