Method for manufacturing a rubber composition

A process for the manufacture of a rubber composition comprising as base elastomers, reinforcing fillers, additives and a vulcanization system, comprising the following stages:

• A—using a continuous mixing device comprising a mixing chamber comprising at least one rotor rotating in a stator and extending between an upstream end and a downstream end, between which the material gradually advances, and comprising appliances for metering and forced introduction of the base elastomer or elastomers, driving back the base elastomers through a pipeline emerging upstream of the mixing chamber, a starting rubber composition comprising reinforcing fillers is produced, wherein said produced starting rubber composition does not include the vulcanization system, the operating parameters for the continuous mixing device being chosen so that:
• a—the residence time of the elastomer in the mixing chamber is between 20 and 60 seconds,
• b—the specific energy conferred on the rubber composition is between 2000 joules/gram and 5000 joules/gram,
• B—at the outlet for the starting rubber composition from the mixing chamber, the temperature of the said starting rubber composition is lowered to a temperature of less than 140° C. in less than 5 minutes.