Extrusion & Post
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Severe screw wear of EAA extruder
Problembeschreibung
After 200h of EAA extrusion, the wear of the screw and barrel reaches 0.5mm
Ursachenanalyse
The filler causes large wear on the screw; the screw material hardness is insufficient, not nitrided; high processing temperature causes EAA to adhere to the screw and aggravate wear
Lösung
1) Use nitrided screws or bimetallic screws of SK-2 alloy; 2) Lower the processing temperature to reduce adhesive wear; 3) Treat the filler with a coupling agent to reduce friction; 4) Regularly check the wear, replace in time when >0.3mm
Wichtigste Erkenntnis
Screw wear is caused by filler friction and adhesion; wear-resistant screws and temperature control are the key
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