The reason and solution of the noise during the injection molding machine processing

Oil pump noise and vibration

Cause of the fault:

1. The pump motor is installed differently.

2, loose coupling.

3, internal pump failure.

4. If the oil level is too low, suck air into the oil from the oil filter or joint connection.

5. Intake air from the motor shaft.

6, oil plug filter network.

7. The return pipe is loose. Inhale air or oil pipe on the oil surface. Mix air into the oil.

Method of exclusion:

1. Concentricity should be adjusted to within 0.1MM.

2. Correct the coupling.

3, repair or replace the oil pump.

4, increase the oil in the oil filter and joint position 400mm or more.

5. Replace the rotating shaft seal.

6. Clean the oil filter net and filter the oil.

7. Clean the oil filter net and filter the oil.

8. Close the oil return line and extend the return line to the underside of the oil level.

Motor noise

Cause of the fault:

1, motor bearing damage.

2, motor coil winding failure.

3, motor wiring error, the system pressure increases, the noise increases.

Method of exclusion:

1, replace the connection bearing.

2. Replace or repair the motor.

3, re-reference wiring diagram wiring.

Total pressure valve noise (overflow valve)

1. Air exists in the front chamber of the pilot valve of the relief valve.

2. The main orifice of the relief valve is blocked by oil dirt.

3, the pilot valve and the valve seat do not cooperate with the joint.

4, spring deformation or wrong.

5, remote oil flow is too large.

6, hydraulic oil viscosity is too low or too high.

7. Resonate with components in the loop.

Method of exclusion:

1, to strengthen the seal, repeated lifting and debugging pressure exhaust several times.

2. Clean the valve body so that the orifice is smooth.

3, repair or replacement.

4, maintenance and replacement of springs.

5, reduce the flow of remote control.

6, replace the oil.

7. The pressure setting of other components cannot be similar to the relief valve pressure setting value.

Hydraulic cylinder noise

(1) There is air mixed in the oil or the air in the hydraulic cylinder is not fully drained, causing cavitation under the effect of high pressure and causing large noise. At this point, air must be drained in a timely manner.

(2) The cylinder head oil seal is too tight or the piston rod is bent. In the course of the movement, noise may also be generated due to the other forces. At this point, the oil seal or rod must be replaced in time.

Fives. Pipeline noise. Pipeline noise is usually caused by too many bends in the hydraulic lines or loosening of the fixing sleeve. Therefore, to avoid dead bends on the hydraulic pipe line, check the elasticity of the ferrule in time.

Baking Pan

Silicone Cake Pan,Baking Pan,Bundt Cake Pan,9 Inch Cake Pan

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