What is the difference between a twin screw floating fish feed extruder and a single screw floating fish feed extruder machine?

The single-screw fish feed extruder has a relatively simple structure, with its core consisting of a screw with helical blades and a matching barrel. The screw is driven by a motor to rotate at high speed (typically 200-300 rpm). Its working principle is based on "gravity feeding + friction conveying." The raw material falls into the barrel from the feed inlet under its own weight and moves towards the discharge outlet under the push of the screw's helical blades. Simultaneously, the heating of the barrel's outer wall and the shearing action of the screw achieve plasticization and shaping of the raw material. This structure determines that the feeding speed of a single-screw extruder is unstable and easily affected by factors such as raw material particle size and moisture content. When the raw material moisture content is too low or the particle size is uneven, "bridging" and clogging are prone to occur.

 

The twin-screw fish pellet making machine uses two parallel screws. Depending on the meshing method, it can be divided into co-directional meshing and counter-directional meshing, with co-directional meshing being the main method used in feed production. Its structure is far more complex than that of a single-screw extruder, and in addition to the twin screws, it is also equipped with a forced feeding device and a segmented temperature control system. The working principle is based on "forced conveying + meshing shearing." The raw material is first evenly fed into the barrel by a forced feeding device. When the two screws rotate in the same direction, they mesh together, generating strong extrusion and shearing forces to thoroughly mix and plasticize the raw material. Simultaneously, a segmented temperature control system precisely controls the temperature of each section of the barrel, ensuring the raw material reaches its optimal state at different processing stages. This forced conveying method completely solves the feeding problem of single-screw extruders, maintaining stability even when processing high-fiber, low-moisture raw materials.

 

The structural differences also lie in the material requirements of core components. The screw of a single-screw fish feed pellet extruder only needs to withstand unidirectional pressure and can be made of ordinary alloy steel; the twin-screw extruder, due to its ability to withstand bidirectional meshing pressure and high-intensity shearing forces, requires wear-resistant alloy materials such as 38CrMoAlA, with a nitrided surface achieving a hardness of HV900 or higher, resulting in a service life 2-3 times longer than that of a single-screw extruder. Furthermore, the twin-screw barrel uses a modular design, allowing for the replacement of barrel sections of different lengths as needed, while single-screw barrels are mostly integral, offering less flexibility.

 

 

 

 

MIKIM's fish feed pellet production lines and supporting machinery offer excellent value for money. Not only are they affordable, eliminating middlemen markups and allowing small and medium-sized enterprises (SMEs) and fish farmers to purchase complete sets of equipment at reasonable costs, but they also boast exceptional efficiency. The fully automated process, from raw material crushing and precise ingredient mixing to extrusion pelleting and maturation, is completed in one continuous flow. This results in high starch gelatinization rates and uniform pellet formation, significantly improving production efficiency and feed quality, truly achieving "low cost, high output." Choosing a MIKIM fish feed pellet production line means enjoying comprehensive pre-sales and after-sales service, including 24-hour online customer support, a one-year warranty on the entire machine, professional on-site installation, commissioning, and maintenance, and a stable supply of spare parts. Customers can buy with confidence and use with peace of mind, with both excellent value and service quality!

 

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1. What is the price of the single screw fish feed pellet extruder?

The price ranges from approximately $3,500-$55,000

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

 

If you would like to learn more about MIKIM machinery, please contact us. We offer one-stop service and welcome your inquiries!!!

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