Patents Assigned to Mitsui High-tec Inc.
  • Laminated iron core and method of manufacturing laminated iron core with caulking protrusion
    Patent number: 10109417
    Abstract: There is provided a laminated iron core including a plurality of piled iron core pieces, each piled iron core pieces being blanked from at least two piled sheet materials and sequentially laminated on other piled iron core pieces, wherein the piled iron core pieces adjacent in a direction of lamination are interlocked together by a plurality of caulking parts provided in each piled iron core pieces. Each of the plurality of caulking parts includes a caulking protrusion formed in one side and a caulking fitting groove formed in the other side to which the caulking protrusion is fitted, and the caulking protrusion is allowed to protrude to the caulking fitting groove of the piled iron core pieces adjacent thereto in the direction of lamination, and a width of the caulking protrusion is larger than an inner width of the caulking fitting groove.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: October 23, 2018
    Assignee: MITSUI HIGH-TEC, INC.
    Inventor: Izumi Nakamura
  • Method and apparatus for manufacturing laminated iron core
    Patent number: 10103612
    Abstract: A method of manufacturing a laminated iron core includes extruding resins from a plurality of plungers toward a plurality of through holes extending from an upper surface to a lower surface of a laminated body formed of a plurality of electromagnetic steel plates to fill the plurality of through holes with the resins. The plurality of plungers are mutually independent and an extrusion amount of the resin is controlled for each plunger.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: October 16, 2018
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Akira Nagai, Kazuki Namaike, Hidemi Sasaki
  • Method and apparatus for manufacturing laminated iron core
    Patent number: 10063126
    Abstract: There is provided a method for manufacturing a laminated iron core. The method includes receiving a plurality of block iron cores which are temporarily laminated and ejected from a die, each block iron core being formed by laminating a plurality of iron core pieces that are blanked from a thin plate workpiece using the die, individually separating the temporarily laminated block iron cores by a block iron core separating unit, and rotating and laminating each of the separated block iron cores by a rotating and laminating unit in order different from order of lamination of the temporarily laminated block iron cores before separation in a place different from a location of the die.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: August 28, 2018
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Hidemi Sasaki, Tadashi Shibuta
  • Processing device and processing method
    Patent number: 10058908
    Abstract: A processing device is provided which feeds a long plate body from an upstream side to a downstream side and sequentially carries out a press work including a blanking work to the long plate body. The processing device includes a plurality of stages provided along a feed direction of the long plate body, which has a die that applies the press work to the long plate body and a plurality of lifters provided along the feed direction of the long plate body which have lift-up parts that lift up the long plate body from the die. In the plurality of lifters, clearances by the lift-up parts of the lifters arranged in the downstream side are set to be larger than the clearances by the lift-up parts of the lifters arranged in the upstream side.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: August 28, 2018
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Masahiko Furuta, Kazufumi Yonemura
  • Apparatus for inspecting laminated iron core and method for inspecting laminated iron core
    Patent number: 10056810
    Abstract: There is provided an apparatus for inspecting a laminated iron core in which a plurality of iron core pieces are laminated. The apparatus includes an insertion jig being movable in a lamination direction of the laminated iron core along an inspection side surface of the laminated iron core while having a gap between the insertion jig and the inspection side surface of the laminated iron core, and a detecting sensor provided on the insertion jig and detecting a contact of the moving insertion jig with a projection which occurs on the inspection side surface of the laminated iron core.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: August 21, 2018
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Satoshi Matsubayashi, Jin Oda, Masumori Toyonaga
  • SEPARATOR PRODUCTION METHOD
    Publication number: 20180223408
    Abstract: A method of manufacturing a separator includes subjecting a metal thin sheet material to be transported to stepwise forming working at an identical location by a plurality of press machines having different working shapes and arranged sequentially from an upstream side to a downstream side in a transport direction of the metal thin sheet material to form a flow passage groove. The thin sheet material is subjected to annealing treatment in at least one space of spaces between the press machines arranged adjacent to each other in the transport direction of the thin sheet material.
