How to Improve Barrel Durability in Twin Screw Extruders for Engineering Plastics Compounding

In the engineering plastics industry, the twin screw extruder barrel plays a critical role in ensuring long-term stability and efficiency of the compounding process. However, continuous high-temperature, high-shear, and highly corrosive environments bring significant challenges to barrel materials and manufacturing quality.

Zhitian, founded in 2006, specializes in precision manufacturing of twin screw extruder barrels for engineering plastics granulation. With two production bases in Nanjing and Anhui, Zhitian integrates advanced CNC machining, laser cladding, and proprietary alloy technology to address the demanding needs of engineering plastics like PA, PBT, PC, PPS, and LCP.

• Laser Cladding Technology: Zhitian applies a 1.5mm thick nickel-tungsten carbide alloy layer to the barrel's inner wall. This metallurgically bonded coating significantly enhances wear and corrosion resistance, especially for glass fiber-filled engineering plastics.
• Custom Alloy Solutions: Zhitian's proprietary materials such as ZT818 (Co-based carbide) provide 20 times the wear resistance of traditional tool steel (e.g., W6Mo5Cr4V2), making it a reliable choice for extreme compounding conditions.
• Adaptability: Compatible with a wide range of extruder models (diameter from 25mm to 150mm), the barrel can be customized based on torque grade, venting zones, and liner type (sleeved or integrated).

• Engineering plastics pelletizing (PA6, PA66, PC, PBT, PPS, LCP)
• High-glass-fiber filled masterbatch compounding
• Flame-retardant and conductive additive extrusion
• Recycled engineering polymer granulation

Apply a nickel-tungsten carbide alloy coating using laser cladding technology. Zhitian's ZT818 solution provides exceptional durability for high-glass-content formulas.

Barrels with integrated or sleeved liners made from PM-HIP or cobalt-based materials are recommended, especially when processing materials like LCP, PPS, or flame-retardant PA.

Yes. Zhitian supports vented and vacuum barrel designs, and provides modular zones for side feeding, devolatilization, and pressure control.