Round Die Pellet Machines for Sale

Material is fed from a surge bin through a variable-speed conditioner above the pellet machine; the conditioned material is then fed into the door of the pellet machine. A screw auger then feeds material into the centre of the pellet machine chamber. Inside the chamber, the rollers are stationary and the die is driven, similar to a washing machine. Once in the chamber the material is taken up by the rotating die and then compressed by the rollers. 

 

 

Firstly, round die pellet machines do not suffer uneven roller and die wear as the inner and outer edge of the roller covers the same distance. For this reason round die pellet machines are preferred for large-scale production as the costs of roller and die consumables are perceived to be lower. Round die pellet machines are also preferred for large-scale production as they are considered more energy efficient. In flat die pellet machines, roller slip causes extra friction during the pelleting process, which uses more energy during production. However, this extra friction is not totally a bad thing, as more friction results in more heat, which can produce better pellets. All round die pellet machines come complete with a conditioner and variable-speed feeding.

 

The first obvious disadvantage of the round die pellet machine is its size and weight. This may not be a problem for large-scale production. However, for small-scale production this can be a major problem. Moreover, changing rollers and dies in a round die pellet machine is a far more labor-intensive process. The dies particularly are very large and heavy and in most cases lifting equipment is required to remove or replace the die. Furthermore, roller adjustment is more difficult, as the majority of round die pellet machines require manual roller adjustment, which can only be accessed by opening the pellet mill chamber. However, this is not always the case, as some now come with optional remote roller adjustment at extra cost. Cost is another key disadvantage of the round die pellet machines, as the machines themselves and the dies and rollers are generally more expensive than flat die pellet machines. Finally, visibility of the pellet process, as the die and roller are encased behind a solid door, viewing the process to gain information on possible issues and correction is impossible.