Patents by Inventor Hidetaka Oguma
Hidetaka Oguma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10974319Abstract: In a casting device, positions of discharge ends discharging cooling gas, of respective gas supply nozzles are adjusted in response to movement of a mold. This makes it possible to stably achieve high cooling performance for the mold by blowing of the cooling gas. To adjust the positions of the respective discharge ends, the gas supply nozzles are advanced or retreated, or are expanded or contracted. Further, a cooling chamber may include a radiation cooling portion that cools the mold by radiation, and the radiation cooling portion is disposed below the gas supply nozzles that are provided directly below a heat shielding body partitioning a heating chamber and the cooling chamber.Type: GrantFiled: March 9, 2017Date of Patent: April 13, 2021Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takeshi Kaneko, Masaki Taneike, Hidetaka Oguma
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Patent number: 10953463Abstract: In a casting device, when a mold varied in outer size depending on a position passes through a heat shielding portion between a heating chamber and a cooling chamber, a flexible portion of a heat shielding body is bent to fit the outer size of the mold.Type: GrantFiled: March 9, 2017Date of Patent: March 23, 2021Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takeshi Kaneko, Masaki Taneike, Hidetaka Oguma
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Patent number: 10259034Abstract: A slurry for forming a mold includes a silica sol as a dispersion medium and niobia-stabilized zirconia dispersed in the silica sol.Type: GrantFiled: March 4, 2015Date of Patent: April 16, 2019Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hidetaka Oguma, Kazutaka Mori, Ichiro Nagano, Masato Shida, Ikuo Okada, Ryota Okimoto, Yoshitaka Uemura
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Patent number: 10245636Abstract: A method for manufacturing a core (S1) includes: a coating step (S20) of adding an organic binder to a large particle group composed of silica-containing large particles, and coating surfaces of the large particles with the organic binder; a mixing step (S30) of mixing, after the coating step (S20), the large particle group and a small particle group composed of silica-containing small particles having a smaller particle size than the large particles; a laminate shaping step (S40) of forming, after the mixing step (S30), a molding in which a mixture of the large and small particle groups is used; and a sintering step (S60) of sintering the molding after the laminate shaping step (S40).Type: GrantFiled: March 5, 2015Date of Patent: April 2, 2019Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kosuke Fujiwara, Sachio Shimohata, Kazutaka Mori, Hidetaka Oguma, Ikuo Okada, Yoshitaka Uemura
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Publication number: 20190084038Abstract: In the casting device according to the present invention, when a mold varied in outer size depending on a position passes through a heat shielding portion between a heating chamber and a cooling chamber, a flexible portion of a heat shielding body is bent to fit an outer size of the mold. Accordingly, it is possible to minimize a gap between a wall surface of the mold and the heat shielding body and to effectively perform heat shield between the heating chamber and the cooling chamber. This prevents deterioration of cooling performance inside the cooling chamber to improve temperature gradient of a casting. As a result, it is possible to improve strength of a produced casting. Further, it is possible to reduce an amount of energy wastefully emitted to the cooling chamber, of energy emitted from a heater. This makes it possible to improve energy efficiency.Type: ApplicationFiled: March 9, 2017Publication date: March 21, 2019Inventors: Takeshi KANEKO, Masaki TANEIKE, Hidetaka OGUMA
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Publication number: 20190076919Abstract: In a casting device of the present invention, positions of discharge ends discharging cooling gas, of respective gas supply nozzles are adjusted in response to movement of a mold. This makes it possible to stably achieve high cooling performance for the mold by blowing of the cooling gas. To adjust the positions of the respective discharge ends, the gas supply nozzles are advanced or retreated, or are expanded or contracted. Further, a cooling chamber may include a radiation cooling portion that cools the mold by radiation, and the radiation cooling portion is disposed below the gas supply nozzles that are provided directly below a heat shielding body partitioning a heating chamber and the cooling chamber.Type: ApplicationFiled: March 9, 2017Publication date: March 14, 2019Inventors: Takeshi KANEKO, Masaki TANEIKE, Hidetaka OGUMA
