Patent ID: 8117881

Claim:
A press-molding method for press-molding a bottom portion of a work piece having a closed-end shape between an inner die inserted into an inside end of the work piece and an outer die disposed on an outside of the work piece, comprising: gripping the work piece via a core adjusting chuck mechanism so that the work piece can move in an axial direction thereof; moving the inner die in the axial direction via an inner die moving mechanism so that the inner die is inserted into the inside end of the work piece; restricting movement of the inner die via a stopper mechanism so that the inner die is supported in a processing position; and moving the outer die in the axial direction of the work piece via an outer die moving mechanism so that the bottom portion of the work piece is press-molded between the outer die and the inner die in a state where the core adjusting chuck mechanism grips the work piece so that the work piece can move in an axial direction thereof and the stopper mechanism restricts movement of the inner die so that the inner die is supported in a processing position.