High-efficiency feeding screw element combining strong conveying and increased free volume
Strong conveying force
Increased free volume
Ideal for difficult-to-feed materials
SSK conveying screw elements combine the high conveying capacity of single-flight elements with the increased free volume of SK designs, making them highly effective for challenging feeding conditions.
They are particularly suitable for low-density or irregular materials that require both strong intake and stable transport.
Ensures stable material transport.
Improves feeding capacity for bulky materials.
Reduces fluctuations in material supply.
Combines single flight conveying with enlarged channel volume.
Achieves both feeding efficiency and transport stability.
Particularly effective in low-density systems.
| Structure | Hybrid single-flighted + high free volume |
| Application | Feeding optimization |
| Materials | Customized |
A: SSK provides stronger conveying while maintaining high free volume.
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Double flight conveying elements are the most widely used design in twin screw compounding. They provide the best balance between free volume and torque transmission.
Best suited for:
Feeding sections
Venting zones
Pressure control sections
Transition elements are designed to connect different screw element geometries while minimizing dead zones and material retention.
Best suited for:
Transition between single and double flight elements
Connection between SK and standard conveying elements
Geometry change zones within complex screw configurations
Stretching elements, also called S-type elements, improve material exchange and distributive mixing in partially melted zones.
Best suited for:
Semi-plasticized material zones
Improved dispersion
Gentle mixing processes
Single flight conveying elements provide higher conveying efficiency than standard double flight elements. Their wider flight design reduces leakage flow and increases pressure-building capability.
Best suited for:
Feeding sections
Extrusion zones
Applications requiring strong conveying force
SK conveying elements provide approximately 15% higher free volume than standard conveying elements and are particularly suitable for low bulk density materials.
Best suited for:
Feeding zones
Side feeding
Low bulk density materials
Triple flight elements provide strong distributive mixing with lower shear. They are commonly used in melt mixing sections where gentle material distribution is required.
Best suited for:
Melt distribution
Sensitive materials
Low-shear compounding
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