EP2792029B1 - Fluid-tight via - Google Patents

Fluid-tight via Download PDF

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Publication number
EP2792029B1
EP2792029B1 EP12809669.0A EP12809669A EP2792029B1 EP 2792029 B1 EP2792029 B1 EP 2792029B1 EP 12809669 A EP12809669 A EP 12809669A EP 2792029 B1 EP2792029 B1 EP 2792029B1
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EP
European Patent Office
Prior art keywords
liquid
contact
flat contact
flat
plastic body
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.)
Not-in-force
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EP12809669.0A
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German (de)
French (fr)
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EP2792029A1 (en
Inventor
Gerd Kindermann
Uwe Raschke
Uwe Pitzul
Marek Ciezarek
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Kostal Kontakt Systeme GmbH
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Kostal Kontakt Systeme GmbH
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Publication of EP2792029A1 publication Critical patent/EP2792029A1/en
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Publication of EP2792029B1 publication Critical patent/EP2792029B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/521—Sealing between contact members and housing, e.g. sealing insert
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
    • H01R13/41—Securing in non-demountable manner, e.g. moulding, riveting by frictional grip in grommet, panel or base
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/005—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for making dustproof, splashproof, drip-proof, waterproof, or flameproof connection, coupling, or casing

Definitions

  • the invention relates to a fluid-tight contact bushing through a plastic body, with at least one flat contact having one or more cross-sectional changes on an overmolded portion.
  • Such a fluid-tight contact bushing is from the DE 10 2009 058 525 A1 known.
  • the flat contact has at least one section with a circumferentially tapering cross-sectional contour in the axial direction. After encapsulation, the flat contact is displaced in the direction of its taper (s) against the encapsulation, whereby the cavities are closed along the lateral surfaces of the tapered contour and so the contact bushing is sealed along axial sections of the flat contact.
  • the cavities, which are sealed here by the displacement of the flat contact, are caused by shrinkage processes during cooling of the plastic material.
  • thermoplastic materials change their internal structure during cooling, which reduces the volume of material.
  • the plastic body consists of a non-shrinking Duroplastmaterial that the longitudinal edges of the at least one flat contact are rounded, and that the cross-sectional changes are performed by recesses.
  • the solution of the problem thus consists of the combination of a specially selected Umspritzungsmaterials with a special shape of the flat contact. Together these features allow a contact bushing which is at least fluid-tight and which, for a defined pressure range, may even be gas-tight.
  • thermoset material for encapsulation of the at least one flat contact.
  • thermoplastics commonly used for injection molding can be found below Duroplast materials, which do not reduce their volume during curing, but keep constant or even increase.
  • non-shrinking thermoset materials which are also referred to as "zero-decayers", which neither reduce nor increase their volume, have proven suitable. Such materials are found, for example, in the substance groups of epoxy resins, phenolic resins or the so-called bulk molding compounds (BMC).
  • BMC bulk molding compounds
  • thermoset material In order to ensure a uniform connection between the thermoset material and the flat contact, it is also provided to round the longitudinal edges of the at least one flat contact.
  • the flat contact thus has no exactly rectangular cross-section, but a rectangular cross-section with rounded transitions between the cross-sectional sides.
  • This profile is schematic in the FIG. 5 shown.
  • the at least one flat contact also has on a molded portion at its edge portions of one or more rectangular or rounded recesses, as exemplified in the FIGS. 3 and 4 are shown. As a result, the cross-sectional width of the flat contact varies in its axial direction.
  • the recesses cause the at least one flat contact after the encapsulation is positively connected to the Umspritzungsmaterial.
