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Transition elements are dedicated screw pieces that smoothly bridge different lobe geometries (e.g., from double-lobe to triple-lobe and back). Through axially tapered design of lead and channel volume, they eliminate flow path mutations and retention dead spots at the joints of different functional elements, and realize smooth transition of material conveying capacity, shear intensity and fill degree. They are key connecting components to ensure flow path continuity of screw configuration and improve process stability.
Axial Tapered Lead Structure
Based on forward conveying screws, the lead changes continuously along the axial direction (transitionable from large lead to small lead, or vice versa) with no abrupt lead steps, ensuring an overall continuous and smooth flow path.
Smooth Transition of Channel Volume
Along with the lead taper, the channel cross-sectional area and volume change steadily and synchronously, avoiding sudden expansion or contraction of the material flow path and eliminating flow disturbance.
Complete Flight Self-Wiping Profile
Retains continuous and complete helical flights, with intermeshing profile consistent with standard conveying elements, delivering excellent self-wiping performance and no material retention dead spots.
Customizable Transition Parameters
Starting lead, ending lead, transition section length and flight count matching can all be customized to meet the connection requirements of different functional sections.
Connects Different Functional Process Sections
Realizes smooth connection between feed zone, melting zone, mixing zone, homogenizing zone and other process sections, ensuring the continuity of the overall screw flow path.
Eliminates Material Accumulation Risk at Joints
Eliminates flow path dead spots caused by direct splicing of elements with different leads, reduces risks of material retention, carbonization and degradation, suitable for heat-sensitive materials and frequent color change scenarios.
Steadily Regulates Process Parameters
Gradiently adjusts material fill degree, residence time and shear intensity, avoids step changes of process parameters, and improves the operation stability of the entire production line.
Excellent Dispersion Performance
Narrow crescent gap + dense intermeshing points deliver significantly better dispersive mixing capacity than conventional double-lobe kneading blocks.
Uniform & Consistent Shear
Multi-point uniformly distributed shear ensures consistent shear rate, effectively avoiding local excessive shear and material overheating.
Stable & Controllable Fill Degree
Weaker conveying capacity than double-lobe structure can stably increase the material fill degree in the mixing zone and enhance compounding effect.
Uncompromised Self-Wiping
Used as a complete set with dedicated transition elements, the flow path is continuous with no dead corners, and the self-wiping performance is consistent with standard elements.
| Parameter | Value |
|---|---|
| Product Name | Transition Elements |
| Model | φ11 mm ~ φ350mm |
| Applicable Brands | Most extruders on the market |
| Material | Tool steel, HIP, stainless steel, nickel-based alloy, cobalt-based alloy, etc. |
| Properties | Wear-resisting, Corrode-resisting and Durable |
