Figure 4 – R-type flat die pellet mill 4.1.2 Die-rotating flat die pellet mill In a die-rotating type or D-type, the rollers are stationary and the flat die is rotating as shown in Figure 5. Figure 5 – D-type flat die pellet mill 4.2 Ring die pellet mill In a ring die pellet mill as shown in Figure 6, feed formula is fed and distributed over