A rotary-shaft type turntable positioning device of an injection molding machine includes a first encoder and a second encoder installed at a servomotor of a positioning device and a speed reducer respectively, so that after the injection molding machine finishes an injection molding, the servomotor is used to drive the driving shaft and link the output shaft to drive the driving wheel to rotate a rotary shaft, while rotating and positioning a turntable. During rotation, signals of the first encoder and the second encoder are sensed to adjust the position, so as to control the turntable to be rotated to a precise position.

An intermediate mold disposed between a stationary-side mold and a movable-side mold in a mold unit of an injection molding machine, the intermediate mold including: a mold portion that performs a mold opening and closing operation with a facing mold facing one of the stationary-side mold and the movable-side mold; a guide bar that penetrates through the mold portion, and that guides the mold opening and closing operation; and a rotary frame body that includes a rotary shaft, and that rotates together with the guide bar and the mold portion in a state where the rotary frame body is joined to the guide bar. The mold portion is temporarily gripped by a tip part of the guide bar, and is temporarily gripped by the facing mold.

An intermediate mold is disposed between a stationary side mold and a movable side mold in a mold unit of an injection molding machine, the intermediate mold includes: a mold section that performs mold opening and closing operations with a facing mold of the stationary side mold and the movable side mold; a rotating frame body that is rotated together with the mold section by a rotary shaft; a support section that supports both sides of the rotating frame body via shaft bodies; and a rotation drive section that transmits a rotational force to the rotating frame body, in which the support section accommodates at least a part of the rotation drive section.

An intermediate mold disposed between a stationary side mold and a movable side mold in a mold unit of an injection molding machine includes: a mold section performing mold opening and closing operations with a facing mold of the stationary side mold and the movable side mold; a rotating frame body rotated together with the mold section by a rotary shaft; a support section supporting both sides of the rotating frame body via shaft bodies; and a rotation drive section transmitting a rotational force to the rotating frame body, in which the mold section and the shaft bodies include a hollow portion that allows a pipe through which a fluid passes or an electrical wire to be disposed, and both end portions of the hollow portion form inlet/outlet ports through which the pipe or the electrical wire can enter and exit in a rotation axis direction of the shaft bodies.