Bonded Magnets: A Major Force for the 21 st Century

Intertech's Magnet and Magnetic Materials Division ClJ . ' . Presents its 5th International Bonded Magnet Conference ... D INTERTECH

Advanced Technologies, Market Trends and Customer Requirements for

March 27-29,2000

2000 Conference Highlights

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2 Pre-Conference Tutorials l . The Design and App/ication of Po/ymer Bonded Magnets Dr. Peter Campbell Director af Applied Technology Magnequench International, Ine.

2. Methods and Techn%gies for Magnetizing and Testing Po/ymer Bonded Magnets Dr. Allessandro Tassi, Director Laboratorio Elettrofisico SrI

Strategic, technical and commercial insight from 22 industry leaders

Conference Co-chairs

Wayne Goodwin Vice President Hoosier Magnetics Inc.

Dale Polk Vice President Kane Magnetics International

Keynote Presentation

" Permanent Magnets in the E-Biz.com new Miflennium " Port Wheeler Wheeler Associates

Holiday Inn Select Nashville, Tennessee

Attend this conference and receive a complete briefing on: tt

This conference provides an excellent opportunity to /earn about the trends in magnetic materia/s and manufacturer's deve/opments. A unique opportunity to meet

experts in the magnetics

" industry.

tt

Hasit Parikh. Sr. Design Engmeer Philips Technologies

An excellent chance

to meet the major

players in the exciting

and dynamic magnet

industry, to exchange

ideas and to reeva/uate

" the market. Jolin Ormerod, Vice Presiden!, Bonded

Magnets and Technology Group Arnold

l. How to profit from the info rmation revolution and new opportunities for bonded magnets in the E-Biz.eom millennium.

2. Where the market is headed and whether the bonded magnet i ndustry ean maintain its historie 15-25% annual growth rate o

3. How to benefit from advanees in " Lean Neo" and new hybrid materials.

4. A new, low eost route for the produetion of isotropie and anisotropie NdFeB powders.

5. How to take advantage of new opportunities in motor,

sensor, aetuator, biomedieal and other bonded magnet applieations .

6. Global soureing strategies for magnet powders, polymer eompounds, and bonded magnets to give your eompany an advantage .

..................................................................................... Corporate Sponsors

GROUP ARNOLD~ THE MAGNETIC MATERIALS GROUP o, SPS TECHNOLOGIES

VA~ IACUUMS(HIIElZE

Polyrner Bonded Magnets 2000 Mareh 27-29,2000 Nashville, Tennessee

Final Conference Agenda

MONDAY, MARCH 27 6:00 - 8:00 pm Registration and wine & eheese reeeption Sponsored by Vaeuumsehmelze

TUESDA Y, MARCH 28

7 :00-8:00 am Registration and Continental Breakfast

8:00 Welcome & Conference Overview Jonathan Olmstead, Conference Director - Interteeh Conferenees Wayne Goodwin, Conference Chair - Hoosier Magneties Ine. Dale Polk, Conference Chair - Kane Magneties International

8: 15 Keynote Address: Permanent Magnets in the E-Biz.com New Millennium Port Wheeler - Wheeler Associates

Session l-Bonded Magnet Market Dynamics for the 21st Century

8:45 -Dynamics of Bonded NdFeB Permanent Magnet Market Jake Ring - Magnequeneh International Ine.

9:15 Bonded Magnets: A Major Force for the 21st Century J ohn Ormerod - Group Arnold

9:45 Refreshment Break

10:15 Bonded Magnets - Out with the Old in with the New Michael Miller - Magnet Applieations

10:45 And the Questions Are? Robert Wolf - Data Decisions

11: 15 Global Sourcing of Bonded Magnets from Suppliers Ralph Gallup - Gallup & Assoeiates Ine.

