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    EXTRACTION SYSTEM FOR APPARATUS FOR THE LAYER-BY-LAYER FORMATION OF THREE-DIMENTIONSL OBJECTS, AND ASSOCIATED METHODS AND CONTROLLER
    3.
    发明公开
    EXTRACTION SYSTEM FOR APPARATUS FOR THE LAYER-BY-LAYER FORMATION OF THREE-DIMENTIONSL OBJECTS, AND ASSOCIATED METHODS AND CONTROLLER 审中-公开

    公开(公告)号：US20230142837A1

    公开(公告)日：2023-05-11

    申请号：US17916026

    申请日：2021-03-29

    Applicant: Stratasys Powder Production Ltd.

    Inventor： Marcel GARRIDO BARRABES ,  Anders HARTMANN

    IPC: B29C64/364 ,  B29C64/393

    CPC classification number: B29C64/364 ,  B29C64/393 ,  B33Y30/00

    Abstract: An apparatus for the layer-by-layer formation of three-dimensional objects, the apparatus comprising a gas extraction system and an enclosed working space from which gas is to be extracted, wherein the working space is enclosed by side walls, a ceiling and a working surface, and comprises a working space inlet for allowing gas to enter into the working space, a working space outlet for allowing gas to exit the working space, and a build bed surface in which a layer of the object is formed; wherein the gas extraction system comprises: a primary conduit comprising at least a first primary inlet, at least a first interfacing inlet, and a primary outlet; and at least a first secondary conduit comprising a respective first secondary inlet and a respective first secondary outlet, the first secondary inlet being in fluidic communication with the working space for extracting gas from the working space, and the first secondary outlet being in fluidic communication with the first interfacing inlet; wherein the or each primary inlet is open to an environment external to the working space, and wherein the primary outlet is connectable to an external extraction source so as to suction gas from the primary conduit; and wherein the gas extraction system further comprises one or more flow control devices for controlling the flow of gas from the working space into the first secondary conduit, and thence into the primary outlet of the primary conduit. Methods for operating the apparatus, and a controller for controlling the apparatus and carrying out the methods, are also provided.

    METHOD FOR CALIBRATING HEAT SOURCES IN AN APPARATUS FOR THE MANUFACTURE OF 3D OBJECTS
    4.
    发明申请
    METHOD FOR CALIBRATING HEAT SOURCES IN AN APPARATUS FOR THE MANUFACTURE OF 3D OBJECTS 有权

    公开(公告)号：US20230091823A1

    公开(公告)日：2023-03-23

    申请号：US17943621

    申请日：2022-09-13

    Applicant: Stratasys Powder Production Ltd.

    Inventor： Gianluca Dorini

    IPC: B29C64/393 ,  B29C64/153 ,  B33Y10/00 ,  B33Y50/02 ,  B33Y40/10

    Abstract: A method for calibrating heat source(s) in an apparatus for manufacturing 3D objects including layer cycle steps of: distributing a layer of particulate material over a build bed; heating the layer with a heat source at a first power profile; measuring a set of temperatures at multiple regions; depositing absorption modifier (absorber) over each region and/or depositing absorption modifier (inhibitor) over a surrounding area; heating each region with the heat source or a second heat source at a second input power profile; and measuring a second set of temperatures at each region; repeating the layer cycle using different input power profiles; and determining an adjusted first and/or second input power profile, wherein when applied during a subsequent layer cycle, causes a subsequent measured set of temperatures to be within a range of target temperatures, such that the ranges are reduced over those measured for each of the calibration layers.

    METHOD FOR PREPARING VIRTUAL BUILD VOLUMES
    6.
    发明申请
    METHOD FOR PREPARING VIRTUAL BUILD VOLUMES 有权

    公开(公告)号：US20240424732A1

    公开(公告)日：2024-12-26

    申请号：US18547061

    申请日：2023-04-21

    Applicant: Stratasys Powder Production Ltd.

