Profile extrusion involves pushing molten polymers through dies with unique cross-sections, distinct from round, annular, or wide rectangular shapes. The industry currently employs three main die types: orifice, multistage, and tapered profile dies. Orifice dies, comprising a base and a profile-forming plate, are primarily used for low-cost, lower-precision profiles. Their abrupt cross-sectional change often leads to material buildup and limits extrusion speeds, making them more suitable for PVC and rubber than other thermoplastics. Multistage dies feature a series of plates with similar geometry but progressively smaller cross-sections. While an improvement over orifice dies, they share some limitations. For high-precision profiles produced at rapid rates, tapered profile dies are preferred, offering a gradual cross-sectional area reduction. These dies effectively address the shortcomings of both orifice and multistage designs, allowing for more efficient and accurate extrusion of complex profiles.