Ultrasonic Riveting

Ultrasonic riveting is suitable for the positive joining of thermoplastics together or to non-plastics.

The main difference between ultrasonic welding and ultrasonic riveting lies in the fact that when riveting melting deformation occurs and only one of the two joining sections is plasticised. This makes it possible to join any thermoplastics that are not polymer compatible to each other or to non-plastics. As a result, the riveted joins are almost free from play, because the cold riveting tool allows the fused rivet head to cool under pressure.

Whilst the cycle times for ultrasonic riveting are greater than for surface welding, several riveting actions can be performed simultaneously with one sonotrode. Like ultrasonic welding, ultrasonic riveting is also very efficient and at the same time saves energy.

The technology is used mainly where fusion welding is impossible, where metal parts are to be inserted into plastic casings or where the join is not subsequently visible. SONOTRONIC designs and manufactures standard and special machines for riveting interior trims, bumpers or airbag components, particularly for the automotive industry. Ultrasonic riveting is also successfully used in the manufacture of all types of casings, household goods, electronic consumer goods and toys.