Counter-Rotating Parallel Twin Screw Barrel

Nanhaiya counter-rotating parallel twin screw barrel features screws that rotate in opposite directions, producing strong inter-screw shear for enhanced compounding and kneading. It is ideal for processing sensitive materials that require low thermal stress. The barrel is manufactured from high-grade 38CrMoAlA with a nickel-based tungsten carbide alloy layer for superior wear resistance. Each unit is precision machined to ensure exact clearance, providing smooth rotation and consistent material flow. This design is particularly effective for PVC pipes，PVC profiles, WPC panels, and polymer blends that require uniform dispersion.

Product Parameter (Specification)

Product Feature and Application

The co-rotating design allows both screws to rotate in the same direction, producing strong intermeshing and continuous conveying action. This ensures high throughput and uniform melting, making it ideal for compounding, pipe extrusion, and sheet production. The barrel is crafted from premium steel and lined with nickel-based tungsten carbide alloy to resist wear and corrosion. Each barrel is finely machined for precise clearance, ensuring smooth rotation, consistent pressure, and reduced mechanical vibration.

Production Details

Each Nanhaiya parallel twin screw barrel undergoes advanced CNC machining and precision grinding. The surface is mirror-finished to minimize friction and improve plastic flow. The screw flight is hardened by nitriding or bimetallic alloy coating for long-term stability.