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Patent number: 10208364Abstract: A Ni-based alloy comprises nitrides, of which an estimated largest size is an area-equivalent diameter of 12 ?m to 25 ?m, the estimated largest size of the nitrides being determined by calculating an area-equivalent diameter D which is defined as D=A1/2 in relation to an area A of a nitride with a largest size among nitrides present in a measurement field of view area S0 of an observation of the Ni-based alloy, repeatedly performing this operation for n times corresponding to a measurement field of view number n to acquire n pieces of data of the area-equivalent diameter D, arranging the pieces of data of area-equivalent diameter D in ascending order into D1, D2, . . .Type: GrantFiled: August 6, 2014Date of Patent: February 19, 2019Assignee: Hitachi Metals, Ltd.Inventors: Ikuo Okada, Masaki Taneike, Hidetaka Oguma, Yoshitaka Uemura, Daisuke Yoshida, Yoshiyuki Inoue, Masato Itoh, Kenichi Yaguchi, Tadashi Fukuda, Takanori Matsui
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Patent number: 10166598Abstract: A coating layer including solely silicon alkoxide or mixed alkoxide of silicon alkoxide and aluminum alkoxide is formed on a surface of a sintered precision-casting core body mainly including silica particles so as to seal holes formed in the surface. As a result, it is possible to prevent the breakage of the core during casting.Type: GrantFiled: May 28, 2014Date of Patent: January 1, 2019Assignee: MITSUBISH HEAVY INDUSTRIES, LTD.Inventors: Hidetaka Oguma, Kazutaka Mori, Ikuo Okada, Sachio Shimohata
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Patent number: 9816161Abstract: Provided is a Ni-based single crystal superalloy containing 6% by mass or more and 12% by mass or less of Cr, 0.4% by mass or more and 3.0% by mass or less of Mo, 6% by mass or more and 10% by mass or less of W, 4.0% by mass or more and 6.5% by mass or less of Al, 0% by mass or more and 1% by mass or less of Nb, 8% by mass or more and 12% by mass or less of Ta, 0% by mass or more and 0.15% by mass or less of Hf, 0.01% by mass or more and 0.2% by mass or less of Si, and 0% by mass or more and 0.04% by mass or less of Zr, and optionally containing at least one element selected from B, C, Y, La, Ce, and V, with a balance being Ni and inevitable impurities.Type: GrantFiled: July 30, 2013Date of Patent: November 14, 2017Assignees: MITSUBISHI HITACHI POWER SYSTEMS, LTD., NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Kyoko Kawagishi, Hiroshi Harada, Tadaharu Yokokawa, Yutaka Koizumi, Toshiharu Kobayashi, Masao Sakamoto, Michinari Yuyama, Masaki Taneike, Ikuo Okada, Sachio Shimohata, Hidetaka Oguma, Ryota Okimoto, Keizo Tsukagoshi, Yoshitaka Uemura, Junichiro Masada, Shunsuke Torii
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Publication number: 20170028461Abstract: A method for manufacturing a core (S1) includes: a coating step (S20) of adding an organic binder to a large particle group composed of silica-containing large particles, and coating surfaces of the large particles with the organic binder; a mixing step (S30) of mixing, after the coating step (S20), the large particle group and a small particle group composed of silica-containing small particles having a smaller particle size than the large particles; a laminate shaping step (S40) of forming, after the mixing step (S30), a molding using to a laminate shaping method in which a mixture of the large and small particle groups is used; and a sintering step (S60) of sintering the molding after the laminate shaping step (S40).Type: ApplicationFiled: March 5, 2015Publication date: February 2, 2017Inventors: Kosuke FUJIWARA, Sachio SHIMOHATA, Kazutaka MORI, Hidetaka OGUMA, Ikuo OKADA, Yoshitaka UEMURA
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Publication number: 20160354836Abstract: A slurry for forming a mold includes a silica sol as a dispersion medium and niobia-stabilized zirconia dispersed in the silica sol.Type: ApplicationFiled: March 4, 2015Publication date: December 8, 2016Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hidetaka OGUMA, Kazutaka MORI, Ichiro NAGANO, Masato SHIDA, Ikuo OKADA, Ryota OKIMOTO, Yoshitaka UEMURA
