Processing Machinery
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PLA product black specks
Problem Phenomenon
Black specks in products.
Cause Analysis
Carbonized material falls off from dead corners; PLA's heat sensitivity makes it easier to carbonize.; 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 data and should be confirmed first during troubleshooting
Solution
① Thorough cleaning; ② shorten residence; ③ regular disassembly inspection; ④ material management.; 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
PLA has a high black speck risk; machine cleaning frequency must be increased.; after confirming effectiveness, fix 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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