| 摘要 |
Apparatus for altering the cross-sectional shape of can bodies on a turret which can be driven in rotation about a central axis, a plurality of expanding mandrels are arranged all around the central axis. They are each essentially composed of a supporting member which is secured to the turret and defines an expanding-mandrel axis, a plurality of segmental bars which are arranged all round the expanding-mandrel axis and are guided on the supporting member for radial adjustment, and a wedge which is displaceable along the expanding-mandrel axis to spread the segmental bars apart. The wedges are displaceable in succession, by a common actuating member, during one revolution of the turret. The actuating member is a central cam member on which each of the wedges is supported at least during a portion of each revolution of the turret corresponding to the distance between two adjacent expanding mandrels.
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