11 :45 Roundtable Luneheon Sponsored by Group Arnold

Speaker 1

Speaker 2

Speaker 3

Speaker 4

Speaker 5

Speaker 6

Bonded Magnets: A Major Force for the 21 st Century

- presented by -

John Ormerod Vice PresidentlBonded Magnets and T echnology

Group Arnold 300 N West Street

Marengo IL 60152-2192 USA T el: 815-568-2301 • Fax: 815-568-2236 . Email: [email protected]

Polymer Bo"nded Magnets 2000

March 27-29, 2000 Holiday Inn Select Nashville, Tennessee

C#J INTERTECH

19 Northbrook Drive • Portland, Maine 04105· USA Tel: USA+(207) 781-9800 • Fax: USA+(207) 781-2150 Email: [email protected] • www.intertechusa.com

POLYMER BONDED MAGNETS 2000

Bonded Magnets: A Major Force for the 21 st Century

Presented by: Dr. John Ormerod

VP Bonded Magnets and Technology

Group Arnold

·GROUP ARNOLD


• Market opportunities: from advertising to zero PPM

• Process and products: current and future

• Success through customer and market dedication

• Future applications and solutions GROUP ARNOLD 2

Wide Spectrum of products and applications

I

~. GROUP ARNOLD 3

- Global Bonded Magnet Production (1999)

Flexible Molded Bonded Total Ferrite Ferrite Rare Earth $OOO's $OOO's $OOO's $OOO's

$50 $130 $210 $390

$105 $45 $40 $190

$15 $40 $50 $105

é~ $25 $45 $20 $90

Euro~ $10 $15 $15 $40

(jtJler . $10 $30 $20 $60

:rotÉ $215 $305 $355 $875 ",",.;",,,~-;:::;,;;.,,,~i:J.-.~,,, .. <.,

GROUP ARNOLD 4

Industry Dynamics • iltW4&wg Mi

• Industry ownership changes/ alliances/ consolidation

• Newentrants

• Impact of Internet revolution

• Key raw material issues

• New products and technologies

• Newapplications

GROUP ARlVOLD •• ~ 111"_. __ 111111111._ 5

Serving customers needs and expectations kf9%W'ifVbW4&WfW4M# W"#%W1&W;lW- EMaNo/a M FA H iMWM@f!W1

• Bonded magnet industry serves a wide spectrum of applications

• Require full range of process capabilities

• Formal quality systems a must

• Low cost, flexible manufacturing

• Full service technical support

• Innovative products and solutions

GROUPARNOLD ....................... 6

POLYMER BONDED MAGNETS 2000 *9ih& 'N-A" WF¿Wn:kJvW&MeM4iSiM'% kM 1 fWhMHim-NI1WMWPW'WitWÓW%PP'i.lV{,**W,,,@ ti




• Future applications and solutions GROUP ARIVOLD !'S ____ �'Bil""ll' ____ IDi·~ 7

Processing Capabilities: injection molding

CLAMPlNG

PAESSURE

~

MOLDEO PART

HEATlNCi

GROUP ARlVOLD 8

Processing Capabilities: extrusion

Processing Capabilities: calendering

GROUP ARNOLD 10

Processing Capabilities: compression molding QíMIt$<&itihiiifiU¡ii t ¡ru¡ii¡ iSU!3d?&tH #6&**$ "*8&#

PUNCH

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PRESSEO PART FROM POWDEA ANO EPOXY, REAQY TO BE CUREO

PRESSFRAME

GROUP ARNOLD ____ lB _____ ._ 11

Processes and Products: Current and future

• High strength injection molded

• High energy extruded ferrite

• Flexible injection molded

• Hybrids

• Bonded soft magnetic material s

• SrnFeN • Multi material injection molding

• Customized flexible binder systems

• Improved printability, Ink jet printable flexible sheets

• Etc . . ...... . . . . . . .. ....... . .. . . . ... . . .

High strength injection molding compound Ma &*'1%*%&- Mi.m i iR $ '

Tensile $trength

~ '2000 ,---------------_;

.; :0000 +----------"",..",""--' ~ soco +-----------~ 6000 +-~""'"'----• <000 +--""""""""----;¡~

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¡ ' +-----------~~ ___ ~ o,~ +-----.==--------, ~ O., +---..... ------: 0 , 4

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• Higher strength and elongation with an improvement in magnetics

• Useful for insert molding applications '

• Parts operating at high speeds

• Current applications include wheel sensors, brushless D.C rotors

GROUP ARNOLD 111111111111 ________ 13

High Energy Flexible Extruded Magnets

• Competitive price per performance • Therrnoplastic resin binder system • Electromagnetic field orientation • Can be made in thick (25 mm) cross

sections • Higher rigidity than CPE and EEA

binders • 1.4 - 2.4 MGOe

MM 5- 6

PAlCE VS. PERFORMANCE f'OR FLEXlBlE EXTRUDED MAGNETS

'";' 2.0 f---t---=::¡==::¡::=~ o

" ~ t; 1.5 f--f--f--f-....,....-:: ::>

" g ; LO f-r==:l-+---+----4<:+---+-----l e a:: w z u; O,S

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PA:CE (USOIlB.)

