Processing Machinery
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PPO High-Temperature Grade Temperature Upper Limit
Problem Phenomenon
【Problem Phenomenon】After raising the temperature of high heat-resistant NORYL grades, there is worry about degradation, and the window is not accurately grasped
Cause Analysis
High-temperature grades such as FExxxxPW have melt 290-320℃ and barrel front 300-310℃; high PPO content grades allow a higher temperature window, but the upper limit of each zone must be executed according to the table
Solution
Set high-temperature grades according to the data sheet at 290-320℃; each zone temperature must not exceed the listed upper limits; manage residence time correspondingly stricter; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
High-temperature PPO grades can reach 320℃, but the upper limits of each zone must not be exceeded according to the table; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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