Product Details
Place of Origin: Jiangsu, China
Brand Name: ZHITIAN
Certification: ISO 9001:2015
Model Number: As request
Document: Screw Barrel & Elements.pdf
Payment & Shipping Terms
Minimum Order Quantity: 500mm
Price: Timely quotation
Packaging Details: Wooden Box or Paper Box
Delivery Time: 5-60 days
Payment Terms: L/C,T/T
Supply Ability: 500 Sets / Month
Material: |
WR5 PM-HIP Powder Metallurgy Steel |
Hardness: |
HRC 58-62 |
Heat Treatment: |
Vacuum Quenching |
Surface Treatment: |
Sand Blast / Polishing |
Application: |
Twin Screw Extruder |
Plastic Processed: |
High Mineral Filler Compounds (Calcium Carbonate, Talc) |
Material Feature: |
High Filler Wear Resistance |
Screw Design: |
Double-Screw |
Material: |
WR5 PM-HIP Powder Metallurgy Steel |
Hardness: |
HRC 58-62 |
Heat Treatment: |
Vacuum Quenching |
Surface Treatment: |
Sand Blast / Polishing |
Application: |
Twin Screw Extruder |
Plastic Processed: |
High Mineral Filler Compounds (Calcium Carbonate, Talc) |
Material Feature: |
High Filler Wear Resistance |
Screw Design: |
Double-Screw |
This wear resistant conveying screw element is designed for twin screw compounding applications with high levels of calcium carbonate, talc and other abrasive mineral fillers.
In high-filler processing, mineral particles continuously act on the screw flights and working surface. As the conveying element wears, the screw profile gradually changes, the screw-to-barrel clearance increases and conveying performance becomes less stable.
This screw element is intended to help maintain stable material transport while reducing abrasive wear in conveying sections.
It helps reduce problems such as:
| Item | Available Configuration |
|---|---|
| Product type | Wear resistant conveying screw element |
| Main application | High mineral filler compounding |
| Typical fillers | Calcium carbonate, talc, mica and mineral powder |
| Element function | Material conveying and transport |
| Available geometry | Single-flight, multi-flight or customized conveying profile |
| Material options | W6Mo5Cr4V2 and selected PM wear-resistant steels |
| Internal connection | Spline, keyway or customized profile |
| Manufacturing basis | Drawing, sample or measured dimensions |
| Customization | OD, length, pitch, flight geometry and internal spline |
| Inspection | Dimensions, profile, internal connection and surface condition |
| Main purpose | Reduce wear and maintain stable conveying performance |
Mineral-filled compounds are widely used to reduce formulation cost or improve stiffness, dimensional stability and other product properties.
However, calcium carbonate, talc and similar fillers also increase abrasive load inside the extruder.
During production, mineral particles repeatedly move between:
This repeated abrasive action gradually wears the working profile of the conveying element.
Wear can become more severe when the process also involves:
As the conveying flights wear, the original conveying geometry is lost and the element becomes less effective at moving material forward.
A conveying element is not only a rotating part. Its geometry directly affects how material is transported through the barrel.
When wear becomes excessive, several process issues may appear:
For this reason, high-filler conveying elements should be selected according to actual wear conditions rather than only the nominal machine size.
Important selection factors include:
In many mineral-filled formulations, the conveying section near filler introduction or before high-pressure zones may experience more severe wear than standard low-load sections.
W6Mo5Cr4V2 is a practical wear-resistant material for many mineral-filled compounding applications.
It offers improved wear resistance over more conventional material systems and can be used in many conveying positions exposed to abrasive fillers.
For more demanding high-filler applications, selected powder metallurgy materials can be considered.
These materials can provide a different balance of:
The most suitable material should be chosen according to the real formulation and operating conditions rather than selecting only by maximum hardness.
Not every screw element in a complete screw shaft experiences the same wear level.
More severe wear often appears around:
For this reason, it is not always necessary to upgrade every element in the full screw configuration.
Higher-performance materials can be concentrated in the most heavily worn conveying positions. This helps improve service life while keeping replacement cost under control.
A replacement conveying element must do more than fit the shaft.
The following features should match the existing screw system correctly:
If the external profile or internal connection is incorrect, the element may not work properly in the existing screw arrangement.
For this reason, replacement production should be based on:
Inspection can include:
Dimensional records can be retained for future repeat orders and replacement reference.
Please provide:
This information helps determine whether the main problem is normal abrasive wear, severe profile loss or a broader screw-and-barrel clearance issue.
The correct material depends on filler percentage, particle characteristics, screw speed and service-life target. W6Mo5Cr4V2 or selected PM wear-resistant steels can be considered for severe abrasive service.
As the flights wear, the conveying geometry changes and material can backflow more easily through the enlarged screw-to-barrel clearance. This reduces conveying efficiency and can affect downstream process stability.
No. Higher-performance materials can be concentrated in the conveying positions with the highest abrasive load.
Yes. Screw and barrel wear together determine the actual working clearance. Replacing only the screw element may not fully restore performance if the barrel is also severely worn.
Send us your material formulation, filler percentage, existing screw element material and photographs of the worn element.
We can help evaluate: