Patents Assigned to Toyo Aluminium Kabushiki Kaisha
  • Patent number: 6126711
    Abstract: A raw material for powder metallurgy contains at least 0.5 vol % and at most 10 vol % of alumina powder of which the sieve fraction with a sieve opening of 30 .mu.m is at most 0.1 wt %, and a remaining part of aluminum alloy powder. The moisture content of the alumina powder is at most 0.15 wt. % with respect to the alumina powder. Agglomeration of particles is thereby minimized or avoided. Highly reliable raw material for powder metallurgy having superior fatigue strength, impact resistance and wear resistance can be obtained. A method of preparing such a mixed powder raw material involves air classifying the powder materials, dry ball mixing the materials, and then annealing the mixed powder.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: October 3, 2000
    Assignees: Toyo Aluminium Kabushiki Kaisha, Honda Giken Kogyo Kabushiki Kaisha, Sumitomo Electric Industries, Ltd.
    Inventors: Jun Kusui, Kazuhiko Yokoe, Kazuo Fujii, Kyo Takahashi, Kosuke Doi, Hiroyuki Horimura, Hisao Hattori, Toshihiko Kaji, Yoshinobu Takeda, Koji Yamada
  • Patent number: 6074494
    Abstract: This invention aims to provide a nitriding method of forming a relatively thick nitride layer on the surface of an aluminum material containing silicon, and an auxiliary agent for nitriding. By using a nitriding auxiliary agent mainly comprising aluminum containing a metal such as lithium or boron, which has a high bonding strength with oxygen, coexists with silicon to form substantially no silicide, or a nitriding auxiliary agent mainly comprising an Al--Mg--Cu alloy or an Mg--Zn--Cu alloy, heat treatment is applied by nitrogen gas with the aluminum material to be nitrided contacted with the nitriding auxiliary agent. Hence, a thick nitride layer can be easily formed even on the surface of an aluminum material containing silicon, and this is most suitable to surface nitride aluminum-silicon alloys, which possess superior castability.
    Type: Grant
    Filed: June 2, 1997
    Date of Patent: June 13, 2000
    Assignees: Toyota Jidosha Kabushiki Kaisha, Toyo Aluminium Kabushiki Kaisha
    Inventors: Hirohisa Miura, Yasuhiro Yamada, Haruzo Katoh
  • Patent number: 6035922
    Abstract: To provide an apparatus for manufacturing a casting, in which sealing can be formed between joint surfaces of a mold without using any packing material. An apparatus for manufacturing a casting comprising a mold split into at least two mold parts designed so as to define a cavity, an introduction port provided at one end of the mold for introducing molten metal into the cavity, and an exhaust port provided at the other end of the mold for exhausting air in the cavity; characterized by further comprising a groove which is provided around a portion defining the cavity in at least one of joint surfaces of the at least two mold parts so as to connect the introduction port to the exhaust port.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: March 14, 2000
    Assignees: Sugitani Kinzoku Kogyo Kabushiki Kaisha, Toyo Aluminium Kabushiki Kaisha
    Inventors: Nobuhiro Sugitani, Shoichi Makimoto
  • Patent number: 6022911
    Abstract: Colored substrate particles which are mainly used in metallic finish of automobiles, domestic electrical articles, tools and the like, decorative finish of plastics, printing ink and the like are disclosed herein. According to the present invention, adhesive property of a color pigment to substrate particles is improved by coating the surface of the color pigment with a specific surface-treatment agent. The colored substrate particles are preferably coated with a polymer polymerized by in situ polymerization, thereby the adhesion of the color pigment to the substrate particles can be further improved.
