摘要:
An annular metal mould for forming a tyre tread is constructed by assembling a plurality of metal sector moulds (2) to be separable in the circumferential direction, and all or some of the metal sector moulds (2) are constructed of a plurality of subsidiary parts (3) separable in the axial direction as well as in the circumferential direction. Joining surfaces (14, 15) between the metal sector moulds (2) themselves each consisting of a plurality of the subsidiary parts (3) are formed of contour surfaces having the arbitrary shape of the subsidiary parts.