Working principle of the floating fish feed pellet machine

1. When the machine are extruding, the materials will be input from the opening end of the machines’ cavity, then will be transported into the entire cavity by the screws. Extrusion part is divided into several areas, place among every area has a ring part (pressure ring) as flow and pressure control. The screw conveying pressure driving the materials flow through the gap between pressure ring and inside of the cavity, Screw rotation movement of mechanical energy will be converted into heat energy by the friction between the material and extruding machine parts, and the friction between materials.

2. In most cases, the materials which are rich in starch and protein will be steamed into viscous dough or colloidal dough. In the process of this transformation, a lot of physical and chemical changes have taken place in the materials, in fact, it is mainly the result of the starch and protein in the materials changing.

3. Materials are squeezed, and flow through the mould holes (the mould is placed at the end of the extrusion chamber), viscous dough or colloidal dough will be processed into certain shapes. The screws inside of the machines’ cavity have a great thrust, thus make a huge pressure in the materials, when the materials come out from the mould holes, a mass of water in the materials are evaporated instantaneous. So the moisture content of the materials is reduced greatly.

4. When produce pellets with low density, it depends on the materials’ molecular composition, and conditions during extrusion operation, the materials will inflate a lot.

5. When produce pellets with high density, it depends on the pressure relief opening of the extrusion chamber, and conditions during extrusion operation, (such as increase the moisture content of the materials, decrease the extrusion temperature), the materials would not inflate a lot.

Structure of the floating fish feed pellet machine

Technical parameter of the floating fish feed pellet machine

Output pellets of floating fish feed pellet machine