KR0164995B1 - 본드자석의 제조방법 - Google Patents

본드자석의 제조방법 Download PDF

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KR0164995B1
KR0164995B1 KR1019950056815A KR19950056815A KR0164995B1 KR 0164995 B1 KR0164995 B1 KR 0164995B1 KR 1019950056815 A KR1019950056815 A KR 1019950056815A KR 19950056815 A KR19950056815 A KR 19950056815A KR 0164995 B1 KR0164995 B1 KR 0164995B1
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powder
mixing
binder
bonded magnet
hours
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KR1019950056815A
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KR970051497A (ko
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정태승
권문
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정몽원
만도기계주식회사
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/0533—Alloys characterised by their composition containing rare earth metals in a bonding agent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
    • H01F1/0558—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together bonded together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
    • H01F1/0578—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together bonded together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/42—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of organic or organo-metallic materials, e.g. graphene
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/44—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
    • H01F1/445—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids the magnetic component being a compound, e.g. Fe3O4

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

본 발명은 본드자석의 제조방법에 관한 것으로, Nd-Fe-B계 또는 Sm-Co의 자성분말을 파우더형 바인더와 1시간 이내로 믹싱을 하여 혼합하는 공정과, 상기 혼합된 혼합물을 ㎠당 5∼10ton의 수직 압력으로 성형하는 공정과, 상기 성형된 성형물을 1∼6시간 동안 100∼150℃로 경화 시키는 공정으로 제조되는 것이다.

Description

본드자석의 제조방법
본 발명은 본드자석의 제조방법에 관한 것으로, 특히 종래의 액상바인더 대신 파우더형 바인더를 사용하여 공정의 간편성과 제조단가를 줄일 수 있도록 한 것이다.
종래의 본드자석 제조방법은 엑상바인더(binder)를 희석제와 혼합하고, 이를 자성분말과 섞은 후 상기 희석제를 휘발시켜 건조시킨다.
그리고 휘발된 상기 혼합물을 경화시켜 본드자석을 제조하였다.
그러나 상기의 본드자석 제조방법은 엑상바인더의 희석제와 혼합하고, 이를 다시 휘발시켜야 하기 때문에 공정이 복잡하고 난해하였으며, 또한 액상바인더의 점도 및 건조시간의 콘트롤(contol)이 어렵고, 희석제의 휘발에 따른 시간적인 소모와 산화의 가능성이 있는 문제점이 있었던 것이다.
따라서 본 발명은 상기와 같은 제반문제점을 감안하여 이를 해소하고자 발명한 것으로, 파우더형 바인더를 사용하여 제조시간 단축과 제조단가를 줄일 수 있도록 하는데 그 목적이 있다.
이와 같은 목적을 갖는 본 발명은,
먼저 자성분말과 파우더형 바인더를 기계적인 방법으로 혼합하여, 압축성형한 후 이를 경화시켜 본드자석을 제조함을 특징으로 한다.
또한 상기 방법에 있어서 자성분말이, 급냉응고된 Nd-Fe-B계열의 자성분말 이거나, 또한 Sm-Co계 자성분말이고, 바인더는 파우더형의 에폭시 수지인 본드자석을 제조하는 것을 특징으로 하며,
상기 방법에 있어서, 바인더의 함량이 5wt% 이하이고, 기계적인 혼합 이외의 다른 처리를 행하지 않고 ㎠당 2∼10ton이 수직압력으로 성형하고, 100∼150℃의 온도에서 경화시켜 본드자석을 제조하는 방법을 특징으로 한다.
상기와 같은 특징을 갖는 본 발명의 제조공정을 상세히 설명하면 다음과 같다.
본 발명은 자석분말과 파우더형 바인더를 혼합하여 긴밀히 믹싱을 하고, 이 믹싱된 혼합물을 소정의 형상으로 성현한 다음 경화시켜 최종적으로 본드자석을 제조한다.
이와 같은 본 발명을 더욱 상세히 설명한다.
본 발명은 먼저 희토류계 자석분말 즉 Nd-Fe-B계 또는 Sm-Co계에 파우더형의 유기바인더를 1∼5wt% 첨가하여 기계적인 방법으로 1시간 이내가 되도록 믹싱을 한 후 긴밀히 혼합을 시킨다.
이와같이 하여 혼합이 완료되면 이 혼합물을 ㎠당 2∼10ton의 수직압력으로 압력을 가하여 성형을 한다음 100∼150℃에서 1∼6시간 동안 경화시켜 본드자석을 제조한다.
상기와 같이 제조된 본 발명을 실시예를 통하여 설명하면 다음과 같다.
[실시예]
Nd-Fe-B계 자석분말을 급냉 응고시키고 파우더에 페놀(phenol) 계통의 에폭시파우더(eopoxyo powder)를 2wt% 첨가하여 30분동안 세이커 믹서(shaker mixer)에서 혼합한 다음 6ton/㎠의 수직압력으로 성형한다.
그리고 120℃에서 2시간동안, 150℃에서 2시간동안 경화시켜 본드자석을 제조한 결과 하기 표 1과 같은 결과를 얻었다.
이상과 같은 본 발명은 지성분말과 파우더형바인더를 단순 혼합하여 본드자석을 제조하기 때문에 공정이 단순해서 공정관리가 간편하고 제조시간이 적게 걸리며 제조단가 또한 절약되는 효과를 얻게 된 발명인 것이다.

Claims (3)

  1. Nd-Fe-B계의 자성분말을 파우더형 바인더와 1시간 이내로 믹싱하여 혼합하는 공정과, 상기 혼합된 혼합물을 ㎠당 5∼10ton의 수직 압력으로 압축 성형하는 공정과, 상기 성형된 성형물을 1∼6시간 동안 100∼150℃로 경화시키는 공정으로 제조되는 것을 특징으로 하는 본드자석 제조방법.
  2. 제1항에 있어서, 바인더는 파우더형의 에폭시수지이고, 바인더의 함량은 5wt%이하인 것을 특징으로 하는 본드자석의 제조방법.
  3. Sm-Co계 자성분말을 파우더형 바인더와 1시간 이내로 믹싱하여 혼합하는 공정과, 상기 혼합된 혼합물을 ㎠당 2∼10ton의 수직 압력으로 압축성형하는 공정과, 상기 성형된 성형물을 1∼6시간 동안 100∼150℃로 경화시키는 공정으로 제조되는 것을 특징으로 하는 본드자석의 제조방법.
KR1019950056815A 1995-12-26 1995-12-26 본드자석의 제조방법 KR0164995B1 (ko)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101430543B1 (ko) * 2010-09-23 2014-08-14 다이슨 테크놀러지 리미티드 보강된 자석

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100868066B1 (ko) * 2006-09-29 2008-11-13 서울시립대학교 산학협력단 알니코계 복합자석용 조성물, 알니코계 복합자석과 그제조방법, 및 이를 이용한 이종접합형 알니코계 복합자석

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101430543B1 (ko) * 2010-09-23 2014-08-14 다이슨 테크놀러지 리미티드 보강된 자석

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