Patent ID: 7007736

Claim:
A die forming method for forming a molded product having a female-thread section comprising: a filling process in which a fluidic material is filled into a die including a core pin having a screw-shaped portion, which is made of a steel material, shaped in correspondence with the female-thread section; a solidification process in which the fluidic material filled in the filling process is cooled and solidified to form the molded product; and a thread-drawing process in which the screw-shaped portion of the core pin is drawn while being rotated from the molded product after the solidification process, wherein the fluidic material filled in the filling process is a magnesium-alloy material, wherein a plurality of molded products are formed over a plurality of times; and wherein a temperature of the core pin is adjusted to be at a substantially same pre-heating temperature when the thread-drawing process is performed for the plurality of times.