Molds & Tooling
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POM mold fouling deposition
Problem Phenomenon
White misty deposits gradually form on the mold cavity surface, the product surface gloss decreases accordingly, and frequent mold wiping is required.
Cause Analysis
Low-molecular substances and additives in POM precipitate and deposit on the mold surface, and precipitation accelerates when the processing temperature is high; condensation of decomposition gas during shutdown also aggravates mold fouling.; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
①Control the melt temperature not too high; ②regularly wipe the mold with a special cleaning agent; ③shorten shutdown heat preservation time; ④evaluate switching to a low-precipitation grade.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Mold fouling is a typical mold contamination in POM processing; combine temperature control with regular cleaning, and reduce precipitates at the material grade level when necessary.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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