Description

The Rectangular slot roller shell is one of the most widely used groove types among core pellet mill accessories. Its groove cross-section is rectangular, with vertical sidewalls, a flat bottom, and equal opening and bottom widths, offering a regular, simple, and efficient structure.

The key advantages of the Rectangular slot roller shell are as follows:

First, high machining precision and good groove consistency. The simple rectangular structure allows for high-precision machining using CNC grinding processes, with strong controllability over key parameters such as groove width tolerance and groove spacing uniformity, ensuring stable coordination between the roller and the ring die and smooth operation.

Second, high discharge efficiency and high output. The vertical sidewalls and flat bottom provide a clear axial flow channel for the material. During pressing, the material moves linearly along the groove without lateral deviation or retention, achieving discharge speeds among the highest of all groove types, making it suitable for large-scale continuous production.

Third, direct pressure transmission and uniform pellet density. The vertical sidewalls efficiently transmit radial pressure to the material, while the flat bottom ensures uniform force distribution, resulting in consistent pellet density and stable quality.

Fourth, easy cleaning and maintenance with minimal material retention. The rectangular groove has no dead corners, allowing residual material to be easily removed by air blowing or brushing, significantly reducing downtime for cleaning and improving equipment utilization.

Fifth, long wear life. The rectangular groove features uniform stress distribution with no sharp-corner stress concentration, offering longer service life than V-shaped grooves under the same material and heat treatment conditions.

In terms of material and process, high-quality Rectangular slot roller shells are made of high-alloy steel or carburized bearing steel (e.g., 20CrMnTi, GCr15) through forging, carburizing, overall quenching, and low-temperature tempering, with a working layer hardness of HRC58-62 and good core toughness. Suitable materials include corn, soybean meal, wood chips, and sawdust. Customization of inner hole, keyway, roller width, and groove parameters is available. Compatible with ring-die and flat-die pellet mills, fitting major brands such as CPM, Buhler, Zhengchang, and Muyang.

Inquiry Us