# US 2017/0282245 A1 · Three-dimensional modeling apparatus, three-dimensional model body manufacturing method, and three-dimensional modeling data > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0282245 A1 - Document ID: US20170282245A1 - Status: Published application - Kind: A1 - Application number: 15/464,636 - Filed: 2017-03-21 - Published: 2017-10-05 - Earliest claimed: 2016-03-30 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Shinya Yasuda; Kimihiro Fujimoto; Dexu Zhang; Takamune Suzuki; Toshihiro Takai; Yutaka Takahashi; Takahiro Harigae - Web page: https://patentgrep.com/patent/US20170282245A1 ## CPC - B29C 64/153: using layers of powder being selectively joined, e.g. by selective laser sintering or melting - B22F 10/20: Direct sintering or melting - B22F 10/366: Scanning parameters, e.g. hatch distance or scanning strategy - B22F 12/41: characterised by the type, e.g. laser or electron beam - B22F 12/70: Gas flow means - B29C 64/371: using an environment other than air, e.g. inert gas - B33Y 10/00: Processes of additive manufacturing - B33Y 30/00: Apparatus for additive manufacturing; Details thereof or accessories therefor - B22F 10/10: Formation of a green body - B22F 10/32: of the atmosphere, e.g. composition or pressure in a building chamber - B22F 12/63: Rollers - Y02P 10/25: Process efficiency - 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) - 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 - 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 In a three-dimensional modeling apparatus, diffusion of fumes generated around the modeling stage accompanying irradiation with an energy beam can be efficiently prevented. Three-dimensional modeling is performed by repeating scanning a modeling material arranged on a modeling stage with laser light to form a solidified layer. A cover is provided that locally surrounds an irradiation portion on the modeling material arranged on the modeling stage irradiated with the laser light, and suppresses diffusion of the fumes caused by irradiation with the laser light. In the cover, a stream of gas containing the fumes is regulated so as to cause the fumes to flow toward an upward portion inside the cover apart from the irradiated portion irradiated with the laser light. ## Claims ### Claim 1 A three-dimensional modeling apparatus that performs three-dimensional modeling by repeatedly scanning a modeling material arranged on a modeling stage with an energy beam to form a solidified layer, comprising: a cover that includes an energy beam transmitting portion that allows the energy beam to pass, locally surrounds a portion of the modeling material arranged on the modeling stage irradiated with the energy beam, and suppresses diffusion of fumes generated by irradiation of the energy beam; and a stream regulating mechanism that regulates a stream of gas containing the fumes so as to cause the fumes to be apart from the portion of the modeling material irradiated with the energy beam. ### Claim 2 A three-dimensional modeling apparatus that performs three-dimensional modeling by repeatedly scanning a modeling material arranged on a modeling stage with an energy beam to form a solidified layer, comprising: a cover that includes an energy beam transmitting portion that allows the energy beam to pass, locally surrounds a portion of the modeling material arranged on the modeling stage irradiated with the energy beam, and suppresses diffusion of fumes generated by irradiation of the energy beam; and a stream regulating mechanism that regulates a stream of gas containing the fumes so as to cause the fumes to be apart upwardly from the portion of the modeling material irradiated with the energy beam in the cover toward an upper portion of the cover. ### Claim 3 (depends on 1) The three-dimensional modeling apparatus according to claim 1, wherein the cover includes a side wall that is formed so as to surround an upper structure including the stream regulating mechanism inside the cover, and a periphery of a portion lower than the upper structure, with at least a part of the side wall on a side facing the modeling stage being open. ### Claim 4 (depends on 3) The three-dimensional modeling apparatus according to claim 3, wherein the stream regulating mechanism includes: a gas stream path formed by an outer partition and an inner partition that each include the energy beam transmitting portion at a corresponding position; and a gas communicating path that causes an inside and an outside of the cover to communicate with each other, and the stream of the gas containing the fumes is regulated by adjusting a pressure in the gas stream path through the gas communicating path. ### Claim 5 (depends on 4) The three-dimensional modeling apparatus according to claim 4, wherein the gas communicating path is open to the gas stream path, and the stream of the gas containing the fumes is regulated by exhausting the gas in the gas stream path through the gas communicating path and causing a negative pressure in the gas stream path. ### Claim 6 (depends on 4) The three-dimensional modeling apparatus according to claim 4, wherein a first gas communicating path and a second gas communicating path are provided as the gas communicating path, and the stream of the gas containing the fumes is regulated by supplying gas through the first gas communicating path and exhausting gas through the second