| 摘要 |
A case base (1; 1') for large-caliber ammunition, in which the case jacket (2) comprises a combustible material, with the case base (1; 1') comprising a metallic base plate (3) and a support ring (4; 4') that projects axially beyond the surface of the base plate (3) at its edge, and an elastomer or thermoplastic obturation ring (5; 5') that is disposed on the projectile side of the support ring (4; 4'). In order for the obturation ring (5; 5') to be secured simply to the support ring (4; 4') and removed again after the ammunition has been fired, the support ring (4; 4') has, on its inner surface (6) facing the obturation ring (5; 5'), a groove-shaped undercut (7), into which the end (8) of the obturation ring (5; 5') that faces the support ring (4; 4') extends with a form-fit and/or positive lockup.
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