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1. (WO2018127416) PNEUMATIC TYRE COLD RETREADING METHOD AND PLANT

Pub. No.:    WO/2018/127416    International Application No.:    PCT/EP2017/083780
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Thu Dec 21 00:59:59 CET 2017
IPC: B29D 30/56
B29D 30/68
Applicants: BRIDGESTONE EUROPE NV/SA
Inventors: LELIO, Luca
Title: PNEUMATIC TYRE COLD RETREADING METHOD AND PLANT
Abstract:
Pneumatic tyre (2) cold retreading method and plant (1); the old worn tread strip is removed from the pneumatic tyre (2) in order to expose a equatorial surface (4) of a casing (5) of the pneumatic tyre (2); the equatorial surface (4) of the casing (5) is skived in order to remove any local damage; a green rubber cushion (8) and a pre-vulcanized tread strip (9) without a pattern are wound about the equatorial surface (4) of the casing (5); the green rubber cushion (8) inserted within the pneumatic tyre (2) between the casing (5) and the tread strip (9) is vulcanized; and a pattern is engraved on the tread strip (9) wound about the equatorial surface (4) of the casing (5) after the vulcanization of the pneumatic tyre (2). During vulcanization, the pneumatic tyre (2) is maintained at ambient pressure and radial pressure is mechanically applied to the tread strip ( 9).