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Double Arm Kneader Mixers

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Double Arm Sigma Kneader Mixers

Double Arm Sigma Kneader Mixers

Double Arm Sigma Kneader Description


All double arm kneader mixers are equipped with two mixing blades placed in a W-shaped horizontal trough. Various blade profiles have evolved, each of which is best suited for a particular type of application. The commonly used blade types are the sigma blade, masticator blade, shredder blade, naben (aka fishtail) blade, and spiral blade. The rotation of the blades is either tangential to each other or the blades may overlap within the trough. The blades rotate toward each other at the same or differential speeds. The blades pass the container walls and each other at close clearances (2-3 mm) resulting in homogenous mixing. The close clearances produce very high shearing action thereby reducing any large particles. These mixers produce a consistent particle size distribution without the need for additional high speed choppers. Homogenous mixing is achieved within 10 to 30 minutes. Mixing homogeneity upto 99% and better can be achieved using the double arm kneader mixers. These mixers and their variants (double arm kneader mixer extruders) are capable of handling material with viscosities as high as 10 million centipoises. The power consumption in double arm kneader mixer is very high compared to other types of mixers and can range from 45 to 75 kW/m3 of mix material. The sigma blade mixer is the most commonly used type of double arm kneader mixer, and is best suited for all round use.


Double Arm Kneader Mixer

  • Two mixing blades placed in a 'w' shaped horizontal trough
  • Commonly used blade types are the sigma blade, masticator blade, spiral blade, shredder and naben blade
  • Rotation of the blades is either tangential to each other or the blades may overlap within the trough.
  • Blades pass the container walls and each other at close clearances generally (1-2 mm)
  • The mixer bowl may be jacketed for circulation of heating or cooling media.
  • Viscosity range  upto 10 million cps
  • Viscous mass of material is pulled, sheared, compressed, kneaded and folded by the action of the blades against the walls of the mixer trough.
  • Fill Up  is 40 – 65 % of bowl volume
  • Mixing homogeneity upto 99 percent
  • Specific power – 45 to 75 kW/ m3
  • Discharge of the material from the mixer
  •  By tilting of the mixer container
  •  Bottom discharge valve
  •  Through an extruder, screw
Related Links
  • Kneader Mixer - Two mixing blades placed in a 'w' shaped horizontal trough..Read more
  • Kneader Mixer Extruder - The Kneader Extruder combines the efficiency of a double arm mixer with the convenience of extrusion screws for improved mixing and discharge of heavy viscous materials…Read more

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