| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing a thin hole tube having good inside surface finishing accuracy by controlling conditions for selection of the material quality of a core material, the composition of an electroplating bath, etc., so as to generate the internal stress of compression in an electroforming layer, thereby easily removing the core material without the addition of means for dissolving, melting, etc. SOLUTION: Both ends of the core material 5 are mounted at a fixture 1 and shielding tapes are deposed near the mounting parts. A fixture body is immersed into a bath liquid 10 of an electrolytic cell 9. The bath liquid is internally provided with a plurality of nickel anode electrodes 11. The core material 5 is rotated by a motor 7 and the electroforming layer is formed on the surface of the core material 5. Where the layer attains a prescribed thickness, the fixture 1 is pulled up from the electrolytic cell 9. The integrated body of the core material 5 and the electroforming layer 12 is removed and the shielding tapes are removed. The electroforming layer 12 is detained to a fixture for pulling the core material and the core material 5 is pulled, by which the pore tube by the nickel electroforming layer is completed.
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