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Share the mechanical effect of rubber material in internal mixer!

Share the mechanical effect of rubber material in internal mixer!

  • Categories:Company news
  • Author:
  • Origin:
  • Time of issue:2020-04-18
  • Views:3

(Summary description)Because the surface of the rotor has a spiral sharp edge, the gap between it and the mixing chamber is variable, and the small gap is between the edge of the rotor of the mixer and the wall of the mixing chamber. When the rubber material passes through this small gap, it is strongly squeezed, sheared and stretched, which is similar to the function of the distance between two rolls of the open mill, but the effect is much greater than that of the open mill. The reason is that the velocity gradient between the rotating rotor and the fixed chamber wall is much larger than that of the open mill, and the transmission angle between the rotor tip and the mixing chamber wall is sharp.

Share the mechanical effect of rubber material in internal mixer!

(Summary description)Because the surface of the rotor has a spiral sharp edge, the gap between it and the mixing chamber is variable, and the small gap is between the edge of the rotor of the mixer and the wall of the mixing chamber. When the rubber material passes through this small gap, it is strongly squeezed, sheared and stretched, which is similar to the function of the distance between two rolls of the open mill, but the effect is much greater than that of the open mill. The reason is that the velocity gradient between the rotating rotor and the fixed chamber wall is much larger than that of the open mill, and the transmission angle between the rotor tip and the mixing chamber wall is sharp.

  • Categories:Company news
  • Author:
  • Origin:
  • Time of issue:2020-04-18
  • Views:3
1： The kneading effect between the outer surface of the mixer rotor and the wall of the mixing chamber1： The kneading effect between the outer surface of the mixer rotor and the wall of the mixing chamber
 
Because the surface of the rotor has a spiral sharp edge, the gap between it and the mixing chamber is variable, and the small gap is between the edge of the rotor of the mixer and the wall of the mixing chamber. When the rubber material passes through this small gap, it is strongly squeezed, sheared and stretched, which is similar to the function of the distance between two rolls of the open mill, but the effect is much greater than that of the open mill. The reason is that the velocity gradient between the rotating rotor and the fixed chamber wall is much larger than that of the open mill, and the transmission angle between the rotor tip and the mixing chamber wall is sharp.and the transmission angle between the rotor tip and the mixing chamber wall is sharp.
 
2： Mixing and extrusion between two rotors of internal mixer.
The distance between each point on the elliptical surface of the two rotors of the internal mixer and the axis line of the rotor is not equal, so it has different peripheral speed. Therefore, the clearance and speed ratio between the two rotors of the internal mixer are not a constant value, but are different everywhere and constantly changing. The difference between the big value and the small value of the velocity gradient is dozens of times. The rubber material can be sheared, squeezed and stirred strongly.
 
Because of the different rotating speeds of the two rotors of the internal mixer, the relative positions of the two rotors also change at any time. The capacity of the rubber between the two rotors also changes frequently, resulting in a strong mixing and stirring effect.
 
3： Shunting, shearing and exchange of the upper and lower roof bolts.
Due to the shunting effect of the edge of the lower top bolt 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 rubber (high pressure area) in front of the mixer rotor on one side is squeezed behind the mixer rotor on the opposite side (low pressure area), and then it is brought into the hopper. Back and forth.
 
In order to exchange effectively, a rotor must move the rubber directly into the gap at the back of the corresponding rotor edge. Otherwise, exchange is blocked due to pressure balance. This requires the two rotors to be turned to the proper position for exchange, depending on the speed ratio.
 
When the rotor is rotating, the positive pressure of the rubber on the rotor is p '. According to the force and reaction force, the vertical force produced by the rotor at the protrusion is p. P is divided into circular force (radial force) PR and tangential force Pt. The function of PR is to make the rubber rotate around the rotor axis, and the function of Pt is to make the rubber move axially.
 
Pt =P * TGA
The rubber material moves axially in the rotor protrusion. There must be friction to prevent the rubber from moving axially. Friction t = PTG @, because only when PT is greater than t, the rubber can move axially. That is, a is greater than @, @ = 37 ° - 38 ° so a is greater than 38 °.
 
Therefore, the rubber material moves axially at the short edge of the rotor. Reciprocating cutting of rubber material: at the long edge, because a = 30 ° is less than @, the rubber material will not move axially, but only circularly, which plays the role of material transportation and rolling.
Previous: What are the good ways to open the mixer when mixing rubber?
Next: Introduction to open mill and safety operation rules for cooling line!
Previous: What are the good ways to open the mixer when mixing rubber?
Next: Introduction to open mill and safety operation rules for cooling line!

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