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81. 发明申请

US20040081573A1 Binder removal in selective laser sintering 审中-公开
标题翻译：选择性激光烧结中的粘合剂去除
公开(公告)号：US20040081573A1
公开(公告)日：2004-04-29
申请号：US10279141
申请日：2002-10-23
申请人： 3D SYSTEMS, INC.
发明人： Kenneth J. Newell
IPC分类号： C22C029/00
CPC分类号： B22F3/26 , B22F1/0003 , B22F1/0059 , B22F3/1125 , B22F2998/10 , B33Y70/00 , Y02P10/295 , B22F3/1055
摘要： A method of fabricating an article, such as a prototype part or a tooling for injection molding, by way of selective laser sintering, using a composite powder system of a metal and/or ceramic powder with a polymer binder comprising thermoplastics and thermoset polymers, and a metal hydride powder to form a nullgreennull article. After removal of unfused material from the green article it is placed in an oven or furnace in a non-reactive atmosphere such as, for example, nitrogen or argon, for subsequent heat treatment to decompose and drive off the binder and sinter the metal substrate particles prior to infiltration by a metal with a lower melting point. During the critical step of decomposing the binders, the metal hydride begins to decompose also and releases an in-situ concentration of hydrogen gas that creates the reducing conditions necessary to thoroughly decompose the polymer fragments so that the hydrocarbon fragments can escape the skeleton structure of the article. It has been found that even with higher loadings of binders, leading to higher desired green strengths, the decomposition of the metal hydride eliminates the blistering phenomena associated with high loadings of some binders.
摘要翻译：使用包含热塑性塑料和热固性聚合物的聚合物粘合剂的金属和/或陶瓷粉末的复合粉末系统，通过选择性激光烧结制造制品的原型部件或注模成型工具的方法，以及金属氢化物粉末以形成“绿色”制品。在从绿色制品中除去未熔融的材料之后，将其放置在非反应性气氛例如氮气或氩气的烘箱或炉中，用于随后的热处理以分解和驱除粘合剂并烧结金属基材颗粒在由具有较低熔点的金属渗透之前。在分解粘合剂的关键步骤期间，金属氢化物也开始分解并释放原位浓度的氢气，其产生彻底分解聚合物片段所需的还原条件，使得烃片段可以逸出文章。已经发现，即使具有较高的粘合剂负载量，导致更高的所需绿色强度，金属氢化物的分解消除了与一些粘合剂的高负荷相关的起泡现象。

82. 发明申请

US20040006405A1 Support volume calculation for a CAD model 有权
标题翻译：支持CAD模型的体积计算
公开(公告)号：US20040006405A1
公开(公告)日：2004-01-08
申请号：US10461957
申请日：2003-06-13
申请人： 3D Systems, Inc.
发明人： Yong Chen , Rajeev B. Kulkarni
IPC分类号： G06F019/00
CPC分类号： G05B19/4099 , B29C64/00 , B29C64/106 , B29C2035/0283 , B33Y30/00 , B33Y40/00 , B33Y50/02 , G05B2219/49013 , G05B2219/49016 , G05B2219/49038
摘要： In solid freeform fabrication processes that make use of a removable support material, pre-calculation of the amount of support material needed for a build is difficult (inaccurate or slow) because the digital data for generating the support material is often not generated until the build is in progress. A method is proposed that has been shown to generate rapid and accurate estimates of the amount of both build and support material needed before a build begins, to accurately predict before a build begins when replenishment materials are needed, and to track material consumptions over time.
摘要翻译：在使用可移除支撑材料的固体自由形状制造工艺中，由于用于生成支撑材料的数字数据通常在生成之前不会产生，所以构建所需的支撑材料的量的预计算是困难的（不精确或缓慢的）正在进行中已经提出了一种方法，已经被证明可以在构建开始之前产生所需的构建和支撑材料的量的快速和准确的估计，以便在需要补充材料之前开始构建之前准确地预测并随着时间跟踪材料消耗。

83. 发明申请

US20030028278A1 Selective laser sintering with interleaved fill scan 有权
标题翻译：选择性激光烧结与交错填充扫描
公开(公告)号：US20030028278A1
公开(公告)日：2003-02-06
申请号：US10205698
申请日：2002-07-26
申请人： 3D Systems, Inc.
发明人： James F. Darrah , Xiaoshu Zu
IPC分类号： G06F019/00
CPC分类号： G05B19/4099 , B22F2003/1057 , B22F2998/00 , B29C64/153 , B33Y10/00 , B33Y30/00 , B33Y40/00 , B33Y50/02 , G05B2219/49018 , G05B2219/49035 , Y02P10/295 , B22F3/1055
摘要： A computer-controlled apparatus and method for fabricating three-dimensional articles in layerwise fashion is disclosed. Upon dispensing a layer of a fusible powder, a laser irradiates selected locations of that layer to fuse the powder into a cross-section of the article to be formed in that layer, such that the fused cross-sections fuse together into the article. The laser is controlled in a raster scan fashion across the selected locations of the powder layer. The parallel raster scan lines are separated from one another, centerline-to-centerline, according to a selected pitch, or fill scan spacing value. The positions of the parallel scan lines are determined with respect to a coordinate system at the powder layer, rather than with respect to boundaries of the cross-section being formed; in alternating layers, the parallel scan lines are offset from one another by one-half the pitch. This arrangement of the scan lines optimizes the structural strength of the article being formed, while minimizing the number of scans required to form the article.
摘要翻译：公开了一种以分层方式制造三维制品的计算机控制装置和方法。在分配一层可熔粉末时，激光照射该层的选定位置，将粉末熔合成待形成在该层中的制品的横截面，使得融合的横截面熔合在一起成型。激光器以栅格扫描方式控制在粉末层的选定位置。平行光栅扫描线根据所选间距或填充扫描间距值彼此分离，中心线到中心线。平行扫描线的位置相对于粉末层处的坐标系而不是关于所形成的横截面的边界确定; 在交替层中，平行扫描线彼此偏离了一半的间距。扫描线的这种布置优化了正在形成的制品的结构强度，同时最小化形成制品所需的扫描次数。

84. 发明公开

US20240270987A1 COMPOSITIONS COMPRISING AN ASPHALTITE ADDITIVE FOR ADDITIVE MANUFACTURING 审中-公开
公开(公告)号：US20240270987A1
公开(公告)日：2024-08-15
申请号：US18439042
申请日：2024-02-12
申请人： 3D Systems, Inc.
发明人： Meisam Shir MOHAMMADI
IPC分类号： C09D7/65 , B29C64/118 , B29C64/153 , B29K21/00 , B29K77/00 , B29K105/00 , B29K105/16 , B33Y10/00 , B33Y70/10 , C09D5/03 , C09D177/00
CPC分类号： C09D7/65 , B33Y70/10 , C09D5/033 , C09D177/00 , B29C64/118 , B29C64/153 , B29K2021/003 , B29K2077/00 , B29K2105/16 , B29K2105/251 , B29K2995/004 , B33Y10/00
摘要： Compositions for additive manufacturing applications are described herein which, in some embodiments, provide improved printing properties. In some embodiments, a composition comprises a primary build material in an amount of 10-99.9 wt. % and an asphaltite additive in an amount of up to 6 wt. %, based on the total weight of the composition. In some cases, the asphaltite additive comprises a solid hydrocarbon-based mineral or a solid organic material formed primarily from hydrocarbons and found in an oil-bearing sedimentary basin, such as gilsonite.

