公开(公告)号：WO1998003981A1

公开(公告)日：1998-01-29

申请号：PCT/JP1997002080

申请日：1997-06-17

Applicant: SEIKO EPSON CORPORATION ,  AKIOKA, Koji ,  SHIRAI, Hayato ,  IKUMA, Ken

Inventor： SEIKO EPSON CORPORATION

IPC: H01F41/02

CPC classification number: B22F3/227 ,  B22F3/20 ,  B22F2998/00 ,  C22C1/0441 ,  H01F1/0558 ,  H01F1/0578 ,  H01F1/059 ,  H01F41/0253 ,  H01F41/0266 ,  Y10S264/58 ,  Y10S428/90 ,  Y10T428/1355 ,  B22F3/22 ,  C22C32/0094

Abstract: In this method of manufacturing bonded magnets of a rare earth metal, a compound (10) obtained by pelletizing a kneaded product of a composition for the production of bonded magnets of a rare earth metal which contains powder of magnet of a rare earth metal, a binding resin and an oxidation inhibitor is stored in a hopper (91), and it is fed into a cylinder (3) through a feed pipe (92). When a piston (81) is extended by an operation of a hydraulic cylinder (8) and moved down, the compound (10) fed into the cylinder (3) is compressed, and sent gradually downward in the cylinder (3). The cylinder (3) and a heating member (41) are heated by a heater (5), and the compound (10) passing through these parts is heated to turn into a molten product (11). This molten product (11) is extruded from a metal extrusion mold (4) continuously in the perpendicularly downward direction, and cooled and solidified when it passes through a free end portion (43), to obtain a molded body (12) of a bonded magnet of a rare earth metal. Thus, a bonded magnet of a rare earth metal having excellent moldability, magnetic characteristics and dimensional accuracy is obtained by usinga smaller amount of binding resin with the advantages of extrusion molding enjoyed.

Abstract translation: 在这种制造稀土金属的粘结磁体的方法中，通过将含有稀土金属的磁铁粉末的稀土金属的粘结磁体的制造用组合物的混炼物造粒而得到的化合物（10） 粘合树脂和氧化抑制剂储存在料斗（91）中，并通过进料管（92）进料到气缸（3）中。 当通过液压缸（8）的操作使活塞（81）伸长并向下移动时，供给到气缸（3）中的化合物（10）被压缩，并在气缸（3）中逐渐向下发送。 气缸（3）和加热构件（41）由加热器（5）加热，通过这些部件的化合物（10）被加热成为熔融物（11）。 该熔融制品（11）从金属挤出模具（4）沿垂直向下的方向连续地挤出，并且当其通过自由端部（43）时被冷却和固化，以获得粘合的成型体（12） 稀土金属的磁铁。 因此，通过使用较少量的粘合树脂，具有优异的成型性，磁特性和尺寸精度的稀土金属的粘结磁体，具有挤出成型的优点。

公开(公告)号：WO1997035331A1

公开(公告)日：1997-09-25

申请号：PCT/JP1997000884

申请日：1997-03-18

Applicant: SEIKO EPSON CORPORATION ,  IKUMA, Ken ,  SHINOHARA, Takatomo ,  SHIOHARA, Kiyoshi

Inventor： SEIKO EPSON CORPORATION

IPC: H01F41/02

CPC classification number: B82Y25/00 ,  H01F1/0558 ,  H01F1/0578 ,  H01F1/0579 ,  H01F1/059 ,  Y10S977/777

Abstract: A process for producing a rare earth bond magnet comprising the steps of first mixing rare earth magnetic powder, a binding resin and an anti-oxidant at a predetermined ratio, kneading the mixture at a temperature higher than a thermal deformation temperature of the binding resin, granulating or classifying the kneadate to a mean particle diameter of, e.g., about 0.01 to 2 mm, press-molding the resulting granular material at a first temperature at which the binding resin is softened or molten, and cooling the resulting molded article under a pressure to a second temperature lower than at least the first temperature. Consequently, a rare earth bond magnet having a low porosity, high dimensional accuracy and excellent magnetic characteristics can be obtained.

Abstract translation: 一种制造稀土粘结磁体的方法，包括以下步骤：首先以预定比例混合稀土磁性粉末，粘合树脂和抗氧化剂，在高于粘合树脂的热变形温度的温度下捏合该混合物， 将捏合物成粒或分级至例如约0.01至2mm的平均粒径，在粘合树脂软化或熔融的第一温度下对所得颗粒材料进行加压成型，并在压力下冷却所得模塑制品 至少低于第一温度的第二温度。 因此，可以获得具有低孔隙率，高尺寸精度和优异磁特性的稀土键合磁体。

公开(公告)号：WO1993023858A1

公开(公告)日：1993-11-25

申请号：PCT/JP1993000611

申请日：1993-05-11

Applicant: SEIKO EPSON CORPORATION ,  IKUMA, Ken ,  ISHIBASHI, Toshiyuki ,  AKIOKA, Koji

Inventor： SEIKO EPSON CORPORATION

IPC: H01F01/08

CPC classification number: B22F1/0059 ,  H01F1/0533 ,  H01F1/0558 ,  H01F1/0578 ,  H01F1/083 ,  H01F41/0253 ,  H01F41/0266 ,  Y10S264/61 ,  Y10T29/49075

Abstract: A composition for a rare earth bond magnet consists of rare earth magnet powder and resin ingredient, and a magnet whose moldability, performance and corrosion-resistance are improved by adding chelating agent alone or chelating agent and antioxidant to the composition. By controlling the values of the material properties of the composition, troubles when molding the magnet can be suppressed, and the productivity of the magnet can be improved. With respect to a composition for extrusion molding, by using at least two kinds of resin, the moldability can be improved and the amount of production can be increased. Further, by using extrusion molding through cooling and setting and using hot compression molding as the manufacturing method of the magnet, the magnet is endowed with a high density and a high performance.

Abstract translation: 稀土粘结磁体用组合物由稀土类磁体粉末和树脂成分组成，通过向组合物中单独添加螯合剂或螯合剂和抗氧化剂，可提高其成型性，性能和耐腐蚀性的磁体。 通过控制组合物的材料性质的值，可以抑制成型磁体时的麻烦，并且可以提高磁体的生产率。 关于挤出成型用组合物，通过使用至少两种树脂，可以提高成型性，能够提高生产量。 此外，通过使用通过冷却和凝固并使用热压缩成型的挤出成型作为磁体的制造方法，磁体具有高密度和高性能。