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1
US10183331B2
Publication/Patent Number: US10183331B2
Publication date: 2019-01-22
Application number: 14/897,877
Filing date: 2014-06-11
Abstract: A method manufactures a metal alloy part by spark plasma sintering. The method includes the simultaneous application, inside a die, of a uniaxial pressure and of an electric current to a powder component material that has the following composition: 42 to 49% aluminum, 0.05 to 1.5% boron, at least 0.2% of at least one element selected from tungsten, rhenium and zirconium, optionally 0 to 5% of one or more elements selected from chromium, niobium, molybdenum, silicon and carbon, the balance being titanium and the total of the elements without aluminum and titanium being between 0.25 and 12%. A method manufactures a metal alloy part by spark plasma sintering. The method includes the simultaneous application, inside a die, of a uniaxial pressure and of an electric current to a powder component material that has the following composition: 42 to 49% aluminum, 0.05 to ...more ...less
2
US10182884B2
Publication/Patent Number: US10182884B2
Publication date: 2019-01-22
Application number: 13/869,406
Filing date: 2013-04-24
Abstract: A system for debinding a green body in the form of an orthodontic appliance may include a pressure vessel configured to contain a supercritical fluid. A source of a fluid chemical may be coupled to the pressure vessel to supply the fluid chemical to the pressure vessel. A heat source may be configured to heat the fluid chemical. A pump may pressurize the fluid chemical to at least the supercritical pressure. A collection vessel is coupled to the pressure vessel to capture the binder removed from the green bodies as at least the pressure of the supercritical fluid is reduced. A method of manufacturing an orthodontic appliance includes exposing green bodies including particles and a binder to a supercritical fluid to remove at least some of the binder from the green bodies, and collecting the removed binder from the supercritical fluid as the supercritical fluid transitions to a non-supercritical fluid. A system for debinding a green body in the form of an orthodontic appliance may include a pressure vessel configured to contain a supercritical fluid. A source of a fluid chemical may be coupled to the pressure vessel to supply the fluid chemical to the pressure vessel. A heat ...more ...less
3
US10302375B2
Publication/Patent Number: US10302375B2
Publication date: 2019-05-28
Application number: 15/305,262
Filing date: 2015-04-23
Abstract: An aluminum-diamond composite that exhibits both high thermal conductivity and a coefficient of thermal expansion close to that of semiconductor devices, and that can suppress the occurrence of swelling, etc., of a surface metal layer portion even in actual use under a high load. An aluminum-diamond composite includes 65-80 vol % of a diamond powder having a roundness of at least 0.94, for which a first peak in a volumetric distribution of grain size lies at 5-25 μm, and a second peak lies at 55-195 μm, and a ratio between the area of the volumetric distribution of grain sizes of 1-35 μm and the area of the volumetric distribution of grain sizes of 45-205 μm is from 1:9 to 4:6; the balance being composed of a metal containing aluminum. An aluminum-diamond composite that exhibits both high thermal conductivity and a coefficient of thermal expansion close to that of semiconductor devices, and that can suppress the occurrence of swelling, etc., of a surface metal layer portion even in actual use under a high ...more ...less
4
US10265769B2
Publication/Patent Number: US10265769B2
Publication date: 2019-04-23
Application number: 15/299,788
Filing date: 2016-10-21
Abstract: A three-dimensional fabricating apparatus includes a fabrication chamber, a supply chamber, a flattening unit, and a controller. In the fabrication chamber, powder is layered to form a powder layer and bonded together in a desired shape to form a layered fabrication object. The supply chamber stores the powder. The flattening unit is reciprocally movable above the supply chamber and the fabrication chamber, to transfer the powder and flatten the powder in the fabrication chamber to form the powder layer. The controller is configured to control the flattening unit to move in a first direction to transfer and supply the powder from the supply chamber to the fabrication chamber. The controller is configured to control the flattening unit to move in a second direction opposite the first direction to form the powder layer and transfer an unused portion of the powder from the fabrication chamber to the supply chamber. A three-dimensional fabricating apparatus includes a fabrication chamber, a supply chamber, a flattening unit, and a controller. In the fabrication chamber, powder is layered to form a powder layer and bonded together in a desired shape to form a layered fabrication object. The ...more ...less
5
US10195662B2
Publication/Patent Number: US10195662B2
Publication date: 2019-02-05
Application number: 14/440,457
Filing date: 2014-06-25
Abstract: An example insulation enclosure includes a support structure having a top end, a top wall provided at the top end, a bottom end, and an opening defined at the bottom end for receiving a mold within an interior of the support structure. Rigid insulation material may be supported by the support structure and extending between the top and bottom ends and across the top end. The rigid insulation material may extend between the top and bottom ends and consist of one or more sidewall insulation loops that extend along a circumference of the insulation enclosure. An example insulation enclosure includes a support structure having a top end, a top wall provided at the top end, a bottom end, and an opening defined at the bottom end for receiving a mold within an interior of the support structure. Rigid insulation material may be supported ...more ...less
6
US10195667B2
Publication/Patent Number: US10195667B2
Publication date: 2019-02-05
Application number: 14/948,726
Filing date: 2015-11-23
Assignee: Delavan Inc.
