Ultrasonic welding consists of a fusion process of ultrasonic frequency mechanical vibration between the sonotrode/horn and the localized surface to be welded.
The 50/60Hz frequency network is converted and amplified by the ultrasonic generator turning the electrical signal into energy through the transducer/converter.
This energy applied to the acoustical group must be supplied in sufficient quantity to overcome the inertial mass movements and friction between the parts to be welded.
The advantages of ultrasonic welding technology are numerous:
The ultrasonic technology is one of the safest, more efficient and faster method to join thermoplastic material.
The welding timing is around milliseconds and it is possible to weld printed materials and thermoplastic fabrics.
To reduce the friction areas that don’t allow easily the welding process, it is recommended to create on the plastic materials small geometric protuberances called energy directors. To select and choose the best geometry of the energy directors It is possible to see here under some examples; in any case Sonomax is at disposal to offer the experience and the technical knowledge.
Here are some examples to choose the best geometry.
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