Twin Extruder Screw Elements High Wear Screw Segments For PE PP PVC ABS Extrusion

Twin Screw Extruder Elements | High-Wear Screw Segments for PE, PP, PVC, ABS Extrusion

Twin Screw Element for Co-Rotating Twin Screw Extruder

Product Overview

High-precision twin screw elements engineered specifically for co-rotating twin screw extruders. Designed to handle demanding plastication, compounding, masterbatching, and recycling applications for materials including PE, PP, PVC, and ABS used in pipe, film, sheet, and profile extrusion lines. Manufactured with premium alloy steels and advanced heat/surface treatments to deliver exceptional wear and corrosion resistance, optimal melt homogeneity, self-wiping capability, and long operational life.

Technical Specifications

• Diameter Range: 15.6 mm to 200 mm+ (Customizable to fit standard extruder sizes)

• L/D Ratio Range: 0.25D to 2.0D per individual segment

• Diameter Ratio (Do/Di): 1.40 to 1.80

• Screw Thread Types: Double-flighted, Triple-flighted, Single-flighted

• Spline / Drive Configurations: Involute Spline (DIN 5480), Hexagonal Shaft, Square Keyway, Single/Multi-Key

• Machining Accuracy: Surface Roughness: Ra <= 0.4 um; Radial Runout Tolerance: <= 0.015 mm

• Hardness Range: Nitrided Steel: HV >= 950 (HRC 65-68); Tool Steel / HIP PM Steel: HRC 60-65; Bimetallic Alloy Layer: HRC 58-64

• Nitriding Layer Depth: 0.4 mm - 0.7 mm

Applications & Processing Scenarios

• Pipe Extrusion Lines (PE / PP / PVC): High-torque conveying and melting elements ensure maximum throughput; low-shear profiles for rigid PVC prevent thermal degradation and preserve physical properties.

• Film Extrusion Lines (PE / PP / ABS): High-dispersion kneading and tooth mixing elements eliminate gel spots, fish eyes, and color streaks for stable multi-layer co-extrusion.

• Resin Compounding & Masterbatch Production: Intensive dispersive and distributive mixing blocks ensure uniform pigment dispersion and withstand severe abrasive wear from glass fibers and calcium carbonate (CaCO3).

Why Choose Us

• Precision Metallurgy & Material Grade: We source certified premium raw materials and utilize high-density HIP powder metallurgy to maximize anti-abrasion and anti-corrosion properties under high-torque processing conditions.

• 100% Interchangeability & Self-Wiping Fit: CNC multi-axis profile machining guarantees tight manufacturing tolerances, ensuring exact intermeshing geometry, smooth self-wiping cleaning action, and seamless drop-in fit for major OEM extruder brands.

• Extended Service Life: Proprietary heat treatment and optional bimetallic PTA cladding double the operational lifespan compared to standard tool steel elements, reducing maintenance downtime and total cost of ownership.

• Strict Quality Control: Every screw element undergoes 100% coordinate measuring machine (CMM) inspection, hardness verification, and metallographic testing prior to export packaging.

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