A reader has asked about the possibility of using ultrasonics to wash dishes. He writes – – – “Ultrasonic cleaning in a dishwashing application is something that I am currently interested in. Having read some of your other blog posts which mention sequential use of turbulation in the liquid to supplement the ultrasonics, I was …
Surface cavitation erosion of ultrasonic transducers is a topic that users and manufacturers of ultrasonic equipment would often rather not talk about – – but we must. The erosion of a transducer surface due to surface cavitation is inevitable over time. Its severity depends on several factors, some of which can be controlled and some …
In the preceding blog I indicated that liquid in process tanks can be heated by the effects of ultrasonics and pumping as well as by surface-mounted or immersion heaters. The fact is that some process tanks may require cooling, not heating, to remain at the desired temperature. Since we have looked at the possible sources …
We all know that temperature is an important parameter in cleaning and cleaning-related processes. Too little and cleaning will be ineffective. Too much can lead to possible chemical separation, part degradation and loss of ultrasonic cavitation. So providing the proper temperature is mandatory for the best cleaning result. Sounds easy? Well, yes and no – consider …
Recently, there has been a lot of attention directed at the new and expanding range of ultrasonic frequencies available in advanced design ultrasonic cleaning equipment. The result has been that there has been a de-emphasis on the “workhorse” frequencies that started it all, 25 and 40kHz. The fact is that the vast majority of industrial ultrasonic cleaning …
Dimensions of orifices and typical contaminant scenarios were discussed in preceding blogs. Today, let’s consider the role of ultrasonics in removing contaminants from orifices. First, we’ll consider the “classic” orifice consisting of a passageway through a solid. Then we’ll talk about some special cases which can have an impact on the ability of ultrasonics and …
The preceding post defined two dimensions of concern when considering cleaning orifices. Before moving on, let’s now consider how the various types of contamination that might be found in an orifice and how each affects the cleaning task. Liquids – Liquids are common contaminants in orifices. Liquid contamination can result from manufacturing operations but also …
A few days ago, one of our customers asked one of our sales people what would seem like a very simple question. The question, in paraphrase, was – – “Do you know the relationship between ultrasonic frequency and the ability of ultrasonics to clean within a certain sized orifice.” Being a bit rushed when I received …
As a leading ultrasonic manufacturer, we are often asked to manufacture large, industrial ultrasonic cleaning systems producing a particular ultrasonic power density based on laboratory trials. In fact, it may not be appropriate to base the watts per gallon requirement for a large industrial application on those found effective on a laboratory scale. A paper at the following …
Blackstone Ultrasonics was founded in the mid 1950’s in the hope that the addition of ultrasonic agitation to a conventional clothes washer would revolutionize laundering of fabrics. It didn’t take long before it was recognized that ultrasonic techniques weren’t going to be effective – at least not by simply adding ultrasonic transducers to a conventional …
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