| 摘要 |
<p>PURPOSE:To provide a dry old paper defibrating device for reducing the amount of non-defibrated material produced by defibrating raw material old paper in high defibration ratio. CONSTITUTION:In a cylindrical casing 11 equipped with a denture mold showing a cross-sectional wavy shape along the peripheral direction in the inner peripheral face, a centrifugal impeller 12 is concentrically arranged with a gap space from the casing. By revolving the centrifugal impeller, previously finely cut raw material old paper is sucked together with an air flow, passed through a gap space between the denture mold of the cylindrical casing and the centrifugal impeller and defibrated into a fibrous state, the centrifugal impeller 12 has a scirocco fan type impeller structure radiately provided with a great number of vanes 121 with a size short in the radial direction and long in the axial direction and the number of the vanes can be increased without disturbing suction of raw material old paper caused by narrowed gaps between the vanes at the suction inlet of the impeller.</p> |
