20L Vertical Kneader
20L vertical planetary kneader for dead-corner-free mixing of微量 high-viscosity materials—an efficient lab and pilot-scale kneader solution.
The 20L Vertical Kneader is designed for laboratory R&D, formulation verification, and small-batch pilot production. It is suitable for mixing, dispersing, and kneading silicone sealants, thermal conductive adhesives, lithium battery slurries, adhesives, electronic potting compounds, polymer materials, and paste-like materials. With a vertical planetary stirring structure, the blades rotate on their own axes while orbiting, and wall-scraping devices help the high-viscosity material undergo repeated shear, compression, folding, and stretching inside the 20L tank, improving dispersion uniformity and batch stability. This kneader supports atmospheric or vacuum operation and can be equipped with electric heating or thermal oil heating, explosion-proof motors, PLC control, and hydraulic discharge. It serves as an important scale-up bridge from a 5L lab kneader to a 100L production kneader.
How it Works
During operation, the 20L vertical kneader’s planetary blades orbit around the tank center while rotating at different speeds, creating axial and radial circulation inside the vertical tank. Wall-scraping devices continuously push material adhering to the tank wall back into the mixing zone, preventing wall build-up, agglomeration, and dead corners. Under vacuum, the kneader can simultaneously remove air and volatiles, achieving dense kneading, uniform dispersion, and stable degassing of high-viscosity materials.
Features at a Glance
Planetary Vertical Zero-Dead-Corner Mixing
The combined orbiting and self-rotating motion, together with wall-scraping blades, enables the 20L kneader to achieve full-volume uniform mixing even with high-viscosity materials, reducing wall build-up and agglomeration.
Optional Vacuum Degassing System
Supports vacuum operation and can be equipped with mechanical seals and vacuum valves, helping the kneader remove bubbles during mixing and improving the density of sealants, slurries, and potting compounds.
Multiple Heating and Temperature Control Options
Optional electric heating jacket or thermal oil circulation heating, paired with a temperature controller, provides stable temperature control to meet the kneader’s requirements for heated dispersion, holding reaction, and cooled discharge.
Lab- and Pilot-Friendly Design
The 20L capacity suits small-batch trials. Blades and tank are easy to clean, and the unit can be equipped with PLC/HMI control, variable-frequency speed adjustment, hydraulic discharge, or a bottom discharge valve to improve the repeatability and operating efficiency of the lab kneader.
Technical Specifications
| Effective Volume | 20 L |
|---|---|
| Stirring Type | 立式行星搅拌 / Vertical Planetary |
| Main Motor Power | 3 kW - 5.5 kW |
| Stirring Speed | 变频可调，典型 0-60 rpm / VFD adjustable, typical 0-60 rpm |
| Heating Method | 电加热夹套 / 导热油循环可选 / Electric jacket or thermal oil optional |
| Ultimate Vacuum | ≤ -0.095 MPa（可选）/ ≤ -0.095 MPa (optional) |
| Contact Material | SUS304 / SUS316L 不锈钢 / Stainless Steel |
| Discharge Method | 液压翻缸 / 底部出料阀可选 / Hydraulic tilting or bottom valve optional |
| Control System | 按钮控制 / PLC+HMI 可选 / Button control or PLC+HMI optional |
Frequently Asked Questions
It is suitable for silicone sealants, thermal conductive adhesives, structural adhesives, lithium battery slurries, electronic potting compounds, paste cosmetics, ceramic slurries, rubber compounds, and polymer composites. The final configuration should be confirmed based on viscosity, solid content, temperature, and vacuum requirements.
A 5L unit is better for early formulation screening and very small sample tests, while the 20L vertical kneader is better for formulation scale-up, process verification, and small-batch pilot runs. It more closely resembles the mixing conditions of a production kneader, supporting future scale-up to 100L or larger models.
Yes. It can be customized with an explosion-proof motor, vacuum system, PLC control, thermal oil heating, SUS316L material, special blade types, and discharge methods. Please provide material viscosity, temperature, vacuum requirements, and site power conditions to confirm the final kneader configuration.
A kneader is a mixing machine for high-viscosity materials. Two Z-type (or sigma-type) blades rotate in opposite directions inside the vessel, producing shear, folding and squeezing on the material for uniform kneading. It is widely used for silicone sealant, hot-melt adhesive, butyl rubber and battery slurry.
Vertical kneaders have a vertical vessel with blades entering from above - compact, space-saving, suitable for small-medium batches and frequent changeover. Horizontal kneaders have a horizontal vessel with larger batch capacity, suitable for medium-large production. The choice depends on batch size, workshop space and discharge method.
Kneaders handle pasty materials from 10,000 cP up to several million cP - the range that dispersers and mixers cannot cover. The upper limit depends on blade type, motor configuration and material properties.
The three cover different viscosity ranges. High-speed dispersers handle low-to-medium viscosity slurries below 10,000 cP through high-speed shear; planetary mixers use revolution plus rotation for pastes from tens of thousands to hundreds of thousands cP; kneaders are dedicated to materials above 100,000 cP, including semi-dry compounds, using folding and squeezing action - a common choice for sealants, hot-melt adhesives and battery slurry.
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