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    BUILDING PLATE ASSEMBLY FOR USE IN AN ADDITIVE MANUFACTURING APPARATUS
    4.
    发明公开
    BUILDING PLATE ASSEMBLY FOR USE IN AN ADDITIVE MANUFACTURING APPARATUS 审中-公开

    公开(公告)号：US20230148336A1

    公开(公告)日：2023-05-11

    申请号：US17916084

    申请日：2021-03-26

    Applicant: DENTSPLY SIRONA Inc. ,  SIRONA Dental Systems GmbH

    Inventor： Christian STAHL ,  Christoph BRANDES

    IPC: B29C64/245 ,  B33Y30/00

    CPC classification number: B29C64/245 ,  B33Y30/00 ,  B29C64/124

    Abstract: A building plate assembly for use in an additive manufacturing apparatus including means for additively manufacturing a component through curing photocurable resin, the building plate assembly including: a building plate having a front surface on which the component can be attached during the additive manufacturing; a plurality of through holes formed between the rear surface and the front surface of the building plate; further including: a detachment means having one or more projections which can be relatively moved towards the rear surface and into the through-holes to detach the component from the front surface and, retracted to at least partly clear the through-holes. The through-holes and the corresponding projections are arranged in a two-dimensional array.

    DETERMINATION OF SURFACES AND VOLUMES WORTH PROTECTING IN ADDITIVE/SUBTRACTIVE MANUFACTURING JOBS WITH NEURAL NETWORKS
    5.
    发明公开
    DETERMINATION OF SURFACES AND VOLUMES WORTH PROTECTING IN ADDITIVE/SUBTRACTIVE MANUFACTURING JOBS WITH NEURAL NETWORKS 审中-公开

    公开(公告)号：US20240296264A1

    公开(公告)日：2024-09-05

    申请号：US18578357

    申请日：2022-07-12

    Applicant: DENTSPLY SIRONA Inc. ,  SIRONA Dental Systems GmbH

    Inventor： Christian STAHL

    IPC: G06F30/27 ,  A61C13/00 ,  A61C13/34 ,  B33Y50/00 ,  B33Y80/00

    CPC classification number: G06F30/27 ,  A61C13/0004 ,  A61C13/34 ,  B33Y50/00 ,  B33Y80/00

    Abstract: A computer-implemented method for the automatic generation of component-describing data for use in a preparation of additive/subtractive manufacturing jobs for dental components such as splints, denture bases, models, restorations such as bridges and crowns, in which for each at least one component type a specialized pre-trained neural network is used for setting surface and/or volume attributes of the dental component, in which the surface and volume attributes describe the accuracy and quality requirements of construction elements of the dental components with regard to the intended use, in which the accuracy and quality requirements comprise at least one of the following: geometric dimensional accuracy, mechanical strength, surface texture color, and the avoidance of the attachment of support elements, in which the neural network has been pre-trained by means of dental components for which the surface and/or volume attribution has already been carried out.

    METHOD OF DETERMINING LAYER THICKNESSES OF 3D MODELS FOR ADDITIVE MANUFACTURING
    6.
    发明申请
    METHOD OF DETERMINING LAYER THICKNESSES OF 3D MODELS FOR ADDITIVE MANUFACTURING 有权

    公开(公告)号：US20220207829A1

    公开(公告)日：2022-06-30

    申请号：US17604471

    申请日：2020-04-24

    Applicant: DENTSPLY SIRONA Inc.

    Inventor： Christian STAHL ,  Daniel WEISS

    IPC: G06T17/20 ,  B29C64/393 ,  B33Y50/02 ,  A61C1/08

    Abstract: The present invention relates to a method of determining layer thicknesses (t) of a three-dimensional model (1) for generation with an additive manufacturing apparatus, the method comprising: a step of determining the layer thicknesses (t) according to an adaptive slicing algorithm in which the thickness of a layer (2) is calculated through a relation based on the inclination of the normal vectors (n) of the surface elements (s) of the 3D model (1) which at least partly enclose the layer (2) from a horizontal direction (x; y) the method being characterized by further comprising: a step of selectively imposing on at least one surface element (s) of the 3D model (1) a precision requirement out of one or more selectable different precision requirements which respectively differently alter in the determination step the relation with respect to the inclination of the normal vector (n) of the said at least one surface element (s) which allows, through the altered relation, the layer thickness (t) to obtain a value smaller or larger than the layer thickness (t) determined through the unaltered relation.

