DE559945C - Process for the production of mass cores from hard iron powder by impregnating iron powder with an organic insulating agent using a solvent or swelling agent for the latter - Google Patents

Process for the production of mass cores from hard iron powder by impregnating iron powder with an organic insulating agent using a solvent or swelling agent for the latter

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Publication number
DE559945C
DE559945C DEI41235D DEI0041235D DE559945C DE 559945 C DE559945 C DE 559945C DE I41235 D DEI41235 D DE I41235D DE I0041235 D DEI0041235 D DE I0041235D DE 559945 C DE559945 C DE 559945C
Authority
DE
Germany
Prior art keywords
iron powder
solvent
agent
mass
organic insulating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEI41235D
Other languages
German (de)
Inventor
Dr Friedrich Bergmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI41235D priority Critical patent/DE559945C/en
Priority to FR734687D priority patent/FR734687A/en
Application granted granted Critical
Publication of DE559945C publication Critical patent/DE559945C/en
Expired legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/20Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/22Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
    • H01F1/24Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated
    • H01F1/26Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated by macromolecular organic substances

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Soft Magnetic Materials (AREA)

Description

Verfahren zur Herstellung von Massekernen aus hartem Eisenpulver durch Imprägnieren von Eisenpulver mit einem organischen Isolationsmittel unter Anwendung eines Lösungs-oder Quellungsmittels für das letztere Bekanntlich lassen sich Massekerne aus einem magnetischen Material herstellen, indem man dieses in fein verteilter Form mit einem Isolationsmittel unter Zusatz eines Lösungs- oder Quellungsmittels für das letztere sehr innig vermischt und die Mischung in die gewünschte Form preßt, nachdem man das Lösungsmittel wieder ausgetrieben hat. Es ist ferner bekannt, daß die Verwendung von hartem magnetischem Material für die Erzeugung von Massekernen mit niedriger Hystereseverlusten und großer magnetischer Stabilität sehr vorteilhaft ist; anderseits hat die Verwendung von hartem Material den großen Nachteil, daß man zur Erreichung einer ausreichenden Dichte und Permeabilität der Kerne sehr hohe Preßdrucke benötigt, wobei man trotzdem nur Kerne mit unbefriedigender mechanischer Festigkeit erhält. Den letzteren Nachteil hat man dadurch zu beseitigen versucht, daß man dem harten magnetischen Material geringe Mengen weiches magnetisches Material zusetzte.Process for the production of mass cores from hard iron powder Impregnating iron powder with an organic insulating agent using a solvent or swelling agent for the latter is known to be mass cores Manufacture of a magnetic material by dividing it into finely divided Form with an isolating agent with the addition of a solvent or swelling agent for the latter mixed very intimately and the mixture pressed into the desired shape, after the solvent has been driven off again. It is also known that the use of hard magnetic material for the creation of mass cores very advantageous with low hysteresis losses and high magnetic stability is; on the other hand, the use of hard material has the great disadvantage that to achieve a sufficient density and permeability of the cores very high Press prints required, whereby one still only cores with unsatisfactory mechanical Maintains strength. Attempts have been made to eliminate the latter disadvantage by that small amounts of soft magnetic material are added to the hard magnetic material added.

Es wurde nun gefunden, daß man auch aus hartem Material unter Verwendung organischer Isolationsmittel Kerne mit großer mechanischer Festigkeit, hoher Dichte und__Permeabilität erhalten "kann, ohne däß die übrigen guten magnetischen Eigenschaften verschlechtert werden, wenn man die Formung der Masse in Gegenwart geringer Mengen des Lösungs- bzw. Quellungsmittels bewirkt und dieses erst aus dem gepreßten Körper entfernt. Die Erfindung betrifft somit ein Verfahren zur Herstellung von Massekernen aus hartem Eisenpulver durch Imprägnieren von Eisenpulver mit einem Isolationsmittel unter Anwendung eines Lösungs- oder Quellungsmittels für das letztere und besteht darin, daß auch die durch Pressen erfolgende Formung der Masse in Gegenwart geringer Mengen eines Lösungs- bzw. Quellungsmittels vorgenommen wird. Man arbeitet beispielsweise derart, daß man das beim Imprägnieren des @' magnetischen Materials verwendete Lösungs- i mittel vor dem. Pre@#e@,..xl ht vQUs_t ndigeent- i fernt oder daß man das fertig_imprä ni@rte,i vom@ös`ürigsmittel- befreite- magnetische Material durch Zusatz einer geringen. -rvMenge des @osungsm@.tfe%s, vorteilhaft ö,5 bis, i,5...Gewichtsprözent, bezogen auf die gesamte Masse, wieder änfäucKtet, dann durch Pressen formt,; und aäs noch -Vorhandene Lösungsmittel äusk# dem-`7orriistuck@- verdampft. An Stelle des, -beim Imprägnieren benutzten Lösungsmittels,; kann man der Masse auch irgendein anderes Lösungsmittel oder Quellungsmittel vor dem Pressen zumischen; @es sind z. B. geeignet Aceton, Alkohol. Als Isolationsmittel kommen in Betracht Schellack, Harnstoff-Formaldehyd-Kondensationsprodukt, Phenol-Formaldehyd-Kondensationsprodukt oder andere.It has now been found that cores with great mechanical strength, high density and permeability can also be obtained from hard material using organic insulating agents, without the other good magnetic properties being impaired if the molding of the mass is carried out in the presence of small amounts of the solution - or swelling agent and this only removed from the pressed body. The invention thus relates to a method for producing mass cores from hard iron powder by impregnating iron powder with an insulating agent using a solvent or swelling agent for the latter and consists in that also the development by pressing shaping the mass is performed in the presence of small amounts of a solvent or swelling agent. for example, it operates such that when the impregnation of the @ 'magnetic material used solvent medium before the i. e @ @ # Pre ,. .xl h t vQUs_t ndigeent- i removed or that one the finished_imprä ni @ rte, i from @ ös`ürigsmittel- freed- magnetic material by adding a small amount. -rvMenge it osungsm d @ @ .tfe% s, ö advantageous to 5, i, 5 ... Gewichtsprözent, based on the total mass änfäucKtet again, then formed by pressing ,; and any solvents still present are evaporated. Instead of the solvent used in the impregnation; you can also mix any other solvent or swelling agent into the mass before pressing; @es are z. B. suitable acetone, alcohol. Shellac, urea-formaldehyde condensation product, phenol-formaldehyde condensation product or others can be used as insulating agents.

Man verwendet vorteilhaft Eisenpulver, das aus Eisencarbonyl erhalten und nicht nachbehandelt wurde.It is advantageous to use iron powder obtained from iron carbonyl and has not been post-treated.

Beispiel i In einer Knetmaschine fügt man zu i kg eines durch thermische Zersetzung von Eisencarbonyl erhaltenen Eisenpulvers 309 eines Harnstoff-Formaldehyd-Kondensationsprodukts und etwa i oo ccm Aceton und treib - nach innigem D_ uxchmischen das Aceton durch Erhitzen üriter weiterem Kme_ten @b_ is ^äü@@@eriem fest von -"i- Gewichtsprozent d_er Gesämtmässie a_b#.# 1VIän kann- auch das#Ä.ceföri Völlstäüd#g abtreiben und das fertig imprägnierte, also von dem Lösungsmittel befreite Eisenpulver mit etwas A_ cetonwie__de_r _anfeuchten. Die wird -dann in -einer JR_ingform mit einem Druck von etwa i9 oookg/cm2 zu Ringen gepreßt. Die Ringe werden einige Stunden lang auf etwa 8o° erhitzt, um den Rest des Lösungsmittels auszutreiben. Ein aus derartigen Ringen zusammengesetzter, mit einer Bewicklung versehener Kern zeigt die im folgenden unter i angegebenen Eigenschaften: (I,, - Anfangspermeabilität; H - Henry; w - Wirbelstrom; h - Hysterese) Verlustzahlen, S ezif. bezogen auf i H, Zerreiß- Gewicht l'O i Amperewindung/cm festigkeit 5000 in 1ig/cm2 w h 1) 5,49 20,0 0,7 I 8 10,9 2) 5,37 17,3 017 f 7 o,6 In der zweiten Zeile sind im Vergleich die Eigensc ten e es Kernes angegeben, der in der üblichen Weisse unter vollständigem Verdampfen des Lösungsmittels vor dem Prssen, jedoch unter sonst gleichen Bedingungen hergestellt wurde. Be%spiel2 In der im Beispiel i angegebenen Weise wird i kg des gleichen Eisenpulvers unter Verwendung von 3o g Schellack und ioo bis 150 ccm Alkohol imprägniert und der Alkohol bis auf einen Rest von etwa o, 5% ausgetrieben. Ein aus der Masse mit einem Druck von etwa i9 oookg/cm2 hergestellter, durch nachträgliches Erhitzen von dem Lösungsmittel vollends befreiter Kern besitzt folgende Eigenschaften: Verlustzahlen, S ezif bezogen auf i H, Zerrelß- G ficht ß° i Amperewindung/cm Festigkeit co - 5000 in kg/cm2 w h 1) 5,51 9-0,6 0,7 7 9,I 2) 5,41 I9@I 0,7 8 2,7 In der zweiten Zeile sind wiederum zum Vergleich die Eigenschaften eines Kernes angeführt, der in der üblichen Weise unter vollständigem Verdampfen des Lösungsmittels vor dem Pressen, jedoch unter sonst gleichen Bedingungen hergestellt wurde.EXAMPLE i In a kneading machine, one adds to i kg of iron powder 309 of a urea-formaldehyde condensation product, obtained by thermal decomposition of iron carbonyl, and about 100 cc of acetone and, after thorough mixing, the acetone is added by heating it further @@@ eriem firmly from - "i- percent by weight of the total a_b #. # 1VIän can- also abort the # Ä.ceföri Völlstäüd # g and moisten the finished impregnated iron powder, freed from the solvent, with a little acetonwie__de_r. then pressed into rings in a JR ring at a pressure of about 19,000 g / cm2. The rings are heated to about 80 ° for a few hours in order to drive off the remainder of the solvent in the following under i specified properties: (I ,, - initial permeability; H - Henry; w - eddy current; h - hysteresis) Loss numbers, S ezif. related to i H, tear Weight l'O i ampere-turn / cm of strength 5000 in 1ig / cm2 wh 1) 5.49 2 0.0 0.7 I 8 1 0.9 2) 5.37 17.3 017 f 7 o, 6 In the second line, the properties of the core are given in comparison, which was produced in the usual white with complete evaporation of the solvent before the pressing, but under otherwise identical conditions. Be% spiel2 In the manner given in Example i, 1 kg of the same iron powder is impregnated using 30 g shellac and 100 to 150 cc of alcohol and the alcohol is expelled to a residue of about 0.5%. A core produced from the mass at a pressure of around 19,000 g / cm2 and completely freed from the solvent by subsequent heating has the following properties: Loss numbers, S ezif related to i H, Zerrelß- G ficht ß ° i ampere turn / cm strength co - 5000 in kg / cm2 w h 1) 5.51 9 0 6 0.7 7 9, I 2) 5.41 I9 @ I 0.7 8 2.7 In the second line, the properties of a core are again given for comparison, which was produced in the usual way with complete evaporation of the solvent before pressing, but under otherwise identical conditions.

