PROCESS FOR PRODUCING TYRES

摘要

Process for producing tyres (3) comprising building a green tyre comprising two bead structures (6), each comprising a bead filler (7a), wherein the bead filler or another rigid component of the green tyre comprises a final elastomeric compound produced by feeding elastomeric polymer (102) and reinforcement filler (103) to a first batch mixing device (101); mixing and dispersing the reinforcement filler in the elastomeric polymer and unloading the obtained elastomeric compound; feeding the obtained elastomeric compound (104), along with at least 5 phr of reinforcement resin (111), to a continuous mixing device (106) of intermeshing and co-rotating twin-screw or multi-screw type or of planetary type; and mixing the reinforcement resin in the elastomeric compound and unloading the obtained elastomeric compound; feeding the obtained elastomeric compound (108) along with the components capable of facilitating the cross-linking (113) to a second batch mixing device (501) and mixing in a manner so as to obtain the final elastomeric compound (112), wherein the first and second batch mixing device have two counterrotating rotors.