Abstract: Manufacturing of a sipe blade at a low cost and in a short time, and shortening of a manufacturing period and reduction in cost of a tire vulcanizing mold are achieved. A metal wire material is subjected to rolling and molding processing, and subsequently is subjected to heat treatment to form an intermediate material. The intermediate material is cut off and a hole is formed therein, and the sipe blade is thereby manufactured.

Abstract: Split dies include an upper die and a lower die for casting small segments constituting tread pattern forming portions of a tire mold. The lower mold includes a telescopic die having an upper surface forming a die bottom wall having a configuration corresponding to the tread pattern forming portions of the small segments. The lower mold further includes a main die having a cavity for receiving the telescopic die and having side walls surrounding the cavity to form die inner walls whose configuration corresponds to side walls of the small segments.