The invention discloses a mold clamping mechanism of an injection blow molding machine, comprising an injection mold beam and a blow mold beam, a front booster cylinder, an injection mold opening and closing cylinder and a rear booster cylinder are arranged on the injection mold beam, and a blow mold opening and closing cylinder is arranged on the blow mold beam; a flange pipe communicated with the rodless cavity of the front booster cylinder is also arranged on the injection mold beam, the other end of the flange pipe is communicated with a liquid filling oil tank through a liquid filling valve, a diversion hole is arranged on the pipe wall of the flange pipe, a diversion pipe is connected to the diversion hole, and the other end of the diversion pipe is communicated with the rodless cavity of the rear booster cylinder. The injection mold beam and the blow mold beam are respectively arranged, and the front booster cylinder, the injection mold opening and closing cylinder and the rear booster cylinder are arranged in the same row as the main upright posts at both ends of the injection mold beam, so that the injection mold beam will not twist under any circumstances, and similarly, the blow mold beam will not twist.

Country Code: CN

Application Number: CN201610766157.4