    METHOD OF PREVENTING FLUID COLLECTION / SUCTION IN ADDITIVE MANUFACTURING OF 3D OBJECTS
    7.
    发明申请
    METHOD OF PREVENTING FLUID COLLECTION / SUCTION IN ADDITIVE MANUFACTURING OF 3D OBJECTS 有权

    公开(公告)号：US20220161500A1

    公开(公告)日：2022-05-26

    申请号：US17442681

    申请日：2020-04-08

    Applicant: DENTSPLY SIRONA Inc. ,  SIRONA DENTAL SYSTEMS GMBH

    Inventor： Christian STAHL ,  Daniel WEISS

    IPC: B29C64/393 ,  B29C64/124 ,  B29C64/245 ,  B29C64/232 ,  B29C64/35 ,  B33Y40/20 ,  B33Y80/00 ,  B33Y50/02 ,  B33Y10/00

    Abstract: The present invention relates to a method of preparing a digital 3D model suitable to be generated and post-processed with an additive manufacturing system (1) comprising: an additive manufacturing apparatus (2) for generating the 3D object (3) corresponding to the prepared digital 3D model, attached to a platform (4) which can be gradually moved upwards, out of a fluid resin (5a) in a vat (6); and at least one post-processing apparatus (7) for performing at least one of washing, drying and curing the 3D object (3) received and maintained in the state attached to the platform (4) during the post-processing, the method comprising: a step of providing the digital 3D model; the method being characterized by further comprising: a step of determining fluid-collecting, basin-like, open regions (8) or fluid-sucking, dome-like, open regions (9) of the digital 3D model orientated in said state relative to the platform (4), and a step of including at least one drain channel (10) and/or at least one vent channel (11) into the fluid-collecting, basin-like, open region (8) and/or the fluid-sucking, dome-like, open region (9) in the digital 3D model respectively for preventing collection of fluid (5a, 5b) or suction of fluid (5a, 5b) during the generation process and the post-processing process.

    PIVOTING BUILDING PLATFORM FOR CREATING A PARALLEL BUILDING PLANE
    8.
    发明申请
    PIVOTING BUILDING PLATFORM FOR CREATING A PARALLEL BUILDING PLANE 有权

    公开(公告)号：US20240375352A1

    公开(公告)日：2024-11-14

    申请号：US18577808

    申请日：2022-07-12

    Applicant: DENTSPLY SIRONA Inc.

    Inventor： Thomas SCHAEFER ,  Christian STAHL ,  Christian SCHMIDT ,  Peter FORNOFF

    IPC: B29C64/245 ,  B29C64/124 ,  B29C64/236 ,  B29C64/255 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

    Abstract: The disclosure relates to a 3D printer including: a vat having an at least partially transparent bottom for receiving liquid photoreactive resin for producing a solid component; a building platform for pulling the component layer by layer out of the vat; a projector for projecting the layer geometry onto the transparent bottom; a transport apparatus for moving the building platform at least downward or upward in the vat; and a receiving apparatus for detachably connecting the building platform to the transport apparatus. The receiving apparatus includes a pivoting device for pivotally holding the building platform and is adapted to abut the underside of the building platform parallelly onto the transparent bottom of the vat when lowered by the transport apparatus. The 3D printer is provided without for the ability to completely block the pivotal movement of the pivotably held building platform.

    IMPOSING QUALITY REQUIREMENTS ON 3D MODELS WITH SUPPORT STRUCTURES
    10.
    发明申请
    IMPOSING QUALITY REQUIREMENTS ON 3D MODELS WITH SUPPORT STRUCTURES 有权

    公开(公告)号：US20220297385A1

    公开(公告)日：2022-09-22

    申请号：US17634827

    申请日：2020-07-29

    Applicant: DENTSPLY SIRONA Inc.

    Inventor： Simon TANAKA ,  Christian STAHL ,  Daniel WEISS

    IPC: B29C64/40 ,  B29C64/386 ,  B33Y50/00 ,  G05B19/4099

    Abstract: A method of imposing quality requirements on a 3D model including support structures to be built by an additive manufacturing apparatus including: defining the surface geometry and the orientation of the 3D model with respect to the platform, the surface geometry includes surface segments. The method further includes attributing a degree of quality (L;H) to the surface segments respectively against post-processing for the subsequent removal of the support structures calculating, based on the defined orientation, the surface geometry and the degree of quality L;H) attributed; and adding the support structure to the 3D model based on the calculated positions and the degree of quality (L;H) attributed.

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