1. Vertical die, feeding vertically. Arching of raw materials, easy for heating dissipation. 2. Die fixed, rollers rotating, material centrifugal, evenly distributed around. 3. Double-layer dies, up and down duel-use, high capacity, saving energy. 4. Slient bearingsand imported heat and wear resistant fluorine rubber oil seals. 5. Independent lubrication, high pressure filtration, clean and unblocked.