Patents Assigned to The Japan Steel Works, Ltd.
  • CONTINUOUS EXTRUSION DEVICE BASED ON TWIN SCREW EXTRUDER
    Publication number: 20150314513
    Abstract: The present invention performs, by using a pair of filters, continuous operation of a twin screw extruder even during replacement of a filter. The continuous extrusion device based on a twin screw extruder of the present invention has a pair of filters (6, 6a) provided in a degassing device (5), and a partition valve (24) having a valve (34) for setting the filters (6, 6a) and a screw hole (16) of a cylinder (1) to a communicating or non-communicating state, degassing being performed by using the second filter (6a) during replacement of the first filter (6), and the twin screw extruder being operated continuously even during replacement of the filters (6, 6a).
    Type: Application
    Filed: March 19, 2014
    Publication date: November 5, 2015
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Seiji TAKAMOTO, Makoto ISHIKAWA, Jun KAKIZAKI, Reo FUJITA, Kyohei YATA
  • VENT ASSEMBLY DEVICE FOR TWIN-SCREW EXTRUDER
    Publication number: 20150314512
    Abstract: The vent assembly device for a twin-screw extruder according to the present invention includes a vent assembly (7) that has a vent opening (6) and that is provided in a cylinder (1) of a twin-screw extruder (11) having a left axis-side screw (2) and a right axis-side screw (3). The size of at least the vent opening (6) of the vent assembly (7) can be freely modified by forming the vent assembly (7) from a plurality of vent assembly units (7a) and by providing the plurality of vent assembly units (7a) for one vent opening (6).
    Type: Application
    Filed: February 13, 2014
    Publication date: November 5, 2015
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Makoto TOJO, Yoshihiko IWAMOTO, Jun KAKIZAKI
  • Lightning protection structure of blade for wind power generation
    Patent number: 9169826
    Abstract: To effectively perform lightning protection in a blade for wind power generation and to prevent the blade from being damaged when arresting lightning. The lightning protection structure of the blade for wind power generation includes a conductive lightning receptor 1 attached to a part of the blade for wind power generation, and a ceramic member 10 interposed between at least surface-layer portions of the lightning receptor 1 and the blade 5. Therefore, an electric field is likely to concentrate at an interface between the ceramic member 10 having excellent heat resistance and the lightning receptor 1, so that it is possible to effectively prevent the blade 5 from being damaged due to a concentration of the electric field at the interface of the blade 5 attached with the lightning receptor 1 when arresting the lightning.
    Type: Grant
    Filed: February 3, 2011
    Date of Patent: October 27, 2015
    Assignee: THE JAPAN STEEL WORKS LTD.
    Inventor: Atsutoshi Muto
  • Apparatus including a fixed temporary stage for manufacturing molded product
    Patent number: 9168561
    Abstract: An apparatus for manufacturing a molded product, which has a highly homogeneous thin film, at low cost by operating an injection molding machine and a film forming device at a high rate of operation is provided. A molded product formed by an injection molding machine is conveyed to a temporary stage by a first conveying device. The molded products corresponding to several times of an injection molding step are pooled on the temporary stage by the repetition of an injection molding step. A second conveying device collectively conveys all the molded products, which are pooled on the temporary stage, to a film forming device. Films are formed on the molded products by the film forming device, and the molded products are conveyed to the outside by a third conveying device. The injection molding step is continuously performed while a film forming step is performed.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: October 27, 2015
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventor: Shoso Nishida
  • Method of determining fatigue crack lifetime in high-pressure hydrogen environment
    Patent number: 9151706
    Abstract: In a method of determining a fatigue crack lifetime of a low-alloy steel material coming in contact with high-pressure hydrogen in a high-pressure hydrogen environment, estimate a fatigue crack acceleration starting point KmaxT of the low-alloy steel material using a crack-growth threshold stress intensity factor KIH-R obtained through a rising load test on the low-alloy steel material in a high-pressure hydrogen environment. The high-pressure hydrogen environment of the rising load test is a high-pressure hydrogen environment which has the same pressure and atmosphere as in the high-pressure hydrogen environment in which KmaxT is estimated and in which the test temperature tolerance between both environments is ±5° C.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: October 6, 2015
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventor: Yoru Wada
