Patents Assigned to Mitsubishi Aluminum Co., Ltd.
  • Patent number: 11052443
    Abstract: An apparatus for producing an inner spiral grooved tube, the apparatus includes first and second bobbins, one of which is an unwinding bobbin and the other of which is a winding bobbin; a floating frame that supports a shaft of the first bobbin; a rotary shaft that supports the floating frame though bearings and rotates in a direction perpendicular to an axis of a bobbin in the floating frame; a revolving flyer configured to invert a tube route of a tubular material between the first bobbin and the second bobbin, to convey the tubular material, and to revolve the tubular material around the floating frame as being supported by the rotary shaft; and first and second drawing dies positioned on a front stage and a rear stage of the revolving flyer, respectively, in the tube route of the tubular material
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: July 6, 2021
    Assignee: Mitsubishi Aluminum Co., Ltd.
    Inventors: Yusuke Nakaura, Yuki Hateruma
  • Patent number: 11045911
    Abstract: A sacrificial material on one surface of a core material, a Al brazing material containing Si: 6.0% to 14.0%, Mg: 0.05% to 1.5%, Bi: 0.05% to 0.25%, Sr: 0.0001% to 0.1%, and Al balance and satisfying (Bi+Mg)×Sr?0.1 is disposed on the other surface, Mg—Bi-based compounds of the brazing material with a diameter of 0.1-5.0 ?m are more than 20 per 10,000-?m2 and the Mg—Bi-based compounds with a diameter of 5.0 ?m or more are less than 2 before brazing, the core material contains Mn: 1.0% to 1.7%, Si: 0.2% to 1.0%, Fe: 0.1% to 0.5%, Cu: 0.08% to 1.0%, Mg: 0.1% to 0.7%, and Al balance, the sacrificial material contains Zn: 0.5% to 6.0% and Mg of which a content is limited to 0.1% or less, and a Mg concentration on a surface of the sacrificial material after brazing is 0.15% or less.
    Type: Grant
    Filed: July 1, 2020
    Date of Patent: June 29, 2021
    Assignees: Mitsubishi Aluminum Co., Ltd., DENSO CORPORATION
    Inventors: Yoshiki Mori, Hideyuki Miyake, Michihide Yoshino, Shohei Iwao, Masakazu Edo, Naoki Sugimoto, Nobuhiro Honma, Shogo Yamada, Hayaki Teramoto, Taketoshi Toyama
  • Patent number: 11027373
    Abstract: An aluminum alloy clad material includes: a sacrificial material on one surface of a core material; and an Al—Si—Mg—Bi-based brazing material disposed on other surface of the core material, contains, by mass %, Si: 6.0% to 14.0%, Mg: 0.05% to 1.5%, Bi: 0.05% to 0.25%, Sr: 0.0001% to 0.1%, and a balance consisting of Al and inevitable impurities, and satisfies a relationship of (Bi+Mg)×Sr?0.1 by mass %, in which Mg—Bi-based compounds contained in the Al—Si—Mg—Bi-based brazing material with a diameter of 0.1 ?m or more and less than 5.0 ?m are more than 20 in number per 10,000-?m2 and the Mg—Bi-based compounds with a diameter of 5.0 ?m or more are less than 2 in number, and the core material contains Mn: 0.9% to 1.7%, Si: 0.2% to 1.0%, Fe: 0.1% to 0.5%, Cu: 0.08% to 1.0%, and a balance consisting of Al and inevitable impurities.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: June 8, 2021
    Assignees: Mitsubishi Aluminum Co., Ltd., DENSO CORPORATION
    Inventors: Yoshiki Mori, Hideyuki Miyake, Michihide Yoshino, Shohei Iwao, Masakazu Edo, Naoki Sugimoto, Nobuhiro Honma, Shogo Yamada, Hayaki Teramoto, Taketoshi Toyama
  • Patent number: 11020824
