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Twin Screw Extruder Bimetallic Sleeve Liner / Bimetallic Bushing
1 . Description
The twin screw extruder bimetallic sleeve liner or bimetallic bushing is a component used in twin screw extruders to protect the extruder screws and barrel from wear and corrosion. It is typically made by welding together two different alloys, a high-wear resistance alloy and a high-corrosion resistance alloy, to create a composite structure that can withstand the harsh conditions of extrusion.
The bimetallic sleeve liner or bushing is placed inside the barrel of the twin screw extruder and provides a smooth and wear-resistant surface for the screws to rotate against. It also helps to prevent the screws from coming into direct contact with the barrel, which can cause damage and reduce the lifespan of the equipment.
The bimetallic sleeve liner or bushing is an important component of twin screw extruders, as it can significantly improve the durability and performance of the equipment. By protecting the screws and barrel from wear and corrosion, it can help to reduce downtime, maintenance costs, and the need for frequent replacements.
| Product | Bimetallic sleeve liner / bimetallic bushing |
| Hardness after hardening and tempering | HB260°~320° |
| Nitrided Hardness | HV950°~1000° |
| Nitrided Depth | 0.50~0.7mm |
| Nitrided Brittleness | above 2 stage |
| Surface Roughness | Ra0.4 |
| Screw straightness | 0.015mm |
| Hardess of surface chromium-plating after Nitriding | HV≥950HV |
| Chromium-plating Depth | 0.05~0.10mm |
| ALLoy Depth | 0.8~2.0mm |
| Alloy hardness | HRC56°~65° |
| Alloy | iron,nickel,tungsten,molybdenum |
2 . The application
The twin screw extruder bimetallic sleeve liner or bimetallic bushing is a crucial component used in twin screw extruders for various applications, including:
1. Polymer processing: In polymer processing applications, the bimetallic sleeve liner or bushing is used to protect the extruder screws and barrel from wear and corrosion caused by the harsh processing conditions. It helps to maintain the quality and consistency of the extruded polymer products.
2. Food processing: In food processing applications, the bimetallic sleeve liner or bushing is used to prevent contamination of the food products by reducing the wear and tear of the extruder components.
3. Chemical processing: In chemical processing applications, the bimetallic sleeve liner or bushing is used to handle aggressive chemicals and corrosive materials. It helps to maintain the integrity of the extruder equipment and prevent the degradation of the final product.
4. Pharmaceutical processing: In pharmaceutical processing applications, the bimetallic sleeve liner or bushing is used to prevent contamination of the pharmaceutical products by reducing the wear and tear of the extruder components.
Overall, the twin screw extruder bimetallic sleeve liner or bimetallic bushing is a versatile component that can be used in a wide range of industrial applications to improve the durability and performance of the equipment.
3 . Material with processing technology
Base Materials: | 1)38CrMoAlA(SACM 645) 2)42CrMo(AISI 4140) 3)Cr12MoV(SKD11) 4)4Cr5MoSiV1(SKD61) 5)9Cr18MoV 6)40Cr |
Bimetallic Alloy Materials: | 1)Fe-based alloy 2)Ni-based alloy 3)Co-based alloy 4)Tungsten carbide |
Processing Technology: | Heat treatment High-frequency quenching Nitriding treatment Hard-chrome electroplating Bimetallic alloy welding Bimetallic alloy centrifugal casting |
4 . Comparsion of the output (LDPE)
Pressure is generated if resin passes over the barrier, forcing any air in the melted resin back to the feed side and effectively preventing the intrusion of air bubbles on the sub flight side. This is highly effective with resins that generate bubbles such as PS, PA, PET and EVOH.
5 . Parallel twin screw and barrel application
1)PP
2)PE
3)PVC
4)WPC
5)SHEET/PIPE/PROFILE/ FOAM BOARD
6)CRANULAR TWIN SCREWS EXTRUDERS
Bimetallic Treatment of Screw element and barrel
Bimetallic treatment of screw elements and barrels involves the use of two different alloys to create a composite structure that combines the properties of both materials. This treatment is used to improve the wear resistance, corrosion resistance, and overall durability of the extrusion equipment.
In the bimetallic treatment process, a high-wear resistance alloy is welded onto the surface of the screw elements and barrel, creating a hard and wear-resistant outer layer. The high-wear resistance alloy is typically made of materials such as tungsten carbide, cobalt-chromium alloy, or nickel-based alloys.
Next, a high-corrosion resistance alloy is welded onto the surface of the high-wear resistance alloy layer. The high-corrosion resistance alloy is typically made of materials such as stainless steel, nickel-based alloys, or aluminum bronze. This layer provides protection against corrosive materials and environments.
The bimetallic treatment of screw elements and barrels is used in a variety of extrusion applications, including plastic extrusion, food processing, chemical processing, and pharmaceutical processing. The treatment helps to extend the lifespan of the extrusion equipment by reducing wear and corrosion, which can lead to increased productivity, reduced downtime, and lower maintenance costs.
Overall, the bimetallic treatment of screw elements and barrels is an effective way to improve the performance and durability of extrusion equipment in various industrial applications.
6 . As per customer's demand,we can also supply below:
PVC/PE Film Blowing Screw;
Blow Molding Screw;
PS/PE/PP/ABS Sheet Extrusion Screw;
PE Aluminum Plate;
PPR Pipe Screw;
EVA Extrusion Screw;
HDPE High efficiency Screw;
PET Straps Screw;
XPS/EPE Foamed Screw;
Granulation Screw,Vented single screw etc.
