EP0291909A1 - Electric component and method of manufacturing same - Google Patents

Electric component and method of manufacturing same Download PDF

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Publication number
EP0291909A1
EP0291909A1 EP88107830A EP88107830A EP0291909A1 EP 0291909 A1 EP0291909 A1 EP 0291909A1 EP 88107830 A EP88107830 A EP 88107830A EP 88107830 A EP88107830 A EP 88107830A EP 0291909 A1 EP0291909 A1 EP 0291909A1
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EP
European Patent Office
Prior art keywords
liquid crystal
crystal polymer
component
pins
wire
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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.)
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EP88107830A
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German (de)
French (fr)
Inventor
Gerhard Dipl.-Ing. Meindl (Fh)
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Siemens AG
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Siemens AG
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Publication of EP0291909A1 publication Critical patent/EP0291909A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads

Definitions

  • the invention relates to an electrical component, in particular a coil former, made of thermoplastic material with at least one pin-shaped or flag-shaped, electrically conductive connecting element, which protrudes from the component body with its free end and is anchored in the component body with its other end.
  • the invention further relates to a method for producing such an electrical component.
  • the electrical components have to be subjected to a long-term high thermal load.
  • the enamel insulation of the winding wire ends must be burned off by high solder bath temperatures during the soldering process, without the connection pins changing or losing their position in the coil former.
  • These components are therefore required to withstand a thermal load on the connecting pins of approximately 400 to 450 ° C. for up to 10 seconds. Since thermoplastic component bodies melt under this thermal load on the connection pins in the region of the connection pins, any mechanical force acting on the connection pins leads to deformation of the component body or loosening of the connection pins at this time.
  • connection pins Since the connection pins must be aligned very precisely with respect to the component body so that they can be used, for example, in prefabricated bores in a circuit board, the use of thermoplastics for the production of the component bodies is not possible in these cases. These component bodies are therefore regularly made of thermosetting material. After curing, thermosetting material cannot be deformed by reheating and can therefore withstand the required temperature loads.
  • thermoset material has a number of disadvantages, which are particularly noticeable during manufacture. In contrast to thermoplastic material, its curing time is significantly longer, which in turn means a longer manufacturing time per component. Also, the sealing of the processing, i.e. Injection device as disadvantageous, which in turn is very specially designed, e.g. trained with a head and thus expensive pins. When the connection pins are injected into thermosetting material, the connection pin, if it does not have a head acting as a seal, is often overmoulded over its entire length, and it hardens on it, which makes it impossible to solder the winding ends to the connection pin.
  • an electrical component made of thermoplastic material with at least one electrically conductive pin protruding from the component body is known, which is provided with an anchoring end surrounded by thermosetting material and cast into the component body, which e.g. can be a flange-like head.
  • thermosetting material is first applied to an area of the anchoring end of the pin on the pin inserted into the casting mold, and the thermoplastic material for the component body is supplied in the next working cycle.
  • thermoplastic materials with all the advantages for the main part of the coil body, but it also requires thermosetting materials for anchoring the pins, which in turn means the processing disadvantages mentioned above and the difficult sealing, as before, the use of a very complex design Connection pins is necessary.
  • the present invention has for its object to provide a component for the manufacture of which during processing Disadvantages of thermosetting materials can be avoided, which is nevertheless characterized by a high thermal load capacity, such that the connecting pins retain their position even under high thermal loads.
  • the invention provides for a component of the type mentioned in the introduction that the end of the connecting element anchored in the component body is directly enveloped with liquid crystal polymer, i.e. is preferably embedded in a layer of liquid crystal polymer.
  • thermoplastic coil formers are much less expensive to manufacture than thermosetting ones.
  • connecting pins do not require flange-shaped heads or the like for their anchoring, but can only be designed as wire pins, you can pull the wire from a wire roll in the manufacture of these components and divide it into wire pins according to the desired wire pin length and then connect one end of it Press wire pins into liquid crystal polymer or overmold with it. The wire pins treated in this way are finally introduced into an injection mold with their ends embedded in liquid crystal polymer and the coil former is injected.
  • connection elements 2 are preferably pins pulled off a wire roll (not shown) and divided into desired wire pin lengths. In their ends anchored in the flange part 6, these connection elements 2 are embedded in layers 3 of liquid crystal polymer.
  • the coil former is only indicated by reference number 10.
  • a plurality of headless, pin-shaped connecting elements 9 are embedded in a common layer 8 of liquid crystal polymer in its flange part 7.
  • connection elements 2 and 9 can be removed from a common wire supply spool and, after division into the desired length, can be embedded in liquid-crystal polymer layers or encapsulated with them.
  • the headless design of the pin-shaped connecting elements enables extremely simple processing.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Of Coils (AREA)

