The main equipment of puffed fish meal is fish meal special extruder. The working principle of puffing machine is: the material is sent into the puffing machine, and the screw screw pushes the material to form the axial flow. At the same time, due to the mechanical friction between the screw and the material, the material and the barrel, and the material, the material is strongly squeezed, stirred, and sheared. As a result, the material is further refined and homogenized. With the gradual increase of pressure, the temperature rises accordingly. Under the conditions of high temperature, high pressure, and high shear, the physical properties of the material change from powder to paste, and the protein denatures, and the fiber is partially degraded and refined. Germs were killed, health indicators improved, and toxic ingredients were inactivated. When the paste material is ejected from the die hole, the material is puffed, dehydrated, and cooled under the action of a strong pressure difference. The expanded product structure is loose, porous, and crisp, and has good palatability and flavor.
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