Patent ID: 8192670

Claim:
A tire forming mold comprising: a pair of side mold portions forming an outer surface of a side wall portion of a tire; an annular mold portion fitted to an outer side in a tire diametrical direction of the pair of side mold portions at a time of clamping the mold and forming an outer surface of a tread of the tire; the annular mold portion being constructed by a combination of sectors which are divided in a tire circumferential direction; and each of the sectors being capable of displacing in the tire diametrical direction, wherein a fitting diameter of the annular mold portion is set to be equal to or more than a fitting diameter of the pair of side mold portions, an annular rubber introduction groove extending along the tire circumferential direction is provided in a fitting surface of the annular mold portion, and a groove portion whose shallowest depth position has a depth (d 2 ) of between 0.1 and 1.3 mm is formed in an introduction port of the rubber introduction groove, wherein a back end surface of the rubber introduction groove is formed in such a manner as to come away from a fitting surface of the side mold portion incrementally in accordance with distance from the introduction port, and wherein when a sector displaces to the outer side in the tire diametrical direction, the back end surface of the rubber introduction groove catches a leading end of a pinch formed by the rubber introduction groove.