Die Body

The die body, also known as the pellet die or ring die, is a precision-engineered cylindrical component in a high-efficiency feed pellet mill. It contains an array of precisely machined holes (die holes) through which feed mash is forced under high pressure by rotating rollers. This process compresses the material, generating heat and binding it into dense, uniform cylindrical pellets. The die body's design directly determines pellet size, shape, density, and production throughput. It is a critical wear part subject to extreme mechanical stress, abrasion, and thermal cycling.

The die body operates on the principle of extrusion and compaction. Feed material (mash) is fed into the gap between the rotating die body and stationary (or counter-rotating) rollers. The rollers press the material against the inner surface of the die body, forcing it through the tapered die holes. Friction and pressure within the holes generate heat (typically 70-90°C), which plasticizes natural binders (like starch) in the feed, causing the material to bind together. The extruded strands are cut to length by external knives to form pellets.