EP0164313B1 - Pole body for an electric igniter, method for its manufacture and its application - Google Patents

Pole body for an electric igniter, method for its manufacture and its application Download PDF

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Publication number
EP0164313B1
EP0164313B1 EP85810229A EP85810229A EP0164313B1 EP 0164313 B1 EP0164313 B1 EP 0164313B1 EP 85810229 A EP85810229 A EP 85810229A EP 85810229 A EP85810229 A EP 85810229A EP 0164313 B1 EP0164313 B1 EP 0164313B1
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EP
European Patent Office
Prior art keywords
carrier element
pole body
metallic layer
metal layer
elevation
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Expired
Application number
EP85810229A
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German (de)
French (fr)
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EP0164313A1 (en
Inventor
Alfred Wittwer
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Uhde Inventa Fischer AG
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EMS Inventa AG
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Publication date
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Priority to AT85810229T priority Critical patent/ATE30959T1/en
Publication of EP0164313A1 publication Critical patent/EP0164313A1/en
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Publication of EP0164313B1 publication Critical patent/EP0164313B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C11/00—Combinations of two or more stoves or ranges, e.g. each having a different kind of energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/12—Primers; Detonators electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C11/00—Electric fuzes

Definitions

  • the invention relates to a pole body for an electrical ignition device, consisting of an insulating carrier element on which a metal layer forms at least one ignition bridge, a method for its production and its use.
  • Pole bodies for electrical ignition devices of the type described at the outset are known (DE-A-2 840 738).
  • both poles protrude into a conductive metal layer, the one pole being surrounded by a metal layer with an insulating cutout in contact with the initial explosive.
  • a flat metal surface acts as an ignition bridge between the ends of the spiral recess.
  • Such cutouts are generated in a simple manner by means of a laser beam.
  • An electrical ignition device is also known (DE-A-2 816 300), in which an ignition bridge is attached to a flat metal surface through a circular recess.
  • Thin ignition bridges of this type have generally proven themselves well for electrical detonators with extremely short ignition times, but have the disadvantage that their manufacture by the use of laser beams, caused by the costly equipment required, is extremely complex. The laser beam generating devices also require careful maintenance.
  • the object of the invention is to provide a pole body which can be economically produced in large numbers without the need for complex engravings in a metal layer to produce insulation and to form an ignition bridge.
  • the other task is to provide a fully combustible igniter. It is also the task of creating a method for producing this pole body.
  • the above-mentioned object is achieved in that the insulating carrier element projects partially into the metal layer and forms a plane with the surface of the metal layer.
  • the simplest version of the polar body consists of a carrier element and a metal layer.
  • the carrier element isolates the conductive layer from the parts that protrude into the metal layer and just terminate with it.
  • the carrier element is provided on both sides with a closed annular elevation on one side and with another open elevation on the other side, which is interrupted by at least one ignition bridge. These elevations form a unit with the carrier element and are frustoconical in the finished pole body.
  • the open elevation is of spiral design and a bridge is provided between its ends.
  • An ignition bridge forms approximately parallel between the ends of the elevation.
  • the carrier element is provided with a shoulder on the edge. This paragraph facilitates the installation of the pole body in an electrical ignition device, for example by simply clamping it in the corresponding recess in the ignition device.
  • the carrier element is provided with a central bore and at least two edge bores.
  • the electrical connections can expediently be fastened in these bores.
  • the carrier element is made of a homogeneous plastic part. This is done using a plastic that is easy to process by injection molding, has chemical resistance and can withstand higher temperatures.
  • the following are preferably suitable as plastics for the carrier element of the pole body according to the invention: polyamides, polycarbonates, polyoximethylenes, polytetrafluoroethylenes, polyurethanes, epoxy resins, urea-formandehyde resins, crosslinked polyethylenes, in particular filled polyamides or epoxy resins.
  • pole body is completely combustible.
  • plastics have the advantage that they burn completely in practice in a primer.
  • the carrier element provided with a central bore and at least two edge bores made of plastic in a first process step on the side with a closed annular elevation with a wedge-shaped profile and on the other side with an open elevation coated with at least one metal layer and the bores are coated through and that in a second process step the tips of the elevations are removed up to the level of the metal layer.
