Extrusion & Post
10 조회수
Severe screw wear of PVA extruder
문제 현상
After 200h of PVA extrusion, the wear of the screw and barrel reaches 0.5mm
원인 분석
Filler causes heavy wear on the screw; screw material hardness insufficient and not nitrided; processing temperature on the high side causes PVA to adhere to the screw, aggravating wear
해결 방법
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 amount, replace promptly when >0.3mm
핵심 요약
Screw wear is caused by filler friction and adhesion; wear-resistant screw and temperature control are the key
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