Injection Molding
7 조회수
Poor glass fiber dispersion flow marks of PPO
문제 현상
PPO+PS+40%GF products show flow marks and uneven glass fiber distribution, with obvious strength anisotropy and locally visible fiber agglomeration.
원인 분석
Medium-high speed injection helps uniform glass fiber distribution; too low speed causes disordered fiber orientation and produces flow marks; low melt temperature and high melt viscosity make fiber dispersion difficult; the screw mixing capacity is insufficient.
해결 방법
①Keep the injection speed at a medium to high level to promote uniform fiber distribution; ②control the melt temperature at 270~290℃ to ensure flowability; ③use appropriate back pressure to improve mixing; ④check the screw wear condition.
핵심 요약
PPO glass fiber dispersion depends on a reasonable combination of speed and temperature; the mixing requirements of 40% high fiber content cannot be treated as ordinary material; regularly evaluate the screw condition.
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!