What is a Sigma Mixers?

Longjun Sigma mixers,Also known as a Z type blade mixer or kneader mixer: Core Equipment for Mixing High Viscosity Materials

As a professional manufacturer of mixing equipment in China, Longjun Machinery produces the Sigma kneading machine (also known as the double Z-blade mixer), specifically designed for high-viscosity materials with viscosities exceeding 500,000 cps. With its efficient mixing performance and flexible configuration, it is widely used in various industries such as chemical, food, rubber and plastics, and new energy.

1. Core working principle

The equipment adopts a unique Z-shaped dual-blade differential design, with the blades rotating in opposite directions within a W-shaped cylinder. Through the quadruple actions of compression, stretching, folding, and shearing, the material forms a composite flow in both axial and radial directions, achieving deep and uniform mixing. Compared to ordinary mixing equipment, its mixing efficiency is improved by more than 30%, making it particularly suitable for materials such as silicone rubber and sealant, which have extremely high requirements for dispersion.

II. Four major machine types cater to diverse needs

Standard Model: Basic equipment equipped with standard Z-shaped blades and an electric heating system, suitable for preliminary mixing of silicone rubber and sealant. It offers outstanding cost-effectiveness, with a starting price of 8,800 yuan per unit. Discounts are available for bulk purchases.

Vacuum type: Integrated -0.99barG high vacuum system, which can effectively remove bubbles and volatile components from materials, is a necessary equipment for the production of bubble-free finished products such as silicone rubber and neutral glass adhesive. It supports hydraulic cylinder turning for material discharge, making operation convenient.

High-temperature type: Utilizing electric heating or heat-conducting oil temperature control technology, the working temperature can reach up to 400℃. It is specifically designed for high-temperature resistant materials such as APP flame retardants and high-temperature sealants, ensuring stable mixing of materials under high-temperature conditions.

Laboratory type: With a capacity ranging from 5L to 50L, it features a compact structure, equipped with a small screw discharge system and vacuum function. It is suitable for universities and research institutions to conduct small-batch formula development, meeting precise experimental needs.

III. Core Structure and Configuration

Mixing system: It utilizes SUS304/316L stainless steel blades, with surfaces polished for corrosion resistance and ease of cleaning. The differential drive design (fast blade 48.26RPM/slow blade 28RPM) enhances the shear mixing effect.

Temperature control system: The cylinder body adopts a jacketed structure, supporting steam, heat transfer oil, or water circulation for heating/cooling, with a temperature control accuracy of ±1℃, meeting the temperature process requirements of different materials.

Discharging method: Three options are provided: hydraulic cylinder turnover, screw extrusion, and ball valve discharge, accommodating diverse discharging needs ranging from viscous paste to granular materials.

Material assurance: All parts that come into contact with materials are made of food-grade or industrial-grade stainless steel, meeting GMP hygiene standards and corrosion resistance requirements.

IV. Typical application scenarios

Chemical industry: mixing and defoaming of silicone rubber, sealant, ink, and dye to ensure product uniformity and stability.

Food and Pharmaceuticals: Sterile mixing of chewing gum base, paste-like seasonings, and medicinal ointments, meeting the stringent standards for food and pharmaceutical production.

New energy field: Premixing and degassing of lithium battery slurry and conductive adhesive to avoid micropore defects and enhance battery performance.

Special materials: High-temperature mixing of carbon materials and flame retardants facilitates the large-scale production of high-end materials.

V. Purchase and Maintenance Guide

Capacity selection: For industrial production, we recommend models ranging from 100L to 5000L. For laboratory research and development, small equipment from 5L to 50L is an option. Longjun supports customization for non-standard capacities.

Functional configuration: Select additional functions such as vacuum and high temperature according to the characteristics of the material. For example, a vacuum system must be equipped for producing glass glue, and a high-temperature model should be selected for processing high-temperature materials.

Routine maintenance: Regularly lubricate the transmission components and inspect the sealing system to prevent material leakage; conduct a pressure test on the heating jacket every six months to ensure safe operation of the equipment.

The Longjun Sigma kneading machine, with its stable performance, flexible configuration, and attentive after-sales service, has become a reliable choice in the field of high-viscosity material mixing. It has currently provided customized solutions for thousands of domestic enterprises.