  • the elevations can deviate from a constant arch shape and can be zigzag, wavy or meandering. It is advantageous and particularly economical to produce the polar body in only two main process steps.
  • the metal layer is applied mechanically and / or chemically and / or by vapor deposition in a high vacuum to the carrier element. This creates thin, electrically conductive and mechanically strong layers.
  • a metal layer is first vapor-deposited in a high vacuum, a metal layer is chemically deposited thereon and another metal layer is vapor-deposited.
  • the surveys by melting and / or abrasion fen can be removed.
  • the melting and / or grinding removes the elevations down to the level of the metal layer. This creates clean surfaces that have the required precision in the micrometer range.
  • the pole body is particularly suitable for use in electrical ignition devices for initiating ammunition bodies, projectiles, rockets, explosive devices and shaped charges.
  • a pole body is designated by 1. It consists of a carrier element 2 made of plastic, which has on one side a truncated cone-shaped elevation 3, which in the simplest case forms a circular ring. However, this elevation 3 can also have a different geometry, but must be closed.
  • the outer circumference of the carrier element 2 is provided with a shoulder 4.
  • the opposite side has an elevation 5 of the same type which is smaller in diameter, but which is not closed into a ring.
  • a central hole 6 and one or more holes 7, 7 ' are made in the carrier element 2.
  • the pole body 1 is plated over its entire surface, also in the interior of the bores 6, 7, 7 ', with a metal layer 8, which as a rule consists of several layers.
  • the electrical connections x, y can be made both in the bores 6 and 7, or 7 ', and as alternative connections v, w on the metal layer at the points indicated.
  • the shoulder 4 of the carrier element 2 forms a peripheral flange and is used for fastening in an ignition device.
  • FIG 3 shows the bottom view of the pole body 1 with an ignition bridge 9.
  • the ignition bridge 9 is formed between the ends as a recess in an annular elevation 5 present in the carrier element 2.
  • the elevation 5 ' is interrupted by a plurality of ignition bridges 9', four ignition bridges 9 'being shown, for example.
  • an ignition bridge 9 "lies between the ends of a spiral elevation 5".
  • FIG. 6 shows the unprocessed carrier element 2 with the conical upper elevations 3, the igniter-side elevations 5 and the shoulder 4 as it is removed from the injection mold as a blank.
  • the elevations 3, 5 are provided with tips 30 and 50.
  • the carrier element 2 described in FIG. 6 is coated with a metal layer 8, for example by vapor deposition in a high vacuum, both on its surfaces and inside the bores 6, 7, 7 '.
  • a metal layer 8 for example by vapor deposition in a high vacuum, both on its surfaces and inside the bores 6, 7, 7 '.
  • Suitable as metals are individually or as alloys: Ni, Cr, Al, Pd, Ta, Mn, Ba, Ti, Re, Au.
  • a further metal layer made of Ag or Au in the range from 1 to 50 ⁇ m is applied chemically.
  • a further layer can be evaporated in a known manner with the metals mentioned in a high vacuum.
  • both sides are preferably leveled simultaneously by melting or grinding.
  • a metallic surface is obtained which is only separated by the insulating plastic surface and which represents the desired ignition bridge 9.
  • the pole body 1 according to the invention has the advantage that, due to the gapless connection between the insulating support element 2 and the conductive part of the metal layers 8, it is very simple in construction, compact, stable and yet practically completely combustible, can be easily installed in an ignition device and in large quantities can be produced economically.
  • the pole body 1 is suitable for use in electrical ignition devices of all kinds, in particular for ammunition bodies.

Abstract

The pole body contains an insulating carrier element made of plastic and provided with elevations on one side and on an other side of the insulating carrier element. The elevation on the other side partially protrudes into a metal layer applied to the insulating carrier element and conjointly therewith forms a planar surface forming the two poles of the fuze. The pole body is manufactured by applying the metal layer to the insulating carrier element which is provided with wedge-shaped elevations. Subsequently, the tips or ridges of the elevations are removed to such an extent that planes including the metal layer are formed. One of the elevations constitutes an interrupted elevation and a number of detonating bridges is formed, depending on the number of interruptions in the elevation between the ends of the elevation bounded by the interruptions thereof. The pole body is used in electric fuze devices which have a reaction time in the microsecond range and thus are suited for use with ammunition.

Description

Die Erfindung betrifft einen Polkörper für eine elektrische Zündvorrichtung, bestehend aus einem isolierenden Trägerelement, auf welchem eine Metallschicht wenigstens eine Zündbrücke bildet, ein Verfahren zu dessen Herstellung und dessen Verwendung.The invention relates to a pole body for an electrical ignition device, consisting of an insulating carrier element on which a metal layer forms at least one ignition bridge, a method for its production and its use.

