Extrusion & Post
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POE extrusion pelletizing strand sticking
Fenómeno do problema
During POE extrusion pelletizing, pellets stick together, not completely cut, forming a bead-string shape
Análise das causas
POE 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 extrusion speed
Solução
1) Increase pelletizing water temperature to 50-60°C, cut after full solidification; 2) Increase cutter speed to ensure fast cutting; 3) Cutter gap 0.01-0.02mm to ensure clean cutting; 4) Rotary cutter instead of flat cutting to reduce sticking
Conclusão principal
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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