Ultrasonic “Double Boiler”

Maximum ultrasonic performance requires the most efficient transfer of ultrasonic vibrations from the ultrasonic transducers to the liquid in the process tank.  This is generally accomplished by applying ultrasonic transducers directly to the exterior surfaces of a tank containing the process liquid.  Transducer attachment techniques favor attachment to metals like stainless steel.  What if the chemistry to be used …

Cleaning Sintered or Porous Parts

Most surfaces that we encounter in industrial cleaning are relatively smooth and contiguous.  We have talked earlier about the difficulties of cleaning blind holes, threads, capillary spaces and other challenging configurations. The one surface we haven’t yet explored is that of a material that is itself porous.  Sintered materials including metal, ceramic, glass, plastic and …

Three Phase Power – Why and How

Three phase power is commonly used where large amounts of electrical power are required.  Examples are power transmission lines and large industrial machines which require considerable power.  What is three phase power anyway? Let’s start by thinking of a two wire transmission line as shown below connecting the source of alternating current power to the …

Ultrasonic “Shadowing”

We in the ultrasonics industry have long been aware of an effect which is sometimes called “ultrasonic shadowing.”  In general, this is what happens when parts being cleaned are positioned in such a way that parts cast an “ultrasonic shadow” which prevents parts in the shadow from being effectively cleaned.  This phenomenon, although we know …

Ultrasonic Performance – Ceramic Ring Test – Post Script

I usually try to make sure I’ve done my research prior to posting a blog.  As I was thinking about the post about the ceramic ring test, however, it occurred to me that there are a couple of variables that I had not previously considered – – the pencil and the means of applying the markings to the …