Automatic duplex slitter machine is suitable for canning enterprises to shear tinplate with high precision, and is a shearing equipment that must be equipped for high-speed resistance welding machines.

Shearing is also called cutting. It is the first process of three-piece can manufacturing and also a process of tinplate can making. Its purpose is to complete the cutting of printed and coated sheets into independent small pieces according to the specified size requirements to meet the production needs of the next resistance welding process. Since the resistance welding machine has high requirements for the shearing accuracy of the sheet, people currently use disc shearing technology; traditional manual shearing is no longer used, and duplex rotary slitter machines are now used.