Processing Machinery
8 조회수
PETG product black or dark lines
문제 현상
Black or dark linear stripes appear inside the product.
원인 분석
The barrel or screw has carbon deposits falling off and mixing into the melt, and a certain temperature zone overheats causing local degradation.
해결 방법
Clean the barrel and screw to remove carbon deposits; check the accuracy of each temperature zone; use purging compound for regular machine cleaning.
핵심 요약
PETG black lines point to carbon deposits or local degradation.
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