    Type: Application
    Filed: August 15, 2016
    Publication date: August 9, 2018
    Applicant: MITSUI HIGH-TEC, INC.
    Inventor: Kiyohisa MAKI
  • Method of manufacturing laminated iron core
    Patent number: 10040111
    Abstract: A method of manufacturing a laminated iron core includes performing at least two kinds of selectively-actuated punching processes by actuating respective punching units to form a plurality of iron core pieces, each of the punching units being switchable between an active state or a non-active state, and caulking and laminating the plurality of iron core pieces to manufacture the laminated iron core. The selectively-actuated punching processes are performed in one operation by selectively actuating each of the punching units between the active state and the non-active state.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: August 7, 2018
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Souhachi Arima, Tomohiko Hayata
  • METHOD FOR MANUFACTURING LAMINATED IRON CORE
    Publication number: 20180212478
    Abstract: A method for manufacturing a laminated iron core includes providing a plurality of annular iron core piece rows, each of which is configured by annularly arranging a plurality of divided iron core pieces including yokes and teeth, and the yokes of the annularly-adjacent divided iron core pieces in the annular iron core piece row are mutually different in shape. In the method, the annular iron core piece rows are laminated by changing a rotational angle of the newly laminated annular iron core piece row relatively to the lastly laminated annular iron core piece row laminated so that the divided iron core piece with a shape different from that of the divided iron core piece is laminated on the lastly laminated divided iron core piece.
    Type: Application
    Filed: January 18, 2018
    Publication date: July 26, 2018
    Applicant: MITSUI HIGH-TEC, INC.
    Inventors: Shuichi NAKAMURA, Daisuke MOMOTA
  • Laminate and method for manufacturing the same and method for manufacturing laminated core
    Patent number: 10033232
    Abstract: This disclosure relates to a method for manufacturing a laminate used for manufacturing a laminated core including a circumferential yoke part and a plurality of magnetic pole parts radially extending from the yoke part. This method includes: feeding a metal sheet drawn from a roll thereof to a progressive die; stamping out a plurality of workpieces from the metal sheet in the progressive die, wherein each of the workpiece comprises a temporarily-interlocking portion between adjacent magnetic pole portions; and stacking the workpieces to integrate these workpieces together by the temporarily-interlocking portion to obtain the laminate.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: July 24, 2018
    Assignees: Honda Motor Co., Ltd., Mitsui High-tec, Inc.
    Inventors: Yukio Matsunaga, Hisatomo Ishimatsu, Yusuke Hasuo, Masahiro Izumi, Manabu Yazaki
  • METHOD OF MANUFACTURING LAMINATED CORE
    Publication number: 20180204676
    Abstract: In a method of manufacturing a laminated core, a laminated core body 14 including magnet insertion holes 12 and 13 with magnet pieces 15 inserted therein is placed between a molding (upper) die 10 and a retaining (lower) die 11, and a molding resin 19 is filled from resin reservoir portions (pots) 16 to fix the pieces 15 in the holes 12 and 13. Between the die 10 and the body 14, a guide member 18 is placed, which includes resin passages 31 provided from the portions 16 to the holes 12 and 13 and gates 30 connecting to the holes 12 and 13 on downstream sides of the passages 31. The method can reduce lead time of a production line without replacing the molding dies for different laminated rotor cores and thus without preparing different types of molding dies.
    Type: Application
    Filed: March 6, 2018
    Publication date: July 19, 2018
    Applicant: MITSUI HIGH-TEC, INC.
    Inventors: Akira Nagai, Go Kato, Kohei Yoshida
  • ARMATURE AND METHOD FOR PRODUCING ARMATURE
    Publication number: 20180198343
    Abstract: In a cross sectional plane perpendicular to a center axis line of an annular core, a connection projection and a connection recess have complementary configurations in which the connection projection and the connection recess are narrowed in width with distance from coupling surfaces, the connection projection and the connection recess respectively include a pair of friction surfaces and a pair of friction surfaces extending in a direction separate from the coupling surfaces, the friction surface of the connection projection is inclined relative to a virtual normal line perpendicular to a line connecting bottom portions of the pair of friction surfaces of the connection projection, and the friction surface of the connection recess is inclined relative to a virtual normal line perpendicular to a line connecting bottom portions of the pair of friction surfaces of the connection recess.
