Regulated material input into the pelletizer extruder is very important for many materials. During the production process of pelletizer moisture is released as steam. If the rate of material feed is greater than the productivity rate of the pelletizer extruder, this can cause problems. If the steam generated from the pellet process cannot escape the pelletizer chamber, the material above the roller will absorb the steam. This can cause bridging of the input material, which will stop material feed or affect pellet quality. If the material above the roller absorbs the steam, this will increase that material's moisture content and the characteristics of the material in the pelletizer extruder, and pellet quality will change.
Therefore, material feed rate should be regulated in tern with pelletizer productivity. At the beginning of production, the pelletizer extruder should be fed at a lower rate and increased as the pellet mill temperature increases Therefore, the feed rate should mirror the performance of the pelletizer equipments and slowly increase up to maximum productivity. As the productivity of the pelletizer is variable based on the characteristics of the raw material, the feed rate will also have to adjust. The target feed rate should be to have the pelletizer extruder rollers covered but no more.
