Cathode carbon vibration forming machine for aluminum and reducing die thereof

The utility model discloses a reducing die. The device comprises a box body and a lining plate, inner wall of box body is rectangular, the outer wall structure of the lining plate corresponds to the inner wall of the box body; the outer wall of the lining plate clings to the inner wall of the box body and is fixed on the inner wall of the box body; the inner wall of the lining plate comprises a first plate section and a second plate section which are connected with each other; the first plate section is positioned above the second plate section; the first plate section is rectangular; second plate section is trapezoidal, the inner diameter of the second plate section is gradually increased downwards from the joint of the second plate section and the first plate section; the trapezoidal second plate section forms a demolding angle with a wide lower part and a narrow upper part; the rectangular first plate section enables the gap between the heavy hammer and the lining plate to be small,so that the heavy hammer