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公开(公告)号：JPH04506039A
公开(公告)日：1992-10-22
申请号：JP50850189
申请日：1989-04-17
Applicant: 3D SYSTEMS INC
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公开(公告)号：JP2963478B2
公开(公告)日：1999-10-18
申请号：JP50850189
申请日：1989-04-17
Applicant: 3D SYSTEMS INC
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公开(公告)号：JP2000000893A
公开(公告)日：2000-01-07
申请号：JP16677199
申请日：1999-06-14
Applicant: 3D SYSTEMS INC , 3 D SYSTEMS INC
Inventor： HULL CHARLES WILLIAM , LEWIS CHARLES WILLIAM , FREED RAYMOND SAMUEL , SPENCE STUART THOMAS , VINSON WAYNE ALLAN , SMALLEY DENNIS ROLLETTE , HULL CHARLES W , SPENCE STUART T , LEWIS CHARLES W , VINSON WAYNE B , WAYNE S FRED , SMALLEY DENNIS R
Abstract: PROBLEM TO BE SOLVED: To perform the automatic designing economically with rapidity and high reliability by providing a step to partially change stored sets of data for defining the solid part of the shape of an object and coverting the solid part into a part consisting of a region where it is cured or a region where it is maintained in an uncured state according to each of exposure levels. SOLUTION: When a design displayed on the output image screen of a computer is satisfactory, parts are manufactured and when the design needs to be corrected, a change is repeatedly made through the computer. In this case, a pattern for stimulating each of many superposed thin layers 30a, 30b, 30c of a transferable fluid medium 22 is changed partially in a data processing step 25. Further, alteration data for converting the solid part to the part comprising a region where it is cured according to a first exposure level and a region where it is cured according to a second lower exposure level or a region where it is maintained in an uncured state while each of the thin layers 30a, 30b, 30c is initially formed, is created.
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公开(公告)号：DE68929542D1
公开(公告)日：2006-01-19
申请号：DE68929542
申请日：1989-04-17
Applicant: 3D SYSTEMS INC
Inventor： HULL CHARLES WILLIAM , SPENCE STUART THOMAS , ALBERT DAVID J , SMALLEY DENNIS ROLLETTE , HARLOW RICHARD A , STEINBURGH PHILIP , TARNOFF HARRY L , NGUYEN HOP D , LEWIS CHARLES WILLIAM , VORGITCH TOM J , REMBA DAVID Z
IPC: B29C35/08 , B29C67/00 , B29K105/24 , G01J1/42 , G03C9/08 , G03F7/00 , G03F7/20 , G06F17/50 , G06T17/00 , G06T17/10 , G06T17/20
Abstract: An improved stereolithography system for generating a three-dimensional object by creating a cross-sectional pattern of the object to be formed at a selected surface of a fluid medium capable of altering its physical state in response to appropriate synergistic stimulation by impinging radiation, particle bombardment or chemical reaction, information defining the object being specially processed to reduce curl and distortion, and increase resolution, strength, accuracy, speed and economy of reproduction even for rather difficult object shapes, the successive adjacent laminae, representing corresponding successive adjacent cross-sections of the object, being automatically formed and integrated together to provide a step-wise laminar buildup of the desired object, whereby a three-dimensional object is formed and drawn from a substantially planar surface of the fluid medium during the forming process. The conversion of CAD/CAM data descriptive of the object into stereolithographic data used to trace cross-sections of the object is described.
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Patent Agency Ranking
公开(公告)号：DE355945T1
公开(公告)日：1996-06-27
申请号：DE89303785
申请日：1989-04-17
Applicant: 3D SYSTEMS INC
Inventor： SMALLEY DENNIS ROLLETTE
Abstract: An improved stereolithography system for generating a three-dimensional object by creating a cross-sectional pattern of the object to be formed at a selected surface of a fluid medium capable of altering its physical state in response to appropriate synergistic stimulation by impinging radiation, particle bombardment or chemical reaction, using information defining the object which is specially processed to reduce curl, stress, birdnesting and other distortions, the successive adjacent laminae, representing corresponding successive adjacent cross-sections of the object, being automatically formed and integrated together to provide a step-wise laminar buildup of the desired object, whereby a three-dimensional object is formed and drawn from a substantially planar surface of the fluid medium during the forming process. Reducing stereolithographic distortion through isolation of stress is described.
