A powder blender for a system for continuous processing of powder products comprises a horizontal blending tube extending along an axis from a first end to a second end. The horizontal blending tube comprises at least one inlet configured to receive the powder products to be blended, and at least one outlet configured to discharge the powder products after blending. At least two blending devices are positioned in the blending tube and arranged successively along the axis of the blending tube. At least two actuators, wherein each of the at least two actuators is configured to operate one of the at least two blending devices such that the at least two blending devices are actuated differently from each other.

A mixer (1) for mixing a mixing material (13) in polymer processing comprises a mixing chamber (2) and more than two rotors (6a-6d) arranged in the mixing chamber (2). In particular, the rotors (6a-6d) can be configured to interlock.

A mixer (1) for mixing a mixing material (13) in polymer processing comprises a mixing chamber (2) and more than two rotors (6a-6d) arranged in the mixing chamber (2). In particular, the rotors (6a-6d) can be configured to interlock.