    Inventor： Robert May

    IPC: B29C64/171 ,  B29C64/386 ,  B33Y10/00 ,  B33Y50/00

    Abstract: A method for preparing virtual build volumes for the manufacture of three-dimensional objects. The virtual build volume represents an actual build volume over which one or more objects are to be built. The method includes the steps of: (a) receiving one or more object models, the object model(s) defining the intended dimensions of each of the objects; (b) applying a transformation to an initial virtual build volume to create a reduced virtual build volume smaller than the virtual build volume; (c) positioning the object model(s) within the reduced virtual build volume; and (d) applying an inverse transformation to expand the reduced virtual build volume to create an expanded virtual build volume including expanded object model(s); wherein each of the expanded object model(s) is larger than the respective object model(s).

    METHOD FOR DETERMINING A SET POINT FOR A THERMAL SENSOR IN AN APPARATUS FOR THE MANUFACTURE OF 3D OBJECTS
    9.
    发明申请
    METHOD FOR DETERMINING A SET POINT FOR A THERMAL SENSOR IN AN APPARATUS FOR THE MANUFACTURE OF 3D OBJECTS 有权

    公开(公告)号：US20230079989A1

    公开(公告)日：2023-03-16

    申请号：US17943438

    申请日：2022-09-13

    Applicant: Stratasys Powder Production Ltd.

    Inventor： Gianluca Dorini

    IPC: B29C64/165 ,  B29C64/209 ,  B29C64/282 ,  B29C64/314 ,  B29C64/393 ,  B33Y10/00 ,  B33Y40/10 ,  B33Y50/02

    Abstract: A method for determining a set point for a thermal sensor. The method includes (a) distributing a layer of particulate material to provide a build bed surface; (b) depositing an amount of absorption modifier over a test region or a surrounding area; (c) heating the test region; (d) measuring a temperature value within the test region with the sensor; (e) distributing a new layer of material over the preceding layer; repeating (b) to (e) until the material of the test region starts to melt, wherein repeated step (b) deposits additional absorption modifier over the test region to absorb more energy from the heat source than the preceding layer; determining a set point for the thermal sensor from a characteristic in the evolution of the measured temperature value within the test region; and applying the set point to subsequent measurements of the thermal sensor.

    SLED CONFIGURATIONS AND METHODS OF OPERATION FOR THE MANUFACTURE OF THREE-DIMENSIONAL OBJECTS
    10.
    发明申请
    SLED CONFIGURATIONS AND METHODS OF OPERATION FOR THE MANUFACTURE OF THREE-DIMENSIONAL OBJECTS 有权

    公开(公告)号：US20220388240A9

    公开(公告)日：2022-12-08

    申请号：US17311242

    申请日：2019-12-05

    Applicant: Stratasys Powder Production Ltd.

    Inventor： Frederik Tjellesen ,  Anders Hartmann ,  Neil Hopkinson

    IPC: B29C64/165 ,  B29C64/209 ,  B29C64/236 ,  B29C64/314 ,  B29C64/277 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/10 ,  B29C64/218

    Abstract: Apparatus (1) for manufacturing a three-dimensional object from a powder, the apparatus (1) comprising: a build bed (201) having a build area (190), wherein successive layers of said three-dimensional object are formed in the build bed (201); a powder distribution sled (300) operable to distribute a layer of powder within the build area (190), the powder distribution sled (300) being driveable in a first direction along a first axis, across the build area (190), and driveable in a second direction, opposite to the first direction, along the first axis; and a print sled (350) operable to deposit a pattern of fluid onto the layer of powder within the build area (190) to define the cross section of said object in said layer, the print sled (350) being driveable in the first direction along a second axis across the build area, and driveable in the second direction along the second axis; wherein the first axis is parallel to, or coaxial with, the second axis; wherein the print sled (350) comprises one or more droplet deposition heads (370) for depositing the fluid, a first radiation source assembly (L1), and a second radiation source assembly (L2); wherein the powder distribution sled (300) comprises a powder distribution device (320) for distributing the powder, a third radiation source assembly (L3) and a fourth radiation source assembly (L4); and wherein each of the first, second, third and fourth radiation source assemblies is operable to both preheat and sinter powder within the build area (190). A method of manufacturing a three-dimensional object from a powder using such apparatus is also provided.

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