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公开(公告)号：US20200262150A1
公开(公告)日：2020-08-20
申请号：US16280336
申请日：2019-02-20
IPC分类号： B29C64/393 , B29C64/135 , B29C64/245 , B29C64/268
摘要： An additive manufacturing apparatus is disclosed. The apparatus includes a build surface, at least a portion of which is transparent. The apparatus includes a first material depositor operable to deposit a curable resin to form a deposited resin layer on the build surface. A first sensing device is configured to measure the thickness of the deposited resin layer; and wherein the at least one sensing device is configured to generate a signal indicative of the thickness of the deposited resin layer. The first sensing device can be connected to a computer such that the additive manufacturing apparatus is configured to control the thickness of the deposited resin layer. The thickness of the deposited resin layer can be controlled such that it varies from side to side, i.e. across the width of the deposited resin layer in the transverse direction along the x-axis. The thickness can also be controlled such that it varies with time, i.e., in the machine direction along the y-axis.
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公开(公告)号：US20190284096A1
公开(公告)日：2019-09-19
申请号：US15922587
申请日：2018-03-15
摘要： A ceramic slurry for forming a ceramic article includes a binder, a first plurality of ceramic particles having a first morphology, a second plurality of ceramic particles having a second morphology that is different from the first morphology; and a photoinitiator. A method for using this slurry for fabricating ceramic articles is presented as well.
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公开(公告)号：US10391549B2
公开(公告)日：2019-08-27
申请号：US15636404
申请日：2017-06-28
发明人： Xi Yang , Michael Cole , Michael Brown , Gregory Terrence Garay , Tingfan Pang , Brian David Przeslawski , Douglas Gerard Konitzer
摘要： A method of forming a cast component and a method of forming a casting mold is generally provided. The method is performed by plugging or covering an opening in a ceramic core-shell mold. The ceramic core-shell mold includes at least a first core portion, a first shell portion, and at least one first cavity between the core portion and the first shell portion. The core-shell mold may be manufactured using an additive manufacturing process. At least a portion of the ceramic core-shell mold and the plug or cover is coated with a second ceramic material.
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公开(公告)号：US09975175B2
公开(公告)日：2018-05-22
申请号：US14761569
申请日：2013-10-11
CPC分类号： B22D25/02 , B22C7/02 , B22C9/04 , B22C9/22 , B22D27/045 , B29C64/00 , B29L2031/08 , Y02P10/292
摘要： A method of casting a truss structure having spaced face sheets connected by columnar structures, including forming a three-dimensional pattern (3D pattern) in the shape of the truss structure with the spaced face sheets and columnar structures, forming a mold core of the 3D pattern by surrounding the pattern with a liquid and letting the liquid harden about the 3D pattern, removing the 3D pattern from the mold core, filling the mold core with a liquid alloy to cast and directionally solidify the truss structure.
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公开(公告)号：US09950358B2
公开(公告)日：2018-04-24
申请号：US14945602
申请日：2015-11-19
发明人： Xi Yang , John Thomas Leman , Anthony Yu-Chung Ku , Tao Li , John Pollinger
摘要： The present disclosure generally relates to a ceramic core comprising predominantly mullite, which is derived from a precursor comprising alumina particles and siloxane binders. Free silica is present in the ceramic body, but is largely unavailable for reaction with metal alloys used in investment casting. Methods of making cast metal articles are also disclosed.
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公开(公告)号：US20140238632A1
公开(公告)日：2014-08-28
申请号：US13780763
申请日：2013-02-28
IPC分类号： B22C9/10
摘要： A method is provided for repairing defects in a ceramic core adapted for use in a casting process. The ceramic core is formed from a slurry comprising at least one refractory powder material suspended in a liquid vehicle. The method includes forming a repair mixture comprising a liquid diluent and the at least one refractory powder material suspended in the liquid vehicle of the slurry. The repair mixture is applied to a region of the ceramic core that includes at least one defect and then the ceramic core is fired to burn off the liquid vehicle in the repair mixture and form a ceramic composition that closes the defect.
