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    PROCESS CONTROL METHOD FOR A 3D PRINTING PROCESS
    1.
    发明申请
    PROCESS CONTROL METHOD FOR A 3D PRINTING PROCESS 有权

    公开(公告)号：US20250067600A1

    公开(公告)日：2025-02-27

    申请号：US18898026

    申请日：2024-09-26

    Applicant: Ivoclar Vivadent AG

    Inventor： Joachim Reissner ,  Jörg Ebert ,  Lorenz Josef Bonderer

    IPC: G01J5/08 ,  B29C64/124 ,  B29C64/245 ,  B29C64/264 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  G01J5/00

    Abstract: A process control method for a 3D-printing process using a 3D printer. The 3D printer has a build platform, a light source, a receiving device for printing material and a control device by which an object can be produced layer-wise or continuously from the printing material. The method includes using a thermal imaging camera, the output signal of which is transmitted to the control device, connected to the 3D printer, The method includes the following steps of illuminating a layer or parts of said layer positionally selectively, detecting the temperature of the layer during the polymerisation using the thermal imaging camera, ending the building process of a layer by ending the illumination, the time of the end of the illumination being established by a predefined temperature Tmax or a predefined change in temperature dT/dt being reached.

    Plausibility Checking Method For Additive Manufacturing Methods
    3.
    发明申请
    Plausibility Checking Method For Additive Manufacturing Methods 有权

    公开(公告)号：US20230025069A1

    公开(公告)日：2023-01-26

    申请号：US17935669

    申请日：2022-09-27

    Applicant: Ivoclar Vivadent AG

    Inventor： Jörg Ebert ,  Michael Brotzge

    IPC: G05B19/4099 ,  B33Y50/02 ,  B29C64/393 ,  G06F30/00

    Abstract: 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.

    Stereolithography device having a heating unit
    4.
    发明授权
    Stereolithography device having a heating unit 有权

    公开(公告)号：US10737439B2

    公开(公告)日：2020-08-11

    申请号：US15523831

    申请日：2015-10-15

    Applicant: Ivoclar Vivadent AG ,  Technische Universität Wien

    Inventor： Jörg Ebert ,  Robert Gmeiner

    IPC: B29C64/124 ,  B29C64/20 ,  B29C64/295 ,  B33Y30/00 ,  B29C64/205

    Abstract: 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.

    Method For The Additive Manufacture Of Shaped Bodies
    5.
    发明申请
    Method For The Additive Manufacture Of Shaped Bodies 审中-公开

    公开(公告)号：US20200171701A1

    公开(公告)日：2020-06-04

    申请号：US16679584

    申请日：2019-11-11

    Applicant: Ivoclar Vivadent AG ,  Technische Universität Wien

    Inventor： Jörg Ebert ,  Julia-Anna Schönherr ,  Robert Gmeiner

    IPC: B28B1/00 ,  B28B17/00 ,  C04B35/64

    Abstract: 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).

    METHOD FOR THE CONSTRUCTION OF A SHAPED BODY
    6.
    发明申请
    METHOD FOR THE CONSTRUCTION OF A SHAPED BODY 有权

    公开(公告)号：US20150258732A1

    公开(公告)日：2015-09-17

    申请号：US14424133

    申请日：2013-08-21

    Applicant: Ivoclar Vivadent AG

    Inventor： Jürgen Stampfl ,  Johannes Homa ,  Johannes Patzer ,  Gerald Mitteramskogler ,  Jörg Ebert ,  Jürgen Laubersheimer ,  Wolfgang Wachter

    IPC: B29C67/00

    CPC classification number: B29C64/386 ,  B29C64/129 ,  B29C64/135 ,  B29L2009/00 ,  B33Y10/00 ,  B33Y50/02

    Abstract: 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.

    Stereolithography apparatus material provision device
    10.
    发明授权
    Stereolithography apparatus material provision device 有权

    公开(公告)号：US11225021B2

    公开(公告)日：2022-01-18

    申请号：US16354636

    申请日：2019-03-15

    Applicant: Ivoclar Vivadent AG

    Inventor： Walter Pokorny ,  Jörg Ebert ,  Johannes Lorünser

    IPC: B29C64/255 ,  B29C64/321 ,  B33Y30/00 ,  B29C64/124 ,  B33Y10/00

    Abstract: In a stereolithography apparatus a material provision device for print material (16) to be cured, in particular a photopolymer, is provided. The material provision device (10) receives a material cartridge (12) which in turn receives the print material (16) and surrounds it on all sides. The material cartridge (12) may be connected to an outlet valve unit (20) in a liquid-proof manner via which the print material (16) may be output and which is received at least partially in the material provision device (10) and which is supported at least partially thereon or therein or sealed against it. The outlet valve unit (20) comprises a valve (100) which is opened and closed depending on the relative position, in particular the swiveling position, of material provision device (10) and stereolithography apparatus.

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