    Abstract: An Al—Si—Mg—Bi-based brazing material containing Si: 6.0% to 14.0%, Fe: 0.05% to 0.3%, Mg: 0.02% to 1.5%, Bi: 0.05% to 0.25%, Sr: 0.0001% to 0.1%, and a balance of Al and inevitable impurities, and satisfies (Bi+Mg)×Sr?0.1, is disposed on both surfaces of a core material, Mg—Bi-based compounds of the brazing material with a diameter of 0.1 ?m or more and less than 5.0 ?m in terms of equivalent circle diameter are more than 20 in number in 10,000 ?m2 and the Mg—Bi-based compounds with diameter of 5.0 ?m or more are less than 2 in number in 10,000 ?m2, the core material contains Mn: 0.8% to 1.8%, Si: 0.01% to 1.0%, Fe: 0.1% to 0.5%, and a balance of Al and inevitable impurities, and a cathode current density of a brazing material layer after a brazing heat treatment is 0.1 mA/cm2 or less.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: June 1, 2021
    Assignees: Mitsubishi Aluminum Co., Ltd., DENSO CORPORATION
    Inventors: Yoshiki Mori, Hideyuki Miyake, Michihide Yoshino, Shohei Iwao, Masakazu Edo, Naoki Sugimoto, Nobuhiro Honma, Shogo Yamada, Hayaki Teramoto, Taketoshi Toyama
  • Publication number: 20210138522
    Abstract: A method in accordance with the present application includes sending a raw tube from a drum to an unwinding side capstan while the raw tube is rotated around a central axis perpendicular to a winding shaft of the drum by rotating the drum and the unwinding side capstan about the central axis concurrently with unwinding of the raw tube from the drum holding the raw tube, on an inner surface of which multiple straight grooves along a longitudinal direction of the raw tube are formed with an interval in a circumferential direction, in a coil shape, to wind the raw tube around the unwinding side capstan, and drawing in which the unwound raw tube is drawn while the diameter of the raw tube is reduced, and then the raw tube is wound around the drawing side capstan to twist the raw tube and obtain an inner spiral grooved tube.
    Type: Application
    Filed: January 21, 2021
    Publication date: May 13, 2021
    Applicant: Mitsubishi Aluminum Co., Ltd.
    Inventors: Yusuke NAKAURA, Takeshi SAKAGAMI, Yuki HATERUMA
  • Patent number: 11002498
    Abstract: An aluminum alloy fin material for a heat exchanger in the present invention comprises an aluminum alloy having a composition containing Mn: 1.2 to 2.0%, Cu: 0.05 to 0.20%, Si: 0.5 to 1.30%, Fe: 0.05 to 0.5%, and Zn: 1.0 to 3.0% by mass and a remainder comprising Al and an unavoidable impurity, further containing one or two or more of Ti: 0.01 to 0.20%, Cr: 0.01 to 0.20% and Mg: 0.01 to 0.20% by mass as desired, and, after heating in brazing, has a tensile strength of 140 MPa or more, a proof stress of 50 MPa or more, an electrical conductivity of 42% IACS or more, an average grain diameter of 150 ?m or more and less than 700 ?m, and a potential of ?800 mV or more and ?720 mV or less.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: May 11, 2021
    Assignees: MITSUBISHI ALUMINUM CO., LTD., DENSO CORPORATION
    Inventors: Shigeki Nakanishi, Shohei Iwao, Masakazu Edo, Hayaki Teramoto, Manabu Hasegawa, Michiyasu Yamamoto, Shoei Teshima
  • Patent number: 10933456
    Abstract: A method in accordance with the present application includes sending a raw tube from a drum to an unwinding side capstan while the raw tube is rotated around a central axis perpendicular to a winding shaft of the drum by rotating the drum and the unwinding side capstan about the central axis concurrently with unwinding of the raw tube from the drum holding the raw tube, on an inner surface of which multiple straight grooves along a longitudinal direction of the raw tube are formed with an interval in a circumferential direction, in a coil shape, to wind the raw tube around the unwinding side capstan, and drawing in which the unwound raw tube is drawn while the diameter of the raw tube is reduced, and then the raw tube is wound around the drawing side capstan to twist the raw tube and obtain an inner spiral grooved tube.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: March 2, 2021
    Assignee: Mitsubishi Aluminum Co., Ltd.