GROUP ARNOLD 111",11 .. ____ ••••• __ 14

Highly flexible injection molded magnets

Tensile elongation

25 ,---------

~20 +-1 ___ "'9lHigbll¡.1~ff JeIU.lJt.I.L' -~_, - I moldedllerrile g 15 +------r~--l ! 10 +-I----j ~ 5 +-1 --SIo __ ---j _ nylon6lferrile ~ c~==~~~-~~-

• Utilizes TPE binder systems

• Combines advantages of flexible material ·with process capabilities of injection molding

• Complex shapes and magnetic orientation possibilities

• Current applications include cylinder position sensors and bio-magnetic applications

GROUPARNOID ~~ _ _________ . 15

Hybrid bonded magnets 4%S4%MWWV&*kM'@*¿Qde¿KM}

A BONDED MAGNET

WITH TWO OR MORE

DISTlNCTLY DIFFERENT MAGNETlC MATERIALS

~ EMBEDDED IN A NON-MAGNETlC MATRIX

Typical properties of common permanent magnet materials Pi 44 #

1 S¡-----~----~_==========_~----~----1

, ~~~~~.~:NS •. ''''.-ALNICO ' Nd ¡:;~S • • . ._----- ~ ~~ ~ -

-~- ~- - - -, . ~ -

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íii' 10 en

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' SINTEAt=.O , ••••• NdF"S

O ~~~~~~~~~~~~~~~~~~~~~~~ O 5 10 15 20 25 30

Hci (kOe)

GROUP ARNOI..D __ -IIIIi!MNM ¡l. =e 17

Examples oi injection molded hybrids Mmu !!,p: Ql!1WHf%&i%A1M¡wrp¡M;m%1¡¡!idZM mpww uu 5 A-:.'g-.J:mMNM t aS-%%'- x ", g i

2401 = 20% MQP-Q. BO% Ferrite 2402=40% MQP-Q . 60% Ferrite 2403 = 60% MQP-Q. 40% Ferrlte - ::-- ff 2405'" 55% MQP-O. 45% Ferrite -V-- 2403 .... 2402- / :/' ./ ./ :::;-

2405 ~ ~ 2401 ....... ./ "/ /' ./

./ V /' ~/ / ~

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!l/ V V/ 5 ,000 4, 500 4,00 0 3,500 3,000 2,500 2,000 1,500 1,000 500 O

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2, 500 ~

2,000 c:

1,500 ce 1,000

500

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GROUP ARNOLD 1I1'lII'If144MWWW'I_ ..... 18

Examples of flexible hybrids

W~202= NdFeB 1401- Femte, NdFeB Hybrid 1060 - F elT1te --f---f-J

V- ¡....- V 1202""- /

/ /"

/' :/ t1:: L ;/1 1//

/ ,/ 1401 _! 1/ 1060

1/ /; V

/ V I~ IÍ '/ 13,000 12,000 11,000 10,000 9,000 8,000 7,000 6,000 5,000 4,000 3,000 2,0 00 1,000 o

H, in kOe

6,000

5,000

<,000 ., ., :::1 ..

3,000 (!) oS aí

2,000

1,000

o

GROUP ARNOLD ____________ 19




• Success through customer and market dedication .

• Future applications and solutions GROUP ARNOLD ~_~_511 _______ 20

Group Arnold Web site

grouparnold.com • WEBSITE LAUNCHED JANUARY 21,1999

• VISITORS FROM OVER 30 COUNTRIES

• SITE VISITS: 150,000 ANNUAL RATE

• OVER 3 MILLlON HITS PER YEAR

• AVERAGE SESSION TIME 8-10 MINUTES

• SOMEONE LOGS ON TO OUR WEBSITE EVERY 3 MINUTES

• "ARNOLD STORE" LAUNCHED IN DECEMBER - CREDIT CARD TRANSACTIONS - PHASE ONE OF E-COMMERCE INlTlATlVE

• POSTIONED AS THE INDUSTRY INTERNET PORTAL

G ROUP ARNOLD ~~ _ _ a . _______ 21

Group Arnold Web site

OUR WEB SITE OBJECTIVE

Achieve a Ieadership position In and make a contribution to the Magnetic Materials Indusby. Proyid. a comprehensiye, innoyati ve and dynamic website which serves aH

current and potentiaI stakeholders in our company.

