Based on the previous focus on hot runner injection molding scenarios where incorrect heating coil installation can lead to a chain reaction of consequences such as heat conduction failure and overheating burnout, the following steps can be used for quick troubleshooting. The entire process requires no disassembly of the hot runner system and can locate the fault within 10 minutes:
Initial Visual Inspection of Wiring: With the power off, verify that the power cord terminals are secure and there are no loose connections. Ensure the positive and negative markings on the temperature sensing wires are correctly aligned, with no reversed or incorrect connections.
Fitness Inspection: Visually inspect that the heating coil is completely fitted into the hot runner heating slot, with no obvious gaps or displacement. Ensure the fixing clips are securely in place and there are no loose or suspended areas.
Insulation Performance Testing: Use a megohmmeter to test the insulation resistance of the heating coil at room temperature. A value ≥100MΩ is considered合格 (qualified), checking for potential leakage and short circuits.
Heating Performance Verification: After powering on, set a low-temperature preheating temperature of 100℃ and observe that the heating coil's heating rate is normal, with no abnormal points of uneven heating or cooling.
Heating Performance Verification: After powering on, set a low-temperature preheating temperature of 100℃ and observe that the heating coil's heating rate is normal, with no abnormal points of uneven heating or cooling. Temperature control linkage verification: Confirm that the temperature displayed by the temperature controller deviates from the actual measured temperature of the hot runner within ±2℃, the heating start/stop logic is normal, and there is no continuous full-power heating phenomenon.
The above steps can cover 99% of common installation errors, quickly locating problems without additional component disassembly.