  • the recesses also form in the axial direction of the flat contact a labyrinth structure, which for the adjacent medium a causes multi-stage pressure drop, which further improves the sealing properties of the contact bushing.
  • the overmolding material according to the invention does not change its material volume during processing and therefore fills the recesses tightly.
  • the at least one flat contact and the overmolding material have as similar as possible and ideally the same temperature expansion coefficients. As a result, both mechanical stresses and cavity formations, which would impair the sealing properties, can be avoided over a wide temperature range.
  • the material connection between the at least one flat contact and the plastic body formed by the encapsulation can be further improved by applying a bonding agent.
  • the non-encapsulated end portions of the at least one flat contact can be treated by a galvanic process, without the encapsulated areas are affected.
  • the overmolded and non-overmolded regions of the at least one flat contact can be provided with different galvanic coatings, which have particularly favorable properties for the respective region.
  • only the non-overmolded regions of the at least one flat contact have a tin or silver coating.
  • the non-surface-treated and optionally provided with a tarnish protection flat contacts can be encapsulated in the production process first, and then the surfaces protruding from the plastic body ends of the flat contacts surface-treated and optionally passivated. Since this only partial sections of the tabs are treated, a savings of silver and passivation is also advantageously achieved.
  • FIG. 1 shows a sectional view of a connector housing 6, which has a fluid-tight passage of flat contacts 1 between two chambers 9, 10.
  • the connector housing 6 is made as an injection molded part, wherein for the production of the connector housing 6 sections 4 of the flat contacts 1 were encapsulated with a non-shrinking Duroplastmaterial.
  • FIG. 1 shown two-pole version of a contact bushing is purely natural example.
  • a contact feedthrough according to the invention can have a freely definable number of molded flat contacts 1, in particular also contact feedthroughs each with a single flat contact 1 or else with a higher number of flat contacts 1 can be executed.
  • the FIG. 2 shows a further example, a contact bushing with seven flat contacts 1, which are arranged in three mutually parallel rows.
  • FIGS. 3 and 4 in each case a single flat contact 1, 1 'is shown, which is surrounded on a section 4 by an encapsulation 3.
  • the encapsulation 3 shown as a hatched area here illustrates schematically in each case a flat plug 1, 1 'directly surrounding Partial volume of a plastic body 2, as in the FIGS. 1 or 2 is shown.
  • the flat contact 1, 1 ' has a plurality of cross-sectional changes, which are in the form of rounded recesses 5a (FIG. FIG. 3 ) or rectangular recesses 5b (FIG. FIG. 4 ) are introduced into the longitudinal sides of the flat contact 1 or 1 '.
  • the encapsulation 3 forms a positive connection with the recesses 5a and 5b, which is fluid-tight in a wide temperature and pressure range due to the zero-deceleration properties of the thermoset material provided for this purpose.
  • non-encapsulated end sections 7a, 7b of the flat contact 1, 1 ' can be treated galvanically; For example, to improve the electrical contact properties are provided with a silver coating.
  • FIG. 5 shows a section from the in the FIG. 4 illustrated flat contact 1 'in a cross-sectional view.
  • One of the recesses 5b is visible, through which the cross-sectional width b of the flat contact 1 'varies in its axial direction a.
  • Visible are also rounded longitudinal edges 8 of the flat contact 1 ', which are formed on the punching side by the punching tool and on the ridge side by a pre-stamping to the flat contact 1'.
  • the rounded longitudinal edges 8 substantially improve the connection of the flat contact 1 'to Umspritzungsmaterial.

Description

Die Erfindung betrifft eine fluiddichte Kontaktdurchführung durch einen Kunststoffkörper, mit mindestens einem Flachkontakt, der auf einem umspritzten Teilstück eine oder mehrere Querschnittsänderungen aufweist.The invention relates to a fluid-tight contact bushing through a plastic body, with at least one flat contact having one or more cross-sectional changes on an overmolded portion.

