| 摘要 |
<p>A drawn container body for a can is produced from a circular, precoated sheet metal blank by forcing it through tooling comprising a plurality of similar dies (22) and punches (21); the first die (22) cups and irons the blank and the subsequent dies reduce the cup cross section and also iron the metal sheet. As the metal sheet is cupped or has its cross-section reduced, its thickness is increased so each die has an ironing land (22b) defining a clearance gap with the punch narrower than the thickened metal to remove the thickening. The final die ironing gap is about 0.001 inch (0.02 mm) narrower than the starting thickness of the blank. <IMAGE></p> |
