Method for building belt assemblies for tyres for vehicle wheels

A method for building belt assemblies for tyres for vehicle wheels, comprising:

• building a crossed belt structure on a substantially cylindrical first forming drum in a first working area;
• selecting, according to a type of tyre to be produced, whether to build a belt assembly having a cylindrical shaping or a belt assembly having a toroidal shaping;
• wherein, in order to build a belt assembly having a cylindrical shaping, said method comprises:
• depositing at least one zero degrees belt layer on said first forming drum in a radially outer position with respect to said crossed belt structure, and in a second working area arranged downstream of said first working area with reference to a first movement direction;
• and wherein, in order to build a belt assembly having a toroidal shaping, said method comprises:
• picking up said crossed belt structure from said first forming drum;
• toroidally shaping said crossed belt structure in a first service area arranged downstream of said second working area with reference to said first movement direction;
• transferring said toroidally shaped crossed belt structure onto a second forming drum;
• and
• depositing at least one zero degrees belt layer on said second forming drum in a radially outer position with respect to said toroidally shaped crossed belt structure, and in the second working area arranged downstream of said first working area with reference to said first movement direction.