Injection Molding
6 조회수
PET thermocouple calibration
문제 현상
Multiple preform injection machines produce with the same parameters, but the preform quality differs obviously
원인 분석
Thermocouple deviations among the machines make the same nominal temperature actually different, and PET's narrow window is sensitive to deviations; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
해결 방법
Regularly calibrate the thermocouples of each machine with a standard thermometer; replace those with deviation exceeding ±3℃; process documents are based on actual measurement; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
핵심 요약
Unified temperature measurement is the prerequisite for multi-machine consistency; 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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