Site contains over 400 externallinks to: Industry organizations Government organizations U ni versities Government Laboratories Industry news sources Industry Web sites

GROUPARNOLD B _ ________ ._ 22

Group Arnold Borne Page

GROUP ARNOLD"

... Walcome to th. worki o, magneUes:! Grovp Amoldo , one (l! lht ¡,!'!IU! magnf'lC ffltUn.aI m'I\IIÍ.CIUtr~ ". 11'1 • .....,rId. W , u ........ ."f1y of m.""", r!l(ludng: ~-'l iInd Pr_CII~I • ..t...I'!on'OI .... Com~UI .. Ilnd PftlP....,. lt. Con'um .. • *",d A.llpI • .nc., . Inclu~rt)j Pf'CIducll. ~1X1oI ,t,p~IIC ~IJon .. .... kl<1ot'J/.-.ro~~. R,provr~QhIC S)"ol~ . $10(,,1,,11 Syr.¡.mi . .nd T-'.cQtTItnI,nC~ lon~. W. can 1NI fJ! 10111 requ ... m.nI~ 101 Ioow 01 h'Uh \'01urrM produc! ,cn 01 .1<XiI Of cus:om m .... s .nd ""¡MIo' .... m DI .. , . Conta( ' ,OU- lonl OEM S , ln p.p'.em'Jl .... 01 tny r)( cur &11'0(1".4 QiSltb"!9! ' .

... lndustry News

• KlppppD.nkpf'R'o.

l'lIAI F,~tyZ8. 2000 Nippon [)enlo;o ... HbuiId I ntw pl""t.c .:s¡';ol""I',ku . .

• Trid· n·M'9R"Tnrb"P'PBY Hol lineljmj,.dA(.uj r.d FflWffly ZS, 2000 D.WN er CE af CtrmanJ *cquo,..cICOftlfolo( . ~ FoH';ruMy2J, 2COO UU _tk ,C",mu~nt1ICS

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Magnetics Technology Center MagnellCS

T&CMOIC>gfCenter Your Cefiniüve Saurce for In'ormarion About

The Magnetics Industry

W.k:ome to!tle Mao;t'lellCS TecMoJOC;V C&Tl&!'s&cuonof www_?,oupamOld.coml

~ Coal,s 10 prO"lice you witn COITl)I'ehanSlVEI ,rcormatlon aoout mél(7lets. IT'Iacnetlc tnalenas and de~ ol de~<;:eswn.:ch use magnets. Please"'ewour~~

I yQU 1'Iave" SPec,::JC cuescon loc ~Ctl you tamO( tilO an answ(tr, 8re havn!: problems locatlng spec,fíc ,rtormatl Ctl, or llave suwesnons ler tmorovement. please~

~"'1..~_' __ .,-~ . ~"..II~ ~,....

DataDas.

SH'C I'Il¡ .l.1!.1lU;;! o(lfI~""I.c"tol"o(!"'"1i¡r1 ~I'! tna 01 10100..--"10?1""" MeI ~'~k'QoOU/'CU

" APPlICATlONS .. PATENT INFORMATlON

~ DESIGN SOFTWARE

"EQUIPMENT 1""2'N~· IM.~

.. OFF·SrTE LINKS ~.~. ~.~

"'REFERENCE MATERIALS ~. Dst,':tl a ty gfllod -S1..!.lll:C

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.TRAININQ CLASSES p .. ""'''~ .'liM)lO.tl2~,,~lliill

• VlSIT"OlE CENTER ~~

""""""'" GROUP ARNOLD ~_B _____ !!II __ • 24

Patent Database I

GROUP ARNOLD MAQNETICS TECHNOLOGY CENTER Industrv Patents

",.,. __ ,._ ... ~ __ T_ Ma\lll!llll:

T",f'Coo!,",tJ\,- '-,,"Cff." o . ... . ..................... ~ JStI.W¡ .... ?"~ T'[ ~ · · ,. .... º ' Q?X r . .. ~ .. " ' :<c " ~I"xrolr'!J '