    Type: Application
    Filed: August 15, 2016
    Publication date: July 12, 2018
    Applicants: MITSUI HIGH-TEC, INC., ROBERT BOSCH GMBH
    Inventors: Masahiro IZUMI, Hirokazu ARAKAWA, Yusuke HASUO, Frank FRISTER, Achim NEUBAUER
  • DUMMY PLATE AND METHOD FOR MANUFACTURING ARMATURE
    Publication number: 20180183306
    Abstract: In a case where a permanent magnet is inserted into each of a plurality of magnet-insert holes of a laminated iron core and then a resin is injected into the plurality of magnet-insert holes from a resin pool pot formed in one of an upper die and a lower die with the laminated iron core pinched and the resin is cured inside the plurality of magnet-insert holes to fix the permanent magnets to the laminated iron core, a dummy plate which abuts on the laminated iron core and includes a gate hole for allowing passage of the resin delivered from the resin pool pot and guiding the resin to the plurality of magnet-insert holes. The gate hole partially overlaps with at least two of the plurality of magnet-insert holes in a plan view of the dummy plate and the laminated iron core.
    Type: Application
    Filed: December 20, 2017
    Publication date: June 28, 2018
    Applicant: MITSUI HIGH-TEC, INC.
    Inventor: Iwao MYOJIN
  • METHOD OF PUNCHING CORE PIECE AND STACKED CORE
    Publication number: 20180175686
    Abstract: A stacked core includes a plurality of core pieces that are arranged in a stack. Each of the core pieces has a plurality of magnet insertion holes. A bridge is provided between a radially-outer end of each of the magnet insertion holes and an outer region of each of the core pieces, A radially-outer contour of the bridge is provided on a radially-inner side of a blanking-contour line of each of the core pieces.
    Type: Application
    Filed: February 13, 2018
    Publication date: June 21, 2018
    Applicants: MITSUI HIGH-TEC, INC., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinya SANO, Masahiro IZUMI
  • METHOD AND APPARATUS FOR MANUFACTURING LAMINATED IRON CORE
    Publication number: 20180166214
    Abstract: A method for manufacturing a laminated iron core includes preheating a laminated body in which a plurality of iron core pieces are laminated and which includes a resin filling hole, measuring a temperature of the laminated body after preheating the laminated body, determining whether or not the temperature measured is within a predetermined range, feeding the laminated body into a molding device in a case where it is determined that the temperature is within the predetermined range, and filling the resin filling hole of the laminated body with a resin material in the molding device.
    Type: Application
    Filed: December 7, 2017
    Publication date: June 14, 2018
    Applicant: MITSUI HIGH-TEC, INC.
    Inventors: Katsumi AMANO, Yukiya FUKUNAGA, Takashi FUKUMOTO
  • Method for manufacturing laminated rotor core
    Patent number: 9979264
    Abstract: A method for manufacturing a laminated rotor core comprises a first step of positioning and mounting a laminated core body 14 on a mounting table 17 of a carrying tray 16, a second step of positioning and arranging the laminated core body 14 mounted on a mounting table 17 on a lower die 28, the laminated core body 14 having permanent magnets 15 inserted into respective magnet insertion holes 11 and 12, and clamping the laminated core body 14 mounted on the mounting table 17 by an upper die 29 and a lower die 28, and a third step of pushing resin out of resin reservoir pots 42 provided in the lower die 28 and filling the respective corresponding magnet insertion holes 11 and 12 of the laminated core body 14 with the resin through resin passages 43 formed in the mounting table 17.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: May 22, 2018
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Hisatomo Ishimatsu, Hirotoshi Mabu, Yoshiaki Yamamoto, Iwao Myojin
  • RESIN INJECTION APPARATUS AND METHOD OF MANUFACTURING CORE PRODUCT
    Publication number: 20180117806
    Abstract: A resin injection apparatus includes: a mold die and a receiving die configured to hold a core body in an axial direction of the core body, the core body having a resin formation region serving as a region where resin is to be formed by injection of molten resin; a plurality of plungers; and a pot group attached to the mold die, the pot group including a plurality of pots proximately located next to each other in a direction. Each of the plurality of pots has a through hole in which a corresponding plunger of the plungers is insertable. The plurality of pots have a first coefficient of thermal expansion that is lower than a second coefficient of thermal expansion of the mold die.
    Type: Application
    Filed: October 27, 2017
    Publication date: May 3, 2018
    Applicant: Mitsui High-tec, Inc.
    Inventor: Hirotoshi MABU
  • Method of manufacturing laminated core
    Patent number: 9947464
    Abstract: In a method of manufacturing a laminated core, a laminated core body 14 including magnet insertion holes 12 and 13 with magnet pieces 15 inserted therein is placed between a molding (upper) die 10 and a retaining (lower) die 11, and a molding resin 19 is filled from resin reservoir portions (pots) 16 to fix the pieces 15 in the holes 12 and 13. Between the die 10 and the body 14, a guide member 18 is placed, which includes resin passages 31 provided from the portions 16 to the holes 12 and 13 and gates 30 connecting to the holes 12 and 13 on downstream sides of the passages 31. The method can reduce lead time of a production line without replacing the molding dies for different laminated rotor cores and thus without preparing different types of molding dies.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: April 17, 2018
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Akira Nagai, Go Kato, Kohei Yoshida
  • Stacked core having a plurality of core pieces and a bridge portion
    Patent number: 9948153
    Abstract: A stacked core includes a plurality of core pieces that are arranged in a stack. Each of the core pieces has a plurality of magnet insertion holes. A bridge is provided between a radially-outer end of each of the magnet insertion holes and an outer region of each of the core pieces, A radially-outer contour of the bridge is provided on a radially-inner side of a blanking-contour line of each of the core pieces.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: April 17, 2018
    Assignees: MITSUI HIGH-TEC, INC., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masahiro Izumi, Shinya Sano
  • Method for manufacturing band-shaped stator core sheets
    Patent number: 9935530
    Abstract: Provided are a method for manufacturing band-shaped stator core sheets, capable of efficiently separating the band-shaped stator core sheets having engaged magnetic pole pieces, and a die apparatus used therefor. The method comprises placing tips of magnetic pole pieces 12, 13 of first and second band-shaped stator core sheets 10, 11 on inner peripheries of yoke pieces 16, 15, a slot punching step for forming gaps of the magnetic pole pieces 12, 13, a shear-cutting step for cutting the tips of the magnetic pole pieces 12, 13 from the inner peripheries of the yoke pieces 16, 15, respectively, a correction step for returning the magnetic pole pieces 12, 13 bent by the shear-cutting step to their original states, and a separation step for separating the first and second band-shaped stator core sheets 10, 11 with the magnetic pole pieces 12, 13 pressed back by the correction step.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: April 3, 2018
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Yohei Toyomaru, Shusaku Munaoka, Yoshiharu Kouno
  • METHOD OF MANUFACTURING LAMINATED ROTOR CORE AND APPARATUS FOR MANUFACTURING LAMINATED ROTOR CORE
    Publication number: 20180076700
    Abstract: A method of manufacturing a rotor core having a plurality of core members stacked together includes determining weight imbalances for the plurality of core members with respect to a central axis of the rotor core; combining the weight imbalances of the plurality of core members to determine a weight distribution of the rotor core; and displacing the weight imbalances of one or more of the plurality of core members to adjust a position of the weight distribution of the rotor core with respect to the central axis.
    Type: Application
    Filed: September 4, 2017
    Publication date: March 15, 2018
    Applicant: Mitsui High-tec, Inc.
    Inventors: Akira NAGAI, Kenji KATSUKI, Go KATO