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    • 10. 发明申请
    • PROCESS AND EXPANDABLE FORMING DRUM FOR BUILDING TYRES FOR VEHICLE WHEELS
    • 用于车轮轮胎的过程和可膨胀成型鼓
    • WO2016157001A1
    • 2016-10-06
    • PCT/IB2016/051109
    • 2016-02-29
    • PIRELLI TYRE S.P.A.
    • MARCHINI, MaurizioDE COL, Christian
    • B29D30/12
    • B29D30/12
    • A forming drum comprises circumferentially consecutive sectors (24) that are radially movable between a contracted condition and an expanded condition in which the sectors (24) are radially moved away from a geometric axis (X-X) in order to define a radially external abutment surface ("S"). Each sector (24) has circumferentially opposite coupling portions (36a, 36b), each comprising circumferential projections (37) alternated with circumferential cavities (39). The projections (37) of each sector (24) are slidably engaged in the respective cavities (39) of circumferentially adjacent sectors. From at least one of the projections (37), at least one support wing (42) is extended having a first side (42a) and a second side (42b) that are respectively opposite. The first side (42a) coincides with a portion of the abutment surface ("S") and the second side (42b) at least partially overlaps one of the projections (37) belonging to an adjacent sector (24). A process for building tyres employing the aforesaid drum is also described.
    • 成形鼓包括周向连续的扇区(24),其可在收缩状态和扩展状态之间径向移动,其中扇区(24)径向移动远离几何轴线(XX),以限定径向外部邻接表面( “S”)。 每个扇区(24)具有周向相对的联接部分(36a,36b),每个部分包括与周向空腔(39)交替的圆周突起(37)。 每个扇区(24)的突起(37)可滑动地接合在周向相邻扇区的相应空腔(39)中。 至少一个突起(37)中,至少一个支撑翼(42)被延伸,具有分别相对的第一侧(42a)和第二侧(42b)。 第一侧(42a)与邻接表面(“S”)的一部分重合,并且第二侧(42b)与属于相邻区段(24)的突起(37)中的一个至少部分重叠。 还描述了用于制造使用上述鼓的轮胎的方法。