The invention discloses a three-plate movable synchronous mold opening and closing structure of a blow mold for an injection blow molding machine, comprising two linear guide rails arranged on a table panel. A clamp head plate, a clamp second plate and a clamp third plate are slidably arranged on the two linear guide rails, the clamp head plate and the clamp third plate are fixedly connected through a plurality of guide pillars, the clamp second plate is slidably connected to the plurality of guide pillars, a synchronous box is arranged between the clamp head plate and the clamp second plate, a cavity is arranged in the synchronous box, a rotating shaft is vertically arranged in the cavity, a gear is rotatably sleeved on the rotating shaft, a first rack and a second rack meshed with the gear are also respectively arranged on the synchronous box, the first rack is fixedly connected with the clamp head plate, the second rack is fixedly connected with the clamp second plate, and a hydraulic push rod device for driving the clamp second plate to move is fixedly arranged on the clamp third plate. The gear drives the first rack and the second rack to move, indirectly drives the clamp head plate and the clamp second plate to move synchronously towards each other, and realizes precise alignment of the left half mold and the right half mold.

Country Code: CN

Application Number: CN201710003515.0