1: kneading action between the outer surface of the mixer rotor and the inner wall of the mixing chamber

because the surface of the rotor is made with spiral sharp edges, the gap formed between it and the mixing chamber is variable, and the small gap is between the edge of the mixer rotor and the inner wall of the mixing chamber. When the rubber material passes through this small gap, it is subjected to strong extrusion, shearing, and stretching effects. This effect is similar to the effect of the two roller distances of the open mill, but the effect is much greater than that of the open mill. This is because the speed gradient of the rubber between the rotating rotor and the fixed chamber wall is much larger than that of the open mill, and the transmission angle formed by the rotor sharp edge and the mixing chamber wall is sharp.

II: Mixing, stirring and extrusion between the two rotors of the mixer. The distance between each point on the elliptical surface of the two rotors of the

mixer and the axis of the rotor is not equal, so it has different circumferential speeds. Therefore, the gap and speed ratio between the two rotors of the mixer are not a constant value, but are different everywhere and change from time to time. The difference between the large value and the small value of the velocity gradient is several tens of times. The rubber material can be subjected to strong shearing, extrusion and stirring. The rubber material can be subjected to strong shearing, extrusion and stirring.

and because the mixer two rotor speed is different, its relative position is also changing. The capacity of the rubber material between the two rotors also changes frequently, resulting in a strong mixing and stirring effect.

III: Split, shear and exchange of upper and lower top plugs.

Due to the shunt effect of the lower top bolt edge and the different rotating speeds of the two rotors, the rubber can be folded and tamped in the left and right mixing chambers. Part of the compound in front of the mixer rotor on one side (high pressure area) is extruded behind the rotor of the opposite mixing chamber (low pressure area), and then brought into the hopper. Reciprocating each other.

In order to effectively exchange, a rotor must direct the compound into the gap behind the corresponding rotor edge. Otherwise, the exchange is prevented due to the pressure balance. This requires the two rotors to be turned into position for exchange, depending on the speed ratio. During the rotary motion of the

rotor, the positive pressure generated by the rubber material on the rotor at the spiral ridge is p '. According to the acting force and reaction force, the vertical acting force generated by the rotor at the protruding edge is P, and P is decomposed into circumferential force (radial acting force) Pr and tangential force Pt, where Pr acts to make the rubber material rotate around the axis of the rotor, and Pt acts to make the rubber material move axially.

Pt = P×tga

compound produces axial movement on the rotor ridge. There must be friction to prevent the compound from moving axially. The friction force T = Ptg @, because only Pt is greater than T, the compound can move axially. That is, a is greater than @, @ = 37-38, so a is greater than 38.

Therefore, the rubber material produces axial movement at the short edge of the rotor. Reciprocating cutting of rubber material: since a = 30 is less than @ at the long edge, the rubber material will not move axially but only produce circular motion, which plays the role of material transportation and rolling and kneading.