    Inventors: Yusuke Nakaura, Takeshi Sakagami, Yuki Hateruma
  • Publication number: 20210040586
    Abstract: Provided is an aluminum alloy fin stock for a heat exchanger which is free from brazing defects due to fin deformation during brazing and is excellent in strength, electric conductivity, corrosion resistance, and brazability, and a heat exchanger. An aluminum alloy fin stock for a heat exchanger is made of an aluminum alloy having a composition including, by mass %, Mn: 1.2% to 2.0%, Si: 0.5% to 1.3%, Cu: 0.001% to less than 0.05%, Fe: 0.1% to 0.5%, Zn: 0.5% to 2.5%, and a balance consisting of Al and inevitable impurities, in which, at a room temperature after brazing heating, the aluminum alloy fin stock has a tensile strength of 140 MPa or more, a 0.2% proof stress of 50 MPa or more, a electric conductivity of 42% IACS or more, an electric potential of ?800 mV or more and ?710 mV or less, and a corrosion weight loss of 120 mg/dm2 or less after 16 weeks in a neutral salt spray test.
    Type: Application
    Filed: December 20, 2018
    Publication date: February 11, 2021
    Applicants: Mitsubishi Aluminum Co., Ltd., DENSO CORPORATION
    Inventors: Shigeki NAKANISHI, Yusuke IMAI, Shohei IWAO, Atsushi SAJI, Takahiro SHINODA, Masanobu llO
  • Patent number: 10898963
    Abstract: Brazing sheet for flux-free brazing, wherein an outermost surface brazing filler metal layer, consisting of an Al—Si-based alloy containing 4 to 12% Si in mass %, and an intermediate brazing filler metal layer, consisting of an Al—Si—Mg-based alloy containing 1% or more and less than 4% Si and 0.1 to 5.0% Mg in mass %, are cladded on one side or both sides of a core material, and wherein aluminum members are joined to each other without using flux in a non-oxidizing gas atmosphere under normal pressure with an oxygen concentration of 300 ppm or less, using the brazing sheets.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: January 26, 2021
    Assignee: MITSUBISHI ALUMINUM CO., LTD.
    Inventor: Hideyuki Miyake
  • Publication number: 20210001436
    Abstract: An aluminum alloy clad material having four layers includes: a sacrificial material on one surface of a core material; and an Al—Si—Mg—Bi-based brazing material which clads the other surface thereof on one surface of the sacrificial material on an opposite side to the core material, the brazing material containing Si: 6.0% to 14.0%, Mg: 0.05% to 1.5%, Bi: 0.05% to 0.25%, Sr: 0.0001% to 0.1%, and Al balance, and satisfying (Bi+Mg)×Sr?0.1, Mg—Bi-based compounds contained in the brazing material with a diameter of 0.1-5.0 ?m are more than 20 in number per 10,000-?m2 and the Mg—Bi-based compounds with a diameter of 5.0 ?m or more are less than 2 before brazing, and the core material contains Mn: 1.0% to 1.7%, Si: 0.2% to 1.0%, Fe: 0.1% to 0.5%, Cu: 0.1% to 0.7%, and a balance consisting of Al and inevitable impurities.
