How to stably produce qualified pellets with a fish feed extruder

 

 

When starting a fish feed extruder, following the correct sequence is crucial. First, connect the power supply to ensure the equipment is properly powered; this is like injecting "life" into the machine, providing it with the basic conditions for operation. Next, turn on the cooling system. The cooling system acts as a "heat dissipation guardian," effectively removing heat generated during operation, preventing damage from overheating, and extending the equipment's lifespan. Then, start the lubrication system to further provide good lubrication for all transmission components, reducing friction between parts and ensuring smooth operation. Before starting the main motor, always adjust the screw speed to the lowest setting; this is a critical safety step. Starting the main motor at too high a speed may cause the motor to be subjected to excessive load instantly, leading to serious malfunctions such as motor burnout, and may also cause impact and damage to other components. After adjusting the screw speed to the lowest setting, slowly start the main motor, allowing it to gradually drive the screw and smoothly bring the equipment into operation.

 

After starting the main motor, the extruder needs to be preheated. Preheating ensures the barrel and screw reach the appropriate operating temperature, creating favorable conditions for subsequent material processing. Different types of extruders may have different preheating times and temperature requirements, so it is essential to strictly follow the equipment's instruction manual. Generally, the preheating time is around 15-30 minutes, and the preheating temperature needs to reach 80-120℃. During the preheating process, the temperature change can be monitored in real time through the equipment's temperature control system to ensure a uniform temperature rise and avoid localized overheating or undercooling. Once the extruder is preheated, feeding can begin. The pretreated material should be slowly and evenly added to the extruder's feed inlet, carefully controlling the feeding speed and amount. Feeding too quickly or too much may cause material to accumulate in the barrel, causing blockages and affecting the extrusion effect; feeding too slowly or too little will reduce production efficiency. During feeding, the feed amount can also be controlled by adjusting the speed or opening degree of the feeding device according to the actual situation, ensuring a continuous and stable flow of material into the extruder.

 

After entering the extruder, the material moves forward under the push of the screw, undergoing multiple actions including extrusion, shearing, friction, and heating. During this process, close monitoring of key parameters such as temperature and pressure is crucial, and adjustments must be made according to actual conditions. Temperature is a significant factor affecting feed quality, influencing the degree of starch gelatinization, protein denaturation, and the maturation effect of the material. Generally, the temperature of the extruder barrel is controlled between 100-180℃, with different temperatures set for different zones to meet the processing needs of the material at different stages. For example, the temperature in the feeding section can be relatively low, generally between 100-120℃, primarily for initial softening and conveying of the material; while in the melting and homogenizing sections, the temperature needs to be appropriately increased, generally between 140-180℃, to promote starch gelatinization and thorough mixing and homogenization of the material. The barrel temperature can be controlled by adjusting the power of the heating device or the flow rate of the cooling system.

 

Pressure is also a key parameter in the extrusion process, affecting the forming effect and particle density. The pressure inside an extruder is generally between 5 and 20 MPa. The pressure can be adjusted by changing the screw speed, die resistance, and feed rate. To increase pressure, the screw speed can be increased, the die orifice diameter reduced, or the feed rate increased; conversely, to decrease pressure, the screw speed can be decreased, the die orifice diameter increased, or the feed rate reduced. In practice, pressure parameters should be flexibly adjusted based on the feed formulation, pellet requirements, and equipment operating conditions to ensure the production of feed pellets that meet quality standards.

 

As the material is continuously advanced and processed within the extruder, it is ultimately shaped by the die. The die is a key component determining the shape and size of the feed pellets. Different species of farmed fish and their growth stages have different requirements for the shape and size of feed pellets. For example, juvenile fish typically require smaller feed pellets for easier swallowing and digestion, while adult fish can tolerate larger pellets. Common feed pellet shapes include round, cylindrical, and flat. Appropriate die shapes can be selected and replaced according to actual needs. When changing the die head, always stop the machine first and allow it to cool down before proceeding to ensure safety. Also, ensure the die head is securely installed and properly sealed to prevent material leakage.

 

Besides selecting a suitable die head, the length of the pellets can also be controlled by adjusting the position and speed of the cutter. The cutter position determines where the pellets are cut, while the cutter speed determines the cutting frequency. Generally, the faster the cutter speed, the shorter the pellets; the slower the cutter speed, the longer the pellets. In practice, the cutter position and speed can be flexibly adjusted according to the feed formula, pellet requirements, and equipment operating conditions to produce feed pellets that meet the requirements.

 

 

 

MIKIM boasts extensive experience in poultry feed pellet production lines, significantly reducing the incidence of poultry diseases. Its equipment is not only widely used across various industries domestically but also exported to Southeast Asia, Europe, Africa, and South America, earning a high reputation internationally. This global presence not only demonstrates the adaptability and competitiveness of its products, but also demonstrates the company's experience in adapting to diverse market standards and logistics conditions, enabling it to provide a stable supply chain for its overseas customers. Whether serving large domestic farms or cross-border feed companies, MIKIM can leverage its global service network to ensure a consistent, high-quality experience.

 

For more information on process flow design, equipment layout, factory construction plans, individual equipment pricing, or turnkey project proposals, please feel free to contact us!!!

 

 

 

1. What is the price of the fish feed pellet production line?

The price ranges from approximately $10,000-$36,000

2. Do you provide maintenance services for your customers?
Yes, we offer comprehensive after-sales maintenance services to our customers.

 

 

Contact now