DE458444C - Process for the production of magnetic cores from powdery material, in particular for telecommunication loading coils - Google Patents
Process for the production of magnetic cores from powdery material, in particular for telecommunication loading coilsInfo
- Publication number
- DE458444C DE458444C DEA46551D DEA0046551D DE458444C DE 458444 C DE458444 C DE 458444C DE A46551 D DEA46551 D DE A46551D DE A0046551 D DEA0046551 D DE A0046551D DE 458444 C DE458444 C DE 458444C
- Authority
- DE
- Germany
- Prior art keywords
- powdery material
- vessel
- production
- telecommunication
- 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
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/06—Compacting only by centrifugal forces
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Description
Verfahren zur Herstellung von Magnetkernen aus pulverförmigem Material, insbesondere für Fernmelde-Belastungsspulen. Man verwendet insbesondere in der Fernmeldetechnik Magnetkerne für Induktionsspulen aus pulverförmigem Material, da in diesem Zustand das magnetische Material eine. genügend feine Unterteilung aufweist und dadurch die an einen solchen Magnetkern gestellten Bedingungen bezüglich seiner magnetischen und elektrischen Eigenschaften erreicht werden. Dieses Pulver wird gegebenenfalls mit Isolierstoffen vermengt und die Mischung unter verhältnismäßig hohemDruck zu einer festen Form zusammengepreßt. Die Anwendung des hohen Druckes hat verschiedene Nachteile zur Folge. Beispielsweise ist (las Pressen technisch schwierig und sehr kostspielig.Process for the production of magnetic cores from powdery material, especially for telecommunication loading coils. It is used in particular in telecommunications technology Magnetic cores for induction coils made of powdery material, as they are in this state the magnetic material one. has enough fine subdivision and thereby the conditions placed on such a magnetic core with regard to its magnetic and electrical properties can be achieved. This powder is used if necessary mixed with insulating materials and the mixture under relatively high pressure compressed into a solid shape. The application of high pressure has several Disadvantages result. For example, (las pressing is technically difficult and very expensive.
Gegenstand der Erfindung ist nun ein Verfahren zur Herstellung von Magnetkernen , pulverförinigein Material, insbesondere i aus für Fernmelde-Belastungsspulen, bei welchem die Lagerung der Pulverteilchen des Kernes unter der Einwirkung von unmittelbar an ihnen selbst angreifenden Fliehkräften erfolgt.The invention is now a process for the production of magnetic cores, pulverförinigein material, particular of i for telecommunications loading coil, wherein the storage of the powder of the core under the effect of directly acting on themselves centrifugal forces.
Hierdurch wird das nachteilig wirkende Pressen vermieden, und (tie Lagerung der Teilchen erfolgt lediglich unter der Einwirkung der Fliehkräfte, welche die auf die Teilchen wirkende Schwerkraft um ein Vielfaches übersteigen. Durch das Verfahren wird eine giinstige Lagerung der Teilchen erreicht, die den hinsichtlich seiner elektrischen und magnetischen Eigenschaften an den Kern gestellten Anforderungen entspricht.This avoids the detrimental pressing, and (tie Storage of the particles takes place only under the action of centrifugal forces, which exceed the force of gravity acting on the particles many times over. By the Process a favorable storage of the particles is achieved, which in terms of its electrical and magnetic properties placed on the core is equivalent to.
Das Verfahren gemäß der Erfindung wird nun in der Weise ausgeführt, daß das Pulver, das in ein um eine Achse drehbares Gefäß gebracht wird, durch schnelle Rotation dieses Gefäßes Fliehkräften ausgesetzt wird. Durch die Wirkung dieser Fliehkräfte -wird das Material an der äußeren Wand des Gefäßes zu einem festen Gefüge zusammengelagert. Zur Erzielung einer gleichmäßigen Lagerung empfiehlt es sich, das Material während der Rotation des Gefäßes langsam bzw. in kleinen Mengen einlaufen zu lassen. Dadurch wird erreicht, daß das bereits darin befindliche 'Material schon so fest liegt, daß eine Umschichtung desselben durch die Zufügung weiteren Pulvers nicht mehr erfolgt. Zur Erzielung einer geniigend großen mechanischen Festigkeit wird dem magnetischen Pulver in an sich bekannter Weise ein flüssiges, isolierendes Bindemittel, z.B. Kunstharz, beigemengt, und zwar kann die Beimengung vor, während oder nach der Lagerung der Teilchen erfolgen. Geschieht die Beimengung des Bindemittels während der Rotation des Gefäßes, so wird dadurch eine gute Durchdringung des Körpers mit dem Bindemittel erzielt, während die Fliehkraft die Teilchen noch fest zusammendrückt. Bringt man das magnetische Pulver bereits mit dem Bindemittel gemischt in die Form, so wird durch das Rotieren das spezifisch schwerere magnetische Material gegen die äußere Wand des Gefäßes gepreßt, und das überschüssige Bindemittel bleibt in der Mitte übrig und kann abgegossen werden. Die Erhärtung des Bindemittels geschieht durch Trocknen oder Erkaltenlassen, und zwar kann das Trocknen sowohl