Low-shear conveying screw element with enhanced distributive mixing performance
Improved distributive mixing
Lower shear stress
Uniform melt distribution
Stable processing conditions
Triple-flighted screw elements are designed to increase the number of flow channels, thereby enhancing material redistribution and homogenization.
While their conveying capacity is lower than that of single or double-flighted screw elements, they excel in applications requiring gentle mixing and uniform melt distribution.
Multiple channels promote frequent material splitting and recombination.
Suitable for heat-sensitive or shear-sensitive materials.
Improves consistency in downstream processing.
Increases interfacial contact between material layers.
Limits conveying force but improves mixing uniformity.
Helps maintain stable processing conditions in sensitive applications.
| Diameter | Ø18–Ø400 |
| Do/Di Ratio | 1.55～1.8 |
| Length | 0.5～2.5D |
| Pitch | Customized |
| Material | N00/D2/D11/W6/H9/H10/H26/Hastelloy/Stainless |
| Surface Hardness | HRC 58–64 |
| Max. Operating Temp | ≤450°C |
| Wear Resistance | Standard/High/Ultra-high |
| Corrosion Resistance | Standard/High/Ultra-high |
| Application | Masterbatch/Compounding/Recycling /Film/Feed/Food/Pharmacy |
| Suitable for | Twin Screw Extruder |
A: When distributive mixing is needed without increasing shear.
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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
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
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
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
SSK conveying elements combine the strong conveying ability of single flight elements with increased free volume.
Best suited for:
Difficult-to-feed materials
Low-density powders and fillers
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
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