Packaging machine with an ultrasound device

摘要

The machine has ultrasonic device (1) comprising an ultrasonic generator (2) that generates electric vibrations. An ultrasonic converter (3) converts the generated electric vibrations into mechanical vibrations of same frequency. A transformation intermediate piece (4) transfers the mechanical vibrations to a sonotrode (5). The sonotrode comprises a sound-radiating end surface (6) at which the sonotrode reflects the mechanical vibrations, so that a standing wave to be passed into a packaging foil (18) is formed. The end surface is arranged in a vacuum and/or in a modified atmosphere.