The invention relates to
bottle blowing
machine equipment, in particular to a die opening and closing device for a
bottle blowing
machine. The die opening and closing device for the
bottle blowing
machine comprises a die frame, bottle body die devices, die seats, a power device and a bottom film
assembly. The bottle body die devices, the die seats and the bottom film
assembly are arranged in the die frame. The die opening and closing device further comprises a rotating device controlling the bottle body die devices to be subjected to die opening and die closing. The rotating device comprises a rotating plate, an arc gear, a rotating shaft and a bottom film
cam. The arc gear is in an arc shape with sawteeth on the outer side, the outer side of the arc gear is connected with the power device through a gear, and the inner side of the arc gear is fixed to one side of the rotating plate. A center hole is formed in the center position of the rotating plate, the rotating shaft penetrates the center hole to be connected with the bottom film
cam, and the rotating plate is further provided with a sliding way controlling the bottle body die devices to transversely move. By means of the die opening and closing device for the bottle blowing machines, the mutually-matched rotating device is used for replacing a traditional connecting rod mechanism, oil does not need to be frequently injected for
lubrication, damage of a hinge bearing is avoided, and the maintenance work is more convenient.