| 摘要 |
PURPOSE: A bladder of tire vulcanizing apparatus is provided to expand the bladder inside a green tire, thereby molding the green tire according to shapes of molds. CONSTITUTION: A bladder of tire vulcanizing apparatus comprises an ear parts(1,2) and an expansion part(3). The ear parts are installed in upper and lower parts in order to combine with a metal mold. The expansion part is installed between the ear parts. A vent line is formed on surface of the expansion part. One or more of linear flexural grooves(5) are formed in an area which is in contact with a bead part. Depth of the linear flexural groove is 0.5-2 times of depth of an air exhaust groove. Width of the linear flexural grooves are 0.5-2 times of width of the air exhaust grooves.
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