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Shredding turns production or post-consumer waste into a bulk
material (ground material, chips) that is as homogenous as possible.
The shredding process is necessary before subsequent processing
steps can take place – for recycling into new materials or as a
substitute fuel. Because of the wide variety of materials that are
shredded, shredding machines usually need to offer a high degree of
flexibility. |
Material is generally fed into the shredder via a hopper. In this
case the material is introduced into the actual shredding chamber by
gravity. A pusher, which is controlled based on the load, presses
the material against the turning rotor. Here the material is
shredded between the rotor knives and the fixed stator knives. The
shredded material passes through the screen located below the rotors.
The screen hole diameter determines the chip size of the shredded
material that is produced. |
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Important design criteria for shredding machines include the
required properties of the shredded material – grain size, grain
size distribution, grain shape, etc. – as well as the delivery form
and achievable throughput, which are strongly dependent on the
material. |
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