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Co-Kneader
LOW SHEAR, LOW PRESSURE, LOW TEMPERATURE BUT HIGH KNEADING EFFICIENCY FOR YOUR COMPOUNDING NEEDS
The Co-Kneader, a low-shear rotating and reciprocating single-screw extruder is designed for shear and temperature sensitive compounds.
The flights on the screw are interrupted and interact with three rows of stationary kneading pins located in the barrel wall. The interaction between the moving flights and the stationary pins provides dispersive and distributive mixing simultaneously.
The reciprocating single-screw intensive extruder has the characteristics of uniform shearing, high dispersion, high filling, stretching melt, etc., and combines the advantages of single and twin-screw extruders. The unique working principle, coupled with a complete set of threaded components and supporting equipment, makes it more widely used. On one machine, mixing, mixing, plasticizing, dispersing, shearing, stretching, degassing and granulation can be achieved. The interfacial area that allows the melt to flow in the machine is much larger than general shear flow.
Unique Working Principle
During this process, the material is not only sheared between the pins and kneading flights, but also inverted. This working process is totally different from traditionally single or twin-screw extruders. It improves the effectiveness of kneading by moving transversely and lengthways. As such, it can provide high-quality dispersive and distributive mixing. In addition, by using suitable breechblock, the pressure remains relatively steady.
With circular water-cooling system both inside the barrels and screw, the processing temperature is controlled accurately and much lower than the other machines because the materials are processed while they are intenerated, not completely melted. Accordingly, there will be less material disassembled and the quality of the final products will be the best.
| Model | SJW-45(M) | SJW-70(M) | SJW-100(M) | SJW-140(M) | SJW-200 |
|---|---|---|---|---|---|
| Screw Diameter (MM) | 45 | 70 | 100 | 140 | 200 |
| L/D | 15-25 | 15-25 | 15-25 | 15-25 | 20-25 |
| Main Motor Power (KW) | 15-30 | 55-75 | 90-132 | 160-220 | 250-280 |
| Max Screw Speed (RPM) | 500 | 500 | 500 | 500 | 500 |
| Reference Output: KG/HOUR | 10-50 | 100-200 | 150-300 | 600-1000 | 1000-2000 |
| Model | SKW-105 | SKW-125 | SKW-140 | WKS-120 |
|---|---|---|---|---|
| Screw Dia (MM) | 105 | 125 | 140 | 120 |
| L/D | 15-22 | 15-22 | 15-22 | 9-15 |
| Main Motor Power(KW) | 200-280 | 350-450 | 550-650 | 250-280 |
| Max Screw Speed(RPM) | 500 | 500 | 500 | 500 |
| Second-stage Screw dia (MM) | 180 | 220 | 280 | 220 |
| Second-stage L/D | 7 | 7 | 7 | 7-8 |
| Second-stage Power(KW) | 75 | 110 | 132 | 90-132 |
| Reference Output:kg/h | 500-800 | 800-1500 | 1600-2000 | 1800-2500 |
Features and Benefits
- Design Flexibility: The unique reciprocating single screw and multi-tooth barrel design offer the advantages of both single and twin screw extruders, making it highly adaptable for processing, modifying, and granulating various plastics.
- Short Material Residence Time:With the shortest aspect ratio, materials have a short and controllable residence time, reducing thermal degradation and ensuring high dispersibility with low energy consumption and minimal use of pigments and additives.
- Effective Mixing:The system’s reciprocating motion allows for complete mixing, plasticizing, dispersing, homogenizing, and degassing in a single production cycle.
- Efficient Degassing:The vacuum device effectively removes moisture and volatile gases, making it ideal for processing semiconductors, conductive materials, and cable materials.
- Precise Temperature Control:Accurate and stable temperature control with minimal temperature difference is ideal for processing heat-sensitive and shear-sensitive materials.
- Easy Maintenance:The split barrel and segmented screw design facilitate quick and safe disassembly, cleaning, and repair, while low internal friction ensures stable, low-noise operation.
- Cost-Effective Operation:Equipped with semi-automatic and automatic screen-changing devices, the system reduces labor intensity, raw material consumption, and production costs.
