Annular gated mold for the injection molding of contact lenses
    3.
    发明授权
    Annular gated mold for the injection molding of contact lenses 失效
    环形浇注模具用于注射模塑隐形眼镜

    公开(公告)号:US5928682A

    公开(公告)日:1999-07-27

    申请号:US576743

    申请日:1995-12-21

    CPC分类号: B29C45/38 B29D11/00125

    摘要: A method and apparatus for the manufacture of optical polymer contact lenses in a closed mold, where a mold cavity is created between a front curve insert and a back curve insert, the side walls of the mold cavity being formed by the inner wall of a movable annular gate collar, the collar being positioned in a retracted position during polymer dosing and then moved prior to polymer cure into an extended position to complete the mold cavity and to separate the polymer curing inside the mold cavity from any waste polymer outside of the mold cavity.

    摘要翻译: 一种用于在封闭模具中制造光学聚合物隐形眼镜的方法和装置,其中在前曲面插入件和后曲面插入件之间产生模腔,模腔的侧壁由可移动的内壁 在聚合物计量期间,套环定位在缩回位置,然后在聚合物固化之前移动到延伸位置以完成模腔并且将模腔内的聚合物固化与模腔内部的任何废聚合物分离 。