Processing Machinery
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PPO Barrel Zone Temperature Setting
Problem Phenomenon
【Problem Phenomenon】PPO barrel temperature settings jump greatly, plasticization is uneven and melt temperature is scattered
Cause Analysis
SABIC general NORYL zones are: rear 250-270℃, middle 270-290℃, front 280-300℃, nozzle 280-300℃, hopper 60-80℃; progressive heating ensures plasticizing quality
Solution
Set zone temperatures progressively from low at the rear to high at the front; hopper 60-80℃ to prevent bridging; measure actual melt temperature to calibrate zone settings; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
PPO barrel progressive heating from 250 to 300℃, hopper 60-80℃ prevents bridging; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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