Machine and method for shredding inorganic waste

Machine for shredding inorganic waste, of the type comprising:

• first loading means, suitable for receiving the materials to be shredded and for pouring them into a shredding chamber;
• second shredding means, driven by a motor, suitable for shredding the introduced materials;
• third unloading means, suitable for collecting the shredded materials;
• fourth electronic means of controlling the operation of the machine;
• fifth means, controlled by said fourth electronic means, adapted to limit the resisting torque applied to said motor, in such a way as to avoid current absorption that exceeds the capacity of the power supply network, said fifth means comprising one or more elements movable, adapted to assume positions that allow the introduced materials to be gradually poured into the shredding chamber, so that the motor can be started empty or with minimum load, said fifth means further comprising a plurality of knives which interact with each other to carry out the shredding of the materials introduced, said interaction being controlled in order to avoid excessive accumulations of material between said knives so as to prevent the resistant torque, due to the cutting action, generates current absorption by the motor higher than the capacity of the power supply network;
• characterized in that said second shredding means comprise said shredding chamber in which there is a main rotor, driven by a motor and provided with a plurality of knives which interact with the knives of a rake, said rake being movable to bring said knives to interact with said knives of said main rotor, the position of said rake with respect to said main rotor being adjustable so as to check that the resistant torque due to the cutting action of the knives generates current absorption by the motor not exceeding the capacity of the power supply network;
• and in that said shredding chamber is limited by solid walls comprising:
• a first section, substantially circular in shape and having a center on the axis of said main rotor;
• a second section, which is connected with said first section, of a substantially circular shape, but with a greater radius than the previous one so as to increase the distance between the trajectory of the ends of the blades and the wall of the shredding chamber;
• said movable element which, after having poured the materials to be treated into the shredding chamber, is arranged in such a way as to close said shredding chamber.