Processing Machinery
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Material Changeover and Cleaning of PLA Products
Fenómeno del problema
Contamination and degradation after material changeover.
Análisis de la causa
Cross-contamination of PLA with other materials; residual old material carbonizes at high temperature.; 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
Solución
①Thorough cleaning; ②Low-temperature purging material; ③Verify the first article; ④Record the process.; After adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes, making it easier to identify effective measures
Conclusión clave
PLA material changeover must prevent cross-contamination.; 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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