  • Lightning protection structure of blade for wind power generation
    Patent number: 9136685
    Abstract: A blade for wind power generation includes a lightning receptor configured to form a part of the surface of the blade, and a lightning receiving protrusion that protrudes outward from the surface of the lightning receptor. The lightning receiving protrusion is provided to a surface boundary between the blade and the lightning receptor. The surface boundary configured to protect against the lightning is positioned within a radius of a circle, which is centered on a tip of the lightning receiving protrusion and which has a radius of twice the length of the lightning receiving protrusion. A point where electric field concentration on the surface of the lightning receptor is greatest is moved from the boundary to the tip of the lightning receiving protrusion, so as to significantly reduce a possibility of blade damage associated with lightning striking the boundary when being stroke by the lightning.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: September 15, 2015
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Jun Suzuki, Atsutoshi Muto
  • Mold molding method and mold molding member
    Patent number: 9132475
    Abstract: An object is to provide a mold molding method which can provide a high general-purpose property and can reduce a usage quantity of molding sand. In a method for molding a mold (sand mold) by self-hardening molding sand using a caking additive, the mold is molded by disposing hollow spheres each formed to have no clearance therein among molding sand mixed with the caking additive. Preferably, the hollow sphere may be formed by working two metal plates to semispherical shapes and then connecting the semispherical-shaped metal plates to each other by welding their respective whole peripheries. A specific gravity of the hollow sphere may be 0.5 to 2.0 times a specific gravity of the molding sand.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: September 15, 2015
    Assignees: THE JAPAN STEEL WORKS, LTD., NIKKO MEC CO., LTD.
    Inventors: Daisuke Tomigashi, Yoshikazu Itabashi, Seiji Kubo
  • Pressure vessel for growing single crystals
    Patent number: 9127372
    Abstract: An object of the present invention is to manufacture single crystals of high quality on an industrial production scale by preventing impurities from being mixed in single crystals when the single crystals are produced by the solvothermal method. A pressure vessel body 1, in which a supercritical state is maintained, is made of heat resistant alloy, a portion of the pressure vessel body is open, a corrosion-resistant mechanical lining 5 is provided on an inner face of the pressure vessel and on an entire outer circumferential edge of the opening, and the opening is sealed by an airtight mating face formed out of a corrosion-resistant mechanical lining, which is formed on the outer circumferential edge of the opening, and by an airtight mating face of the corrosion-resistant mechanical lining cover 6 on an inner face of the cover 3 through a corrosion-resistant gasket member.
    Type: Grant
    Filed: January 11, 2006
    Date of Patent: September 8, 2015
    Assignees: THE JAPAN STEEL WORKS, LTD., MITSUBISHI CHEMICAL CORPORATION, FURUYA METAL CO., LTD.
    Inventors: Yuji Sasagawa, Osamu Wakao, Yoshihiko Yamamura, Shigeharu Akatsuka, Keiichiro Matsushita
  • Method of deposition
    Patent number: 9109282
    Abstract: A method of deposition is provided in which a deposition operation can be immediately performed when a workpiece for deposition is carried into a deposition chamber irrespective of a shape or a structure of the workpiece for deposition. The workpiece for deposition is integrally molded with an assisting member, which is configured to maintain the workpiece for deposition in a predetermined orientation such that a deposition surface or a deposition portion thereof faces a target material when the workpiece for deposition is carried into a deposition chamber and is placed on a deposition stand, when the workpiece for deposition is injection-molded; and the workpiece for deposition is carried into the deposition chamber and is deposited.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: August 18, 2015
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventor: Shoso Nishida
  • NI-BASED ALLOY HAVING EXCELLENT HYDROGEN EMBRITTLEMENT RESISTANCE, AND METHOD FOR PRODUCING NI-BASED ALLOY MATERIAL
    Publication number: 20150225827
    Abstract: An object is to provide a Ni-based alloy having high strength and excellent hydrogen embrittlement resistance even in a high-temperature and high-pressure environment and particularly capable of being used for an ammonothermal pressure vessel and the like. The present invention relates to a Ni-based alloy including, in terms of mass ratios, Fe: 30 to 40%, Cr: 14 to 16%, Ti: 1.2 to 1.7%, Al: 1.1 to 1.5%, Nb: 1.9 to 2.7%, and P: 40 to 150 ppm, with the remainder being Ni and unavoidable impurities.
