| 摘要 |
PROBLEM TO BE SOLVED: To provide the structure of a mold which can mold a nipple high in holding force and strength and excellent in commercial value in consideration that a conventional nipple molding bas a small step size at the tip of a nipple part, and the inclination angle of a neck part is restricted so that holding force is weak when a hose is fitted, and since a mold is opened forcibly, whitening is generated easily to deteriorate its commercial value and strength. SOLUTION: The second symmetric slide cores of a pair are engaged with the first slide core in the form of a taper to be interlockable. This is fitted to the movable mold of a nipple part.
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