Working Principle:

When oil press is operating ,prepared materials enter the es-truding chamber from the hopper and then moves forwards by the rotating pressing screwed and is pressed .Under the high pressure will be created ,which also creates friction and relative movement amon material particles.

 On the other hand ,root diameter of the pressing screw varies larger from one end to the other hence ,when rotating ,it not only pushes paritcles moving but turns them outwards as well.Meanwhile particles adjacent the screw will rotate along with screw's rotating ,causing every particle insides the chamber to posses differernt speed.

Therefore ,relative movement among particles creates heat which is necessery duting manufacturing because of helping protein change properly ,damage col-loid ,increase plasticity ,decrease oil,elasticity ,resulting in high oil productivity.