Patent ID: 7191632

Claim:
An apparatus for manufacturing a resin-coated metal seamless can body having a bottom portion by redrawing, by redrawing and ironing, or by ironing a cup-shaped in-process material formed by drawing a resin-coated metallic sheet covered with a thermoplastic resin on both sides, by using a punch and a die, comprising: heating means for heating the die, wherein the heating means does not heat the die prior to the forming process, and the heating means heats the die when the forming process can be carried out by the punch and die; means for feeding water at a constant temperature of between 20 and 80° C. into the punch during the process of forming the can body; first heating means for heating the outer surface of the punch prior to starting or restarting the process of forming the can body, so that the surface temperature of said punch is higher than that of the cup-shaped in-process material prior to starting the process of forming the can body, and the temperature of the punch is approximately equal to the desired temperature required to continuously form a plurality of can bodies and the heating of the punch is halted just prior to starting or re-starting the process of forming the can body; and the process of forming the can body is carried out using the heated punch.