gas communicating path. ### Claim 7 (depends on 6) The three-dimensional modeling apparatus according to claim 6, wherein the gas stream path includes a narrow path that increases a flow velocity of the gas at an upstream portion of the gas flowing from the first gas communicating path toward the second gas communicating path with respect to the energy beam transmitting portion provided at either one of the outer partition or the inner partition, and generates a negative pressure at the upstream portion. ### Claim 8 (depends on 4) The three-dimensional modeling apparatus according to claim 4, wherein the energy beam transmitting portions of the outer partition and the inner partition are through-holes provided through the outer partition and the inner partition. ### Claim 9 (depends on 4) The three-dimensional modeling apparatus according to claim 4, wherein the energy beam transmitting portion at the outer partition is made of glass material that allows the energy beam to pass, and the energy beam transmitting portion at the inner partition is made of porous glass material. ### Claim 10 (depends on 9) The three-dimensional modeling apparatus according to claim 9, wherein the gas communicating path is open at a side wall of the cover at a position lower than the inner partition made of the porous glass material and higher than a lower edge of the cover. ### Claim 11 (depends on 4) The three-dimensional modeling apparatus according to claim 4, wherein inert gas is supplied from an inert gas supplying mechanism into the cover through a portion of the gas communicating path through which the gas is supplied toward an inside of the cover. ### Claim 12 (depends on 4) The three-dimensional modeling apparatus according to claim 4, wherein a portion of the gas communicating path through which the gas is exhausted toward an outside of the cover communicates with a fume collecting mechanism that collects the fumes. ### Claim 13 (depends on 1) The three-dimensional modeling apparatus according to claim 1, wherein the energy beam is laser light. ### Claim 14 (depends on 1) The three-dimensional modeling apparatus according to claim 1, further comprising a chamber that accommodates the modeling stage and the cover, and includes a light transmitting window that allows the energy beam emitted from a generation source arranged outside of the chamber to pass. ### Claim 15 A three-dimensional modeling apparatus that performs three-dimensional modeling by repeatedly scanning a modeling material arranged on a modeling stage with an energy beam to form a solidified layer, comprising: a cover that includes an energy beam transmitting portion that allows the energy beam to pass, locally surrounds an irradiation position on the modeling material arranged on the modeling stage irradiated with the energy beam, and suppresses diffusion of fumes generated by irradiation of the energy beam; and a moving device that moves the cover so as to allow the energy beam to pass through the energy beam transmitting portion, according to scanning with the energy beam. ### Claim 16 (depends on 15) The three-dimensional modeling apparatus according to claim 15, further comprising a chamber that accommodates the modeling stage and the cover, and includes a light transmitting window that allows the energy beam emitted from a generation source arranged outside of the chamber to pass. ### Claim 17 (depends on 15) The three-dimensional modeling apparatus according to claim 15, wherein the cover includes a side wall that is formed so as to surround an upper plate including the energy beam transmitting portion, and a periphery of a lower surface of the upper plate, and is open on a side facing the modeling stage. ### Claim 18 (depends on 15) The three-dimensional modeling apparatus according to claim 15, wherein, above the upper plate of the cover, a pressure chamber that has an opening through which gas is introduced from an outside of the cover is disposed. ### Claim 19 (depends on 18) The three-dimensional modeling apparatus according to claim 18, wherein the inert gas is supplied from an inert gas supplying mechanism through the opening to the pressure chamber. ### Claim 20 (depends on 15) The three-dimensional modeling apparatus according to claim 15, wherein multiple energy beam transmitting portions are formed at the cover along different directions. ### Claim 21 (depends on 15) The three-dimensional modeling apparatus according to claim 15, wherein the moving device moves the cover in one direction determined according to a scanning direction of the energy beam when moving the cover. ### Claim 22 (depends on 15) The three-dimensional modeling apparatus according to claim 15, wherein the moving device includes a rotational moving mechanism that rotates the cover so as to allow the energy beam to pass through the energy beam transmitting portion according to a direction of scanning with the energy beam. ### Claim 23 (depends on 15) The three-dimensional modeling apparatus according to claim 15, wherein the energy beam is laser light. ### Claim 24 (depends on 1) A three-dimensional model body manufacturing method, comprising manufacturing the three-dimensional model body using the three-dimensional modeling apparatus according to claim 1. ### Claim 25 (depends on 1) A three-dimensional model data installed in the three-dimensional modeling apparatus according to claim 1.