Cold press machine
Also known as screw pressing, this method feeds oil seeds through a screw-type machine. The specially designed screw shaft provides friction and continuous pressure to move and compress and rupture the seed material to release the oil, which seeps out through small slits in the ruggedly designed casing, or barrel while pressing the seeds into a hardened “cake”. Cold-pressing cannot extract all of the oil from a seed, and a significant amount remains trapped inside the cake.