Extrusion & Post
12 مشاهدة
Severe Screw Wear of PU Extruder
ظاهرة المشكلة
After 200h of PU extrusion, screw and barrel wear reaches 0.5mm
تحليل الأسباب
Filler causes large wear on the screw; screw material hardness insufficient, not nitrided; processing temperature too high causing PU to adhere to the screw, aggravating wear
الحل
1) Use nitrided screw or bimetallic screw SK-2 alloy; 2) Reduce processing temperature to decrease adhesive wear; 3) Treat filler with coupling agent to reduce friction; 4) Regularly check wear, replace promptly when >0.3mm
الخلاصة الأساسية
Screw wear is caused by filler friction and adhesion; wear-resistant screw and temperature control are key
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