Abstract

An electrical component, especially a coil former (1) of thermoplastic material, having at least one pin-shaped, electrically conductive terminal element (2) whose free end projects from the component former and whose other end is anchored in the component former, the component consisting essentially of thermoplastic material and only the ends, anchored in the component former, of the terminal element (2) being enveloped with liquid crystal polymer (3). <IMAGE>

Description

Die Erfindung betrifft ein elektrisches Bauteil, insbesondere Spulenkörper, aus thermoplastischem Kunststoff mit wenigstens einem stift- oder fahnenförmigen elektrisch leitenden Anschluß­element, das mit seinem freien Ende aus dem Bauteilkörper ragt und mit seinem anderen Ende im Bauteilkörper verankert ist. Die Erfindung betrifft weiterhin ein Verfahren zur Herstellung ei­nes derartigen elektrischen Bauteils.The invention relates to an electrical component, in particular a coil former, made of thermoplastic material with at least one pin-shaped or flag-shaped, electrically conductive connecting element, which protrudes from the component body with its free end and is anchored in the component body with its other end. The invention further relates to a method for producing such an electrical component.

In zahlreichen Anwendungsfällen müssen die elektrischen Bautei­le einer länger währenden hohen thermischen Belastung unterwor­fen werden. So müssen beispielsweise beim automatischen Be­wickeln der Spulenkörper und Anlöten der Wickelenden an die Anschlußstifte des Spulenkörpers die Lackisolationen der Wickel­drahtenden durch hohe Lötbadtemperaturen während des Lötvor­ganges abgebrannt werden, ohne daß die Anschlußstifte ihre Lage im Spulenkörper verändern bzw. verlieren. An diese Bauteile wird daher die Forderung gestellt, daß sie einer thermischen Belastung an den Anschlußstiften von ca. 400 bis 450°C bis zu 10 Sekunden standhalten. Da thermoplastische Bauteilkörper bei dieser thermischen Belastung an den Anschlußstiften in dem Bereich der Anschlußstifte schmelzen, führt zu diesem Zeitpunkt jede auf die Anschlußstifte wirkende mechanische Kraft zu einer Verformung des Bauteilkörpers bzw. zur Lockerung der Anschluß­stifte. Da die Anschlußstifte in Bezug auf den Bauteilkörper sehr präzise ausgerichtet sein müssen, damit sie beispielsweise in vorgefertigte Bohrungen einer Schaltungsplatte einsetzbar sind, ist die Verwendung von Thermoplasten zur Herstellung der Bauteilkörper in diesen Fällen nicht möglich. Diese Bauteilkör­per werden daher regelmäßig aus duroplastischem Material gefer­tigt. Duroplastisches Material ist nämlich nach dem Aushärten nicht durch Wiedererwärmung verformbar und kann daher den ge­forderten Temperaturbelastungen standhalten.In numerous applications, the electrical components have to be subjected to a long-term high thermal load. For example, during automatic winding of the coil former and soldering the winding ends to the connection pins of the coil former, the enamel insulation of the winding wire ends must be burned off by high solder bath temperatures during the soldering process, without the connection pins changing or losing their position in the coil former. These components are therefore required to withstand a thermal load on the connecting pins of approximately 400 to 450 ° C. for up to 10 seconds. Since thermoplastic component bodies melt under this thermal load on the connection pins in the region of the connection pins, any mechanical force acting on the connection pins leads to deformation of the component body or loosening of the connection pins at this time. Since the connection pins must be aligned very precisely with respect to the component body so that they can be used, for example, in prefabricated bores in a circuit board, the use of thermoplastics for the production of the component bodies is not possible in these cases. These component bodies are therefore regularly made of thermosetting material. After curing, thermosetting material cannot be deformed by reheating and can therefore withstand the required temperature loads.

