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公开(公告)号：DE60226535D1
公开(公告)日：2008-06-26
申请号：DE60226535
申请日：2002-02-18
Applicant: 3D SYSTEMS INC
Inventor： HANNA STEPHEN D
Abstract: A detoxification process for rendering three-dimensional objects formed by solid freeform fabrication techniques biocompatible for use in long-term dermal contact applications. The process nullifies cytotoxins normally present in objects formed by solid freeform fabrication techniques rendering such techniques as viable for the production of biocompatible devices such as stents, artery valve components, bone implant supports, pacemaker shells, surgical tools, and the like. In one embodiment, a custom hearing aid shell is produced by stereolithography from an acrylate photopolymer resin that was detoxified for long-term dermal contact application. The detoxification process makes three-dimensional objects created by solid freeform fabrication techniques available for products requiring biocompatibility. A preliminary object which contains cytotoxins is formed layerwise. The detoxification process may be performed by entrapping, extracting and/or decomposing cytotoxins; or by subjecting the preliminary object to ultrasonic stimulation in a solvent; or by subjecting the preliminary object to chemical extraction, as in a soxhlet extractor. Alternatively the preliminary object may be detoxified by subjecting it to steam cleaning, thermal heat or by selecting a build style in stereolithography where the beam width of radiation overlaps when solidifying the resin in the layers.
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公开(公告)号：DE60115136T2
公开(公告)日：2006-08-17
申请号：DE60115136
申请日：2001-04-24
Applicant: 3D SYSTEMS INC
Inventor： HANNA STEPHEN D , MOUSSA KHALIL M
Abstract: A process for forming three-dimensional objects layer-by-layer from a photocurable medium uses differential curing of the photocurable medium to form cured solid regions with discrete mechanical properties at selected locations to tailor a part's properties to individual needs. A stereolithographic process and apparatus building objects in a container 21 (vat) of liquid photocurable medium (22) is described in which a UV laser light source (26) is selectively applied to a surface of the medium (22) in accord with object-defining data (19). The laser (26) can be controlled in accord with different build styles to produce parts having different mechanical properties, particularly relating to high temperature resistance and durability.
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公开(公告)号：DE60115136D1
公开(公告)日：2005-12-29
申请号：DE60115136
申请日：2001-04-24
Applicant: 3D SYSTEMS INC
Inventor： HANNA STEPHEN D , MOUSSA KHALIL M
Abstract: A process for forming three-dimensional objects layer-by-layer from a photocurable medium uses differential curing of the photocurable medium to form cured solid regions with discrete mechanical properties at selected locations to tailor a part's properties to individual needs. A stereolithographic process and apparatus building objects in a container 21 (vat) of liquid photocurable medium (22) is described in which a UV laser light source (26) is selectively applied to a surface of the medium (22) in accord with object-defining data (19). The laser (26) can be controlled in accord with different build styles to produce parts having different mechanical properties, particularly relating to high temperature resistance and durability.
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