Common problems and solutions of injection molding machines

1. After the injection molding machine motor is started, there is pressure on the pressure gauge
Handling method:
1) The amplification board is damaged. Use a multimeter to check for current flow and repair the amplifier board.
2) : The overflow valve is stuck. Remove the overflow valve for inspection and clean it.
2. After starting the injection molding machine for a period of time, the oil pump makes a loud noise
Handling method:
1) The quality of the suction pipe is not good. Remove the filter screen to check for deformation. Is the suction pipe layered. Replace the oil pipe and filter screen.
2) The filter screen is not clean. Is there too much impurities in the hydraulic oil. Clean the filter screen.
3) Oil pump wear: Check the oil distribution plate and rotor end face of the oil pump. Replace the oil pump.
3. Handling of creeping problem in injection molding machine
Reason for occurrence:
1) Poor smooth condition. A 'pause slide pause' appears. Increase the amount of smoothness.
2) Immerse the system in air. Need to exhaust.
3) Mechanical rigidity reasons. The wear and deformation of the parts cause changes in friction, resulting in crawling and replacement of the parts.
4. Analysis of the Causes of Hydraulic Oil Pollution in Injection Molding Machines
Causing oil pollution:
1) Air mixed in the oil. Mainly due to poor sealing of pipe joints, hydraulic pumps, hydraulic cylinders, etc. This is manifested by bubbles on the fuel tank.
2) : Water mixed in the oil. It will make the oil turn milky white. The main cause is water leakage in the cooler.
3) Solid impurities mixed in the oil. Mainly chips, welding slag, rust flakes, and metal powder.
4) Glial substances occur in the oil. The main reason is that the sealing element is corroded or deformed by the oil, resulting in the occurrence of colloidal substances in the oil, which often block small holes.
5. Dealing with the problem of loud noise during injection molding machine opening
Handling method:
1) Due to poor linearity of the shares and poor orientation adjustment during mold opening and closing, check the oblique rise and fall of the amplification board, adjust the oblique rise and fall of the amplification board, and make appropriate adjustments at all times.
2) The hinge of the locking machine is not smooth enough. Check the Golin column, the second board sliding foot, and the smoothness of the hinge. Increase the smoothness.
3) The locking force of the mold is too large. Check the condition of the locking force when the mold is under force, and reduce the locking force based on the user's product condition.
4) : Parallelism deviation of the first two plates, check the parallelism of the first two plates. Adjust the parallelism error of the second board and the head board.
5) Slow to fast mold opening direction too small, speed too fast. Check if the slow to fast mold opening direction is appropriate and if the slow mold opening speed is too fast. Extend the direction of slow mold opening and decrease the speed of slow mold opening.