DE425941C - Process for the production of magnetic cores or electrical resistance bodies from insulated pressed metal powder - Google Patents

Process for the production of magnetic cores or electrical resistance bodies from insulated pressed metal powder

Info

Publication number
DE425941C
DE425941C DEA42939D DEA0042939D DE425941C DE 425941 C DE425941 C DE 425941C DE A42939 D DEA42939 D DE A42939D DE A0042939 D DEA0042939 D DE A0042939D DE 425941 C DE425941 C DE 425941C
Authority
DE
Germany
Prior art keywords
production
insulated
electrical resistance
metal powder
magnetic cores
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
DEA42939D
Other languages
German (de)
Inventor
Dr Walther Ehlers
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.)
AEG AG
Original Assignee
AEG 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 AEG AG filed Critical AEG AG
Priority to DEA42939D priority Critical patent/DE425941C/en
Application granted granted Critical
Publication of DE425941C publication Critical patent/DE425941C/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01F1/12—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 soft-magnetic materials
    • H01F1/14—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 soft-magnetic materials metals or alloys
    • H01F1/20—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 soft-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/22—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 soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together

Description

Verfahren zur Herstellung von Magnetkernen oder elektrischen Widerstandskörpern aus isoliertem gepreßten Metallpulver. Ein technisch vielfach angewandtes Verfahren zur Herstellung von Magnetkernen oder elektrischen Widerstandskörpern usw. besteht darin, daß man isoliertes Metallpulver unter hohen Drucken zu einheitlichen Körpern zusarmnenpreßt. Selbst eine sorgfältige Isolation der Pulverteilchen führt bei diesem Verfahren nicht immer zu den erwarteten Ergebnissen.Process for the production of magnetic cores or electrical resistance bodies made of insulated pressed metal powder. A technically widely used process for the production of magnetic cores or electrical resistance bodies, etc. consists in the fact that isolated metal powder under high pressures into uniform bodies squeezes together. Even a careful isolation of the powder particles leads to this Procedure does not always produce the expected results.

Elektrische und mikroskopische Untersuchungen haben nun gezeigt, daß bei sonst guter Isolierung die Isolation an den unmittelbaren Randpartien des Preßkörpers durch die Verschiebung und die Deformation der Metallteilchen an den Wandungen der Preßform stark beeinträchtigt wird. F_rfindungsl;em'iß werden daher zur Erzielung einwandfreier Preßstücke diese Randpartien nach dein Pressen ganz oder nur an den besonders in Mitleidenschaft gezogenen Stellen, z. B. an den Kanten, entfernt.Electrical and microscopic studies have now shown that if the insulation is otherwise good, the insulation at the immediate edge parts of the pressed body by the displacement and deformation of the metal particles on the walls of the The mold is severely affected. Inventions are therefore required to achieve flawless pressed pieces these edge parts after your pressing completely or only to the particularly affected areas, e.g. B. at the edges.

Claims (1)

PATEN T-A\TSPRL; CH: Verfahren zur Herstellung von Magnetlernen oder elektrischen Widerstandskörpern aus isoliertem gepreßten Metallpulver, dadurch gekennzeichnet, daß die minderwertigen Randstellen des Preßkörpers entfernt werden.PATEN T-A \ TSPRL; CH: Process for the production of magnetic learning or electrical resistance bodies made of insulated pressed metal powder, characterized in that that the inferior edge points of the pressed body are removed.
DEA42939D 1924-08-31 1924-08-31 Process for the production of magnetic cores or electrical resistance bodies from insulated pressed metal powder Expired DE425941C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA42939D DE425941C (en) 1924-08-31 1924-08-31 Process for the production of magnetic cores or electrical resistance bodies from insulated pressed metal powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA42939D DE425941C (en) 1924-08-31 1924-08-31 Process for the production of magnetic cores or electrical resistance bodies from insulated pressed metal powder

Publications (1)

Publication Number Publication Date
DE425941C true DE425941C (en) 1926-03-01

Family

ID=6933384

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA42939D Expired DE425941C (en) 1924-08-31 1924-08-31 Process for the production of magnetic cores or electrical resistance bodies from insulated pressed metal powder

Country Status (1)

Country Link
DE (1) DE425941C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE966723C (en) * 1940-10-15 1957-09-05 Telefunken Gmbh One-piece mold for the production of mass cores from ferromagnetic powder, especially for high frequency purposes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE966723C (en) * 1940-10-15 1957-09-05 Telefunken Gmbh One-piece mold for the production of mass cores from ferromagnetic powder, especially for high frequency purposes

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