Recoating system for using high viscosity build materials in solid freeform fabrication
    3.
    发明申请
    Recoating system for using high viscosity build materials in solid freeform fabrication 失效
    在固体自由形成中使用高粘度构建材料的再生系统

    公开(公告)号:US20020195747A1

    公开(公告)日:2002-12-26

    申请号:US10052506

    申请日:2002-01-17

    Abstract: A method of applying highly viscous paste-like build materials in layers in a solid freeform fabrication apparatus to form three-dimensional objects. A viscosity modifier is first introduced into the build material to establish a low viscosity state and then the material is dispensed in layers on a working surface. The viscosity modifier is then removed from the build material preferably by evaporation, and the layer is selectively solidified to form the three-dimensional object. The method substantially eliminates the undesirable effects of induced shear stress imposed on lower layers when attempting to apply uniform layers of highly viscous materials in solid freeform fabrication techniques. The method allows for the use of highly viscous paste-like materials that can include upwards of 50% by weight of metallic, ceramic, mineral, or polymer powders. Preferably the binder is a photocurable resin or thermocurable material which is selectively solidified to form the three-dimensional objects.

    Abstract translation: 一种在固体自由形成制造装置中在层中施加高粘度糊状构建材料以形成三维物体的方法。 首先将粘度调节剂引入构建材料中以建立低粘度状态,然后将材料分层分散在工作表面上。 然后优选通过蒸发从构建材料中除去粘度调节剂,并且该层选择性地固化以形成三维物体。 当试图在固体自由形成制造技术中施加均匀的高粘度材料层时,该方法基本上消除了施加在较低层上的诱导剪切应力的不期望的影响。 该方法允许使用高粘度的糊状材料,其可以包含高达50重量%的金属,陶瓷,矿物或聚合物粉末。 优选地,粘合剂是可光固化树脂或可热固化材料,其被选择性地固化以形成三维物体。

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