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Welding technique that uses the heat generated by ultrasounds to obtain precise, clean and permanent joints. Welding with ultrasounds of plastics to obtain components of high aesthetic value.

  • ultrasonic welding unit
  • ultrasonic welding

Ultrasonic welding uses the heat generated by ultrasounds to weld thermoplastics. It is an efficient and fast welding technique.

Ultrasonic welding employs four devices: the generator, the transformer, the booster and the sonotrode. The generator takes normal electric current and transforms it into ultrasonic electric vibrations, that the converter then transforms into mechanical vibrations. The width of the vibrations is modified by the booster depending on the material to weld. At the end the sonotrode brings the mechanical vibrations to the areas to weld which are already overlapped. The pressure of the sonotrode on the surfaces to weld produces the heat necessary to the melting. The welding is so carried out in a fluid, homogeneous way, without using additives and in considerably short times.

The width of the vibrations is not the only parameter to adjust during the ultrasonic welding. The shape of the sonotrode variates depending on the shape of the welding area. GS Finishing Machines supplies sonotrodes that adapt themselves to the dimensions and shape of the surface to weld.

Thanks to its efficiency and cleanliness, ultrasonic welding is successfully used for the assembly too.

The articles that can be ultrasonic-welded can be produced by means of injection moulding, extrusion moulding, compression moulding, thermoforming, blow moulding, suction 2D/3D (2k) and rotational moulding.

Since it produces precise, clean and resistant joints, ultrasonic welding is suitable for the permanent welding of surfaces that are not wide, particularly for the components with a delicate structure (those that host electronic units, for example) or that have to respect precise aesthetic standards.
Among the articles ultrasonic-welded by the customized machines of GS Finishing Machines there are the following, listed as an example: battery boxes, light housings and various kinds of manifold pipes.


portasensore saldato a ultrasuoni
pedana lavorata con saldatura a ultrasuoni
pedana lavorata con saldatura a ultrasuoni
ultrasonic welded battery box
ultrasonic welded battery box


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