Sigma Kneader Plastic Dispersion Mixer

Description

A Sigma Kneader Plastic Dispersion Mixer, also referred to as a Sigma Mixer, Z-Blade Mixer, or Double-Arm Kneader, is a strong, heavy-duty industrial batch mixer designed for thorough kneading, mixing, grinding, and dispersion of high-viscosity, sticky, and semi-solid materials.

This durable sigma blade mixer is built to handle tough, dough-like substances that need strong shear forces to achieve a uniform mix. It is suitable for a variety of materials, including plastics, rubber, adhesives, sealants, composites, and other viscous substances, delivering consistent, high-quality blending results with excellent dispersion and uniformity.

This mixer is especially suited for industries dealing with difficult-to-process high-viscosity formulations. It ensures efficient mixing, reduces processing time, and enhances product quality. Its key features include sturdy construction, strong torque, and effective kneading action, making it the go-to equipment for plastic dispersion, masterbatch production, and specialty chemical manufacturing.

Salient Features of Sigma Kneader Plastic Dispersion Mixer

Fabricated using structural carbon steel (mild steel) or premium stainless steel configurations including SS 304 and SS 316.
Stainless components can be finished with a soft brushed satin matte texture or a high-gloss reflective mirror polish based on buyer preferences.
Mild steel structures are treated with an initial rust-inhibiting red oxide primer base followed by a dual-coat protective epoxy finish.
Optional heating or cooling jackets can be integrated to maintain precise process temperatures.
Encased in high-density mineral wool insulation and protected by an outer metallic cladding sheet.

Built with precision-engineered tangential 'Z'-shaped paddles to achieve uniform, thorough batch blending.
Emptying can be configured with either a manual hand-crank wheel mechanism or an automated hydraulic actuation setup.
Features food-safe PTFE shaft seals to ensure strict compliance with hygiene and safety standards.
Designed with micro-tolerances between the inner trough shell and the rotating blades to completely eliminate product accumulation or dead zones.
Vacuum-sealed operational chambers and liquid spray injection kits available upon request.

Working Principle of Sigma Kneader Plastic Dispersion Mixer

Agitator Kinematics & Axial Shifting: Twin counter-rotating ‘Z’-profile (Sigma) mixing elements turn at precise differential velocities to generate a tangential wiping action, continuously conveying and redistributing the batch across the vessel length.

Batch Extraction Alternatives: Finished product can be unloaded by pivoting the mixing trough, releasing bottom-mounted drain valves, or driving the mass through a parallel side extrusion screw.

Rheological Breakdown & Homogenization: The blending process integrates bulk translation, stretching, folding, splitting, and re-mixing. Simultaneously, intense frictional shear and tearing forces generated between the rotating paddles and interior walls effectively break down solid particle aggregates.

Automated Thermal Transition Sequence: Once the preset batch sterilization duration finishes, the heating circuit automatically cuts off, the pneumatic exhaust flap opens, and the cooling sequence initiates.

Tangential Design Architecture: In this layout, the agitators spin inside the trough while meeting tangentially—typically with the front blade operating at a faster 3:2 speed ratio relative to the rear. This high-torque arrangement is optimized for dense, heavy media such as adhesives, rubber polymers, pigment pastes, and dyes.

Overlapping Design Architecture: The agitators intersect directly above the central divider, requiring strict synchronization so both spin at identical speeds. This accelerates cross-transfer between compartments, making it ideal for fluid or creeping substances like cosmetic creams, pharmaceutical ointments, clay coatings, and carbon pastes while exerting lower shear and kneading forces.

Technical Specification of Sigma Kneader Plastic Dispersion Mixer

Model	Capacity – Liters		Motor (H.P.)
Model	Working Capacity approx.	Gross Capacity approx.	General	Heavy Duty
ASM – 50	50 Liters	80 Liters	5 H.P.	7.5 H.P.
ASM – 75	75 Liters	110 Liters	7.5 H.P.	10 H.P.
ASM – 100	100 Liters	150 Liters	10 H.P.	15 H.P.
ASM – 150	150 Liters	200 Liters	15 H.P.	20 H.P.
ASM – 200	200 Liters	300 Liters	20 H.P.	25 H.P.
ASM – 400	400 Liters	550 Liters	30 H.P.	40 H.P.
ASM – 500	500 Liters	750 Liters	40 H.P.	50 H.P.
ASM – 750	750 Liters	1150 Liters	50 H.P.	60 H.P.
ASM – 1000	1000 Liters	1500 Liters	60 H.P.	70 H.P.
ASM – 1500	1500 Liters	2100 Liters	75 H.P.	80 H.P.
ASM – 2000	2000 Liters	2600 Liters	80 H.P.	90 H.P.
ASM – 3000	3000 Liters	3800 Liters	100 H.P.	120 H.P.

* Power voltage can be adjusted as per customer’s domestic power voltage requirements.
* Rights of technical improvements & modification reserved.
* Illustrations & dimensions are shown for information purpose only.

