The extruder barrel is a critical component of the twin-screw extruder's processing portion. It is constructed as a modular body with a precision-machined inner bore, which creates a high-accuracy working chamber that collaborates with the various screw functional stages to convey, melt, mix, react, and generate pressure.

The screw barrel, which serves as the outer load-bearing structure of the extruder screw system, is subjected to sustained high temperature, high pressure, high shear, and abrasive wear. Consequently, it must exhibit reliable wear resistance, mechanical strength, and thermal management. The screw barrel maintains a consistent temperature field by means of precise heating and cooling control, which ensures dependable processing conditions for a variety of material systems.

The wear and corrosion resistance of Lesun extruder barrels is enhanced by the use of high-performance wear-resistant liner materials, including nickel-based alloys and tungsten-carbide composites, in conjunction with advanced surface-strengthening processes, such as laser cladding. They provide straight-bore and spiral cooling channels to ensure efficient and stable temperature control, and they support a variety of heating methods, including cast copper, cast aluminium, and heating rods.

Lesun extruder barrels are constructed with a modular design that accommodates a variety of connection structures and length configurations ranging from 1D to 12D. They can be combined in a flexible manner to accommodate each process stage and are compatible with the most common twin-screw extruder platforms worldwide, ensuring fast installation and high-precision replacement.