Extrusion & Post
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EMA Extruder Severe Screw Wear
Fenómeno do problema
After 200h of EMA extrusion, the wear of the screw and barrel reaches 0.5mm
Análise das causas
Filler causes large wear on the screw; screw material hardness insufficient, not nitrided; processing temperature high, causing EMA to adhere to the screw and aggravate wear
Solução
1) Use nitrided screws or bimetallic screws of SK-2 alloy; 2) Lower 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
Conclusão principal
Screw wear is caused by filler friction and adhesion; wear-resistant screws and temperature control are key
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