MANUFACTURING METHOD FOR MAGNETIC MOLDED BODY AND MANUFACTURING METHOD FOR ANISOTROPIC BOND MAGNET

To provide a manufacturing method for a magnetic molded body for use in manufacturing an anisotropic bond magnet excellent in residual magnetic flux density and mechanical strength.SOLUTION: A manufacturing method for a magnetic molded body 10 includes: a supply step for supplying, into a mold, a co...

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Bibliographic Details
Main Authors TAKEUCHI KAZUMASA, HIRANO ARISA, ITO TERUO
Format Patent
LanguageEnglish
Japanese
Published 08.07.2024
Subjects
BASIC ELECTRIC ELEMENTS
CASTING
ELECTRICITY
INDUCTANCES
MAGNETS
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
PERFORMING OPERATIONS
POWDER METALLURGY
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
TRANSPORTING
WORKING METALLIC POWDER
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Summary:To provide a manufacturing method for a magnetic molded body for use in manufacturing an anisotropic bond magnet excellent in residual magnetic flux density and mechanical strength.SOLUTION: A manufacturing method for a magnetic molded body 10 includes: a supply step for supplying, into a mold, a compound 2 containing magnet powder, a thermosetting resin, and wax 4; a molding step for compressing the compound 2 in the mold while applying a magnetic field H to the compound 2 in the mold heated at a molding temperature Tm, and thereby forming a molded body 2A from the compound and removing the wax 4 from the molded body 2A; a demagnetizing step for demagnetizing, after the molding step, the molded body 2A; and a thermosetting step for heating, after the demagnetizing step, the molded body 2A at a temperature equal to or higher than the thermosetting temperature of the thermosetting resin to obtain a magnetic molded body. The magnet powder includes a Sm-Fe-N-based permanent magnet. The molding temperature Tm is equal to or higher than the dropping point of the wax 4 and lower than the thermosetting temperature of the thermosetting resin.SELECTED DRAWING: Figure 1 【課題】残留磁束密度及び機械的強度に優れた異方性ボンド磁石の製造に用いる磁性成形体の製造方法を提供すること。【解決手段】磁性成形体１０の製造方法は、磁石粉末と熱硬化性樹脂とワックス４とを含むコンパウンド２を、型内に供給する供給工程と、成型温度Ｔｍで加熱された型内のコンパウンド２へ磁場Ｈを印加しながら、型内のコンパウンド２を圧縮することにより、コンパウンドから成形体２Ａを形成し、且つ成形体２Ａからワックス４を除去する成型工程と、成型工程後、成形体２Ａを脱磁する脱磁工程と、脱磁工程後、熱硬化性樹脂の熱硬化温度以上である温度で成形体２Ａを加熱することにより、磁性成形体を得る熱硬化工程と、を含む。磁石粉末は、Ｓｍ－Ｆｅ－Ｎ系永久磁石を含む。成型温度Ｔｍは、ワックス４の滴点以上であり、且つ熱硬化性樹脂の熱硬化温度未満である。【選択図】図１
Bibliography:Application Number: JP20230091870