Extruders are machines used to process and shape materials by forcing them through a die. In the context of polymer processing, twin-screw extruders are particularly significant. These machines have two intermeshing screws housed within a barrel, which rotate to mix, convey, and shape materials. Twin-screw extruders can be classified into two types based on the direction of screw rotation: co-rotating and counter-rotating. In twin co-rotating extruders, both screws rotate in the same direction. This configuration is known for its efficient mixing capabilities, making it ideal for compounding, blending, and reactive extrusion processes. The intermeshing screws create a self-wiping action, reducing the risk of material build-up and improving heat transfer. Co-rotating twin-screw extruders offer several advantages, including high throughput, excellent mixing and dispersing capabilities, and flexibility in processing a wide range of materials, from plastics and rubbers to food and pharmaceuticals. However, they can be more complex and costly compared to single-screw extruders. Despite the higher initial investment, their efficiency and versatility often justify the cost, especially in applications requiring precise control over material properties and consistent product quality.