Screw Oil Press Machine is a kind of equipment that uses the principle of mechanical extrusion to extract oil from various oil-bearing materials, and is widely used in the processing and production of soybean, peanut, rapeseed, sesame, sunflower seed, cottonseed, tea seed and other oil crops. Due to its continuous operation, high oil yield, and wide applicability, spiral oil press has become one of the commonly used equipment in edible oil processing plants, agricultural cooperatives, and small and medium-sized oil pressing enterprises.
Basic working principle
The core component of a spiral oil press is the spiral shaft (also known as the press screw). When the equipment is running, the motor drives the screw shaft to continuously rotate through the reduction mechanism, continuously conveying the oil entering the squeezing chamber forward.
As the material advances, the internal space of the squeezing chamber gradually shrinks, and the pressure exerted by the spiral shaft on the oil material continues to increase. Under high pressure, the oil cells are destroyed, and the internal oil is squeezed out and flows out through the gaps between the strips, collecting in the oil receiving tank.
After oil extraction, the solid residue (oil cake) is continuously discharged from the rear of the machine, enabling fully continuous production throughout the oil pressing process.
The main components of a spiral oil press
A standard spiral oil press typically consists of the following parts:
Feeding hopper;Spiral shaft (squeezing screw);Squeezing chamber (squeezing cage);Gearbox and transmission system;electric motor;
oil catch tray;Cake outlet;electric control system
Each component works together to complete processes such as material conveying, pressurization, oil pressing, and slag discharge.
Detailed explanation of oil extraction process
1. Raw material deployment
After cleaning and screening, the oil enters the equipment from the feeding hopper. According to the characteristics of different raw materials, some oilseeds also need to undergo pretreatment such as shelling, crushing, steaming and frying, or tempering to improve oil extraction efficiency and yield.
2. Conveying and Pressing
After entering the squeezing chamber, the spiral shaft continuously rotates, pushing the oil forward. Due to the gradual decrease in spiral pitch and the shrinking of the squeezing chamber space, the oil is subjected to increasing mechanical pressure.
3. Oil and Fat Separation
As the pressure continues to increase, the internal cell structure of the oil is destroyed, and the oil is squeezed out and flows out through the gaps in the squeezing chamber, achieving oil residue separation.
4. Youbing (Deep-fried round and flat dough-cake) discharge
When most of the grease in the oil is extracted, the remaining solid residue forms Youbing (Deep-fried round and flat dough-cake) and is discharged continuously from the tail of the equipment. By adjusting the cake discharge clearance, the thickness of Youbing (Deep-fried round and flat dough-cake) can be controlled to optimize the oil discharge rate and equipment operation status.
5. Collection and filtration of crude oil
The freshly squeezed oil usually contains a small amount of impurities and fine particles, which need to be filtered or further refined to obtain a clearer and higher quality finished oil.
The main factors affecting the oil pressing effect
The oil yield and production efficiency of a spiral oil press are influenced by various factors, including:
Is the moisture content of the raw material appropriate;Has the raw material undergone sufficient pretreatment;Is the temperature control for oil extraction reasonable;Spiral shaft structure design;Is the pressure regulation of the equipment correct;The oil content of the raw material itself
By reasonably controlling these factors, the oil yield can be effectively increased, the residual oil rate of Youbing (Deep-fried round and flat dough-cake) can be reduced, and the service life of the equipment can be extended.
The advantages of spiral oil press
Compared to traditional oil pressing methods, spiral oil presses have the following advantages:
It can achieve continuous production and improve production efficiency.
Mature mechanical structure, stable and reliable operation.
Suitable for various oil crops, with strong adaptability.
High degree of automation, reducing manual operations.
Higher oil yield and better economic benefits.
It can meet the production needs of small workshops, medium-sized enterprises, and large oil processing plants.
summary
Through continuous rotation of the screw shaft, the screw oil press exerts gradually increased mechanical pressure on the oil plants to separate the oil from the cells, and then discharges the oil through the barrel and Youbing (Deep-fried round and flat dough-cake) to achieve continuous oil production. With its high efficiency, stability, and wide applicability, the spiral oil press has become an important equipment in the modern vegetable oil processing industry.
For enterprises that wish to build edible oil processing production lines, a deep understanding of the working principle of spiral oil presses not only helps to correctly select equipment models, but also optimizes production processes, improves oil yield, reduces production costs, and ultimately enhances overall economic benefits.
