METHOD FOR FORMING A TIRE COMPONENT AND PNEUMATIC TIRE

A method of forming a tire component comprising a first rubber compound and a second rubber compound is disclosed. The method comprises the steps of: (i) extruding a first rubber compound through a main extruder (20) and a main gear pump (25); (ii) extruding a second rubber compound through a second...

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Bibliographische Detailangaben
Hauptverfasser:	Dyrlund, Christopher David, Koch, Brian Richard, Kaes, Christian, Maitre, Bruno Pierre, Burg, Gary Robert
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING DEVICES OR ARRANGEMENTS RELATED TO TYRES INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES MAKING GRANULES OR PREFORMS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING TYRE CHANGING OR REPAIRING TYRE INFLATION VEHICLE TYRES VEHICLES IN GENERAL WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A method of forming a tire component comprising a first rubber compound and a second rubber compound is disclosed. The method comprises the steps of: (i) extruding a first rubber compound through a main extruder (20) and a main gear pump (25); (ii) extruding a second rubber compound through a second extruder (40) and a second gear pump (42) into the main extruder (20); (iii) varying or tuning the ratio of the first compound to the second compound by adjusting the speed of the main gear pump (25) and/or the speed of the second gear pump (42) to obtain a first blend ratio of the first compound to the second compound and then applying a first rubber profile directly onto a tire building machine (95) to form a first zone of rubber having the first blend ratio; and (iv) adjusting the speed of the main gear pump (25) and/or the second gear pump (42) to obtain a second blend ratio of the first compound to the second compound, and then applying a second rubber profile formed of the first compound and the second compound to form a second zone of rubber having the second blend ratio. Also, a pneumatic tire comprising a tire component with two or more adjacent zones of different mixtures of rubber is disclosed. The transition in terms of rubber composition from one of said zones to an adjacent zone is continuous.