85. 发明公开

US20240059910A1 FLAME RESISTANT COMPOSITIONS FOR ADDITIVE MANUFACTURING AND ASSOCIATED PRINTED 3D ARTICLES COMPRISING INTUMESCENT ADDITIVES 审中-公开
公开(公告)号：US20240059910A1
公开(公告)日：2024-02-22
申请号：US18448400
申请日：2023-08-11
申请人： 3D Systems, Inc.
发明人： Meisam Shir MOHAMMADI
IPC分类号： C09D5/18 , B33Y70/00 , C09D7/63 , C09D177/04 , C09K21/12
CPC分类号： C09D5/185 , B33Y70/00 , C09D7/63 , C09D177/04 , C09K21/12 , C08K5/5313
摘要： Compositions for additive manufacturing applications are described herein which, in some embodiments, impart flame resistant and/or flame retardant properties to articles printed or formed from the compositions. The compositions may also impart desirable mechanical properties to the articles. In some embodiments, a composition comprises a sinterable powder or a thermoplastic polymer in an amount of 10-99 wt. %, based on the total weight of the composition, and an intumescent additive in an amount of up to 30 wt. %, based on the total weight of the composition. The intumescent additive comprises a phosphinate component and at least one of (a) a heptazine or melamine-derived component, and (b) a proton donor component.

86. 发明公开

US20240052181A1 FLAME RESISTANT COMPOSITIONS FOR ADDITIVE MANUFACTURING AND ASSOCIATED PRINTED 3D ARTICLES COMPRISING EXPANDABLE GRAPHITE 审中-公开
公开(公告)号：US20240052181A1
公开(公告)日：2024-02-15
申请号：US18448551
申请日：2023-08-11
申请人： 3D Systems, Inc.
发明人： Meisam Shir MOHAMMADI , Khalil MOUSSA , Zezette PFLAUM
IPC分类号： C09D5/18 , C09K21/02 , C09D5/03 , C09D7/61 , C09D7/40 , C09D177/02 , B33Y70/00
CPC分类号： C09D5/185 , C09K21/02 , C09D5/033 , C09D5/031 , C09D7/61 , C09D7/69 , C09D177/02 , B33Y70/00 , C08K7/24
摘要： Compositions for additive manufacturing applications are described herein which, in some embodiments, impart flame resistant and/or flame retardant properties to articles printed or formed from the compositions. The compositions may also impart desirable mechanical properties to the articles. In some embodiments, a composition comprises a sinterable powder or a thermoplastic polymer in an amount of 10-99 wt. %, based on the total weight of the composition, and an expandable graphite component in an amount of up to 20 wt. %, based on the total weight of the composition. In some instances, the expandable graphite component is in its free form or encapsulated in material.

87. 发明公开

US20240026183A1 HYDROGELS FOR 3D PRINTING HAVING HIGH RESOLUTION 审中-公开
公开(公告)号：US20240026183A1
公开(公告)日：2024-01-25
申请号：US18351875
申请日：2023-07-13
申请人： 3D SYSTEMS, INC.
发明人： Monica KEILSOHN , Michael BRADY , Khalil MOUSSA
IPC分类号： C09D151/08 , B33Y70/00 , C09D4/00 , C09D7/41 , C08F290/06 , A61L27/52 , A61L27/16
CPC分类号： C09D151/08 , B33Y70/00 , C09D4/00 , C09D7/41 , C08F290/062 , A61L27/52 , A61L27/16 , B29C64/124
摘要： In one aspect, build materials for use with a three-dimensional (3D) printing system are described herein. In some embodiments, a build material described herein comprises an acrylate component, a photoinitiator component, a non-curable absorber component, and water. The photoinitiator component of the build material is operable to initiate curing of the acrylate component and/or other curable materials that may optionally be present when the photoinitiator is exposed to incident curing radiation having a Gaussian distribution of wavelengths and a peak wavelength λ. The build material has a penetration depth (Dp) and a critical energy (Ec) at the wavelength λ. In some embodiments, the Dp is greater than 200 μm and less than 300 μm, and the Ec is 3-12 mJ/cm2. In other embodiments, the Dp is greater than 10 μm and less than 50 μm, and the Ec is 5-40 mJ/cm2.