    Type: Application
    Filed: June 30, 2020
    Publication date: January 7, 2021
    Applicants: Mitsubishi Aluminum Co., Ltd., DENSO CORPORATION
    Inventors: Yoshiki MORI, Hideyuki MIYAKE, Michihide YOSHINO, Shohei IWAO, Masakazu EDO, Naoki SUGIMOTO, Nobuhiro HONMA, Shogo YAMADA, Hayaki TERAMOTO, Taketoshi TOYAMA
  • Publication number: 20210001434
    Abstract: An aluminum alloy clad material includes: a sacrificial material on one surface of a core material; and an Al—Si—Mg—Bi-based brazing material disposed on other surface of the core material, contains, by mass %, Si: 6.0% to 14.0%, Mg: 0.05% to 1.5%, Bi: 0.05% to 0.25%, Sr: 0.0001% to 0.1%, and a balance consisting of Al and inevitable impurities, and satisfies a relationship of (Bi+Mg)×Sr?0.1 by mass %, in which Mg—Bi-based compounds contained in the Al—Si—Mg—Bi-based brazing material with a diameter of 0.1 ?m or more and less than 5.0 ?m are more than 20 in number per 10,000-?m2 and the Mg—Bi-based compounds with a diameter of 5.0 ?m or more are less than 2 in number, and the core material contains Mn: 0.9% to 1.7%, Si: 0.2% to 1.0%, Fe: 0.1% to 0.5%, Cu: 0.08% to 1.0%, and a balance consisting of Al and inevitable impurities.
    Type: Application
    Filed: June 30, 2020
    Publication date: January 7, 2021
    Applicants: Mitsubishi Aluminum Co., Ltd., DENSO CORPORATION
    Inventors: Yoshiki MORI, Hideyuki MIYAKE, Michihide YOSHINO, Shohei IWAO, Masakazu EDO, Naoki SUGIMOTO, Nobuhiro HONMA, Shogo YAMADA, Hayaki TERAMOTO, Taketoshi TOYAMA
  • Publication number: 20210001437
    Abstract: A sacrificial material on one surface of a core material, a Al brazing material containing Si: 6.0% to 14.0%, Mg: 0.05% to 1.5%, Bi: 0.05% to 0.25%, Sr: 0.0001% to 0.1%, and Al balance and satisfying (Bi+Mg)×Sr?0.1 is disposed on the other surface, Mg-Bi-based compounds of the brazing material with a diameter of 0.1-5.0 ?m are more than 20 per 10,000-?m2 and the Mg-Bi-based compounds with a diameter of 5.0 ?m or more are less than 2 before brazing, the core material contains Mn: 1.0% to 1.7%, Si: 0.2% to 1.0%, Fe: 0.1% to 0.5%, Cu: 0.08% to 1.0%, Mg: 0.1% to 0.7%, and Al balance, the sacrificial material contains Zn: 0.5% to 6.0% and Mg of which a content is limited to 0.1% or less, and a Mg concentration on a surface of the sacrificial material after brazing is 0.15% or less.
    Type: Application
    Filed: July 1, 2020
    Publication date: January 7, 2021
    Applicants: Mitsubishi Aluminum Co., Ltd., DENSO CORPORATION
    Inventors: Yoshiki MORI, Hideyuki MIYAKE, Michihide YOSHINO, Shohei IWAO, Masakazu EDO, Naoki SUGIMOTO, Nobuhiro HONMA, Shogo YAMADA, Hayaki TERAMOTO, Taketoshi TOYAMA
  • Publication number: 20210001435
    Abstract: An Al—Si—Mg—Bi-based brazing material containing Si: 6.0% to 14.0%, Fe: 0.05% to 0.3%, Mg: 0.02% to 1.5%, Bi: 0.05% to 0.25%, Sr: 0.0001% to 0.1%, and a balance of Al and inevitable impurities, and satisfies (Bi+Mg)×Sr?0.1, is disposed on both surfaces of a core material, Mg—Bi-based compounds of the brazing material with a diameter of 0.1 ?m or more and less than 5.0 ?m in terms of equivalent circle diameter are more than 20 in number in 10,000 ?m2 and the Mg—Bi-based compounds with diameter of 5.0 ?m or more are less than 2 in number in 10,000 ?m2, the core material contains Mn: 0.8% to 1.8%, Si: 0.01% to 1.0%, Fe: 0.1% to 0.5%, and a balance of Al and inevitable impurities, and a cathode current density of a brazing material layer after a brazing heat treatment is 0.1 mA/cm2 or less.
