... -piece tinplate can making; 2. Adopt digital control technology; 3. Human-computer-interface; 4. Automatic line. The line consists of Automatic ... -body Welder (the heart of three-piece tinplate can-body making line), Seam Coating and Curing System, Conveyors, Necker, Beader, ... etc. It combines with the end-making line to be a fully tinplate can manufacturing line, suitable for various can sizes and ...