Requirements For Cleaning
The basic requirements for cleaning must first be considered before the theory of ultrasonics. Whether you are cleaning your hands, dishes, laundry, or a precision part of a microprocessor or space shuttle, the basics of cleaning are the same:
When cleaning anything, a chemical (ex: ivory soap on your hands) that will dissolve or work at the soil to be removed must be used.
Appropriate temperature (ex: using hot water when washing hands) that is necessary to enable the above chemical to work. Almost all cleaning chemicals are enhanced by elevated temperature.
Some mechanical means (ex: rubbing your hands in a sink) is needed to move the chemical over, around, and inside the soiled part. To speed the above process, ultrasonics provides the fastest, most vigorous scrubbing known. It will scrub inside crevices and places no other mechanical scrubbing can reach.
Theory of Ultrasonic Cleaning
Ultrasonics is the scrubbing part of the above cleaning process. 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 cleaning delicate items without substrate damage. However, lower frequencies scrub harder and are most suitable for items not prone to damage. As frequencies increase, the amount of energy lost as heat in the liquid also increases, thus higher frequencies are less efficient. Most cleaning is done best in the 20 to 60 KHZ range.
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. The system must also have sufficient power to reach the threshold of cavitation.
Why an Ultrasonic System?
The recognized advantages of ultrasonic cleaning are:
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.
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.
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.
Why purchase one from Alexy Ultrasonics Corp.?
The main benefits of purchasing a system from us are:
Our extensive experience in this industry will help you choose exactly what size, frequency, and type of unit your specific application will require. We have done almost everything possible with ultrasonics, and we likely have helped someone clean the same thing that you need to clean. Contact us with your specific criteria and/or questions.
We warranty everything we sell for one year, because we are confident that our rebuilding process is just as good as the original manufacturer. Often, we improve equipment we rebuild so it will last longer than a new unit. We maintain parts and service for everything we sell.
Our units are as good as new, at a fraction of the price. Please contact us to see how much money you can save.