FAQ Kategorien

Ultrasonic technology

Are Amsonic cleaning systems only equipped with private brand ultrasonic components?

Amsonic can supply the correct ultrasonic components (generators and immersible transducers etc), designed specifically for your machine based on many years of experience. Furthermore, Amsonic can supply the same for other makes of machine Amsonic represent the world-wide organisation of Branson in Europe.

What type of ultrasonic generators does Amsonic recommend for ultrasonic cleaning?

Without appropriate cleaning tests carried out in our applications laboratory, no concluding decision can be made. Generally, due to economical reasons, PZT elements are used for small baths of up to 75 litres. For baths with a contents of more than 100 litres, ultrasonic bars are preferable.

What is cavitation?

Cavitation is the rapid formation and collapse of millions of tiny bubbles (or cavities) in a liquid. Cavitation is produced by the alternating high and low pressure waves generated by a high frequency (ultrasonic) sound. During the low pressure phase, these bubbles grow from microscopic size until, during the high pressure phase they are compressed and implode.

What is "degassing" and why should it be done?

Degassing is the initial removal of gases present in the solution. Useful cavitation occurs after gases have been removed from the cleaning solution, leaving a vacuum in the formed bubble. When the high pressure wave hits the bubble wall, the bubble collapses: it is the energy released by this collapse that will assist a detergent or solvent in breaking the bonds between parts and their soiling.

How do I achieve the best results with ultrasonic cleaning?

There are many factors that influence an ultrasonic cleaning process; successful cleaning is only possible if these factors are optimised. The most important and influential parameters are amongst others, the choice of the right cleaning medium, the correct temperature, the correct length of the cleaning cycle, the use of the appropriate cleaning basket and the choice and size of the correct ultrasonic generator.

Can ultrasonic cleaning damage the parts to be cleaned?

Applying the right technologies and with certain cautions, ultrasonics is a safe way of cleaning. While the effect of thousands of implosions per second is powerful, the cleaning process is safe because the energy is localised at the microscopic level. The most important consideration here is the choice of cleaning chemical. Potentially the adverse effects of the detergent on the material being cleaned can be enhanced by the ultrasonics. Ultrasonic cleaning is not recommended for certain gemstones or some crystals used for Computers.

How does one know, if the cleaning solution is "cavitating" properly?

Unsatisfactory cleaning results are often the consequence of badly optimised process parameters (f. ex. wrong choice of detergent, wrong cleaning temperature or too short cleaning cycle). Should you however suspect that the cleaning solution is cavitating badly or not cavitating at all, you can check by performing either the glass slide test or the foil test.

How is the glass slide test performed?

Wet both sides of a glass slide with tap water and from corner to corner, draw a cross onto it with a no. 2 pencil. Make sure the detergent has been filled up to the correct le-
vel, immerse the slide into the fresh, degassed cleaning solution. Switch on the ultra-
sonics. The cross should almost immediately start to disappear and should be totally gone within 15 seconds.

How do I perform the foil test?

Cut a piece of cooking foil say 2 inches square and suspend in fresh cleaning solution that has been degassed and at normal temperature. The foil should show signs of attack after 30 seconds to one minute.

Why is it necessary to place the parts to be ultrasonically cleaned in a cleaning basket?

Items to be cleaned should never be placed directly on the base of the cleaning tank. Transducer elements (that produce the ultrasonics) are bonded to the base of the tank or the face of a transducer box. Items resting on these faces can damage the elements and/or reduce cavitation. Additionally, the basket or carrier will also help by positioning the items within the optimal cleaning zone of the tank.

What is the optimal ultrasonic cleaning temperature?

Heat usually enhances and speeds up the cleaning action in ultrasonic baths. Most detergent suppliers specify an operating range for their specific product. The best way to find out the optimal temperature for the fastest and safest cleaning cycle is to run tests. Most cleaning detergents work in the 50-60°C range.

Can I leave the ultrasonics switched on constantly?

If you have a bench top unit then you should avoid leaving it on when not in use. Always be careful to keep it topped up to the mark as solution levels can drop with evaporation and drag out. If you have an industrial model it is less important but we recommend to switch on only when required.

What is the principal of ultrasonic cleaning?

An ultrasonic generator produces an alternating voltage to a ceramic disc sandwiched in the transducers bonded to the base of a tank. This electrical energy is then converted to a mechanical energy as the ceramic expands and contracts causing the tank base to vibrate at a very high frequency. This sends a sound wave through the solution which creates cavitation (millions of small implosions) which acts as a scrubbing brush on the surface of the components being cleaned.

News:

Amsonic Hamo Germany invests in a Mühldorf branch

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