Ans:
The principle of extrusion is the process of forcing a material through a die or nozzle to produce a specific shape or cross-sectional profile. This is done by applying pressure to the material, typically using a screw or ram, which pushes it through the die or nozzle. The shape and size of the die or nozzle determine the final shape of the extruded product. Extrusion can be used to produce a wide variety of products, such as pipes, tubing, profiles, and sheets. It is a common method for producing plastics, metals, and other materials.