What is the structure of a single screw floating fish feed machine? - Knowledge

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Core transmission components: Screw and drive motor. The screw is the "heart" of the single screw floating fish feed extruder machine, directly determining the material processing effect. It is typically made of 38CrMoAl alloy, with a surface hardness of HRC60 or higher after nitriding treatment, offering strong wear resistance and a service life of 1500-2000 hours. The screw's structural design is highly targeted, with the screw groove depth gradually decreasing from the feeding section to the discharge section (deeper in the feeding section, shallower in the compression section, and shallowest in the metering section), achieving gradient compression and melting of the raw materials. The helix angle is variable, with a large angle in the feeding section improving conveying efficiency, and a small angle in the compression and metering sections enhancing the extrusion effect. The drive motor provides power for the screw rotation, with power selected according to production capacity (15-55kW). It is usually equipped with a variable frequency speed control system, allowing precise control of material residence time and expansion intensity by adjusting the speed.

Material processing components: Extrusion chamber and die head. The extrusion chamber and screw of the single screw fish feed processing machine form a closed material processing space. The inner wall is lined with wear-resistant bushings that can be replaced individually, reducing maintenance costs. Temperature control of the extrusion chamber directly affects the puffing effect. Some models are equipped with external heating/cooling devices to assist in regulating the temperature within the chamber and ensure stable raw material melting. The die head is a key component in feed forming. By changing the die head with different apertures (1-5mm) and shapes, feed pellets of different specifications and shapes (such as cylindrical and flake shapes) can be produced. The throttling structure inside the die head can increase the extrusion pressure and ensure the puffing effect. For example, a 1mm small aperture die head is used when producing starter feed for fish fry; a 3-4mm large aperture die head is used when producing feed for adult fish.

Auxiliary functional components: feeding device and cutting device. The feeding device adopts a spiral or vibrating feeding design to ensure that the raw material enters the extrusion chamber continuously and evenly, avoiding pressure fluctuations caused by feeding interruptions, which affect the puffing effect; some feeding devices are equipped with raw material pretreatment functions, such as preliminary crushing and mixing. The cutting device is installed on the outside of the die head. High-speed rotating blades cut the expanded material into particles of a preset length. The cutting speed can be adjusted in conjunction with the screw speed to ensure uniform particle length (error ≤ ±0.5mm). In addition, the equipment is equipped with safety protection devices (such as protective covers and emergency stop buttons) and pressure and temperature monitoring devices to ensure safe and stable production.

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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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