Eine derartige fluiddichte Kontaktdurchführung ist aus der DE 10 2009 058 525 A1 bekannt. Bei dieser Kontaktdurchführung weist der Flachkontakt mindestens einen Abschnitt mit einer umlaufend sich in axialer Richtung verjüngenden Querschnittskontur auf. Nach dem Umspritzen wird der Flachkontakt in Richtung seiner Verjüngung(en) gegen die Umspritzung verschoben, wodurch die Kavitäten entlang der Mantelflächen der sich verjüngenden Kontur verschlossen werden und so die Kontaktdurchführung entlang axialer Abschnitte des Flachkontakts abgedichtet wird.Such a fluid-tight contact bushing is from the DE 10 2009 058 525 A1 known. In this contact bushing, the flat contact has at least one section with a circumferentially tapering cross-sectional contour in the axial direction. After encapsulation, the flat contact is displaced in the direction of its taper (s) against the encapsulation, whereby the cavities are closed along the lateral surfaces of the tapered contour and so the contact bushing is sealed along axial sections of the flat contact.

Die Kavitäten, die hier durch die Verschiebung des Flachkontakts abgedichtet werden, entstehen durch Schrumpfungsprozesse beim Abkühlen des Kunststoffmaterials. Besonders thermoplastische Materialien verändern beim Abkühlen ihre innere Struktur, wodurch sich das Materialvolumen vermindert. Durch diese Nachschwindung entsteht zu dem Kontakt ein kleiner Spalt, der auf die beschriebene Weise abgedichtet wird. Allerdings ist unter schwierigen Umgebungsbedingungen, wie hohen Drücken und Temperaturen, die dabei erreichbare Dichtigkeit oft nicht ausreichend.The cavities, which are sealed here by the displacement of the flat contact, are caused by shrinkage processes during cooling of the plastic material. Especially thermoplastic materials change their internal structure during cooling, which reduces the volume of material. By this Nachschwindung formed to the contact a small gap, which is sealed in the manner described. However, under difficult environmental conditions, such as high pressures and temperatures, the achievable tightness is often insufficient.

Anspruchsvolle Umgebungsbedingungen sind beispielsweise bei Steckverbindern gegeben, die in Getriebegehäusen von Kraftfahrzeugen eingebaut sind. Solche Steckverbinder sind wechselnden und dabei auch hohen Temperaturdifferenzen ausgesetzt und müssen Schwingungen, sowie hohen Öldrücken standhalten. Für derartige Anwendungen werden nahezu ausschließlich Steckverbinder mit Rundstiften eingesetzt. Diese werden zumeist unter hohem Krafteinsatz in Durchgangsöffnungen eines Kunststoffkörpers eingepresst, die ein Untermass gegenüber dem Querschnittsmaß der Rundstifte aufweisen.Challenging environmental conditions are given for example in connectors that are installed in gearboxes of motor vehicles. Such connectors are subject to changing and also high temperature differences and must withstand vibrations and high oil pressures. For such applications almost exclusively plug connectors are used with round pins. These are usually pressed with high force into through holes of a plastic body, which have an undersize with respect to the cross-sectional dimension of the round pins.

Ein derartiges Vorgehen hat sich bei Flachkontakten als problematisch erwiesen, da die Anpresskräfte innerhalb der Durchgangsöffnung nicht symmetrisch auf die Oberfläche des Steckerkontakts wirken. Als besonders schwierig hat sich dabei die Abdichtung im Bereich der Längskanten eines Flachkontakts herausgestellt, da sich hier die Richtung der Oberflächennormale unstetig ändert. Dies führt dazu, dass eine ausreichende Öldichtigkeit von Getriebegehäusesteckverbindern mit Flachkontakten in den typischen Temperatur- und Druckbereichen bisher nicht erreichbar war.Such a procedure has proved to be problematic in flat contacts, since the contact forces within the passage opening do not act symmetrically on the surface of the plug contact. The sealing in the region of the longitudinal edges of a flat contact has proved to be particularly difficult, since the direction of the surface normal changes discontinuously here. As a result, sufficient oil-tightness of gear housing connectors with flat contacts in the typical temperature and pressure ranges has not been achievable so far.

