Important steps for overhaul of mold parts (part 1)

- Jun 25, 2018-

The annual maintenance program required for each injection molding location of the mold depends on the different mold cycle times. The following are some mold parts maintenance tips that can be used by each mold user to ensure the effective operation of hot runners, heaters, guide posts and ejectors, and molding inserts to prevent accidents.


First of all, check if there is an alarming rust or dampness at the diffuser hole.


If you find rust or moisture near the hot runner vents, that means internal condensation or water pipes may break. Moisture causes a fatal short circuit to the heater. If the machine does not run for the entire year and it needs to be turned off in the evening or on weekends, the chance of this condensation will increase.


Second, remember to remind the operator not to "clean" the hot nozzle at the gate.


If the operator happens to see a small piece of stainless steel at the die nozzle, it may be a point nozzle assembly. "Cleaning up" this seemingly obstructing thing often destroys the hot head. In order not to damage the hot mouth, confirm the type of tip of the hot runner system before taking action, and ensure that all operators are well trained to identify the different types of mouths they are exposed to.


Third, taxi stop.


For machines that run throughout the year, this work should be done once a week. The end of the year is a very good time to perform a routine lubrication service for these parts.


Fourth, verify the resistance of the heater.


You should have measured the resistance of the heater just before you started using it, and the end of the year is the time to measure it again and compare it. If the resistance value is ±10% floating, consider replacing the heater to ensure that it does not fail at a critical point in the production process. If you have never measured the initial resistance value, measure it now and use the resulting value as reference data for future inspections of the heater.