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.