| 摘要 |
PURPOSE:To apply electrodeposition to the necessary part only of a tool instrument in high yield without wasting expensive polishing particles, in applying polishing particles to the surface of a tool instrument to be electrodeposited along with a metal by electrodeposition, by coating the surface of each polishing particle with a magnetic metal while attaching a magnetic means to the opposite side of the polishing particle electrodeposition part of the tool instrument. CONSTITUTION:In forming a metal plating layer in which ultra-hard polishing particles comprising diamond or boron nitride are mixed to the necessary part of a tool instrument 10 to be electrodeposited, a soluble anode 9 comprising a metal to be electrodeposited is arranged in an electrodeposition cell 5 and a plating bath 6 of said metal is put in said cell 5. Each polishing particle 7 is coated with a film 8 comprising a magnetic metal such as Ni, Fe or Co while electromagnetic means 13, 14 each having a shape to be electrodeposited are attached to the opposite side of the electrodeposition part of the tool instrument 10 to be electrodeposited. In this state, when the tool instrument 10 to be electrodeposited is used as a cathode and a current is supplied, the polishing particles 7 are attracted to the opposite side surfaces of the electromagnetic means 13, 14 in the tool instrument 10 to be electrodeposited and electrodeposited along with the metal to be plated in high yield without being precipitated to the bottom of the tank 5 by gravity.
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