Spin or friction welding

The welding of thermoplastic materials using spin welding occurs as the result of the melting of the contact surfaces.
The increase in the local temperature necessary for the melting  process is obtained through the rubbing of one of the two pieces to be welded. The rotating part is subjected to a thrust pressure so as maintain contact between the parts during the process.
In these spin welders, the rotary movement is generated by means of specially controlled motor and with a spindle which has the shape of the part to be welded.

This technology makes it possible to weld parts made of thermoplastic material with round shape only.

The parts to be welded are accommodated inside specially shaped fixturings. Once the material melting temperature is reached, the circular movement must cease within 0.5 seconds.

Our spin welders, are equipped with microprocessor for the control and management of the welding cycle.

Programs are available for time and height settings, with torque and stop angle control.
Programming is simple and intuitive and the various menus are displayed by following simple instructions.

The production of standard welding machines, has allowed us to achieve a high degree of welding quality and reliability.
It is possible to develop special welding machines according to the specific needs and requirements of the client.
Our spin welders are equipped with proportional valve for thrust pressure control. In this technology the weld joint must be designed according to the specific technical requirements of the client.

Sales of our plastic material welders is undertaken by our in-house sales department and is directly managed by Sirius Electric Vigevano.


Il giunto di saldatura è sempre importante e deve essere progettato secondo le caratteristiche del pezzo da saldare.

The weld joint is always crucial and needs to be designed according to the specific features of the part to be welded.

Il processo di saldatura a rotofrizione è semplice.

Spin welding is a simple process
The rotary motion to which one of the two parts to be welded is subjected creates intense friction. The circular motion continues, melting begins and is maintained for a certain amount of time. At the end of this stage the motor is stopped and the spin welding process ends. The parts continue to be kept under pressure for the finalization of the assembly process.


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Sirius Electric S.r.l.
Via Mastronardi 6/b
27029 Vigevano (PV) Italy
Tel. +39 0381 32.56.10 - 31.25.22
Fax +39 0381 23.987
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