Polkörper für elektrische Zündvorrichtungen der eingangs geschilderten Art sind bekannt (DE-A-2 840 738). In dieser Ausführung ragen beide Pole in eine leitende Metallschicht, wobei der eine Pol durch einen in die mit dem Initialsprengstoff in Berührung stehende Metallschicht mit einer isolierenden Aussparung umgeben ist. Zwischen den Enden der spiralförmigen Aussparung wirkt eine ebene Metallfläche als Zündbrücke. Solche Aussparungen werden in einfacher Weise mittels eines Laserstrahls erzeugt.Pole bodies for electrical ignition devices of the type described at the outset are known (DE-A-2 840 738). In this embodiment, both poles protrude into a conductive metal layer, the one pole being surrounded by a metal layer with an insulating cutout in contact with the initial explosive. A flat metal surface acts as an ignition bridge between the ends of the spiral recess. Such cutouts are generated in a simple manner by means of a laser beam.

Es ist auch eine elektrische Zündvorrichtung bekannt (DE-A-2 816 300), in welcher eine Zündbrücke durch eine kreisförmige Aussparung auf einer ebenen Metallfläche angebracht ist.An electrical ignition device is also known (DE-A-2 816 300), in which an ignition bridge is attached to a flat metal surface through a circular recess.

Dünne Zündbrücken dieser Art haben sich im allgemeinen für elektrische Zünder mit extrem kurzen Zündzeiten gut bewährt, haben jedoch den Nachteil, dass ihre Herstellung durch den Einsatz von Laserstrahlen, verursacht durch die erforderlichen kostspieligen Einrichtungen, ausserordentlich aufwendig ist. Die Laserstrahlen erzeugenden Vorrichtungen bedürfen zusätzlich einer sorgfältigen Wartung.Thin ignition bridges of this type have generally proven themselves well for electrical detonators with extremely short ignition times, but have the disadvantage that their manufacture by the use of laser beams, caused by the costly equipment required, is extremely complex. The laser beam generating devices also require careful maintenance.

Aufgabe der Erfindung ist es, einen Polkörper zur Verfügung zu stellen, welcher in grossen Stückzahlen wirtschaftlich hergestellt werden kann, ohne dass aufwendige Gravuren in einer Metallschicht zur Erzeugung einer Isolierung und Bildung einer Zündbrücke erforderlich sind. Die weitere Aufgabe ist es, einen vollständig verbrennbaren Zünder zur Verfügung zu stellen. Es ist ebenfalls die Aufgabe, ein Verfahren zur Herstellung dieses Polkörpers zu schaffen.The object of the invention is to provide a pole body which can be economically produced in large numbers without the need for complex engravings in a metal layer to produce insulation and to form an ignition bridge. The other task is to provide a fully combustible igniter. It is also the task of creating a method for producing this pole body.

Die vorgenannte Aufgabe wird erfindungsgemäss dadurch gelöst, dass das isolierende Trägerelement partiell in die Metallschicht hineinragt und mit der Oberfläche der Metallschicht eine Ebene bildet.According to the invention, the above-mentioned object is achieved in that the insulating carrier element projects partially into the metal layer and forms a plane with the surface of the metal layer.

Der Polkörper besteht in seiner einfachsten Ausführung aus einem Trägerelement und einer Metallschicht. Das Trägerelement isoliert durch die Teile, die in die Metallschicht hineinragen und mit dieser eben abschliessen, die leitende Schicht.The simplest version of the polar body consists of a carrier element and a metal layer. The carrier element isolates the conductive layer from the parts that protrude into the metal layer and just terminate with it.

Nähere Ausgestaltungen der Erfindung ergeben sich aus den Kennzeichen der abhängigen Ansprüche.Further refinements of the invention result from the characteristics of the dependent claims.

Gemäss Anspruch 2 ist das Trägerelement beidseitig mit einer geschlossenen ringförmigen Erhebung auf der einen Seite und mit einer anderen offenen Erhebung auf der anderen Seite versehen, die durch wenigstens eine Zündbrücke unterbrochen ist. Diese Erhebungen bilden mit dem Trägerelement eine Einheit und sind im fertigen Polkörper kegelstumpfförmig ausgebildet. Das hat den Vorteil, dass der leitende Teil und der isolierende Teil des Polkörpers unlösbar miteinander verbunden sind und so dem Polkörper eine hohe Stabilität verleihen.According to claim 2, the carrier element is provided on both sides with a closed annular elevation on one side and with another open elevation on the other side, which is interrupted by at least one ignition bridge. These elevations form a unit with the carrier element and are frustoconical in the finished pole body. This has the advantage that the conductive part and the insulating part of the pole body are permanently connected to one another and thus give the pole body a high degree of stability.