Es stellte sich die Aufgabe der Erfindung, einen gattungsgemäßen Steckverbinder mit Flachkontakten zu schaffen, der bei hohen Drücken und Temperaturen sowie auch über einen großen Temperaturbereich fluiddicht und darüber hinaus möglichst vibrations- und chemikalienbeständig ist.It was an object of the invention to provide a generic connector with flat contacts, which is fluid-tight at high pressures and temperatures as well as over a wide temperature range and beyond as possible resistant to vibration and chemicals.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass der Kunststoffkörper aus einem nichtschwindenden Duroplastmaterial besteht, dass die Längskanten des mindestens einen Flachkontakts verrundet sind, und dass die Querschnittsänderungen durch Ausnehmungen ausgeführt sind.This object is achieved in that the plastic body consists of a non-shrinking Duroplastmaterial that the longitudinal edges of the at least one flat contact are rounded, and that the cross-sectional changes are performed by recesses.

Die Lösung der Aufgabe besteht somit aus der Kombination eines besonders gewählten Umspritzungsmaterials mit einer besonderen Formgebung des Flachkontakts. Diese Merkmale zusammen ermöglichen, eine Kontaktdurchführung die mindestens fluiddicht ist und die, für einen definierten Druckbereich, sogar gasdicht ausgebildet sein kann.The solution of the problem thus consists of the combination of a specially selected Umspritzungsmaterials with a special shape of the flat contact. Together these features allow a contact bushing which is at least fluid-tight and which, for a defined pressure range, may even be gas-tight.

Wesentlich ist hierbei zunächst die Verwendung eines Duroplastmaterials zur Umspritzung des mindestens einen Flachkontakts. Im Gegensatz zu den üblicherweise zum Spritzgießen verwendeten Thermoplasten finden sich unter den Duroplasten Materialien, welche ihr Volumen beim Aushärten nicht verringern, sondern konstant halten oder sogar vergrößern. Als für die hier zu lösende Aufgabe haben sich nichtschwindende Duroplastmaterialien, die auch als "Nullschwinder" bezeichnet werden, die ihr Volumen weder vermindern noch vergrößern, als geeignet erwiesen. Derartige Materialien finden sich beispielsweise in den Stoffgruppen der Epoxydharze, Phenolharze oder der so genannten Bulk Moulding Compounds (BMC). Die Verwendung eines nichtschwindenden Duroplastmaterials ermöglicht es, einen Flachkontakt zu umspritzen, ohne dass es beim Aushärten des Umspritzungsmaterials zu einer Ausbildung von Kavitäten kommt.Essential here is first the use of a thermoset material for encapsulation of the at least one flat contact. In contrast to the thermoplastics commonly used for injection molding can be found below Duroplast materials, which do not reduce their volume during curing, but keep constant or even increase. As for the problem to be solved here, non-shrinking thermoset materials, which are also referred to as "zero-decayers", which neither reduce nor increase their volume, have proven suitable. Such materials are found, for example, in the substance groups of epoxy resins, phenolic resins or the so-called bulk molding compounds (BMC). The use of a non-shrinking thermoset material makes it possible to overmold a flat contact without the formation of cavities during curing of Umspritzungsmaterials.

Um eine gleichmäßige Verbindung zwischen dem Duroplastmaterial und dem Flachkontakt zu gewährleisten, ist zudem vorgesehen, die Längskanten des mindestens einen Flachkontakts zu verrunden.In order to ensure a uniform connection between the thermoset material and the flat contact, it is also provided to round the longitudinal edges of the at least one flat contact.

