An extruder is a machine used to shape materials, typically plastics or metals, by forcing them through a specially designed die. The process involves heating the material until it becomes pliable, then pushing it through the die to create a continuous profile, such as pipes, sheets, or strands. This method is widely used in manufacturing and is essential for producing items like plastic containers and food products. Extruders come in various types, including single-screw and twin-screw extruders, each suited for different applications. The choice of extruder depends on factors like the material being processed and the desired end product. This technology plays a crucial role in industries such as packaging, automotive, and construction.