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96 条记录 (耗时 0.059 秒)

    Simultaneous multiple layer curing in stereolithography
    7.
    发明授权
    Simultaneous multiple layer curing in stereolithography 失效
    同时多层固化立体光刻

    公开(公告)号：US06366825B1

    公开(公告)日：2002-04-02

    申请号：US09289842

    申请日：1999-04-12

    申请人： Dennis R. Smalley ,  Thomas J. Vorgitch ,  Chris R. Manners ,  Jocelyn M. Earl ,  Bryan J. L. Bedal ,  Charles W. Hull ,  Stacie L. VanDorin

    发明人： Dennis R. Smalley ,  Thomas J. Vorgitch ,  Chris R. Manners ,  Jocelyn M. Earl ,  Bryan J. L. Bedal ,  Charles W. Hull ,  Stacie L. VanDorin

    IPC分类号： G06F1900

    CPC分类号： G06F19/00 ,  B29C64/135 ,  B29C64/40 ,  B33Y50/00 ,  G05B2219/49013 ,  G06T17/00

    摘要： A method and apparatus for making high resolution objects by stereolithography utilizing low resolution materials which are limited by their inability to form unsupported structures of desired thinness and/or their inability to form coatings of desired thinness. Data manipulation techniques, based on layer comparisons, are used to control exposure in order to delay solidification of the material on at least portions of at least some cross-sections until higher layers of material are deposited so as to allow down-facing features of the object to be located at a depth in the building material which is equal to or exceeds a minimum cure depth that can effectively be used for solidifying these features. Similar data manipulations are used to ensure minimum reliable coating thicknesses exist, above previously solidified material, before attempting solidification of a next layer. In addition, horizontal comparison techniques are used to provide enhanced cross-sectional data for use in forming the object. Further, several techniques for automatically performing Z-error correction through the manipulation of a three-dimensional object representation are described.

    摘要翻译： 使用低分辨率材料通过立体光刻技术制造高分辨率物体的方法和装置，其受到不能形成所需薄度的无支撑结构和/或不能形成所需薄度的涂层的限制。 基于层比较的数据处理技术被用于控制曝光，以便在至少一些横截面的至少部分上延迟材料的固化，直到沉积更高层的材料，以便允许下层的特征 物体位于建筑材料的深度上，其等于或超过可以有效地用于固化这些特征的最小固化深度。 在尝试凝固下一层之前，使用类似的数据操作来确保存在最小可靠的涂层厚度，以上固化的材料。 此外，使用水平比较技术来提供用于形成物体的增强的横截面数据。 此外，描述了通过操纵三维对象表示来自动执行Z误差校正的几种技术。

    Selective deposition modeling materials and method
    10.
    发明授权
    Selective deposition modeling materials and method 失效
    选择性沉积建模材料

    公开(公告)号：US6133355A

    公开(公告)日：2000-10-17

    申请号：US873389

    申请日：1997-06-12

    申请人： Richard N. Leyden ,  Charles W. Hull ,  Dinh Ton That

    发明人： Richard N. Leyden ,  Charles W. Hull ,  Dinh Ton That

    IPC分类号： B29C35/08 ,  B29C41/02 ,  C08K5/04

    CPC分类号： B29C67/0059

    摘要： A novel thermopolymer material adapted for use in thermal stereolithography. More particularly, a thermopolymer material comprising a mixture of: a low shrinkage polymer resin; a low viscosity material such as paraffin wax; at least one microcrystalline wax; a toughening polymer; a plasticizer. Alternative embodiments further include components to improve the materials ability to transfer heat and to improve strength. The subject material, together with the described process greatly reduce part building distortions while retaining desirable toughness, strength and jetting properties.

    摘要翻译： 适用于热立体光刻的新型热聚合物材料。 更具体地，涉及一种包含以下混合物的热聚合物材料：低收缩率聚合物树脂; 低粘度物质如石蜡; 至少一种微晶蜡; 增韧聚合物; 增塑剂。 替代实施例还包括提高材料转移热能力和提高强度的组件。 主题材料与所描述的方法一起大大减少了部件构造的变形，同时保持了所需的韧性，强度和喷射性能。