System for the processing of powder material and associated lump breaker device, in particular for a production plant of brake pads

A system for processing a powder material, the powder material consisting in a friction material or a friction material mixture for production of friction material blocks for brake elements, or a mixture for production of an underlayer for brake elements, the brake elements being brake pads or brake shoes the system comprising:

• a weighting device configured to receive and weight onto a collecting element thereof a predetermined quantity of the powder material;
• a feeding device configured to cause a flow of said powder material towards the collecting element of the weighting device;
• a control unit configured to stop the feeding device in response to a signal generated by the weighting device when the collecting element thereof receives said predetermined quantity or is close to receive said predetermined quantity;
• and
• a rotating device interposed between the feeding device and the collecting element to intercept lumps present in the flow of said powder material;
• wherein said rotating device consists of a lump breaker device arranged immediately downstream the feeding device, with reference to a moving direction of said flow of powder material, and comprising:
• i) a rotating drum arranged in front of an outlet end of the feeding device and adjacent to it, in order to intercept the whole flow of powder material, the feeding device being configured to cause the whole flow of powder material to hit a lateral surface of the drum;
• ii) a motor arranged on one side of the drum and configured to rotate the drum towards the outlet end of the feeding device upside down;
• and
• iii) the lateral surface of the drum being provided with a plurality of depressions on a whole extension thereof.