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.

The Kneader Extruder includes a set of contra-rotating kneading blades and one or more extrusion screws. The blades are mounted on a horizontal axis in a W-shaped trough. Below the blades in a separate cavity are the extrusion screws. During the mixing cycle the blades rotate towards each other while the mixing screws rotate in a reverse direction, constantly feeding new materials into the mixing blades. After the mixing/kneading cycle is complete, the screws are reversed and they extrude and transport the mixed materials out of the mix zone.

Standard Features

  • Available in all grades of Carbon Steel and Stainless Steel.
  • Optional wear resistant liner plates provided for abrasive products.
  • Designed for atmospheric operation.
  • Stainless steel surfaces are polished to desired standards. All exterior non-stainless surfaces are painted with enamel paint.
  • Squirrel Cage, Three Phase Induction Motors suitable for 415 Volts, 50 Hz.
  • Worm reduction gearbox, helical reduction gearbox.
  • Single Speed Drive.
  • Available in working capacities of 5 Liters to 2500 Liters. Other sizes manufactured on request.
Customised Features

  • Good Manufacturing Practice (GMP) models.
  • Explosion-proof motors, Variable Speed Drives along with Electrical Control Panel.
  • CE
  • Jacketed construction available for heating and cooling applications.
  • Different shape blades available to suit specific applications.
  • Can be offered for vacuum application


  • Ideal for mixing, kneading of highly viscous mass, sticky and dough like products.
  • Mixing of pastes, rubber, and heavy plastic masses.
  • Applications in Food, Rubber, Pharmaceutical and Chemical industries.
  • Dry powder to wet phase mixing.

Advantages over conventional tilting bottom discharge kneaders

  • Low mixing time.
  • Elimination of the manual scraping of sticky/tacky materials.
  • Eliminates operator exposure to materials at elevated temperatures or those of a toxic nature, thereby improving plant safety.

Sample Applications Of Sigma Mixer Extruder

  • Adhesives
  • Biscuits doughs
  • rubber
  • Carbon pastes
  • Ceramics
  • Chemicals
  • Crayon and pencil lead
  • Inks and pigment products
  • Explosives
  • Fiberglass resin doughs
  • Food and confectionery products
  • Gaskets and gland packings
  • Grinding wheel preparations
  • Hot-melts
  • Marzipan
  • Putties
  • Mastics
  • Metal powders
  • preparations
  • Pencil erasers
  • Pharmaceuticals
  • Plastics
  • Refractories
  • Sealing compounds
  • Silicone rubber
  • Soaps and detergents
  • Solid propellants
  • Sugar pastes
  • Viscous rubber solutions
  • Chewing gum


Other Mixers

Single Planetary Mixer
The Single Planetary Mixer includes a bowl with a blade that has a planetary motion…Read more
Double Planetary Mixer
The Double Planetary Mixer includes two blades that rotate on their won axes…Read more

Kneader Mixer
The two mixing blades rotate towards each other at differential speeds…Read more


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