| 摘要 |
PROBLEM TO BE SOLVED: To provide a forging die device which can heat a material in the die efficiently and elongate the span of die holder life. SOLUTION: While ring-like outside swelling parts 2d are installed at an outside round wall part of accommodation holding parts 2A of a die holder 2, ring-like inside swelling parts 2C are formed inside of the round wall at positions corresponding to a material in the die 1. The ring-like inside swelling parts 2C are brought into contact with an outer peripheral face of the die 1, and upper ring-like spaces 2a and bottom ring-like spaces 2b are formed at above and bottom of the ring-like inside swelling parts 2C. When heated with a heating coil 5, the maximum current flows nearby the ring-like outside swelling parts 2d of the die holder 2 and the portions are highly heated. The heat generated at the ring-like outside swelling parts 2d is conducted to the die 1 via the ring-like inside swelling part 2C. Since the upper ring-like space 2a and the bottom ring-like space 2b are formed at above and bottom of the ring- like inside swelling part 2C, heat dispersion to unnecessary portions are restricted and the heat can be conducted efficiently to neighboring of the material in the necessary die 1.
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