公开(公告)号：US20140043125A1

公开(公告)日：2014-02-13

申请号：US13960475

申请日：2013-08-06

Applicant: Minebea Co., Ltd.

Inventor： Fumitoshi YAMASHITA ,  Toshinori SUZUKI ,  Haruhiro KOMURA

IPC: H01F41/02

CPC classification number: H01F41/0266 ,  C22C38/005 ,  H01F1/0578 ,  H01F1/0579 ,  H01F1/059

Abstract: Provided is a method for producing a fully dense rare earth-iron-based bonded magnet, the method comprising: kneading a non-tacky thermosetting resin composition with rare earth-iron-based magnet flakes to produce a solid granular composite magnetic material; filling the granular composite magnetic material into a cavity, applying a uniaxial pressure higher than or equal to the yield stress of the thermosetting resin composition to the granular composite magnetic material so as to produce a green compact in which voids are reduced as a result of an interaction between brittle fracture of the magnet flakes and plastic deformation of the thermosetting resin composition, the rare earth-iron-based magnet flakes are piled on top of one another highly compact in the direction of the pressure axis, and the mutual positional relations of the magnet flakes are set almost regularly; and heating the green compact to cure the thermosetting resin composition constituting the green compact.

Abstract translation: 提供一种制造完全致密的稀土 - 铁基粘结磁体的方法，所述方法包括：将非粘性热固性树脂组合物与稀土 - 铁基磁体薄片捏合以制备固体颗粒状复合磁性材料; 将颗粒状复合磁性材料填充到空腔中，将高于或等于热固性树脂组合物的屈服应力的单轴压力施加到颗粒状复合磁性材料上，以便产生其中空隙由于 磁铁薄片的脆性断裂与热固性树脂组合物的塑性变形之间的相互作用，稀土 - 铁基磁体薄片堆叠在压力轴线方向彼此高度紧密的顶部，并且相互位置关系 磁铁片几乎定期设置; 并加热生坯以固化构成生坯的热固性树脂组合物。

公开(公告)号：US20130192723A1

公开(公告)日：2013-08-01

申请号：US13718590

申请日：2012-12-18

Applicant: MINEBEA CO., LTD.

Inventor： Haruhiro KOMURA ,  Noboru MENJO ,  Toshinori SUZUKI

IPC: H01F41/02

CPC classification number: H01F41/028 ,  H01F13/003

Abstract: A method for manufacturing a magnetized bonded magnet, including the steps of: arranging a magnetization permanent magnet for magnetizing a magnetic field near a non-magnetized bonded magnet; heating the non-magnetized bonded magnet to a temperature of a Curie point thereof or higher; and continuously magnetizing the magnetic field to the non-magnetized bonded magnet by the magnetization permanent magnet for magnetizing the magnetic field while cooling the non-magnetized bonded magnet reached at the temperature of the Curie point thereof or higher to a temperature of less than the Curie point, wherein the non-magnetized bonded magnet is a rare-earth iron bonded magnet including two or more different rare-earth elements in magnet powder thereof.

Abstract translation: 一种磁化粘结磁体的制造方法，包括以下步骤：设置磁化永磁体，用于磁化非磁化粘结磁体附近的磁场; 将未磁化粘结磁体加热至居里点以上的温度; 并且通过用于磁化磁场的磁化永磁体将磁场持续磁化到非磁化粘结磁体，同时将居里点以上温度达到的未磁化粘结磁体冷却到低于居里 其特征在于，所述非磁化粘结磁体是包含两种或更多种不同稀土元素的稀土铁粘结磁体。