Material Drying
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PA6 Ultrasonic Welding Strength
Fenómeno del problema
After ultrasonic welding of PA6 housings, the weld strength is insufficient, cracking in drop tests
Análisis de la causa
PA6 moisture content fluctuations affect welding energy transfer and melting behavior, and the welding interface of dry material melts unevenly; welding parameters are not optimized for the material state; during on-site troubleshooting, verify item by item according to this mechanism, avoiding blind machine adjustment based only on experience
Solución
Unify the material conditioning state before welding; optimize welding amplitude, pressure and time; design energy directors to ensure energy concentration; verify weld strength by both drop and tensile tests
Conclusión clave
PA6 welding quality is strongly related to moisture state, and unified material state is the premise; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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