Molding method, apparatus, and device including use of powder metal technology for forming a molding tool with thermal control elements
    13.
    发明授权
    Molding method, apparatus, and device including use of powder metal technology for forming a molding tool with thermal control elements 失效
    成型方法,装置和装置,包括使用粉末金属技术形成具有热控制元件的模制工具

    公开(公告)号:US06224816B1

    公开(公告)日:2001-05-01

    申请号:US09156512

    申请日:1998-09-17

    IPC分类号: B29C3304

    摘要: Tool having a molding surface is formed from a flowable material (e.g., powder material) wherein the shape of molding surface is formed from a molding process using a master pattern having a surface with a shape substantially the same as the shape of the molding surface to be formed. The tool has at least one thermal control element located within it and spaced from the molding surface where a component used in forming the thermal control element is located within the flowable material prior to solidifying the material. The powder material is preferably a mixture of metals. The thermal control elements include fluid flow paths, heating elements, temperature sensors, and the like.

    摘要翻译: 具有模制表面的工具由可流动的材料(例如,粉末材料)形成,其中模制表面的形状由使用具有与模制表面的形状基本相同的形状的表面的母模的模制工艺形成, 形成。 该工具具有至少一个热控制元件,其位于其内并与模制表面间隔开,其中用于形成热控制元件的部件在固化材料之前位于可流动材料内。 粉末材料优选是金属的混合物。 热控制元件包括流体流动路径,加热元件,温度传感器等。

    Methods of coating stereolithographic parts
    14.
    发明授权
    Methods of coating stereolithographic parts 失效
    涂布立体光刻部件的方法

    公开(公告)号:US5234636A

    公开(公告)日:1993-08-10

    申请号:US929463

    申请日:1992-08-13

    摘要: Methods of coating stereolithographic parts and smoothing over characteristic surface discontinuities having alternating recesses and peaks. A stereolithographic part is first substantially covered with a substance capable of becoming less viscous when heated at a temperature which does not substantially thermally degrade the part, wherein the heated substance has an appropriate surface tension. Then, the substance is heated to that temperature until the substance flows preferentially into the recesses of the surface discontinuities and away from the peaked surface discontinuities. The substance will thereafter form a short surface connection over the recesses of the discontinuities through the surface tension of the heated substance. The substance is then polymerized or hardened either by cooling, thermally setting or by UV curing.

    摘要翻译: 涂覆立体光刻部件并平滑具有交替凹陷和峰值的特征表面不连续性的方法。 首先,立体光刻部件基本上被能够在基本上不降解该部件的温度下加热时变得粘度较低的物质覆盖,其中加热的物质具有适当的表面张力。 然后,物质被加热到该温度,直到物质优先流入表面不连续部分的凹陷中并远离峰值表面不连续性。 此后物质将通过加热物质的表面张力在不连续部分的凹陷处形成短的表面连接。 然后通过冷却,热固化或通过UV固化将物质聚合或硬化。

    Method for selective deposition modeling
    15.
    发明授权
    Method for selective deposition modeling 失效
    选择性沉积建模方法

    公开(公告)号:US5855836A

    公开(公告)日:1999-01-05

    申请号:US876695

    申请日:1997-06-12

    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。

    Method and apparatus for cleaning stereolithographically produced objects
    16.
    发明授权
    Method and apparatus for cleaning stereolithographically produced objects 失效
    用于清洁立体生成物体的方法和装置

    公开(公告)号:US5248456A

    公开(公告)日:1993-09-28

    申请号:US702030

    申请日:1991-05-17

    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。