The main function of the fish feed floating pellet making machine is to directly extrude puffed food. Usually, cereals, potatoes or beans are used as the main raw materials.
After being extruded by thefloating fish feed making machine, under the conditions of high temperature and high pressure, the product is puffed by using the pressure difference inside and outside the machine.
The direct extrusion type puffed food generally does not contain lead, and now the fish feed floating pellet making machine is widely used in the food industry. So how much do you know about the floating fish feed extruder? The fish feed floating pellet making machine has a pair of screws and a screw sleeve, which have the functions of mixing and kneading.
After the raw material enters the extruding cavity, the material is subjected to extrusion, friction and shearing between the screw sleeves, and the internal pressure continues to rise, up to 4Mpa, and the temperature continues to rise, up to 140℃.
Within 3-7s, the temperature and pressure of fish feed floating pellet making machine rise sharply, and the tissue structure of the material changes, which further gelatinizes the starch, denatures the protein, destroys the crude fiber, and kills harmful bacteria such as Salmonella.
The high-temperature and high-pressure material comes out of the discharge port, and its pressure is suddenly released in an instant, and the moisture is partially flashed.
1. The structure of floating pellet making machine
The feeder is to ensure uniform and stable feeding, and adjust the feeding amount according to the rated current value of the motor of fish feed floating pellet making machine. Generally, an electromagnetic speed-regulating motor or a frequency converter is used to adjust the speed, and the feeding amount of the feeder is changed.
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Expansion cavity of fish feed floating pellet making machine is composed of screw, screw sleeve, template, card bone and so on. The screw and screw sleeve are combined in sections, the compression degree can be adjusted according to the type and requirements of the extruded feed, and the extruded degree of the extruded feed can be changed;
The fish feed floating pellet making machine is divided into three sections in terms of collapse degree according to function and position:
①Feeding section: This section of floating fish feed machine has a large screw pitch, and mainly conveys and compresses the material so that the material fills the spiral groove;
②Compression section: The screw groove of this section changes from deep to shallow along the material moving direction to compress the material;
③Extrusion section: the screw groove is shallower, the pitch gradually becomes smaller, the extrusion force can reach 3.0-10Mpa, and the temperature can reach 120-150 degrees Celsius. This section has the highest pressure and highest temperature, so the wear of the screw and screw sleeve is also the most serious.
The outlet of the extrusion section is a template, the shape of the template is designed with different die holes according to the needs of different feeds, the material is extruded from the die hole of the template and enters the atmosphere, the pressure and temperature drop sharply, and its volume expands rapidly, the water quickly evaporates, dehydrates and solidifies to become an extruded material.
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2. Operating procedures of floating fish feed machine
(1) Precautions before starting and after stopping
- Check all parts of fish feed floating pellet making machine, especially the connecting screws and anchor bolts of each section of the puffing chamber, the connecting bolts between the motor base and the frame, and the bolt connection between the puffing chamber and the frame, and there must be no looseness;
- Manually rotate the main shaft, at this time, there should be no rubbing sound in the fish feed floating pellet making machine puffing cavity;
- Start the feeding auger of fish feed floating pellet making machine, check its stepless high-speed performance, and require normal operation;
- Check and clean the water and gas paths before starting the fish feed floating pellet making machine, and all filters need to be cleaned;
- Before starting the fish feed floating pellet making machine, check whether the wiring of the electric control part is correct, whether the rotation of each motor is correct, and whether the control is reliable;
- After the fish feed floating pellet making machine is stopped, you must wear high-temperature gloves, quickly remove the discharge mold, and immediately clean it while it is hot, and start the main motor to empty the material accumulated in the puffing cavity. When the corn is puffed, soybean powder should be added The material is rinsed clean;
- Pay attention to safety when unloading the machine, and do not stand in front of the machine to avoid danger caused by residual pressure in the fish feed floating pellet making machine cavity;
- After the fish feed floating pellet making machine is running normally, it shall not be shut down at will.
(2) Power on
- Before starting the fish feed floating pellet making machine, check the fasteners, and there must be no looseness;
- Ensure the normal supply of steam and water;
- Ensure that the power supply and electrical appliances are normal;
- Open the steam valve, preheat the floating fish pellet machine puffing chamber, the temperature is about 100 degrees;
- Start the fish feed floating pellet making machine: start the conditioner, start the feeding auger, when there is material flowing out from the outlet of the conditioner, start adding steam to the conditioner.
