Injection molding machine common faults and treatment methods

1, the motor does not run

1. The electric power source fuse is blown;

2. The start button connector is defective;

3. Overload relay trips;

4, the main circuit is faulty, the breaker is broken.

Replace the insurance.

Repair or replace related accessories.

2, hum and not turning

Missing phase

Check the power supply.

3, the oil pump issued an abnormal

1. Inhalation of air on the inhalation side;

2. The oil filter is blocked;

3. There is wear in the pump;

4. The oil level is too low.

1. Repair the joints on the suction side.

2. Clean the filter.

3. Repair the oil pump.

4. Add enough oil.

No action

1. The total pressure valve is faulty;

2. The amplifier board is faulty;

3. The motor and oil pump connection flange are faulty;

4. The servo valve electromagnetic coil is glued down.

1. Repair the total pressure valve and the amplifier board.

2. Repair the connector.

3. Install the electromagnetic coil.

5, not closed

1. The top retreat is not in place;

2. The security door is not closed;

3. The robot does not give the closing signal;

4. The position rule data is faulty;

5. The directional valve does not work.

1. Check if the withdrawal is terminated.

2. Check the safety gate circuit, oil circuit and machinery insurance.

3. Overhaul the manipulator position.

4. Check the position ruler.

5. Check if the valve body has power supply and there is no jam.

6, do not open the mold

1. The directional valve is faulty;

2. Insufficient pressure;

3, the mechanical hand hole of the curved hand;

4. The position ruler is faulty.

1. Check the valve body.

2. Adjust the mold opening pressure.

3. Overhaul the curved arm.

4. Repair the position ruler.

7, do not eject

1. The robot has no ejector signal;

2. The mold opening is not completed;

3. The solenoid valve is faulty.

1. Check the robot.

2. Check if the mold opening is completed.

3. Repair the solenoid valve.

8, the pressure does not rise or the temperature rises slowly

1. The pressure regulating valve is not tight enough;

2. There is air inside the hydraulic cylinder;

3. The pressure regulating valve is faulty.

1. Remove the inspection.

2. Exhaust.

3. Overhaul.

9, do not shoot

1. The solenoid valve is in poor operation;

2. The pressure adjustment valve is defective;

3. The foreign object is blocked by the nozzle;

4. The nozzle is too cold and the temperature of the material tube is low.

1. Check the solenoid valve.

2. Check the safety valve.

3. Check the nozzle.

4. Check the temperature of each section.

10, no feeding

1. The solenoid valve is defective;

2. Bad back pressure adjustment;

3. The temperature of the material tube is poor;

4, the melt glue moves, but does not cut.

1. Check the back pressure valve.

2. Check the temperature.

3. The screw is broken or not slipping.

11, the electric heat is not normal

1. Breaker failure;

2, the heating ring is broken;

3. The thermocouple is broken;

4. The wire is shorted or grounded.

1. Replace damaged parts.

2. Repair the wires.

12, oil temperature is too high, oil spill

1. The use pressure is too high 140KGF/CM2;

2. The oil pump wears or the oil viscosity is too high;

3. Insufficient oil quantity;

4, the cooler is blocked;

5. The cylinder screws are loose.

1. Check the pump to reduce the viscosity.

2. Add enough hydraulic oil.

3. Clean the cooler.

4. Tighten the screws.

13, directional valve,

Pressure valve produces noise

1. Adjust the pressure without checking, the spring resonance;

2. The valve core is stuck;

3. The electromagnetic coil is aging;

4. No electromagnetic force.

1. Readjust to OK.

2, cleaning.

3. Replace the accessories.

4, poor wiring or insufficient voltage check and repair.