Sigma Blade Mixer
A sigma blade mixer (or Z-blade/kneader mixer) is a heavy-duty batch mixer for highly viscous, pasty, or solid-liquid materials, featuring two intermeshing, sigma-shaped (or Z-shaped) blades that rotate in opposite directions at different speeds within a W-shaped trough, creating intense shearing, kneading, and folding action for uniform mixing in a figure-eight pattern. Used across industries like chemicals, food, pharma (for ointments/dough), paints, and adhesives, they handle materials up to very high viscosities and often feature jacketed vessels for temperature control.
Key Features & How They Work Sigma Blade Mixer
- Blades: Two “Z” or sigma-shaped blades that run at different speeds to thoroughly mix materials.
- Mixing Action: The blades pull, shear, compress, and fold the material against the trough walls, ensuring complete homogenization.
- Viscosity: Designed for high-viscosity products (e.g., dough, pastes, putties, rubber compounds).
- Trough: A W-shaped trough accommodates the blades; often jacketed for heating/cooling.
- Discharge: Material is discharged via tilting, a bottom valve, or an extruder screw.
- Applications: Ideal for pharmaceuticals (tablet masses), food (dough), inks, paints, adhesives, sealants, and rubber.
Common Applications by Industry
- Chemicals: Resins, polymers, dyes, pigments, adhesives, sealants.
- Food: Doughs, confectionery, thick pastes.
- Pharmaceuticals: Tablet masses, ointments, stiff pastes.
- Cosmetics: Creams, pastes.
- Rubber & Plastics: Rubber compounds, PVC coatings, putties.