Mixing and pulverizing device, melting method for mixing, and method of molding cellulose material impregnated with binder

A crushing and mixing device and a mixing and melting method attained by the crushing and mixing device having a mixing vessel 3 in which a plurality of blades 10 a to 10 f are installed on a rotary shaft 5 which is rotated by a motor 8 as a driving source and freely rotatably supported, to mix and crush materials; wherein a spiral vane 12 is equipped to supply the materials which are introduced to a rotary shaft 5 corresponding to an inlet for materials, to the mixing vessel 3 ; at least two blades of the plurality of blades 10 a to 10 f are installed on the rotary shaft at an inclined angle which reduces each other's opposing space in the rotating direction; an outlet 17 is disposed at a side of a wall of the mixing vessel to take out the materials when the mixed and crushed material reaches a predetermined state; the materials are mixed and crushed in the mixing vessel 3 , and an entrained moisture therein is dewaterd by the heat generated by actions of shearing, friction and compression; and a molten binder is impregnated in the dehydrated materials. This device and method provide methods for utilizing or reusing materials which are problematic for conventional methods in terms of cost and productivity, the materials such as chipped woody waste materials or woody waste materials like pruned branches and leaves of trees, and plant materials and plant-waste materials like stems and leaves of wheat, and are suitable for applications to enhance utilization of wasted materials by improving the filling ratio thereof and to promote reuse of the wasted materials.