Processing Machinery
2 Aufrufe
PPO Shutdown Temperature Graded Management
Problembeschreibung
【Problem Phenomenon】PPO shutdown durations vary, and product quality fluctuates greatly after restart
Ursachenanalyse
SABIC gives a shutdown grading procedure: maintain barrel temperature within 15 minutes; cool down 50℃ for 15 minutes-2 hours; cool down to 180℃ for 2-12 hours; empty and turn off heating over 12 hours
Lösung
Execute cooling or emptying according to shutdown duration grading; at restart, heat up according to the procedure and confirm melt state; establish shutdown records and restart checklists; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Wichtigste Erkenntnis
PPO shutdown is handled in grades of 15 min/2 h/12 h; proceduralization avoids arbitrary decisions; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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