What are the Types of Fish Feed Machine

What is fish feed extruder?

Fish feed extruder machine, according to the different production process is divided into dry fish feed machine and wet fish feed machine. The main structure of the feed puffing machine consists of feeder, conditioner, pellet generator and conveying equipment.

Aquatic fish feed pellet machine is already mixed powder feed by extrusion once formed, and then the granulation process does not need to add water, no drying, by natural heating up to about 70 degrees, can make starch paste, deep internal maturation of particles, particles hard and smooth molding rate of 98%, long-term storage. What’s more, the granulating equipment can also effectively kill Salmonella and reduce animal morbidity. It is the ideal choice for aquaculture farmers and small, medium and large feed processing plants.

Dry type fish feed machine

Floating Fish Feed Machine
Dry Type Fish Feed Making Machine For Sale

The dry type fish feed extruder is used primarily for making aquatic feed such as fish feed pellets and catfish feed pellets. The heating plate of the dry-type fish feed machine heats the pellet feed at high temperatures.

Because they are puffed, the granules will float in the water for approximately 24 hours. The finished particle sizes are 0.9mm to 1.5mm to 2mm, 2.5mm to 3mm, 3mm to 4mm, 3.5mm to 4.5mm to 6mm and then puffed up to a maximum of 15mm. Dry type machine that heats the material using an electric heating plate. This dry type machine extrudes material from the die holes under the action by the screw extruder. The machine releases the pellets and then the temperature and pressure drop dramatically. This causes the water to evaporate. The material is then expanded to form porous particles. The moisture content can range from 15% to 20% during this process.

Wet type fish feed machine

Sinking Fish Feed Machine
Wet Type Fish Feed Making Machine For Sale

The wet type fish feed extruder is widely used to make high-quality floating aquatic feed pellets. It is suitable for catfish, fish, shrimp, crabs, cats, dogs, and other pets. Wet type fish feed machines can be used to make raw materials such as wheat, soybean, cWetake, and other scraps. The puffed particles that are produced by the fish feed extruder machine will float on the surface of the water for up to 24 hours without settling.

These machines are mainly used in large and medium-sized feed processing facilities and farms. It works in conjunction with the steam boiler. The boiler can continuously supply hot steam to extrude the wet type fish-feed machine extrusion section. The wet type machine works in the same way as the dry type fish feed extruder machine. The wet type machine requires water or steam to raise the moisture level to twenty percent or more during processing. The steam raises the material’s temperature.

Dry Type Vs Wet Type Fish Feed Extruder, What’s The Difference?

Dry pellet making machine without steam conditioner, the raw material into the extrusion system before the pellet machine without pre-conditioning. Wet pellet machine with steam conditioner, raw materials into the extrusion system before the pre-conditioned pellet machine.

From the definition can be seen, the most important difference between the wet and dry method is whether the material enters the extrusion by steam pre-conditioning. I have always understood the wet and dry method as the two modes of operation of the puffing machine, rather than the essential difference in structure. From the work mode, according to whether the material into the puffing machine before the puffing chamber by steam conditioning is divided into dry puffing machine and wet puffing machine. If the steam conditioning, it is the wet working mode, and vice versa for the dry method.

The purpose of steam conditioning: to raise the material temperature, softening and part of the material to ripening, supplementing a certain amount of water. For the vast majority of materials, wet expansion are more efficient than dry expansion to consider only the temperature factor to do a simple analysis, if the material is expected to ripening temperature of 130 ℃, dry expansion screw extrusion part from room temperature (20 ℃) to raise the value of 110 ℃, if the wet production, tempering temperature of 80 ℃, the screw extrusion part of the material temperature needs to be raised to 50 ℃, therefore, the mechanical energy required Less than the dry method, more energy can be used to increase the output. In addition, due to the softening of the material, the wear and tear on the screw and barrel is reduced.

Many users take it literally and think that adding water is the wet method. Through the above brief analysis, we can know that the simple addition of water can not be called the wet method, but only part of the water supplement, but not to enhance the material temperature, softening and part of the role of maturation of the material.

As the dry / wet method of production of the two conditions of the material into the barrel of the different nature, the wet method into the barrel is wet and hot soft materials, dry method into the barrel is cold hard materials, therefore, the spindle system and extrusion screw configuration requirements are also different.

Generally, the dry machine with steam conditioning system can be wet production, the efficiency will improve, but not as high as the special wet model; wet model dry production to consider the impact of raw and hard materials on the shaft system, for some materials can be dry production, but the efficiency will be reduced, for some materials are not applicable. In other words, the dry machine can be produced wet, while the wet machine is not necessarily used dry.

We Also Have Diesel Engine Type Fish Feed Machine

Diesel Engine Fish Feed Machine
Diesel Engine Fish Feed Pellet Machine for Sale

The diesel engine fish feed extruder drives on a diesel engine. The granulation work can also be done from anywhere, so there is no need for electricity. This solves the problem of electricity being inconvenient. The three-phase power is not required, but the power output is.

The factory offers a range of die plates with apertures ranging from 0.9-15mm that can extrude more then 30 types of common feed pellets. It can handle between 30 and 2 tons of feed pellets per hour.

We also offer the highest compression ratio for the die plate so that every particle you make is uniform, smooth, and glossy. This machine has a scientific and rational structural design. It is low in floor area, low noise, high output, and low energy consumption. The particles are molded at a high rate and the surface is clear and bright, making them easy to store and transport.

Fish feed production line and manufacturing process

300-500Kg/H Fish Feed Making Plant For Sale

A complete fish feed production plant includes a hammer mill and crusher, mixer, dryer, cooler, dryer, and other equipment. This equipment uses corn, forage, molasses, and other grains to make high-quality, highly nutritious fish feed.

In the fish feed production process, second grinding and second batching are generally used to mix. Then, extrusion -> drying -> external spraying cooling -> crumbling -> screening is used to complete the process of aquatic extruded food production.

Cleaning and primary coarse grinding

After the material has passed through the feeding pit the hoist moves into the cleaning equipment to remove any impurities. The hoist then goes into the bin to be crushed. The coarse crushing is completed. After that, the material passes through the hoist. Finally, the distributor enters into the bin to be part of the first batch. The pretreatment of superfine grinding in aquafeed production is primary coarse grinding. Its primary purpose is to reduce material variation and size differences.

Mixing and first batching

Preparation of raw materials is the first ingredient. This is mostly completed using an electronic batching scale.

Second grinding and batching

Aquafeed grinding must be reduced in size due to the low food intake, poor digestion and short digestive tracts of aquatic animals. The second blending bin has a material fineness above 60 mesh and a low density. The mixer has an adding machine that is used primarily for the addition and removal of additives.

Extruding & pelleting

The material goes through a high-temperature, high humidity, and high pressure cooking process during extrusion. This results in the formation of extruded feed average humidity in (25-30%) The dryer dries the pellets and water drops to 13%.


The hoist lifts the cooled material and screens it. Next, weigh and pack.

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