A liquid mixing process for producing an elastomeric composition as a function of a selected elastomeric composition recipe, the process comprising the following steps: providing an emulsion stored in a liquid phase in an emulsion reservoir of an emulsion storage installation; providing a charge material stored in a solid phase in a discharge hopper of a charge dosing system; providing a mixing installation comprising an extruder disposed in a corresponding barrel having multiple pre-defined production zones (24a, 24b, 24c, 24d) along which a mixture is prepared from the emulsion and the charge material and an egress extent from which the mixture is discharged as the elastomeric composition, wherein the production zones comprise: a feeding zone along which the emulsion and the charge material are fed directly to the extruder; a kneading zone defined downstream of the feeding zone along which the extruder realizes fine dispersion of charge particles in the emulsion; a drying zone defined downstream of the kneading zone along which the extruder controllably eliminates residual water from the mixture; and a mixing zone defined intermediate the drying zone and the egress extent of the mixing installation, and along which the extruder advances the mixture toward the egress extent and having a termination extent coextensive with the egress extent from which the mixture is discharged; feeding a predetermined volume of the emulsion from the emulsion reservoir and a predetermined volume of the charge from the discharge hopper directly to a feeding zone of the mixing installation; conveying the mixture from the feeding zone toward the egress extent such that a residence time of the mixture in each production zone is controlled prior to transport of the mixture to a subsequent production zone; and discharging the elastomeric composition from the mixing installation. providing an emulsion stored in a liquid phase in an emulsion reservoir of an emulsion storage installation; providing a charge material stored in a solid phase in a discharge hopper of a charge dosing system; providing a mixing installation comprising an extruder disposed in a corresponding barrel having multiple pre-defined production zones (24a, 24b, 24c, 24d) along which a mixture is prepared from the emulsion and the charge material and an egress extent from which the mixture is discharged as the elastomeric composition, wherein the production zones comprise: a feeding zone along which the emulsion and the charge material are fed directly to the extruder; a kneading zone defined downstream of the feeding zone along which the extruder realizes fine dispersion of charge particles in the emulsion; a drying zone defined downstream of the kneading zone along which the extruder controllably eliminates residual water from the mixture; and a mixing zone defined intermediate the drying zone and the egress extent of the mixing installation, and along which the extruder advances the mixture toward the egress extent and having a termination extent coextensive with the egress extent from which the mixture is discharged; feeding a predetermined volume of the emulsion from the emulsion reservoir and a predetermined volume of the charge from the discharge hopper directly to a feeding zone of the mixing installation; conveying the mixture from the feeding zone toward the egress extent such that a residence time of the mixture in each production zone is controlled prior to transport of the mixture to a subsequent production zone; and discharging the elastomeric composition from the mixing installation. a feeding zone along which the emulsion and the charge material are fed directly to the extruder; a kneading zone defined downstream of the feeding zone along which the extruder realizes fine dispersion of charge particles in the emulsion; a drying zone defined downstream of the kneading zone along which the extruder controllably eliminates residual water from the mixture; and a mixing zone defined intermediate the drying zone and the egress extent of the mixing installation, and along which the extruder advances the mixture toward the egress extent and having a termination extent coextensive with the egress extent from which the mixture is discharged; feeding a predetermined volume of the emulsion from the emulsion reservoir and a predetermined volume of the charge from the discharge hopper directly to a feeding zone of the mixing installation; conveying the mixture from the feeding zone toward the egress extent such that a residence time of the mixture in each production zone is controlled prior to transport of the mixture to a subsequent production zone; and discharging the elastomeric composition from the mixing installation.