Extrusion & Post
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Severe EEA extruder screw wear
Fenómeno del problema
After 200h of EEA extrusion, screw and barrel wear reaches 0.5mm
Análisis de la causa
Filler causes large wear on the screw; insufficient screw material hardness, not nitrided; processing temperature too high causing EEA to adhere to the screw and aggravate wear
Solución
1) Use nitrided screw or bimetallic screw SK-2 alloy; 2) Reduce processing temperature to reduce adhesive wear; 3) Treat filler with coupling agent to reduce friction; 4) Regularly check wear, replace in time when >0.3mm
Conclusión clave
Screw wear is caused by filler friction and adhesion; wear-resistant screw and temperature control are the key
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