| 摘要 |
PURPOSE:To pressurize a magnetic core with a regulated and stable pressing force, by selecting a ceramics material as the material of the flat spring of a gap forming jig. CONSTITUTION:A gap forming core holding main body 1 consists of a pair of magnetic head cores 21 and 22 to form a gap, a presser plate 2, a flat spring 3 made of a zirconia, a pressurizing screw 4 to pressurize the flat spring, and a bonding glass 23 to weld the magnetic head cores 21 and 22. In a gap forming process, the relative positions of the magnetic head cores 21 and 22 are fixed, and a prescribed pressure is applied by the pressurizing screw 4. At such a time, a deformed flat spring 3 generates a resiliency, and continues to pressurize the magnetic head cores 21 and 22 through the presser plate 2. The magnetic head cores, after being heated and held at an electric furnace to bond them by a molten glass at 500 deg.C for thirty minutes, are annealed. In this way, it is possible to fully pressurize the magnetic head core with a regulated and stable pressing force even at a high temperature area where the glass is melted.
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