Functional Description
3-2
Digital Compact
3.1 Ultrasonic Joining of Thermoplastic Resins
The joining of thermoplastic resins using ultrasonics is a process in
which high frequency ultrasonic vibrations are transmitted via a horn to
the parts to be joined applying a defined joining pressure.
The friction in the joint area generates heat which produces a molten
pool between the parts to be joined. When the horn stops vibrating, the
material solidifies resulting in a homogeneous joint.
Fig. 3-1 Functioning principle
Power Supply
Converter
Horn
of the part to be welded
Upper part
Booster
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