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Motor Core

Magnet Mold

Magnet Mold™

By filling thermosetting epoxy resin, magnets are bonded inside of holes of Rotor cores.
Compared to the conventional bonding process, Magnet Mold has higher filling rate and shorter cure time.
Applying high precise mold enable to produce high efficiency Rotor Cores at low cost.
Mitsui High-tec, Inc. holds a patent of Magnet Mold.

Integral- Stacked Segment Core

Integral- Stacked Segment Core

The segment core is emitted from Dies with shape of one body core.
We stamp both Stator segment and Rotor cores together which improve the productivity.We also stamp integral Stacked Segment Core with in tool rotation producing high precision motor core.
Compared to previous segment core, Integral-Stacked Segment core reduce cogging torque by eliminating gap between each tooth.
Mitsui High-tec, Inc. holds a patent of the process of Integral-Stacked Segment Core.

MAGNET MOLD™ Patents List

Update date:2021/4/23

Mitsui High-tec's technology related to MAGNET MOLD is protected by the following patents.
Additional patents are pending in Japan and elsewhere.

Japanese patent

  • 4688505
  • 3786946
  • 4850528
  • 4685661
  • 4842670
  • 4856990
  • 4855123
  • 4855125
  • 4562692
  • 4611249
  • 4137962
  • 4414417
  • 5103000
  • 4388988
  • 5581013
  • 5529447
  • 5554527
  • 5023124
  • 4688950
  • 5560031
  • 5202566
  • 4991900
  • 5734963
  • 5560138
  • 5399343
  • 5291680
  • 5748465
  • 5805385
  • 4865086
  • 5566314
  • 5773678
  • 5681027
  • 5951194
  • 5794848
  • 5357217
  • 5777450
  • 5486574
  • 5458082
  • 5911312
  • 5931467
  • 5908322
  • 5855515
  • 6018795
  • 5996934
  • 6013683
  • 5981225
  • 6144883
  • 5981295
  • 6355886
  • 6088801
  • 5968761
  • 6449530
  • 6059024
  • 5632501
  • 6148895
  • 6144533
  • 6144535
  • 6193639
  • 5451934
  • 5705915
  • 6153826
  • 5635667
  • 5726262
  • 5663643
  • 6138673
  • 5735145
  • 6401486
  • 6320860
  • 6162656
  • 6322519
  • 6434254
  • 6392626
  • 6498430
  • 6441071
  • 5985707
  • 5946938
  • 6570927
  • 6546486
  • 5985734
  • 6180569
  • 6130028
  • 6279685
  • 6275794
  • 4429258
  • 5283561
  • 5490848
  • 5502951
  • 5996960
  • 6668014
  • 6761762
  • 6793491
  • 6793495
  • 6827799

U.S. Patent

  • 7897089
  • 8268219
  • 8728375
  • 10498203
  • 7854056
  • 7653984
  • 7950133
  • 8127431
  • 8020280
  • 9003639
  • 8058767
  • 8922084
  • 8869379
  • 8578592
  • 9548644
  • 9455612
  • 10177636
  • 9947464
  • 10283264
  • 8991035
  • 9431883
  • 9979264
  • 9705369
  • 9520218
  • 9373991
  • 9768673
  • 9564790
  • 9692281
  • 10622873
  • 9819251
  • 10103612
  • 10560005
  • 10447123
  • 10468950
  • 10666120
  • 10615673
  • 10821637

Chinese patent

  • 101356711
  • 101917096
  • 102170201
  • 101379682
  • 101390273
  • 101401279
  • 102804561
  • 102652389
  • 102598490
  • 102906968
  • 103081317
  • 103069698
  • 102843000
  • 103608999
  • 104247231
  • 106787527
  • 103812284
  • 103812282
  • 103929023
  • 103812285
  • 105281457
  • 105365153
  • 105391253
  • 106469961
  • 106505809
  • 106849546
  • 107240994
  • 108015967
  • 107689715
  • 107733184
  • European patent

    • 1844536
    • 2421127
    • 2793378
    • 2600509
    • 1983636
    • 2448094
    • 2651017
  • Korean patent

    • 1030482
    • 1044034
  • Canadian patent

    • 2940213