The punching device of a middle sealing bag making machine relates to the technical neighborhood of bag making machines.Comprising a booster cylinder and a punching plate support seat;Two booster cylinder fixing plates are installed on the upper fixing beam of the bag making machine,and two booster cylinders are installed on the booster cylinder fixing plates;The lower end of the piston rod of the booster
cylinder is installed with a punching tool connecting seat,a punching tool connecting plate is installed under the punching tool connecting seat,a punching tool plate is installed under the punching tool connecting plate,and a punching tool plate is installed at the lower end of the punching tool plate connecting seat;The punching plate support seat is located directly below the punching knife plate;An adjusting sopport seat is set above the lower fixed beam of the middle sealing bag making machine.The upper end of the adjusting screw passes through the asjusting support seat,and the lower end is connected to the lower fixed beam.The bearing and plane bearing are installed on the adjusting support seat,and the punching plate support seat is installed on the plane bearing.
