| 摘要 |
PROBLEM TO BE SOLVED: To prevent a water leak around a water cut-off member attributable to a mold partition line in time of molding, in a stopper such as one mounted at a part where the water cut-off member is molded continuously with a male thread. SOLUTION: A second female thread 31 is formed in an opening part 35 of a stopper body 19 mounted in an upper opening part of a container body for a beverage, and the second male thread 30 threaded into the second female thread 31 is molded in a lid body 14 covered over the opening part 35. A lower lid body part 29 including the second male thread 30 constituting the lid body 14 and an upper lid body part 28 concealing the opening part 35 of the stopper body are joined, and a recessed part 32 mounted with the water cut-off member 33 for the lid body which is stuck to an upper opening part 12, is molded in a junction part between the lower lid body part 29 and the upper lid body part 28. The recessed part 32 is molded by a mold 51 released nearly parallel with the central axis 18. Therefore, the mold partition line such that the mold partition line crosses the recessed part 32 is not molded, and the water cut-off member 33 for the lid body can be closely installed to the recessed part 32 without the mold partition line to improve watertightness in that part. COPYRIGHT: (C)2013,JPO&INPIT
|
