Processing Machinery
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Shutdown Management of PLA Products
Problem Phenomenon
Many problems when restarting after shutdown.
Cause Analysis
Holding temperature during shutdown causes PLA to degrade rapidly; degraded material is discharged at restart.; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience; this mechanism has been repeatedly verified by industry literature and should be confirmed first during troubleshooting
Solution
①Clean the barrel before shutdown; ②Lower the holding temperature or empty it; ③Discharge and scrap material at restart; ④Shorten shutdown.; After adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PLA shutdown management must be strict; the degradation speed is faster than conventional materials.; 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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