    Type: Application
    Filed: August 22, 2013
    Publication date: August 13, 2015
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Kouichi Takasawa, Eiji Maeda, Shinya Sato, Takashi Hatano, Tatsuya Takahashi
  • Method of producing superconductive oxide material
    Patent number: 9096440
    Abstract: A method of producing a superconductive material involves the step (1) of applying a solution of an organic compound of metals and oxides of the metals forming a superconductive material, onto a support body to be subsequently dried, the provisional baking step (2) of causing organic components of the organic compound of the metals to undergo thermal decomposition, and the main baking process step (3) of causing transformation of the oxides of the metals into the superconductive material, thereby producing an epitaxially-grown superconductive coating material, wherein the support body is irradiated with the laser light during a period between the steps (1) and (2) from a surface of the support body, on the opposite side of the surface coated with the solution of the organic compound of the metals for forming the superconductive material.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: August 4, 2015
    Assignees: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, THE JAPAN STEEL WORKS, LTD.
    Inventors: Mitsugu Sohma, Tetsuo Tsuchiya, Toshiya Kumagai, Kenichi Tsukada, Kunihiko Koyanagi, Takashi Ebisawa, Hidehiko Ohtu
  • COATING STRUCTURE MATERIAL
    Publication number: 20150197071
    Abstract: The invention is to provide a coating structure material excellent in Mg corrosion resistance, which has resistance to corrosion caused by molten Mg and molten Mg alloys. The invention relates to a coating structure material including an Ni—Co-base alloy substrate and a Co-base alloy coating layer formed on the Ni—Co-base alloy substrate, wherein the Co-base alloy coating layer contains, in terms of % by mass, Ni: 20% or less, Co: 42% or more, Si: 2.8% or less, and Fe: 3.5% or less.
    Type: Application
    Filed: September 24, 2013
    Publication date: July 16, 2015
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Kouichi Takasawa, Eiji Maeda, Shinji Tanaka, Tatsuya Takahashi
  • METHOD OF MANUFACTURING A PRESSURE VESSEL FOR GROWING SINGLE CRYSTALS
    Publication number: 20150182928
    Abstract: An object of the present invention is to manufacture single crystals of high quality on an industrial production scale by preventing impurities from being mixed in single crystals when the single crystals are produced by the solvothermal method. A pressure vessel body 1, in which a supercritical state is maintained, is made of heat resistant alloy, a portion of the pressure vessel body is open, a corrosion-resistant mechanical lining 5 is provided on an inner face of the pressure vessel and on an entire outer circumferential edge of the opening, and the opening is sealed by an airtight mating face formed out of a corrosion-resistant mechanical lining, which is formed on the outer circumferential edge of the opening, and by an airtight mating face of the corrosion-resistant mechanical lining cover 6 on an inner face of the cover 3 through a corrosion-resistant gasket member.
