Product Details
Place of Origin: Jiangsu, China
Brand Name: OEM Replacement
Certification: ISO 9001:2015
Model Number: Customize
Document: Screw Barrel & Elements.pdf
Payment & Shipping Terms
Minimum Order Quantity: 1 Pieces
Price: Timely Quotation
Packaging Details: Export-grade wooden case with rust-proof oil coating and foam partition
Delivery Time: 10-60 Days
Payment Terms: T/T,L/C
Supply Ability: 5000 Pieces per Month
Product Type: |
Low Temperature Rise Kneading Block |
Main Application: |
Heat Sensitive Polymer Compounding |
Typical Materials: |
Temperature-sensitive Polymers, Additives And Formulations |
Main Function: |
Controlled Mixing With Reduced Shear Heating |
Available Configuration: |
Customized Disc Number, Width And Stagger Arrangement |
Material Options: |
W6Mo5Cr4V2 And Selected Wear-resistant Materials |
Internal Connection: |
Spline, Keyway Or Customized Shaft Interface |
Product Type: |
Low Temperature Rise Kneading Block |
Main Application: |
Heat Sensitive Polymer Compounding |
Typical Materials: |
Temperature-sensitive Polymers, Additives And Formulations |
Main Function: |
Controlled Mixing With Reduced Shear Heating |
Available Configuration: |
Customized Disc Number, Width And Stagger Arrangement |
Material Options: |
W6Mo5Cr4V2 And Selected Wear-resistant Materials |
Internal Connection: |
Spline, Keyway Or Customized Shaft Interface |
This low temperature rise kneading block is designed for twin screw extrusion processes where heat sensitive polymers require mixing with reduced shear heating.
In many temperature-sensitive formulations, excessive mechanical shear in the mixing section can generate additional heat inside the material. If this temperature rise is not controlled, the polymer may experience thermal degradation, discoloration, unstable viscosity or other processing problems.
This kneading block is intended to provide mixing while helping reduce unnecessary temperature increase during compounding.
It helps reduce problems such as:
| Item | Available Configuration |
|---|---|
| Product type | Low temperature rise kneading block |
| Main application | Heat sensitive polymer compounding |
| Typical materials | Temperature-sensitive polymers, additives and formulations |
| Main function | Controlled mixing with reduced shear heating |
| Available configuration | Customized disc number, width and stagger arrangement |
| Material options | W6Mo5Cr4V2 and selected wear-resistant materials |
| Internal connection | Spline, keyway or customized shaft interface |
| Manufacturing basis | Drawing, sample or measured dimensions |
| Inspection | Dimensions, disc profile, internal connection and surface condition |
| Main purpose | Improve mixing while reducing unnecessary temperature rise |
In twin screw compounding, material temperature is influenced not only by external heating but also by mechanical energy introduced by the screw elements.
Kneading blocks can contribute significantly to this internal heat generation because they repeatedly compress, shear and redistribute the material.
For heat sensitive polymers, excessive temperature rise may cause:
Even when barrel temperatures are set correctly, the real melt temperature may still become too high if the screw configuration introduces excessive shear.
For this reason, temperature-sensitive materials often require a screw design that balances mixing performance and internal heat generation.
A low temperature rise kneading block is intended to perform mixing more gently than a more aggressive mixing section.
Its purpose is not to remove mixing completely, but to reduce unnecessary shear work that raises melt temperature.
Possible benefits include:
The actual result depends on the full process, including screw speed, throughput, polymer viscosity, barrel-temperature setting, cooling capacity and the overall screw configuration.
This type of kneading block may be considered in processes involving:
The specific suitability should always be evaluated according to the actual material system and process target.
A kneading block for heat sensitive polymer compounding should be selected according to the actual formulation and thermal risk.
Important considerations include:
In some processes, only one controlled mixing section is required. In others, several kneading positions may need to be adjusted to achieve the desired balance between mixing and temperature control.
A replacement kneading block must match both the shaft connection and the external geometry required by the current screw arrangement.
Critical features include:
If the replacement geometry is incorrect, the kneading block may change the original process behavior even if it can be installed on the shaft.
For this reason, replacement production should be based on:
W6Mo5Cr4V2 is a practical material for many general compounding applications and can be used where the kneading block requires reliable dimensional and service performance.
If the formulation also contains abrasive fillers or additives, upgraded wear-resistant material can be selected to help maintain disc geometry while still meeting the required process function.
Material selection should consider both wear condition and compounding function.
Inspection can include:
Dimensional records can be retained for repeat orders and future replacement reference.
Please provide:
Send us your screw drawing, material information and current overheating or degradation problem.
We can help evaluate: