| 摘要 |
A machine for the classification, sieving and separation of non-homogeneous masses of materials comprises a feed ( 12 ) for such non-homogeneous masses ( 11 ) and a discharge ( 13 ) for a coarse portion of material ( 11 A), respectively arranged at opposite ends of a selection bed ( 14 ) of the non-homogeneous masses ( 11 ) comprising a plurality of rotary elements ( 15 ) arranged adjacent to each other and suitable for determining the movement of the material, in which the rotary elements ( 15 ) can be spaced apart by a predefinable amount to define passage ports ( 16 ) for a portion of material ( 11 B) of predetermined shape and size of the non-homogeneous masses and in which the rotary elements ( 15 ) have a cross section with cam profile ( 17, 18 ) or variable radius, in other words having a different cross section to the cylindrical section, the cam profile ( 17, 18 ) being suitable for developing a sinusoidal peripheral speed of the rotary elements ( 15 ).
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