Defibration device

Abstract

A defibration device includes: a casing having a supply port through which small pieces containing fibers are supplied and a discharge port through which defibrated materials of the small pieces are discharged; a rotator rotatably installed in the casing; and a pipe body which is coupled to the supply port and from which the small pieces are ejected into the casing. The rotator includes at least one diffusion vane provided at a side portion of the rotator that faces the supply port and diffusing the small pieces ejected from the pipe body, and at least one defibration blade provided on an outer periphery portion of the rotator and defibrating the small pieces, and a pipe axis direction of the pipe body intersects a rotation track of the diffusion vane when the rotator rotates.

What is claimed is: 
     
         1 . A defibration device comprising:
 a casing having a supply port through which small pieces containing fibers are supplied and a discharge port through which defibrated materials of the small pieces are discharged;   a rotator configured to be rotated and installed in the casing; and   a pipe body which is coupled to the supply port and from which the small pieces are ejected into the casing, wherein   the rotator includes at least one diffusion vane provided at a side portion of the rotator that faces the supply port and diffusing the small pieces ejected from the pipe body, and at least one defibration blade provided on an outer periphery portion of the rotator and defibrating the small pieces, and   a pipe axis direction of the pipe body intersects a rotation track of the diffusion vane when the rotator rotates.   
     
     
         2 . The defibration device according to  claim 1 , wherein
 the diffusion vane includes a plurality of diffusion vanes provided to be spaced apart from each other along the rotation track, and   a length of an ejection port of the pipe body along the rotation track is greater than a distance between the diffusion vanes in a direction along the rotation track.   
     
     
         3 . The defibration device according to  claim 2 , wherein the ejection port has an elongated shape extending along the rotation track. 
     
     
         4 . The defibration device according to  claim 1 , wherein a length of the diffusion vane in a radial direction of the rotator is greater than a length of an ejection port of the pipe body in the radial direction of the rotator. 
     
     
         5 . The defibration device according to  claim 1 , wherein a cross-sectional area of an inner cavity of the pipe body decreases toward an ejection port of the pipe body. 
     
     
         6 . The defibration device according to  claim 5 , wherein θ 1 <θ 2 , in which θ 1  is an inclination angle, with respect to a rotation axis of the rotator, of a portion of an inner surface of the pipe body that is closest to the rotation axis, and θ 2  is an inclination angle, with respect to the rotation axis of the rotator, of a portion of the inner surface of the pipe body that is farthest from the rotation axis.