Dies kann vorteilhaft dadurch erreicht werden, dass die Längskanten des mindestens einen Flachkontakts auf der Gratseite durch einen Stanzprozess vorgeprägt und dadurch umlaufend verrundet sind. Der Flachkontakt weist somit keinen genau rechteckförmigen Querschnitt auf, sondern einen rechteckförmigen Querschnitt mit abgerundeten Übergängen zwischen den Querschnittsseiten. Dieses Profil ist schematisch in der Figur 5 dargestellt. Der mindestens eine Flachkontakt weist zudem auf einem umspritzten Teilstück an seinen Randabschnitten eine oder mehrere rechteckförmige oder abgerundete Aussparungen aus, wie sie beispielhaft in den Figuren 3 und 4 dargestellt sind. Hierdurch variiert die Querschnittsbreite des Flachkontakts in dessen axialer Richtung.This can be advantageously achieved in that the longitudinal edges of the at least one flat contact on the ridge side are pre-stamped by a punching process and thereby rounded circumferentially. The flat contact thus has no exactly rectangular cross-section, but a rectangular cross-section with rounded transitions between the cross-sectional sides. This profile is schematic in the FIG. 5 shown. The at least one flat contact also has on a molded portion at its edge portions of one or more rectangular or rounded recesses, as exemplified in the FIGS. 3 and 4 are shown. As a result, the cross-sectional width of the flat contact varies in its axial direction.

Die Ausnehmungen bewirken, dass der mindestens eine Flachkontakt nach der Umspritzung formschlüssig mit dem Umspritzungsmaterial verbunden ist. Die Ausnehmungen bilden zudem in axialer Richtung des Flachkontakts eine Labyrinthstruktur aus, welche für das angrenzende Medium einen mehrstufigen Druckabfall bewirkt, wodurch sich die Abdichteigenschaften der Kontaktdurchführung weiter verbessern. Hierbei wirkt unterstützend, dass das Umspritzungsmaterial erfindungsgemäß bei der Verarbeitung sein Materialvolumen nicht verändert und daher die Ausnehmungen dicht ausfüllt.The recesses cause the at least one flat contact after the encapsulation is positively connected to the Umspritzungsmaterial. The recesses also form in the axial direction of the flat contact a labyrinth structure, which for the adjacent medium a causes multi-stage pressure drop, which further improves the sealing properties of the contact bushing. In this case, it is supportive that the overmolding material according to the invention does not change its material volume during processing and therefore fills the recesses tightly.

Besonders vorteilhaft ist es, wenn der mindestens eine Flachkontakt und das Umspritzungsmaterial möglichst ähnliche und im Idealfall gleiche Temperaturausdehnungskoeffizienten aufweisen. Hierdurch können in einem weiten Temperaturbereich sowohl mechanische Spannungen als auch Kavitätsbildungen, welche die Abdichtungseigenschaften verschlechtern würden, vermieden werden.It is particularly advantageous if the at least one flat contact and the overmolding material have as similar as possible and ideally the same temperature expansion coefficients. As a result, both mechanical stresses and cavity formations, which would impair the sealing properties, can be avoided over a wide temperature range.

Die Materialverbindung zwischen dem mindestens einen Flachkontakt und dem durch die Umspritzung gebildeten Kunststoffkörper kann durch Applizierung eines Haftvermittlers weiter verbessert werden.The material connection between the at least one flat contact and the plastic body formed by the encapsulation can be further improved by applying a bonding agent.

Besonders vorteilhaft ist auch, dass aufgrund der guten Abdichteigenschaften und der hohen Temperaturbeständigkeit des nichtschwindenden Duroplastmaterials die nicht umspritzten Endabschnitte des mindestens einen Flachkontakts durch einen Galvanikprozess behandelt werden können, ohne dass die umspritzten Bereichen davon betroffen sind. Hierdurch können die umspritzten und die nicht umspritzten Bereiche des mindestens einen Flachkontakts mit unterschiedlichen galvanischen Beschichtungen versehen werden, die für den jeweiligen Bereich besonders günstige Eigenschaften aufweisen.It is also particularly advantageous that due to the good sealing properties and the high temperature resistance of the non-shrinking thermoset material, the non-encapsulated end portions of the at least one flat contact can be treated by a galvanic process, without the encapsulated areas are affected. As a result, the overmolded and non-overmolded regions of the at least one flat contact can be provided with different galvanic coatings, which have particularly favorable properties for the respective region.