A small amount of water is added, and the material is fed into the puffing cavity at the same time. After the material is extruded by fish feed floating pellet making machine, the puffing effect and moisture of the product are adjusted.
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After the fish feed floating pellet making machine production comes to an end, it needs to be stopped. The stop sequence is: feeding auger and conditioner. Then wait until the indicated value of the main engine current on the electric control cabinet becomes the no-load current value, then stop the main motor and the oil pump motor.
(When the corn is puffed, about 25 kg of soybeans should be fed into the bypass feeding port of the first section of the puffing cavity. To clean the residual corn material in the puffing cavity, and then stop the main motor to prevent the fish feed floating pellet making machine from blocking), then quickly disassemble the puffing cavity of the tail section for cleaning.
After cleaning, apply grease to the inner wall of the main shaft and screw head ( After feeding grease), re-install it and wait for the next boot;
When you see that the material level indicator on the silo indicates that the material level has reached the lowest level, start to prepare for shutdown. At this time, do not stop the feeding auger and conditioner, and stop feeding when the main fish feed floating pellet making machine current drops to the no-load current auger and conditioner.
3. Operation sequence of floating fish feed machine
1.When puffing soybeans, the two sections at the inlet end of the puffing cavity are single screw heads, and the three sections at the outlet end are equipped with double screw heads.
First, add steam to the jacket to preheat the puffing cavity to about 100 degrees, and put the screws on the puffing cavity at the tail section. After the plug is tightened, loosen it for 3-4 turns, and then tighten the screw plug to fix the screw plug before feeding.
By controlling the stepless high-speed mechanism of the feeding auger, the feeding speed is from slow to fast, and the feeding speed is from small to large. After the soybean meal is ejected from the screw plug hole, add the cover to enter the normal production, and configure the screw plugs with different apertures to obtain soybean meal with different yields and finenesses.
By configuring the conical pressure rings of different diameters, the indicated temperature of the four-section (discharge end) puffing cavity is 130-140 degrees. It is recommended that the sieve of the crusher used for crushing soybeans should have a diameter of 3-4.
2.When extruding powdery feed by fish feed floating pellet making machine, the extruding screws in the extruding cavity are all single screw heads, add steam to the jacket to preheat the puffing cavity to about 80 degrees, and enter the fish feed floating pellet making machine and steam uniformly quenched and tempered powder.
About 18%, this must be done in the feed conditioner, and the feed amount is controlled by the stepless speed regulating mechanism from small to large. Note that the reading of the ammeter of the main motor should not exceed the rated current of the main engine of fish feed floating pellet making machine.
Beware of overloading the motor and extruding powdery materials. When the temperature of the extruding chamber at the discharge end is controlled to an appropriate degree by configuring conical pressure rings with different diameters.
4. Repair of fish feed floating pellet making machine
- Turn the fish feed floating pellet making machine on-site control switch to the stop state during maintenance;
- The inside and outside of the fish feed floating pellet making machine should be cleaned after each shift, especially the material should not be retained in the puffing chamber, so as to avoid it being difficult to clean up after cooling and agglomeration;
- The large pulley of the main shaft of the puffing chamber should be cleaned frequently, and not too much dust, otherwise the pulley will be unbalanced and the puffing chamber will vibrate;
- The main bearing of the expansion chamber is lubricated with lubricating oil, and the bearing of the fish feed floating pellet making machine conditioner and its transmission device and other bearing parts are lubricated with grease;
- The main bearing must be replaced with new oil regularly. After 250 hours of work, all new oil must be replaced;
- Other bearing parts, every 48 hours of work, grease is injected once;
- The chain transmission mechanism on the steam conditioner should be lubricated frequently;
- The oil in the reducer of fish feed floating pellet making machine should be controlled at the calibrated oil level, and the new oil should be replaced after 250 hours of operation;
- When removing the screw head, do not knock it hard;
- Always keep the fish feed floating pellet making machine and its surroundings clean.
The above is the principle, structure and operating procedures of the fish feed floating pellet making machine introduced by Richi Machinery. In pursuit of crispy taste and good appearance, manufacturers often add a leavening agent (or baking powder), which contains a certain amount of aluminum elements, and generates gas when heated during baking or frying, and the leavening agent is inside the food.