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Sonics & Materials Inc. of Newtown, Conn., has added a 30 kilohertz model to its line of handheld ultrasonic plastic welding equipment. The other existing sizes are 20 and 40 kHz. All the hand welders ...

UItrasonic welding is a method of joining two parts by converting electrical energy into heat energy by high frequency mechanical vibration and is suitable for plastics and metals. One part of the ...