Ultrasonic welding consists of a process of mechanical vibration at ultrasonic frequency where the contact zone between the sonotrode and the part to be welded undergoes local fusion.
The 50/60Hz mains frequency is transformed and amplified by the ultrasonic generator as an electrical signal and converted by the piezoelectric transducer into movement energy.
This energy supplied by the generator and applied to the acoustic assembly must be sufficient to overcome the inertial moments of the masses to be set in motion and the friction between the parts.
The advantages of advanced technology such as ultrasonic welding are numerous:
Ultrasonic welding is one of the safest, most effective and fastest methods of joining thermoplastic materials.
The welding time is around milliseconds and it is possible to weld moulded parts and thermoplastic fabrics.
In order to reduce the areas of friction between the parts, which make it difficult to initiate the melting process, it is advisable to create geometric protuberances on the parts themselves, known as energy directors, which allow the material to be melted over a relatively small area.
In order to choose the most suitable energy director geometry for your application, we list some examples below and in any case we are available to offer our experience and technical knowledge.
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