In einer weiteren Ausgestaltung ist, gemäss Anspruch 3, die offene Erhebung spiralförmig ausgebildet und zwischen ihren Enden eine Brücke vorgesehen. Dabei bildet sich eine Zündbrücke etwa parallel zwischen den Enden der Erhebung.In a further embodiment, according to claim 3, the open elevation is of spiral design and a bridge is provided between its ends. An ignition bridge forms approximately parallel between the ends of the elevation.

Es ist zweckmässig, gemäss Anspruch 4, dass das Trägerelement randseitig miteinem Absatz versehen ist. Dieser Absatz erleichtert den Einbau des Polkörpers in eine elektrische Zündvorrichtung, beispielsweise durch einfaches Einklemmen in die entsprechende Ausnehmung der Zündvorrichtung.It is expedient, according to claim 4, that the carrier element is provided with a shoulder on the edge. This paragraph facilitates the installation of the pole body in an electrical ignition device, for example by simply clamping it in the corresponding recess in the ignition device.

Gemäss Anspruch 5 ist das Trägerelement mit einer zentralen Bohrung und wenigstens zwei Randbohrungen versehen. In diesen Bohrungen können zweckmässig die elektrischen Anschlüsse befestigt werden.According to claim 5, the carrier element is provided with a central bore and at least two edge bores. The electrical connections can expediently be fastened in these bores.

Es ist von Vorteil, gemäss Anspruch 6, wenn das Trägerelement aus einem homogenen Kunststoffteil gefertigt ist. Dazu dient ein Kunststoff, der leicht durch Spritzguss zu verarbeiten ist, chemische Beständigkeit aufweist und höhere Temperaturen aushält. Als Kunststoffe für das Trägerelement des erfindungsgemässen Polkörpers sind bevorzugt geeignet: Polyamide, Polycarbonate, Polyoximethylene, Polytetrafluorethylene, Polyurethane, Epoxidharze, Harnstoff- Formandehydharze, vernetzte Polyethylene, insbesondere gefüllte Polyamide oder Epoxidharze.It is advantageous, according to claim 6, if the carrier element is made of a homogeneous plastic part. This is done using a plastic that is easy to process by injection molding, has chemical resistance and can withstand higher temperatures. The following are preferably suitable as plastics for the carrier element of the pole body according to the invention: polyamides, polycarbonates, polyoximethylenes, polytetrafluoroethylenes, polyurethanes, epoxy resins, urea-formandehyde resins, crosslinked polyethylenes, in particular filled polyamides or epoxy resins.

Besonders von Vorteil ist es, gemäss Anspruch 7, wenn der Polkörper vollständig verbrennbar ist. Die vorgenannten Kunststoffe weisen den Vorteil auf, dass sie in praxi in einer Zündkapsel vollständig verbrennen.It is particularly advantageous, according to claim 7, if the pole body is completely combustible. The above-mentioned plastics have the advantage that they burn completely in practice in a primer.

Zur Herstellung des Polkörpers empfiehlt es sich, gemäss Anspruch 8, dass das mit einer zentralen Bohrung und wenigstens zwei Randbohrungen versehene Trägerelement aus Kunststoff in einem ersten Verfahrensschritt auf der Seite mit einer geschlossenen ringförmigen Erhebung mit keilförmigem Profil und auf der anderen Seite mit einer offenen Erhebung mit wenigstens einer Metallschicht beschichtet und die Bohrungen durchbeschichtet werden und dass in einem zweiten Verfahrensschritt die Spitzen der Erhebungen bis zur Ebene der Metallschicht entfernt werden. Die Erhebungen können von einer stetigen Bogenform abweichen und zickzackförmig, wellenförmig oder meanderförmig gestaltet sein. Es ist von Vorteil und besonders wirtschaftlich, den Polkörper in nur zwei Hauptverfahrensschritten herzustellen.For the manufacture of the pole body, it is recommended, according to claim 8, that the carrier element provided with a central bore and at least two edge bores made of plastic in a first process step on the side with a closed annular elevation with a wedge-shaped profile and on the other side with an open elevation coated with at least one metal layer and the bores are coated through and that in a second process step the tips of the elevations are removed up to the level of the metal layer. The elevations can deviate from a constant arch shape and can be zigzag, wavy or meandering. It is advantageous and particularly economical to produce the polar body in only two main process steps.

