... to pelletize.5.Macroporous die, wire joining circular tube, increasing travel, improving density.6.Ring die,vertical structure,good for ... four-fold capacity. No flat die, ring die can do this. 4. Macroporous die, wire joining circular tube, increasing travel, improving ... the length of circular tube). Normally ring die pellet mills die is rotating,can not wire joining circular tube, to pelletize ...