Mold for forming a tire and tire production method

A mold for forming a tire for vulcanization molding of an unvulcanized raw tire into a tire, the mold comprising:

• an annular tread molding part which is divided into a plurality of segments arranged in a circumferential direction and which is configured to be opened and closed by moving each of the segments in a radial direction, wherein
• each of the segments includes
• a holder to be driven toward a radially outer side when the tread molding part is opened,
• a plurality of design surface dividing mold parts, each of which includes a tread design surface for forming a tread of the tire and which are disposed in a circumferentially arranged manner on a radially inner side of the holder, and
• a plate spring member which is disposed between the holder and the plurality of the design surface dividing mold parts and to which the plurality of the design surface dividing mold parts are fixed and in which both ends of the plate spring member in a circumferential direction are fixed to the holder, and
• when the tread molding part is opened after vulcanization molding of the tire, by elastic deformation of the plate spring member toward a radially inner side, the plurality of the design surface dividing mold parts are moved in a direction away from the holder with the plurality of the design surface dividing mold parts being rotated around an axis parallel to an axis of the tread molding part.