摘要翻译： 提供了一种用于修复适于在铸造工艺中使用的陶瓷芯中的缺陷的方法。 陶瓷芯由包含悬浮在液体载体中的至少一种耐火粉末材料的浆料形成。 该方法包括形成包含液体稀释剂和悬浮在浆液的液体载体中的至少一种耐火材料粉末的修复混合物。 将修复混合物施加到包括至少一个缺陷的陶瓷芯的区域，然后烧制陶瓷芯以在修复混合物中燃烧液体载体并形成封闭缺陷的陶瓷组合物。
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公开(公告)号：US20240269931A1
公开(公告)日：2024-08-15
申请号：US18635285
申请日：2024-04-15
发明人： Meredith Elissa Dubelman , Christopher David Barnhill , Xi Yang , William Joseph Steele , Brian Thomas Thompson
IPC分类号： B29C64/357 , B29C64/124 , B29C64/245 , B33Y10/00 , B33Y30/00 , B33Y40/00
CPC分类号： B29C64/357 , B29C64/124 , B29C64/245 , B33Y10/00 , B33Y30/00 , B33Y40/00
摘要： An additive manufacturing apparatus can include a stage configured to hold one or more cured layers of resin that form a component. A radiant energy device can be operable to generate and project radiant energy in a patterned image. An actuator can be configured to change a relative position of the stage relative to the radiant energy device. A reclamation system can be downstream of the stage and can be configured to remove at least a portion of the resin from a resin support. The reclamation system can include a first collection structure configured to accept a resin support along a resin support movement direction. A first scraper is positioned within the first collection structure. The first scraper has an elongation axis that is offset from the resin support movement direction by an offset angle that is less than 90 degrees.
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公开(公告)号：US12042848B2
公开(公告)日：2024-07-23
申请号：US18079979
申请日：2022-12-13
发明人： Daniel Endecott Osgood , Evin Nathaniel Barber , Brian Patrick Peterson , Xi Yang , Christopher D. Barnhill , Brian David Przeslawski
摘要： A casting assembly includes at least a first body and a second body. The first body can be a core and the second body can be a shell. The first body has a first interior surface and a first exterior surface. The second body has a second interior surface spaced from a second exterior surface. A portion of the second interior surface is spaced from and facing the first exterior surface. The first body having a casting hollow, where the casting hollow is at least partially defined by the first interior surface.
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公开(公告)号：US11958250B2
公开(公告)日：2024-04-16
申请号：US17837302
申请日：2022-06-10
发明人： Meredith Elissa Dubelman , Christopher David Barnhill , Xi Yang , William Joseph Steele , Brian Thomas Thompson
IPC分类号： B29C64/357 , B29C64/124 , B29C64/245 , B33Y10/00 , B33Y30/00 , B33Y40/00
CPC分类号： B29C64/357 , B29C64/124 , B29C64/245 , B33Y10/00 , B33Y30/00 , B33Y40/00
摘要： An additive manufacturing apparatus can include a stage configured to hold one or more cured layers of resin that form a component. A radiant energy device can be operable to generate and project radiant energy in a patterned image. An actuator can be configured to change a relative position of the stage relative to the radiant energy device. A reclamation system can be downstream of the stage and can be configured to remove at least a portion of the resin from a resin support. The reclamation system can include a first collection structure configured to accept a resin support therethrough along a resin support movement direction. A first scraper is positioned within the first collection structure. The first scraper has an elongation axis that is offset from the resin support movement direction by an offset angle that is less than 90 degrees.
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公开(公告)号：US11919233B2
公开(公告)日：2024-03-05
申请号：US17889852
申请日：2022-08-17
发明人： Mary Kathryn Thompson , Arunkumar Natarajan , Kwok Pong Chan , Vadim Bromberg , Xi Yang , Ananda Barua , William C. Alberts
IPC分类号： B29C64/165 , B29C64/209 , B29C64/336 , B29K105/00 , B33Y10/00
CPC分类号： B29C64/165 , B29C64/209 , B29C64/336 , B33Y10/00 , B29K2105/0002 , B29K2105/0073 , B29K2995/0082
摘要： Various embodiments provide a method of additively manufacturing a part including depositing a layer of a powder on a working surface, depositing a binder solution on the layer of the powder at first locations, and depositing a sintering aid solution on the layer of the powder at second locations. The sintering aid solution comprises a sintering aid in a solvent. In various embodiments, the sintering aid enables an increased brown strength as compared to parts containing unbound powder. The method enables binders that provide high green strength to be used at the edges of the part, while also balancing a shortened debind time with an increased brown strength. Embodiments in which binder solution is deposited according to a predetermined pattern at second locations are also described.
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