9. Glossary

Plastic plates, sheets or film

In the field of plastics, thin materials are referred to as :

• films if less than 0.5 mm;

• sheets with thicknesses between 0.5 and 2.5 mm;

• plates for thicknesses over 2.5 mm.

Machine duty cycle

Ratio between operating time and ultrasonic start-up time (maximum power used during this period).

This is an important factor in determining your machine's suitability for welding highly ductile materials, large weld areas and/or very short cycle times.

Ultrasonic machine manufacturers do not use this factor in their sales literature.

This is the criterion of choice when purchasing a welding unit...