This utility model relates to an injection blow molding machine, in particular to a mechanical mold locking mechanism for mold opening and closing of an injection blow molding machine, comprising an injection safety lock assembly and a blow molding safety lock assembly. Both the injection safety lock assembly and the blow molding safety lock assembly comprise a safety lock bracket, an air cylinder and a safety lock rod. The safety lock bracket is a U-shaped bracket installed on a cross beam with an outward opening, the air cylinder is installed on the side wall of the safety lock bracket by an air cylinder base, and a safety lock pin capable of extending into the opening of the safety lock bracket is arranged at the piston rod end of the air cylinder. The safety lock rods are respectively installed on the injection movable mold plate and the blow molding movable mold plate corresponding to the safety lock brackets, the upper ends of the safety lock rods are inserted into the openings of the safety lock brackets, and lock holes are formed in the safety lock rods. The utility model uses the air cylinder to drive the safety lock pin to be inserted into the lock hole of the safety lock rod to realize locking, featuring simple structure, safety and reliability, and ensuring the stability of the mold opening and closing state of the injection blow molding machine.

Country Code: CN

Application Number: CN202022149719.5