Ultrasonic welding uses high-frequency vibration waves to transmit to the surfaces of two objects to be welded. Under pressure, the surfaces of the two objects are rubbed against each other to form fusion between the molecular layers.

Ultrasonic welding needs to include ultrasonic generators, converters, boosters, welding tools and other components.

1) The welding head presses the plastic surface

2) The welding head vibrates 20,000 to 40,000 times per second

3) Vibration generates frictional heat to melt and bond the material

Ultrasonic welding generally requires the fusion interface to be small and the contact surface to be uniform. The interface design depends on factors such as the material to be welded, the shape of the weldment, and the requirements of the weldment.

Ultrasonic welding is a fast, strong, clean and reliable joining process for plastics and metals. For the linking of thermoplastic films and plates, most metals can be ultrasonically welded.