Patent ID: 6312148
Filing Date: 2001-11-06
Classification: B29B,B29C

Abstract:
A continuous mixing process for preparing a rubber compound in an elongated mixing chamber defined by the volume between the radially inner surface of a stator and the radially outer surface of at least one rotor in rotation in said stator, comprising:continuously introducing in the mixing chamber different constituents, including at least one base elastomer and at least silica as reinforcing filler, said constituents being such that their mixing is capable of producing inside the mixing chamber the appearance of at least one product in gaseous phase,channeling the different constituents from their point of introduction to an outlet of the mixing chamber, andcirculating, through a discrete groove in the rotor in open communication with at least part of the mixing chamber, a stream of gas against the direction of flow of the materials in the mixing chamber, so as to carry said gaseous phase across a gas circulation zone within the mixing chamber between a downstream gas inlet and an upstream gas outlet.