Verringerung des stereolithographischen Verbiegens
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, pa...
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Main Authors | , , , , , |
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Format | Patent |
Language | German |
Published |
02.05.2002
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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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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AbstractList | 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. |
Author | FREED, RAYMOND SAMUEL VINSON, WAYNE ALLAN HULL, CHARLES WILLIAM LEWIS, CHARLES WILLIAM SMALLEY, DENNIS ROLLETTE SPENCE, STUART THOMAS |
Author_xml | – fullname: LEWIS, CHARLES WILLIAM – fullname: FREED, RAYMOND SAMUEL – fullname: VINSON, WAYNE ALLAN – fullname: SMALLEY, DENNIS ROLLETTE – fullname: SPENCE, STUART THOMAS – fullname: HULL, CHARLES WILLIAM |
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Snippet | 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... |
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SubjectTerms | AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING APPARATUS SPECIALLY ADAPTED THEREFOR CALCULATING CINEMATOGRAPHY COMPUTING COUNTING DECORATIVE ARTS ELECTRIC DIGITAL DATA PROCESSING ELECTROGRAPHY HOLOGRAPHY INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FORSCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING MATERIALS THEREFOR ORIGINALS THEREFOR PERFORMING OPERATIONS PHOTOGRAPHY PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES PHYSICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL |
Title | Verringerung des stereolithographischen Verbiegens |
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