100-412-183 REV. 13 23
2.5 Welding Systems
2.5.1 Principle of Operation
Thermoplastic parts are welded ultrasonically by applying high frequency vibrations to the
parts being assembled. The vibrations, through surface and intermolecular friction,
produce a sharp rise in temperature at the welding interface.
When the temperature is high enough to melt the plastic, there is a flow of material
between the parts. When the vibrations stop, the material solidifies under pressure and a
weld results.
2.5.2 Weld System Applications
DCX S Power Supply weld systems can be used for the following applications:
• Ultrasonic welding
• Cutting and sealing thermoplastic fabric and film
• Staking, spot welding, swaging, and degating thermoplastic parts
• Other ultrasonic processing applications
DCX S Power Supply weld systems typically consist of a power supply operated with a
fixed converter-booster-horn stack.
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