When operating, the good processed oil material into the pressing chamber from hopper, and the screw rotate to push-in the material for squeezing. For the material is conducted in the motion state, under high pressure of chamber, the material, screw, and chamber have a great friction resistance, which resulting in relative motion.
On the other hand, due to the screw diameter is gradually thickening, the screw pitch is gradually declining, so when the screw rotating, the thread can move the embryo forward, also an flip them outward, at the same time the material close to the screw can rotate with the thread. So every embryo is with different speed and direction moving, with the moving between embryo, all the friction generate heat satisfy the needs of oil process operation, helps to denaturation embryo protein, destroys the colloid, increases the plasticity, also reduces the viscosity and easy to precipitate oil. Thus increasing the yield efficiency.