The principle of oil press

(1), a high oil content of peanut crop, its internal fat in spherical or particulate oil refinery in the cell membrane by a layer of closed, surrounded by the outside world in the extrusion process, this film and the wall with rupture, peanut oil out of the fracture begins; in the extrusion process, the extrusion portion of oil processing, peanut becomes brittle and hard, lose their elasticity; the peanut skin contain more fiber, the applied pressure after separated from the surface with peanuts, peanut skin so easy to fall off; in the extrusion process, peanuts and not by the shear stress, so no broken kernel phenomenon, it is easy to restore the status quo;
(2), according to the fat content requirements, different pressures are applied. Defatted peanuts obtained different results.