Duroplastisches Material besitzt jedoch eine Vielzahl von Nachteilen, die sich insbesondere bei der Fertigung bemerkbar machen. Im Unterschied zu thermoplastischem Material ist dessen Aushärtezeit wesentlich höher, was wiederum eine höhere Ferti­gungszeit pro Bauteil bedingt. Auch erweist sich die gegenüber thermoplastischen Werkstoffen wesentlich schwierigere Abdich­tung der Verarbeitungs- d.h. Spritzeinrichtung als nachteilig, die wiederum sehr speziell gestaltete, z.B. mit einem Kopf aus­gebildete und damit aufwendige Anschlußstifte fordert. Beim Ein­spritzen der Anschlußstifte in duroplastisches Material wird nämlich der Anschlußstift, falls er nicht einen als Abdichtung wirkenden Kopf aufweist, häufig auf seiner gesamten Länge über­spritzt und es schlägt sich auf ihn Aushärtemasse nieder, die das Anlöten der Wickelenden an den Anschlußstift unmöglich macht.However, thermoset material has a number of disadvantages, which are particularly noticeable during manufacture. In contrast to thermoplastic material, its curing time is significantly longer, which in turn means a longer manufacturing time per component. Also, the sealing of the processing, i.e. Injection device as disadvantageous, which in turn is very specially designed, e.g. trained with a head and thus expensive pins. When the connection pins are injected into thermosetting material, the connection pin, if it does not have a head acting as a seal, is often overmoulded over its entire length, and it hardens on it, which makes it impossible to solder the winding ends to the connection pin.

Durch die DE-PS 33 41 304 C2 ist ein elektrisches Bauteil aus thermoplastischem Kunststoff mit wenigstens einem aus dem Bau­teilkörper ragenden elektrisch leitenden Stift bekannt, der mit einem von duroplastischem Material umgebenen, in den Bauteilkör­per eingegossenen Verankerungsende versehen ist, das z.B. ein flanschartiger Kopf sein kann.From DE-PS 33 41 304 C2 an electrical component made of thermoplastic material with at least one electrically conductive pin protruding from the component body is known, which is provided with an anchoring end surrounded by thermosetting material and cast into the component body, which e.g. can be a flange-like head.

Zur Herstellung dieses Bauteils wird auf den in die Gießform eingebrachten Stift zunächst eine dünne Schicht aus duroplasti­schem Material auf einen Bereich des Verankerungsendes des Stifts aufgebracht und beim nächsten Arbeitstakt das thermo­plastische Material für den Bauteilkörper zugeführt.To produce this component, a thin layer of thermosetting material is first applied to an area of the anchoring end of the pin on the pin inserted into the casting mold, and the thermoplastic material for the component body is supplied in the next working cycle.

Dieses bekannte Bauteil läßt zwar den Einsatz von thermoplasti­schen Kunststoffen mit all den Vorteilen für den Hauptteil des Spulenkörpers zu, es erfordert jedoch zur Stiftverankerung gleichfalls duroplastische Werkstoffe, womit wiederum die vor­stehend erwähnten Verarbeitungsnachteile sowie wegen der schwie­rigen Abdichtung nach wie vor der Einsatz konstruktiv sehr auf­wendig gestalteter Anschlußstifte nötig ist.This known component allows the use of thermoplastic materials with all the advantages for the main part of the coil body, but it also requires thermosetting materials for anchoring the pins, which in turn means the processing disadvantages mentioned above and the difficult sealing, as before, the use of a very complex design Connection pins is necessary.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Bauteil zu schaffen, zu dessen Herstellung die bei Verarbeitung von duroplastischen Werkstoffen auftretenden Nachteile vermie­den werden, das sich trotzdem durch eine hohe thermische Be­lastbarkeit auszeichnet, derart, daß die Anschlußstifte auch bei hoher thermischer Belastung ihre Lage bewahren.The present invention has for its object to provide a component for the manufacture of which during processing Disadvantages of thermosetting materials can be avoided, which is nevertheless characterized by a high thermal load capacity, such that the connecting pins retain their position even under high thermal loads.

