Ultrasonic Welding

Ultrasonic welding, either riveting or direct welding, is a welding technique whereby workpieces are joined together by means of heat generated by a high-frequency mechanical motion.When riveting, only one of the components melts: the other may not even be thermoplastic. In direct welding the energy produced by the sonotrode vibration is transmitted to both parts to be welded given the appropriate pressure, time and stroke. The heat generated melts the thermoplastic workpieces in the intended contact zone . Hence, a cohesive weld is obtained between compatible materials.In both cases the welding process is achieved through a precise and rigorous control of the energy applied.



Ultrasonic welding machines in 2 different versions.

Sound-proof cabin: The new standard cabin with operator panel incorporated in the upper part combines design with functionality. Sound-proofed to remain within legal noise limits, the welding cycle can be seen through the transparent door with automatic safety closure.

Special machines: These machines are designed to obtain welding with multiple heads and various stations to adapt to the customer’s requirements and specifications and to optimize cycle time, dimensions or loading/unloading modalities, paying special attention to ergonomics and operator safety.

In both versions it is possible to save process data on file: forces, times, strokes and power of each separate welding operation to enable traceability


Sound-proof cabin: interchangeable equipment with binary code for automatic recognition of the equipment and set-up parameters. Transparent film dispenser to prevent unsightly damage in the welding zone

Special machines: specific equipment or interchangeable and coded equipment. Cooling system and depth control of each sonotrode. Recognition of part presence and consistency with bar code/QR code.

In all cases the placements have a finish and covering to avoid any aesthetic damage to the parts. Suction caps, pneumatic clamps and sensors for correct positioning of the part when placing.


  • This type of welding ensures assembly with a reduced cycle time, affordable price and traceability.
  • Possibility to weld parts of different dimensions with weld spots distributed over the joining zone.