If you notice rust or moisture near the hot runner vent, it could mean internal condensation or possibly a broken pipe. Moisture can cause a fatal short circuit to the heater. If the machine is not running 24/7, but is shut down at night or on weekends, the chances of this kind of condensation on the injection mold increase.
You should have measured the resistance of the heater when you first started using it, now is the time to measure it again and compare. If the resistance value fluctuates by 10%, it is time to 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, measure it now and use the value as a reference for future inspections of the heater.
2. Check if there is any sign of wear between the guide post and the guide sleeve, and look for scratches or scratches
This wear is due to lack of lubrication. You can also extend the life of the guide posts and bushings by lubricating them more, if the marks are only new. If the wear is severe, it's time to replace the parts with new ones. Otherwise, the cavity and core sections may not fit well, resulting in variable cavity wall thickness in the part.
3. Check the water flow
Connect a hose to the outlet of the water line, and let the water pass through the hose and stay in the bucket. If the outflow of water is not clear or colored, there may be rust, and if the water flow is not smooth, it means that there is a blockage somewhere.
If you find these problems, re-drill all the water pipes to keep them clear (or use whatever method you use most to clean them). Improving the plant's water treatment system can prevent future problems caused by rust and clogging.
4. Injection mold cleaning thimble
Over the course of a year, the thimble can get dirty from gas buildup and filmy debris. A good cleaning with mold cleaner is recommended every six to twelve months. After cleaning, apply a layer of lubricant to the thimble to prevent galling or breaking.
