Material Drying
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PMMA Drying Records
Problem Phenomenon
When tracing a bubble problem, no drying data is available
Cause Analysis
Drying operations are not recorded, so the drying state of the problem batch cannot be restored; 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
Establish drying batch records: temperature, time, and moisture content sampling inspection; associate with product batch numbers; after adjustment, take samples continuously 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
Drying records are the basis for traceability of optical parts; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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