Gemäss Anspruch 9 ist es zweckmässig, wenn die Metallschicht mechanisch und/oder chemisch und/ oder durch Bedampfen im Hochvakuum auf das Trägerelement aufgebracht wird. Somit entstehen gut elektrisch leitende und mechanisch feste dünne Schichten. In einer bevorzugten Ausführungsform wird zuerst eine Metallschicht im Hochvakuum aufgedampft, darauf eine Metallschicht chemisch abgeschieden und nochmals eine Metallschicht aufgedampft.According to claim 9, it is expedient if the metal layer is applied mechanically and / or chemically and / or by vapor deposition in a high vacuum to the carrier element. This creates thin, electrically conductive and mechanically strong layers. In a preferred embodiment, a metal layer is first vapor-deposited in a high vacuum, a metal layer is chemically deposited thereon and another metal layer is vapor-deposited.

Es ist gemäss Anspruch 10 von Vorteil, wenn die Erhebungen auf beiden Seiten des Trägerelements gleichzeitig bis zur Ebene der Metallschicht entfernt werden. Dadurch wird ein Arbeitsgang eingespart.It is advantageous according to claim 10 if the elevations on both sides of the carrier element are removed simultaneously up to the level of the metal layer. This saves one operation.

Nach Anspruch 11 ist es zweckmässig, wenn die Erhebungen durch Abschmelzen und/oder Abschleifen entfernt werden. Das Abschmelzen und/oder Abschleifen entfernt die Erhebungen bis zur Ebene der Metallschicht. Dabei entstehen saubere Oberflächen, welche die erforderliche Präzision im Mikrometerbereich aufweisen.According to claim 11, it is useful if the surveys by melting and / or abrasion fen can be removed. The melting and / or grinding removes the elevations down to the level of the metal layer. This creates clean surfaces that have the required precision in the micrometer range.

Nach Anspruch 12 ist der Polkörper besonders zur Verwendung in elektrischen Zündvorrichtungen zur Initiierung von Munitionskörpern, Projektilen, Raketen, Sprengkörpern und Hohlladungen geeignet.According to claim 12, the pole body is particularly suitable for use in electrical ignition devices for initiating ammunition bodies, projectiles, rockets, explosive devices and shaped charges.

Der Erfindungsgegenstand wird anhand der Zeichnungen an einigen Beispielen näher erläutert.The subject matter of the invention is explained in more detail with the aid of the drawings using a few examples.

Es zeigen:

  • Fig. 1 einen erfindungsgemässen Polkörper im axialen Schnitt,
  • Fig. 2 eine Draufsicht auf den Polkörper nach Fig. 1,
  • Fig. 3 eine Unteransicht des Polkörpers nach Fig. 1,
  • Fig. 4 eine Variante mit mehreren Zündbrücken in der Unteransicht,
  • Fig. 5 eine weitere Variante mit einer spiralförmigen Erhebung und
  • Fig. 6 einen axialen Schnitt durch das unbeschichtete Trägerelement.
Show it:
  • 1 shows an inventive polar body in axial section,
  • 2 is a plan view of the pole body of FIG. 1,
  • 3 is a bottom view of the pole body of FIG. 1,
  • 4 shows a variant with several ignition bridges in the bottom view,
  • Fig. 5 shows another variant with a spiral elevation and
  • Fig. 6 shows an axial section through the uncoated carrier element.

