Basic introduction of oil press

An oil press refers to a machine that uses mechanical external force to increase the temperature, activate oil molecules, and squeeze oil from the oil. It can be divided into household oil press, hydraulic oil press, spiral oil press, new hydraulic oil press, high-efficiency fine filtration oil press, and fully automatic oil press.
The raw materials for oil presses, which are oil crops, are divided into plant materials and animal materials according to their types. In the general production process, we mainly use plant materials. And plant materials are divided into legume, seed, and hemp families.
principle
(1) Peanuts are a crop with a high oil content, and their internal oil exists in spherical or granular form inside the cells, surrounded by a closed film. During the process of external compression, this film and the cell wall rupture together, and peanut oil flows out from the cracks; During the squeezing process, the oil in peanuts is partially squeezed out, making them brittle and hard, losing their original elasticity; The peanut red coat contains more fiber, and after applying pressure, it separates from the surface of the peanut, making it easy for the peanut red coat to fall off; During the squeezing process, peanuts are subjected to pressure rather than shear force, so there is no crushing phenomenon and they are easily restored to their original state;
(2) Apply different pressures according to the requirements of fat content. Different effects of defatted peanuts can be obtained.
workmanship
Process requirements: Peanut defatting rate of over 50%; Peanuts are intact without any broken particles, there is no adhesion between peanuts, and the peanut red coat is easy to fall off. The important factor affecting the degreasing effect is moisture, and the secondary factor is time. The optimal conditions for achieving the best degreasing effect are 4.52% -7.26%. (Excessive moisture affects the oil yield, and excessive moisture can easily cause high Watson breakage rate.)
Conclusion
Under certain effective conditions such as pressure, moisture, temperature, and time, peanuts can be pressed into peanut kernels using a hydraulic oil press to obtain peanut oil with apricot yellow color, original flavor, fragrant aroma, and pure taste, as well as peanuts with different defatting effects.