| Application | Filler / Fiber / Powder Side Feeding |
| Length | 200–1000 mm / Customized |
| Material Options | 38CrMoAl / Tool Steel / Stainless Steel / Alloy |
| Screw Structure | Single Flight / Double Flight / Tapered |
| Installation | Horizontal / Inclined |
| Place Of Origin | China |
| Packaging Details | Wooden Case |
| Delivery Time | 5-60 Days |
| Payment Terms | T/T,L/C |
| Supply Ability | 500 Sets / Month |
| Outer Diameter | 25–100 mm / Customized |
| Replacement Support | Drawing / Sample / Measured Dimensions |
| Product Type | Side Feeder Screw |
| Brand Name | Zhitian |
| Model Number | Customize |
| Certification | Iso:9001 |
View Detail Information
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Product Specification
| Application | Filler / Fiber / Powder Side Feeding | Length | 200–1000 mm / Customized |
| Material Options | 38CrMoAl / Tool Steel / Stainless Steel / Alloy | Screw Structure | Single Flight / Double Flight / Tapered |
| Installation | Horizontal / Inclined | Place Of Origin | China |
| Packaging Details | Wooden Case | Delivery Time | 5-60 Days |
| Payment Terms | T/T,L/C | Supply Ability | 500 Sets / Month |
| Outer Diameter | 25–100 mm / Customized | Replacement Support | Drawing / Sample / Measured Dimensions |
| Product Type | Side Feeder Screw | Brand Name | Zhitian |
| Model Number | Customize | Certification | Iso:9001 |
| High Light | Wear Resistant Alloy Structure Screw ,Twin Screw Extruder Side Feed Screw | ||
Stable side feeding becomes increasingly difficult when a compounding line processes abrasive fillers, glass fiber, powders or regrind materials. Wear on the screw flights, unsuitable conveying geometry or excessive clearance can gradually reduce feeding efficiency and make the actual feed rate less consistent.
The side feeder screw is designed for twin screw extrusion lines where fillers and reinforcing materials must be introduced reliably into the main extruder. Available configurations can be adapted to material characteristics, required feeding capacity, installation layout and existing side feeder dimensions.
Typical applications include glass fiber, calcium carbonate, talc, wood powder, mineral fillers and regrind plastics. Current product configurations include outside diameters from 25 to 100 mm, customized lengths from 200 to 1000 mm, and single-flight, double-flight or tapered structures.
Side feeding problems are not always caused by the feeder motor or hopper.
As screw flights wear, the effective conveying geometry changes and the clearance between the screw and barrel may increase. This can reduce material transport efficiency, particularly with low-bulk-density powders or abrasive fillers.
A properly matched twin screw extruder side feeder screw can help address several common problems: unstable filler intake, declining feeding capacity after long-term operation, rapid screw wear from glass fiber or mineral fillers, poor material transfer into the main extruder, and difficulty replacing an obsolete or worn original screw.
The objective is not simply to manufacture a harder screw. The geometry, material and dimensional fit must work together.
Different side-fed materials behave differently inside the screw channel.
Powders such as calcium carbonate or talc may have very different bulk density and flow behavior from chopped glass fiber or plastic regrind. The flight configuration should therefore be selected according to the actual material rather than using one standard geometry for every application.
| Feeding Material | Typical Concern | Design Focus |
|---|---|---|
| Glass Fiber | Abrasive wear and consistent intake | Wear resistance and stable conveying |
| CaCO₃ / Talc | Powder flow and high filler loading | Channel volume and conveying geometry |
| Wood Powder | Low bulk density and irregular flow | Stable filling and material transport |
| Regrind Plastics | Irregular particle shape | Sufficient channel volume |
| Other Powders | Bridging or fluctuating feeding | Material-specific screw geometry |
Single-flight, double-flight and tapered designs can be evaluated according to the feeder configuration and material behavior.
However, screw geometry alone does not determine feeding capacity. Hopper design, feeder speed, material bulk density, side-feeder barrel clearance and the ability of the main extruder to accept the incoming material also influence actual performance.
Side feeder screws handling glass fiber and mineral fillers operate under abrasive conditions. Progressive flight wear can change both the screw profile and the working clearance.
Material selection should therefore consider the actual wear mechanism.
Available options can include nitriding steel such as 38CrMoAl, tool steel for higher wear resistance, stainless steel for corrosion-related conditions and other alloy solutions for more demanding applications. The existing product also supports multiple surface-treatment routes depending on material and operating requirements.
The correct choice should be based on filler type, filler percentage, screw speed, operating time, corrosion risk and the service life of the existing screw.
A wear resistant side feeder screw is most valuable when the material and treatment are selected for the real process instead of simply specifying maximum hardness.
For replacement work, outside diameter alone is not enough.
The new side feeder screw should be matched to the existing assembly for screw diameter, overall length, flight profile, pitch, shaft connection, drive interface, end dimensions and working clearance with the side feeder barrel.
The current product range supports customized OD and length, which makes it suitable for replacement projects where the original screw is worn or no longer easily sourced.
If an original drawing is unavailable, the existing screw can be measured. However, worn flight surfaces should first be identified so that the worn dimensions are not directly reproduced in the new component.
Replacing only the screw may not fully restore feeding performance if the side feeder barrel is already heavily worn.
Excessive screw-to-barrel clearance can reduce conveying efficiency even when the new screw geometry is correct.
For this reason, we recommend checking the screw and barrel together when the customer reports a significant loss of side-feeding capacity.
This is especially important in high-filler or glass-fiber applications where both components may experience abrasive wear.
The existing product supports both horizontal and inclined installation configurations.
Installation orientation can affect the overall feeder arrangement, material entry and mechanical interface. For replacement projects, the existing mounting direction, drive position and connection to the main extruder should therefore be confirmed before manufacturing.
To start a side feeder screw replacement or optimization review, provide the side feeder model or photos, screw outside diameter, overall length, processed material, approximate filler or fiber content, and the current problem such as wear, reduced feed rate or unstable feeding.
If available, a drawing or an existing sample can be used for dimensional confirmation.
Yes, if the side feeder barrel, shaft, drive and other components are still within acceptable condition. The new screw must match the existing interfaces and operating clearance.
Possible causes include worn screw flights, increased screw-to-barrel clearance, unsuitable screw geometry, feeder-speed variation, material bridging or changes in bulk density.
No. Material should be selected according to abrasion, corrosion, impact, operating speed and cost. Over-specifying material does not automatically improve feeding performance.
Yes. A worn sample can be measured, but the original geometry should be reconstructed by identifying the areas that have already lost material during service.
If your side feeder is showing reduced capacity, unstable filler intake or rapid screw wear, send us the existing screw dimensions, processed material and photos of the worn area.
We can evaluate screw geometry, material, wear condition and replacement dimensions before manufacturing.
Send Your Side Feeder Screw Data for Replacement and Feeding Review
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
2006
Total Annual:
10000000-12000000
Employee Number:
100~150
Ecer Certification:
Verified Supplier
Specializing in the production of twin-screw extruder parts Zhitian, a high-tech enterprise and Jiangsu Province-certified Specialized, Refined, Distinctive, and Innovative (SRDI) company, has specialized in twin-screw extruder parts for over two decades. With two production bases in Nanjing... Specializing in the production of twin-screw extruder parts Zhitian, a high-tech enterprise and Jiangsu Province-certified Specialized, Refined, Distinctive, and Innovative (SRDI) company, has specialized in twin-screw extruder parts for over two decades. With two production bases in Nanjing...
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