Method for retreading a tire using a dual heating effect
AssigneesCompagnie Generale Des Etablissements Michelin, Michelin Recherche et Technique S.A.
InventorGregory MARCET
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Abstract
The method includes the step of passing an electric current through at least one wire that is situated between a carcass of a tire casing and a tread. The method also includes the step of calculating a value of a temperature of the wire as a function of a relative value of the current. The method proceeds with the step of controlling the current as a function of the temperature value calculated.
Claims10
Method for retreading a tyre casing (2), characterized in that:
- an internal volume of a casing carcass (4) is put under negative pressure,
- a vulcanized tread (6) in the form of a closed ring is provided, and
- the tread is laid on the carcass,
- the carcass and/or the tread bearing a thermoplastic or hot-melt bonding layer (10).
Method according to the preceding claim, wherein, before the internal volume of the carcass is put under negative pressure, said carcass is mounted on a rim (16).
Method according to at least either one of the preceding claims, wherein the negative pressure is brought about by lowering a pressure in the internal volume by at least 0.5×105 Pa, and preferably by at least 0.8×105 Pa.
Method according to at least any one of the preceding claims, wherein lobes (12) are generated on the carcass.
Method according to at least any one of the preceding claims, wherein pressure is applied to at least one point on an external face of the carcass.
Method according to the preceding claim, wherein the pressure is applied by means of a member and the member is removed before the laying step.
Method according to at least any one of the preceding claims, wherein the tread has a longitudinal rigidity greater than 1 GPa.
Method according to at least any one of the preceding claims, wherein the bonding layer is heated.
Method according to at least any one of the preceding claims, wherein the bonding layer comprises a thermoplastic elastomer.
Method according to at least any one of the preceding claims, wherein, after the tread has been laid on the carcass, the latter is inflated.
Dependencies are inferred from the claim text.