What are the faults of the the vertical injection molding machine?

What are the faults of the the vertical injection molding machine?

First: Cannot shoot glue:

Approach:

1): The nozzle is blocked by foreign matter. Check whether the nozzle is blocked. Clean or replace the nozzle.

2): The glue nozzle is broken. Disassemble the flange to check whether the glue nozzle is broken. Replace the glue nozzle.

3): The injection directional valve is stuck. Check whether the directional valve has 24V voltage and the coil resistance is 15-20 ohms. If normal, the valve is blocked. Clean the valve or replace the directional valve.

4): The rubber injection piston rod is broken. Loosen the rubber injection piston rod tightening nut and check whether the piston rod is broken. Replace the piston rod.

5): The barrel temperature is too low. Check whether the actual temperature reaches the required melting point temperature of the material. Reset the barrel temperature.

6): The rubber injection piston oil seal is damaged. Check whether the piston oil seal is broken. Replace the oil seal.

Second: The starting sound of rubber shooting is loud:

Approach:

1): The injection molding machine speed starts too fast. Observe the change of the injection speed. Adjust the injection flow and speed.

2): There is air in the oil circuit. Observe whether there is vibration in each action.

Third: The sound is loud when the glue is stopped and the glue is melted:

Approach:

1): The movement conversion speed is too fast during injection. Check whether the injection has increased the holding pressure. Increase the holding pressure, adjust the injection level, and add the melt delay.

Fourth: The injection volume is unstable:

Approach:

1): The oil seal of the cylinder is worn. Observe the pressure retention of the pressure gauge. Replace the oil seal.

2): Dividing nozzle and rubber ring wear. It is detected by 2 shots. Replace the three-piece rubber nozzle.

3): The barrel is worn. It is detected with the nozzle 2 times, and the material is removed to check the wear condition. Replace the glue barrel.