Processing Machinery
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PMMA welding strength
Problem Phenomenon
Weld seams are brittle after PMMA ultrasonic welding
Cause Analysis
PMMA has a narrow welding window, and improper energy embrittles the weld zone; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry literature and should be confirmed first during troubleshooting
Solution
Finely calibrate welding parameters; energy director design; post-weld annealing; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Key Takeaway
PMMA welding requires precise parameter adjustment plus post-treatment; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future
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