Gemäss Fig. 1 ist ein Polkörper mit 1 bezeichnet. Er besteht aus einem Trägerelement 2 aus Kunststoff, welcher auf seiner einen Seite eine kegelstumpfförmige Erhebung 3 aufweist, die im einfachsten Fall einen Kreisring bildet. Diese Erhebung 3 kann aber auch eine andere Geometrie aufweisen, muss jedoch geschlossen sein. Der äussere Umfang des Trägerelements 2 ist mit einem Absatz 4 versehen. Die Gegenseite weist eine in ihrem Durchmesser kleinere Erhebung 5 gleicher Art auf, welche jedoch nicht zu einem Ring geschlossen ist. Im Trägerelement 2 sind eine zentrale Bohrung 6 und eine oder mehrere Bohrungen 7, 7' angebracht. Der Polkörper 1 ist auf seiner ganzen Oberfläche, auch im Innern der Bohrungen 6, 7, 7', mit einer Metallschicht 8 durchplattiert, welche in der Regel aus mehreren Schichten besteht. Die elektrischen Anschlüsse x, y können sowohl in den Bohrungen 6 und 7, bzw. 7', als auch als Alternativanschlüsse v, w an der Metallschicht an den bezeichneten Stellen angebracht werden.1, a pole body is designated by 1. It consists of a carrier element 2 made of plastic, which has on one side a truncated cone-shaped elevation 3, which in the simplest case forms a circular ring. However, this elevation 3 can also have a different geometry, but must be closed. The outer circumference of the carrier element 2 is provided with a shoulder 4. The opposite side has an elevation 5 of the same type which is smaller in diameter, but which is not closed into a ring. A central hole 6 and one or more holes 7, 7 'are made in the carrier element 2. The pole body 1 is plated over its entire surface, also in the interior of the bores 6, 7, 7 ', with a metal layer 8, which as a rule consists of several layers. The electrical connections x, y can be made both in the bores 6 and 7, or 7 ', and as alternative connections v, w on the metal layer at the points indicated.

In Fig. 2 ist in einer Draufsicht zwischen der zentralen Bohrung 6 und den Bohrungen 7, 7' die Oberfläche der Erhebung 3 im Trägerelement 2 dargestellt. Der Absatz 4 des Trägerelements 2 bildet einen peripheren Flansch und dient zur Befestigung in einer Zündvorrichtung.2 shows a top view between the central bore 6 and the bores 7, 7 'of the surface of the elevation 3 in the carrier element 2. The shoulder 4 of the carrier element 2 forms a peripheral flange and is used for fastening in an ignition device.

In Fig. 3 ist die Unteransicht des Polkörpers 1 mit einer Zündbrücke 9 dargestellt. Die Zündbrücke 9 ist zwischen den Enden als eine Aussparung in einer im Trägerelement 2 vorhandenen ringförmigen Erhebung 5 ausgebildet.3 shows the bottom view of the pole body 1 with an ignition bridge 9. The ignition bridge 9 is formed between the ends as a recess in an annular elevation 5 present in the carrier element 2.

In Fig. 4 ist die Erhebung 5' durch mehrere Zündbrücken 9' unterbrochen, wobei beispielsweise vier Zündbrücken 9' dargestellt sind.4, the elevation 5 'is interrupted by a plurality of ignition bridges 9', four ignition bridges 9 'being shown, for example.

In Fig. 5 liegt eine Zündbrücke 9" zwischen den Enden einer spiralförmigen Erhebung 5".5, an ignition bridge 9 "lies between the ends of a spiral elevation 5".

In Fig. 6 ist das unbearbeitete Trägerelement 2 mit den kegelförmigen oberen Erhebungen 3, den zündbrückenseitigen Erhebungen 5 und dem Absatz 4 dargestellt, wie er der Spritzgussform als Rohling entnommen wird. Die Erhebungen 3, 5 sind mit Spitzen 30 und 50 versehen.6 shows the unprocessed carrier element 2 with the conical upper elevations 3, the igniter-side elevations 5 and the shoulder 4 as it is removed from the injection mold as a blank. The elevations 3, 5 are provided with tips 30 and 50.

Zur Herstellung des Polkörpers wird das in Fig. 6 beschriebene Trägerelement 2 beispielsweise durch Bedampfen im Hochvakuum sowohl an seinen Oberflächen als auch innerhalb der Bohrungen 6, 7, 7' mit einer Metallschicht 8 durchbeschichtet. Als Metalle sind einzeln oder als Legierungen geeignet: Ni, Cr, Al, Pd, Ta, Mn, Ba, Ti, Re, Au. Nach dem Auftragen der Metallschicht 8 durch Bedampfen wird eine weitere Metallschicht aus Ag oder Au im Bereich von 1 bis 50 µm auf chemischem Weg aufgebracht. Es kann eine weitere Schicht in bekannter Weise mit den genannten Metallen im Hochvakuum aufgedampft werden.To produce the pole body, the carrier element 2 described in FIG. 6 is coated with a metal layer 8, for example by vapor deposition in a high vacuum, both on its surfaces and inside the bores 6, 7, 7 '. Suitable as metals are individually or as alloys: Ni, Cr, Al, Pd, Ta, Mn, Ba, Ti, Re, Au. After the metal layer 8 has been applied by vapor deposition, a further metal layer made of Ag or Au in the range from 1 to 50 μm is applied chemically. A further layer can be evaporated in a known manner with the metals mentioned in a high vacuum.

