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    THREE-DIMENSIONAL (3D) OBJECT PRINTING BASED ON BUILD MATERIAL PERMEABILITY
    1.
    发明申请
    THREE-DIMENSIONAL (3D) OBJECT PRINTING BASED ON BUILD MATERIAL PERMEABILITY 审中-公开

    公开(公告)号：WO2019194826A1

    公开(公告)日：2019-10-10

    申请号：PCT/US2018/026533

    申请日：2018-04-06

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： SOSNOWSKI, Luke ,  ROMAN, Justin M.

    IPC: B29C64/314 ,  B29C64/364 ,  B29C64/343 ,  B33Y40/00 ,  G05D22/00

    Abstract: A system for manufacturing three dimensional objects can include logic to apply a gas with at least one flow rate to a vessel of a three dimensional printer. The logic can also detect a permeability of a build material residing within the vessel, wherein the permeability is calculated based on a plurality of pressure values detected by a plurality of pressure sensors residing in the vessel, and apply the gas with a predetermined humidity level at a second flow rate to modify the permeability of the build material residing in the vessel. Furthermore, the logic can initialize manufacturing a three dimensional object with the build material in response to detecting the permeability of the build material is below a predetermined threshold.

    DIFFERENT MIXTURES OF BUILD MATERIALS DELIVERABLE DURING A THREE DIMENSIONAL PRINT OPERATION
    3.
    发明申请
    DIFFERENT MIXTURES OF BUILD MATERIALS DELIVERABLE DURING A THREE DIMENSIONAL PRINT OPERATION 审中-公开

    公开(公告)号：WO2019027429A1

    公开(公告)日：2019-02-07

    申请号：PCT/US2017/044725

    申请日：2017-07-31

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： OTIS, JR., David R. ,  SWIER, Kevin E. ,  ROMAN, Justin M.

    IPC: B29C64/329 ,  B33Y40/00

    Abstract: Example implementations relate to different mixtures of build materials deliverable during a three dimensional (3D) print operation. In some examples, a 3D print apparatus may include a delivery hopper to deliver build material to a print zone of the 3D print apparatus and a plurality of build material hoppers to which the delivery hopper is connected for receipt of at least one of a corresponding plurality of build materials. A controller of the 3D print apparatus may direct that variable proportions of a first build material relative to a second build material are receivable by the delivery hopper from the plurality of build material hoppers during the 3D print operation, where different mixtures of the variable proportions of the first build material and the second build material are deliverable to the delivery hopper during the 3D print operation.

    VIBRATION COOLING OF BUILD MATERIAL
    5.
    发明申请
    VIBRATION COOLING OF BUILD MATERIAL 审中-公开

    公开(公告)号：WO2019209282A1

    公开(公告)日：2019-10-31

    申请号：PCT/US2018/029299

    申请日：2018-04-25

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： ROMAN, Justin M. ,  ALONSO BECERRO, Xavier ,  KRASOWSKI, Wojciech Jerzy ,  TELFER, Neil ,  DUDA, Michael

    IPC: B29C64/30 ,  B29C41/46 ,  B33Y40/00

    Abstract: There is disclosed a method of cooling a bed of build material 12, 14 generated by additive manufacture. A container 10 containing a bed of build material may be provided, the bed having a hot region relative to ambient temperature. The container may be vibrated to fluidize unfused build material 12 in the container so as to cause convection of the unfused build material to cool the hot region. There is also disclosed a method of cooling a bed of build material 12, 14 including vibration when the temperature of a hot region in the bed of build material is higher than an unpacking threshold. There is also disclosed a cooling apparatus for cooling a bed of build material by vibration.

    HUMIDIFICATION IN A PNEUMATIC BUILD MATERIAL TRANSPORT SYSTEM
    6.
    发明申请
    HUMIDIFICATION IN A PNEUMATIC BUILD MATERIAL TRANSPORT SYSTEM 审中-公开

    公开(公告)号：WO2019194839A1

    公开(公告)日：2019-10-10

    申请号：PCT/US2018/026629

    申请日：2018-04-07

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： ROMAN, Justin M. ,  SOSNOWSKI, Luke P. ,  OTIS, JR., David R.

    IPC: B29C64/321 ,  B33Y40/00 ,  B65G53/10

    Abstract: In one example, a pneumatic transport system to transport build material in an additive manufacturing machine includes a conduit, a source of air pressure to pull or push a stream of air through the conduit, a source of build material to introduce a build material into the stream of air, a separator to remove build material from the stream of air, a flow meter downstream from the separator to measure the stream of air flowing through the conduit, and a controller operatively connected to the flow meter and to the source of air pressure and/or the sources of build material to, based on a measurement from the flow meter, adjust a rate of flow of the stream of air in the conduit.

    POST-PROCESSING IN 3D PRINTING SYSTEMS
    8.
    发明申请
    POST-PROCESSING IN 3D PRINTING SYSTEMS 审中-公开
    3D打印系统中的后处理

    公开(公告)号：WO2017196355A1

    公开(公告)日：2017-11-16

    申请号：PCT/US2016/032198

    申请日：2016-05-12

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： ROMAN, Justin M. ,  ALONSO BECCERRO, Xavier ,  CHANCLON FERNANDEZ, Ismael

    IPC: B29C67/00 ,  B33Y40/00 ,  B33Y50/02

    Abstract: There are disclosed methods and apparatuses for 3D printing post-processing. The methods and apparatuses provide a container for an additive manufacturing system, the container for receiving a build volume of fused and unfused build material. The container comprises a connector for connecting the container to a pressure source, and at least one air hole to allow passage of air into or out of the container. When the connector is connected to the pressure source, there is generated a flow of air through the container between the connector and the at least one air hole so as to remove unfused build material from the container and to help cool the volume of build material.

    Abstract translation: 公开了用于3D打印后处理的方法和装置。 该方法和装置提供了一种用于增材制造系统的容器，该容器用于接收构建体积的融合和未融合构建材料。 容器包括用于将容器连接至压力源的连接器，以及至少一个气孔以允许空气进入或流出容器。 当连接器连接到压力源时，在连接器和至少一个气孔之间产生通过容器的空气流，以便从容器中去除未融合的建造材料并帮助冷却建造材料的体积。

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