| 摘要 |
PROBLEM TO BE SOLVED: To accurately form a bottom-closed cylindrical body to have a thin bottom part while maintaining high rigidity of a side part.SOLUTION: A tubular pipe member 1 is used as a component for a side part of a bottom-closed cylindrical body, and a thin plate-shaped disk 2 is used as a component for a bottom part of the bottom-closed cylindrical body. The disk 2 arranged so as to close a bottom mouth of the pipe member 1 is fixed to the bottom mouth of the pipe member 1 by sucking air in a hollow part of the pipe member 1 by an air pump 500. In a state where the disk 2 is fixed to the pipe member 1 by suction by the air pump 500, the disk 2 and the pipe member 1 are immersed in a plating tank 200 and plated, and the disk 2 is fixed by a plating layer 3 continuously covering the disk 2 and the pipe member 1 so as to form a bottom part of the pipe member 1. |
