Injection Moulding & Tooling

Ultrasonic joining of thermoplastic materials is a welding technology that uses mechanical vibrations to generate heat due to molecular friction.

The indispensable component is the sonotrode, which is the welding tool that transmits the vibrations to the component. These vibrations cause the molecules to move in the plastic, which becomes soft and starts to melt. This welds the components together or fits the shape of the joint. After being held under pressure for a short time, they are permanently molecularly bonded.