Molds & Tooling
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PMMA Mold Temperature 40-80
Problem Phenomenon
PMMA products produced with 30℃ mold temperature have surface flow marks and large internal stress
Cause Analysis
Too-low mold temperature causes the melt front to quench, flow marks freeze and molecular orientation stress is large; 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
Raise mold temperature to 60-80℃; optical parts mold temperature above 70℃; appropriately raise for thick-wall parts; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
PMMA mold temperature is a key variable of surface quality and internal stress; 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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