The invention discloses a mold opening and closing device of an injection blow molding machine and a connecting rod safety mechanism thereof, the connecting rod safety mechanism comprises a support frame, an injection mold connecting rod and a blow mold connecting rod are arranged on the support frame, the injection mold connecting rod is located above the blow mold, the blow mold connecting rod is located above the injection mold, springs are respectively arranged on the upper parts of the injection mold connecting rod and the blow mold connecting rod, detection blocks for detecting spring compression are connected to the springs, the detection blocks are connected with a switch for controlling mold opening and closing actions, an injection mold rotating arm and a blow mold rotating arm are respectively connected to the lower ends of the injection mold connecting rod and the blow mold connecting rod, the injection mold rotating arm and the blow mold rotating arm are arranged crosswise, the lower ends of the injection mold rotating arm and the blow mold rotating arm are respectively connected to the upper part of the blow mold and the upper part of the injection mold, and a collision block located at the cross position of the injection mold rotating arm and the blow mold rotating arm is also arranged on the turntable. When the injection mold or the blow mold contacts the core rod, the collision block collides with the injection mold rotating arm or the blow mold rotating arm, the detection block detects spring compression, the detection block is disconnected from the switch, and the mold opening and closing actions stop.

Country Code: CN

Application Number: CN201910193592.6