Ultrasonic welding tool, for welding plastics film materials, has air outflow openings at the anvil laying surface to indicate when a workpiece is incorrectly positioned

摘要

The ultrasonic welding tool (10) has an ultrasonic sonotrode (16) and an anvil (18) to take a workpiece (12) between them, especially of plastics. The anvil has a laying surface (22) for the workpiece, with at least one air outflow opening (28), linked to a sensor. The air outflow openings are directly adjacent to a welded surface or cutting edge.