The maintenance program required for each injection molding location depends on the different mold cycle times. Here are some general guidelines that can be used by each mold user to ensure the efficient operation of hot runners, heaters, guide posts, and ejector mold assembly components, To prevent accidents from happening.
1. Are there any warning signs of rust or moisture in the air vents? If you find rust or moisture in the vicinity of the hot runner vents, it means that there is a possibility of internal condensation or a broken water tube. Moisture causes a fatal short circuit to the heater. If the machine does not run all year round, but shuts down in the evening or on the weekend, the chance of this condensation will increase.
2. Remember to remind the operator not to 'clean' the hot nozzle tip at the gate – if the operator happens to see a small piece of stainless steel at the die nozzle, it may actually be a point nozzle assembly. 'Clean up' this seems to be a hindrance Often things will destroy the hot mouth. In order not to damage the hot mouth, please confirm the type of mouthpiece of the hot runner system before taking action to ensure that all operators are trained and able to identify all the different types of mouths that they contact.
3, Sliding stop buckle - This work should be performed once a week for machines that are running all year round.
4. Verify the resistance of the heater interactively – you should have measured the resistance of the heater just before starting to use it. Now it is time to measure it again and compare it. If the resistance value is 10% above and below the float, It is time to consider replacing the heater to ensure that it does not come out at a critical moment in the production process. If the original resistance value has never been measured, measure it now and use the resulting value for future inspections of the heater. Reference data.
5. Look for signs of wear between the guide post and the guide bush – look for signs of scratches or scratches. This wear is due to a lack of lubrication. If the sign is just there, you can also pass the guide post and Guide bushes are more lubricated to prolong their life. If the wear is severe, it is time to replace the new part. Otherwise, the cavity and the core part may not be well matched, resulting in a thin wall thickness of the parts.
6. Check the flow of water – Connect a hose at the outlet of the waterway and allow the water to pass through the water pipe to the bucket. If the outflow of water is not clear or colored, there may be rusting, and the lack of smoothness means that Plug in. If you find any of these problems, drill all hoses again and ensure that they are clear (or use whatever method you use most often for cleaning). The improvement of the plant's water treatment system prevents future problems caused by rust and obstruction.
7. Cleaning thimble – After a year, the thimble becomes very dirty due to gas accumulation and filmy impurities. Zhenye Injection recommends cleaning it with a mold cleaning agent every six to twelve months. Afterwards, apply a layer of lubricant to the thimble to prevent galling or breaking.
8. Check whether there is a fracture in the radius of the hot filling nozzle – the fracture is caused by the holding force of loose plastic chips that remain in the hot nozzle of the machine from the plastic injection barrel assembly during forward injection molding. The cause of the problem may also be the misalignment of the centerline. The two possibilities must be considered when finding a fracture. If the damage is severe enough to prevent the emergence of petaloid leakage (a term used by mold users in the past: refers to If the plastic leaks between the sleeve and the hot mouth of the machine, it should replace the sprue bushing.