Patent ID: 9694330
Date: 2017-07-04
CPC Classifications: B01F,B29B

Claim:
1. An internal batch mixer with three-wing non-intermeshing rotors, comprising: a housing defining a mixing chamber, the mixing chamber having first and second substantially circular chamber cavities in open communication with one another at a central region of the mixing chamber; first and second non-intermeshing, counter-rotating winged rotors respectively rotationally mounted within the first and second substantially circular chamber cavities, wherein the central region of the mixing chamber defines an interacting mixing region between the first and second non-intermeshing, counter-rotating winged rotors; and means for driving counter-rotation of the first and second non-intermeshing, counter-rotating winged rotors with respect to one another, wherein each of the first and second non-intermeshing, counter-rotating winged rotors comprises a blade body and an axle, the blade body having first, second and third wings each having a substantially helical contour, a radial clearance between each of the first and second wings and an internal wall of the mixing chamber being defined by where e is the radial clearance and R c is a radius of each of the first and second substantially circular chamber cavities, said blade body having opposed first and second ends, such that a first portion of the blade body is defined between the first end thereof and an axial center thereof, and a second portion of the blade body is defined between the second end thereof and the axial center thereof, wherein the first portion is helically twisted by 60° in a first rotational direction and the second portion is helically twisted by 60° in a second rotational direction opposite the first rotational direction, a first twisted contour of the first portion being continuous with a second twisted contour of the second portion at the axial center.