Molds & Tooling
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POM mold deposits (mold fouling)
Problem Phenomenon
After continuous production, waxy/powdery deposits appear on the mold surface, and the product surface is scratched and loses gloss.
Cause Analysis
During POM processing, escaping gases and low-molecular substances condense and deposit on the mold surface; deposition accelerates during high-speed production, poor venting, and high melt temperature.
Solution
①Regularly clean the mold surface; ②ensure unobstructed venting and improve venting capacity; ③control the melt temperature within the recommended range; ④record the cleaning cycle and include it in maintenance.
Key Takeaway
POM mold fouling = a high-frequency maintenance item, and venting is the line of defense.
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