Thermoforming
3 Aufrufe
Uneven thickness of PET extruded sheet
Problembeschreibung
The transverse thickness of PET extruded sheet fluctuates greatly, thin in the middle and thick on both sides or vice versa, affecting subsequent '2079851475616104458.
Ursachenanalyse
Die lip gap adjustment is improper; melt temperature distribution is uneven, causing viscosity differences; the three-roll calender gaps are not parallel.
Lösung
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.
Wichtigste Erkenntnis
PET sheet thickness uniformity requires coordinated control of multiple links.
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