-
公开(公告)号：AT240829T
公开(公告)日：2003-06-15
申请号：AT00201128
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.
-
公开(公告)号：FR2828423A1
公开(公告)日：2003-02-14
申请号：FR0209501
申请日：2002-07-26
Applicant: 3D SYSTEMS INC
Inventor： DARRAH JAMES F , XU XIAOSHU
Abstract: A computer-controlled apparatus and method for fabricating three-dimensional articles in layerwise fashion is disclosed. Upon dispensing a layer of a fusible powder, a laser irradiates selected locations of that layer to fuse the powder into a cross-section of the article to be formed in that layer, such that the fused cross-sections fuse together into the article. The laser is controlled in a raster scan fashion across the selected locations of the powder layer. The parallel raster scan lines are separated from one another, centerline-to-centerline, according to a selected pitch, or fill scan spacing value. The positions of the parallel scan lines are determined with respect to a coordinate system at the powder layer, rather than with respect to boundaries of the cross-section being formed; in alternating layers, the parallel scan lines are offset from one another by one-half the pitch. This arrangement of the scan lines optimizes the structural strength of the article being formed, while minimizing the number of scans required to form the article.
-
公开(公告)号：DE10231136A1
公开(公告)日：2003-02-13
申请号：DE10231136
申请日：2002-07-10
Applicant: 3D SYSTEMS INC
Inventor： DARRAH JAMES F , XU XIAOSHU
IPC: B29C67/00 , G05B19/4099 , B22F3/105 , B29C67/04 , B23K26/00
Abstract: A computer-controlled apparatus and method for fabricating three-dimensional articles in layerwise fashion is disclosed. Upon dispensing a layer of a fusible powder, a laser irradiates selected locations of that layer to fuse the powder into a cross-section of the article to be formed in that layer, such that the fused cross-sections fuse together into the article. The laser is controlled in a raster scan fashion across the selected locations of the powder layer. The parallel raster scan lines are separated from one another, centerline-to-centerline, according to a selected pitch, or fill scan spacing value. The positions of the parallel scan lines are determined with respect to a coordinate system at the powder layer, rather than with respect to boundaries of the cross-section being formed; in alternating layers, the parallel scan lines are offset from one another by one-half the pitch. This arrangement of the scan lines optimizes the structural strength of the article being formed, while minimizing the number of scans required to form the article.
-
公开(公告)号：ITTO20020685A1
公开(公告)日：2003-02-01
申请号：ITTO20020685
申请日：2002-07-31
Applicant: 3D SYSTEMS INC
Inventor： DARRAH JAMES F , XU XIAOSHU
IPC: B29C67/00 , G05B19/4099
-
公开(公告)号：DE60000946D1
公开(公告)日：2003-01-23
申请号：DE60000946
申请日：2000-02-22
Applicant: 3D SYSTEMS INC
IPC: B29C41/00 , B29C67/00 , B29K77/00 , B29K91/00 , C08K5/103 , C08K5/12 , C08K5/20 , C08L23/16 , C08L77/06 , C08L91/06 , C08L93/04 , C09D11/00
Abstract: Phase change compositions that are solid at ambient temperature and liquid at an elevated temperature above ambient temperature are disclosed for advantageous use in selective deposition modeling methods for building three-dimensional objects. A phase change composition according to the disclosed invention is a semi-crystalline component mixture having a freezing point of at least about 68 DEG C., a melting point of at least about 88 DEG C. and a viscosity of about 13 centipoise at 135 DEG C. The composition includes a plurality of waxes having a broad melting point range and molecular weight range. Three-dimensional objects having minimal curl, delamination and stress cracks can be produced at a faster rate than heretofore known by using selective deposition modeling techniques employing the disclosed composition.
-
Patent Agency Ranking
公开(公告)号：AT223300T
公开(公告)日：2002-09-15
申请号：AT96937643
申请日：1996-09-27
Applicant: 3D SYSTEMS INC
Inventor： LEYDEN RICHARD N , THAYER JEFFREY S , BEDAL BRYAN J L , ALMQUIST THOMAS A , HULL CHARLES W , EARL JOCELYN M , KEREKES THOMAS A , SMALLEY DENNIS R , MEROT CHRISTIAN M , FEDCHENKO RICHARD P , LOCKARD MICHAEL S , PANG THOMAS H , THAT DINH TON
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.
