Wood pellet mill is an important machine to produce the biomass pellets, which can be used for industries like animal husbandry, poultry farming and fishery, etc.
In recent years, quality of wood granulation machine is greatly improved.
Extrusion technology has been used at abroad for 60 years, while less than 10 years at home.
If we do not consider the functions of fodders, contacting surface between press roller and ring die in wood pellet mill will be easy to have larger contact stress and local flexible deformation.
If layer thickness of raw materials in feeding area is larger than the largest starting point of deforming area, output and working current of sawdust pellet mill will not be influenced while the layer thickness of raw materials indeed increases in feeding area.
Researches on mechanism of sawdust pellet mill play important roles to improving the working performance.
Since the liner speeds of press roller and ring die are basically similar and diameter of press roller is 0.4 to 0.47 times of ring die, wearing rate of press roller is 2.5 times of ring die.
Pelletizing chamber of saw dust pellet machine is consisted of the main dynamo, transmission device, rotors, ring die, press roller, blades and door, etc.
If plastic deformation of die holes is serious, biomass pellets will be hard to be produced.
According to the failure mode of key parts, plastic deformation refers to the unrecoverable and long-term deformation of die under the heavy load and large friction force.
