The tinplate is decorated and coated by metal printing machine, then cut as blank size by duplex slitter or gang slitting machine, and the can body welder will form the round can body by resistance welding technology, then the welding seam will be coated by wet lacquer or powder, and cured by induction oven. After the can body if completed, the shape forming machine will process the can as rectangular, square or round according to the product design. Then the can will be detected by leak tester and packaged by palletizer and wrapper.
The tin plate sheet is printed by the metal decorating line and coating line, then sent to the stamping press to form the basic shell, if the feeder is strip feeder, the tinplate needs to cut as strips firstly, if the feeder is sheet feeder, the sheet can be stamped directly. After the cupping press, the sheet are conveyed to trimming press to complete the products.
For the decorative tin box made by lock seam, it is not made by welding or punching, it is made as folded seam. The combined seam locking machine for bodymaker is necessary, then the sealer and flanger etc will complete the whole set of tin box.