Nach dem Fertigstellen der Beschichtungen werden vorzugsweise beide Seiten gleichzeitig durch Abschmelzen oder Abschleifen eingeebnet. Dabei werden die Spitzen 30 bzw. 50 der Erhebungen 3 bzw. 5, 5', 5" entfernt. Man erhält eine metallische Oberfläche, die nur durch die isolierende Kunststoff-Oberfläche getrennt ist und die gewünschte Zündbrücke 9 darstellt.After the coatings have been finished, both sides are preferably leveled simultaneously by melting or grinding. The tips 30 and 50 of the elevations 3 and 5, 5 ', 5 "are removed. A metallic surface is obtained which is only separated by the insulating plastic surface and which represents the desired ignition bridge 9.

Der erfindungsgemässe Polkörper 1 hat den Vorteil, dass er durch die lückenlose Verbindung zwischen dem isolierenden Trägerelement 2 und dem leitenden Teil der Metallschichten 8 sehr einfach im Aufbau, kompakt, stabil und dennoch praktisch vollständig verbrennbar ist, leicht in eine Zündvorrichtung eingebaut werden kann und in grossen Stückzahlen wirtschaftlich herstellbar ist.The pole body 1 according to the invention has the advantage that, due to the gapless connection between the insulating support element 2 and the conductive part of the metal layers 8, it is very simple in construction, compact, stable and yet practically completely combustible, can be easily installed in an ignition device and in large quantities can be produced economically.

Der Polkörper 1 ist zur Verwendung in elektrischen Zündvorrichtungen aller Art, insbsondere für Munitionskörper, geeignet.The pole body 1 is suitable for use in electrical ignition devices of all kinds, in particular for ammunition bodies.

Claims (12)

1. A pole body (1) for an electrical ignitor, comprising an insulating carrier element (2), on which a metallic layer (8) forms at least one ignition bridge (9, 9', 9"), characterized in that the insulating carrier element (2) projects partially into the metallic layer (8) and forms one plane with the surface of the metallic layer (8) (Fig. 1).
2. A pole body according to Claim 1, characterized in that the carrier element (2) is provided with a closed annular raised portion (3) on one side and with another open raised portion (5, 5', 5") on the other side, which is interrupted by at least one ignition bridge (9, 9', 9") (Figs. 2, 3, 4).
3. A pole body according to Claim 2, characterized in that the open raised portion (5") is constructed as a spiral, and a bridge (9") is provided between its ends (Fig. 5).
4. A pole body according to Claim 1, characterized in that the carrier element (2) is provided on its edge with an attachment (4) (Fig. 1).
5. A pole body according to Claim 1, characterized in that the carrier element (2) is provided with a central bore (6) and at least two marginal bores (7, 7') (Fig. 1).
6. A pole body according to Claim 1, characterized in that the carrier element (2) is produced from a homogeneous plastics part (Fig. 6).
7. A pole body according to Claim 1, characterized in that it is completely combustible.
8. A method of producing a poly body (1) according to Claim 1, characterized in that the carrier element (2) provided with a central bore (6) and at least two marginal bores (7, 7') and produced from plastics is coated in a first method step with at least one metallic layer (8) on the side with a closed annular raised portion (3) with a wedge-shaped profile and on the other side with an open raised portion (5, 5', 5") and the bores (6, 7, 7') are thoroughly coated, and in a second method step the tips (30, 50) of the raised portions (3, 5, 5', 5") are removed as far as the plane of the metallic layer (8) (Fig. 6; Fig. 1).
9. A method according to Claim 8, characterized in that the metallic layer (8) is applied to the carrier element (2) mechanically and/or chemically and/or by vapour deposition in a high vacuum.
10. A method according to Claim 9, characterized in that the raised portions (3, 5, 5', 5") on both sides of the carrier element (2) are removed simultaneously as far as the plane of the metallic layer (8).
11. A method according to Claim 10, characterized in that the raised portions (3, 5, 5', 5") are removed by melting or grinding away.
12. The use of a pole body (1) according to Claims 1 to 8 in electrical ingitors for the priming of munitions, projectiles, rockets, explosive devices and hollow charges.
EP85810229A 1984-05-24 1985-05-15 Pole body for an electric igniter, method for its manufacture and its application Expired EP0164313B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85810229T ATE30959T1 (en) 1984-05-24 1985-05-15 POLE BODY FOR AN ELECTRIC TERMINAL DEVICE, PROCESS FOR ITS MANUFACTURE AND ITS USE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2548/84 1984-05-24
CH254884 1984-05-24

