| 摘要 |
PURPOSE:To attempt the improvement of quality and speed in engraving by working the contour of figured sections to be formed on the engraving surface of a material for seals precisely with the use of small engraving width, and engraving the rest thereof, that is, unfigured sections not only with the use of wide engraving width but also with the use of a wide moving space. CONSTITUTION:A chuck member 3 comprises a stationary block 4 in a form of V, a movable pressing block 5 and a pressing spring 6. In addition, an axis X, an axis Y and an axis Z feeding means 10, 11 and 12 operating a cutting blade 2 are provided, and a curving machine 9 driving rotatably the cutting blade 2 is fixed on a Y axis table 20. Then, the contour of figures to be formed on the engraving surface 7 of a material for seals 1 is set up in such a way that the working radius of the cutting blade 2 is minimum for engraving. In the second place, when the unfigured section is formed, the working radius and moving space of the cutting blade 2 are made greater than those required for engraving the figured section. This constitution thereby enables a seal to be formed individually and speedily with high quality provided.
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