Extrusion & Post
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Connected pellets in EAA extrusion pelletizing
Problembeschreibung
During EAA extrusion pelletizing, the pellets are connected to each other, not completely cut, forming a bead-string shape
Ursachenanalyse
EAA is soft, the cutter cuts in during pelletizing but elastic recovery makes the cut surfaces re-adhere; pelletizing water temperature too low <40°C, not fully solidified; cutter speed does not match the extrusion speed
Lösung
1) Raise the pelletizing water temperature to 50-60°C, cut after full solidification; 2) Increase the cutter speed to ensure fast cutting; 3) Set the cutter clearance to 0.01-0.02mm to ensure clean cutting; 4) Use a rotary cutter instead of flat cutting to reduce connected pellets
Wichtigste Erkenntnis
Connected pellets are caused by elastic recovery and low-temperature pelletizing; high-temperature water cutting and fast cutting are the key
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