Publications (2)

Publication Number Publication Date
EP0164313A1 EP0164313A1 (en) 1985-12-11
EP0164313B1 true EP0164313B1 (en) 1987-11-19

Family

ID=4236269

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85810229A Expired EP0164313B1 (en) 1984-05-24 1985-05-15 Pole body for an electric igniter, method for its manufacture and its application

Country Status (7)

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US (1) US4715280A (en)
EP (1) EP0164313B1 (en)
JP (1) JPS612000A (en)
KR (1) KR850008216A (en)
AT (1) ATE30959T1 (en)
DE (1) DE3561027D1 (en)
ZA (1) ZA852777B (en)

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GB8905747D0 (en) * 1989-03-13 1989-04-26 Secr Defence Pyrotechnic material
US5266132A (en) * 1991-10-08 1993-11-30 The United States Of America As Represented By The United States Department Of Energy Energetic composites
US5912427A (en) * 1993-02-26 1999-06-15 Quantic Industries, Inc. Semiconductor bridge explosive device
US5505799A (en) * 1993-09-19 1996-04-09 Regents Of The University Of California Nanoengineered explosives
US6199484B1 (en) * 1997-01-06 2001-03-13 The Ensign-Bickford Company Voltage-protected semiconductor bridge igniter elements
JPH10253059A (en) * 1997-03-11 1998-09-25 Nikko Co Manufacture of circuit plate for explosive ignition heat generating tool
US6553911B1 (en) 1997-04-30 2003-04-29 Erico International Corporation Exothermic reactions and methods
US6598532B2 (en) * 2001-08-14 2003-07-29 Donald G. Gerard Electric circuit for an electrically dischargeable primer
CN100398248C (en) 2002-01-25 2008-07-02 爱瑞柯国际公司 Welding apparatus and method
WO2003087705A1 (en) * 2002-04-16 2003-10-23 Nippon Kayaku Kabushiki-Kaisha Gas generator

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BE632157A (en) * 1962-05-10
DE1771334A1 (en) * 1968-05-08 1971-12-16 Dynamit Nobel Ag Ignition body for electrical ignition
DE2020016C3 (en) * 1970-04-24 1974-12-12 Dynamit Nobel Ag, 5210 Troisdorf Metal film igniter
US3669022A (en) * 1970-08-05 1972-06-13 Iit Res Inst Thin film device
DE2245308C3 (en) * 1972-09-15 1981-05-07 Dynamit Nobel Ag, 5210 Troisdorf Electric bridge detonator
DE2443793C2 (en) * 1974-09-13 1986-05-07 Dynamit Nobel Ag, 5210 Troisdorf Combined primer cap
DE2551473C2 (en) * 1975-11-15 1983-10-20 Diehl GmbH & Co, 8500 Nürnberg Ignition element for ammunition
SE431681B (en) * 1977-04-19 1984-02-20 Bofors Ab ELTENDDON
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SE427216B (en) * 1979-09-03 1983-03-14 Bofors Ab ELTENDDON, PREPARED FOR ARTILLERY AMMUNITION
US4409262A (en) * 1982-02-01 1983-10-11 The United States Of America As Represented By The Secretary Of The Navy Fabrication of submicron-wide lines with shadow depositions
SE430723B (en) * 1982-04-30 1983-12-05 Bofors Ab PROCEDURE AND DEVICE FOR ASTADCOM A WELL-DEFINED AND ELECTRICALLY CONDUCTIVE BRIDGE BETWEEN TWO POLE CROPS
US4576094A (en) * 1985-08-28 1986-03-18 The United States Of America As Represented By The Secretary Of The Army Fabrication of expandable polystyrene plastic ignition containers

Also Published As

Publication number Publication date
ZA852777B (en) 1985-11-27
EP0164313A1 (en) 1985-12-11
KR850008216A (en) 1985-12-13
DE3561027D1 (en) 1987-12-23
JPS612000A (en) 1986-01-07
US4715280A (en) 1987-12-29
ATE30959T1 (en) 1987-12-15

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