So kann beispielsweise vorteilhaft vorgesehen sein, dass ausschließlich die nicht umspritzten Bereiche des mindestens einen Flachkontakts eine Zinn- oder Silberbeschichtung aufweisen.For example, it may be advantageously provided that only the non-overmolded regions of the at least one flat contact have a tin or silver coating.

Hierzu können im Fertigungsablauf zuerst die nicht oberflächenbehandelten und gegebenenfalls mit einem Anlaufschutz versehenden Flachkontakte umspritzt werden, und anschließend die aus dem Kunststoffkörper herausstehenden Enden der Flachkontakte oberflächenbehandelt und gegebenenfalls passiviert werden. Da hierdurch nur Teilabschnitte der Flachstecker behandelt werden, wird zudem vorteilhaft eine Einsparung von Silber und Passivierungsmittel erreicht.For this purpose, the non-surface-treated and optionally provided with a tarnish protection flat contacts can be encapsulated in the production process first, and then the surfaces protruding from the plastic body ends of the flat contacts surface-treated and optionally passivated. Since this only partial sections of the tabs are treated, a savings of silver and passivation is also advantageously achieved.

Weitere Details zur vorteilhaften Ausgestaltungen einer erfindungsgemäßen Kontaktdurchführung gehen aus der nachfolgend beschriebenen Zeichnung hervor. Die Figur 1 zeigt eine Schnittansicht eines Steckverbindergehäuses 6, welches eine fluiddichte Durchführung von Flachkontakten 1 zwischen zwei Kammern 9, 10 aufweist. Das Steckverbindergehäuse 6 ist als ein Spritzgießteil gefertigt, wobei zur Herstellung des Steckverbindergehäuses 6 Teilabschnitte 4 der Flachkontakte 1 mit einem nichtschwindenden Duroplastmaterial umspritzt wurden.Further details of the advantageous embodiments of a contact bushing according to the invention will be apparent from the drawing described below. The FIG. 1 shows a sectional view of a connector housing 6, which has a fluid-tight passage of flat contacts 1 between two chambers 9, 10. The connector housing 6 is made as an injection molded part, wherein for the production of the connector housing 6 sections 4 of the flat contacts 1 were encapsulated with a non-shrinking Duroplastmaterial.

Die in der Figur 1 dargestellte zweipolige Ausführung einer Kontaktdurchführung ist rein selbstverständlich beispielhaft. Eine erfindungsgemäße Kontaktdurchführung kann eine frei festlegbare Anzahl von umspritzten Flachkontakten 1 aufweisen, insbesondere sind auch Kontaktdurchführungen mit jeweils einem einzigen Flachkontakt 1 oder auch mit einer höheren Anzahl von Flachkontakten 1 ausführbar. Die Figur 2 zeigt als weiteres Beispiel eine Kontaktdurchführung mit sieben Flachkontakten 1, die in drei zueinander parallelen Reihen angeordnet sind.The in the FIG. 1 shown two-pole version of a contact bushing is purely natural example. A contact feedthrough according to the invention can have a freely definable number of molded flat contacts 1, in particular also contact feedthroughs each with a single flat contact 1 or else with a higher number of flat contacts 1 can be executed. The FIG. 2 shows a further example, a contact bushing with seven flat contacts 1, which are arranged in three mutually parallel rows.

