Sigma blade mixer

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Overview
The sigma blade mixer is a double-helix (Σ) kneader designed for mixing, kneading and homogenizing high-viscosity, cohesive and elastic‑plastic materials. The mixer combines reciprocal blade motion with a jacket system for external heating or cooling to maintain process temperature.

Main structure

• Mixing chamber (jacketed)
• Agitator: Σ double-helix blades
• Drive motor and gearbox
• Jacket for thermal control (heating/cooling)
• Feed and discharge ports
• Control panel / automation
• Support frame / base

Mixing principle

• Feeding – Raw materials and additives are introduced through the feed port into the mixing chamber.
• Kneading and mixing – The Σ blades rotate relative to each other, folding, stretching and compressing the material to achieve uniform dispersion and homogeneity.
• Jacket temperature control – The chamber jacket enables external heating or cooling (oil, steam, electric jacket, water) to control process temperature.
• End of mixing and discharge – When the target consistency is reached, the product is removed via the selected discharge method (bottom discharge, hydraulic dumping, screw extrusion).

Applications

• Food and bakery compounds
• Rubber and elastomer compounding
• Plastic and polymer processing
• Construction materials (mortars, sealants)
• Chemicals, adhesives, inks, pigments, dyes, batteries, cosmetics, resins

Additional features and options

• Available variants: atmospheric, vacuum or pressurized designs.
• Multiple heating/cooling options: heat transfer oil, steam, electric jacket, water cooling.
• Discharge options: hydraulic dumping, bottom discharge, screw extrusion, etc.
• Customizable automation for control of speed, temperature and mixing time.
• Construction materials: carbon steel or stainless steel options depending on product and sanitary requirements.

Technical specifications

• Type: Sigma blade (Σ) double-helix mixer / kneader
• Main functions: kneading, mixing, dispersing and thermal control of high-viscosity materials
• Key components: mixing chamber, Σ agitator, motor/gearbox, jacket, feed/discharge ports, control system
• Thermal control: jacketed chamber for heating/cooling
• Variants: vacuum/pressure/atmospheric; laboratory to production scales
• Typical industries: chemical, pharmaceutical, food, rubber, plastics, adhesives, construction, cosmetics