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    Molding arrangement to achieve short mold cycle time
    4.
    发明授权
    Molding arrangement to achieve short mold cycle time 失效
    成型布置实现短模周期时间

    公开(公告)号：US5702735A

    公开(公告)日：1997-12-30

    申请号：US536930

    申请日：1995-09-29

    申请人： Wallace Anthony Martin ,  Wybren van der Meulen ,  Edgar V. Menezes ,  Kornelis Renkema ,  Robert B. Phillips ,  Victor Lust ,  Jongliang Wu ,  Gerbrand Eshuis

    发明人： Wallace Anthony Martin ,  Wybren van der Meulen ,  Edgar V. Menezes ,  Kornelis Renkema ,  Robert B. Phillips ,  Victor Lust ,  Jongliang Wu ,  Gerbrand Eshuis

    IPC分类号： B29C45/26 ,  B29C33/00 ,  B29C33/04 ,  B29C33/06 ,  B29C33/30 ,  B29C33/38 ,  B29C33/56 ,  B29C45/00 ,  B29C45/37 ,  B29C45/73 ,  B29D11/00 ,  B29K25/00 ,  B29L11/00 ,  G02C7/04

    CPC分类号： B29D11/0048 ,  B29C33/306 ,  B29C33/3842 ,  B29C33/56 ,  B29C45/37 ,  B29C45/73 ,  B29D11/00028 ,  B29D11/00125 ,  B29D11/0023 ,  B29C2045/7343 ,  B29C2045/7362 ,  B29L2011/0016 ,  B29L2031/757 ,  Y10S425/808

    摘要： An apparatus for molding polystyrene mold halves which are used, for subsequent molding of a soft contact lens. The apparatus is designed with superior heat conduction capacity so as to minimize the molding cycle time, while simultaneously producing uniformly precise and accurate optical quality surfaces. Molten polystyrene is provided via a hot runner system to a plurality of mold cavities. In a specific variation, the convex surface provides the optical quality surface to the concave surface of the mold half produced thereby. The structural element which defines the convex surface includes a hollow cylindrical bushing and a removable power insert mounted therein, which may be changed so that the prescription strength of the contact lens to be formed by the mold may be varied. In a first embodiment, the power insert includes only a convex surface at its operational end. In a second embodiment, the power insert includes an annular flat surface surrounding the convex surface, defining at the junction therebetween a discontinuity of curvature, which imparts a sharp edge to the mold half formed thereby. The power insert may be constructed of pure steel, or alternatively, it may be made of brass, copper chromium, or cobalt-nickel alloyed martensitic steel. The power insert may be coated with a surface layer of nickel phosphor or silicone oxide, or chrome nitride. These layers may be turned to their proper thicknesses and dimensions by diamond cutters, and they may be thermally hardened.

    摘要翻译： 用于模制聚苯乙烯半模的装置，用于随后模制软性隐形眼镜。 该设备设计具有优良的导热能力，以便最小化成型周期时间，同时产生均匀精确和准确的光学质量表面。 熔融聚苯乙烯通过热流道系统提供到多个模腔。 在具体的变型中，凸表面将光学质量表面提供给由此产生的半模的凹形表面。 限定凸表面的结构元件包括中空圆柱形衬套和安装在其中的可移除动力插入件，其可以改变，使得由模具形成的隐形眼镜的处方强度可以变化。 在第一实施例中，功率插入件在其操作端仅包括凸面。 在第二实施例中，动力插入件包括围绕凸表面的环形平坦表面，在其间的连接处限定曲率不连续性，其向由此形成的半模赋予尖锐边缘。 动力插入件可以由纯钢构成，或者也可以由黄铜，铜铬或钴镍合金马氏体钢制成。 功率插入件可以涂覆有镍磷光体或氧化硅表面层或氮化铬。 这些层可以通过金刚石切割器转到其合适的厚度和尺寸，并且它们可以被热硬化。

    Molding arrangement to achieve short mold cycle time and method of molding
    7.
    发明授权
    Molding arrangement to achieve short mold cycle time and method of molding 失效
    成型布置实现短模周期时间和成型方法

    公开(公告)号：US5545366A

    公开(公告)日：1996-08-13

    申请号：US257794

    申请日：1994-06-10

    申请人： Victor Lust ,  W. Anthony Martin ,  Kornelis Renkema ,  Wybren Van Der Meulen

    发明人： Victor Lust ,  W. Anthony Martin ,  Kornelis Renkema ,  Wybren Van Der Meulen

    IPC分类号： G02C7/04 ,  B29C33/00 ,  B29C33/04 ,  B29C33/06 ,  B29C33/30 ,  B29C33/38 ,  B29C33/56 ,  B29C45/26 ,  B29C45/37 ,  B29C45/73 ,  B29D11/00 ,  B29K25/00 ,  B29L11/00 ,  B29C45/20

