| 摘要 |
The present invention provides a composite spout and an injection molding apparatus for molding the composite spout. In the composite spout, a sleeve fitted to a core member is not displaced during injection molding and the end face of the sleeve is not exposed to the inside of a spout body. A functional resin layer is provided as an intermediate layer in the sleeve, a spout body is injection-molded with the sleeve that functions as a core and is put over the core member of an injection molding die. Therefore, substantially only the inner peripheral surface of the sleeve is exposed to the inner peripheral surface of the spout body. At least a circumferential part of one end of the inner peripheral surface of the spout body meets the inner peripheral edge on one end side of the sleeve or forms a slope radially outwardly tilting from the part of the spout body toward the one end of the spout body. |