Das vorliegende Verfahren gestattet somit, auf einfache Weise auch aus hartem Eisenpulver, das besonders wertvolle magnetische Eigenschaften besitzt, Massetkerne mit der für die Praxis erforderlichen mechanischen, Festigkeit zu erzeugen.The present method thus also allows in a simple manner made of hard iron powder, which has particularly valuable magnetic properties, To produce masset cores with the mechanical strength required in practice.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Massekernen aus hartem Eisenpulver durch Imprägnieren von Eisenpulver mit einem organischen Isolationsmittel unter Anwendung eines Lösungs- oder Quellungsmittels für das letztere, dadurch gekennzeichnet, daß auch die durch Pressen erfolgende Formung der Masse in Gegenware geringer Mengen eines Lösungs- bzw. Quellungsmittels vorgenommen wird.PATENT CLAIM: Process for the production of mass cores from hard Iron powder by impregnating iron powder with an organic insulating agent using a solvent or swelling agent for the latter, characterized in, that also the shaping of the mass, which takes place by pressing, in counterware of small quantities a solvent or swelling agent is made.
DEI41235D 1931-04-11 1931-04-11 Process for the production of mass cores from hard iron powder by impregnating iron powder with an organic insulating agent using a solvent or swelling agent for the latter Expired DE559945C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DEI41235D DE559945C (en) 1931-04-11 1931-04-11 Process for the production of mass cores from hard iron powder by impregnating iron powder with an organic insulating agent using a solvent or swelling agent for the latter
FR734687D FR734687A (en) 1931-04-11 1932-04-06 Manufacturing process of magnetic cores

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI41235D DE559945C (en) 1931-04-11 1931-04-11 Process for the production of mass cores from hard iron powder by impregnating iron powder with an organic insulating agent using a solvent or swelling agent for the latter

Publications (1)

Publication Number Publication Date
DE559945C true DE559945C (en) 1932-09-30

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Application Number Title Priority Date Filing Date
DEI41235D Expired DE559945C (en) 1931-04-11 1931-04-11 Process for the production of mass cores from hard iron powder by impregnating iron powder with an organic insulating agent using a solvent or swelling agent for the latter

Country Status (2)

Country Link
DE (1) DE559945C (en)
FR (1) FR734687A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971698C (en) * 1933-12-05 1959-03-12 Bosch Gmbh Robert Process for the production of a magnetic body for high frequency coils made of finely divided magnetic particles and an insulating material
DE972150C (en) * 1937-06-27 1959-05-27 Siemens Ag Process for the production of ferromagnetic molded bodies

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971698C (en) * 1933-12-05 1959-03-12 Bosch Gmbh Robert Process for the production of a magnetic body for high frequency coils made of finely divided magnetic particles and an insulating material
DE972150C (en) * 1937-06-27 1959-05-27 Siemens Ag Process for the production of ferromagnetic molded bodies

Also Published As

Publication number Publication date
FR734687A (en) 1932-10-25

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