    CPC分类号： B29D11/0048 ,  B29C33/306 ,  B29C33/3842 ,  B29C33/56 ,  B29C45/37 ,  B29C45/73 ,  B29D11/00038 ,  B29D11/0023 ,  B29C2045/7343 ,  B29C2045/7362 ,  B29L2011/0016 ,  B29L2031/757 ,  Y10S425/808 ,  Y10S425/812

    摘要： An arrangement for molding a front or back polystyrene mold half which is used, with a second complementary back or front mold half, for subsequent molding of a soft contact lens such as a hydrogel soft contact lens. Each mold half defines a convex curved surface and a concave curved surface spaced therefrom, with one of the surfaces defining an optical quality curved surface for the soft contact lens. A heated molding machine introduces molten polystyrene through a hot runner system to a plurality of mold cavities, each of which defines an optical quality curved surface and also a second noncritical surface. The optical quality surface of the mold cavity is positioned further away from the heated hot runner side of the mold than the second surface, which allows faster cooling of the optical quality surface of the mold cavity. Each mold cavity has a first insert on the optical quality side of the mold cavity and a second insert on the second side. Each of the first and second inserts has a circumferential cooling passageway defined therearound or in proximity for the first inserts, and also includes a bubbler positioned internally therein. Coolant is circulated in a turbulent mode through the circumferential passageways and also through the bubblers against inner surfaces of the insert to provide rapid cooling of the mold cavity.

    摘要翻译： 用于模制前或后聚苯乙烯半模的装置，其具有第二互补的后模或前半模，用于随后模制诸如水凝胶软性隐形眼镜的软性隐形眼镜。 每个模具半部限定凸起的弯曲表面和与其间隔开的凹形曲面，其中一个表面限定用于软性隐形眼镜的光学质量弯曲表面。 加热成型机将熔融聚苯乙烯通过热流道系统引入到多个模腔中，每个模腔限定光学质量曲面和第二非临界表面。 模腔的光学质量表面定位成比第二表面更远离模具的加热热流道侧，这允许更快地冷却模腔的光学质量表面。 每个模腔在模腔的光学质量侧具有第一插入件，在第二侧上具有第二插入件。 第一和第二插入件中的每一个具有围绕第一插入物限定在其周围或邻近的周向冷却通道，并且还包括位于其内部的起泡器。 冷却剂以湍流模式通过周向通道循环，并且还通过鼓泡器抵靠插入件的内表面，以提供模腔的快速冷却。

    Variable Focus Lens Package Having Clamping Means For Fixing the Various Lens Package Elements With Respect to Each Other
    8.
    发明申请
    Variable Focus Lens Package Having Clamping Means For Fixing the Various Lens Package Elements With Respect to Each Other 审中-公开
    具有用于固定各种透镜封装元件的夹持装置的可变焦距透镜封装件

    公开(公告)号：US20080225403A1

    公开(公告)日：2008-09-18

    申请号：US10597416

    申请日：2005-01-24

    申请人： Johannus Wilhelmus Weekamp ,  Edwin Maria Wolterink ,  Kornelis Renkema

    发明人： Johannus Wilhelmus Weekamp ,  Edwin Maria Wolterink ,  Kornelis Renkema

    IPC分类号： G02B3/14 ,  G02B7/02

    CPC分类号： G02B3/14 ,  G02B7/026 ,  G02B7/028 ,  G02B26/005

    摘要： A variable focus lens package (2) comprises an annular body (10) having a through-hole (11), which is closed off by means of lens members (30, 70), and which is sealed by means of sealing rings (50, 60). The through-hole (11) is filled with quantities of water (86) and oil (87), which are separated by a meniscus (88). The various lens package elements are fixed with respect to each other by means of clamping units (20a, 20b). By this arrangement, a very compact and robust lens package (2) is obtained. A portion of the surface of the body (10) is covered with an electrically conducting layer (16). The shape of the meniscus (88) is variable under the influence of a voltage between this electrically conducting layer (16) and the water (86). In this way, the meniscus (88) is applicable as a lens having an adjustable focus.

    摘要翻译： 可变焦距透镜封装（2）包括具有通孔（11）的环形体（10），通孔（11）通过透镜构件（30,70）封闭，并且通过密封环（50 ，60）。 通孔（11）中填充有水分（86）和油（87），它们由弯液面（88）分开。 各种透镜封装元件通过夹紧单元（20a，20b）相对于彼此固定。 通过这种布置，获得了非常紧凑和坚固的透镜组件（2）。 主体（10）的表面的一部分被导电层（16）覆盖。 弯液面（88）的形状在该导电层（16）与水（86）之间的电压的影响下是可变的。 以这种方式，弯液面（88）可用作具有可调焦点的透镜。