| 摘要 |
PROBLEM TO BE SOLVED: To reduce the cost of a surface treatment while imparting characteristics by surface treatment to a bearing part in the manufacture of an extruding die. SOLUTION: A die (20) is formed by dividing it into a main die (21) including the bearing part (25) and a sub-die (31) without including the bearing part (25) in the extruding direction, wherein the surface treatment is applied to only the formed main die (21). COPYRIGHT: (C)2010,JPO&INPIT
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