-
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
-
公开(公告)号：AT209101T
公开(公告)日：2001-12-15
申请号：AT95917693
申请日：1995-04-25
Applicant: 3D SYSTEMS INC
-
公开(公告)号：CA2186613A1
公开(公告)日：1995-11-02
申请号：CA2186613
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 RICHARD N , VANDORIN STACIE L
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 Zerror 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.
-
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.
-
-
-
Search Results
4
records
(took 0.021 seconds)
