The reasons for the pellet mill causing loose pellets?

Posted by allenlu on March 9th, 2020

The poultry feed pellet mill(ciclk to see sunwit feed machinery) is one of the key machines in feed production line. It takes corn, barley, wheat, maize,cereal, grain, coarse fiber as asraw material.The pellets have the advantages of balanced nutrition, easy digestion and easy storage.

Sometimes, loose or not forming phenomenon would appear when using feed pellet mill, then what is the reason for that?How to avoid producing loose feed pellets?

We mainly consider it from the following 3 aspects：

1.The Characteristic of raw material
The texture of some raw material is relatively soft, which is easy to make pellets. While some is hard or in powder,which is difficult to shape.

Besides, the moisture of raw material is also a main factor of unshaped pellets. The moisture of raw material is better to be kept between 8%-15%. Higher or lower moisture will make it difficult to shape pellets.

Keep good control of crude fiber content of material. Appropriate crude fiber content is beneficial for pellets to bond and will reduce pulverulent ratio, improve pelleting output.

But when crude fiber content exceeds a certain rate, it will affect pellets’ hardness and shaping rate because of low cohesiveness.

2.The compression ratio of ring die feed pellet machine
The compression ratio of ring die means the ratio of effective working length and die holes´diameter. We need to choose suitable compression ratio according to raw material formula and product requirement.

Low compression ratio can increase output and reduce energy consumption, but in that case, the pellets produced are loose with varying length and high pulverulent ratio；on the contrary, pellets would be solid with smooth,glossy surface and low pulverulent ratio, while the cost is high under this circumstances.

3.The gap between press roller and ring die
If the gap between press roller and die is too wide, the pressure is not enough which will cause poor quality of pellet forming. So, clients should strictly follow feed pellet mill manufacturer’s instruction to adjust gap between press roller and die.