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Publication number: 20160177423Abstract: A Ni-based alloy comprises nitrides, of which an estimated largest size is an area-equivalent diameter of 12 ?m to 25 ?m, the estimated largest size of the nitrides being determined by calculating an area-equivalent diameter D which is defined as D=A1/2 in relation to an area A of a nitride with a largest size among nitrides present in a measurement field of view area S0 of an observation of the Ni-based alloy, repeatedly performing this operation for n times corresponding to a measurement field of view number n to acquire n pieces of data of the area-equivalent diameter D, arranging the pieces of data of area-equivalent diameter D in ascending order into D1, D2, . . .Type: ApplicationFiled: August 6, 2014Publication date: June 23, 2016Inventors: Ikuo OKADA, Masaki TANEIKE, Hidetaka OGUMA, Yoshitaka UEMURA, Daisuke YOSHIDA, Yoshiyuki INOUE, Masato ITOH, Kenichi YAGUCHI, Tadashi FUKUDA, Takanori MATSUI
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Publication number: 20160121390Abstract: A coating layer including solely silicon alkoxide or mixed alkoxide of silicon alkoxide and aluminum alkoxide is formed on a surface of a sintered precision-casting core body mainly including silica particles so as to seal holes formed in the surface. As a result, it is possible to prevent the breakage of the core during casting.Type: ApplicationFiled: May 28, 2014Publication date: May 5, 2016Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hidetaka OGUMA, Kazutaka MORI, Ikuo OKADA, Sachio SHIMOHATA
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Publication number: 20160114384Abstract: A precision-casting core body is formed by mixing and sintering silica particles and silica fume. The resistance of the mixture of silica fume decreases during heating injection molding, and hence the fluidity is improved by the addition of silica fume. As a result, since the fluidity is improved, it is possible to decrease an injection molding pressure when a core is manufactured. Further, the mixture can be applied to a thin compact and a complex compact with improved fluidity.Type: ApplicationFiled: May 28, 2014Publication date: April 28, 2016Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hidetaka OGUMA, Kazutaka MORI, Ikuo OKADA, Sachio SHIMOHATA
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Publication number: 20160101462Abstract: A coating layer including solely silicon alkoxide or mixed alkoxide of silicon alkoxide and aluminum alkoxide is formed on a surface of a sintered precision-casting core body mainly including silica particles so as to seal holes formed in the surface. As a result, it is possible to prevent the breakage of the core during casting.Type: ApplicationFiled: May 28, 2014Publication date: April 14, 2016Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hidetaka OGUMA, Kazutaka MORI, Ikuo OKADA, Sachio SHIMOHATA
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Publication number: 20150283601Abstract: Provided is a precision casting mold to be used to produce a cast product. The precision casting mold includes a core having a shape corresponding to an internal hollow portion of the cast product and an outer mold corresponding to a shape of an outer peripheral surface of the cast product, and the outer mold is made up of: a prime layer which is formed on an inner peripheral surface and is formed from a slurry film obtained by drying slurry for the precision casting mold including mono-dispersed alumina (Al2O3) ultrafine particles having a particle size of 1.0 ?m or smaller; and a multi-layered backup layer which is formed on the outside of the prime layer by repeatedly forming a first backup layer obtained by forming and drying a slurry layer formed from the slurry for the precision casting mold and a stucco layer in which a stucco material is adhered to the slurry layer.Type: ApplicationFiled: October 7, 2013Publication date: October 8, 2015Inventors: Hidetaka Oguma, Kazutaka Mori, Ikuo Okada, Sachio Shimohata
