Die assembly with cooling system inside

The utility model discloses a die assembly with a cooling system inside. The die assembly comprises a mounting seat, the telescopic mechanism is mounted on the mounting seat; the sliding seat is connected with the telescopic end of the telescopic mechanism; the sliding limiting assembly is arranged on the side face of the sliding seat; the mold closing piece is arranged on the sliding seat, the head end face is provided with a product face, and the side face is provided with a mold closing face matched with the upper mold and the lower mold; the cylindrical surface spiral circulating cooling assembly is arranged in the film combining piece, and the two ends of the cylindrical surface spiral circulating cooling assembly are externally connected with a cooling liquid inlet pipe and a cooling liquid outlet pipe; the tail ends of the core hole pieces are inserted into the mold closing piece, the head ends of the core hole pieces penetrate through the head end face of the mold closing piece, and the core hole piec