Processing Machinery
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PMMA Poor Ultrasonic Welding
Problem Phenomenon
Ultrasonic weld has insufficient strength or flash, and appearance is damaged.
Cause Analysis
Welding parameters do not match the energy director design; PMMA has high rigidity and different vibration transmission characteristics, and copying parameters from other materials easily fails.; During on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based on experience alone.
Solution
①Optimize energy director design; ②tune welding energy and time; ③control welding pressure; ④perform welding strength verification.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
PMMA welding requires dedicated parameter development; matching of energy director and energy is the quality key.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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