Newest Silicone Rubber Sigma Mixer

A Newest Silicone Rubber Sigma Mixer (also known as a Z-blade mixer, double-arm kneader, or sigma blade kneader) is specialized industrial equipment designed for mixing, kneading, crushing, dispersing, and polymerizing high-viscosity elastic-plastic materials like silicone rubber, sealants, hot-melt adhesives, chewing gum bases, and more.

It features two counter-rotating Z-shaped (sigma) blades in a U-shaped trough, providing strong shearing action for uniform mixing without dead zones. Modern models often include vacuum systems to remove bubbles, hydraulic tilting or screw extrusion for discharge, jacketed heating/cooling, and inverter-controlled speeds for precision.

Newest Silicone Rubber Sigma Mixer Video

Salient Features of Sigma Mixer Machine

• Available in Stainless Steel 316, Stainless Steel 304 and Mild Steel materials.

• Stainless Steel polish to matt & mirror finish as per customer’s requirements.

• Mild Steel finish with one coat of red oxide and two coats of epoxy paint.

• Discharge option of hand wheel operated (manual) or hydraulic operated (automatic) offered.

• Jacket for heating or cooling application can be offered.

• Mineral wool insulation with cladding on jacket.

• Tangential designed ‘Z’ blades offered for uniform mixing.

• PTFE made shaft sealing provided for food grade compatibility.

• Minimum gap between trough inner shell & blades removes possibility of sticking product.

• On demand Spray system, vacuum system

Optional Features/Accessories of Sigma Mixer

• Liquid Spray System

• Vacuum System

• Blades Cooling Arrangement

• Screw System

• Automatic Valve Discharge System

Process Operation of Silicone Rubber Sigma Mixer

In Sigma mixer tangential action of mixing and kneading obtained by ‘Z’ type (SIGMA) shaped kneading blades, which rotates very accurately at different speed towards each other causing product to be transferred from one end to another end. Discharge of the finished product is achieved by tilting the container or through the valves at the bottom or by means of an extrusion screw beside the container.

The mixing action is a combination of bulk movement, stretching, folding, dividing, and recombining of the material. The shearing & tearing action of the material against blades and the side walls causes size reduction of the solids. After the time period required for sterilizing the batch has elapsed, the heating circuit shuts of the pneumatics damper (exhaust) opens and cooling operation commences.

In the tangential design, the blades rotate in the trough meeting tangentially. The front blade generally rotates faster than the rear blade usually in the ratio of 3:2. Tangential blades are generally used for material of higher viscosities such as adhesives, rubber compounds, flush colors, dyes, and pigments.

In the overlapping design, the blades overlap above the saddle of the container. Due to the overlapping action, it is necessary that the relative position of the two blades is unchanged, and as a result, both the blades rotate at the same speed. Materials that flow freely or creep down into the blades are mixed using the overlapping blade action. This design offers a faster interchange of material from one blade compartment of the mixer to the other. Overlapping blade action is used for materials of lighter viscosities such as carbon pastes, clay coating, creams, and ointments. The overlapping blade produces a lower kneading and shearing compared to the tangential blade action.

Technical Specification of Sigma Mixer Kneader

* 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.