Nanjing Zhitian Mechanical And Electrical Co., Ltd.
| Delivery Time | 5-7 working days for stock, 15-25 days for production |
| Material | Bimetallic Alloy (Wear-Resistant Layer on Tough Core) |
| Number of Discs | 5-Disc Configuration |
| Screw Diameter | 42mm |
| Element Type | Kneading Block (Mixing Disc) |
| Application | Glass Fiber Reinforced PA, PC, PBT, PET, PPS Compounding |
| Supply Ability | 800 Pieces per Month |
| Hardness | HRC 60-64 (Surface Layer) |
| Payment Terms | T/T,L/C |
| Packaging Details | Anti-rust oil coated, individually wrapped in VCI film, packed in export-grade plywood case |
| Heat Treatment | Vacuum Brazed + Post-Weld Heat Treatment |
| Staggering Angle | 45° (Forward Conveying) |
| Model Number | KB-42-BM-GF |
| Certification | ISO 9001:2015 |
| Brand Name | zhitian |
| Place of Origin | China |
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Product Specification
| Delivery Time | 5-7 working days for stock, 15-25 days for production | Material | Bimetallic Alloy (Wear-Resistant Layer on Tough Core) |
| Number of Discs | 5-Disc Configuration | Screw Diameter | 42mm |
| Element Type | Kneading Block (Mixing Disc) | Application | Glass Fiber Reinforced PA, PC, PBT, PET, PPS Compounding |
| Supply Ability | 800 Pieces per Month | Hardness | HRC 60-64 (Surface Layer) |
| Payment Terms | T/T,L/C | Packaging Details | Anti-rust oil coated, individually wrapped in VCI film, packed in export-grade plywood case |
| Heat Treatment | Vacuum Brazed + Post-Weld Heat Treatment | Staggering Angle | 45° (Forward Conveying) |
| Model Number | KB-42-BM-GF | Certification | ISO 9001:2015 |
| Brand Name | zhitian | Place of Origin | China |
| High Light | Bimetallic Kneading Block Element ，Glass Fiber Mixing Screw Parts ，PA PC PBT Extruder Kneading Disc | ||
This bimetallic kneading block is designed for glass fiber reinforced engineering plastic compounding, including PA, PC, PBT, PET, PPS and PP formulations.
Its bimetallic structure combines a high-hardness wear-resistant alloy layer with a tough steel core. The metallurgically bonded construction improves resistance to abrasive wear while retaining the structural toughness required for high-torque twin screw extrusion.
The kneading block features a high-hardness alloy surface layer metallurgically bonded to a tough steel core.
The wear-resistant layer protects the kneading disc edges and working surfaces from continuous abrasion caused by glass fibers, while the core provides the toughness and load-bearing capacity required under demanding compounding conditions.
The surface hardness can reach HRC 60–64, depending on the selected alloy and confirmed heat-treatment specification.
The five-disc, 45° forward-staggered configuration provides a practical balance between mixing intensity and forward material conveying.
It is suitable for applications requiring improved glass fiber wetting and distribution without generating the excessive back pressure associated with more restrictive kneading configurations.
Disc quantity, disc width and staggering angle can also be customized according to the polymer type, glass fiber content, output requirement and target fiber length.
The kneading discs generate controlled shear and elongational flow, helping the polymer melt wet the glass fibers and distribute them more uniformly throughout the matrix.
Improved fiber distribution can help reduce agglomeration and support more consistent mechanical properties in the finished compound.
Glass fiber compounding requires a controlled balance between mixing intensity and fiber length retention.
Excessive shear can improve distribution but may also shorten the fibers and increase melt temperature. The kneading angle, disc width and installation position should therefore be selected according to the required mechanical properties and processing conditions.
The bimetallic wear layer provides improved resistance to profile loss and disc-edge wear compared with conventional nitrided kneading blocks when processing abrasive glass fiber reinforced materials.
Actual service life depends on the glass fiber content, polymer type, screw speed, output, screw configuration and operating conditions.
Each kneading block is precision machined according to the confirmed drawing, sample or technical dimensions.
Critical dimensions, including the outer diameter, element width, disc angle, bore and spline profile, are inspected to support accurate installation and reliable matching with the existing screw shaft and adjacent elements.
Long glass fiber compounds require a dedicated low-shear screw configuration and should be evaluated separately according to the required final fiber length.
Each kneading block is inspected according to the confirmed drawing and technical requirements before shipment. Inspection items may include:
Depending on the product specification, inspection methods may include dimensional measurement, hardness testing, dye penetrant inspection and metallographic verification of the bimetallic bonding structure.
Material certificates and dimensional inspection records can be provided upon request.
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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