Reading Company of the United States uses a new ultrasonic screening system to reduce screen fine powder blockage

Ametek's subsidiary, Reading Alloys Inc. of Robesonia, Pa., said it successfully used the Russell Finex Vibrasonic 2000 screening system to produce very fine titanium and alloy powders for medical implant applications. Reading's plasma spray customers require special particle size distribution powders to produce very fine coatings to help join the bone and implant surfaces.

Reading existing vibrating screens has certain problems in obtaining the necessary particle size distribution, yield, and material recovery. Technical manager Charles Motchenbacher said: "The sieve is very easy to clog, especially when the mesh size is small."

The Vibrasonic system combines ultrasonic and conventional vibratory screening and can be loaded by retrofitting any new or existing vibratory separation/screening equipment. By using an acoustic transducer, the ultrasonic frequency is applied to the mesh hole to reduce the surface tension and the stainless steel wire is frictionless. This eliminates the problem of screen clogging and can be accurately screened to 20 μm.

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