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Publication number: 20150273571Abstract: Provided is a precision casting mold to be used to produce a cast product. The precision casting mold includes a core having a shape corresponding to an internal hollow portion of the cast product and an outer mold corresponding to a shape of an outer peripheral surface of the cast product, and the outer mold is made up of: a prime layer which is formed on an inner peripheral surface and is formed from a slurry film obtained by drying slurry for the precision casting mold including mono-dispersed ultrafine alumina particles having a particle size of 1.0 ?m or smaller; and a multi-layered backup layer which is formed on the outside of the prime layer by repeatedly forming a first backup layer obtained by forming and drying a slurry layer formed from the slurry for the precision casting mold and a stucco layer in which silicon carbide (SiC) as a stucco material is adhered to the slurry layer.Type: ApplicationFiled: October 7, 2013Publication date: October 1, 2015Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Hidetaka Oguma, Kazutaka Mori, Ikuo Okada, Sachio Shimohata
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Publication number: 20150266085Abstract: Provided is a precision casting mold to be used to produce a cast product. The precision casting mold includes a core having a shape corresponding to an internal hollow portion of the cast product and an outer mold corresponding to a shape of an outer peripheral surface of the cast product, and the outer mold is made up of: a prime layer (first dried film) (101A) which is formed on an inner peripheral surface and is formed from a slurry film obtained by drying slurry for the precision casting mold including mono-dispersed ultrafine zirconia particles having a particle size of 1.0 ?m or smaller (preferably, 0.3 to 0.5 ?m, disclosed in Examples); and a multi-layered backup layer (105A) which is formed on the outside of the prime layer (first dried film) (101A) by repeatedly forming a backup layer (second dried film) (104-1) obtained by forming and drying a slurry layer (102) formed from the slurry for the precision casting mold and a stucco layer (103) in which a stucco material is adhered to the slurry layer.Type: ApplicationFiled: October 7, 2013Publication date: September 24, 2015Inventors: Hidetaka Oguma, Kazutaka Mori, Ikuo Okada, Sachio Shimohata
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Publication number: 20150224569Abstract: Provided is a precision casting mold including a core having a shape corresponding to an internal hollow portion of a cast product and an outer mold corresponding to a shape of an outer peripheral surface of the cast product, and the outer mold is made up of: a prime layer which is formed on an inner peripheral surface and is a slurry film obtained by drying slurry for the precision casting mold which includes mono-dispersed ultrafine alumina particles and silica sol having a particle size of 1.0 ?m or smaller and functions as mullite during firing; and a multi-layered backup layer which is formed on the outside of the prime layer by repeatedly forming a first backup layer obtained by forming and drying a slurry layer formed from the slurry for the precision casting mold and a stucco layer in which a stucco material is adhered to the slurry layer.Type: ApplicationFiled: October 7, 2013Publication date: August 13, 2015Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Hidetaka Oguma, Kazutaka Mori, Ikuo Okada, Sachio Shimohata
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Publication number: 20150217366Abstract: Provided is a precision casting mold including a core and an outer mold, and the outer mold is made up of: a prime layer which is formed from a slurry film obtained by drying slurry for the precision casting mold including a silica sol having a particle size of 20 nm; and a multi-layered backup layer which is formed on the outside of the prime layer by repeatedly forming a first backup layer obtained by forming and drying a slurry layer formed from the slurry for the precision casting mold and a stucco layer in which stucco particles as a stucco material having particle size distribution, in which a mixing ratio of the fine particles having a particle size of 50 to 500 ?m is 1; the mixing ratio of the medium particles having a particle size of 0.5 to 2 mm is 1 to 16; and the mixing ratio of the coarse particles having a particle size of 2 to 4 mm is 1 to 40, is adhered to the slurry layer.Type: ApplicationFiled: October 7, 2013Publication date: August 6, 2015Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Hidetaka Oguma, Kazutaka Mori, Ikuo Okada, Sachio Shimohata