Material Drying
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Low ultrasonic welding strength of PET injection molded parts
Problem Phenomenon
The strength of PET injection molded parts after ultrasonic welding is insufficient, and the weld line easily breaks.
Cause Analysis
Improper welding parameters (amplitude, energy, time unsuitable); product moisture absorption affects welding; energy director design is poor.
Solution
Optimize welding parameters; dry the products before welding; optimize energy director design (triangular cross-section).
Key Takeaway
PET ultrasonic welding requires dry products and optimized parameters.
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