公开(公告)号：US5248456A

公开(公告)日：1993-09-28

申请号：US702030

申请日：1991-05-17

申请人： Herbert E. Evans, Jr. ,  Ernest W. Ertley ,  Charles W. Hull ,  Richard N. Leyden

发明人： Herbert E. Evans, Jr. ,  Ernest W. Ertley ,  Charles W. Hull ,  Richard N. Leyden

IPC分类号： B29C67/00 ,  B29C71/00 ,  B29C71/04 ,  B29C35/08 ,  B29C41/02

CPC分类号： B29C67/0066 ,  B29C67/0096 ,  B29C71/0009 ,  B29C71/04 ,  B29K2995/0073 ,  Y10T156/17

摘要： An improved stereolithographic apparatus and method is described. In one embodiment, the improvement includes immersing at least a portion of a part in a volume of a liquid solvent in a vapor degreaser while subjecting the portion to ultrasonic agitation to substantially remove excess resin. Several examples of solvents are provided, including ethanol, and Freon TMS. In a second embodiment, the improvement includes building the part on a layer of liquid resin supported by a volume of a dense, immiscible, and UV transparent intermediate liquid, and integratably immersing at least a portion of the built part in the intermediate liquid, and then either subjecting the immersed portion to ultrasonic agitation to substantially remove excess resin, or subjecting the immersed portion to UV light. Several examples of intermediate liquids are provided, including perfluorinated fluids, such as Fluorinert FC-40, and water-based salt solutions, such as solutions of magnesium sulfate or sodium chloride in water.

摘要翻译： 描述了一种改进的立体光刻设备和方法。 在一个实施方案中，改进包括将部分液体溶剂的体积的至少一部分浸入蒸气脱脂剂中，同时使该部分进行超声波搅拌以基本上除去多余的树脂。 提供了几种溶剂实例，包括乙醇和氟利昂TMS。 在第二实施例中，改进包括在由一定体积的致密的，不混溶的和UV透明的中间液体支撑的液体树脂层上构建部件，并将内置部件的至少一部分可整合地浸入中间液体中，以及 然后将浸渍部分进行超声波搅拌以基本上除去多余的树脂，或者使浸入的部分经受UV光。 提供了中间液体的几个实例，包括全氟化流体，例如Fluorinert FC-40，以及水基盐溶液，例如硫酸镁或氯化钠在水中的溶液。

公开(公告)号：US5209878A

公开(公告)日：1993-05-11

申请号：US605979

申请日：1990-10-30

申请人： Dennis R. Smalley ,  Hop D. Nguyen ,  Kris A. Schmidt ,  Herbert E. Evans ,  Ray S. Freed ,  Paul J. Jacobs

发明人： Dennis R. Smalley ,  Hop D. Nguyen ,  Kris A. Schmidt ,  Herbert E. Evans ,  Ray S. Freed ,  Paul J. Jacobs

IPC分类号： B29C67/00

CPC分类号： B29C67/0088 ,  G05B2219/49013 ,  G05B2219/49019

摘要： Methods and apparatus for reducing surface discontinuities, resulting from the formation of a three-dimensional object out of a plurality of stacked layers, during layer by layer stereolithographic formation of the three-dimensional object. The discontinuities between layers are reduced by utilizing formation and solidification of thin fill layers near the edges of thicker structural layers or by utilizing surface tension effects to smooth discontinuities between the structural layers by formation of meniscuses of building material and solidifying the meniscuses.

摘要翻译： 在逐层立体光刻形成三维物体的过程中，减少由多层叠层形成三维物体所导致的表面不连续性的方法和装置。 通过利用在较厚结构层的边缘附近的薄填充层的形成和固化，或通过利用表面张力效应来平滑结构层之间的不连续性，通过形成建筑材料的混凝土并固化薄板来降低层之间的不连续性。