I think the major problem with applying ultrasonics to inection moulding tools is the size and mass of the components. In other applications the tools (sonotrodes) can be custom-designed resonant systems but in injection moulding the physical requirements make this difficult: resistance to heat and high pressure, rigid fixing etc.
You may be interested in some of the work done by MPI ultrasonics - their multi-frequency systems are intended to work around this limitation.
Also, I see that Battelle is working in this field (pity they're not giving much away about how it's done!)
Located in Neuchatel, Switzerland, with partner organisations in Russia and India, Progress Ultrasonics Group develops technology-intensive ultrasonic equipment for oil and gas condensate production, processing and transport.
In trials, oil beds in Russia and Romania demonstrated successful results with an overall average efficiency of 200% oil flow compared to normal (double the flow rate).
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Miodrag Prokic is an independent consultant, developer of new ultrasonics applications (such as ultrasonic cleaning in liquid CO2) and supplier of special ultrasonic systems for cleaning, sonochemistry and other applications. This is the new site I've just built for him, which includes a variety of technical articles and photos of modern ultrasonic cleaning systems.
Re: injection molding
Hello hsadeghian,
I think the major problem with applying ultrasonics to inection moulding tools is the size and mass of the components. In other applications the tools (sonotrodes) can be custom-designed resonant systems but in injection moulding the physical requirements make this difficult: resistance to heat and high pressure, rigid fixing etc.
You may be interested in some of the work done by MPI ultrasonics - their multi-frequency systems are intended to work around this limitation.
Also, I see that Battelle is working in this field (pity they're not giving much away about how it's done!)
Hope this helps.
Chris