Extrusion & Post
10 조회수
EVOH extruder screw wear is severe
문제 현상
After 200h of EVOH extrusion, screw and barrel wear reaches 0.5mm
원인 분석
Fillers cause heavy wear on the screw; screw material hardness insufficient without nitriding; processing temperature too high causing EVOH to adhere to the screw and aggravate wear
해결 방법
1) Use nitrided screw or bimetallic screw SK-2 alloy; 2) Reduce processing temperature to reduce adhesion wear; 3) Treat filler with coupling agent to reduce friction; 4) Regularly check wear amount and replace in time when >0.3mm
핵심 요약
Screw wear is caused by filler friction and adhesion; wear-resistant screw and temperature control are key
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