| 摘要 |
PROBLEM TO BE SOLVED: To provide: a screw cap with sealing that allows determination that the cap is opened by an opening operation of the cap when opening the cap and that prevents the interval of a sealing ring slit from extending; and to provide a mold for molding the screw cap when drawing the cap away from a core when molding.SOLUTION: In a screw cap A with sealing and a mold for molding the screw cap A, the screw cap A is composed of a cap body A1 and a sealing ring A2; the sealing ring A2 includes a belt body 11 having a predetermined slit 10, and a breakable weakened portion 12; a cut-preventing portion is formed at both ends of the outer periphery of the belt body 11; the mold B includes a cavity and a core; a molding portion on which the cut-preventing portion of the sealing ring A2 is formed is disposed on the inner surface of the cavity; and the molding portion of the cavity and its vicinity are engaged with the cut-preventing portion of the sealing ring A2 and its vicinity for fixing both the ends of the belt body 11 of the sealing ring A2 when the screw cap A is formed. |