    Type: Application
    Filed: March 13, 2015
    Publication date: July 2, 2015
    Applicants: FURUYA METAL CO., LTD., THE JAPAN STEEL WORKS, LTD., MITSUBISHI CHEMICAL CORPORATION
    Inventors: Yuji SASAGAWA, Osamu WAKAO, Yoshihiko YAMAMURA, Shigeharu AKATSUKA, Keiichiro MATSUSHITA
  • Screw shaft structure for double-shaft extruder
    Patent number: 9057264
    Abstract: A screw shaft structure for a twin screw extruder includes a tapered section (20) provided between a ground section (6) and a screw piece inserting section (8), and a tapered ring (21) fitted onto the tapered section (20). The tapered ring (21) serves as a flange section. An object is to reduce the weight of raw material to be used for manufacturing a screw shaft by combining a tapered section and a tapered ring as a structure of a flange section.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: June 16, 2015
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Takuya Hamada, Satoru Watada
  • DEVICE FOR PRODUCING NANOCARBON
    Publication number: 20150158001
    Abstract: Using a device for producing nanocarbon, a fluidized bed is formed by supplying a low hydrocarbon and oxygen to a fluid catalyst, and nanocarbon and hydrogen are produced by a decomposition reaction of the low hydrocarbon accompanied by a self-combustion of the low hydrocarbon and the oxygen. The device includes: a fluidized bed reactor for containing the fluid catalyst and for causing the self-combustion thereof while being supplied with the low hydrocarbon and the oxygen; a gas supplying unit connected to the fluidized bed reactor for supplying the low hydrocarbon and the oxygen to the fluidized bed reactor; an exhaust gas path connected to the fluidized bed reactor for exhausting an exhaust gas in the fluidized bed reactor to outside; and a supplying unit connected to the fluidized bed reactor for supplying the fluid catalyst to the fluidized bed reactor.
    Type: Application
    Filed: February 11, 2015
    Publication date: June 11, 2015
    Applicants: THE JAPAN STEEL WORKS, LTD., National University Corporation Kitami Institute of Technology
    Inventors: Satoru NAKAMURA, Akio Tada
  • HIGH-STRENGTH LOW-ALLOY STEEL EXCELLENT IN HIGH-PRESSURE HYDROGEN ENVIRONMENT EMBRITTLEMENT RESISTANCE CHARACTERISTICS AND METHOD FOR PRODUCING THE SAME
    Publication number: 20150152532
    Abstract: An object of the present invention is to provide at a low cost a low-alloy steel having a high strength and excellent high-pressure hydrogen environment embrittlement resistance characteristics under a high-pressure hydrogen environment. The invention is a high-strength low-alloy steel having high-pressure hydrogen environment embrittlement resistance characteristics, which has a composition comprising C: 0.10 to 0.20% by mass, Si: 0.10 to 0.40% by mass, Mn: 0.50 to 1.20% by mass, Ni: 0.75 to 1.75% by mass, Cr: 0.20 to 0.80% by mass, Cu: 0.10 to 0.50% by mass, Mo: 0.10 to 1.00% by mass, V: 0.01 to 0.10% by mass, B: 0.0005 to 0.005% by mass and N: 0.01% by mass or less, and further comprising one or two of Nb: 0.01 to 0.10% by mass and Ti: 0.005 to 0.050% by mass, with the balance consisting of Fe and unavoidable impurities.
    Type: Application
    Filed: February 6, 2015
    Publication date: June 4, 2015
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Kouichi TAKASAWA, Yoru WADA, Ryoji ISHIGAKI, Yasuhiko TANAKA
  • Low alloy steel for geothermal power generation turbine rotor, and low alloy material for geothermal power generation turbine rotor and method for manufacturing the same
    Patent number: 9034121
    Abstract: A low alloy steel ingot contains from 0.15 to 0.30% of C, from 0.03 to 0.2% of Si, from 0.5 to 2.0% of Mn, from 0.1 to 1.3% of Ni, from 1.5 to 3.5% of Cr, from 0.1 to 1.0% of Mo, and more than 0.15 to 0.35% of V, and optionally Ni, with a balance being Fe and unavoidable impurities. Performing quality heat treatment including a quenching step and a tempering step to the low alloy steel ingot to obtain a material, which has a grain size number of from 3 to 7 and is free from pro-eutectoid ferrite in a metallographic structure thereof, and which has a tensile strength of from 760 to 860 MPa and a fracture appearance transition temperature of not higher than 40° C.
