# US 11,305,355 B2 · High temperature, high pressure, powder-based, 3D printed object manufacturing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,305,355 B2 - Document ID: US11305355B2 - Status: Granted - Kind: B2 - Application number: 17/244,464 - Filed: 2021-04-29 - Published: 2021-11-25 - Granted: 2022-04-19 - Earliest claimed: 2020-05-21 - Assignees: Kilncore Inc. - Applicants: Kilncore Inc. - Inventors: Antoine Missout - Web page: https://patentgrep.com/patent/US11305355B2 ## CPC - B22F 10/20: Direct sintering or melting - B22F 10/34: of powder characteristics, e.g. density, oxidation or flowability - B22F 3/14: simultaneously - B22F 3/16: in successive or repeated steps - B22F 10/32: of the atmosphere, e.g. composition or pressure in a building chamber - B22F 10/85: for controlling or regulating additive manufacturing processes - B22F 12/17: to heat the build chamber or platform - B22F 12/20: Cooling means - B22F 12/224: {for motion along a direction within the plane of a layer} - B22F 12/33: translatory in the deposition plane - B22F 12/38: {Housings, e.g. machine housings} - B22F 12/53: Nozzles - B22F 12/57: Metering means - B22F 12/58: for changing the material composition, e.g. by mixing - B22F 12/70: Gas flow means - B22F 12/86: Serial processing with multiple devices grouped - B22F 12/90: Means for process control, e.g. cameras or sensors - B29C 64/153: using layers of powder being selectively joined, e.g. by selective laser sintering or melting - B30B 11/002: {Isostatic press chambers; Press stands therefor} - B30B 11/004: {involving the use of very high pressures, (for the formation of artificial diamonds or boronitrides B01J3/065)} - B33Y 10/00: Processes of additive manufacturing - B33Y 30/00: Apparatus for additive manufacturing; Details thereof or accessories therefor - B33Y 40/00: Auxiliary operations or equipment, e.g. for material handling - B33Y 50/02: for controlling or regulating additive manufacturing processes - B22F 12/55: Two or more means for feeding material - B22F 2999/00: Aspects linked to processes or compositions used in powder metallurgy - Y02P 10/25: Process efficiency - B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B30B: PRESSES IN GENERAL (producing ultra-high pressure or ultra-high pressure and high temperature to effect modifications of a substance, e.g. for making artificial diamonds B01J3/00 ){(compressing means for refuse receptacles B65F1/1405)} - B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract An additive manufacturing device (AMD) for manufacturing objects through deposition of superposed layers of material in a granulate or powder form, the AMD comprising: a hydraulic cylinder; a mold for sealable attachment to the hydraulic cylinder; a material deposition station having an outlet for depositing the material in the mold layer-by-layer; a heating element; and a compressor. Between the deposition of one or more layers of material in the mold, the mold and the hydraulic cylinder are sealably attached to form a pressure container, the compressor injects gas in the container to increase a pressure within the pressure container and the heating element provides heat within the pressure container to further increase the pressure and to perform sintering or high-temperature synthesis of the material while submitting the material to the pressure. ## Claims ### Claim 1 A method for manufacturing objects made of superposed subsequent depositions of layers of material on top of each other, the method comprising steps of: depositing one or more layers of material inside a mold; pressurizing the inside of the mold; heating the inside of the mold thereby sintering or synthesizing the material with heat; depressurizing the mold; and repeating at least once the depositing over the previous deposited one of more layers of material, and repeating the steps of the pressurizing, the heating and the depressurizing. ### Claim 2 (depends on 1) The method of claim 1, wherein the pressurizing the inside of the mold comprises sealably closing the mold and injecting pressurized gas inside the mold. ### Claim 3 (depends on 2) The method of claim 2, wherein the layers of material comprise a top layer, and wherein the heating the inside of the mold comprises using a heat element above the top layer of material to heat the one or more layers of material and the pressured gas. ### Claim 4 (depends on 1) The method of claim 1, further comprising performing the depositing at a material deposition station and the pressurizing, heating and depressurizing at one of a heating station, a sintering station, and a synthesizing station. ### Claim 5 (depends on 1) The method of claim 1, wherein the pressurizing the inside of the mold comprises injecting gas into the mold under of pressure of at least 20 kpsi, wherein the pressure of the gas inside the mold increases further when heating the inside of the mold. ### Claim 6 (depends on 1) The method of claim 1, wherein the depositing of one or more layers of material comprises depositing a single layer of material. ### Claim 7 (depends on 1) The method of claim 1, further comprising a step of moving the mold between at least a first station and a second station distant from each other wherein at least a first one of the steps of the method is performed at the first station and a second one of the steps of the method is performed at the second station. ### Claim 8 (depends on 1) The method of claim 1, wherein the step of depositing one or more layers of material comprises feeding the material using an actively cooled material-feeding component. ### Claim 9 (depends on 1) The method of claim 1, further comprising providing the mold, comprising stacking plates to provide the mold. ### Claim 10 (depends on 9) The method of claim 9, wherein the step of stacking plates comprises stacking a new plate on top of another plate before depositing a subsequent layer of material. ### Claim 11 (depends on 9) The method of claim 9, further comprising inserting a seal between two of the plates. ### Claim 12 (depends on 9) The method of claim 9, wherein providing the mold comprises mounting a refractory sleeve inside an external structure. ### Claim 13 (depends on 9) The method of claim 9, wherein the mold as a top and a bottom, and wherein providing the mold comprises providing a cooling plate mounted about one of the top and the bottom of the mold. ### Claim 14 (depends on 9) The method of claim 9, wherein providing the mold comprises providing a diffusion plate in communication with space enclosed in the mold, wherein the diffusion plate participates in lowering pressure of the enclosed space. ### Claim 15 (depends on 1) The method of claim 1, wherein the material comprises a first material in contact with a second material, wherein the first material and the second material, upon heating, react with each other to generate a new material. ### Claim 16 (depends on 1) The method of claim 1, wherein the material comprises a first material and a second material, wherein the first material and the second are deposited at distinct locations in the mold. ### Claim 17 (depends on 1) The method of claim 1, further comprising depositing lubricant over a portion of the mold at least one of before depositing a layer of material, and before depositing another one of the at least one layer of material.