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    21.
    发明专利
    未知

    公开(公告)号：DE602005017989D1

    公开(公告)日：2010-01-14

    申请号：DE602005017989

    申请日：2005-06-10

    Applicant: 3D SYSTEMS INC

    Inventor： CHUNG TAE MARK ,  PARTANEN JOUNI P

    IPC: B29C67/00 ,  B23K26/34 ,  B29C35/08 ,  G01J5/52

    Abstract: An apparatus and a method of using the apparatus wherein a radiation emitter (140) is positioned adjacent a sensor means (142,144,145) within a process chamber (102) in a laser sinter system (100) that emits radiation to the sensor means and a calibration means receives readings from the sensor means (142,144,145) to compare temperature sensings received from the sensor means with set emission signals from the radiation emitter (140) to adjust the temperature sensings to thereby calibrate the sensor means during the forming of a three-dimensional article. The calibration is done repeatedly during the build process of the three-dimensional article (Fig. 1).

    Controlled densification of fusible powders in laser sintering
    22.
    发明专利
    Controlled densification of fusible powders in laser sintering 未知

    公开(公告)号：GB2421003B

    公开(公告)日：2009-12-09

    申请号：GB0523280

    申请日：2005-11-15

    Applicant: 3D SYSTEMS INC

    Inventor： RUATTA STEPHEN A ,  MOUSSA KHALIL M

    IPC: B29C67/00 ,  C23C24/10 ,  C23C26/02

    Abstract: The invention relates to a method producing parts using laser sintering wherein a fusible powder is exposed to a plurality of laser scans at controlled energy levels and for time periods to melt and densify the powder and in the substantial absence of particle bonding outside the fusion boundary. Strength is improved up to 100% compared to previous methods. An example includes a relatively high energy initial scan to melt the powder followed by lower energy scans controlled to densify the melt and separated in time to dissipate heat to the surrounding part cake. The rate and extent to which the powder particles are fused together can be controlled so that each successive scan can be used to fuse the particles together in discreet incremental steps. As a result, the final dimensions of the part and its density and mechanical properties can be improved compared to conventional methods and part growth avoided.

    23.
    发明专利
    未知

    公开(公告)号：FR2878771B1

    公开(公告)日：2009-05-29

    申请号：FR0512351

    申请日：2005-12-06

    Applicant: 3D SYSTEMS INC

    Inventor： RUATTA STEPHEN A ,  MOUSSA KHALIL M

    IPC: B22F3/105 ,  B23K26/34 ,  B29C67/00 ,  C23C24/08 ,  C23C24/10 ,  C23C26/02

    Abstract: The invention relates to a method producing parts using laser sintering wherein a fusible powder is exposed to a plurality of laser scans at controlled energy levels and for time periods to melt and densify the powder and in the substantial absence of particle bonding outside the fusion boundary. Strength is improved up to 100% compared to previous methods. An example includes a relatively high energy initial scan to melt the powder followed by lower energy scans controlled to densify the melt and separated in time to dissipate heat to the surrounding part cake. The rate and extent to which the powder particles are fused together can be controlled so that each successive scan can be used to fuse the particles together in discreet incremental steps. As a result, the final dimensions of the part and its density and mechanical properties can be improved compared to conventional methods and part growth avoided.

    24.
    发明专利
    未知

    公开(公告)号：AT426185T

    公开(公告)日：2009-04-15

    申请号：AT06075138

    申请日：2001-11-02

    Applicant: 3D SYSTEMS INC

    Inventor： PARTANEM JOUNI P ,  TANG NANSHENG ,  WU XINGKUN

    IPC: G02B27/09 ,  G03F7/20 ,  B23K26/04 ,  B23K26/06 ,  B23K26/067 ,  B23K26/073 ,  B29C67/00 ,  G02B7/10 ,  G02B27/40 ,  G11B7/125 ,  G11B7/135

    Abstract: An illumination system includes optics capable of adjusting the size of a beam of light and adjusting the focus of the beam of light. Spot size control optics adjusts the overall size of the beam of light and separately adjusts the ellipticity of the beam, primarily in one dimension. Light from the spot size control optics passes to focus control optics that control the overall focus of the beam of light and adjust the astigmatism of the beam by altering the focus position of the beam of light in one dimension. The laser system, the spot size control optics and the focus control optics are within an enclosure. Actuators under remote control from outside of the enclosure adjust both of the spot size control optics and focus control optics in the thermal environment of the illumination system.

    30.
    发明专利
    未知

    公开(公告)号：DE60031317T2

    公开(公告)日：2007-05-31

    申请号：DE60031317

    申请日：2000-02-08

    Applicant: 3D SYSTEMS INC

    Inventor： NGUYEN HOP D ,  MANNERS CHRIS R

    IPC: B29C67/00 ,  B29C41/12 ,  B29C41/36 ,  G05B19/4099

    Abstract: 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. Then each lamina (201-220) of the object is treated as either a primary laminae (P) or secondary laminae (S). Only minority portions of the secondary layers (S) are solidified when their associated layers are formed. Primary laminae (P) 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 (P) and secondary layers (S) 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.

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