    Type: Grant
    Filed: January 15, 1999
    Date of Patent: February 8, 2000
    Assignee: Toyo Aluminium Kabushiki Kaisha
    Inventors: Yoshiki Hashizume, Satosi Kobayashi
  • Patent number: 5944886
    Abstract: Colored aluminum pigments having a color pigment adhered closely, uniformly and firmly thereto through inorganic acid radical adsorbed on the surface of the aluminum pigment are suitable for use in paints, inks and molded resins. Color fading, poor chroma and processing complications commonly encountered with conventional aluminum pigments are avoided.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: August 31, 1999
    Assignee: Toyo Aluminium Kabushiki Kaisha
    Inventor: Yoshiki Hashizume
  • Patent number: 5912283
    Abstract: Colored substrate particles which are mainly used in metallic finish of automobiles, domestic electrical articles, tools and the like, decorative finish of plastics, printing ink and the like are disclosed herein. According to the present invention, adhesive property of a color pigment to substrate particles is improved by coating the surface of the color pigment with a specific surface-treatment agent. The colored substrate particles are preferably coated with a polymer polymerized by in situ polymerization, thereby the adhesion of the color pigment to the substrate particles can be further improved.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: June 15, 1999
    Assignee: Toyo Aluminium Kabushiki Kaisha
    Inventors: Yoshiki Hashizume, Satosi Kobayashi
  • Patent number: 5888269
    Abstract: A case nitrided aluminum product is produced by contacting an aluminum product with a nitriding agent at a part of a surface thereof at least, and by nitriding the aluminum product at the surface with an ambient gas at a temperature of a melting point of the aluminum product or less while keeping the aforementioned contact. The nitriding agent includes an aluminum powder, and the ambient gas virtually includes a nitrogen gas. The resulting nitriding layer has a depth of 5 micrometers or more, and it exhibits a case hardness of from 250 to 1,200 mHv. Thus, it is possible to form the deep and hard nitriding layer on the aluminum product with ease under the conditions where it has been said to be too difficult to nitride aluminum products. The case nitrided aluminum product can appropriately make sliding parts which require high wear resistance.
    Type: Grant
    Filed: March 17, 1997
    Date of Patent: March 30, 1999
    Assignees: Toyota Jidosha Kabushiki Kaisha, Toyo Aluminium Kabushiki Kaisha
    Inventors: Yasuhiro Yamada, Hirohisa Miura, Mamoru Okamoto, Takashi Matsufuji, Taro Tatsumi, Kazuo Fujii
  • Patent number: 5614036
    Abstract: A high heat resisting and high abrasion resisting aluminum alloy and aluminum alloy powder have superior toughness, abrasion resistance, high temperature strength, and creep resistance and are useful to form engine parts for automobiles, airplanes, etc. The high heat resisting and high abrasion resisting aluminum alloy comprises 2 to 15 wt % of Ni, 0.2 to 15 wt % of Si, 0.6 to 8.0 wt % of Fe, one or two of 0.6 to 5.0 wt % of Cu and 0.5 to 3 wt % of Mg, the total amount of Cu and Mg being equal to or less than 6 wt %, one or two of 0.3 to 3 wt % of Zr and 0.3 to 3 wt % of Mo, the total amount of Zr and Mo being equal to or less than 4 wt %, 0.05 to 10 wt % of B, and the balance of Al and unavoidable impurities, and is produced by powder metallurgy.
    Type: Grant
    Filed: January 30, 1996
    Date of Patent: March 25, 1997
    Assignees: Toyota Jidosha Kabushiki Kaisha, Toyo Aluminium Kabushiki Kaisha
    Inventors: Kunihiko Imahashi, Hirohisa Miura, Yasuhiro Yamada, Hirofumi Michioka, Jun Kusui, Akiei Tanaka
  • Patent number: 5582655
    Abstract: A case nitrided aluminum product is produced by contacting an aluminum product with a nitriding agent at a part of a surface thereof at least, and by nitriding the aluminum product at the surface with an ambient gas at a temperature of a melting point of the aluminum product or less while keeping the aforementioned contact. The nitriding agent includes an aluminum powder, and the ambient gas virtually includes a nitrogen gas. The resulting nitriding layer has a depth of 5 micrometers or more, and it exhibits a case hardness of from 250 to 1,200 mHv. Thus, it is possible to form the deep and hard nitriding layer on the aluminum product with ease under the conditions where it has been said to be too difficult to nitride aluminum products. The case nitrided aluminum product can appropriately make sliding parts which require high wear resistance.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: December 10, 1996
    Assignees: Toyota Jidosha Kabushiki Kaisha, Toyo Aluminium Kabushiki Kaisha
    Inventors: Yasuhiro Yamada, Hirohisa Miura, Mamoru Okamoto, Takashi Matsufuji, Taro Tatsumi, Kazuo Fujii
  • Patent number: 5540768
    Abstract: An aluminum pigment which comprises aluminum flakes wherein the surfaces of the flakes are coated with a film of molybdic acid in an amount of from 0.1 to 10% by weight in terms of Mo metal based on the weight of aluminum, and a phosphoric ester resulting from an esterification reaction of a multifunctional epoxy compound with a phosphoric compound is adsorbed to said film in an amount of from 0.05 to 5% by weight in terms of P element based on the weight of aluminum. The aluminum pigment is excellent in paint stability as well as color tone, adhesion and moisture resistance of paint films.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: July 30, 1996
    Assignees: Toyo Aluminium Kabushiki Kaisha, Daicel Chemical Industries, Ltd.
