Extrusion & Post
4 조회수
LLDPE extrusion melt temperature drift
문제 현상
Melt temperature fluctuations cause bubble and thickness fluctuations.
원인 분석
LLDPE shear heating is significant; screw speed fluctuations directly convert into melt temperature fluctuations; temperature control detuning is superimposed.
해결 방법
①Stabilize screw speed; ②PID tuning; ③check heater bands and thermocouples; ④optimize screw configuration to reduce shear heat.
핵심 요약
Melt temperature drift = shear heat + control detuning.
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