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    Open cellular sandwich structures having sealed edges and methods of manufacturing the same
    12.
    发明授权
    Open cellular sandwich structures having sealed edges and methods of manufacturing the same 有权

    公开(公告)号：US11305509B1

    公开(公告)日：2022-04-19

    申请号：US16880237

    申请日：2020-05-21

    Applicant: HRL LABORATORIES, LLC

    Inventor： Jacob M. Hundley ,  Alan J. Jacobsen ,  Sophia S. Yang ,  Zak C. Eckel ,  Christopher S. Roper ,  William Carter

    IPC: B32B3/12 ,  B29C65/70

    Abstract: A method of manufacturing a sandwich structure having an open cellular core and a fluid-tight seal surrounding the core includes coupling a mold to a first facesheet to define a reservoir. The method also includes irradiating a volume of photo-monomer in the reservoir with a series of vertical collimated light beams to form a cured, solid polymer border extending around a periphery of the first facesheet. The method also includes irradiating a remaining volume of photo-monomer in the reservoir with a series of collimated light beams to form an ordered three-dimensional polymer microstructure core defined by a plurality of interconnected polymer optical waveguides coupled to the first facesheet and surrounded by the cured, solid polymer border. The method further includes coupling a second facesheet to the ordered three-dimensional microstructure core and the cured, solid polymer border to form the sandwich structure.

    Aperture system for preceramic polymer stereolithography
    13.
    发明授权
    Aperture system for preceramic polymer stereolithography 有权

    公开(公告)号：US11079683B2

    公开(公告)日：2021-08-03

    申请号：US15606861

    申请日：2017-05-26

    Applicant: HRL LABORATORIES, LLC

    Inventor： Jacob M. Hundley ,  Zak C. Eckel ,  Emily C. Schueller ,  Scott M. Biesboer

    IPC: G03F7/20 ,  B29C37/00 ,  B33Y40/00 ,  B29C64/135 ,  B29C35/08 ,  B33Y30/00 ,  G03F7/00

    Abstract: An aperture system for a bottom-up stereolithography device including a reservoir having a lower opening, an aperture including a flexible membrane positioned within the reservoir and covering the lower opening, and a boundary seal positioned around a periphery of the flexible membrane, the boundary seal including one or more boundary seal components and immobilizing the periphery of the flexible membrane against the reservoir. The flexible membrane is formed of a material having a low affinity for a liquid resin used in the stereolithography device as well as cured photopolymer resin parts produced by the device. In addition, the flexible membrane is able to deform as the cured resin part is pulled away from the aperture, thus enabling lower energy mixed mode adhesive failure to occur at the interface between the cured resin and the aperture and reducing the chance of cohesive damage to the cured photopolymer part.

    Formulations for 3D printing of hydrosilylation-modified polysilazanes
    14.
    发明授权
    Formulations for 3D printing of hydrosilylation-modified polysilazanes 有权

    公开(公告)号：US10961354B1

    公开(公告)日：2021-03-30

    申请号：US16029526

    申请日：2018-07-06

    Applicant: HRL Laboratories, LLC

    Inventor： Zak C. Eckel ,  Ashley M. Dustin ,  April R. Rodriguez ,  Phuong Bui

    IPC: C08G77/62 ,  C04B35/571 ,  C04B35/589 ,  B28B1/00 ,  B33Y80/00 ,  C04B35/597 ,  B33Y10/00

    Abstract: Some variations provide a preceramic resin precursor formulation comprising: first molecules comprising at least one Si—C bond and/or at least one Si—N bond, wherein the first molecules include at least one silyl hydride group (Si—H) available for hydrosilylation; and second molecules with at least one unsaturated carbon-carbon bond attached to a UV-active functional group. The first molecules and second molecules may be reacted, via hydrosilylation with a homogeneous or heterogeneous metal-containing catalyst, to produce third molecules comprising a hydrosilylation-modified polysilazane that contains the UV-active functional group. Many possible starting formulations are described, and methods are disclosed for carrying out the chemical reactions to generate the hydrosilylation-modified polysilazanes. The hydrosilylation-modified polysilazanes may then be 3D-printed and thermally treating to fabricate a ceramic material.

    Method and system for fabricating dual curvature micro-truss structures
    17.
    发明授权
    Method and system for fabricating dual curvature micro-truss structures 有权

    公开(公告)号：US10239237B1

    公开(公告)日：2019-03-26

    申请号：US14824481

    申请日：2015-08-12

    Applicant: HRL LABORATORIES, LLC

    Inventor： Jie Ensberg ,  Christopher J. Ro ,  Sophia S. Yang ,  Zak C. Eckel ,  Eric C. Clough

    IPC: B29C35/08 ,  B29C33/40 ,  B29C33/60 ,  B29C33/38 ,  B32B1/02 ,  B32B3/12 ,  B29K105/00 ,  B29L31/00

    Abstract: A method and/or system for forming a micro-truss structure in an essentially arbitrary shape. A mold that has a transparent portion, and having an interior volume in the desired shape, is filled with photomonomer resin. The material for the transparent portion of the mold is selected to be a material that is index-matched to the photomonomer resin. The filled mold, placed into a bath of transparent fluid index-matched to the transparent portion of the mold, and illuminated, from outside the fluid, through a photomask, with collimated light. The collimated light travels through the photomask forming beams of light that enter the transparent fluid, propagate into the mold, and form a micro-truss structure in the shape of the interior volume of the mold. The micro-truss structure may then be removed from the mold, or part or all of the mold may be left adhered to the micro-truss structure, forming covering face sheets.

    MICROLATTICE STRUCTURES INCLUDING FLAME RETARDANT MATERIALS AND COMPOSITIONS AND METHODS FOR FORMING THE SAME
    20.
    发明申请
    MICROLATTICE STRUCTURES INCLUDING FLAME RETARDANT MATERIALS AND COMPOSITIONS AND METHODS FOR FORMING THE SAME 审中-公开
    包含阻燃材料和组合物的微结构及其形成方法

    公开(公告)号：US20160046769A1

    公开(公告)日：2016-02-18

    申请号：US14826182

    申请日：2015-08-13

    Applicant: HRL Laboratories, LLC

    Inventor： Sophia S. Yang ,  Eric C. Clough ,  Thomas I. Boundy ,  Andrew P. Nowak ,  Zak C. Eckel ,  Alan J. Jacobsen

    IPC: C08G75/00 ,  B05D3/00 ,  C09D181/00

    CPC classification number: C08G75/00 ,  C08K5/10 ,  C09D181/00 ,  C09K21/00

    Abstract: A composition for forming a microlattice structure includes a photopolymerizable compound and a flame retardant material. A microlattice structure includes a plurality of struts interconnected at a plurality of nodes, the struts including: a copolymer including a reaction product of a photopolymerizable compound and a flame retardant material. A microlattice structure includes a plurality of struts interconnected at a plurality of nodes, the struts including: a polymer including a reaction product of a photopolymerizable compound; and a flame retardant material.

    Abstract translation: 用于形成微晶格结构的组合物包括光聚合化合物和阻燃材料。 微晶格结构包括在多个节点处互连的多个支柱，所述支柱包括：包含可光聚合化合物与阻燃材料的反应产物的共聚物。 微晶格结构包括在多个节点处互连的多个支柱，所述支柱包括：包含可光聚合化合物的反应产物的聚合物; 和阻燃材料。

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