    Inventors: Takashi Yamamoto, Takashi Matsufuji, Takaaki Fujiwa, Terumasa Daito
  • Patent number: 5494512
    Abstract: Disclosed herein is an aluminium pigment comprising aluminium flakes, the surface of each aluminium flake being coated with a film of molybdic acid in an amount of 0.1 to 10% by weight in terms of Mo based on aluminium, which is further coated with a phosphoric film derived from a phosphoric compound selected from inorganic phosphoric acids, organic phosphoric acid esters having one phosphate group and their salts in an amount of 0.05 to 1% by weight in terms of P based on aluminium. The aluminium pigment of the present invention has good color tone and good adhesion. Further, the aluminium pigment of the present invention has good resistance to hot water.
    Type: Grant
    Filed: June 28, 1994
    Date of Patent: February 27, 1996
    Assignee: Toyo Aluminium Kabushiki Kaisha
    Inventors: Takashi Yamamoto, Masatoshi Uenishi, Haruzo Katoh, Shunichi Setoguchi
  • Patent number: 5409661
    Abstract: An aluminum alloy consists essentially of 90 to 99.5% by weight of matrix and 0.5 to 10% by weight of a dispersant dispersed within the matrix. The matrix comprises 10 to 25% by weight of Si, 5 to 20% by weight of Ni, 1 to 5% by weight of Cu and the rest of Al and impurity elements. The dispersant is at least one selected from the group consisting of 0.5 to 10% of nitride, boride, carbide and oxide. The aluminum alloy shows excellent tensile strength and wear resistance.
    Type: Grant
    Filed: May 24, 1994
    Date of Patent: April 25, 1995
    Assignees: Toyota Jidosha Kabushiki Kaisha, Toyo Aluminium Kabushiki Kaisha
    Inventors: Kunihiko Imahashi, Hirohisa Miura, Yasuhiro Yamada, Hirohumi Michioka, Jun Kusui, Akiei Tanaka
  • Patent number: 5315153
    Abstract: A ceramic package comprising an aluminum nitride substrate, an IC on the substrate, leads attached to the substrate, a metal cap covering the substrate, a resin layer for adhesion of the above elements, and a water-resistant coating on the inner surface of the resin layer.
    Type: Grant
    Filed: May 29, 1991
    Date of Patent: May 24, 1994
    Assignees: Toyo Aluminium Kabushiki Kaisha, Kabushiki Kaisha Enplas
    Inventors: Yuji Nagai, Eiki Tanikawa, Hisao Ohshima, Kazushige Kato
  • Patent number: 5173126
    Abstract: Discloses an aluminium brazing paste which not only has excellent preservability and coating performance but also reveals excellent brazing characteristics; said aluminium brazing paste according to this invention comprises, per 100 parts by weight of aluminum-containing metal powder with 10 to 500 .mu.m of mean particle size for aluminium brazing, of 0.5 to 15 parts by weight of flux and 30 to 80 parts by weight of a liquid polyisobutylene with 300 to 1500 of average molecular weight and/or its hydrogenated product.
    Type: Grant
    Filed: May 7, 1992
    Date of Patent: December 22, 1992
    Assignees: Kabushiki Kaisha Nihon Genma, Toyo Aluminium Kabushiki Kaisha
    Inventors: Toshiaki Ogura, Tadashi Takemoto, Tatsuyuki Ujie
  • Patent number: 4980223
    Abstract: A forming sheet for forming an article such as a housing for an electronic device having a shieldability against electromagnetic interference. It is made by laminating a conductive laminated sheet to a thermoplastic synthetic resin sheet through a hot melt adhesive layer. The conductive laminated sheet is formed by subjecting to heat shrinkage a substrate comprising a metallic film and a heat-shrinkable synthetic resin film laminated together through a discontinuous bonding layer. The conductive layer is less liable to crack due to stress applied during forming.
    Type: Grant
    Filed: July 25, 1989
    Date of Patent: December 25, 1990
    Assignees: Toyo Aluminium Kabushiki Kaisha, Tsutsunaka Plastic Industry Co. Ltd.
