The shell of press rollers is made of wear-resistant alloy by metal machining and heat treatment.

The roller shell face patterns shall have a certain effect on the pelletizing performance.

Muyang mainly manufactures roller shells with four kinds of face patterns: dimpled roller shell, a roller shell with open-ended corrugations, a roller shell with closed-end corrugations and a roller shell with helical corrugations.

The dimpled pattern and open-ended corrugation pattern are mainly used for pelletizing feeds for livestock and poultry.

The dimpled roller features uniform wearing of ring die, but poor material traction.

The press roller with open-ended corrugations is good in material traction performance, widely used in feed machines; however, it brings about non-uniform wearing of the ring die.

The press roller with closed-end corrugations is mainly applicable for pelletizing feeds for aquatic animals, and the feedstuffs under processing are not apt to slip towards the two sides.