Ultrasonic unit to thermo-fix and/or polish woven and/or fiber strip materials, for motor vehicle safety belts, has a passage opening between the sonotrode and anvil with an exit width equal to the workpiece final width

摘要

The assembly (1) to thermo-fix and/or polish the woven and/or fiber structure of a workpiece (W) has an ultrasonic unit (2) to generate the required energy. At least one sonotrode (3) is at one side of the workpiece, with an anvil or a second sonotrode at the other side. The workpiece travels (V) through the gap (S) between them. The anvil or the second electrode has an opening with an exit width equal to the final workpiece width.