Along with the development of national economy and living level, demands for all kinds of fodders are increasing continuously. Ring die is the easy-wearing part of wood pellet machine. Nowadays, demands for ring die in world market develop, too. Quality of ring die can directly influence the manufacturing cost and quality of biomass pellets.
According to the incomplete statistics, cost for repairing the ring die accounts for more than 30% in the whole cost. Quality of biomass pellets can directly decide the marketing situation. Therefore, it is quite important to rightly select, use and maintain the ring die.
Through the reducer, dynamo drives the ring die to revolve. Press rollers, which are installed in the ring die, can not revolve but can rotate due to the frictional force of revolving ring die. Materials in pressing chamber, which have been modulated well, are evenly distributed in the distance between press rollers. Under the pressure of press roller, materials are continuously pressed into biomass pellets.
Along with the revolution of ring die, biomass pellets are cut by the outside blades into products with desirable size. Linear speeds of press roller and ring die are almost similar at any contacting points. All pressure of press roller is used for pelletize materials. During the working process of wood pellet mill, frictional force always exists between ring die and raw materials.
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