Processing Machinery
3 조회수
PET material change cleaning temperature
문제 현상
After PET is changed to other materials, gel particles and black specks persist for a long time
원인 분석
PET has a high melting point, and the residual material requires high temperature to be discharged, so a low-temperature purging material cannot push out the retained PET; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
해결 방법
For material change, first use purging material at 280℃ to push out the PET; then lower the temperature to switch; disassemble and clean the dead corners; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
핵심 요약
High-temperature material change requires purging at the same temperature before lowering the temperature; 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
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