Single screw extruder is a device that achieves the transformation (Gelatinierung, sterilization, extrusion) of the physical and chemical properties of materials (such as grains, beans, Fischmahlzeit, usw.) and molding through the synergistic effect of mechanical extrusion, shearing and external heating generated by the rotation of the screw. It is widely used in feed, Essen, aquatic products and other industries. It is the core processing equipment connecting raw material processing and finished product production.
The single screw extruder is a special equipment that uses the relative movement of the screw and the barrel to transport, compress, mischen, heat, gelatinize and expand materials. Its core function is to transform solid raw materials (Granulat, Pulver, usw.) into products with specific shapes, densities and tastes through high temperature and high pressure treatment, while achieving added value such as sterilization and improved digestibility.
| Modell | diameter（mm） | Output（kg/h） | Screw length (aspect ratio) | Power（KW） | Maximum speed（rpm） |
| TTD20 | 20 | 5-10 | 8-32 | 3 | 93 |
| TTD65 | 65 | 80-100 | 8-32 | 30 | 93 |
| TTD120 | 120 | 500-600 | 8-32 | 160 | 93 |
| TTD150 | 150 | 700-900 | 8-32 | 200 | 93 |
| TTD180 | 180 | 800-1300 | 8-32 | 280 | 93 |
| TTD200 | 200 | 1200-1500 | 8-32 | 355 | 93 |
| TTD240 | 240 | 1500-2000 | 8-32 | 455 | 93 |
| TTD300 | 300 | 2500-3000 | 8-32 | 600 | 70 |
| TTD400 | 400 | 4000-5000 | 8-32 | 1000 | 70 |
| TTD500 | 500 | 5000-7000 | 8-32 | 1300 | 70 |
Feed industry: production of pellet feed for livestock and poultry (pigs, Hühner), floating/sinking feed for aquatic products (fish, shrimp, crabs), improving the digestibility and absorption rate of feed, and reducing waste in breeding.
Pet food industry: making dog food, Katzenfutter, usw., mixing and puffing raw materials such as meat, grains, and vegetables to form diversified shapes (such as bone shape, particle shape) to improve taste
Food industry: processing leisure puffed foods (such as potato chips, rice cakes), breakfast cereals (cheese rings, oatmeal bars), vegetarian protein snacks (soy protein puffed bars), usw.
Aquatic industry: production of pellet feed for aquatic animals such as fish, shrimp, and crabs. The density of the puffed feed is controllable (floating or sinking), and the stability in water is good, reducing pollution.
Biomass fuel: puffing and compressing agricultural and forestry waste such as straw, wood chips, and rice husks to make high-density pellet fuel, the combustion efficiency is higher than the original biomass, and the transportation cost is reduced.
The core structure of a single screw extruder consists of 5 key systems, and each part works together to complete the whole process of material processing:
1. Fütterungssystem
Composition: including storage hopper (receiving raw materials transported from upstream), quantitative feeder (such as screw feeder, vibrating feeder), feed port, usw.
2. Extrusion system (core component)
Composition: The extrusion extruder is the core part of the extruder
The extrusion extruder can be divided into two parts: cavity combination and drive component combination.
Cavity combination: mainly composed of feed box, compression chamber, discharge box (no such part for annular gap discharge), adjusting screw plug (for extruding full-fat soybeans or other single raw materials), usw.
Drive component combination: mainly composed of bearing box assembly, main shaft, extrusion screw (group), bullet head, usw.
3. Heating/cooling system
Composition: heating device (electric heating ring, steam jacket) outside the barrel, cooling device (water cooling jacket, equipped with some models) and temperature sensor.
4. Übertragungssystem
Composition: including motor, Reduzierer, coupling, usw.
5. Discharging and molding system
Composition: including mold (molding part at the end of the barrel, with holes of specific shapes, such as round, strip, sheet), cutter (installed on the outside of the mold, driven by the motor to rotate), discharging port, usw.
Start-up
1. Turn on the main motor and check whether the machine is running and turning normally.
2. Turn on the cutting motor and adjust the distance between the cutter and the mold.
3. Pour a small amount of clean water into the machine feed port and put a small amount of the mixed material into the feed port.
4. Wait for the material to be squeezed out of the machine outlet and increase the discharge speed slightly.
5. Turn on the feeder and gradually increase the discharge speed as the machine temperature rises.
6. Check whether the material extruded by the machine is cut evenly. If the cutting is uneven, adjust the distance between the cutter and the mold slightly.
Stop
1. Stop feeding and turn off the automatic feeder.
2. After all the materials in the extruder are squeezed out, turn off the cutter power and shake the cutter workbench out of the cutting range.
3. Turn off the main power of the machine.
4. Take off the cutter passport, pull out the workbench shaft, and swing it to one side.
5. Quickly remove the machine head. During disassembly, no one is allowed to stand in front of the machine head to avoid being burned by the steam in the machine.
6. Turn on the machine and let it idle for about 1 minute, and wait for the machine to expand and squeeze out all the materials in the choke.
7. Turn off the main power of the machine.
Cleaning
1. Pull out the screw and clean the remaining materials in the screw, machine head and mold.
2. Reinstall it for next use.
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