The main characteristics of a grinder must be robustness and reliability; this is true of each of the parts of the machine, from the loading hopper and shredder unit to unloading.

From the technical point of view the shredder is made up of a loading unit, which very often has the characteristics of a simple hopper (1).
The function of this part should not be overlooked in that, in order to avoid problems in shredding it must be able to transport the material in the best way possible to the shedder unit.

I.S.V.E. S.r.l. has acquired long experience in the field of finding different solutions to the many problems of loading, endeavoring to satisfy as best as possible the characteristics of each by-product.

The cutting action of the grinder is carried out thanks to a series of cutting elements which by intersecting shred the material.
The main parts of the system are made up of sharp edged disks (3), equipped with hooks (2). Each hook has the job of "hooking" the product and to transport it towards the cutters (4) assembled on two or more counter rotating driving shafts which slice the material.
The grinding group is usually driven by an asynchronous ac electric motor which, linked to a gearmotor is able to produce the necessary forces needed in shredding.
When too much material transported or material which cannot be shredded builds up between the disks a thermoelectric couple temporarily inverts the rotation of the disks thus avoiding structural overloading or damage to the machine.

Experience acquired in the various sectors where employed enables the shredder group to be adjusted to the best of its possibilities without penalizing production capacity and regular operation.
The product is expelled after it has passed through a screen (5) which selects the material that has reached the required size.
The larger items get hooked again by the hooks and are recycled for further shredding: it goes without saying that the smaller the diameter of the screen mesh the more recycling processes through the shredder the material will have to undergo.

From what has been said it is clear that the overall concept behind the shredder is quite simple but extremely efficient.
The biggest advantages gained in using it refer principally to the low rotation speed of the disks. On the contrary to what happens in traditional mills, the cutting torque available is inversely proportional to the slower rotation speed of the shafts.
This characteristic enables it to operate with a low absorption of electric energy and decrease in noise level (less than 60 decibel).