1, small mixer at work, the relative rotation of the two rotors, in the future from the material feeding the mouth of the roller joints by the compression and shearing of the rotor, through the roll seam after the next top of the bolt is divided into two parts, respectively, along the front and rear room wall and the gap between the rotor back to the roll gap. 2, around the rotor flow in the one weeks, the material is everywhere subjected to shearing and friction, so that the temperature of the rubber material increased sharply, viscosity decreased, increased the rubber on the surface of the coordination agent wettability, so that rubber and the surface of the complex agent fully contact. With the rubber material together through the rotor and rotor clearance, the rotor and the top, the bottom of the chain, the interior wall of the gap, is cut and broken, the tensile deformation of rubber surrounded, stable in the crushing state. At the same time, the convex ribs on the rotor make the rubber material move in the axial direction of the rotor, stirring and mixing, so that the admixture is mixed evenly in the compound. With such repeated shear broken, plastic material repeatedly produced deformation and recovery deformation, the rotor convex ribs constantly stirring, so that the compound agent in the compound dispersed evenly, and achieve a certain degree of dispersion.