How to solve the common problems with the locking system of these injection molding machines?

（9） Poor mold locking
Handling method:
1) Improper adjustment of holes A and B, when setting the system flow rate of 20 and pressure of 99, observe whether the locking action is crawling, readjust or replace the valve.
2) There is air in the oil circuit, listen for air noise in the oil circuit, check for bubbles in the oil, and exhaust.
3) Improper adjustment of the ramp up and down of the amplification board. Observe whether the current value of the ammeter is proportional to the rise and fall changes or the speed, and adjust the amplification board.
（10） Unable to withstand high pressure during mold locking, exceeding the stroke
Handling method:
1) If the limit switch exceeds the limit, check if the mold adjustment is appropriate and adjust the appropriate mold thickness; Check if the motor is in normal condition.
2) If the hydraulic limit exceeds the stroke, check if the electronic ruler's stroke position is appropriate, and adjust the mold to move forward appropriately.
（11） Manual with mold termination, semi-automatic without mold termination
Handling method:
1) The mold opening valve is leaking. After manually shooting the table, observe if the second plate is moving backwards and replace the mold opening valve.
2) Check the maximum stroke and pressure flow rate of the electronic ruler.
（12） No ejector pin action
Handling method:
1) The limit switch of the ejector pin is broken. Use a multimeter to check if the 24V proximity switch is on. Replace the ejector pin limit switch.
2) Block the valve, use a hexagonal spoon to press the top needle valve core to see if it is movable, and clean the pressure valve.
3) The ejector pin limit rod is broken. After stopping the machine, remove the limit rod by hand and replace it.
4) The ejector pin switch is short circuited. Use a multimeter to check the zero voltage between the ejector pin switch and ground, and replace the ejector pin switch.
5) Improper setting of electronic ruler position.
（13） When semi-automatic, the ejector pin loses control
Handling method:
1) The ejector pin board is damaged. Check if the circuit is normal and the normal voltage is DV24V. Repair the ejector pin plate.
2) : The line is broken. Thoroughly inspect the switch connection line and the connection line on the I/O board. Check the wiring and rewire it.
3) : Check if the mold is misaligned.
4) Check if the sealing ring of the oil cylinder piston rod is damaged.