Molds & Tooling
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POM mold fouling deposition
Problembeschreibung
White misty deposits gradually form on the mold cavity surface, the product surface gloss decreases accordingly, and frequent mold wiping is required.
Ursachenanalyse
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
Lösung
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
Wichtigste Erkenntnis
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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