CPC F42B 5/36 (2013.01) [F42B 5/285 (2013.01)] | 19 Claims |
19. A method of manufacturing a bottom piece of a cartridge case, comprising:
performing a cold forming process on a metal blank to form a hollow casing section closed at a rear side by an ignition surface;
forming a bottom flange on an exterior of the hollow casing section;
pressing on an inside surface of the hollow casing section to form a cone section, wherein the cone section expands in a tulip or flower-like manner and has a cone-shaped inner contour; and
pressing the cone-shaped inner contour to form: a recess configured to receive a casing sleeve of the cartridge case, and a receiving chamber configured to receive an ignition charge.
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