What Are the Advantages of Bimetallic Screw Barrel Over Traditional Single-Material Screw Barrels?

The bimetallic screw barrel offers clear advantages compared with traditional single-material barrels, making it a preferred choice in modern extrusion and injection molding. Its inner–outer double-layer structure is the foundation of its superior performance. The inner layer, usually made of highly wear-resistant and corrosion-resistant alloy steel, withstands high-speed extrusion and high-temperature processing, ensuring long-term stability. This design significantly improves wear resistance, extends service life, and lowers maintenance costs.

Another major strength of the bimetallic screw barrel is its adaptability. Thanks to its dual-layer structure, it accommodates different plastic raw materials and processing techniques. This flexibility allows manufacturers to handle diverse production needs more efficiently, improving productivity and equipment utilization.

Corrosion resistance is another important benefit. With specially treated alloys in the inner layer, the barrel can resist chemical erosion and withstand demanding conditions involving high temperature, pressure, or aggressive additives. This makes it especially valuable in production environments that require stability and reliability under harsh operating conditions.

Although the initial manufacturing cost of bimetallic screw barrels is higher, their long service life, reduced downtime, and stable performance lower the overall cost of ownership. At the same time, precise processing and consistent performance enhance product quality and improve production efficiency, giving manufacturers a competitive edge.

By combining durability, adaptability, and cost-effectiveness, bimetallic screw barrels represent a smart upgrade over traditional designs for extrusion and injection applications.