Abstract: A method includes placing an additively manufactured article having one or more internal channels in a non-reactive liquid to remove remainder powder from within the one or more internal channels, wherein the non-reactive liquid is a gas at room temperature and/or pressure. Placing the additively manufactured article in the non-reactive liquid includes can include placing the additively manufactured article in liquid nitrogen. A method includes placing an additively manufactured article having one or more internal channels in a non-reactive liquid to remove remainder powder from within the one or more internal channels, wherein the non-reactive liquid is a gas at room temperature and/or pressure ...more ...less
7
US10354905B2
Publication/Patent Number: US10354905B2
Publication date: 2019-07-16
Application number: 15/557,202
Filing date: 2016-03-02
Assignee: NV BEKAERT SA
Abstract: Carrier onto which a wafer can be temporarily bonded. The carrier comprises a plate shaped laminate. The plate shaped laminate comprises a first layer. The first layer comprises a metal foil or a metal sheet. The plate shaped laminate comprises a second layer comprising a porous metal medium with three-dimensional open pores. The porous metal medium comprises metal fibers. The first layer is permanently bonded to the porous metal medium thereby closing the pores of the porous metal medium at the side where the first layer is located. Carrier onto which a wafer can be temporarily bonded. The carrier comprises a plate shaped laminate. The plate shaped laminate comprises a first layer. The first layer comprises a metal foil or a metal sheet. The plate shaped laminate comprises a second layer comprising a porous ...more ...less
8
US10352670B2
Publication/Patent Number: US10352670B2
Publication date: 2019-07-16
Application number: 14/320,961
Filing date: 2014-07-01
Inventor: Burrow, Lonnie  
Abstract: One embodiment of the present invention provides a polymeric ammunition cartridge and methods of making and using the same. The cartridge includes a substantially cylindrical insert connected to a substantially cylindrical polymeric middle body. The substantially cylindrical insert includes a top surface opposite a bottom surface and a substantially cylindrical coupling element that extends from the bottom surface, a primer recess in the top surface that extends toward the bottom surface, a primer flash hole positioned in the primer recess to extend through the bottom surface, and a flange that extends circumferentially about an outer edge of the top surface. The substantially cylindrical polymeric middle body includes a substantially cylindrical polymeric bullet-end and a substantially cylindrical polymeric coupling end connected by a powder chamber, wherein the substantially cylindrical polymeric coupling end extends over the substantially cylindrical coupling element and covers a circumferential surface of the primer flash hole. One embodiment of the present invention provides a polymeric ammunition cartridge and methods of making and using the same. The cartridge includes a substantially cylindrical insert connected to a substantially cylindrical polymeric middle body. The substantially cylindrical ...more ...less
9
US2019060997A1
Publication/Patent Number: US2019060997A1
Publication date: 2019-02-28
Application number: 16/170,803
Filing date: 2018-10-25
Abstract: Additive fabrication systems generally use support structures to expand the available range of features and geometries in fabricated objects. For example, when a vertical shelf or cantilever extends from an object, a supplemental support structure may be required to provide a surface for fabrication thereon. This process may become more difficult when, e.g., a part will be subjected to downstream processing steps such as debinding or sintering that impose different design rules. To address these challenges and provide a greater range of flexibility and processing speed, it may be useful in certain circumstances to independently fabricate the object and support structures, and then assemble these structures into a composite item for debinding and sintering. This approach also advantageously facilitates various techniques for spraying, dipping, or otherwise applying a release layer between the support structure and the part so that these separate items do not become fused together during sintering. Additive fabrication systems generally use support structures to expand the available range of features and geometries in fabricated objects. For example, when a vertical shelf or cantilever extends from an object, a supplemental support structure may be required to provide a ...more ...less
10
US2019063371A1
Publication/Patent Number: US2019063371A1
Publication date: 2019-02-28
Application number: 16/101,000
Filing date: 2018-08-10
Abstract: Provided herein are various improvements to rocket engine components and rocket engine operational techniques. In one example, a rocket engine propellant injection apparatus is provided that includes a manifold formed into a single body by an additive manufacturing process and comprising a fuel cavity and an oxidizer cavity. The manifold also includes one or more propellant feed stubs, the one or more propellant feed stubs protruding from the manifold and formed into the single body of the manifold by the additive manufacturing process, with at least a first stub configured to carry fuel to the fuel cavity and at least a second stub configured to carry oxidizer to the oxidizer cavity. The manifold also includes a plurality of injection features formed by apertures in a face of the manifold, ones of the plurality of injection features configured to inject the fuel and the oxidizer for combustion. Provided herein are various improvements to rocket engine components and rocket engine operational techniques. In one example, a rocket engine propellant injection apparatus is provided that includes a manifold formed into a single body by an additive manufacturing process and ...more ...less
11
US2019022751A1
Publication/Patent Number: US2019022751A1
Publication date: 2019-01-24
