Patents Assigned to Mitsui High-tec Inc.
  • Lead frame
    Patent number: 9911714
    Abstract: A lead frame includes adjacent die pads which lie adjacent to each other; grounding leads extended from the adjacent die pads; a connecting bar by which the grounding leads extended from the adjacent die pads are interconnected. The grounding leads and the connecting bar are formed to be thinner at one surface than a maximum thickness of leads of the lead frame, the grounding leads extended from the adjacent die pads are aligned on a common axis while providing the connecting bar between the grounding leads, and a support projection is provided at the one surface on the connecting bar in the common axis.
    Type: Grant
    Filed: January 2, 2014
    Date of Patent: March 6, 2018
    Assignee: MITSUI HIGH-TEC, INC.
    Inventor: Takahiro Ishibashi
  • APPARATUS AND METHOD FOR INJECTING RESIN INTO LAMINATED IRON CORE
    Publication number: 20180048220
    Abstract: An apparatus includes a mold unit and a receive unit which clamp a laminated iron core body from both sides in a lamination direction, the laminated iron core body including a plurality of laminated iron core pieces and a resin hole pierced in the lamination direction, a plunger which extrudes a resin of an inside of a resin pool part formed in the mold unit, and a cull plate arranged between the laminated iron core body and the mold unit. The cull plate includes a close contact part with the resin on a side opposed to the plunger, the close contact part including a projection projected to a side of the plunger beyond a groove bottom of a runner formed in the cull plate, or a recess recessed to a side of the laminated iron core body beyond the groove bottom of the runner.
    Type: Application
    Filed: August 4, 2017
    Publication date: February 15, 2018
    Applicant: MITSUI HIGH-TEC, INC.
    Inventors: Hirotoshi MABU, Satoshi MATSUBAYASHI
  • METHOD FOR INJECTING RESIN INTO LAMINATED IRON CORE
    Publication number: 20180041101
    Abstract: A method includes arranging and clamping a laminated iron core body between a receive unit and a mold unit that includes a resin pool part, the laminated iron core body including a plurality of laminated iron core pieces and a resin hole pierced in the lamination direction, with the laminated iron core body being clamped, extruding a resin of an inside of the resin pool part using a plunger and injecting the resin into the resin hole, after curing the resin in the resin hole, separating unwanted resin from the plunger by moving the plunger by a given distance in a direction away from the laminated iron core body before the laminated iron core body with unwanted resin is detached from the mold unit, and after separating the unwanted resin from the plunger, moving the plunger to the side of the laminated iron core body.
    Type: Application
    Filed: August 2, 2017
    Publication date: February 8, 2018
    Applicant: MITSUI HIGH-TEC, INC.
    Inventors: Hirotoshi MABU, Satoshi MATSUBAYASHI
  • Blanking die apparatus and method for manufacturing laminated iron core
    Patent number: 9887038
    Abstract: A blanking die apparatus includes a lower die in which a plurality of working stations are arranged, and an upper the which moves upward and downward with respect to the lower die. A progressively fed sheet is sequentially blanked or stamped out respectively in the working stations to form iron core pieces, and then to laminate the iron core pieces to form a laminated iron core. The lower die includes a lifter part which lifts the sheet from the lower die when the sheet is progressively fed. The lifter part first lifters installed in an outer peripheral area in each of the working stations, and second lifters installed on an upper surface of a blank die which has a blanking hole formed for blanking the iron core pieces in an external form, or on an upper surface of a blank die holder.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: February 6, 2018
    Assignee: MITSUI HIGH-TEC, INC.
    Inventor: Shigetoshi Yamato
  • Lead frame and manufacturing method of lead frame
    Patent number: 9852929
    Abstract: A lead frame includes a lead frame body processed in a predetermined shape, and including a notched part provided at an end of the lead frame body, the notched part being used as a starting point of tape-removing, a resin leakproof tape stuck on a back surface of the lead frame body, and a region of a periphery of the notched part in the back surface of the lead frame body, the region being reduced in a strength of bonding between the resin leakproof tape and the lead frame body is reduced relative to other region.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: December 26, 2017
    Assignee: MITSUI HIGH-TEC, INC.
    Inventor: Takahiro Ishibashi
  • Apparatus and method for manufacturing thin uneven member
    Patent number: 9821360
    Abstract: There is provided an apparatus for manufacturing a thin uneven member. The apparatus includes a lower die fixed to a press bed, an upper die fixed to a ram and disposed opposed to the lower die, and a pressure-drive unit which presses the ram using a servo motor as a power source, the servo motor being fixed to a first support member. The pressure-drive unit includes a motion converting mechanism which converts a rotation of the servo motor to a linear motion of a lifting member, and a cylinder block connected and fixed to the first support member and including first and second pistons arranged in series vertically, wherein the first piston is connected to the lifting member through a second support member, and the second piston, larger in diameter than the first piston, presses the ram.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: November 21, 2017
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Satoshi Matsubayashi, Kiyohisa Maki, Toshihiko Ezaki, Takeshi Sato, Kouji Fukunaga
  • Lead frame and method for manufacturing same
    Patent number: 9824960
    Abstract: Provided is a lead frame including: one or more solder bonding regions containing copper material or copper plating; and a molding resin adhesion region containing a copper oxide film. The solder bonding regions are exposed on a surface of the lead frame. Further, provided is a lead frame manufacturing method including: forming a resist film in a molding resin adhesion region that is included in a surface of a lead frame member made of copper, or that is included in a surface of a copper-plated lead frame member; forming a plating film by performing a metal plating process on one or more solder bonding regions included in the surface of the lead frame member; removing the resist film; and forming a copper oxide film by oxidizing the molding resin adhesion region.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: November 21, 2017
    Assignee: Mitsui High-tec, Inc.
    Inventors: Takahiro Ishibashi, Kimihiko Kubo, Ryota Furuno, Takaaki Katsuda
  • Resin sealing method of motor core
    Patent number: 9819251
    Abstract: Provided is a resin sealing method of a motor core having a rotor core and a stator core formed in such a way that a plurality of iron core pieces is laminated. The resin sealing method includes pressing the rotor core and the stator core from a direction of lamination by using a set of an upper die and a lower die, then extruding a resin stored in a resin reservoir pot provided in one or both of the upper die and the lower die by using a plunger and allowing a magnet-insert hole formed in the direction of lamination of the rotor core and a connection hole formed in the direction of lamination of the stator core to be filled with the resin and harden the resin.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: November 14, 2017
    Assignee: MITSUI HIGH-TEC, INC.
    Inventor: Hirotoshi Mabu
  • METHOD FOR MEASURING LAMINATED IRON CORE
    Publication number: 20170307361
    Abstract: There is provided a method for measuring a laminated iron core. The method includes preparing a laminated iron core in which two or more kinds of metal plates with different shapes are laminated and a deformed part is formed inside a hole continuing in a lamination direction of the laminated iron core, acquiring a surface profile data indicating a surface shape of the deformed part through an inlet of the hole by a non-contact sensor located in an outside of the hole, and calculating a size of the deformed part by a calculator based on the surface profile data.
    Type: Application
    Filed: April 21, 2017
    Publication date: October 26, 2017
    Applicant: MITSUI HIGH-TEC, INC.
    Inventors: Go KATO, Takashi FUKUMOTO, Kazuki NAMAIKE, Syoichi ONO
  • Manufacturing method for laminated iron core
    Patent number: 9782959
    Abstract: A manufacturing method for laminated iron cores includes processing a metal sheet to form product sheets, in each of which iron core pieces are arranged inside an outer frame piece and the iron core pieces are connected to the outer frame piece in such a way that outer peripheral sides of the iron core pieces are connected to nearest parts of the outer frame piece through bridge pieces, laminating the product sheets and temporarily fixing the product sheets adjacent to each other in a vertical direction together to form a sheets laminated body including iron core pieces laminated parts and bridge pieces laminated parts, sealing the iron core pieces laminated parts by a resin while being pressurized to form pre-formed laminated iron cores, and separating the bridge pieces laminated parts from the pre-formed laminated iron cores to form the laminated iron cores which are individually separated.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: October 10, 2017
    Assignee: MITSUI HIGH-TEC, INC.
    Inventor: Koji Shimizu
  • METHOD FOR MANUFACTURING LAMINATED IRON CORE AND APPARATUS FOR MANUFACTURING LAMINATED IRON CORE
    Publication number: 20170278628
    Abstract: A method for manufacturing a laminated iron core includes setting a blanking position on a strip-shaped workpiece for iron core pieces each including a yoke piece part having a linear shape and a magnetic pole piece part extending from the yoke piece part, such that a pair of iron core pieces are opposed each other and the magnetic pole piece part of one iron core piece is arranged between adjacent magnetic pole piece parts of the other iron core piece among the pair of iron core pieces, simultaneously blanking a front end side of the magnetic pole piece part and a back surface side of the yoke piece part of the one iron core piece from the strip-shaped workpiece before simultaneously blanking those of the other iron core piece from the strip-shaped workpiece, and blanking the iron core pieces from the strip-shaped workpiece.
    Type: Application
    Filed: March 16, 2017
    Publication date: September 28, 2017
    Applicants: MITSUI HIGH-TEC, INC., MITSUBISHI ELECTRIC CORPORATION
    Inventors: Akihiro HASHIMOTO, Masahiko FURUTA, Toshio GOTO, Yoshihiro HARADA, Yoshiro IMAZAWA
  • Method of manufacturing laminated rotor core
    Patent number: 9768673
    Abstract: There is provided a method of manufacturing a laminated rotor core, including: a mounting step of placing a core body on a carrier tray, the core body having a plurality of magnet insertion holes provided around the shaft hole, the carrier tray having a mount plate and a columnar guide member standing on a front surface of the mount plate 41, the placement of the core body being carried out by fitting the guide member into the shaft hole; an inserting step of inserting permanent magnets respectively in the magnet insertion holes; an injecting step of injecting a liquefied resin material in each of the magnet insertion holes; and a first preheating step of heating the core body before the mounting step, wherein the inserting step and the injecting step are carried out in a state in which the core body is placed on the carrier tray.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: September 19, 2017
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Akira Nagai, Go Kato, Mei Ogata
  • Die apparatus and manufacturing method of metal product using die apparatus
    Patent number: 9757786
    Abstract: A die apparatus includes a first die and a second die which are respectively used in adjacent working stations that sequentially blank or stamp out a progressively fed thin metal sheet. The first and second dies are held in a state where outer peripheral surfaces of the first and second dies directly contact each other.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: September 12, 2017
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Akihiro Hashimoto, Kenichirou Iwata
  • TRAY AND HEAT TREATMENT METHOD
    Publication number: 20170248367
    Abstract: A tray is provided for conveying a workpiece placed on the tray inside a heat treatment furnace. The tray includes plural kinds of positional displacement regulating parts for respectively regulating horizontal positional displacements of plural kinds of workpieces with different sizes, wherein the plural kinds of positional displacement regulating parts are arranged concentrically in a plane shape.
    Type: Application
    Filed: February 14, 2017
    Publication date: August 31, 2017
    Applicant: MITSUI HIGH-TEC, INC.
    Inventors: Takeaki KOZONO, Yusuke HASUO
  • Method and apparatus for inspecting laminated iron core
    Patent number: 9709508
    Abstract: There is provided a method for inspecting a laminated iron core structured by laminating a plurality of iron core pieces-having a predetermined shape and including therein a cooling flow path allowing refrigerant to flow therethrough, the refrigerant being supplied and discharged through openings formed at different positions. The method includes arranging a light projecting part and a light receiving part of a photosensor in the openings of the cooling flow path, respectively, and detecting light from the light projecting part by the light receiving part to thereby inspect a penetrating state of the cooling flow path.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: July 18, 2017
    Assignees: MITSUI HIGH-TEC, INC., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tadashi Shibuta, Masashi Matsumoto, Tatsuhiko Mizutani, Yoshitada Yamagishi
  • Method of resin-sealing laminated core
    Patent number: 9705369
    Abstract: A method of resin-sealing a laminated core, including inserting permanent magnets 24 into magnet insertion holes 18 of a core body 15, pressing the body 15 with upper and lower dies 11, 12, and injecting resin 29 to the holes 18 from a resin reservoir 17 of the die 11 or 12 via a runner 19 in a removable cull plate 14, one end of the runner 19 having plural resin injection holes 33, 34 per hole 18. The resin 29 presses the magnets 24 in the holes 18 to one sides in a radial direction of the holes 18. Thereby, resin-sealing is performed using the plate 14 and the magnets 24 are arranged in radially outward or inward sides even with narrow gaps between the magnets 24 and the holes 18 or without resin injection holes in centers in a width direction of the holes 18.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: July 11, 2017
    Assignee: MITSUI HIGH-TEC, INC.
    Inventor: Hisatomo Ishimatsu
  • Method for producing rotor laminated core
    Patent number: 9692281
    Abstract: There is provided a method for producing a rotor laminated core by laminating circular core pieces. The method determines a first blanking area, a second blanking area and a third blanking area in the magnetic steel board, wherein the first blanking area defines a shape of the core piece, the second blanking area defines a shape of a magnet-insertion hole, and the third blanking area defines a shape of an arbitrary part in the magnetic steel board. The method also forms a temporary aperture in the second blanking area, forms a thinning part which extends from the temporary aperture to the third blanking area, and blanks the first blanking area, the second blanking area and the third blanking area, thereby producing each circular core piece including the thinning part and magnet-insertion holes formed in a circumferential direction.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: June 27, 2017
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Akihiro Hashimoto, Takahiro Shimizu
  • Rotor having permanent magnet and method of manufacturing the same
    Patent number: 9653975
    Abstract: A rotor having permanent magnets 10 includes: a laminated core body 13 having a shaft hole 12 in the center thereof and magnet insertion holes 15 around the shaft hole 12; permanent magnets 16 disposed in the respective magnet insertion holes 15; and first and second end face plates 18, 19 disposed on one axial end and the other axial end of the laminated core body 13, respectively, the first and second end face plates 18, 19 including first and second through holes 32, 33, respectively. The first and second through holes 32, 33 each overlap a contour of a magnet insertion hole 15 on a radially inner side or a radially outer side in a plan view, and have first and second tapered portions 34, 35 gradually expanding the diameter toward the magnet insertion hole 15, respectively.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: May 16, 2017
    Assignees: MITSUI HIGH-TEC, INC., HONDA MOTOR CO., LTD.
    Inventors: Hisatomo Ishimatsu, Manabu Yazaki, Koichi Ono
  • Method for manufacturing laminated iron core
    Patent number: 9647518
    Abstract: In a method for manufacturing a laminated iron core from a thin sheet, the method includes coining the thin sheet from below to form a thinned bridge portion on an outer peripheral portion of an iron core piece, blanking the iron core piece from the thin sheet from above or below after forming the bridge portion, and laminating the iron core piece on another iron core piece to manufacture the laminated iron core.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: May 9, 2017
    Assignees: MITSUI HIGH-TEC, INC., PANASONIC CORPORATION
    Inventors: Akihiro Hashimoto, Tadashi Iida, Kiyomi Kawamura, Koichi Mitamura
  • Method for manufacturing laminated iron core
    Patent number: 9641055
    Abstract: In a method for manufacturing a laminated iron core from a thin sheet, the method includes coining the thin sheet from above to form a thinned bridge portion on an outer peripheral portion of an iron core piece, blanking the iron core piece downwardly from the thin sheet using a set of an outer-shape blanking punch and a die after forming the bridge portion, wherein the outer-shape blanking punch includes a projection portion fitted into the bridge portion when blanking, and laminating the iron core piece on another iron core piece to manufacture the laminated iron core.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: May 2, 2017
    Assignees: MITSUI HIGH-TEC, INC., PANASONIC CORPORATION
    Inventors: Akihiro Hashimoto, Tadashi Iida, Kiyomi Kawamura, Koichi Mitamura