The noise source and elimination method of the injection molding machine are as follows:
First, the cause of vibration pump noise and its elimination
First, the cause of vibration pump noise and its elimination
the reason:
1. The oil pump motor is installed differently.
2. The coupling is loose.
3. Internal failure of the oil pump.
4. The oil level is too low, and the air is sucked into the oil from the oil filter net or joint connection.
5. Inhale air from the motor to the moving shaft.
6. Oil stains block the oil filter net.
7. Loosen the oil return pipe and take in the air or oil pipe on the oil surface and mix the air into the oil.
Troubleshooting method:
1. Concentricity should be adjusted to within 0.1mm.
2. Correct the coupling.
3. Repair or replace the oil pump.
4, increase the amount of oil in the filter oil and joint position 400mm or more.
5. Replace the rotating shaft seal.
6. Clean the oil filter and filter the oil.
7. Clean the oil filter and filter the oil.
8. Lock the oil return line and extend the return line to the oil level.
Second, the cause of motor noise and how to eliminate it
the reason:
1. The motor bearing is damaged.
2. The motor coil winding is faulty.
3. The motor wiring is wrong. When the system pressure rises, the noise increases.
Troubleshooting method:
1. Replace the bearing.
2. Replace or repair the motor.
3. Re-reference the wiring diagram wiring.
Third, the total pressure valve noise (relieving valve) causes and troubleshooting
the reason:
1. There is air in the front chamber of the pilot valve of the relief valve.
2. The damping hole on the main valve core of the relief valve is blocked by oil and dirt.
3. The pilot valve and the valve seat are not in close contact with the strain.
4. The spring is deformed or misplaced.
5. The remote control port oil flow is too large.
6. The viscosity of the hydraulic oil is too low or too high.
7. Resonance with components in the loop.
Troubleshooting method:
1. Strengthen the seal and reverse the lifting and debugging pressure several times.
2. Clean the valve body to make the orifice smooth.
3. Repair or replace.
4. Repair and replace the spring.
5. Reduce the flow of the remote control port.
6. Change the oil.
7. Other component pressure settings cannot be similar to the relief valve pressure setting.
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