88. 发明公开

US20230364681A1 EFFICIENT BULK UNFUSED POWDER REMOVAL SYSTEM AND METHOD 审中-公开
公开(公告)号：US20230364681A1
公开(公告)日：2023-11-16
申请号：US18163956
申请日：2023-02-03
申请人： 3D Systems, Inc.
发明人： Ahren Michael Hoy , Turner Ashby Cathey , Alexander J Geyling
IPC分类号： B22F10/68 , B33Y40/20 , B22F10/28 , B33Y30/00 , B33Y10/00
CPC分类号： B22F10/68 , B33Y40/20 , B22F10/28 , B33Y30/00 , B33Y10/00
摘要： An additive manufacturing system for producing a three-dimensional article includes a print engine, a post-fabrication powder removal apparatus, a transport mechanism, and a controller. The post fabrication removal apparatus includes a rotary frame defining an internal receptacle cavity, a plurality of clamps coupled to a corresponding plurality of actuators, a clamping plate coupled to a lift apparatus, and an agitation device mounted to the clamping plate. The controller is configured to perform the following steps: (1) Operate the transport mechanism to transport the build box to the internal receptacle cavity. (2) Operate the plurality of actuators to engage the build box with the plurality of clamps to secure the build box to the rotary frame. (3) Operate the rotary frame to rotate the build box until unfused powder begins to exit the build box. (4) Operate the agitation device to facilitate pouring of the unfused powder from the build box.

89. 发明授权

US11813796B2 3D printing system with agitation device 有权
公开(公告)号：US11813796B2
公开(公告)日：2023-11-14
申请号：US17848452
申请日：2022-06-24
申请人： 3D Systems, Inc.
发明人： Andrew Enslow , Frederick T. Mattern
IPC分类号： B29C64/314 , B29C64/124 , B29C64/255 , B29C64/227 , B33Y10/00 , B33Y30/00 , B33Y40/10
CPC分类号： B29C64/314 , B29C64/124 , B29C64/227 , B29C64/255 , B33Y10/00 , B33Y30/00 , B33Y40/10
摘要： A three-dimensional (3D) printing system is configured to manufacture a three-dimensional 3D article in a layer-by-layer manner. The 3D printing system includes a resin vessel, a tank agitation subsystem, a fabrication subsystem, and a controller. The resin vessel is configured to contain photocurable resin and has a lower region within a distance H of a bottom surface of the resin vessel. The agitation subsystem includes (a) a grating disposed within the lower region of the resin vessel and (b) an agitation movement mechanism coupled to the grating. The fabrication subsystem is configured to form the 3D article by a layer-by-layer selective curing of the photocurable resin. The controller is configured to operate the agitation movement mechanism to oscillate the grating along a lateral Y-axis to remix filler particulates within the photocurable resin.

90. 发明公开

US20230357577A1 BUILD MATERIALS FOR PRINTING 3D ARTICLES 审中-公开
公开(公告)号：US20230357577A1
公开(公告)日：2023-11-09
申请号：US18348033
申请日：2023-07-06
申请人： 3D SYSTEMS, INC.
发明人： John FONG
IPC分类号： C09D4/06 , B33Y10/00 , B33Y70/00 , B29C64/124 , C09D133/26 , C09D135/02
CPC分类号： C09D4/06 , B33Y10/00 , B33Y70/00 , B29C64/124 , C09D133/26 , C09D135/02
摘要： Polymerizable liquids are described herein which, in some embodiments, can produce 3D printed articles of high resolution and desirable mechanical properties. In one aspect, a polymerizable liquid comprises an acrylate component, and a composite resin comprising a curable carrier and polymeric particles dispersed in the curable carrier. The polymerizable liquid also comprises a photoinitiator component.

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