... ,such as single feeding, twin screw.hollow screw,forced-feeding,sidefeeding,liquid-adding system6.ScrewThe screw elements and kneading blocks are ... self-cleaning,transmission, compounding,press-forming,etc. The screw is made of high tool steel 38CrMoALA or W6Mo5Cr4V2 ... high wear-resistant functions Brazil colombia 180mm screw barrel recycled film 180mm screw barrel material PP PE plast granulator ...