Extrusion & Post
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PMMA Extrusion Temperature Profile
Problem Phenomenon
Flow marks and thickness fluctuations appear on the surface of PMMA extruded sheets
Cause Analysis
Unreasonable extrusion temperature profile, poor melt uniformity, and unstable die discharge; 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
Extruder barrel gradient 170-250℃; uniform die head temperature; stable melt metering; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
The extrusion temperature profile determines the melt quality of the sheet; 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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