Detachable threaded rod for use in mold

An injection mold, comprising:

• a male mold comprising a first die;
• a female mold comprising a second die and defining a extending hole penetrating the second die, the first die and the second die cooperatively defining a receiving room;
• and
• a detachable threaded rod penetrating the extending hole, the detachable threaded rod comprising:
• an operation portion comprising a rod part, the rod part defining a mating hole and a screw hole on a bottom surface of the mating hole;
• a molding portion received in the receiving room and resisting against the first die, the molding portion comprising a front end, a rear end, and a side surface connected between the front end and the rear end;
• the molding portion defining a cavity on a front end, the molding portion comprising a mating portion extending from the rear end and received in the mating hole, the mating portion defining a through hole communicating with the cavity;
• the molding portion defining external threads on the side surface;
• and
• a screw penetrating the through hole and screwing in the screw hole, the operation portion being fixed with the molding portion by the screw.