Extrusion & Post
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EEA extrusion pelletizing strand sticking
Problembeschreibung
During EEA extrusion pelletizing, pellets stick together, not completely cut, forming bead strings
Ursachenanalyse
EEA is soft, the knife cuts in during pelletizing but elastic recovery makes the cut faces re-bond; pelletizing water temperature too low <40°C, not fully solidified; cutter speed not matching extrusion speed
Lösung
1) Increase pelletizing water temperature to 50-60°C, cut after full solidification; 2) Increase cutter speed to ensure quick cutting; 3) Cutter gap 0.01-0.02mm to ensure clean cutting; 4) Use rotary cutter instead of flat cutting to reduce strand sticking
Wichtigste Erkenntnis
Strand sticking is caused by elastic recovery and low-temperature pelletizing; high-temperature water cutting and fast cutting are the key
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