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The Difference between SUNSHINE Industrial Wet And Dry Feed Extrusion Machinery

Views: 0     Author: Site Editor     Publish Time: 2024-09-02      Origin: Site

There are two types of extruded feed using twin-screw feed extruders, one is dry extrusion and the other is wet extrusion.


Below we analyze and compare two different extrusion methods in the dog food extrusion process:


Dry extrusion requires adding water to the raw materials during the production process. The raw materials are not pre-conditioned before entering the extrusion chamber, and all the heat generated during the extrusion process is generated by the raw materials through the screw, shear plate and extrusion chamber under the action of mechanical extrusion.


The difference between wet extrusion and dry extrusion is that the raw materials are pre-conditioned before entering the extrusion, and the temperature is increased by steam or water to pre-cook. The so-called conditioning refers to the use of steam to heat and wet the raw materials of pet food, so that the starch in the raw materials is pre-gelatinized, the protein is denatured, and the raw materials are softened, which is conducive to improving the extrusion granulation effect and extrusion quality of dog food.


The difference between wet and dry feed extrusion machinery:


Wet extrusion also has the advantages of good extrusion effect and stable extrusion rate. In the dog food processing process, the use of wet puffing and pre-adjustment technology has a very important role and significance. However, compared with the dry expansion method, it also has defects such as expensive equipment, equipment requirements, and cumbersome equipment control.

According to the quality adjustment method, it is the above-mentioned dry and wet expansion methods. It can be divided into single-screw feed puffing machinery and twin-screw feed puffing machinery.

The puffing process of single-screw puffing machinery is relatively simple and widely used. It can be used for products with high water content and fat content greater than 17%, and the starch gelatinization degree can reach more than 90%. Compared with the single-screw feed puffing machinery, the twin-screw feed puffing machinery is more complex in equipment and structure, but it has the advantages of stable puffing performance, high product yield, high production efficiency, and basically sterile after puffing.

In recent years, puffing technology has been widely used in pet food and dog food processing technology, especially after the 1980s, it has been rapidly developed in pet food, semi-dry food, pet food and other leisure foods. Puffing technology has greatly improved the palatability, nutrition, digestion and absorption of pet food.


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