| 摘要 |
The invention provides a method of converting a tire building drum (10) into a sleeveless tire building drum (10). The method comprises the steps of providing a tire building drum having a center sleeve (16), removing the center sleeve (16); providing a plurality of cover plates (180) and a plurality of segments (186, 188) located underneath the cover plates (180), the segments connected to radially oriented pistons (194) for radial movement of the center section; providing a plurality of holes (210) on said cover plates (180), connecting the holes (210) to a fluid manifold (212), and connecting the manifold (212) to a vacuum source. The invention also provides a sleeveless tire building drum which includes a rotatable drum comprising a left and right section (140, 160) and a center section (120). The center section (120) is radially expandable, and the left and right sections are axially movable. The center section has a plurality of cover plates (180) mounted on the circumference of the center section, the cover plates having an outer surface having a plurality of holes (210), and a inner surface having a manifold (212) connected to the plurality of holes (210).
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