| 摘要 |
A tire mold is configured in such a manner that a pair of upper and lower side plates, a sector, a sector shoe which holds the sector, and an actuator are arranged in sequence from the inside toward the outside in the radial direction of the tire. The tire mold is characterized in that flange-shaped rings are respectively provided to the outer-diameter sections of the pair of upper and lower side plates, and in that the flange-shaped rings are formed in such a manner that, when the mold is fully closed and is at normal temperature, protrusions formed on the upper and lower parts of the sector shoe are in contact with the outer-diameter sections of the flange-shaped rings to position both the sector shoe and the sector relative to the pair of upper and lower side plates, and when the temperature of the mold reaches a vulcanization temperature in the fully closed state, the inner-diameter section of the sector comes into contact with the outer-diameter sections of the side plates and also the protrusions formed on both the upper and lower parts of the sector shoe come into contact with the outer-diameter sections of the flange-shaped rings. The tire mold thus provided does not cause misalignment between the axes of the upper and lower dies and can prevent the wear of the sector. |