Ma<;lneDC motena! ano prOCOSSlng developmont 15 proceedu'Ig al e raOIC! pace oven mough (perneos tlecau50) a maJor .. ~. m."9I"1ODC mawn<!1 n~!. nOI t)..)(In :JnnOuncioC:: r" ( -Gney Inlormatlon on patf3nts IS O)ss~nDa! 10 unaersla-"Id' f"IJ:tIa curren: ~Ie 01 dav&lo"....me.nt

Why creat. thls databas.?: SeerChtn9 tor p8l:ems regflrd,ng megneoc m8tenels out 01 thil 2 m. lbon plus palEmu. In me U$PTO or IB M

. detabase-s 15 dll'flcult snd D~e consumlng . As a S6r'V1Ce to OLJ" ...,sltors. 'NO havo proparad 8 dataOase of maten al, proco)<;~ ~nCl4'lpphc aDon pt:)tvnt::: NIUtoCl on~ 10 [h(.o magn.tlc. Industry wrllcn muy b4.I <;.varc~ lT;o l~ d:~t (t. mven::or. aSSlgne~ Or ~ull tex: sean;r. Ct!ter'la .

What tt I"elud •• : US. pawnt'i tor ~rmooont cnO sort mtlgn<Jtlc mtlt ... n¡)IS. Pto(.OSSo)'i und QPphc;:rt)ons cOVl.)nng 1 ~70 to tn\"l pr \)s.-,.."t

~ AdCl~OM Pi:S!0I'ItS. "'41! t)o 000.,6 .x; ¡ !,;"\ey ':)N l -:~WC: <llne U~ <Nt ~1Y;."O!Ct'l 1.cae: pc.ru "uncoY'W:SM~

What it doesn't: CDver: Sup orCO/"lducnVlty and megnonc mln fl lm rocor(Mg medie are not lnclucad In the Oatabese

Other patent rererenees: F"ull copies ot U.S patents cnd peten: seerches are avalleble trom

• Th~ U .S Patent ano TrademaJ"l< Q1fIC9 . Wasnm,Jton. DC 20231 (.........w Y~P;i) .7"') 03:¡¡;S covered are 1'·.)7 6 to thiir eresent

• The 19M IntellectlJGll P rop(;rt'( OottlOOS('I ~~"'-~'~~~l OOIc>S covoroi!rC .,r~ 1972 to tho pr(l!.Mt Wltn sorne tnformanon on earl.er patents .

Industry web directory GROUP ARNOLD Web Directory

~ Tt':hndocy C~nt:A(

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S.lect nm lethr or company name : 61.a.1.c.IQlflfl5:1l:1I11JIISILI.b! J NI.QlelQ.J81.sIII!.!I~IYi.1~¡! I l. ·0I'· 6L.L

CATEGORJES Pf:U • • c~ 101.-,.11 ASSEwe. · W...;-..ot< ..... ~..,...e;_. _ c.. .. w. Iot>o/...c:",... '

OIST, " o..l lIbulOf SOFT .. ~"'hC,II)' SoA MII. .. nW$ MAns," R_ M~ .. ".,s - •• ,~ ",~oy $ ... m'. p~.r. rnoIall\ ;compOl.lna

'"BOLO 1!oI.1II'If'<' Ootnoh' ~ Gfoup Amold Ó>$lnbutor o, b..,..~"

A COMPAffYMAME

Adams Magnetlc Products ¡.sr.,,... ... ; fv':>q f\ó.i· .. rr. - ?r:?gt\1'i'n

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~1Qi!!Lc.~~!! AiI1s?C CO~n¡,,: tr'S(:!'M?9"\.1

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Industry Associations

~~!~-cOOlT""rGolt~ ..,.1tOI.D

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Llnks to Industry Assoclatlons wlth Actlvltles and Informatlon Related to Magnetlcs

riiJ (r ~7¡;;:;?

, APS : Amenccn P~IC81 Soc¡e¡y GMAG TODlcal Group on Maynetlsm

'.waIilP'Ql?!lJO,,-Jgm'Q

~ . ASM IntematlonaJ ~~ Formerty tM American SOClety lor Metels

;;;_",,>-,.::.-:- __ ;I-,-"""""=_~-,-- _I~l;:.' '=19 ___________ __________ _ _ _

¡ Edinburgh Engineering Virtual Library I U K . and EurOP(oBn En!)neenng Resources .. _. --....................................... .

