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公开(公告)号：US10737439B2
公开(公告)日：2020-08-11
申请号：US15523831
申请日：2015-10-15
发明人： Jörg Ebert , Robert Gmeiner
IPC分类号： B29C64/124 , B29C64/20 , B29C64/295 , B33Y30/00 , B29C64/205
摘要： A stereolithography device having a trough (2) for accommodating free-flowing, photopolymerizable material, a construction platform (4) suspended above the trough bottom on a lifting unit (6), and having a heating unit for heating the photopolymerizable material in the trough. The heating unit has a transparent, electrically conductive layer (33), which covers the entire area of at least the exposure region above the trough bottom, and which is provided outside the exposure region on opposing sides of the layer with electrical contacts (20) extended over the opposing sides, which are connected to a controlled electrical supplier to enable heating of the entire area of photopolymerizable material above the trough bottom in the exposure region by current flow through the layer.
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公开(公告)号：US20200171701A1
公开(公告)日：2020-06-04
申请号：US16679584
申请日：2019-11-11
发明人： Jörg Ebert , Julia-Anna Schönherr , Robert Gmeiner
摘要： The present invention relates to a method for producing shaped bodies (5) from a building material, in which a layered structure of a shaped body (5) takes place by successively solidifying layers of the building material by exposure to electromagnetic radiation in a layer area having a contour specified for the respective layer. The method provides that together with the shaped body (5), a sleeve-like frame (6) surrounding the shaped body at a distance is constructed layer by layer from the building material, and that in addition, a plurality of pin-like connections (10) are constructed integral with the frame (6) and the shaped body (5), which are distributed around the shaped body (5) and which connect the shaped body (5) with the frame (6).
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3.发明授权公开(公告)号：US09738034B2
公开(公告)日：2017-08-22
申请号：US15037170
申请日：2014-11-19
发明人： Simon Gruber , Jürgen Stampfl , Jörg Ebert
CPC分类号： B29C64/386 , B29C64/124 , B29C64/135 , B29C64/20 , B29C64/40 , B29K2027/18 , B29K2059/00 , B33Y30/00 , B33Y50/02
摘要： A device for processing of highly viscous photopolymerizable material for layer-by-layer generation of a shaped body comprises a vat including a bottom which is at least in certain areas thereof transparent, a build platform, an exposure unit for exposing a material layer formed between the lower side of the build platform and the vat bottom in a locally selective manner, a control unit in order to adapt the relative position of the build platform to the vat bottom after each exposure step for a layer, in order to successively build up the shaped body in the desired shape, and a moveably guided doctor blade arrangement including a drive unit for moving the doctor blade arrangement back and forth underneath the build platform. The doctor blade arrangement comprises two doctor blades spaced apart in movement direction, which doctor blades are moveable at a constant distance to the vat bottom along the bottom. The vat includes vat end walls such that the doctor blade leading in movement direction in each case moves towards one of the vat end walls. Between the two doctor blades a chamber is formed which is open at its lower side, wherein walls of the chamber include at least one opening extending through the wall in movement direction for forming an overflow channel, so that material piling up between the leading doctor blade and the facing vat end wall is pressed through they at least overflow channel into the chamber.
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公开(公告)号：US11858169B2
公开(公告)日：2024-01-02
申请号：US16679584
申请日：2019-11-11
发明人： Jörg Ebert , Julia Anna Schönherr , Robert Gmeiner
CPC分类号： B28B1/001 , B28B17/0018 , B29C64/124 , B29C64/40 , C04B35/64 , B33Y10/00
摘要： The present invention relates to a method for producing shaped bodies (5) from a building material, in which a layered structure of a shaped body (5) takes place by successively solidifying layers of the building material by exposure to electromagnetic radiation in a layer area having a contour specified for the respective layer. The method provides that together with the shaped body (5), a sleeve-like frame (6) surrounding the shaped body at a distance is constructed layer by layer from the building material, and that in addition, a plurality of pin-like connections (10) are constructed integral with the frame (6) and the shaped body (5), which are distributed around the shaped body (5) and which connect the shaped body (5) with the frame (6).
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公开(公告)号：US20170334129A1
公开(公告)日：2017-11-23
申请号：US15523831
申请日：2015-10-15
发明人： Jörg Ebert , Robert Gmeiner
IPC分类号： B29C64/124 , B29C64/205 , B33Y30/00
摘要： A stereolithography device having a trough (2) for accommodating free-flowing, photopolymerizable material, a construction platform (4) suspended above the trough bottom on a lifting unit (6), and having a heating unit for heating the photopolymerizable material in the trough. The heating unit has a transparent, electrically conductive layer (33), which covers the entire area of at least the exposure region above the trough bottom, and which is provided outside the exposure region on opposing sides of the layer with electrical contacts (20) extended over the opposing sides, which are connected to a controlled electrical supplier to enable heating of the entire area of photopolymerizable material above the trough bottom in the exposure region by current flow through the layer.
