| 摘要 |
The present invention provides a necking system including a plurality of necking dies each necking dies having an at least partially non-polished necking surface (10) and a non-polished relief (20) following the necking surface. The present invention further provides a method of necking an metal container including providing an metal blank; shaping the blank into a bottle stock (1-14); and necking the metal bottle stock (1-14), wherein necking includes at least one necking die having an at least partially non-polished necking surface (10). |