In der Figuren 3 und 4 ist jeweils ein einzelner Flachkontakt 1, 1' dargestellt, welcher an einem Teilstück 4 von einer Umspritzung 3 umgeben ist. Die als schraffierte Fläche dargestellte Umspritzung 3 verdeutlicht hierbei schematisch jeweils ein den Flachstecker 1, 1' direkt umgebendes Teilvolumen eines Kunststoffkörper 2, wie er in den Figuren 1 bzw. 2 gezeigt ist.In the FIGS. 3 and 4 in each case a single flat contact 1, 1 'is shown, which is surrounded on a section 4 by an encapsulation 3. The encapsulation 3 shown as a hatched area here illustrates schematically in each case a flat plug 1, 1 'directly surrounding Partial volume of a plastic body 2, as in the FIGS. 1 or 2 is shown.

Innerhalb des von der Umspritzung 3 umgebenen Teilstückes 4 weist der Flachkontakt 1, 1' mehrere Querschnittsänderungen auf, die in Form abgerundeter Ausnehmungen 5a (Figur 3) beziehungsweise rechteckförmiger Ausnehmungen 5b (Figur 4) in die Längsseiten des Flachkontakts 1 bzw. 1' eingebracht sind. Die Umspritzung 3 bildet mit den Ausnehmungen 5a bzw. 5b eine formschlüssige Verbindung aus, welche aufgrund der "Nullschwinder-Eigenschaften des dazu vorgesehen Duroplastmaterials in einem weiten Temperatur- und Druckbereich fluiddicht ist.Within the section 4 surrounded by the encapsulation 3, the flat contact 1, 1 'has a plurality of cross-sectional changes, which are in the form of rounded recesses 5a (FIG. FIG. 3 ) or rectangular recesses 5b (FIG. FIG. 4 ) are introduced into the longitudinal sides of the flat contact 1 or 1 '. The encapsulation 3 forms a positive connection with the recesses 5a and 5b, which is fluid-tight in a wide temperature and pressure range due to the zero-deceleration properties of the thermoset material provided for this purpose.

Noch nach dem Umspritzungsvorgang können nicht umspritzte Endabschnitte 7a, 7b des Flachkontaktes 1, 1' galvanisch behandelt werden; beispielsweise zu Verbesserung der elektrischen Kontakteigenschaften mit einer Silbersbeschichtung versehen werden.Even after the encapsulation process, non-encapsulated end sections 7a, 7b of the flat contact 1, 1 'can be treated galvanically; For example, to improve the electrical contact properties are provided with a silver coating.

Die Figur 5 zeigt einen Abschnitt aus dem in der Figur 4 dargestellten Flachkontakt 1' in einer Querschnittsansicht. Ersichtlich ist eine der Aussparungen 5b, durch die die Querschnittsbreite b des Flachkontakts 1' in dessen axialer Richtung a variiert. Erkennbar sind außerdem abgerundete Längskanten 8 des Flachkontakts 1', welche auf der Stanzseite durch das Stanzwerkzeug und auf der Gratseite durch eine Vorprägung an den Flachkontakt 1' angeformt sind. Die abgerundete Längskanten 8 verbessern wesentlich die Verbindung des Flachkontakts 1' zum Umspritzungsmaterial.The FIG. 5 shows a section from the in the FIG. 4 illustrated flat contact 1 'in a cross-sectional view. One of the recesses 5b is visible, through which the cross-sectional width b of the flat contact 1 'varies in its axial direction a. Visible are also rounded longitudinal edges 8 of the flat contact 1 ', which are formed on the punching side by the punching tool and on the ridge side by a pre-stamping to the flat contact 1'. The rounded longitudinal edges 8 substantially improve the connection of the flat contact 1 'to Umspritzungsmaterial.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1, 1'1, 1 '
Flachkontaktflat contact
22
KunststoffkörperPlastic body
33
Umspritzungencapsulation
44
umspritztes Teilstückovermolded section
5a5a
(abgerundete) Ausnehmungen(rounded) recesses
5b5b
(rechteckförmige) Ausnehmungen(rectangular) recesses
66
Steckverbindergehäuseconnector housing
7a, 7b7a, 7b
Endabschnitteend
88th
Längskantenlongitudinal edges
9, 109, 10
Kammernchambers
aa
axiale Richtungaxial direction
bb
QuerschnittsbreiteSection width

