Screw discharge kneader


Screw series kneaders are mainly used for pigments, dyes, and medicines, and there are many ways to discharge them, the most common ones are hydraulic pressure and tank dumping.

Details of Kneader

  • The machine comprises a motor, cover press, main body, mixing chamber and rotor mechanism, gearbox, air control system, tilting machine, heating/cooling system, rubber belt transmission and base, etc.
  • The kneader can be made into vacuum, pressure, atmospheric, Normal temperature, high temperature, low temperature, etc. 
  • The temperature adjustment method of a kneader can be the jacket, halfpipe, far-infrared tile, steam, hot water, heat transfer oil, electric heating, cooling water, chilled water, and other methods. 

Application: Paint, Adhesive, Battery, Pharmaceutical industry, Cosmetic

Kneader is widely used in high-viscosity sealants, silicone rubber, neutral acid glass glue, chewing gum, bubble gum, pulp, and cellulose, also used in batteries, ink, pigment, dye, medicine, resin, plastic, rubber, cosmetics and other industries.


The structure of the kneader

The screw kneader can be made into four types: ordinary type, pressure type, vacuum type, and high-temperature type. According to the material, it can be divided into carbon steel kneader, stainless steel kneader, and special material kneader. According to the place of origin and quality, it can be subdivided into the kneader machine. The temperature adjustment method adopts jacket, steam, heat transfer oil heating, water cooling, and other methods, and adopts hydraulic cylinder turning and covering the opening. The discharge methods include hydraulic pressure, cylinder dumping, ball valve discharge, screw extrusion, hydraulic flap discharge, etc. The cylinder body and the part of the paddle in contact with the material are made of stainless steel, alloy steel, manganese steel, and other materials to ensure product quality.


Working principle of screw discharge kneader

When working, the motor is driven by the reducer to the driving paddle, the driven paddle is driven by the gear, and the propeller of the stirring paddle drives the material to accumulate both in the axial direction and in the radial direction; it is used for high-speed accumulation and low-speed accumulation; It not only performs extrusion movement, but also performs separation movement, so that the materials are fully kneaded, kneaded, blended and mixed evenly, and the physical and chemical reactions of the materials are accelerated.

Stirring paddle for screw kneader

1. The fishtail-type impeller is suitable for the kneading operation of cellulose materials.
2. The Z-type stirring paddle is also called the simple stirring paddle. It has a simple shape and is used to disperse and mix the pigment in the resin under the condition of high viscosity.
3. The cutting type stirring paddle is the toughest stirring paddle, which is suitable for the kneading operation of ultra-high viscosity materials under the condition of high power and heavy load. When cutting-type stirring paddles are used, most of them adopt a tangential arrangement of two paddles. Applicable materials: rubber, iron oxide, magnetic recording materials, etc.
4. The Σ-type stirring paddle is the most general type. It is suitable for the kneading operation of external substances that must have a large movement in the kneading and tank. It is mainly used for the arrangement of the two paddles overlapping, especially for the extrusion dehydration operation. In some cases, Z is suitable for using Σ-type stirring paddles.

kneader & Z Blade Mixer​

How to Improve the Efficiency of Screw Kneader

1. The characteristics of the material (particle size, adhesion, shape, density, fluidity, water content, surface roughness, agglomeration tendency, etc.)
a. When the particles with uniform size are kneaded, the dense one tends to the bottom of the device.
b. When the density is similar, the bottom of the tendon is small and nearly spherical.
c. The higher the viscosity and the higher the temperature, the easier it is to agglomerate or agglomerate, and it is not easy to disperse evenly.
2. The discharge method of the kneading equipment:
a. Hydraulic turning cylinder discharge
b. Bottom discharge ball valve
c. Screw extrusion material
3. The inner surface roughness of the kneader (mirror polishing, fine polishing, rough polishing)
4. The amount of material in the container:
a. Too much, less kneading space;
b. Too little, low productivity, generally 30% – 50% is appropriate.
5. The speed of the paddle of the kneader: the speed of the paddle is different for the kneader of different specifications.

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Guidelines For Kneader

The dispersion kneader is suited for rubber and plastic mastication, as well as the blending of different rubber and plastic components. Small and medium-sized rubber and plastics manufacturers with a wide range of product types and colours, as well as food, dyes, pharmaceuticals, and ceramics, can benefit from the internal mixer. 

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Guidelines For Kneader

Sigma Mixer: Indispensable Equipment For Manufacturing

Sigma Mixer is a type of mixer that uses a unique mixing principle to achieve an efficient blending of materials. The mixer consists of two blades that rotate in opposite directions, creating a kneading and folding action that ensures thorough mixing. The blades are shaped like the Greek letter Sigma, hence the name Sigma Mixer.

sigma mixer machine
Guidelines For Kneader

Sigma Blade Mixer: The Mixing Solution

The Sigma Blade Mixer is a robust and reliable mixing machine that uses a unique mixing principle to achieve superior results. It is a type of double-arm kneading mixer that features two blades that rotate in opposite directions.

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Vacuum Kneader: A Machine for Your Mixing Needs

The Vacuum Kneader is a type of mixer that utilizes a vacuum chamber to create a homogeneous mix of ingredients. It is designed to knead, mix, and disperse high-viscosity materials under vacuum conditions, resulting in a superior product.

mixer kneader
Guidelines For Kneader

Efficiency and Effectiveness of Dispersion Kneader

The dispersion kneader has complete control over the mixing and blending of the raw materials to create an even mix that allows for better distribution. This device contains a mixing chamber with rotating blades made of high-quality steel.

mixer kneader
Guidelines For Kneader

Vacuum kneader: high efficiency and environmental protection

A vacuum kneader is mainly used for stirring, mixing, and kneading high-viscosity and elastic-plastic materials. The most common fields include high-viscosity sealant, silicone rubber, neutral acid glass glue, chewing gum, bubble gum, aluminum silver paste, silica gel, paper pulp, cellulose, and other materials. It covers food, agrochemical, pharmaceutical, cosmetics, electronic paste, and other industries, and has been sought after by the industry.

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