High Efficiency Feed Extruder Machine , Fish Food Extruder For Fish Farming

Product Specification

Wet type steam boiler floating fish feed extruder:

wet type floating fish feed extruder is different from dry type extruder. it requires a steam boiler to continuously provide steam to the conditioner. The floating fish pellets made by this wet type has better quality, and can float on the water surface for more than 24 hours. This wet type fish feed extruder can also be used to make sinking fish feed pellets and other kind of aquatic feed, or this fish feed machine can also be used as pet food machine to make pet food for cat, dog, etc.

The raw material required: Raw materials:  maize (corn), soybean oil meal/cake, rapeseed oil cake, wheat flour, barley flour, vitamins, mircoelements, fish powder, cassava, etc.

Fitness:  about 60-80mesh which were crushed and mixed

Moisture content:  about 20%-25%

Starch content:  ≥30%

Oil content: ≤10%

Steam boiler floating fish feed pellet machine features:

1. Variably configurations of screw bolts are available for different formulas and raw materials.
2. Barrel and screw adopt alloy steel with heat treatment, having a long service life.
3. Cutting speed can be adjusted to cut the material into different length.
4. Molds can be changed to make fish feed pellets with diameter form 1.0 to 9mm.
5. Molds can be changed to produce different shapes of feed pellets.

6. Screw sleeve adopts jacketed construction, which can be injected in with hot steam or cooling water, thus the extruding temperature can be controlled effectively.
7. The conditioner can make the materials have fully gelatinization of starch by a combination of hot steam and mechanical shear/mixing. The materials may remain in the conditioner for a time over 180s.

Main parameters:

Structures of the fish feed extruder:

1. Feeder: it is to ensure the uniform and stable feeding, and adjust the feeding quantity according to the rated current value of the extrusion motor. Generally it uses electromagnetic speed motor or frequency converter to control speed and change material feeding quantity. The outlet of the feeding hopper is usually fed by the spiral dragline to the extruded section.

2. Extruding chamber: it consists of a screw, a barrel, a template, a clamp and so on. The screw, and barrel are piecewise combined, so the degree of compression can be adjusted in accordance with the type and requirements of extruded feed, in order to change the expansion of the extruded feed.

3. The expansion mechanism is divided into 3 segments according to its function and position:

Feeding section: in this section the screw pitch is large, so it mainly transports and compresses materials, so that the spiral groove is filled with feed material.

Compression section: the slot of screw shallows along the material pushing direction and compresses the material.

Extrusion section: screw groove is more shallow, pitch gradually turns smaller, and the extrusion pressure reaches up to 3.0-10Mpa, the temperature can reach 120-150 degrees Celsius.

4. The outlet of extrusion section is a template, and the template shape can be designed into different die hole shapes according to the needs of different feeds. When the feed is extruded from die holes and enters the atmosphere, both its temperature and pressure drop, as a result the rapid expansion of the volume and rapid water evaporation dehydration solidify the feed into expanded fish feed or pet food.