How to choose an ultrasonic welding machine

Ultrasonic welding is an industrial method where high frequency ultrasonic acoustic vibrations are applied to workpieces that are held together under compression to create a solid state weld. Ultrasonic welding is commonly used for plastics, and especially for joining unrelated materials. In ultrasonic welding, there are no connective rivets, bolts, nails, soldering materials, or adhesives required to fix the materials together.

To determine which size of an ultrasonic welding machine that you need, first consider the size of the parts being welded. 15 kHz welding machines are for large size parts, 20 kHz welders are for medium size parts and 40 kHz welders are for small, delicate parts. The chart below can be used to determine which ultrasonic welding machine to buy based on the length, in inches, of the joints being welded.

If you need further assistance in sizing the correct ultrasonic welding machine, contact Toman ThermoSonics today for additional information.

ULTRASONIC WELDER JOINT LENGTH IN INCHES
40kHz-700watt Up to 10″
20kHz-1,000watt Up to 12″
20kHz-1,500watt Up to 18″
20kHz-2,000watt Up to 24″
20kHz-3,000watt Up to 36″
15kHz-4,000watt Up to 48″

Figures may vary depending on the polymer being welded.