Material Drying
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PA6 Welding Assembly
Fenómeno del problema
Ultrasonically welded PA6 parts have insufficient weld strength, and the welding surface splashes and flashes
Análisis de la causa
After PA6 absorbs moisture, the moisture at the welding interface vaporizes, forming a loose weld; improper amplitude and pressure parameters cause flash splashing or insufficient fusion; glass fiber orientation also affects welding strength
Solución
①Control part moisture content before welding and weld as soon as possible; ②orthogonally optimize the three parameters of amplitude, pressure, and time; ③design energy directors on the weld line to concentrate energy; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Conclusión clave
Half of the success or failure of PA6 ultrasonic welding lies in moisture content; pre-weld state management plus parameter optimization plus energy director design constitutes a complete solution; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence
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