Hielscher - Ultrasound Technology

The wire and tape cleaning is mainly based on the cavitation created in a fluid by highly intensive ultrasonic waves. Cavitation bubbles increase and subsequently implode within a very short time. The implosion results in high pressures and temperatures and in liquid jet streams with up to 400km/h. The jets hit against the surface of the wire and remove the impurities.
The wire cleaning system is based on following principles:
1. High cavitation power is an important factor for efficient cleaning. This is achieved by concentrating the ultrasonic waves in a sonotrode with a narrow cylindrical borehole flushed with liquid. The resulting sonic intensity is up to 50 times higher than in ultrasonic baths and causes an enormous cavitation density. This provides an extraordinary cleaning effect on the surface of the wire being leaded through the borehole. The system also allows high wire speed and inline processing.
2. The liquid, which immediately removes the contamination, is continuously circulating and purified. Therefore, the clean surface does not get polluted again. These two advantageous features are applied both in the cleaning and in the rinsing process.