| 摘要 |
Assembly comprising a tyre drum ( 1 ) including a turn-up mechanism ( 5 ) for use in building an unvulcanized tyre, wherein the tyre drum is provided with a central shaft ( 2 ), two bead clamps ( 11 ) and bead inner supports ( 13 ) placed around the shaft and axially spaced apart on either side of a centre plane of the tyre drum, means for radially expanding a part of the tyre components that is situated within the bead clamps, wherein the tyre drum on either side outside of the bead clamps is provided with a first and a second set of turn-up arms ( 5 ), respectively, wherein the arms at a first free end oriented towards the bead clamps are provided with a turn-up means, particularly a turn-up roller ( 7 ) or turn-up band, wherein the shaft ( 2 ) is designed hollow having a circumferential wall having an outer diameter, wherein each set of arms ( 5 ) with accompanying bead clamps ( 11 ) and bead inner supports ( 13 ) is disposed on a casing ( 10 ), of which the inner diameter corresponds with the outer diameter of the circumferential wall of the hollow shaft, wherein the assembly comprises at least two pairs of casings ( 10 ), wherein the first pair.
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