    Type: Application
    Filed: June 30, 2020
    Publication date: January 7, 2021
    Applicants: Mitsubishi Aluminum Co., Ltd., DENSO CORPORATION
    Inventors: Yoshiki MORI, Hideyuki MIYAKE, Michihide YOSHINO, Shohei IWAO, Masakazu EDO, Naoki SUGIMOTO, Nobuhiro HONMA, Shogo YAMADA, Hayaki Teramoto, Taketoshi Toyama
  • Publication number: 20200216933
    Abstract: An aluminum alloy foil has a composition containing 1.0% by mass or more and 1.8% by mass or less of Fe, more than 0.10% by mass and 0.20% by mass or less of Si, 0.005% by mass or more and 0.05% by mass or less of Cu, and Mn regulated to be 0.01% by mass or less, with the balance consisting of Al and incidental impurities, wherein, with regard to crystal grains surrounded by high inclination angle grain boundaries which are grain boundaries having a misorientation of 15° or more in analysis of crystal orientation per unit area using electron backscatter diffraction, an average grain size of the crystal grains is 10 ?m or less, and a maximum grain size of the crystal grains/the average grain size of the crystal grains?3.0, and when a thickness of the foil is 30 ?m, elongations in directions making 0°, 45° and 90° with respect to a rolling direction are each 25% or more respectively.
    Type: Application
    Filed: September 6, 2017
    Publication date: July 9, 2020
    Applicant: MITSUBISHI ALUMINUM CO., LTD.
    Inventor: Takashi SUZUKI
  • Publication number: 20200123639
    Abstract: An aluminum alloy foil has a composition containing 1.0% to 1.8% by mass of Fe, 0.01% to 0.10% by mass of Si, 0.005% to 0.05% by mass of Cu, and Mn regulated to be 0.01% by mass or less, with the balance consisting of Al and incidental impurities. With regard to crystal grains surrounded by high inclination angle grain boundaries which are grain boundaries having a misorientation of 15° or more in analysis of crystal orientation per unit area using electron backscatter diffraction, an average grain size of the crystal grains is 5 ?m or less, and a maximum grain size of the crystal grains/the average grain size of the crystal grains ?3.0. When a thickness of the foil is 30 ?m, elongations in directions making 0°, 45° and 90° with respect to a rolling direction are 25% or more respectively.
    Type: Application
    Filed: September 6, 2017
    Publication date: April 23, 2020
    Applicant: MITSUBISHI ALUMINUM CO., LTD.
    Inventor: Takashi SUZUKI
  • Publication number: 20200115778
    Abstract: An aluminum alloy fin material and a heat exchanger having excellent moldability, strength, resistance to brazing erosion and durability are provided. The aluminum alloy fin material has a composition comprising, in % by mass, Zr: 0.05 to 0.3%, Mn: 1.8 to 2.5%, Si: 0.7 to 1.3%, Fe: 0.05 to 0.5%, Cu: 0.25 to 0.7%, Zn: 2.0 to 5.0%, with the balance being Al and inevitable impurities, wherein a ratio of Mn/Si in terms of content is in a range of 1.5 to 2.9, and the aluminum alloy fin material has a tensile strength before brazing of 210 to 280 MPa, a tensile strength after brazing of 175 MPa or more, an electrical conductivity after brazing of 37% IACS or more, and a solidus temperature of 605° C. or more, and has a crystal grain structure before brazing of a non-recrystallized grain structure, and has an average crystal grain size in a rolled surface after brazing of 300 ?m to 2,000 ?m.
