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    • 8. 发明授权
    • Method of making a rotationally molded container rim
    • 制作旋转模制容器边缘的方法
    • US5922267A
    • 1999-07-13
    • US882257
    • 1997-06-25
    • Anthony J. BresciaSmith E. Trent, III
    • Anthony J. BresciaSmith E. Trent, III
    • B29C33/10B29C41/06B65D1/16B65F1/02
    • B65D1/16B29C33/10B29C41/06B65F1/02
    • A rotationally molded container rim and method for fabrication thereof. The inventive method includes rotationally molding a container while at the same time integrally molding a circumferential rim having an enclosed interior void. Molten plastic and unmelted particles flow from a primary portion of the mold through a gap of uniform width into a secondary mold portion to form the rim. During molding, air is vented from the enclosed void to ambient air outside the mold through a vent opening. The vent opening preferably includes a hollow tube. The rotationally molded container rim that is formed according to the inventive method preferably includes walls that form an enclosed polygonal section. The walls enclose the interior void and at least one vent opening leads from the interior of the rim to the outside of the container.
    • 旋转成型的容器边缘及其制造方法。 本发明的方法包括旋转模制容器,同时整体模制具有封闭的内部空隙的圆周边缘。 熔融的塑料和未熔化的颗粒从模具的主要部分通过具有均匀宽度的间隙流入二次模具部分以形成边缘。 在模制过程中,空气通过排气孔从封闭空间排出到模具外部的环境空气中。 排气口优选包括中空管。 根据本发明方法形成的旋转模制的容器边缘优选地包括形成封闭的多边形部分的壁。 壁围住内部空隙,并且至少一个通气口从边缘的内部引导到容器的外部。