| 摘要 |
PROBLEM TO BE SOLVED: To simply alter the size of an annular discharge hole for discharging the parison by making an annular die part and an annular core part replaceable through a spline. SOLUTION: In a die/core structure and a die/core replacing method, and an apparatus therefor, a die (200) has the spline and comprises an annular die support (10) and an annular die part (13), both of which are freely detachable mutually, and a core 1 has a spline and comprises a core shaft (2) and the annular core part (4) both of which are freely detachable mutually. By raising, lowering and turning the annular core part (4) and the annular die part (13), the replacement of the die/core can be replaced freely. COPYRIGHT: (C)2004,JPO
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