| 摘要 |
An apparatus for producing a battery case which has a tubular shape with a closed end and which houses an electricity-generating element, the apparatus including: a die assembly including a blanking die, a drawing die, a redrawing die and an ironing die which have respective die holes having mutually different sizes and which are immovably and coaxially arranged in series in the order of the sizes of the die holes; a first punch, a second punch and a third punch which are disposed coaxially with respect to the die assembly such that the first through third punches can be inserted into the corresponding die holes of the respective dies; and a moving mechanism which permits the first through third punches to be inserted into the corresponding die holes.
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