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

A crushing and mixing device having a mixing vessel in which a plurality of blades are installed on a rotary shaft which is being rotated by a driving source and freely rotatably supported, to mix and crush cellulose-based materials and a binder;

• wherein
• a spiral vane is equipped to supply said materials which are being introduced to the rotary shaft corresponding to an inlet for materials, to said mixing vessel;
• said plurality of blades are constituted by at least two blades which are installed on said rotary shaft in an arrangement opposing each other in the axial direction of said rotary shaft on a site spaced at a predetermined angle in a circumferential direction thereof as well as being inclined at an angle which reduces each other's opposing space in the rotating direction thereof;
• said inclined angle of said blades to said rotary shaft is unchanged between a base of each said blade affixed on said rotary shaft and a tip thereof in its radial direction;
• an outlet is disposed at a side of a wall of said mixing vessel to take out said materials mixed and crushed in said mixing vessel;
• said rotary shaft being provided in said mixing vessel and said rotary shaft including one groove formed thereon that is constituted to enable to drain components derived from dehydration due to the heat generated by shearing, friction and compression of said materials in said mixing vessel;
• and
• a control means for controlling an opening/closing member disposed at said outlet of said mixing vessel for taking out said mixed and crushed materials, wherein said control means controls opening or closing of said opening/closing member based on a variation of a torque load which acts on a spindle of a motor as said driving source depending on the state of said materials which are being mixed, crushed and dried in said mixing vessel.