Patent ID: 8286459

Claim:
A method for producing a two-piece can, wherein a circular disk of a laminated steel sheet having a thermoplastic resin coating layer is subjected to multistage forming to form a final formed body having a height h, a maximum radius r, and a minimum radius d, wherein r may be equal to d, comprising: forming the circular disk so that the height h, maximum radius r, and the minimum radius d of the final formed body satisfy the relationships 0.1â‰¦d/Râ‰¦0.25 and 1.5â‰¦h/(Râˆ’r) â‰¦4 with respect to a radius R of the circular disk, before forming, having the same weight as that of the final formed body; and during the forming, subjecting a formed body to heat treatment at a temperature of not less than a melting point of the thermoplastic resin, but not more than a temperature 30Â° C. higher than the melting point.