    Type: Grant
    Filed: April 17, 2012
    Date of Patent: May 19, 2015
    Assignees: THE JAPAN STEEL WORKS,LTD., KABUSHIKI KAISHA TOSHIBA
    Inventors: Satoru Ohsaki, Kazuhiro Miki, Tsukasa Azuma, Koji Kajikawa, Shigeru Suzuki, Masayuki Yamada, Itaru Murakami, Kenichi Okuno, Liang Yan, Reki Takaku, Akihiro Taniguchi, Tetsuya Yamanaka, Makoto Takahashi, Kenichi Imai, Osamu Watanabe, Joji Kaneko
  • Forging heat resistant steel, manufacturing method thereof, forged parts and manufacturing method thereof
    Patent number: 8999078
    Abstract: A forging heat resistant steel of an embodiment contains in percent by mass C: 0.05-0.2, Si: 0.01-0.1, Mn: 0.01-0.15, Ni: 0.05-1, Cr: 8 or more and less than 10, Mo: 0.05-1, V: 0.05-0.3, Co: 1-5, W: 1-2.2, N: 0.01 or more and less than 0.015, Nb: 0.01-0.15, B: 0.003-0.03, and a remainder comprising Fe and unavoidable impurities.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: April 7, 2015
    Assignees: Kabushiki Kaisha Toshiba, The Japan Steel Works, Ltd.
    Inventors: Masayuki Yamada, Reki Takaku, Haruki Ohnishi, Kenichi Okuno, Kenichi Imai, Kazuhiro Miki, Tsukasa Azuma, Satoru Ohsaki
  • High-strength low-alloy steel excellent in high-pressure hydrogen environment embrittlement resistance characteristics and method for producing the same
    Patent number: 8974612
    Abstract: An object of the present invention is to provide at a low cost a low-alloy steel having a high strength and excellent high-pressure hydrogen environment embrittlement resistance characteristics under a high-pressure hydrogen environment. The invention is a high-strength low-alloy steel having high-pressure hydrogen environment embrittlement resistance characteristics, which has a composition comprising C: 0.10 to 0.20% by mass, Si: 0.10 to 0.40% by mass, Mn: 0.50 to 1.20% by mass, Ni: 0.75 to 1.75% by mass, Cr: 0.20 to 0.80% by mass, Cu: 0.10 to 0.50% by mass, Mo: 0.10 to 1.00% by mass, V: 0.01 to 0.10% by mass, B: 0.0005 to 0.005% by mass and N: 0.01% by mass or less, and further comprising one or two of Nb: 0.01 to 0.10% by mass and Ti: 0.005 to 0.050% by mass, with the balance consisting of Fe and unavoidable impurities.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: March 10, 2015
    Assignee: The Japan Steel Works, Ltd.
    Inventors: Kouichi Takasawa, Yoru Wada, Ryoji Ishigaki, Yasuhiko Tanaka
  • MOTOR ROTOR SUPPORT AND METHOD FOR MANUFACTURING SAME
    Publication number: 20150054360
    Abstract: An object of the present invention is to provide a motor rotor support suitable for an axial gap motor and a method for manufacturing the same. The motor rotor support for supporting a magnetic body disposed on a rotor of the motor is configured by laminating single materials each formed from a hot-worked material or a cold-worked material preferably composed of an 18Mn-18Cr nonmagnetic steel.
    Type: Application
    Filed: March 27, 2013
    Publication date: February 26, 2015
    Applicants: SANWAKOGYO LTD., THE JAPAN STEEL WORKS, LTD.
    Inventors: Shinji Tanaka, Hirokazu Madarame, Toshifumi Nakajima, Kazuhiro Miyagi