Method and device for plating piston

Abstract

Abstract PURPOSE:To avoid generation of defect due to sticking of hydrogen gas, impurities or floating matter generating in a plating tank on ring grooves of a piston and to form a plating layer of uniform thickness both in the upper and lower sides of the ring grooves at one time by attaching the piston in a manner that the ring grooves direct vertically and then plating the piston. CONSTITUTION:A hooking tool 8 for a cathod is horizontally mounted on cathode supporting beds 1 provided on both sides of a tank. The hooking tool 8 is almost T-shaped, consisting of a horizontal bar 9 and a vertical bar 11 of proper length so that the lower half of the bar 11 is dipped in a plating liquid 10. A piston 12 is fixed to a piston mount 14 on the lower half of the vertical bar 10 in a manner that the ring grooves of the piston are vertically aligned. With this constitution, hydrogen gas, impurities or floating matter generating in the plating liquid move upward or precipitate downward along the grooves and do not remain in the grooves. By pulling the hooking tool 8 into air, fixing the piston to the tool 8 outside of the plating tank, and then by mounting the tool on the supporting beds 1, the cathode system can automatically by formed. Thus, plating can be performed by allowing metal ions dissolved from the anode into the plating liquid to precipitate on the ring groove surface.

Inventors

• 👤 Kazuo Tamada
• 👤 玉田　一夫

Bibliographic Details