Material Drying
2 Aufrufe
PBT Poor Metering
Problembeschreibung
Product weight fluctuates, metering is unstable, and screw back time is sometimes long and sometimes short
Ursachenanalyse
PBT has good fluidity; unstable back pressure or check valve leakage causes metering fluctuations; changes in the drying state of the pellets affect plasticization; increased screw wear clearance is also a cause; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Lösung
①Set back pressure stably; ②Overhaul the check valve and screw wear; ③Standardize the drying state of the pellets; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability
Wichtigste Erkenntnis
PBT poor metering is investigated along three lines: back pressure, check valve, and drying; equipment wear is a chronic variable; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
War das hilfreich?
0 Personen fanden dies hilfreich
Vielen Dank für Ihr Feedback!