DE761316C - Process for the production of mass cores, especially for the purposes of high frequency technology - Google Patents

Process for the production of mass cores, especially for the purposes of high frequency technology

Info

Publication number
DE761316C
DE761316C DES149776D DES0149776D DE761316C DE 761316 C DE761316 C DE 761316C DE S149776 D DES149776 D DE S149776D DE S0149776 D DES0149776 D DE S0149776D DE 761316 C DE761316 C DE 761316C
Authority
DE
Germany
Prior art keywords
purposes
production
mass
high frequency
frequency technology
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
DES149776D
Other languages
German (de)
Inventor
Martin Dipl-Ing Kersten
Kurt Klesse
Gerhard Liepold
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens 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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Priority to DES149776D priority Critical patent/DE761316C/en
Application granted granted Critical
Publication of DE761316C publication Critical patent/DE761316C/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
    • H01F1/24—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 the particles being insulated
    • H01F1/26—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 the particles being insulated by macromolecular organic substances
    • 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
    • H01F1/24—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 the particles being insulated

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Description

Verfahren zur Herstellung von Massekernen, insbesondere für die Zwecke der Hochfrequenztechnik Es ist bekannt, Massekerne, insbesondere für die Zwecke der Hochfrequenztechnik, in sogenanntem Spritzgußverfahren herzustellen. Dies geschieht, indem die Kernmasse, welche im wesentlichen aus einem magnetisierbaren Pulver, z. B. Eisenpulver, und einem pulverisiertem Isolierstoff besteht, im erwärmten, -nähflüssigen Zustand in eine Spritzform unter einem gewissen Druck eingebracht wird. während des Spritzverfahrens wird die Form, in welche die Masse eingespritzt wird, gekühlt oder auf Raumtemperatur belassen. Infolge dieser Kühlung wird ein schnelles Hartwerden der Kerne erreicht. Es hat sich nun gezeigt, daß bei der Verwendung von besonders zähflüssigen Massen und auch bei der Herstellung verhältnismäßig langer Kerne ein Erstarren derjenigen Teile der Spritzmasse einsetzt, welche in die Form zuerst gelangen, bevor die Form völlig ausgespritzt ist. Die zähflüssige Spritzmasse ist häufig zu träge, um den Massekern in der Form schnell genug auszubilden.Process for the production of mass cores, in particular for the purposes The high-frequency technology It is known, ground cores, especially for the purpose high-frequency technology, using what is known as an injection molding process. This happens, by the core mass, which consists essentially of a magnetizable powder, e.g. B. iron powder, and a pulverized insulating material, in the heated, -nähiquidigen State is introduced into an injection mold under a certain pressure. while During the injection molding process, the mold into which the compound is injected is cooled or leave at room temperature. As a result of this cooling, hardening occurs quickly of the cores reached. It has now been shown that when using particularly viscous masses and also in the production of relatively long cores The solidification of those parts of the injection molding compound that get into the mold first, before the mold is completely squirted out. The viscous spray compound is often too sluggish to form the mass core in the mold quickly enough.

Die vorliegende Erfindung bezieht sich@nun auf ein Verfahren zur Herstellung von Massekernen, insbesondere für die Zwecke der Hochfrequenztechnik, und bezweckt, den angeführten Nachteil zu vermeiden.The present invention now relates to a method of manufacture of mass cores, especially for the purposes of High frequency technology, and aims to avoid the disadvantage mentioned.

Gemäß der Erfindung wird dies dadurch erreicht, daß die Spritzform während des Spritzvorganges zusätzlich beheizt wird. Es ist zweckmäßig, die Temperatur etwas unterhalb der Erweichungstemperatur des thermoplastischen Bindemittels zu wählen. Als zweckmäßig hat es sich erwiesen, die Spritzform auf eine Temperatur zu erwärmen, welche etwa io bis i2°C unterhalb der Erweichungstemperatur des thermoplastischen Bindemittels liegt. Die Einhaltung dieser Differenz genügt, um zu erreichen, daß der Kern fest wird, wobei gewährleistet ist. daß die Verfestigung nicht zu schnell geht. wenigstens nicht, bevor der Kern in seiner gewünschten Form voll ausgespritzt ist. Weiterhin hat es sich- ergeben, daß die nach dem Verfahren gemäß der vorliegenden Erfindung hergestellten Kerne eine gute Oberfläche erhalten, ohne daß besondere 'Maßnahmen getroffen zu werden brauchen.According to the invention this is achieved in that the injection mold is additionally heated during the spraying process. It is convenient to adjust the temperature slightly below the softening temperature of the thermoplastic binder Select. It has proven to be useful to bring the injection mold to a temperature to heat, which is about io to i2 ° C below the softening temperature of the thermoplastic Binder lies. Compliance with this difference is sufficient to achieve that the core becomes solid, which is guaranteed. that the solidification does not go too fast goes. at least not before the core is fully injected in its desired shape is. Furthermore, it has been found that by the method according to the present Invention produced cores get a good surface without special 'Action need to be taken.

