| 摘要 |
PROBLEM TO BE SOLVED: To provide a plating method capable of obtaining a die for injection molding having a satisfactory molded face free from roughness and further having a long service life in a plating method for a die for injection molding comprising a stock consisting essentially of beryllium copper. SOLUTION: The plating method is the treatment of applying plating, e.g., to the surface of a die for injection molding consisting of beryllium copper as the stock. In the method, successively to degreasing treatment 1, electrolytic activation treatment 2 is performed, then, nickel strike plating treatment 3 and mat nickel plating treatment 4 are performed, further, amorphous electroless nickel plating treatment 5 and passivation treatment 6 are performed, and finally, posttreatment 7 such as water washing treatment, pure hot water washing and drying is performed. By the plating treatment, the die for injection molding free from surface roughness, reduced in the change of dimensions and having a long die life can be obtained. COPYRIGHT: (C)2005,JPO&NCIPI
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