Application number: 16/141,685
Filing date: 2018-09-25
Assignee: Arcam AB
Abstract: The present invention relates to a method for forming a three-dimensional article through successively depositing individual layers of powder material that are fused together so as to form the article, the method comprising the step of heating a first portion of a support surface while depositing a layer of powder material on a second portion of the support surface. The present invention relates to a method for forming a three-dimensional article through successively depositing individual layers of powder material that are fused together so as to form the article, the method comprising the step of heating a first portion of a support ...more ...less
12
US2019091767A1
Publication/Patent Number: US2019091767A1
Publication date: 2019-03-28
Application number: 16/081,723
Filing date: 2017-03-03
Abstract: A molding die includes a first die having a through-hole; a second die inserted into the through-hole and configured to be movable relative to the first die; and first and second punches configured to be insertable into the through-hole, wherein an undercut molding part is provided on the second die, and a molding target is compression-molded in a cavity surrounded by inner side walls of the through-hole, the second die, the first punch, and the second punch. A molding die includes a first die having a through-hole; a second die inserted into the through-hole and configured to be movable relative to the first die; and first and second punches configured to be insertable into the through-hole, wherein an undercut molding part is ...more ...less
13
US2019054527A1
Publication/Patent Number: US2019054527A1
Publication date: 2019-02-21
Application number: 15/680,733
Filing date: 2017-08-18
Abstract: A method of binder jet printing a part including depositing a layer of a powder on a working surface of a binder jet printer and selectively printing a binder solution having a linkable thermoplastic binder into the layer of the powder in a pattern to generate a printed layer. The pattern is representative of a structure of a layer of the part. The linkable thermoplastic binder includes a first polymer strand and a second polymer strand, the first polymer strand includes a first functional group and the second polymer strand includes a second functional group, and the first and second functional groups non-covalently couple the first polymer strand with the second polymer strand. The method of binder jet printing a part also includes curing the linkable thermoplastic binder in the printed layer to generate a layer of a green body part, heating the green body part above a first temperature to remove at least a portion of the linkable thermoplastic binder and generate a brown body part, and heating the brown body part above a second temperature to sinter the powder to generate the part. The part is substantially free of char residue. A method of binder jet printing a part including depositing a layer of a powder on a working surface of a binder jet printer and selectively printing a binder solution having a linkable thermoplastic binder into the layer of the powder in a pattern to generate a printed layer ...more ...less
14
US2019032416A1
Publication/Patent Number: US2019032416A1
Publication date: 2019-01-31
Application number: 15/662,821
Filing date: 2017-07-28
Abstract: An earth-boring tool includes a movable component and an additive manufacturing formed flow control device in fluid communication with the movable component and configured to control a flowrate of the hydraulic fluid through the additive manufacturing formed flow control device, wherein the additive manufacturing formed flow control device is configured to control a movement of the movable component via the flowrate of hydraulic fluid through the additive manufacturing formed flow control device. An earth-boring tool includes an additive manufacturing formed flow control device in fluid communication with one or more components of the earth-boring tool and configured to provide a cooling fluid to the one or more components of the earth-boring tool. An earth-boring tool includes a movable component and an additive manufacturing formed flow control device in fluid communication with the movable component and configured to control a flowrate of the hydraulic fluid through the additive manufacturing formed flow control device ...more ...less
15
US2019126551A1
Publication/Patent Number: US2019126551A1
Publication date: 2019-05-02
Application number: 16/089,092
Filing date: 2016-08-31
Abstract: Powder distribution in additive manufacturing may include systems or methods to distribute powder from an intermediate buffer or reservoir while scanning over a stage with the buffer or reservoir.
16
US2019152158A1
Publication/Patent Number: US2019152158A1
Publication date: 2019-05-23
Application number: 16/196,926
Filing date: 2018-11-20
Abstract: A projector or system for assisting in a removal of 3D printed molds from a print chamber. The projector is operative to receive a file in a format compatible for a 3D printer. The projector further receives input corresponding to a location of the prototype contained in a powder box and input corresponding to a profile of powder contained across a surface of the associated powder box. Using the location, a portion of the prototype located immediately beneath a surface of powder in the powder box is determined. A distance of the portion to a selected region of the top surface is also determined. A cue is generated based on the distance. The projector generates an image of the extracted layer and projects the image onto the surface of the associated powder box. The image comprises at least one color coded region within a proximity of the portion, where a color of the color coded region is based on the cue. A projector or system for assisting in a removal of 3D printed molds from a print chamber. The projector is operative to receive a file in a format compatible for a 3D printer. The projector further receives input corresponding to a location of the prototype contained in a ...more ...less
17
US2019153869A1