The invention relates to a bottle blowing mechanism of an injection blow molding machine, belonging to the technical field of injection blow molding machines. It comprises a machine body and a turret arranged on the machine body, with a number of mandrels connected to the turret. Each mandrel includes a rod body, a core rod, a mandrel head and a spring reset part. One end of the core rod located in the rod body is connected with the spring reset part, and one end of the spring reset part is connected with a locking device. The locking device includes a transmission component and a locking component, with the locking component connected with the spring reset part. One end of the transmission component is connected with a piston part, a transmission groove for the transmission of the transmission component is opened in the turret, and a first sliding groove for the piston part to slide is opened in the turret. A first ventilation pipe and a second ventilation pipe are opened in the turret, the first ventilation pipe is located at the side of the piston part far away from the locking device, and the second ventilation pipe is located at the side of the piston part close to the locking device. The first ventilation pipe is communicated with the first sliding groove, and the second ventilation pipe is communicated with the transmission groove. The invention has the effect of reducing the probability of the bottle body falling off during the movement of the turret.

Country Code: CN

Application Number: CN202222537611.2