Home > News > Content

Taizhou Union Plastic Mould Co.,Ltd

ADD:No.26, MaoFeng Street, Beicheng Development Area, Huangyan Dist., Taizhou, Zhejiang, China

Post Code: 312080

Contact:Ms vicky






Injection Mold Maintenance Easy To Ignore The Aspects
Mar 07, 2019

The maintenance procedures required for each injection molding position depend on the different die cycle. The following are some general principles that each mold user can use to ensure that the hot runner, heater, guide column, thimble and other mold components run effectively, in case of unexpected circumstances.

1. Check the vent for warning signs of rust or moisture -- if you find rust or moisture near the vent in the hot runner, that means internal condensation or the possibility that the pipe might break. Humidity can cause a fatal short circuit to the heater. If the machine is turned off at night or on weekends, rather than running year-round, the chance of condensation increases.

2. 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 mold nozzle, it may actually be a nozzle assembly. "Clean up" what seems to be a hindrance often ruins the hot tip. To prevent damage to the hot nozzles, check the type of nozzles in the hot runner system before taking action to ensure that all operators are trained and able to identify all different types of nozzles they are in contact with.

3.Slide stopper - this should be done once a week for machines that operate year-round.

4. Cross-check the resistance of the heater -- you should have measured the resistance of the heater when you first started using it. Now is the time to measure and compare again. If resistance values fluctuate by 10%, consider replacing the heater to ensure it does not break down at critical points in production. If the initial resistance has never been measured, measure it now and use it as a reference for future inspection of the heater.

5. Check the guide column and guide sleeve for signs of wear -- look for signs of scratches or scratches, which are caused by the lack of lubrication. If the marks are just beginning to appear, you can extend the life of the guide posts and sleeves by lubricating them more. If the wear and tear is serious, it's time to replace the parts. Otherwise, the cavity and core parts may not fit well, resulting in parts cavity wall thickness.

6. Check the flow of water -- connect a hose to the outlet of the waterway and let the water flow through the hose into the bucket. If the water is not clear or colored, rust may occur, and a blocked flow means a blockage somewhere. If these problems are found, drill through all the pipes again to make sure they are clear (or clean them up in any way you most often use). Improving the plant's water treatment system can prevent future problems caused by rust and blockage.

7. Clean thimble -- over the course of a year, the thimble will become dirty due to gas accumulation and membrane impurities. It is recommended that the mold cleaner be thoroughly cleaned every six to twelve months. After cleaning, apply a lubricant to the thimble to prevent abrasion or breakage.

8. Check whether there is a fracture in the radius area of the hot nozzle -- the fracture is caused by the clamping force from the plastic cylinder assembly when the loose hardened plastic fragments remaining in the hot mouth of the machine are injected forward. It is also possible that the center line is misaligned.

Consider these two possibilities when discovering a fracture. If the damage is severe enough to prevent petal leakage (a term previously used by mold users to refer to plastic leakage between the guide sleeve and the hot nozzles of the machine), the gate sleeve should be replaced.