| abstract |
Molded articles in the form of grinding/cut-off wheels, drill bits, reamers, knife, blade, etc., having a core section or sections comprising a moldable resin of some intensive property, e.g., hardness, concentration, etc., and a surface layer or rim or section(s) comprising another moldable resin of different magnitude of the same intensive property e.g., hardness, concentration, etc., and abrasive articles selected from one or more of diamond, cubic boron nitride (CBN), alumina, SiC, garnet, and mixtures thereof. The articles are characterized in that a) the resins comprising the sections are miscible and diffusively or convectively mixed; b) a composition ratio of the abrasive articles in the resins is decreased inwardly from a surface of said molded article on a scale of the mesh size of the abrasive and article size; and c) the resins comprising the sections are miscible and diffusively mixed. |