This invention discloses a blowing device capable of realizing quantitative air blowing in an injection blow molding machine, comprising a turret. A plurality of core rod bases are hermetically arranged on the side wall of the turret, mounting holes are formed in the core rod bases, separating rings are arranged in the mounting holes, injection blow molding holes and positioning screw holes communicated with the mounting holes are formed in the core rod bases, positioning screws are threadedly connected in the positioning screw holes, T-shaped pistons are hermetically and slidably arranged in the mounting holes, the small-diameter sections of the T-shaped pistons are in sliding sealing with the separating rings, core rod sleeves are hermetically and fixedly arranged in the mounting holes, core rods are movably arranged in the core rod sleeves in a penetrating manner, the core rods are in sealing fit with the front side walls of the core rod sleeves, the core rods are connected with the T-shaped pistons, star nuts are fixedly arranged on the core rods, and return springs are arranged between the star nuts and the core rod sleeves. The invention can control the opening degrees of the air outlets between the core rods and the core rod sleeves in each core rod base to be consistent by adjusting the positioning screws, so as to ensure consistent molding quality of blow-molded products of the same batch.

Country Code: CN

Application Number: CN202511205866.0