Zur Lösung dieser Aufgabe sieht die Erfindung bei einem Bauteil der eingangs genannten Art vor, daß das im Bauteilkörper veran­kerte Ende des Anschlußelementes unmittelbar mit Flüssigkristall-­Polymer umhüllt, d.h. bevorzugt in eine Schicht aus Flüssig­kristall-Polymer eingebettet ist.To achieve this object, the invention provides for a component of the type mentioned in the introduction that the end of the connecting element anchored in the component body is directly enveloped with liquid crystal polymer, i.e. is preferably embedded in a layer of liquid crystal polymer.

Durch den Einsatz dieser Flüssigkristall-Polymere, die sich durch ihre hohe Temperaturfestigkeit auszeichnen, ist die Ver­wendung einfacher d.h. kopfloser Anschlußstifte möglich. Der eigentliche Spulenkörper besteht wiederum aus leicht verarbeit­baren und preiswerten thermoplastischen Kunststoffen. Durch die leichtere und schnellere Verarbeitung, die nicht erforder­lich Entgratung sowie durch die Verwendung einfacher und damit mit erheblich geringeren Abdichtproblemen behafteten kopflosen Anschlußstiften sind diese thermoplastischen Spulenkörper sehr viel weniger aufwendig herstellbar als duroplastische.By using these liquid crystal polymers, which are characterized by their high temperature resistance, the use is easier i.e. headless pins possible. The actual coil body in turn consists of easily processable and inexpensive thermoplastic materials. Due to the easier and faster processing, the unnecessary deburring and the use of simple and thus with considerably less sealing problems, headless connecting pins, these thermoplastic coil formers are much less expensive to manufacture than thermosetting ones.

Da die Anschlußstifte zu ihrer Verankerung keine flanschförmi­gen Köpfe oder dergleichen benötigen, sondern lediglich als Drahtstifte gestaltet sein können, kann man bei der Herstel­lung dieser Bauteile den Draht von einer Drahtrolle abziehen und entsprechend der gewünschten Drahtstiftlänge in Drahtstifte zerteilen und im Anschluß hieran die einen Enden der Draht­stifte in Flüssigkristall-Polymer eindrücken oder mit diesem umspritzen. Die so behandelten Drahtstifte werden schließlich mit ihren in Flüssigkristall-Polymer eingebetteten Enden in eine Spritzform eingebracht und der Spulenkörper gespritzt.Since the connecting pins do not require flange-shaped heads or the like for their anchoring, but can only be designed as wire pins, you can pull the wire from a wire roll in the manufacture of these components and divide it into wire pins according to the desired wire pin length and then connect one end of it Press wire pins into liquid crystal polymer or overmold with it. The wire pins treated in this way are finally introduced into an injection mold with their ends embedded in liquid crystal polymer and the coil former is injected.

Die Erfindung wird nachstehend anhand der Zeichnung näher er­läutert. Es zeigt:

  • FIG 1 in geschnittener Darstellung ein erstes Ausführungs­beispiel des Gegenstandes nach der Erfindung;
  • FIG 2 in geschnittener und teils gebrochener Ansicht ein weiteres Ausführungsbeispiel des Gegenstandes nach der Erfindung.
The invention is explained below with reference to the drawing. It shows:
  • 1 shows a sectional view of a first embodiment of the object according to the invention;
  • 2 in a cut and partly broken view Another embodiment of the object according to the invention.

