Ultrasonic Cleaning

Ultrasonic Cleaning
An ultrasonic cleaner is a cleaning device that uses ultrasound (usually from 20–400 kHz) and an appropriate cleaning medium
(sometimes ordinary tap water) to clean delicate items. The ultrasound can be used with just water, but use of a cleaning
medium (e.g. solvent, degreaser, etc.) appropriate for the item to be cleaned enhances the effect.

Ultrasonic cleaners are used to clean many different types of objects, including jewellery, lenses and other optical parts,
watches, dental and surgical instruments, tools, coins, fountain pens, golf clubs, firearms, industrial parts and electronic
equipment. They are used in many jewellery and watch workshops, and electronic repair workshops.

The Ultrasonic Cleaning Process
Ultrasonic cleaning uses high frequency sound waves to create cavitation bubbles in a liquid. These cavitation bubbles release
energy which have a scrubbing effect on contaminants adhering to substrates like metals, glass, and ceramics. This action
also penetrates blind holes, cracks, and recesses, and is able to thoroughly remove all traces of contamination tightly
adhering or embedded onto solid surfaces.

Water or other cleaning solutions (e.g. solvent, degreaser, etc.) can be used, depending on the type of contamination and the
item to be cleaned. Contaminants can include dust, dirt, oil, pigments, rust, grease, algae, fungus, bacteria, lime scale,
polishing compounds, flux agents, fingerprints, soot wax and mold release agents, blood and other biological material, and
so on.

Ultrasonic cleaning can be used for a wide range of shapes, sizes and materials. There must be sufficient space around the
object in the ultrasonic cleaner so that the cleaning medium can reach all the areas to be cleaned.

An Optimum Ultrasonic Cleaning Frequency
Ultrasonic cleaning systems operate in three frequency ranges: 20 to 40 Khz, 40 to 70 Khz, and 70 to 200 Khz. The system
frequency to use depends on the type of cleaning required. The 20 to 40 Khz cleaning frequency range provides relatively
fast cleaning, and is suited for most industrial applications with large parts having little or no intricate detail. 20 to 40 Khz
systems are good for heavy duty cleaning.

The 40 cleaning frequency range is suited for installations where parts have intricate detail, small orifices, or long tubes
that need cleaning. 40Khz systems typically require more power than 20Khz systems and are slower to clean, but offer
finer cleaning.

The 70 to 200 Khz cleaning frequency range is suited for specialty operations such as the fine, gentle cleaning of optics,
semiconductor wafers and hard-disk-drive components.

The higher the frequency, the gentler the cleaning, while lower frequencies are designed to “scrub” heavily soiled surfaces.

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© 2017-2018  Shenzhen Derui Ultrasonic Equipment Co. Ltd

JOB     SINA