¡ MOFA

GROUP ARNOLD PI-""!I' D~ _____ I!I_BlB'i, 27

University Links h%Wv. t ¿'NiFp · HA? HWhW4 , 'M'e l MhM'4W*M t d 'WM%' t *-&-tWFM'Yª4tik·,;a

Llnks to Universities with Programs in Magnetics

Unl .... rslty of Artzona

C.ralff School of Engln •• r1ng WOlt,;on C entre o' M~c:"o)t: (;!:O T ~~0I00;y

: ~Jnl V(,.r$¡~ 01 WaleS

Universlty ot CeJaware

Unlv erslty or Or •• den ;: Qf'Schun9sschwerpunkt., uno ~9ChOor¡ o., Pro;.~kte v . ~", ••• ""."" • • ", • • • • • • • o.. •• • •• •• • ' ... _ ••••• ,. ..... .. ....

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Industry News Fe bnJa ry 1 1.2000

JAPAN BONDEO MAGNET OUTPlJT

The ASSOcletlon 01 Bondea M.,gner Il'ICIustn&s-Japan expects [0t31 Jaoenese output 01 BonCled m~nl?ts lor 1999 Wlll lall 5% !rom 1998 to ),f, 43 9 Olnlon

Rare earth bonded magnet OutDut r05e on exPended pe C1emaM. but ngld bondad magna! produc~on leH aramatlcalt-y elue tO Slu991Sh demand In orhce automatJon products such es COPlers

The year 2000 aopears bngrner' outoul is forocas! to be),f, 46 billion

} 999 SONDEO MAGNET PROQUCTlON -%'c;:w:..éE···¡

PROOUCT 1~-:o~OOfl : .. _., ."~ ... . ~----... ~-_.

) ¡

.," !

Rerum to I 9.2. ~ Poge ................. -.. -_ ....

Febl'\.l ary 9, 2000

EEC INTRODUCES NEW PROOUCTS

TM Electron Energ( CorporaDon 01 LandlSVIlle. PA has announceCl two !amlllos 01 ne..... proaucts

The Ilrst 15 a tarTII~ O! hl<;lh ¡emperature SmCo matenals wtucn m~ be usad to 550·C

EEC elso ennounceC! tI'le start 01 prOOUCDon 01 porymecr DOfl(leo rare eartr'l IT\8gnets

General Spoic¡:,\caDons lor Dotn malenals are ava lable on!tlE' ~

Retum !0 !.Qe. 01 P::Jge

. "

GROUP ARNOLD _e ________ ._ 29





• Future applications and solutions GROUP ARN OLD Il¡q¡¡¡E" E· i;!j~IBE:iJj. __ Bi._ 30

Future applications, solutions and issues ddhd;'iU$:"-QZ,,·tt'''', \41*/ %; -;e (1 m : : Pi H&li#bhkf;' dM,,ª ;:: t -aSe' MkiMj;¡¿

• Biomagnetic - Patent issues

• Intelligent highway

• Automotive

• Bonded soft magnetics

• Altemative RE powders

• Bonded magnetic retum paths

GROUP ARNOLD _g~_B _______ 31

Conclusion 4WVi;;qAwWi AA 9hlf{-fA ,{«tbMWBt-@'N-@tMtMjf-*&*&&*f5Mm#*j,!W%*itl f§ij i tN&*MbJiiW)@

Bonded magnets will experience the highest growth rate of any c1ass of permanent magnetic material over the next 5 to 10 years.

W orld Class bonded magnet suppliers need to provide complete product range, innovative solutions and extensive global technical support.

GROU P ARN O LD _m~ _________ 32

POL YMER BONDED MAGNETS 2000

Or. Ormerod completed his post graduate thesis at the University of Manchester, U.K. in 1978 on matters totally unrelated to magnetics. However, his business career has been spent in the magnetics industry. Half of it, to date, he spent in various positions with Philips in the U.K. and the Netherlands. The other half has been spent with Group Arnold in the U.S. His current responsibilities include all bonded magnet activities and group-wide technology fer Group Amold.

Bonded Magnets: A Major Force for the 21 st Century

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Transcript of Bonded Magnets: A Major Force for the 21 st Century