히터 누출에 대한 긴급 처리 절차가 있습니까?

I. 즉각적인 비상 위험 제어(0~5분) 즉시 핫 러너 시스템의 비상 정지 버튼을 눌러 히터에 공급되는 220V 주 전원을 차단하여 누출로 인해 절연층이 계속 파괴되어 센서 누화 트립이 발생하는 것을 방지합니다. 감전 위험을 방지하려면 즉시 장비 주변에 고온 경고 표시를 설치하고 승인되지 않은 사람이 핫 러너 금속 케이스에 손을 대는 것을 금지하십시오. 온도조절기 이상 트립의 채널번호와 누수방지 트립시간을 동시에 기록하여 히터 이상 위치를 신속하게 찾아냅니다. II. 급속 누출 결함 위치(5~15분) 모든 히터 단자를 분리하고 500V 디지털 절연 저항계를 사용하여 각 채널의 절연 저항을 테스트합니다. 절연저항이 있는 누수히터를 10분 이내에 정확하게 찾아냅니다.<0.5MΩ. Use an AC millivoltmeter to test the voltage to ground of the runner casing to confirm whether the leakage current has entered the sensor circuit and assess the impact on current production products. III. Tiered Emergency Repair and Handling Minor Leakage (Insulation Resistance 0.5MΩ~5MΩ, Moisture Only): No disassembly required. Activate the hot runner at 150℃ and continue drying for 2 hours to remove moisture absorbed by the magnesium oxide insulation layer. Once the insulation resistance is retested and rises to ≥5MΩ, production can resume. No disassembly is required throughout the process, and downtime should be controlled within 2.5 hours. Moderate Leakage (Partial Insulation Damage, No Heating Wire Blown): Quickly remove the faulty heater, cut off the damaged section of the heating wire on-site, and fill with high-purity magnesium oxide powder for emergency insulation repair. Reinstallation should be completed within 1 hour. Production can resume after high-temperature verification confirms no dynamic leakage, without waiting for new parts. Severe Leakage (Heating Wire Blown, Large Area of ​​Insulation Layer Burned): Directly activate the pre-prepared spare heater of the same specifications. Follow the rapid replacement procedure to complete disassembly and reassembly within 20 minutes, simultaneously replacing aging heating cables and oxide connectors. Throughout the process, tighten the fixing screws strictly according to the torque standard to avoid localized stress compressing the insulation layer of the new heater. IV. Safety Verification Before Resuming Production Retest the insulation resistance of all heaters at room temperature to confirm that the entire channel is ≥5MΩ, with no potential static leakage. Heat to 320℃ and hold for 1.5 hours. Use an AC millivoltmeter to test the voltage of the heater casing to ground to <1V, confirming no dynamic leakage. Continuously observe the temperature controller data for 30 minutes to confirm that the sensor has no jumps or overcurrent alarms. After a small-batch trial production of 10 modules to verify quality, full-scale production is officially resumed. V. Post-Incident Root Cause Review and Prevention Record the cause of this leakage fault, repair time, and handling details, and archive them in the hot runner full life cycle maintenance log. Simultaneously update the quarterly insulation inspection plan, shortening the inspection cycle of this batch of heaters from 3 months to 1 month, providing early warning of potential insulation degradation. Install residual current circuit breakers with a 30mA tripping threshold in all heater circuits to achieve automatic power cut-off upon leakage, preventing similar faults from escalating again.