Tire building method and rotational transfer device for drum transfer support base in tire building process

A tire building apparatus, comprising:

• a first transfer section and a second transfer section each provided with a travel rail, the travel rails of the first and second transfer sections being parallel to each other,
• a first drum transfer support base and a second drum transfer support base each provided with a rotating support for supporting a building drum rotatably,
• a plurality of devices positioned along the travel rail of the first transfer section for building tire components on a supported building drum and a device positioned along the travel rail of the second transfer section for building a tire component on a supported building drum,
• a rotational transfer device comprising a rotating table having an axis of rotation intermediate between the first transfer section and the second transfer section,
• the rotational transfer device further comprising two pairs of rails corresponding to extensions of the travel rails of the first and second transfer sections in a rotation stopped state to receive the first and second drum transfer support bases, each of which enters from the rail of the first or second transfer section, to enable the first and second drum transfer support bases to rotationally transfer to the other transfer section at the same time.