Control of thimble in semi-automatic vertical injection molding machine:

1) : thimble plate is broken, check whether the circuit is normal, normal voltage DV24V. Repair thimble plate.

2) : the wire is broken. Check the switch connection wire and the connection wire on the I/O board. Check the wiring and rewire it.

3) : check whether the mold is out of position.

4) : whether the sealing ring of cylinder piston rod is damaged.