Material Drying
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Low ultrasonic welding strength of PET injection molded parts
Fenómeno do problema
The strength of PET injection molded parts after ultrasonic welding is insufficient, and the weld line easily breaks.
Análise das causas
Improper welding parameters (amplitude, energy, time unsuitable); product moisture absorption affects welding; energy director design is poor.
Solução
Optimize welding parameters; dry the products before welding; optimize energy director design (triangular cross-section).
Conclusão principal
PET ultrasonic welding requires dry products and optimized parameters.
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