Processing Machinery
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PMMA Barrel Temperature Zoning
Problem Phenomenon
PMMA plasticization is uneven, and products carry unmelted particles
Cause Analysis
The barrel temperature gradient is unreasonable, and the compression zone temperature is insufficient; During on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based on experience alone.; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
Set the barrel at rear zone 180℃, middle zone 210℃, front zone 230℃; back pressure 0.3-0.7MPa; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
A reasonable temperature gradient plus low back pressure is the PMMA plasticization benchmark; 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 similar future problems.
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