| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a die for forming a honeycomb structure capable of performing efficient electric discharge machining of slit grooves in the die for forming the honeycomb structure. SOLUTION: In the manufacturing method of the die for forming the honeycomb structure having feed holes 81 and the slit grooves 82, after forming the feed holes 81 in a hole opening surface 84 of a die stock 80, a plurality of prepared holes 83 are made so that a part at the position for making the slid grooves is communicated with the feed holes 81. Electric discharge machining is performed while sucking working fluid 7 from a groove forming surface 85 side to the hole opening surface 84 side through the prepared holes 3. Then, the electric discharge machining is stopped, the slit grooves 81 are opened, and back flow is performed in which the working fluid 7 is ejected from the hole opening surface 84 side to the groove forming surface 85 side via the prepared holes 83. Then, the electric discharge machining and the back flow are alternately repeated to form the slit grooves 81.
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