Extruding technology and feed pellet production processing.
1, Extruding process for the application of the basic principle of extruding processing.
The main equipment for the screw extruder". The material is fed into the extruder, and the screw is pushed to drive the material to form an axial flow. At the same time, because of the spiral and the material, the material and the machine barrel and the material inside the mechanical friction, the material is strongly extrusion, mixing, shearing, the results of the material is further refined, homogenization. With increasing pressure, temperature rises, under high temperature, high pressure and high shear conditions, material properties change, by powder into a paste, starch gelatinization, denatured protein, fiber quality degradation, refinement, causing bacteria are killed, and improve health indicators, inactivation of toxic ingredients. When the paste material from the die orifice discharge moment, in the strong pressure difference, the material is puffing, drying, cooling, extrusion product structure is loose, porous, friable and good taste and flavor.