| 摘要 |
The present invention relates to a multi pressure tire bladder with an effect of having all sides of the internal cylindrical surface of the tire evenly pressured by additionally pressuring parts provided with an insufficient pressure in a first expansion unit through a second expansion unit that provides at least one additional space to be partitioned on the side walls of the first expansion unit expanded to fill up inside of the tire by a heat carrier during a curing process. Furthermore, the second expansion units are formed on both ends of the side wall toward the direction of the tire width of the first expansion unit in parallel with the bead unit of the tire. Hence, an additional pressure is impacted on half-finished goods such as an apex and rim flange, etc. contained in the bead unit enabling a stable formation, through which a stable carcass line is created and a durability of the tire is also enhanced. |