    Type: Application
    Filed: October 15, 2019
    Publication date: April 16, 2020
    Applicants: MITSUBISHI ALUMINUM CO., LTD., DENSO CORPORATION
    Inventors: Michihide YOSHINO, Shohei IWAO, Tetsuya YAMAMOTO, Takahiro SHINODA, Koichi NAKASHITA
  • Publication number: 20200115779
    Abstract: An aluminum alloy fin material and a heat exchanger having excellent moldability, strength, resistance to brazing erosion and durability are provided. The aluminum alloy fin material has a composition comprising Mn: 1.8 to 2.5%, Si: 0.7 to 1.3%, Fe: 0.05 to 0.3%, Cu: 0.14 to 0.30%, Zn: 1.3 to 3.0%, with the balance being Al and inevitable impurities, wherein a ratio Mn/Si in terms of content is in a range of 1.5 to 2.9, and the aluminum alloy fin material has a solidus temperature of 610° C. or more, a tensile strength before brazing of 220 to 270 MPa, has a crystal grain structure before brazing of a non-recrystallized grain structure, and has a tensile strength after brazing of 160 MPa or more, an electrical conductivity after brazing of 40% IACS or more and an average crystal grain size in a rolled surface after brazing of 300 ?m to 2,000 ?m.
    Type: Application
    Filed: October 15, 2019
    Publication date: April 16, 2020
    Applicants: MITSUBISHI ALUMINUM CO., LTD., DENSO CORPORATION
    Inventors: Michihide YOSHINO, Shohei IWAO, Tetsuya YAMAMOTO, Takahiro SHINODA, Koichi NAKASHITA
  • Publication number: 20200086428
    Abstract: A brazing sheet for flux-free brazing has an outermost surface brazing filler metal layer, consisting of an Al—Si-based alloy containing 2 to 13% Si in mass %, and an intermediate brazing filler metal layer, consisting of an Al—Si—Mg-based alloy containing 4 to 13% Si and 0.1 to 5.0% Mg in mass %, which are cladded on one or both sides of a core material. In the outermost surface brazing filler metal layer, the number of Si particles having a circle equivalent diameter of 1.75 ?m or more is 10% or more of the number having a circle equivalent diameter of 0.8 ?m or more, as observed in the direction of the surface layer. The intermediate brazing filler metal layer contains less than 3000 per 10000 ?m2 of Si particles having a circle equivalent diameter of 0.25 ?m or more, as observed in a cross section of the brazing filler metal layer.
    Type: Application
    Filed: October 12, 2017
    Publication date: March 19, 2020
    Applicant: MITSUBISHI ALUMINUM CO., LTD.
    Inventor: Hideyuki MIYAKE
  • Publication number: 20200047290
    Abstract: In a mixed composition coating material for brazing, when a total mass of a solid material, an organic solvent, and water is defined as 100 mass %, the solid material are contained in an amount of 30 mass % or greater and 80 mass % or less with respect to the whole coating material, the organic solvent and the water is contained in a total amount of 20 mass % or greater and 70 mass % or less with respect to the whole coating material, and the water is contained in an amount of 0.4 mass % or greater and 2.5 mass % or less with respect to the whole coating material.
    Type: Application
    Filed: January 22, 2018
    Publication date: February 13, 2020
    Applicant: Mitsubishi Aluminum Co., Ltd.
    Inventors: Masaya KATSUMATA, Yasunori HYOGO
  • Patent number: 10544993
    Abstract: A cooling device including: a base block having a first length and a first thickness and having a mounting side on which a heat-generating body is installed along a first vertical direction. The cooling device further includes a pipe unit, including a tank buried at an opposite side to the mounting side of the base block for storing a coolant, and pipes which are connected to the tank and are parallel to one another. Heat radiation fins are disposed on the pipes in a state in which the pipes penetrate the heat radiation fins. The cooling device in which the tank is formed has a flattened shape and a smaller dimension along a first thickness direction of the base block than a height dimension along the first length of the block. Each of the pipes are connected to an upper position of the tank with respect to the height dimension.
    Type: Grant
    Filed: December 25, 2015
    Date of Patent: January 28, 2020
    Assignee: MITSUBISHI ALUMINUM CO., LTD.
    Inventors: Hiroshi Takemura, Yasuhito Sueki, Shun-ichi Sata, Tokio Hisano