How Are Fish Food Pellets Made Using a mini fish feed machine?

Raw Material Pretreatment: Laying the Foundation for Extrusion. The first step requires designing a formula based on the farmed fish species. Floating feeds need to have a higher starch content (35%-50%), while sinking feeds can have a lower content (25%-35%). The core ingredients are combined with corn flour, wheat flour (starch source), fish meal, and soybean meal (protein source), with the addition of vitamins, minerals, and other nutritional additives. The raw materials need to be screened to remove impurities such as metal and stones, and then crushed to 80-100 mesh to ensure uniform particle size. The moisture content is then adjusted to 12%-14%, and the mixture is stirred in a mixer for 8-12 minutes to fully integrate the material and moisture, achieving a consistency where it "can be formed into a ball by hand but crumbles easily upon touch," avoiding interference with subsequent operations of the mini floating fish feed machine.

Extrusion Extrusion: Core Shaping and Nutritional Optimization. This step relies entirely on the fish floating feed extruder machine and is crucial for fish feed pellet production. Pre-treated raw materials are fed uniformly into the extrusion chamber of the extruder. The twin-screw extruder generates strong shear force through meshing rotation, and combined with steam heating, creates a high-temperature environment of 120-160℃ and a high-pressure environment of 3-6MPa within the chamber. The starch in the raw material rapidly gelatinizes, the protein denatures, and the moisture is converted into superheated steam. The pressure drops sharply the moment the material is extruded from the die, and the steam rapidly expands and escapes, creating a porous structure inside the pellet. Simultaneously, the cutter cuts the material into pellets of a set size (2-5mm), suitable for different sizes of fish. Compared to ordinary pellet mills, the high-temperature and high-pressure conditions of the floating feed making machine can kill more than 90% of harmful microorganisms, improving feed safety.

Post-processing: Ensuring stable quality. The extruded pellets must be immediately sent to a drying and cooling machine to dry to a moisture content of 10%-12% to prevent moisture absorption and mold growth. They are then cooled to room temperature to increase pellet hardness. After drying, qualified pellets are screened through a vibrating screen, and the broken pieces are returned to the raw material silo for secondary processing. Then, oil can be sprayed and powdered for seasoning as needed to improve palatability. Finally, after being checked for impurities with a metal detector, the product is sealed in packaging and labeled with nutritional information and shelf life, completing the entire production process. The entire process relies on a sinking fish feed extruder machine for precise temperature control to prevent nutrient loss or scorching of the feed particles due to high temperatures.

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