VENTILATION CAP FOR WRITING UTENSIL OR THE LIKE, AND ITS MOLDING DIE,申请号JP19980115442-传众专利搜索

VENTILATION CAP FOR WRITING UTENSIL OR THE LIKE, AND ITS MOLDING DIE

申请公布号：JPH11301171(A)

申请号：JP19980115442

申请日期：1998.04.24

申请公布日期：1999.11.02

申请人：

MITSUBISHI PENCIL CO LTD

发明人：OBA SHIGEKI

分类号：B43K23/08;B29C45/26

主分类号：B43K23/08

摘要：PROBLEM TO BE SOLVED: To provide a die structure wherein when a ventilation cap which connects an internal cap and an external cap by a rib, is integrally molded, there is no fear for the breakage of the die, and a stable integral molding can be performed, and the ventilation cap which is manufactured by the die. SOLUTION: An internal cap of which the major purpose is to prevent an ink from evaporating is brought into contact with the inside of an external cap with a rib, under a concentric state, and by a gap between the internal cap and the external cap, a ventilation cap equipped with a ventilation hole which is partitioned by the rib, is integrally molded by this die, and butting parts 7a, 7b of cores (1), 9 on the fixed side and the movable side, which form the ventilation hole, are made tapered shapes which are male-female-engaged, and a groove 15 is provided on the butting part 7b on the movable side core 9.