The invention provides an
extrusion die and a method for
extrusion molding inside and outside reduction blank by the same, which relate to a die and a method for
extrusion molding blanks by the die, and are aimed to solve the problems that the adoption of the common blank extrusion molding die and method cannot mold a workpiece with an external shape of one end of a larger
diameter and the other end of a smaller
diameter, and the workpiece with an internal hole end of a larger
diameter, a bottom part of a smaller internal diameter and a long
axial length. The die is characterized in that a second
assembly is arranged on a lower die seat; a first
assembly is arranged on a second
assembly; the die holes of a first lower die and a second lower die are combined to form into a lower die cavity; a
cushion block and a discharging plate are detachably connected with a first pre-stressed ring; a convex die is arranged in the lower die cavity; the connection part of the convex die is arranged in a stepped through hole of a fixing plate of the convex die; and the fixing plate of the convex die is detachably connected with the
cushion block and an upper die seat. The method comprises the following steps of blanking, turning, heating, extruding and annealing treatments, wherein the
heating temperature is between 1100 DEG C and 1150 DEG C. With the adoption of the extrusion die and the method provided by the invention, the extrusion molding of inside and outside reduction blanks can be realized.