Layout of an apparatus for crushing-breaking useless casting products, a fixed cutter device and a rocking cutter device used for the apparatus, and a method for coating the fixed cutter device and the rocking cutter device

A system for breaking casting products comprising:

• a feeding device sequentially supplying the casting products to a breaking apparatus, the feeding device being arranged at a predetermined position in a factory;
• the breaking apparatus constructed and arranged to break the casting products supplied by the feeding device, the breaking apparatus being arranged adjacent to the feeding device and at a predetermined position in the factory;
• and
• a discharging device sequentially conveying recyclable casting products broken by the apparatus, the discharging device being arranged adjacent to the breaking apparatus and at a predetermined position in the factory,
• wherein the breaking apparatus comprises,
• a fixed cutter device having a plurality of projection shaped mating cutters disposed in offset relation on a substantially flat plane thereof, and
• a rocking cutter device including a plurality of projection shaped rocking cutters in offset relation on a substantially flat plane thereof, the fixed cutter device and the rocking cutter device being engaged face-to-face with each other,
• and wherein the substantially flat plane of the fixed cutter device, the substantially flat plane of the rocking cutter device, the mating cutters of the fixed cutter device, the rocking cutters of the rocking cutter device, and circumferential surfaces of the mating cutters and the rocking cutters include a three-layered overlaying,
• and wherein top surfaces of the mating cutters and the rocking cutters include a four-layered overlaying.