Die FIG 1 zeigt ein elektrisches Bauteil, nämlich einen Spulen­körper 1 für elektrische Spulen, dessen Hauptteil 4 einschließ­lich seiner Flansche 5, 6 aus thermoplastischem Kunststoff be­steht. Als Anschlußelemente 2 dienen bevorzugt von einer nicht dargestellten Drahtrolle abgezogene und in gewünschte Draht­stiftlängen zerteilte Stifte. In ihren im Flanschteil 6 veran­kerten Enden sind diese Anschlußelemente 2 in Schichten 3 aus Flüssigkristall-Polymer eingebettet.1 shows an electrical component, namely a coil former 1 for electrical coils, the main part 4 including its flanges 5, 6 made of thermoplastic material. The connecting elements 2 are preferably pins pulled off a wire roll (not shown) and divided into desired wire pin lengths. In their ends anchored in the flange part 6, these connection elements 2 are embedded in layers 3 of liquid crystal polymer.

Beim Ausführungsbeispiel nach FIG 2 ist der Spulenkörper durch das Bezugszeichen 10 lediglich angedeutet. In seinem Flansch­teil 7 sind im Unterschied zum Ausführungsbeispiel nach FIG 1 jeweils mehrere kopflose, stiftförmige Anschlußelemente 9 in eine gemeinsame Schicht 8 aus Flüssigkristall-Polymer einge­bettet.In the exemplary embodiment according to FIG. 2, the coil former is only indicated by reference number 10. In contrast to the exemplary embodiment according to FIG. 1, a plurality of headless, pin-shaped connecting elements 9 are embedded in a common layer 8 of liquid crystal polymer in its flange part 7.

Die Anschlußelemente 2 bzw. 9 lassen sich, wie bereits erwähnt, von einer gemeinsamen Drahtvorratsspule abziehen und nach Zer­teilen in die gewünschte Länge jeweils in Flüssigkristall-Poly­merschichten einbetten oder mit diesen umspritzen. Die kopf­lose Ausbildung der stiftförmigen Anschlußelemente ermöglicht eine denkbar einfache Verarbeitung.As already mentioned, the connection elements 2 and 9 can be removed from a common wire supply spool and, after division into the desired length, can be embedded in liquid-crystal polymer layers or encapsulated with them. The headless design of the pin-shaped connecting elements enables extremely simple processing.

Claims (5)

1. Elektrisches Bauteil, insbesondere Spulenkörper, aus thermo­plastischem Kunststoff, mit wenigsten einem stift- oder fahnen­förmigen, elektrisch leitenden Anschlußelement, das mit sei­nem freien Ende aus dem Bauteilkörper ragt und mit seinem an­deren Ende im Bauteilkörper verankert ist,dadurch gekennzeichnet, daß das im Bauteilkörper (1 bzw. 10) verankerte Ende des Anschlußelements (2 bzw. 9) unmittelbar mit Flüsssigkristall-Polymer (3 bzw. 8) umhüllt ist.1. Electrical component, in particular coil body, made of thermoplastic, with at least one pin-shaped or flag-shaped, electrically conductive connecting element, which protrudes with its free end from the component body and is anchored at its other end in the component body, characterized in that that in the component body (1 or 10) anchored end of the connecting element (2 or 9) is directly coated with liquid crystal polymer (3 or 8). 2. Elektrisches Bauteil nach Anspruch 1,dadurch gekennzeichnet, daß das im Bauteilkörper (4 bzw. 10) verankerte Ende des Anschlußelements (2 bzw. 9) in eine Schicht aus Flüssigkristall-Polymer (3 bzw. 8) eingebet­tet ist.2. Electrical component according to claim 1, characterized in that the end of the connecting element (2 or 9) anchored in the component body (4 or 10) is embedded in a layer of liquid crystal polymer (3 or 8). 3. Elektrisches Bauteil nach Anspruch 1,dadurch gekennzeichnet, daß das Anschlußelement (2 bzw. 9) ein Drahtstift ist.3. Electrical component according to claim 1, characterized in that the connecting element (2 or 9) is a wire pin. 4. Verfahren zur Herstellung eines elektrischen Bauteils nach Anspruch 1,dadurch gekennzeichnet, daß Draht von einer Drahvorratsrolle abgezogen und entsprechend der gewünschten Drahtstiftlänge in Kontaktstifte zerteilt wird, daß die einen Enden der Drahtstifte in Flüssigkristall-Polymer eingedrückt oder mit Flüssigkristall-Polymer umspritzt werden, und daß anschließend die Kontaktstifte mit ihren in Flüssig­kristall-Polymer eingebetteten Enden in eine Spritzform einge­bracht und der Spulenkörper gespritzt wird.4. A method for producing an electrical component according to claim 1, characterized in that wire is drawn off a wire supply roll and divided into contact pins according to the desired wire pin length, that the one ends of the wire pins are pressed into liquid crystal polymer or extrusion-coated with liquid crystal polymer, and that the contact pins with their ends embedded in liquid crystal polymer are then introduced into an injection mold and the coil former is injected. 5. Verfahren nach Anspruch 4,dadurch gekenn­zeichnet, daß mehrere Stifte (9) gleichzeitig in eine gemeinsame Flüssigkristall-Polymerschicht (8) eingedrückt oder mit dieser umspritzt werden.5. The method according to claim 4, characterized in that a plurality of pins (9) are simultaneously pressed into a common liquid crystal polymer layer (8) or extrusion-coated with the latter.
EP88107830A 1987-05-19 1988-05-16 Electric component and method of manufacturing same Withdrawn EP0291909A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3716789 1987-05-19
DE3716789 1987-05-19

