CPC B29D 30/305 (2013.01) [B29D 30/0681 (2013.01); B29D 30/20 (2013.01); B29D 30/245 (2013.01); B29D 30/246 (2013.01); B29D 30/3014 (2013.01); B29D 30/3042 (2013.01); B29D 30/3057 (2013.01); B60C 9/08 (2013.01); B29D 2030/0682 (2013.01); B29D 2030/086 (2013.01); B29D 2030/3078 (2013.01); B29D 2030/3085 (2013.01); B29K 2105/256 (2013.01); B60C 2009/0408 (2013.01)] | 20 Claims |
1. An apparatus for building tyres for vehicle wheels, comprising:
a building drum comprising a central section axially interposed between two half-parts to define a substantially cylindrical deposition surface, the two half-parts being distinct from and engageable with the central section; and
first forming devices configured for forming a carcass sleeve on the building drum,
wherein said first forming devices comprise laying devices configured for laying circumferentially consecutive strip-like elements around a circumferential extension of the deposition surface of the building drum,
wherein said deposition surface of the building drum comprises:
two axially external terminal portions defined by the two half-parts; and
an intermediate portion defined by the central section, extending across an axial symmetry plane of the deposition surface and axially interposed between the two terminal portions, the central section being in a radially inner position with respect to the two terminal portions,
the two half-parts having respective frustoconical zones that are tapered from respective axially outer edges defining a maximum diameter of the deposition surface, towards respective axially inner edges of the half-parts overlapping with the central section,
wherein the intermediate portion defines an application diameter of the deposition surface at said axial symmetry plane, the two terminal portions defining along their entire extension a diameter of the deposition surface that is greater than the application diameter.
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