Patent ID: 8770251
Filing Date: 2014-07-08
Classification: B29D

Abstract:
1. Tyre building drum ( 1 ) for building an unvulcanised tyre using rubber tyre components, wherein the tyre building drum comprises a central drum shaft ( 4 ) and two drum halves ( 5 , 6 ) arranged at least almost substantially symmetrical with respect to the centre ( 3 ) of the tyre building drum ( 1 ) and around the drum shaft ( 4 ), wherein in the drum shaft ( 4 ) one threaded spindle ( 7 ) is arranged, wherein on either side of the centre ( 3 ) of the tyre building drum ( 1 ) the thread has an equal-sized pitch yet in a mutually opposite axial direction of the one threaded spindle ( 7 ), wherein on either side of the centre ( 3 ) of the tyre building drum ( 1 ) a respective one from a pair of driving nuts ( 8 ) is arranged on the one threaded spindle ( 7 ), wherein each driving nut ( 8 ) is fixedly connected to a respective one of the drum halves ( 5 , 6 ) via a respective connection part ( 9 ), wherein the drum shaft ( 4 ) is provided with two drum shaft slots ( 10 ), each one accommodating a respective one of the connection parts ( 9 ), wherein both drum halves ( 5 , 6 ) are movable in an axial direction of the tyre building drum ( 1 ), wherein each drum half (