Ultra light clay sigma mixer

The sigma mixer is an ideal equipment for mixing, kneading, vulcanizing and polymerizing high viscosity materials. Sigma mixer can be used to produce silicone rubber, sealant, hot melt adhesive, food gum base, bubble gum ,chewing gum and so on. The sigma blade mixer is a special mixing and kneading device. The most commonly used is the use of two Z blades, which are arranged side by side in parallel, that is, the speed of a stirring blade is fast and the speed of a stirring blade is slow to produce a shear Cutting force, different paddle speed makes the mixing of materials can be quickly cut, so that the material can be mixed evenly.

Kneading machines are used in processes such as mixing, kneading, crushing, stirring, and re polymerization of high viscosity and high elastoplastic materials. Kneading machines are mainly used for producing silicone sealants, silicone structural adhesives, neutral glass adhesives, neutral anti mold adhesives, neutral weather resistant adhesives, vulcanized silicone rubber, silicone rubber, silicone resin, butyl rubber, mixed rubber, masterbatch, plastics, PP, PVC, PE, BMC, CMC cellulose, battery pastes, inks, pigments, dyes, bubble gum, chewing gum, medical silicone, etc.

1 Overview

The differential kneading machine can not only meet the needs of general separation engineering, but also solve the problem of viscous and boring mixing and homogenization. Its mechanism embodies multiple functions such as crushing, stirring, kneading, self-cleaning, and conveying, and can be used for continuous production operations.

2. Mechanism of differential kneading machine

Differential kneading machine evolved from the principle of twin-screw mixer. The twin-screw machine is composed of a pair of constant speed meshing screws, which have good mixing and forced feeding effects, and can operate continuously. It is widely used in the rubber and food industry. Its disadvantage is that the material must be refilled into an effective volume before it can be pushed forward. If used to handle materials that are prone to clumping, the shaft power will increase exponentially, making it easy to block. If gas-phase substances are produced, it is not conducive to the separation of solids and peculiar substances. Differential kneading machines overcome the above disadvantages.

The principle of differential kneading machine is mainly reflected in the differential speed. From the perspective of transmission theory, a relatively matched transmission pair, such as a pair of helical gears and a pair of screws, can meet the basic requirements of kneading by having the same helix angle, equal linear velocity, and varying angular velocities when the number of teeth and outer diameter are different. But the line speed at the moment of kneading is equal. The matching of the differential kneading machine is a pair of outer circles, different helix angles, and unequal linear velocities, which rotate in pairs. Its motion principle is solved by phase slip, so it becomes kneading rather than meshing. And the mechanism of the mixer requires kneading rather than meshing.

Firstly, a dynamic differential kneading mathematical model was established on the computer. There is a multiple phase slip between the two screws, and there is also a multiple difference in the linear velocity of the tooth tip. At each moment, a cross-sectional tooth profile is formed during relative kneading, so the shaft power effectively acts on the material in the remaining space. If we consider multifunctionality, we can make further changes to the paired screws, such as hollowing out the spiral within the gear contour, cutting the continuous spiral into intermittent ones, and adding a cut on the broken opponent's spiral. The principle of these variations is not to affect the kneading operation of the pairing, or to avoid fighting. Of course, we can make more variations to this principle and add more functions.

【Application Industry】：
Widely used in mixing and kneading of low-to-high viscosity products in many industries such as ceramics, silicone rubber, sealants, clay, chewing gum, candy, bakery food, pharmaceuticals, carbon paste, inks/pigments ,etc.