Diaphragm manufacturing device

The utility model discloses a diaphragm manufacturing device which comprises a die body, the upper surface and the lower surface of the die body are parallel to each other, a die cavity is formed in the upper surface of the die body in a concave mode, a floating die plate consistent with the cross section of the die cavity in shape is arranged in the die cavity, and the floating die plate can be in sliding fit with the die cavity in the depth direction of the die cavity. An adjusting screw hole is formed in the bottom of the die cavity in a penetrating mode, the center line direction of the adjusting screw hole is perpendicular to the upper surface of the die body, an adjusting stud matched with the adjusting screw hole in a threaded mode is arranged in the adjusting screw hole, and the end, facing the floating die plate, of the adjusting stud abuts against the inner side face of the floating die plate. The floating die plate can abut against the bottom of the die cavity or extend out of the die cavity. The m