Types of Sigma Mixer

Sigma Mixer Machine

Sigma Mixer Extruder

Lab Sigma Mixer

Food Grade Sigma Mixer

Heavy Duty Sigma Mixer Machine

Z Type Sigma Mixer

Applications of Sigma Mixer

Pharmaceutical Industry
Nutraceutical Industry
Herbal Industry
Ayurvedic Industry
Biotech Industry
Cosmetic Industry
Chemical Industry

Optional Features/Accessories of Sigma Kneader Plastic Dispersion Mixer

Liquid Spray System

Vacuum System

Screw System

Blades Cooling Arrangement

Automatic Valve Discharge System

Key Features of Sigma Kneader Plastic Dispersion Mixer

Mixing Mechanism: It features two counter-rotating Z-shaped (sigma-shaped) blades in a U-shaped trough. The blades rotate at different speeds, creating a tangential folding and shearing action that transfers material from one blade to the other for excellent dispersion and homogeneity.

Construction: The trough and blades are typically made of mild steel or stainless steel (304/316 grades) for durability and corrosion resistance. It often includes jacketed designs for heating/cooling.

Discharge Options: Material is discharged by tilting the trough, bottom valves, or an extrusion screw (in advanced models).

Capacity: Ranges from lab-scale to large industrial models.

Viscosity Handling: Ideal for materials exceeding 1 million cP (centipoise), including very thick pastes and compounds.

FAQ for Sigma Kneader Plastic Dispersion Mixer

What is a Sigma Kneader Plastic Dispersion Mixer and what other names is it known by?

It is a heavy-duty industrial batch mixer designed for thorough kneading, mixing, grinding, and dispersion of high-viscosity, sticky, and semi-solid materials. It is also commonly called a Sigma Mixer, Z-Blade Mixer, or Double-Arm Kneader.

Which materials of construction are available and how are the finishes handled?

The mixer is available in Stainless Steel 316, Stainless Steel 304, and Mild Steel. Stainless steel surfaces can be polished to a matt or mirror finish as per customer requirements, while mild steel versions receive one coat of red oxide and two coats of epoxy paint.

How does the working principle of the sigma blades achieve uniform mixing?

Tangential ‘Z’-shaped (sigma) kneading blades rotate accurately at different speeds toward each other, transferring product from one end to the other. The action combines bulk movement, stretching, folding, dividing, and recombining, while shearing and tearing against the blades and side walls reduce solid particle size.

What is the typical speed ratio of the blades in the tangential design?

In the tangential design, the front blade generally rotates faster than the rear blade, usually in a ratio of 3:2. This design is preferred for higher-viscosity materials such as adhesives, rubber compounds, flush colors, dyes, and pigments.

What capacity range and corresponding motor options does the machine offer?

Models range from ASM-50 (approx. 50 L working / 80 L gross capacity with 5 HP general or 7.5 HP heavy-duty motors) up to ASM-3000 (approx. 3000 L working / 3800 L gross capacity with 100 HP general or 120 HP heavy-duty motors). Power voltage can be adjusted to suit local requirements.

What discharge options are provided for handling thick, sticky products?

Discharge can be achieved by hand-wheel operated (manual) or hydraulic operated (automatic) systems, by tilting the container, through bottom valves, or by means of an extrusion screw beside the container.

Can the mixer be equipped for temperature control during processing?

Yes. A jacket for heating or cooling applications can be fitted, complete with mineral wool insulation and cladding. Optional blade cooling arrangements are also available for temperature-sensitive formulations.

What sealing and design features support hygienic or food-grade use?

PTFE shaft sealing is provided for food-grade compatibility. A minimum gap between the trough inner shell and the blades helps prevent product sticking, supporting clean operation.

Which industries and types of products is this mixer commonly used for?

It is widely used in the pharmaceutical, nutraceutical, herbal, Ayurvedic, biotech, cosmetic, and chemical industries for high-viscosity pastes, plastics, rubber, adhesives, sealants, composites, dyes, pigments, creams, ointments, and similar materials.

What optional features and accessories can be added to the standard machine?

Available options include a liquid spray system, vacuum system (for degassing), screw system for continuous discharge, blades cooling arrangement, and automatic valve discharge system. These enhance process control and handling of extremely thick materials.

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Sigma Kneader Plastic Dispersion Mixer

Description

Salient Features of Sigma Kneader Plastic Dispersion Mixer

Working Principle of Sigma Kneader Plastic Dispersion Mixer

Technical Specification of Sigma Kneader Plastic Dispersion Mixer

Types of Sigma Mixer

Applications of Sigma Mixer

Optional Features/Accessories of Sigma Kneader Plastic Dispersion Mixer

Liquid Spray System

Vacuum System

Screw System

Blades Cooling Arrangement

Automatic Valve Discharge System

Key Features of Sigma Kneader Plastic Dispersion Mixer

FAQ for Sigma Kneader Plastic Dispersion Mixer

Countries We Export to

Partner with Industry Experts

Countries We Export to

Partner with Industry Experts

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