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1 Maintenance items for injection molding machine
1) When checking the high-voltage components in the machine, if it is not necessary, the main power supply should not be turned on.
2) When changing the mold, it is impossible to let the cooling water flow into the control box.
3) Check whether the temperature in the control box is too high, which affects the normal operation of the electronic board.
4) When changing the relay, the designated voltage relay should be used.
2 Maintenance of hydraulic system
1) The pressure temperature of the injection molding machine should be maintained between 30-50 degrees Celsius. If the oil temperature exceeds 60 degrees Celsius, the following problems will occur: The pressure oil deteriorates due to oxidation.
2) The viscosity of the pressure oil decreases, which leads to damage to the oil pump, oil leakage and pressure drop, as well as the working efficiency of the pressure reducing oil switch. Accelerate the aging speed of oil seals.
3) Prevent the cooling water from leaking into the oil tank, and pay special attention to checking whether there is water leakage inside the oil cooler. Remove the oil cooler and clean the inside every 6 months or so.
4) The pressure oil must be changed every 3000-4000 hours of operation of the injection molding machine. When changing the pressure oil, do not mix the new and the old oil. At the same time, the oil screen in the cylinder should be twisted to clean.
5) The valve core is blocked by foreign objects and fails. The valve core should be removed from the oil valve and cleaned with diesel or kerosene (or immersed in clean pressure oil for cleaning), and then compressed air is used to remove the foreign objects. Unless it is determined that the oil valve is blocked by foreign objects and causes the injection molding machine to malfunction, do not remove the oil valve casually.
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