To provide a tire mold capable of enhancing not only exhaust efficiency at the time of vulcanization molding of a tire but also the durability appearance of the tire, the plug used in the vent hole of the mold and the tire manufactured using the mold.
A gap adjusting means 6 of a first embodiment is constituted so that the diametric cross-sectional shape of the exhaust hole 3 of a cylinder is formed into an oval shape while the cross-sectional shape crossing the axial direction of a valve 4 at a right angle is formed into a round shape and the parts of both of the maximum diameter C of the valve 4 and the minimum diameter A of the exhaust hole 3 are formed to come into contact with each other at two point positions opposed to each other. A gap (d) becoming constant always is formed at two mutually opposed side surface positions crossing the contact part at a right angle, that is, between the maximum diameter B of the exhaust hole 3 and the maximum diameter C of the valve 4. Further, in a second embodiment, the diametric cross-sectional shape of the exhaust hole 3 of the cylinder 2 is formed into a round shape and the cross-sectional shape crossing the axial direction of the valve 4 at a right angle is formed into an oval shape.
Takashi Noguchi
Kazuhiko Saishita