Extrusion & Post
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Severe Screw Wear of CMC Extruder
Fenómeno do problema
After 200h of CMC extrusion, the wear of screw and barrel reaches 0.5mm
Análise das causas
Filler causes large wear on the screw; screw material hardness is insufficient and not nitrided; high processing temperature causes CMC to adhere to the screw and aggravate wear
Solução
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 and replace in time when >0.3mm
Conclusão principal
Screw wear is caused by filler friction and adhesion; wear-resistant screw and temperature control are the key
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