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公开(公告)号：BR9610663A
公开(公告)日：1999-07-13
申请号：BR9610663
申请日：1996-09-27
Applicant: 3D SYSTEMS INC
Inventor： EARL JOCELYN M , MANNERS CHRIS R , KEREKES THOMAS A , MARYGOLD PAUL H , THAYER JEFFREY S
Abstract: A three-dimensional object is formed by selectively depositing successive layers (14) of build material from a print-head (9) having a plurality of orifices or nozzles (10(1)-10(96)), such as an ink-jet type of print-head. The print-head (9) is moved (X-Y control) relative to a support platform (15) in a series of scans in the X-direction offset from one another in the Y-direction and possibly overlapping. The orifices (10(1)-10(96)) extend transversely of the scan X-direction and may be set at an angle (α) to it to control the resolution perpendicular to the scan direction. The platform (15) is movable relative to the print-head in the Z-direction for forming each successive layer (14). The build material is a flowable material and may be a radiation-curable material, such as an ultra-violet curable photo-polymer. The data according to which each layer is formed may be manipulated according to a selected build style to determine the selective activation of the print-head orifices.
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公开(公告)号：AU2365595A
公开(公告)日：1995-11-16
申请号：AU2365595
申请日：1995-04-25
Applicant: 3D SYSTEMS INC
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公开(公告)号：WO9529053A3
公开(公告)日：1996-01-18
申请号：PCT/US9505148
申请日：1995-04-25
Applicant: 3D SYSTEMS INC
Inventor： GIGL JOHN J , PANG THOMAS H , SMALLEY DENNIS R , ALLEN KERRY J , VORGITCH THOMAS J , MANNERS CHRIS R , EARL JOCELYN M , BEDAL BRYAN J L , JACOBS PAUL F , NGUYEN HOP D , LEYDEN RICHARD N , HULL CHARLES W , VANDORIN STACIE L
CPC classification number: G06T17/00 , B29C64/135 , B29C64/40
Abstract: A method and apparatus for making high resolution objects by stereolithography utilizing low resolution materials which are limited by their inability to form unsupported structures of desired thinness and/or their inability to form coatings of desired thinness. Data manipulation techniques, based on layer comparisons, are used to control exposure in order to delay solidification of the material on at least portions of at least some cross-sections until higher layers of material are deposited so as to allow down-facing features of the object to be located at a depth in the building material which is equal to or exceeds a minimum cure depth that can effectively be used for solidifying these features. Similar data manipulations are used to ensure minimum reliable coating thicknesses exist, above previously solidified material, before attempting solidification of a next layer. In addition, horizontal comparison techniques are used to provide enhanced cross-sectional data for use in forming the object. Further, several techniques for automatically performing Z-error correction through the manipulation of a three-dimensional object representation are described. Still further, techniques for producing objects useful for investment casting applications are described, including techniques allowing for the drainage of unsolidified material. A method and apparatus for the automatic generation of vents and drain is also provided.
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公开(公告)号：DE602006011802D1
公开(公告)日：2010-03-11
申请号：DE602006011802
申请日：2006-03-20
Applicant: 3D SYSTEMS INC
Inventor： HULL CHARLES W , PARTANEN JOUNI P , SPERRY CHARLES R , DUNNE PATRICK , SCOTT SUZANNE M , MCNAMARA DENNIS F , MANNERS CHRIS R
Abstract: A solid imaging method employing sub-pixel shifting in multiple exposures of the digitally light projected image of a cross-section of a three-dimensional object on a solidifiable liquid medium. The multiple exposures provide increased resolution, preserving image features in a three-dimensional object and smoothing out rough or uneven edges that would otherwise occur using digital light projectors that are limited by the number of pixels in an image projected over the size of the image. Algorithms are used to select pixels to be illuminated within the boundary of each image projected in the cross-section being exposed.
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公开(公告)号：DE60122219T2
公开(公告)日：2007-08-23
申请号：DE60122219
申请日：2001-01-09
Applicant: 3D SYSTEMS INC
Inventor： KULKARNI RAJEEV B , MANNERS CHRIS R
Abstract: A stereolithographic process for forming three-dimensional objects using an improved support structure is disclosed. The support structure (28) is formed by using differential curing of the liquid media material to form solid supports with weak points (21, 24, 39) at selected locations to facilitate support removal from a three-dimensional object (22, 25) and minimize post-processing.