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EP0291909A1 true EP0291909A1 (en) 1988-11-23

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3496505A (en) * 1967-07-06 1970-02-17 Arthur Johannsen Transformer bobbins with means for mounting terminals thereon
DE2355834A1 (en) * 1973-11-08 1975-07-17 Nordmende Multisectional anti-fire coil former for mains transformer - consists of two section former of hardenable material
NL7711981A (en) * 1977-11-01 1979-05-03 Philips Nv Thermoplastic coil former moulded around ferromagnetic core - has cut=outs and anchors and has pins resistant to mechanical and thermal stresses
GB2129772A (en) * 1982-11-08 1984-05-23 Plessey Co Plc A transformer bobbin
DE3341304A1 (en) * 1983-11-15 1985-05-23 Hohenloher Spulenkörperfabrik, 7110 Öhringen Plastic electrical component, and a method for its production
DE3414040A1 (en) * 1984-04-13 1985-10-17 Siemens AG, 1000 Berlin und 8000 München Electric connection elements, in particular for coil formers of inductive electric components

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3496505A (en) * 1967-07-06 1970-02-17 Arthur Johannsen Transformer bobbins with means for mounting terminals thereon
DE2355834A1 (en) * 1973-11-08 1975-07-17 Nordmende Multisectional anti-fire coil former for mains transformer - consists of two section former of hardenable material
NL7711981A (en) * 1977-11-01 1979-05-03 Philips Nv Thermoplastic coil former moulded around ferromagnetic core - has cut=outs and anchors and has pins resistant to mechanical and thermal stresses
GB2129772A (en) * 1982-11-08 1984-05-23 Plessey Co Plc A transformer bobbin
DE3341304A1 (en) * 1983-11-15 1985-05-23 Hohenloher Spulenkörperfabrik, 7110 Öhringen Plastic electrical component, and a method for its production
DE3414040A1 (en) * 1984-04-13 1985-10-17 Siemens AG, 1000 Berlin und 8000 München Electric connection elements, in particular for coil formers of inductive electric components

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JAPANESE PATENT REPORT, Woche 8340, Nr. AN-83-779 542, 1983, Derwent Publications Ltd, London, GB; & JP-A-58 143 516 (MATSUSHITA ELEC. IND. K.K.) 26-08-1983 *
WIRELESS WORLD, Juli 1971, Seite 351; "Solder tags for inductors" *

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