Ultrasonic welding is to convert 50/60 Hz current into 15, 20, 30 or 40 KHz electric energy through the ultrasonic generator; The converted high-frequency electrical energy is converted again through a transducer to a mechanical motion of the same frequency, which is then transmitted to the horn through a set of amplitudes that can be changed.
The horn transfers the vibration energy received to the joint of the piece to be welded, where it is converted into heat by friction, melting the plastic.
In short, Ultrasonic welding is to transmit high frequency vibration wave to the surface of two objects to be welded, under the condition of pressure, make the two objects’ surface friction to form the fusion between molecular layers.
Ultrasonic waves can be used not only to weld hard thermoplastics, but also to process fabrics and films.
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