Processing Machinery
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PMMA Workshop Cleanliness
Problem Phenomenon
Black specks and impurities frequently appear on the surface of PMMA optical parts
Cause Analysis
Workshop dust adheres to the surface of pellets under the action of static electricity and enters the products with the melt; 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
Cleanliness management of the optical parts workshop; cover the hopper; remove static electricity with ionized air; 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
Preventing impurities on optical parts requires a clean workshop plus anti-static measures; 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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