Das eben beschriebene Verfahren wird besonders dann angewendet, wenn das magnetisierbare Pulver, insbesondere Eisenpulver, mit mindestens zwei Sorten von Thermoplasten verschiedener Wärmebeständigkeit gemischt verspritzt werden soll. Bei einer derartigen Spritzmasse ergibt sich nämlich, daß die hohe Zähflüssigkeit besonders berücksichtigt werden muß. Der -Vorteil solcher Kerne mit einer 'lischung von Thermoplasten verschiedener Wärmebeständigkeit ist aber wiederum darin zu sehen, daß die Wärmebeständigkeit des fertigen Kernes größer ist als die, welche durch die Verwendung nur der einen thermoplastischen Masse mit weniger wärmebeständiger Eigenschaft hervorgerufen werden würde. Als Thermoplaste kommen in erster Linie solche in Frage, welche auf der Basis der Polvstvrole, Polvvinvle, Polyamide oder Polvacrvle aufgebaut sind.The method just described is particularly used when the magnetizable powder, especially iron powder, with at least two types mixed with thermoplastics of different heat resistance is to be sprayed. In the case of such a molding compound, the result is that the high viscosity special consideration must be given. The advantage of such kernels with a mixture of thermoplastics of different heat resistance is to be seen in turn that the heat resistance of the finished core is greater than that which by the use of only the one thermoplastic mass with less heat resistant Property would be evoked. As thermoplastics come in the first place those in question, which are based on Polvstvrole, Polvvinvle, or polyamides Polvacrvle are constructed.

Claims (3)

PATGNTANSPRt-G1iE: i. Verfahren zur Herstellung von 'Massekernen, insbesondere für die Zwecke der Hochfrequenztechnik, dadurch gekennzeichnet, daß die Spritzform, in welche das Massekernmaterial eingespritzt wird, während des Spritzvorganges zusätzlich beheizt wird. PATGNTANSPRt-G1iE: i. Process for the production of 'mass cores, in particular for the purposes of high frequency technology, characterized in that the injection mold into which the mass core material is injected during the injection process is additionally heated. 2. Verfahren nach Anspruch i. dadurch gekennzeichnet, daß die Temperatur, auf welche die Spritzform während des Spritzvorganges gebracht wird, etwas unterhall) der Erweichungstemperatur, nämlich etwa io bis 12-C. des thermoplastischen Bindemittels liegt. 2. The method according to claim i. characterized in that the temperature to which the injection mold is brought during the injection process is somewhat below the softening temperature, namely approximately 10 to 12 ° C. of the thermoplastic binder. 3. Verfahren nach den Ansprüchen i und 2, dadurch gekennzeichnet, daß das magnetisierbare Pulver, insbesondere Eisenpulver, mit mindestens zwei Sorten von Thermoplasten verschiedener Wärmebeständigkeit gemischt und unter Anwendung von Wärme und Druck in die zusätzlich beheizte Form gespritzt wird. d. Verfahren nach den Ansprüchen i bis 3, gekennzeichnet durch die Verwendung von Thermoplasten, welche auf der Basis der Polvvinyle, Polystyrole, Polyamide oder Poly-acrvle aufgebaut sind.3. The method according to claims i and 2, characterized in that the magnetizable powder, in particular iron powder, mixed with at least two types of thermoplastics of different heat resistance and injected into the additionally heated mold using heat and pressure will. d. Process according to claims i to 3, characterized by the use of thermoplastics, which are based on polyvinyls, polystyrenes, polyamides or Poly-acrvle are constructed.
DES149776D 1942-04-03 1942-04-03 Process for the production of mass cores, especially for the purposes of high frequency technology Expired DE761316C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES149776D DE761316C (en) 1942-04-03 1942-04-03 Process for the production of mass cores, especially for the purposes of high frequency technology

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES149776D DE761316C (en) 1942-04-03 1942-04-03 Process for the production of mass cores, especially for the purposes of high frequency technology

Publications (1)

Publication Number Publication Date
DE761316C true DE761316C (en) 1954-05-24

Family

ID=7542639

Family Applications (1)

Application Number Title Priority Date Filing Date
DES149776D Expired DE761316C (en) 1942-04-03 1942-04-03 Process for the production of mass cores, especially for the purposes of high frequency technology

Country Status (1)

Country Link
DE (1) DE761316C (en)

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