Box folding area is completed by the carton slotting knife, which consists of upper tools like upper front blade, upper rear blade, corn cutter and bottom tools like bottom round blade, anvil cover, round corning anvil. Slotting upper tool is sector in shape with serrated or crescent-shaped blades. Slotting bottom tool is an entire circle and chest in shape, while corn cutter includes three types (I-shaped,L-shaped and T-shaped).