1. Check whether there is an early warning rust or damp phenomenon at the air diffuser. If you find rust or moisture near the hot runner vent, it means there is condensation inside, or the water pipe may be broken. Moisture can cause a fatal short circuit to the heater. If the machine is not running 24/7 and needs to be shut down at night or on weekends, the chance of this condensation will increase.
2. Remember to remind the operator not to "clean up" the hot nozzle at the gate. If the operator happens to see a small piece of stainless steel at the die shroud, it may be a shroud assembly. "Cleaning up" this seemingly obstructive thing often destroys the hot tip. In order not to damage the hot nozzle, please confirm the nozzle type of the hot runner system before taking action, and ensure that all operators are well trained to recognize the different types of nozzles they come into contact with.
3. Sliding stop buckle. For machines that run year-round, this work should be done weekly. And the end of the year is a good time to give these parts a routine lubrication maintenance.
4. Check the resistance value of the heater interactively. You should have measured the resistance of the heater when you first started using it, and it is time to measure and compare it again at the end of the year. If the resistance value fluctuates by ±10%, it is time to consider replacing the heater to ensure it does not fail at a critical point in the production process. If the initial resistance value has never been measured, measure it once and use the resulting value as a reference for future inspections of the heater.
5. Check for signs of wear between the guide post and the guide bush. Look for signs of scratches or scuffs, which are mold fitting wear due to lack of lubrication. If the marks are just emerging, you can also extend the life of the guide posts and guide bushes by lubricating them. If the wear is severe, it should be replaced with new parts. Otherwise, the cavity and core sections may not fit well, resulting in variable cavity wall thicknesses in the part.
