Processing Machinery
3 조회수
PA66 material changeover and purging difficulty
문제 현상
After changing PA66 to other materials, black specks persist for a long time and cannot be cleaned.
원인 분석
Residual carbonized layer of PA66 at high temperature is firm; a dedicated purging process is needed; ordinary purging methods are difficult to remove it; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience.
해결 방법
①Lower temperature to 250℃ and use PC or PMMA type purging material to displace the carbide; ②then raise temperature and change to the target material; ③remove the screw for inspection if necessary; ④record the SOP.
핵심 요약
PA66 material changeover='first use solvent-type material to pull out carbon': a dedicated purging process is standard; the carbonized layer of high-temperature nylon is stubborn, and purging must pay attention to method and temperature gradient.
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!