nach oder schon während der Rotation durch Beheizung des Gefäßes erfolgen.The method according to the invention is now carried out in the manner that the powder, which is brought into a vessel that can be rotated about an axis, by rapid Rotation of this vessel is exposed to centrifugal forces. Due to the effect of these centrifugal forces -The material is stored together on the outer wall of the vessel to form a solid structure. To achieve an even storage, it is advisable to keep the material during the rotation of the vessel slowly or in small quantities. Through this it is achieved that the material already in it is already so solid, that it is no longer rearranged by adding more powder. To achieve a sufficiently high mechanical strength, the magnetic Powder in a manner known per se, a liquid, insulating binder, e.g. Synthetic resin, added, and that can be added before, during or after storage of the particles. Happens the addition of the binder During the rotation of the vessel, this will allow good penetration of the body achieved with the binder, while the centrifugal force still firmly compresses the particles. If you bring the magnetic powder already mixed with the binder into the mold, so by rotating the specifically heavier magnetic material against the outer wall of the vessel pressed, and the excess binder remains in the Middle left and can be poured off. The hardening of the binding agent takes place by drying or letting it cool, namely drying can be done either after or take place during the rotation by heating the vessel.
Das Gefäß muß zerlegbar sein, damit der fertige Kern herausgenommen werden kann. Bei einer von der Ringform abweichenden Form des Kernes werden geeignet geformte Gefäße in einem Schleuderapparat angeordnet.The vessel must be able to be dismantled so that the finished core can be removed can be. If the shape of the core deviates from the ring shape, these are suitable shaped vessels placed in a spinner.
In den Abb. i bis 4 sind Ausführungsbeispiele des Verfahrens dargestellt.In Figs. I to 4 exemplary embodiments of the method are shown.
Abb. i zeigt das mit dem Material gefüllte, zerlegbare Gefäß, dessen unterer Teil mit einer auf der Antriebachse c sitzenden Platte b fest verbunden ist; Abb. 2 zeigt, wie das Pulver während der Rotation durch einen Trichter allmählich in das Gefäß eingeführt wird; Abb. 3 zeigt das Trocknen des Bindemittels mittels einer Flamme während der Rotation; Abb. 4 zeigt eine Anordnung zur Herstellung von Körpern, die nicht ringförmig sind. Die Kernformen e sind dabei symmetrisch zueinander balkonartig am Sammelbehälter angeordnet.Fig. I shows the container filled with the material, which can be dismantled, its The lower part is firmly connected to a plate b seated on the drive axis c is; Fig. 2 shows how the powder gradually rotates through a funnel is introduced into the vessel; Fig. 3 shows the drying of the binder by means of a flame while rotating; Fig. 4 shows an arrangement for producing Bodies that are not ring-shaped. The core shapes e are symmetrical to one another Arranged like a balcony on the collecting container.
Das Verfahren gemäß der Erfindung bring also eine Vereinfachung der Herstellung der Magnetkerne unter Fortfall des kostspieligen Pressens und dadurch eine nicht unwesentliche Verbilligung der Fabrikation. Dieses Verfahren kann auch sinngemäß zur Herstellung beliebiger Widerstandskörper angewandt werden.The method according to the invention thus brings a simplification of the Manufacture of the magnetic cores with the elimination of costly pressing and thereby a not insignificant cheaper production. This procedure can also can be used accordingly for the production of any resistance body.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA46551D DE458444C (en) | 1925-12-09 | 1925-12-09 | Process for the production of magnetic cores from powdery material, in particular for telecommunication loading coils |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA46551D DE458444C (en) | 1925-12-09 | 1925-12-09 | Process for the production of magnetic cores from powdery material, in particular for telecommunication loading coils |
Publications (1)
Publication Number | Publication Date |
---|---|
DE458444C true DE458444C (en) | 1928-04-11 |
Family
ID=6935313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA46551D Expired DE458444C (en) | 1925-12-09 | 1925-12-09 | Process for the production of magnetic cores from powdery material, in particular for telecommunication loading coils |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE458444C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1196109B (en) * | 1958-07-31 | 1965-07-01 | Siemens Ag | Process for the production of a rotationally symmetrical core made of oxide ceramic ferromagnetic material for television deflection units |
-
1925
- 1925-12-09 DE DEA46551D patent/DE458444C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1196109B (en) * | 1958-07-31 | 1965-07-01 | Siemens Ag | Process for the production of a rotationally symmetrical core made of oxide ceramic ferromagnetic material for television deflection units |
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