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    • 5. 发明授权
    • Method and apparatus for stereolithographically forming three dimensional objects with reduced distortion
    • 用于立体光刻形成具有减小的变形的三维物体的方法和装置
    • US06399010B1
    • 2002-06-04
    • US09246504
    • 1999-02-08
    • Michelle D. GuertinCharles W. HullHop D. Nguyen
    • Michelle D. GuertinCharles W. HullHop D. Nguyen
    • B29C3508
    • G05B19/4099B29C64/135B33Y10/00B33Y30/00
    • A rapid prototyping and manufacturing (e.g. stereolithography) method and apparatus for making three-dimensional objects on a layer-by-layer basis by selectively exposing layers of material to prescribed synergistic stimulation including forming portions of a lamina using a first exposure, allowing a time delay, and then applying a second exposure. The time delay is sufficient to allow shrinkage of the material to occur that results from the first exposure. It is preferred that the solidified portion resulting from the first exposure does not adhere to the previously formed lamina. It is also preferred that the portion solidified by this first exposure does not adhere to any boundary region that may have been exposed and adhered to the previously formed lamina. The time delay associated with a given cross-sectional region may be occupied by exposing other cross-sectional regions. The delay may occur between two exposures of overlaying hatch or fill vectors. The delay may alternatively occur between exposure of hatch vectors and boundary vectors. The time delay may be determined by a clock, or alternatively, the time delay may be considered to have lapsed upon certain physical conditions being met, such as detecting the amount of shrinkage and determining that it has progressed far enough for the second exposure to occur.
    • 通过选择性地将材料层暴露于规定的协同刺激(包括使用第一曝光形成薄片的部分)来逐层地制造三维物体的快速原型制造(例如立体光刻)方法和装置,允许时间 延迟,然后应用第二次曝光。 时间延迟足以使第一次曝光产生的材料收缩。 优选的是,由第一次曝光产生的凝固部分不粘附到先前形成的层。 还优选的是,通过该第一曝光固化的部分不粘附到可能已经暴露并粘附到先前形成的层的任何边界区域。 与给定横截面区域相关联的时间延迟可以通过暴露其它横截面区域来占据。 延迟可能发生在覆盖舱口或填充向量的两次曝光之间。 延迟可以可选地在阴影向量和边界向量的曝光之间发生。 时间延迟可以由时钟确定,或者替代地,可以认为在某些物理条件被满足时已经失效的时间延迟,例如检测收缩量并确定其已经进行到足以使第二次暴露发生 。
    • 6. 发明授权
    • Simplified stereolithographic object formation methods of overcoming minimum recoating depth limitations
    • 克服最小重涂深度限制的简化立体光刻物体形成方法
    • US06179601B2
    • 2001-01-30
    • US09307935
    • 1999-05-10
    • Theodore R. KrugerChris R. MannersHop D. Nguyen
    • Theodore R. KrugerChris R. MannersHop D. Nguyen
    • B29C3508
    • B29C41/36B29C41/12B29C64/124B29C64/40B33Y10/00B33Y40/00
    • A rapid prototyping and manufacturing (e.g. stereolithography) method and apparatus for making high resolution objects utilizing low resolution materials which are limited by their inability to reliably form coatings of a desired thickness. The formation of coatings of such materials is limited to a Minimum Recoating Depth (MRD), when formed over entirely solidified laminae, which is thicker than the desired layer thickness or object resolution. Data manipulation techniques result in layers of material (and laminae) of the object being categorized as non-consecutive primary layers (laminae) and secondary layers (laminae) positioned intermediate to the primary layers (laminae). Substantially, all portions of primary laminae are exposed in association with primary layers and portions of the secondary laminae are formed in association with their respective secondary layers while other portions of the secondary laminae are formed in association with primary layers so as to form the object with a higher resolution than that dictated by the spacing between the primary layers. Recoating techniques are described which can be used when the thickness between consecutive layers is less than a leading edge bulge phenomena that results from the use of a particular recoating device such that direction of sweeping and/or order of sweeping of the recoating device is varied between consecutive primary layers.
    • 用于利用低分辨率材料制造高分辨率物体的快速成型和制造(例如立体光刻)方法和装置,其受到不能可靠地形成期望厚度的涂层的限制。 这种材料的涂层的形成被限制在最小再沉积深度(MRD)时,当在完全凝固的层上形成时,该厚度比所需的层厚度或物体分辨率厚。 数据处理技术导致被分类为非连续主层(层)的物体层(和层)层以及位于主层(层)之间的二层(层)。 基本上,初级层的所有部分与主层相关联地暴露,并且次级层的部分与它们各自的次层相关联地形成,而次层的其它部分与主层相关联地形成以形成物体, 分辨率高于主层之间间距所规定的分辨率。 描述了当连续层之间的厚度小于由使用特定重涂装置引起的前缘凸起现象时,可使用再现技术,使得重涂装置的扫掠方向和/或扫描顺序在 连续的主要层。
    • 7. 发明授权
    • Stereolithographic method and apparatus for production of three
dimensional objects using recoating parameters for groups of layers
    • 用于使用层的重涂参数生产三维物体的立体光刻方法和装置
    • US6103176A
    • 2000-08-15
    • US248351
    • 1999-02-08
    • Hop D. NguyenChris R. Manners
    • Hop D. NguyenChris R. Manners
    • B29C67/00B29C41/12B29C41/36G05B19/4099B29C35/08B29C41/02
    • B29C41/12B29C41/36B29C67/0062B29C67/0092
    • A rapid prototyping and manufacturing (e.g. stereolithography) method and apparatus for making three-dimensional objects with enhanced control of coating parameters used when forming layers of liquid or other fluid-like material in preparation for forming laminae of the object. The each lamina of the object is treated as either a primary laminae or secondary laminae. Only minority portions of the secondary layers are solidified when their associated layers are formed. Primary laminae are solidified in majority portions, along with previously unsolidified portions of secondary lamina, when their associated layers are formed. Recoating parameters are supplied for groups of primary layers and secondary layers such that coating formation may be controlled differently for primary layers and for secondary layers. Coating control for secondary layers may be based on the position of individual secondary layers, or sets of secondary layers, relative to the primary layers. The enhanced control leads to (1) more accurate layer formation, and/or (2) faster layer formation times for groups of successive layers.
