Three common faults of injection molding machine

In the process of using the injection molding machine, it is inevitable that some faults will occur after a long time. Be careful of the occurrence of faults, because they will affect the formation of injection molding and lead to the unqualified quality of plastic products. Generally speaking, there are three common faults of the injection molding machine that we will face. For these three common faults, we hereby collect and sort out the corresponding solutions for you, I hope I can help you.

I. The oil pump motor and oil pump of the injection molding machine are started, but there is no pressure

1. The wiring of the proportional valve on the injection molding oil pump is loose or the coil is burned – check whether the proportional pressure valve is energized.

2. Impurities block the oil port of the proportional pressure valve on the oil pump – remove the proportional pressure valve to remove impurities.

3. The pressure oil is dirty and sundries accumulate on the surface of the oil filter, preventing the pressure oil from entering the pump – clean the oil filter and replace the pressure filter.

4. The internal oil leakage of the oil pump is caused by excessive use, internal loss or unclean pressure oil – repair or replace the oil pump.

5. Oil leakage from oil pump barrel, oil throat and joint – eliminate the leakage.

6. Oil making stuck – check whether the oil making spool moves normally.

II. The temperature of the melt cartridge of the injection molding machine cannot be controlled

1. The temperature of the injection molding machine cannot be controlled. Check whether the contact of the electric contactor is stuck and whether the wire of the thermocouple is loose or damaged.

2. If the temperature cannot rise, check whether the electric heating air switch in the electric box is adjusted, whether the contactor and relay are pulled in, whether there is voltage, whether the fuse is burnt out, and whether the heating ring is burnt out.

3. Check whether the thermometer is damaged.

III. The injection molding machine does not lock the mold

1. Whether the front safety door has been closed, whether the limiter of the safety door has been pressed and loosened by the safety door, and whether the wiring is loose or damaged.

2. The coil of the mold locking solenoid may have moved into the valve and stuck the valve core – clean or replace the mold locking and opening control valve.

3. The directional valve may not reset – clean the directional valve.

4. The thimble cannot be returned for reset – check whether the thimble action is normal.

5. Check whether the origin of the computer controller mold locking and mold opening electronic ruler has changed and whether the mold locking position has been terminated.

6. Check whether the pressure gauge acts.

7. Press the mode locking key to see whether the display screen displays mode locking signal or other signals and alarms.

8. Check whether the mold locking position, speed and pressure of the injection molding machine are adjusted normally.

9. Check whether the piston rod of the die lock is broken.

For the above described troubleshooting, did you solve the corresponding mystery? If you have other questions about the injection molding machine, you are welcome to call us at any time, or you can continue to follow our website, and we will continue to update.