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Patent Agency Ranking
公开(公告)号：DE60214089T2
公开(公告)日：2007-04-12
申请号：DE60214089
申请日：2002-06-24
Applicant: 3D SYSTEMS INC
Inventor： NGUYEN HOP D , MOUSSA KHALIL M , MANNERS CHRIS R
IPC: B29C67/00
Abstract: A method and an apparatus for forming a three-dimensional object in layerwise fashion by selectively solidifying a build material is disclosed. The invention is applicable to stereolithography involving layer-by-layer photocuring of a fluid photopolymer by radiation such as ultra-violet light. Data for performing the stereolithography is based on CAD data. A main part area (10) is solidified, followed by a delay or pause for a desired period of time to permit shrinkage to occur, and then, in multiple drawings (13,17) of the main part borders, solidifies the borders from the portion closest to the main part (10) outwardly to final border (15) farthest from the main part which is the true CAD boundary.
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公开(公告)号：DE60214089D1
公开(公告)日：2006-10-05
申请号：DE60214089
申请日：2002-06-24
Applicant: 3D SYSTEMS INC
Inventor： NGUYEN HOP D , MOUSSA KHALIL M , MANNERS CHRIS R
IPC: B29C67/00
Abstract: A method and an apparatus for forming a three-dimensional object in layerwise fashion by selectively solidifying a build material is disclosed. The invention is applicable to stereolithography involving layer-by-layer photocuring of a fluid photopolymer by radiation such as ultra-violet light. Data for performing the stereolithography is based on CAD data. A main part area (10) is solidified, followed by a delay or pause for a desired period of time to permit shrinkage to occur, and then, in multiple drawings (13,17) of the main part borders, solidifies the borders from the portion closest to the main part (10) outwardly to final border (15) farthest from the main part which is the true CAD boundary.
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公开(公告)号：DE69628348T2
公开(公告)日：2004-06-09
申请号：DE69628348
申请日：1996-09-27
Applicant: 3D SYSTEMS INC
Inventor： EARL JOCELYN M , MANNERS CHRIS R , KEREKES THOMAS A , MARYGOLD PAUL H , THAYER JEFFREY S
Abstract: A three-dimensional object is formed by selectively depositing successive layers (14) of build material from a print-head (9) having a plurality of orifices or nozzles (10(1)-10(96)), such as an ink-jet type of print-head. The print-head (9) is moved (X-Y control) relative to a support platform (15) in a series of scans in the X-direction offset from one another in the Y-direction and possibly overlapping. The orifices (10(1)-10(96)) extend transversely of the scan X-direction and may be set at an angle (α) to it to control the resolution perpendicular to the scan direction. The platform (15) is movable relative to the print-head in the Z-direction for forming each successive layer (14). The build material is a flowable material and may be a radiation-curable material, such as an ultra-violet curable photo-polymer. The data according to which each layer is formed may be manipulated according to a selected build style to determine the selective activation of the print-head orifices.
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公开(公告)号：AT228927T
公开(公告)日：2002-12-15
申请号：AT96936016
申请日：1996-09-27
Applicant: 3D SYSTEMS INC
Inventor： EARL JOCELYN M , MANNERS CHRIS R , KEREKES THOMAS A , MARYGOLD PAUL H , THAYER JEFFREY S
Abstract: A three-dimensional object is formed by selectively depositing successive layers (14) of build material from a print-head (9) having a plurality of orifices or nozzles (10(1)-10(96)), such as an ink-jet type of print-head. The print-head (9) is moved (X-Y control) relative to a support platform (15) in a series of scans in the X-direction offset from one another in the Y-direction and possibly overlapping. The orifices (10(1)-10(96)) extend transversely of the scan X-direction and may be set at an angle (α) to it to control the resolution perpendicular to the scan direction. The platform (15) is movable relative to the print-head in the Z-direction for forming each successive layer (14). The build material is a flowable material and may be a radiation-curable material, such as an ultra-violet curable photo-polymer. The data according to which each layer is formed may be manipulated according to a selected build style to determine the selective activation of the print-head orifices.
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公开(公告)号：AU7481898A
公开(公告)日：1998-12-08
申请号：AU7481898
申请日：1998-05-12
Applicant: 3D SYSTEMS INC
Inventor： MANNERS CHRIS R , SMALLEY DENNIS R
Abstract: This invention relates to the stepwise layer-by-layer formation of a three-dimensional object through application of the principles of stereolithography and to the automatic detection of surface features of each layer of a three-dimensional object to manufacture parts more reliably, more accurately and more quickly. Automatic detection of trapped volume regions and size of solidified cross-sectional regions are disclosed. Automatic selection of recoating styles is made based on(1) the detected regions, (2) empirically or otherwise determined optimum recoating styles for different types of regions, and (3) a look-up table, other correlation system, or processor for associating recoating style information with laminae containing particular identified regions.
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