The extruder integrates multiple functions such as compression, mixing, mixing, shearing, melting, sterilization, expansion, and molding, and completes them in a very short time. The change of the mold can change the shape and size of the product infinitely. The twin-screw extruder can produce a wide variety of foods, including snack foods, breakfast cereals, sandwich puffed foods, instant rice noodles, soups, bread slices, textured vegetable protein, candy, seasoning components, pet food