Sigma Mixer

S.S. Engineering offers a robust and durable Sigma Mixer, also known as a Double Arm Mixer Cum Kneader, designed for intensive operations such as mixing, kneading, grinding, dispersion, and drying of high-viscosity materials. Engineered for long-term, trouble-free operation, it is widely used in various process industries.

Design & Construction:

• The Sigma Mixer features two counter-rotating blades housed in a rectangular trough with a curved bottom (twin half-cylinders) and a central saddle section.
• Blades are driven by a geared motor mounted at one end.
• The mixing container is available in Mild Steel, SS 304, or SS 316, depending on application needs.
• A jacketed structure (in Carbon Steel) is provided for heating or cooling operations.
• Fitted with either a dust-tight cover for standard operation or a vacuum-sealed lid for vacuum processing (optional).

Applications:

Ideal for viscous to highly viscous materials in industries such as:

• Pharmaceuticals 
• Adhesives & Sealants
• Food & Confectionery 
• Rubber & Plastics
• Paints & Pigments
• Chemicals & Resins

SIGMA MIXER - TECHNICAL SPECIFICATIONS

BLADE DESIGN

The mixing elements are Sigma-type, precision-cast in steel and machined for high accuracy. Two blades contra-rotate inwardly with minimal clearance (12 mm) against the container walls to ensure thorough and uniform mixing.

A Gland Pusher with Gun Metal Bush is provided for each shaft to minimize friction and enhance the service life of the mixer blades.

DRIVE SYSTEM

• Motor Type: TEFC or TEFC Flameproof
• Speed: 1440 RPM
• Transmission: Heavy-duty reduction gearbox (Reputed Make) + Spur Gears with machine-cut teeth
• Lubrication: Grease-lubricated drive assembly with protective guard

DISCHARGE OPTIONS

• Bottom Discharge: For applications where 100% discharge or thorough cleaning is not critical
• Tilting Discharge: for complete discharge and easy cleaning

STANDARD FEATURES

• Manual or motorized discharge for capacities up to 150 Ltrs
• Hydraulic tilting discharge mechanism standard for larger capacities
• Heavy-duty Steel Fabricated Stand for vibration resistance and quiet operation

MIXING ACTION

• The sigma mixer achieves superior mixing through:
• Bulk movement, smearing, folding, stretching, and dividing
• End-to-end circulation via pitched, tangential blades rotating at different speeds
• Enhanced heat transfers due to increased wiped area
• Suitable for solid, liquid, or combined input materials

 OPTIONAL - PULL ACTION CLAMPS 

• Pull-action clamps using a toggle-lever mechanism allow quick and secure lid fastening. U-bolts offer length adjustment for a firm latch connection.