| 摘要 |
Production of tapping valve formed as plastic injection-molded part, especially flap valve or ball valve, for plastic or metal shipping and storage tanks for liquids, comprises producing screw cap in first injection mold, then placing screw cap in second injection mold; and producing valve body in second injection mold where inlet connection of valve body extends through opening of ring shoulder and threaded hole of screw cap with clearance. Production of tapping valve formed as plastic injection-molded part, especially flap valve (1) or ball valve, for plastic or metal shipping and storage tanks for liquids, with valve body (2), which has externally threaded outlet connection (9) and inlet connection (7) with screw cap for screwing the valve body onto the externally threaded outlet connection of the liquid tank, the screw cap being captively held and movable on the inlet connection between a collar of the inlet connection and support studs (11, 12) of the valve body for a rotating shaft (10) of a valve closing element, the method comprises producing the screw cap in a first injection mold, then placing the screw cap in a second injection mold; and producing valve body in the second injection mold in such a way that the inlet connection of the valve body extends through an opening of the ring shoulder and a threaded hole of the screw cap with clearance, where the collar of the inlet connection of the valve body is located inside the screw cap. |
