running to push the material into chamber. Owing to the sprial helical pitch of screws becomes shorter and the sprial depth of screw. Becomes shallower, in the chamber the volumes between screws and pressing ring inner is smaller, pressure produced from curve saw -tooth of pressing ring inner, which oil is separated out. Oil releases from the gaps between bars and oil slots between pressing rings. Cookie release from the cookie release state.
Specification of Oil Presser: