Patents by Inventor Hirotoshi Mabu
Hirotoshi Mabu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11279069Abstract: The manufacturing method of a motor core includes attaching an ID code to a stack of blanked members in which a magnet insertion hole to fill with a resin material is formed, the ID code containing information in accordance with a type of the stack, reading the information from the ID code which is attached to the stack, and setting a mold condition based on the information read from the ID code. The mold condition includes at least one type of condition including: the resin material to be injected to the magnet insertion hole, an injection amount of the resin material, and a discharge position of the resin material. A mold device is controlled to inject the resin material to the magnet insertion hole in accordance with the mold condition.Type: GrantFiled: September 14, 2018Date of Patent: March 22, 2022Inventors: Hisatomo Ishimatsu, Shuhei Kotani, Hirotoshi Mabu, Tomoyoshi Ichimaru
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Patent number: 11190087Abstract: A method for manufacturing a laminated iron core including placing a laminated iron core body on a conveyance jig. Downwardly moving the conveyance jig by a lift and downwardly moving an upper die with respect to a lower die of the die unit. The lift being mounted so as to be unaffixed to both the die unit and the conveyance jig. Holding the laminated iron core body placed on the conveyance jig from both sides in a lamination direction of the plurality of iron core pieces between the lower die and the upper die, the lower die coming into contact with the conveyance jig. Injecting a resin into a through hole formed through the laminated iron core body held by the die unit in the lamination direction of the plurality of iron core pieces from the lower die through the conveyance jig or from the upper die.Type: GrantFiled: January 3, 2020Date of Patent: November 30, 2021Assignee: MITSUI HIGH-TEC, INC.Inventors: Hirotoshi Mabu, Hidemi Sasaki
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Patent number: 10821637Abstract: 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: GrantFiled: October 27, 2017Date of Patent: November 3, 2020Inventor: Hirotoshi Mabu
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Patent number: 10666120Abstract: 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: GrantFiled: August 2, 2017Date of Patent: May 26, 2020Assignee: MITSUI HIGH-TEC, INC.Inventors: Hirotoshi Mabu, Satoshi Matsubayashi
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Publication number: 20200144899Abstract: A method for manufacturing a laminated iron core including placing a laminated iron core body on a conveyance jig. Downwardly moving the conveyance jig by a lift and downwardly moving an upper die with respect to a lower die of the die unit. The lift being mounted so as to be unaffixed to both the die unit and the conveyance jig. Holding the laminated iron core body placed on the conveyance jig from both sides in a lamination direction of the plurality of iron core pieces between the lower die and the upper die, the lower die coming into contact with the conveyance jig. Injecting a resin into a through hole formed through the laminated iron core body held by the die unit in the lamination direction of the plurality of iron core pieces from the lower die through the conveyance jig or from the upper die.Type: ApplicationFiled: January 3, 2020Publication date: May 7, 2020Applicant: MITSUI HIGH-TEC, INC.Inventors: Hirotoshi MABU, Hidemi SASAKI
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Patent number: 10615673Abstract: 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: GrantFiled: August 4, 2017Date of Patent: April 7, 2020Assignee: MITSUI HIGH-TEC, INC.Inventors: Hirotoshi Mabu, Satoshi Matsubayashi
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Patent number: 10560005Abstract: An apparatus for manufacturing a laminated iron core includes a conveyance jig on which a laminated iron core body is placed, a die unit including a lower die and an upper die upwardly and downwardly movable with respect to the lower die, which holds the laminated iron core body placed on the conveyance jig from both sides in a lamination direction of the laminated iron core body between the lower die and the upper die, an injector injecting a resin into a through hole formed through the laminated iron core body held by the die unit from the lower die through the conveyance jig or the upper die, and an upward and downward movement unit capable of upwardly and downwardly moving the conveyance jig with respect to the lower die, and being provided independently from the die unit.Type: GrantFiled: August 15, 2016Date of Patent: February 11, 2020Assignee: MITSUI HIGH-TEC, INC.Inventors: Hirotoshi Mabu, Hidemi Sasaki
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Patent number: 10498203Abstract: A laminated rotor core (36) wherein permanent magnets (47) are inserted in respective magnet insertion holes (46) is disposed between and pressed by an upper die (37) and a lower die (29). The upper die (37) has resin reservoir pots (50) provided above the laminated rotor core (36) and at positions corresponding to the respective magnet insertion holes (46). Raw resin material put in the resin reservoir pots (50) is heated by the upper die (37). Subsequently, the resin material in a liquefied state is ejected from the resin reservoir pots (50) by plungers (52) that are inserted and moves vertically in the resin reservoir pots (50) and is directly filled in the magnet insertion holes (46). Consequently, the respective magnet insertion holes (46) are filled with the resin material more evenly and highly reliable products can be supplied at low cost.Type: GrantFiled: February 4, 2014Date of Patent: December 3, 2019Assignee: MITSUI HIGH-TEC, INC.Inventors: Satoshi Matsubayashi, Hirotoshi Mabu, Katsumi Amano, Atsushi Shiraishi
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Publication number: 20190089231Abstract: The manufacturing method of a motor core includes attaching an ID code to a stack of blanked members in which a magnet insertion hole to fill with a resin material is formed, the ID code containing information in accordance with a type of the stack, reading the information from the ID code which is attached to the stack, and setting a mold condition based on the information read from the ID code. The mold condition includes at least one type of condition including: the resin material to be injected to the magnet insertion hole, an injection amount of the resin material, and a discharge position of the resin material. A mold device is controlled to inject the resin material to the magnet insertion hole in accordance with the mold condition.Type: ApplicationFiled: September 14, 2018Publication date: March 21, 2019Applicant: Mitsui High-tec, Inc.Inventors: Hisatomo ISHIMATSU, Shuhei KOTANI, Hirotoshi MABU, Tomoyoshi ICHIMARU
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Patent number: 9979264Abstract: 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: GrantFiled: February 26, 2013Date of Patent: May 22, 2018Assignee: MITSUI HIGH-TEC, INC.Inventors: Hisatomo Ishimatsu, Hirotoshi Mabu, Yoshiaki Yamamoto, Iwao Myojin
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Publication number: 20180117806Abstract: 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: ApplicationFiled: October 27, 2017Publication date: May 3, 2018Applicant: Mitsui High-tec, Inc.Inventor: Hirotoshi MABU
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Publication number: 20180048220Abstract: 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: ApplicationFiled: August 4, 2017Publication date: February 15, 2018Applicant: MITSUI HIGH-TEC, INC.Inventors: Hirotoshi MABU, Satoshi MATSUBAYASHI
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Publication number: 20180041101Abstract: 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: ApplicationFiled: August 2, 2017Publication date: February 8, 2018Applicant: MITSUI HIGH-TEC, INC.Inventors: Hirotoshi MABU, Satoshi MATSUBAYASHI
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Patent number: 9819251Abstract: 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: GrantFiled: August 5, 2015Date of Patent: November 14, 2017Assignee: MITSUI HIGH-TEC, INC.Inventor: Hirotoshi Mabu
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Publication number: 20170054350Abstract: An apparatus for manufacturing a laminated iron core includes a conveyance jig on which a laminated iron core body is placed, a die unit including a lower die and an upper die upwardly and downwardly movable with respect to the lower die, which holds the laminated iron core body placed on the conveyance jig from both sides in a lamination direction of the laminated iron core body between the lower die and the upper die, an injector injecting a resin into a through hole formed through the laminated iron core body held by the die unit from the lower die through the conveyance jig or the upper die, and an upward and downward movement unit capable of upwardly and downwardly moving the conveyance jig with respect to the lower die, and being provided independently from the die unit.Type: ApplicationFiled: August 15, 2016Publication date: February 23, 2017Applicant: MITSUI HIGH-TEC, INC.Inventors: Hirotoshi MABU, Hidemi SASAKI
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Patent number: 9520218Abstract: A method of resin-sealing for a laminated core includes the steps of: holding by sandwiching a core body 11 between a resin injection mold 20 and a supporting mold 21; extruding a molten resin using a plunger 37 from a resin reservoir pot 24 provided in the resin injection mold 20; and resin-sealing the permanent magnets 18 in the magnet insertion holes 16 and 17, wherein a material of the resin reservoir pot 24 of the resin injection mold 20 and a region through which the resin passes from the resin reservoir pot 24 is a superhard material, and wear in the resin injection mold 20 due to a flow of the resin is reduced. With this, a gap between the resin reservoir pot 24 and the resin injection mold 20 due to a difference in thermal expansion is less easily produced.Type: GrantFiled: October 22, 2013Date of Patent: December 13, 2016Assignee: MITSUI HIGH-TEC, INC.Inventor: Hirotoshi Mabu
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Patent number: 9373991Abstract: A method for manufacturing a laminated iron core is provided. A laminated iron core body including a permanent magnet inserted into a magnet-insert hole is arranged between a molding die and a holding die. A cull plate is arranged between the molding die and the laminated iron core body. The cull plate has a groove shaped runner directed toward the magnet-insert hole from a resin reservoir and provided with a gate hole communicating with the magnet-insert hole, and a through hole which vertically passes through the cull plate is formed in the runner of the cull plate at a different position from a position of the gate hole. After the magnet-insert hole is filled with the mold resin a resin residue remaining in the cull plate is pushed off and removed from the gate hole and the through hole.Type: GrantFiled: November 5, 2013Date of Patent: June 21, 2016Assignee: MITSUI HIGH-TEC, INC.Inventor: Hirotoshi Mabu
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Publication number: 20160056694Abstract: 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: ApplicationFiled: August 5, 2015Publication date: February 25, 2016Applicant: MITSUI HIGH-TEC , INC.Inventor: Hirotoshi MABU
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Publication number: 20150054196Abstract: 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: ApplicationFiled: February 26, 2013Publication date: February 26, 2015Applicant: Mitsui High-tec, INC.Inventors: Hisatomo Ishimatsu, Hirotoshi Mabu, Yoshiaki Yamamoto, Iwao Myojin
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Patent number: 8869379Abstract: A method of producing a rotor includes crimping and stacking a plurality of core pieces through crimping connecting portions to form a rotor stacked core having a magnet-insertion hole and inserting a permanent-magnet pieces into the magnet-insertion hole. Further, the method also includes clamping the rotor stacked core between an upper die and a lower die, and filling a resin into the magnet-insertion hole from a resin reservoir pot which is formed in the upper die or the lower die. Also, the resin may be filled into the magnet-insertion hole while placing the crimping connecting portions at a center of the resin reservoir pot.Type: GrantFiled: November 9, 2010Date of Patent: October 28, 2014Assignee: Mitsui High-Tec, Inc.Inventors: Hirotoshi Mabu, Kohei Yoshida