Claims (9)

  1. Liquid-tight contact bushing through a plastic body (2), having at least one flat contact (1, 1') showing one or a plurality of cross-sectional changes on an over-moulded section (4),
    characterised in that
    the plastic body (2) is composed of a non-diminishing Duroplast material,
    that the longitudinal edges (8) of the at least one flat contact (1, 1') are rounded, and
    that the cross-sectional changes are accomplished through recesses (5a, 5b).
  2. Liquid-tight contact bushing according to Claim 1, characterised in that the at least one flat contact (1, 1') and the plastic body (2) have the same thermal expansion coefficients.
  3. Liquid-tight contact bushing according to Claim 1, characterised in that a bonding agent is introduced between the at least one flat contact (1, 1') and the plastic body (2).
  4. Liquid-tight contact bushing according to Claim 1, characterised in that the plastic body (2) forms a connector housing (6).
  5. Liquid-tight contact bushing according to Claim 4, characterised in that the contact bushing forms a multi-pole plug-type connector.
  6. Liquid-tight contact bushing according to Claim 1, characterised in that the non-over-moulded end sections (7a, 7b) of the at least one flat contact (1, 1') are treated by a galvanic process.
  7. Liquid-tight contact bushing according to Claim 1 or Claim 6, characterised in that the at least one flat contact (1, 1') has a tin or silver coating.
  8. Liquid-tight contact bushing according to Claim 1, characterised in that the longitudinal edges (8) of the at least one flat contact (1, 1') are pre-shaped on the burr side by a punching process and are thus circumferentially rounded.
  9. Liquid-tight contact bushing according to Claim 1, characterised in that the plastic body (2) is composed of an epoxy resin, a phenolic resin or a bulk moulding compound with zero-shrinkage properties.
EP12809669.0A 2011-12-13 2012-12-10 Fluid-tight via Not-in-force EP2792029B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011121133A DE102011121133A1 (en) 2011-12-13 2011-12-13 Fluid-tight contact feedthrough
PCT/EP2012/074973 WO2013087576A1 (en) 2011-12-13 2012-12-10 Fluid-tight via

Publications (2)

Publication Number Publication Date
EP2792029A1 EP2792029A1 (en) 2014-10-22
EP2792029B1 true EP2792029B1 (en) 2019-01-09

Family

ID=47501121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12809669.0A Not-in-force EP2792029B1 (en) 2011-12-13 2012-12-10 Fluid-tight via

Country Status (11)

Country Link
US (1) US9337569B2 (en)
EP (1) EP2792029B1 (en)
JP (1) JP6112737B2 (en)
KR (1) KR101901481B1 (en)
CN (1) CN103988373B (en)
BR (1) BR112014014214A2 (en)
DE (1) DE102011121133A1 (en)
ES (1) ES2718837T3 (en)
MX (1) MX353679B (en)
RU (1) RU2586886C2 (en)
WO (1) WO2013087576A1 (en)

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Also Published As

Publication number Publication date
RU2014128562A (en) 2016-02-10
DE102011121133A1 (en) 2013-06-13
KR101901481B1 (en) 2018-09-21
US9337569B2 (en) 2016-05-10
JP2015500156A (en) 2015-01-05
CN103988373A (en) 2014-08-13
BR112014014214A2 (en) 2017-06-13
ES2718837T3 (en) 2019-07-04
KR20140104422A (en) 2014-08-28
EP2792029A1 (en) 2014-10-22
CN103988373B (en) 2017-07-14
US20140256167A1 (en) 2014-09-11
WO2013087576A1 (en) 2013-06-20
MX2014007064A (en) 2015-03-03
MX353679B (en) 2018-01-23
JP6112737B2 (en) 2017-04-12
RU2586886C2 (en) 2016-06-10

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