The ring die operates by using pressure rollers to force materials (such as wood chips, animal feed, or mineral slag) through densely arranged die holes (with diameters ranging 2-30mm) on the ring die surface, thereby forming cylindrical pellets.
Uniform wear rates among all die holes, extended service life
Advantages
The forging process aligns the metal fibers continuously along the circumferential direction of the ring die, which corresponds perfectly with the primary radial extrusion forces exerted on the die holes. This metallurgical advantage effectively prevents edge chipping around the holes - a common failure mode in cast ring dies caused by internal porosity and voids. Statistical data show cast ring dies exhibit 2-3 times higher incidence of early-stage cracking compared to their forged counterparts due to these inherent structural defects.