-
公开(公告)号：DE69618619T2
公开(公告)日：2002-08-22
申请号：DE69618619
申请日：1996-03-29
Applicant: 3D SYSTEMS INC
Inventor： MCALEA P , FORDERHASE F , GANNINGER E , MAGISTRO J , KUNIG W
IPC: C08J9/24 , B29C39/00 , B29C41/00 , B29C67/00 , B29C67/20 , B29K105/04 , C08J9/32 , C08K7/20 , C08L77/00 , C08L101/00 , C08J3/20
Abstract: A composite powder specially adapted for use in selective laser sintering is disclosed. The composite powder includes a polymer powder dry mixed with a reinforcement powder, where the polymer powder has a melting temperature substantially lower than that of the reinforcement powder. In the case where nearfully dense parts are to be formed, the first constituent powder is preferably a semi-crystalline powder, for example nylon 11, of a composition suitable for forming near-fully dense parts when used unblended in selective laser sintering; if porous parts are desired, the polymer powder is an amorphous powder, such as polycarbonate, polystyrene, acrylates, and styrene/acrylate copolymers. The reinforcement powder is preferably microspheres of glass, preferably coated to enhance wetting and adhesion with the polymer powder when selective laser sintering is performed. Besides improving the stiffness and heat resistance of the part produced, the composite powder widens the process window over that provided by unblended powder, provides improved dimensional accuracy in the part produced, and facilitates roughbreakout and smooth finishing of the part produced.
-
公开(公告)号：ITTO20020686D0
公开(公告)日：2002-07-31
申请号：ITTO20020686
申请日：2002-07-31
Applicant: 3D SYSTEMS INC
Inventor： XU XIAOSHU , DARRAH JAMES F
IPC: B22F3/105 , B29C67/00 , G05B19/4099
Abstract: A computer-controlled apparatus and method for fabricating three-dimensional articles in layerwise fashion is disclosed. Upon dispensing a layer of a fusible powder, a laser irradiates selected locations of that layer to fuse the powder into a cross-section of the article to be formed in that layer, such that the fused cross-sections fuse together into the article. The laser is controlled in a raster scan fashion across the selected locations of the powder layer. The raster scan lines are defined, for each cross-section, to achieve an optimal fill scan time. The optimal fill scan time is determined, by the computer estimating the fill scan time by rotating the cross-section over a plurality of rotational angles, and estimating the fill scan time for each of the rotated cross-sections for at least a sample of the fill scans necessary to form the article. The actual fill scan vectors to be used in selective laser sintering of the article are rotated, from a coordinate axis at the target plane, according to the rotation of the cross-section providing the lowest estimated fill scan time.
-
公开(公告)号：DE69621001D1
公开(公告)日：2002-06-06
申请号：DE69621001
申请日：1996-01-29
Applicant: 3D SYSTEMS INC
Abstract: Methods and apparatus for use in building three-dimensional objects on substantially a cross-sectional basis including methods and apparatus for forming successive layers using counter-rotating rollers, ink jet recoaters, spinning members which sling material, applicator bars that dispense material via a meniscus and/or independently dispensed streams, and also including methods and apparatus to determine a preferred region over which to form a layer and to check for building errors.
-
公开(公告)号：AT216951T
公开(公告)日：2002-05-15
申请号：AT96906277
申请日：1996-01-29
Applicant: 3D SYSTEMS INC
Inventor： ALMQUIST THOMAS A , HULL CHARLES W , THAYER JEFFREY S , LEYDEN RICHARD N , JACOBS PAUL F , SMALLEY DENNIS R
Abstract: Methods and apparatus for use in building three-dimensional objects on substantially a cross-sectional basis including methods and apparatus for forming successive layers using counter-rotating rollers, ink jet recoaters, spinning members which sling material, applicator bars that dispense material via a meniscus and/or independently dispensed streams, and also including methods and apparatus to determine a preferred region over which to form a layer and to check for building errors.
-
-
-
-
-
-
-
-
-
Search Results
1361
records
(took 0.025 seconds)
