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.

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


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