Thermoforming
4 조회수
Uneven thickness of PET extruded sheet
문제 현상
The transverse thickness of PET extruded sheet fluctuates greatly, thin in the middle and thick on both sides or vice versa, affecting subsequent '2079851475616104458.
원인 분석
Die lip gap adjustment is improper; melt temperature distribution is uneven, causing viscosity differences; the three-roll calender gaps are not parallel.
해결 방법
Precisely adjust die lip bolts, using automatic die lip control; optimize the temperature of each section; calibrate the three-roll gaps and check roll temperature uniformity.
핵심 요약
PET sheet thickness uniformity requires coordinated control of multiple links.
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