Pot-shaped magnetic core die with shrinkage percentage being 12

The utility model provides a pot-shaped magnetic core die with the shrinkage percentage being 12%. The die is composed of a female die body, an upper punch, a lower punch, a bottom plate and a core. The female die body is of a cylindrical structure internally provided with a circular groove, and the diameter of the outer circle of a press-formed blank of the die is d1, namely the diameter of the groove of the female die body. The size of an open crotch of a groove of the blank is d2, namely the external diameter of the bottom plate. A stem of the blank is arranged perpendicular to the bottom of the circular groove of a blank body, and the size of the outer circle of the stem is d3, namely the diameter of an inner hole of the bottom plate. The size of an inner hole of the stem is d4, namely the external diameter of the core of the die. The height of the outer circle of the blank is h1, and the depth of the circular groove of the blank is h2, wherein the ratio of d1 to d2 to d3 to d4 to h1 to h2 is 20.4 to 17.2