Production of metal containers

摘要

A die for the toolpack of a wall-ironing apparatus for forming metal cans is laterally displaceable for accommodating misalignment of the wall-ironing punch from its central axis. Restoring force to return the die to its own central position is provided by pneumatically operated biassing elements. For increasing the restoring force available, those biassing elements which are on the upstream side of lateral die movement are rendered ineffective on the die by engagement with stops located at the central die position. Usually, as described, the die is one of a pair of dies coupled for lateral movement together.