Processing Machinery
4 조회수
ASA back pressure low value management
문제 현상
[Problem phenomenon] ASA back pressure too high shear heat accumulates, melt discolors and degrades
원인 분석
ASA screw back pressure recommended as low as 3.5bar (50psi) level; high back pressure shear heat generation makes actual melt temperature exceed setting, amorphous styrenics are sensitive to shear heat
해결 방법
Back pressure set at 3.5bar level low value; for insufficient plasticization, prioritize raising external heat; melt discoloration first check back pressure and speed; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
핵심 요약
ASA back pressure 3.5bar is the baseline, shear heat is an invisible overtemperature source; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!