Abstract: An apparatus for testing tires comprises a probe having a structure which adjusts to a superficial profile of the tire cavity and comprises an electrically insulating material. A chain mail portion connected to the structure comprises an electrically conductive material, and has a width to engage the surface of the cavity in the area of the crown and, at least partially, in the area of the sidewalls. A roller supports the tire and rotates it around a first central axis, and comprises a central core made of an electrically conductor material, and at least a coating layer, which is applied on the outside of the central core, and has an even thickness. The roller comprises an outer surface having a concave profile facing the tire. A high-voltage test system tests for defects in the carcass and comprises two electrodes defined by the central core and the chain mail portion.

Abstract: A method for the cold retreading of a tire comprising the following steps: a removal step, during which the tread is removed from the tire in order to expose an equatorial surface of a casing of the tire; a deposition step, during which a cushion and a pre-cured tread strip provided with a tread pattern are deposited around the equatorial surface of the casing; and a curing step, wherein the cushion arranged between the casing and the pre-cured tread strip is cured. The cushion is manufactured with a compound comprising 1 to 30 phr of at least one conductive material having a specific surface area which is greater than or equal to 300 m2/g and is chosen among graphite and graphene. The curing step comprises a connection step, wherein said cushion is connected to a heat/power source.

Abstract: A method for the cold retreading of a tire comprising the following steps: a removal step, wherein the tread is removed from the tire, exposing an equatorial surface of a casing of the tire; a deposition step, during which a cushion and a pre-cured tread strip provided with a tread pattern are deposited around the equatorial surface of the casing; and a curing step, wherein the cushion arranged between the casing and the pre-cured tread strip is cured. The cushion is manufactured with a compound comprising at least one conductive material in a quantity ranging from 5% to 20% by weight, having a specific surface area which is greater than or equal to 300 m2/g, and chosen among graphite and graphene. The curing step comprises a connection step, wherein said cushion is connected to a heat/power source.

Abstract: A method for the cold retreading of a tyre (1) comprising the following steps: —a removal step, during which the old, worn tread is removed from the tyre in order to expose an equatorial surface (2) of a casing (3) of the tyre (1); —a deposition step, during which a cushion (4) and a pre-cured tread strip (6) provided with a tread pattern are deposited around the equatorial surface (2) of the casing (3); and—a curing step, during which the cushion (4) arranged between the casing (3) and the pre-cured tread strip (6) is cured. The retreading method also comprises a conductive interposition step, during which a conductive adhesive compound (5) is deposited between said cushion (4) and said pre-cured tread strip (6) and/or between said cushion (4) and said casing (3). The conductive adhesive compound (5) comprises at least one conductive material in a quantity ranging from 5 to 20% by weight and chosen among graphene, graphite and a carbon black having a surface area which is greater than or equal to 300 m2/gr.

Abstract: A method for the cold retreading of a tyre (1) comprising the following steps: a removal step, during which the old, worn tread is removed from the tyre in order to expose an equatorial surface (2) of a casing (3) of the tyre (1); a deposition step, during which a cushion (4) and a pre-cured tread strip (6) provided with a tread pattern are deposited around the equatorial surface (2) of the casing (3); and a curing step, during which the cushion (4) arranged between the casing (3) and the pre-cured tread strip (6) is cured. The cushion (4) is manufactured with a compound comprising 1 to 30 phr of at least one conductive material chosen among graphite, graphene and a carbon black having a surface area which is greater than or equal to 300 m2/gr. The curing step comprises a connection step, during which said cushion (4) is connected to a heat or power source (S).