Mold opening and closing device of vertical injection molding machine

The utility model discloses a mold opening and closing device of a vertical injection molding machine. The mold opening and closing device comprises a rack with a fixed seat and an upper mold plate positioned above the fixed seat, the upper mold plate is fixed on a plurality of supporting rods, a movable seat, a connecting seat positioned above the movable seat, at least two groups of connecting rod mechanisms and a mold opening and closing motor lead screw driving device are arranged below the fixed seat, the supporting rods penetrate through guide sleeves on the fixed seat, and the movable seat is mounted at the lower parts of the supporting rods; and the connecting seat is positioned between the fixed seat and the movable seat and is fixedly connected with the fixed seat. By adopting the technical scheme, the mold opening and closing device of the vertical injection molding machine realizes the mold closing action by matching the mold opening and closing motor lead screw driving device with the crank arm c