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公开(公告)号：US20210138729A1
公开(公告)日：2021-05-13
申请号：US17068918
申请日：2020-10-13
发明人： Hendrik John , Jörg Ebert , KaI Rist , Sonja Baumgartner , Malte Hartmann
IPC分类号： B29C64/214 , B33Y10/00 , B33Y70/00 , B28B1/00 , B29C64/124 , B33Y30/00 , B29C64/255
摘要： The present invention relates to a method for building a shaped body by layer-wise solidification of photopolymerizable building material by means of stereolithography characterized in that the positioning of a blade with respect to a vat bottom is adjusted in such a manner that the resulting predetermined, uniform layer thickness is higher than the predefined layer thickness to be set by lowering a building platform, but does not exceed the predefined layer thickness by more than 50%.
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公开(公告)号：US11880635B2
公开(公告)日：2024-01-23
申请号：US17935669
申请日：2022-09-27
申请人： Ivoclar Vivadent AG
发明人： Jörg Ebert , Michael Brotzge
IPC分类号： G06F30/00 , B33Y50/02 , B29C64/393 , G05B19/4099 , B22F10/47 , B22F10/30 , B22F10/85 , B22F10/12
CPC分类号： G06F30/00 , B22F10/30 , B22F10/47 , B22F10/85 , B29C64/393 , B33Y50/02 , G05B19/4099 , B22F10/12 , G05B2219/35134 , G05B2219/49007 , G05B2219/49023
摘要： The invention relates to a plausibility checking method for rapid prototyping devices, in particular for stereolithography devices. In this connection, input data (14) is checked which is present particularly in the form of graphics data and of which every file renders a layer. Every layer comprises a plurality of pixels. The component to be printed in the respective layer is produced based on output data by the rapid prototyping device.
The input data of two consecutive layers is checked and the sum of all pixels to be exposed is determined for every layer. A signal (22) is output in particular as a warning signal (26) when the pixel sum of a following layer is larger than in the previous layer by a predetermined factor.-
公开(公告)号：US20230025069A1
公开(公告)日：2023-01-26
申请号：US17935669
申请日：2022-09-27
申请人： Ivoclar Vivadent AG
发明人： Jörg Ebert , Michael Brotzge
IPC分类号： G05B19/4099 , B33Y50/02 , B29C64/393 , G06F30/00
摘要： The invention relates to a plausibility checking method for rapid prototyping devices, in particular for stereolithography devices. In this connection, input data (14) is checked which is present particularly in the form of graphics data and of which every file renders a layer. Every layer comprises a plurality of pixels. The component to be printed in the respective layer is produced based on output data by the rapid prototyping device.
The input data of two consecutive layers is checked and the sum of all pixels to be exposed is determined for every layer. A signal (22) is output in particular as a warning signal (26) when the pixel sum of a following layer is larger than in the previous layer by a predetermined factor.-
公开(公告)号：US20150258732A1
公开(公告)日：2015-09-17
申请号：US14424133
申请日：2013-08-21
申请人： Ivoclar Vivadent AG
发明人： Jürgen Stampfl , Johannes Homa , Johannes Patzer , Gerald Mitteramskogler , Jörg Ebert , Jürgen Laubersheimer , Wolfgang Wachter
IPC分类号： B29C67/00
CPC分类号： B29C64/386 , B29C64/129 , B29C64/135 , B29L2009/00 , B33Y10/00 , B33Y50/02
摘要： The invention relates to a method for the construction of a shaped body from photopolymerizable material by using lithography-based generative production, in which a layer of liquid photopolymerizable material is defined on a production platform, and is polymerized in an exposure region having a predetermined contour, a further layer of photopolymerizable material is defined, the layer defined last is polymerized in an exposure region having a predetermined contour for the layer defined last, and the latter two steps are repeated until a shaped body having a predetermined shape has been formed by the sequence of cured layers with contours predetermined layer by layer, each exposure in an exposure region having a predetermined contour being carried out by controlled activation of individual exposure elements in a two-dimensional array of exposure elements, each exposure element being assigned an image element, wherein the exposure of the exposure region is carried out by a common light source and by a two-dimensional light intensity modulator which is illuminated by the light source and which has a grid of individually controllable intensity modulators, in such a way that each illuminated intensity modulator forms and exposure element that exposes an image element in the exposure region, wherein a two-dimensional matrix is compiled for each exposure step of a layer, each element of the matrix being assigned to an exposure element in the array of exposure elements and control instructions for this exposure element being obtained in the form of a time-dependent function which individually establishes the intensity profile of the radiation of the exposure element over the exposure step, characterized in that, if a component of the intensity variation common to all time-dependent function of the intensity profiles of all exposure elements to be activated exists as a general intensity variation in an exposure step, this general intensity variation is carried out by controlling the intensity of the light source in accordance with the general intensity variation.
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公开(公告)号：US11507055B2
公开(公告)日：2022-11-22
申请号：US16814474
申请日：2020-03-10
申请人： Ivoclar Vivadent AG
发明人： Jörg Ebert , Michael Brotzge
IPC分类号： G05B19/4099 , B33Y50/02 , B29C64/393 , G06F30/00
摘要： The invention relates to a plausibility checking method for rapid prototyping devices, in particular for stereolithography devices. In this connection, input data (14) is checked which is present particularly in the form of graphics data and of which every file renders a layer. Every layer comprises a plurality of pixels. The component to be printed in the respective layer is produced based on output data by the rapid prototyping device.
The input data of two consecutive layers is checked and the sum of all pixels to be exposed is determined for every layer. A signal (22) is output in particular as a warning signal (26) when the pixel sum of a following layer is larger than in the previous layer by a predetermined factor.
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