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公开(公告)号：AT223299T
公开(公告)日：2002-09-15
申请号：AT96114809
申请日：1989-04-17
Applicant: 3D SYSTEMS INC
Inventor： HULL CHARLES WILLIAM , SPENCE STUART THOMAS , ALBERT DAVID J , SMALLEY DENNIS ROLLETTE , HARLOW RICHARD A , STEINBURGH PHILIP , TARNOFF HARRY L , NGUYEN HOP D , LEWIS CHARLES WILLIAM , VORGITCH TOM J , REMBA DAVID Z
IPC: B29C35/08 , B29C67/00 , B29K105/24 , G01J1/42 , G03C9/08 , G03F7/00 , G03F7/20 , G06F17/50 , G06T17/00 , G06T17/10 , G06T17/20
Abstract: An improved stereolithography system for generating a three-dimensional object by creating a cross-sectional pattern of the object to be formed at a selected surface of a fluid medium capable of altering its physical state in response to appropriate synergistic stimulation by impinging radiation, particle bombardment or chemical reaction, information defining the object being specially processed to reduce curl and distortion, and increase resolution, strength, accuracy, speed and economy of reproduction even for rather difficult object shapes, the successive adjacent laminae, representing corresponding successive adjacent cross-sections of the object, being automatically formed and integrated together to provide a step-wise laminar buildup of the desired object, whereby a three-dimensional object is formed and drawn from a substantially planar surface of the fluid medium during the forming process. The conversion of CAD/CAM data descriptive of the object into stereolithographic data used to trace cross-sections of the object is described.
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公开(公告)号：CA1340890C
公开(公告)日：2000-02-01
申请号：CA617087
申请日：1989-04-17
Applicant: 3D SYSTEMS INC
Inventor： HULL CHARLES WILLIAM , LEWIS CHARLES WILLIAM , VINSON WAYNE ALLAN , FREED RAYMOND SAMUEL , SPENCE STUART THOMAS , SMALLEY DENNIS ROLLETTE
IPC: G03F7/20
Abstract: An improved stereolithography system for generating a three-dimensional object by creating a cross-sectional pattern of the object to be formed at a selected surface of a fluid medium capable of altering its physical state in response to appropriate synergistic stimulation by impinging radiation, particle bombardment or chemical reaction, information defining the object being structurally specified to reduce curl, stress and distortion in the ultimately formed object, the successive adjacent laminae, representing corresponding successive adjacent cross-sections of the object, being automatically formed and integrated together to provide a step-wise laminar buildup of the desired object, whereby a three-dimensional object is formed and drawn from a substantially planar surface of the fluid medium during the forming process. A stereolithographic distortion known as curl is defined, and several techniques to eliminate or reduce curl are described, including dashed line, bent line, secondary structure, rivets, and multi-pass techniques. In addition, a quantitative measurement of curl known as the curl factor, and a test part known as a quarter cylinder are described, which together can be used to measure the effectiveness of the above techniques in reducing curl.
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公开(公告)号：HK1001677A1
公开(公告)日：1998-07-03
申请号：HK98100632
申请日：1998-01-23
Applicant: 3D SYSTEMS INC
Inventor： SMALLEY DENNIS ROLLETTE
IPC: B29C35/08 , B29C67/00 , B29K105/24 , B29C
Abstract: An improved stereolithography system for generating a three-dimensional object by creating a cross-sectional pattern of the object to be formed at a selected surface of a fluid medium capable of altering its physical state in response to appropriate synergistic stimulation by impinging radiation, particle bombardment or chemical reaction, using information defining the object which is specially processed to reduce curl, stress, birdnesting and other distortions, the successive adjacent laminae, representing corresponding successive adjacent cross-sections of the object, being automatically formed and integrated together to provide a step-wise laminar buildup of the desired object, whereby a three-dimensional object is formed and drawn from a substantially planar surface of the fluid medium during the forming process. Reducing stereolithographic distortion through isolation of stress is described.
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