    Inventors: Toshihiko Nakano, Shoichi Makimoto, Hiroyoshi Nanri, Kazuhiro Ogawa, Haruhiro Fukuda
  • Patent number: 4961779
    Abstract: Disclosed are(1) a composite material of aluminum powder containing spherical carbon particles;(2) a composite material of aluminum powder having a good self-lubricity and a high wear resistance and consolidated with a mixture of(i) 100 parts by weight of aluminum particles of about 1 to about 200 .mu.m in mean particle size; and(ii) about 1 and about 100 parts by weight of spherical carbon particles of about 1 to about 50 .mu.m in mean particle size; and(3) a composite material of aluminum powder having a good self-lubricity, a high wear resistance and a high strength and consolidated with a mixture of(i) 100 parts of aluminum alloy particles containing about 0.3 to about 15% by weight of magnesium and having a mean particle size of about 1 to about 200 .mu.m; and(ii) about 1 to about 100 parts by weight of spherical carbon particles having a mean particle size of about 1 to about 50 .mu.m.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: October 9, 1990
    Assignee: Toyo Aluminium Kabushiki Kaisha
    Inventors: Jun Kusui, Akiei Tanaka, Masahiko Kawai
  • Patent number: 4959195
    Abstract: The invention provides a process for preparing a large-sized P/M aluminum alloy product comprising:extruding at a temperature between 350.degree. and 500.degree. C. and at an extrusion ratio of 2 to 10, aluminum alloy powder consisting essentially of (a) 5 to 30% by weight of Si, (b) 0.5 to 10% by weight of at least one species selected from the group consisting of Cu, Mg, Fe, Ni, Cr, Mn, Mo, Zr and V with the proviso that the total amount of these species cannot exceed 30% by weight, and (c) aluminum in a remaining amount.
    Type: Grant
    Filed: May 4, 1989
    Date of Patent: September 25, 1990
    Assignees: Sumitomo Electric Industries, Ltd., Toyo Aluminium Kabushiki Kaisha
    Inventors: Jun Kusui, Masahiko Kawai, Yusuke Odani, Yoshinobu Takeda
  • Patent number: 4936913
    Abstract: An aluminium flake pigment characterized in that the ratio of the average thickness of flakes to the average diameter of flakes is in the range of 0.025 to 0.3, preferably 0.028 to 0.1 and the ratio of the water covering area to the specific surface area is in the range of 0.18 to 0.4, preferably 0.19 to 0.35 is disclosed herein.The aluminium flake pigment of the invention has the improved resistance to the circulation of the metallic paint during the painting.
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: June 26, 1990
    Assignee: Toyo Aluminium Kabushiki Kaisha
    Inventor: Takao Hieda
  • Patent number: 4923689
    Abstract: Disclosed herein is an aluminum nitride powder having the improved water-resistance, which is obtained by treating the aluminum nitride powder with an inorganic or organic phosphoric acid compound followed by heating at about 150.degree. to 800.degree. C. when the organic phosphoric acid compound is used.
    Type: Grant
    Filed: July 18, 1989
    Date of Patent: May 8, 1990
    Assignee: Toyo Aluminium Kabushiki Kaisha
    Inventors: Masatoshi Uenishi, Yoshiki Hashizume, Takamasa Yokote
  • Patent number: 4869754
    Abstract: An aluminium pigment composition disclosed herein comprises aluminium flakes, phosphorus supplied from an inorganic phosphoric acid in an amount of 500 to 10,000 ppm based on the aluminium weight, an aliphatic compound having at least one functional group within a molecule in an amount of 0.3 to 5 parts by weight per 100 parts by weight of aluminium, water in an amount of 0.05 to 10 parts by weight of aluminium, a water-compatible alcohol in an amount of 5 to 100 parts by weight per 100 parts by weight of aluminium and a hydrocarbon oil in an amount of 1 to 70 parts by weight of aluminium. The aluminium pigment composition according to the invention is particularly suitable for incorporating in the water base paint.
    Type: Grant
    Filed: November 17, 1988
    Date of Patent: September 26, 1989
    Assignee: Toyo Aluminium Kabushiki Kaisha
    Inventors: Tetsufumi Kawabe, Toshiaki Bamba, Takashi Matsufuji, Hiroaki Ueshimo, Yoshiki Hashizume, Eikichi Uchimura, Masakatsu Harasda, Masahiro Aoki, Toru Kimura