| 摘要 |
PROBLEM TO BE SOLVED: To provide a combined forming die which is not broken by cracking due to high load and heat during forming and the ceramic inner sleeve of which is not slipped out of an outer sleeve by the load during forming. SOLUTION: This die is a forming die having a die the ceramic inner sleeve of which is inserted into a metallic outer sleeve, an upper punch and a lower punch, a groove is formed on the outer periphery of the ceramic inner sleeve and a cavity is provided on the boundary between the ceramic inner sleeve and the metallic outer sleeve. COPYRIGHT: (C)2007,JPO&INPIT
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