Patent ID: 6908221

Claim:
A method of processing polymer-based mixtures and compounds in a closed mixer, wherein the mixer comprises: a mixing chamber; a pair of rotors; and a pressing ram; wherein the pressing ram is movable between a resting condition, which allows introduction of material into the mixing chamber, and a working condition, wherein the method comprises: introducing the material into the mixing chamber; moving the pressing ram from the resting condition to an upper end-of-stroke position; and moving the pressing ram from the upper end-of-stroke position to a lower end-of-stroke position; wherein a position-time profile of the pressing ram is controlled during moving the pressing ram from the upper end-of-stroke position to the lower end-of-stroke position, wherein moving the pressing ram from the resting condition to the upper end-of-stroke position is preceded by introduction of at least one reinforcing filler of a polymer base into the mixing chamber, and wherein moving the pressing ram from the upper end-of-stroke position to the lower end-of-stroke position occurs during incorporation of the at least one reinforcing filler into the polymer base.