Molds & Tooling
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POM melt upper limit 210
Problem Phenomenon
To improve filling, the melt temperature was raised to 220°C, and the products discolored with a surge of mold deposit
Cause Analysis
When POM melt exceeds 210°C, degradation accelerates, releasing formaldehyde and forming mold deposit, and the color turns yellow and brown; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Control the melt temperature at 190-210°C; solve filling difficulties by increasing pressure and speed, not by raising temperature; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
210°C is the red line for POM melt, and the cost of exceeding the temperature far outweighs the benefit; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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