Key points of puffed feed production technology
Key points of puffed feed production technology
The application of twin-screw extruder in the production of extruded feed The key to the production process of extruded feed lies in the extrusion process, and the twin-screw extruder is an important equipment to complete this process. The screw sleeve and screw in the extruder can squeeze and shear the feed material, and extrude the die hole under high temperature and high pressure environment. When being extruded, due to the effect of internal and external pressure difference, it can realize rapid expansion. role. The puffing process is generally divided into dry and wet processing methods according to whether water needs to be added. Dry puffing does not require additional water during raw material processing. It is formed by extrusion air extrusion. The process of wet puffing is more complicated than that of dry puffing. Therefore, the mechanical structure is also more complicated than that of dry puffing machines. The raw materials need to be modulated before they can enter the puffing chamber. Additional water filling device and steam pouring device. The specific operation steps of wet extruding are as follows: first, transport the pulverized and mixed raw materials to the modulator, add a certain amount of water according to the feed production, and adjust the appropriate temperature, and then send the prepared feed into the extruding cavity, and in the extruder The pressure and temperature are gradually increased under the action of the high-speed operation of the screw in the cavity, and the pressure and temperature at the outlet of the puffing cavity reach the maximum. When the feed enters the normal pressure environment through the ring die hole, the steam escapes quickly and the pressure suddenly decreases, thus forming the feed. Violent expansion.
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