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公开(公告)号：HK1001675A1
公开(公告)日：1998-07-03
申请号：HK98100600
申请日：1998-01-22
Applicant: 3D SYSTEMS INC
Inventor： HULL CHARLES WILLIAM , LEWIS CHARLES WILLIAM , FREED RAYMOND SAMUEL , SPENCE STUART THOMAS , VINSON WAYNE ALLAN , 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, 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：DE68928133D1
公开(公告)日：1997-07-24
申请号：DE68928133
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：DE354637T1
公开(公告)日：1996-06-27
申请号：DE89303782
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 VAN , NGUYEN HOP D , LEWIS CHARLES WILLIAM VAN , 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 , G03C9/00 , B29C67/04
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：AT313105T
公开(公告)日：2005-12-15
申请号：AT02075796
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：DE68929309T2
公开(公告)日：2002-05-02
申请号：DE68929309
申请日：1989-04-17
Applicant: 3D SYSTEMS INC
Inventor： HULL CHARLES WILLIAM , LEWIS CHARLES WILLIAM , FREED RAYMOND SAMUEL , SPENCE STUART THOMAS , VINSON WAYNE ALLAN , 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, 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：AT202517T
公开(公告)日：2001-07-15
申请号：AT96114443
申请日：1989-04-17
Applicant: 3D SYSTEMS INC
Inventor： HULL CHARLES WILLIAM , LEWIS CHARLES WILLIAM , FREED RAYMOND SAMUEL , SPENCE STUART THOMAS , VINSON WAYNE ALLAN , 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, 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：HK1003081A1
公开(公告)日：1998-10-09
申请号：HK98101916
申请日：1998-03-09
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 , B29C , G03C
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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