Extruder Screws and Barrels
Harden Machinery is the premier designer, manufacturer and rebuild of feed screws and barrels in China for the plastics, medical, rubber and food industries. We have been supplying extruder screws to some of the major extruder manufacturers in China and around the world.
Product Range
Harden Machinery's extruder single screws and cylinders focus on extrusion process with carefully choosing of steel material and construction to match with your applications. Carbide hardening of screw flights and chrome coating of screws are available.
Harden Machinery's counter rotating conical and parallel twin screws and cylinders focusing on providing long lasting life for both the screws and barrel. Carbide coating hardening of screw flights is also available.
Harden Machinery supplies bi-metallic barrel for high corrosive and high abrasive materials. A layer of tungsten carbide alloy is pasted on the ID of the barrel using centrifugal casting process. The wear resistance layer greatly increase the life of barrels. For screws, optional chrome coating and WC spray welding on flights are available.
Screw & Barrel Ranges
| Injection Molding Machine | Clamping Force: 25kN – 3,200kN |
|---|---|
| Injection Volume: 30g – 25,000g | |
| Single Screw Extruder | Screw Diameter: 15mm – 300mm |
| L/D Ratio: 15-46 | |
| Conical Twin-screw Extruder | Screw Diameter: 35mm – 92mm |
| Counter-Rotating Parallel Twin-screw | Screw Diameter: 50mm – 180mm |
| L/D Ratio: 16-35 | |
| Co-rotating Twin-screw Extruder | Screw Diameter: 25mm – 120mm |
Screw Technical Specifications
| Steel Material | DIN 41CrA1Mo7 / AST M4140 |
|---|---|
| Heat Treatment | Tempered and nitride, nitride depth: 0.5 mm – 0.7 |
| Surface hardness: | HV900 – HV1, 000 |
| Chromate plating: | Thickness 0.05 mm – 0.10 mm, hardness HV950 |
| Special treatment: | Carbide coating (screw flight) and bimetallic barrel |
| Screw straight tolerance | 0.015 mm/m |
| Surface roughness | Ra 0.4μm |
New replacement screws and barrels from China for lower cost than refurbished ones. Try it and believe it, with satisfactory quality and cost saving for your production need.
