in order to manufacture a discharging roller which discharges a recording medium from a recording apparatus , there are a first die formed with a first recess extending in an axial direction of a shaft portion of the discharging roller , and a second die formed with a second recess extending in the axial direction . the first die and the second die are combined such that the first recess and the second recess face to form a continuous cavity . synthetic resin is injected into the cavity to mold a bore portion of the shaft portion .