Injection Molding
6 조회수
POM Mold Deposit
문제 현상
White deposits gradually accumulate on the mold cavity surface, and scratches and uneven gloss appear on the part surface
원인 분석
During POM processing, low-molecular substances and degradation products volatilize and then condense on the mold surface to form mold deposit; excessive melt temperature, excessive injection rate, and poor venting all aggravate deposition
해결 방법
①Reduce injection filling rate and melt temperature; ②enlarge the gate and improve venting; ③clean the mold surface regularly, and in severe cases use hopper drying to improve thermal stability; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
핵심 요약
Mold deposit is POM's signature chronic disease; address temperature, rate, and venting simultaneously, combined with regular mold cleaning to maintain surface quality; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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