    • 快速成型和制造(例如立体光刻)方法和装置,用于在制备用于形成物体的层的液体或其它类似流体的材料层时,增强对涂层参数的控制。 物体的每个层被视为主层或次层。 当形成它们的相关层时,只有少部分二级层被固化。 当形成相关层时,主层与主层的先前未固化的部分一起多数固化。 为初级层和次级层的组提供了再生参数,使得对初级层和次级层可以不同地控制涂层形成。 次级层的涂层控制可以基于相对于初级层的单个二级层或二级层的位置。 增强的控制导致(1)更准确的层形成,和/或(2)连续层组更快的层形成时间。
    • 8. 发明授权
    • Vibrationally enhanced stereolithographic recoating
    • 振动增强立体显微镜重涂
    • US5693144A
    • 1997-12-02
    • US384383
    • 1995-02-03
    • Paul F. JacobsJ. Scot ThompsonHop D. NguyenDennis R. Smalley
    • Paul F. JacobsJ. Scot ThompsonHop D. NguyenDennis R. Smalley
    • B29C41/12B29C67/00B05C3/00
    • B29C67/0085B29C41/12B29C2791/008B29K2995/0073
    • Methods and apparatus for providing a vibrational enhancement to the recoating process in stereolithography are disclosed. The formation of a thin layer of building material over a previous layer of structure of a partially completed three-dimensional object, in preparation for formation of an additional layer of structure, is enhanced by the use of vibrational energy imparted to the building medium. In a first preferred apparatus, vibration is induced into the surface of the material by a plurality of vibrating needles that penetrate below the working surface to a sufficient depth to ensure adequate coupling but not deep enough to come into contact with the surface of the partially completed part. In a second preferred apparatus, vibration is coupled directly to the object support. The vibrational energy is then transmitted through the part to the surface of the building material. In a first preferred method the partially completed object is overcoated with material and vibration is used to reduce the coating thickness. In a second preferred method, the partially completed object is undercoated with material and vibration is used to increase the coating thickness.
    • 公开了用于在立体光刻技术中对重涂过程提供振动增强的方法和装置。 通过使用施加到建筑物介质上的振动能来增强在部分完成的三维物体的先前的结构层上形成薄层的建筑材料以准备形成额外的结构层。 在第一优选装置中,通过多个振动针将多个振动针刺入到工作表面下方的振动,使其振动到足够的深度,以确保足够的耦合但不足够深以与部分完成的表面接触 部分。 在第二优选装置中,振动被直接耦合到物体支撑件上。 振动能量然后通过部件传递到建筑材料的表面。 在第一优选方法中,部分完成的物体用材料覆盖,并且使用振动来减小涂层厚度。 在第二优选方法中,部分完成的物体用材料底涂,并且使用振动来增加涂层厚度。
    • 10. 发明授权
    • Vibrationally enhanced stereolithographic recoating
    • 振动增强立体显微镜重涂
    • US5688464A
    • 1997-11-18
    • US405812
    • 1995-03-16
    • Paul F. JacobsJ. Scot ThompsonHop D. NguyenDennis R. Smalley
    • Paul F. JacobsJ. Scot ThompsonHop D. NguyenDennis R. Smalley
    • B29C41/12B29C67/00B29C35/08B29C41/02
    • B29C67/0085B29C41/12B29C2791/008B29K2995/0073
    • Methods and apparatus for providing a vibrational enhancement to the recoating process in stereolithography are disclosed. The formation of a thin layer of building material over a previous layer of structure of a partially completed three-dimensional object, in preparation for formation of an additional layer of structure, is enhanced by the use of vibrational energy imparted to the building medium. In a first preferred apparatus, vibration is induced into the surface of the material by a plurality of vibrating needles that penetrate below the working surface to a sufficient depth to ensure adequate coupling but not deep enough to come into contact with the surface of the partially completed part. In a second preferred apparatus, vibration is coupled directly to the object support. The vibrational energy is then transmitted through the part to the surface of the building material. In a first preferred method the partially completed object is overcoated with material and vibration is used to reduce the coating thickness. In a second preferred method, the partially completed object is under-coated with material and vibration is used to increase the coating thickness.
    • 公开了用于在立体光刻技术中对重涂过程提供振动增强的方法和装置。 通过使用施加到建筑物介质上的振动能来增强在部分完成的三维物体的先前的结构层上形成薄层的建筑材料以准备形成额外的结构层。 在第一优选装置中,通过多个振动针将多个振动针刺入到工作表面下方的振动,使其振动到足够的深度,以确保足够的耦合但不足够深以与部分完成的表面接触 部分。 在第二优选装置中,振动被直接耦合到物体支撑件上。 振动能量然后通过部件传递到建筑材料的表面。 在第一优选方法中,部分完成的物体用材料覆盖,并且使用振动来减小涂层厚度。 在第二优选方法中,部分完成的物体涂覆有材料,并且使用振动来增加涂层厚度。