EP1148313A2 - Electrothermal ignition device for an ammunition cartridge and its manufacturing process - Google Patents

Electrothermal ignition device for an ammunition cartridge and its manufacturing process Download PDF

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Publication number
EP1148313A2
EP1148313A2 EP01105851A EP01105851A EP1148313A2 EP 1148313 A2 EP1148313 A2 EP 1148313A2 EP 01105851 A EP01105851 A EP 01105851A EP 01105851 A EP01105851 A EP 01105851A EP 1148313 A2 EP1148313 A2 EP 1148313A2
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EP
European Patent Office
Prior art keywords
ignition
ignition device
wire
charge
electrically conductive
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.)
Granted
Application number
EP01105851A
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German (de)
French (fr)
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EP1148313B1 (en
EP1148313A3 (en
Inventor
Thomas Dr. Weise
Hans Karl Dr. Haak
Uwe Dr. Krone
Dirk Cegiel
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Rheinmetall W&M GmbH
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Rheinmetall W&M GmbH
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Publication of EP1148313A2 publication Critical patent/EP1148313A2/en
Publication of EP1148313A3 publication Critical patent/EP1148313A3/en
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Classifications

    • 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
    • F42C19/0811—Primers; Detonators characterised by the generation of a plasma for initiating the charge to be ignited
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B33/00—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
    • C06B33/08—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide with a nitrated organic compound
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
    • C06C9/00—Chemical contact igniters; Chemical lighters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/08—Cartridges, i.e. cases with charge and missile modified for electric ignition
    • 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
    • F42C19/0823—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition
    • F42C19/0834—Arrangements of a multiplicity of primers or detonators dispersed within a propellant charge for increased efficiency
    • 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
    • F42C19/0838—Primers or igniters for the initiation or the explosive charge in a warhead
    • 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

Definitions

  • the invention relates to an electrothermal igniter for igniting a Powder propellant.
  • the invention further relates to a method of manufacture such an igniter.
  • the wire-shaped conductor and first evaporates an arc plasma channel is created inside the respective propellant powder tubes.
  • the energy is transferred to the. Via the plasma channels via radiation transport mechanisms Environment. This release of energy leads to a rapid ignition of the propellant powder tubes and their implementation.
  • the resulting propellant gases of the propellant powder tubes and the released arc radiation a quick and even ignition of the surrounding propellant charge.
  • the object of the invention is an ignition device to be specified at which a reduced to ignite the powder propellant charge Need for electrical power is required, the beneficial properties the electrothermal ignition can still be used. Furthermore should a method for producing such an igniter are disclosed.
  • the invention is essentially based on the idea of not introducing the electrically conductive wire into a propellant charge powder tube, but rather to coat it with a pyrotechnic primer.
  • a mixture based on potassium perchlorate-zirconium (KClO 4 -Zr) has proven to be advantageous as an ignition charge.
  • This mixture is preferably a polymeric binder from the series of fluoroalkanes added, which causes the primer from a solvent emulsion Wires can be applied and after evaporation of the solvent firmly on the wire is liable.
  • the proportion of binder also gives the primer sticking to the wire elastic properties.
  • zirconium oxide (ZrO 2 ) is formed at temperatures around 4000 ° C, which, as fine hot spots, supports the ignition of the propellant charge powder and reduces the need for electrical energy.
  • Fig. 1 denotes a cartridge (e.g. for firing from an armored weapon), which is connected to a current source 3 for ignition via a switch 2.
  • a current source 3 for ignition via a switch 2.
  • the corresponding The weapon in which the cartridge 1 is located is not for reasons of clarity shown.
  • the cartridge 1 comprises a sleeve 5 filled with a propellant charge 4 and a propellant charge sleeve 5 bottom-closing sleeve bottom 6.
  • the combustible sleeve 5 is in Area of its end 7 on the sleeve bottom in a form-fitting manner between an insulating molded part 8 and the sleeve bottom 6 fixed.
  • a high-voltage electrode which is electrically insulated from it 9 arranged, which passed through the molded insulating part 8 and with a Metal disc 10 is connected.
  • an electrically conductive wire 11 with a homogeneous over its length Fixed diameter, which is coated with an ignition charge 12 (Fig.2). in the Area of the sleeve cover 13 of the propellant charge sleeve 5 is the wire 11 with an annular Contact part 14 connected, which in turn is the inner wall at ground potential contacted the weapon, not shown.
  • the switch 2 is closed and the one with a row current source 3 equipped with charged capacitors (at a voltage of up to 40 unloaded suddenly.
  • the resulting discharge current leads to an explosive Vaporizing the wire 11 and initiating an arc plasma all over Length of wire.
  • the interaction of the arc plasma with the Ignition charge 12 is initiated over the entire length of the coating 12 and the resulting pyrotechnic particles are in the propellant charge 4th hurled in.
  • FIG. 3 shows the structure of an arc-introducing wire 15 with an inhomogeneous diameter, which is coated with an ignition charge 16.
  • an ignition charge 16 When initiating a corresponding high current in the wire 15, this is initially in the areas 17 with low Diameter evaporated explosively. In these areas, therefore, begins first the formation of arc plasmas and their interaction with the primer 16. Arc plasmas are then formed in regions 18 at different times of the wire 15, which have a larger diameter. About the wire thickness and / or The desired time delay in the generation of the plasmas can be determined via the current profiles be set in the propellant charge. About the distances of the wire inhomogeneities can a corresponding spatial distribution of the plasmas are generated.
  • FIG. 4 shows an electrical wire 19 with a conical shape in the direction of the longitudinal axis Diameter course, which is coated with an ignition charge 20.
  • the explosive evaporation takes place first at the point 21 at which the wire 19 has its smallest diameter and then moves in the direction of increasing the diameter.
  • Ignition processes can be generated, the time in the longitudinal direction of the wire 19 run controlled. The running speeds are determined by the wire geometry and / or adjusted by the shape of the current pulse.
  • the primer can also be made using appropriate additives be electrically conductive.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Air Bags (AREA)
  • Automotive Seat Belt Assembly (AREA)

Abstract

An electrothermic ignition system for igniting a powder charge (4) consists of an electrically conducting wire (11) that extends at least part way through the charge, and an electrical source (3). The conducting wire has a coating consisting of a pyrotechnic material.

Description

Die Erfindung betrifft eine elektrothermische Anzündvorrichtung zur Anzündung einer Pulver-Treibladung. Die Erfindung bezieht sich ferner auf ein Verfahren zur Herstellung einer derartigen Anzündvorrichtung.The invention relates to an electrothermal igniter for igniting a Powder propellant. The invention further relates to a method of manufacture such an igniter.

Bei bekannten Patronen mit elektrothermischer Zündvorrichtung wird zur Zündung des Treibladungspulvers im bodenseitigen Bereich der entsprechenden Patrone ein drahtförmiger Leiter von einem derart hohen Strom durchflossen, daß er explosionsartig verdampft und eine Lichtbogenentladung einleitet. Über diese Lichtbogenentladung wird dann das entsprechende Treibladungspulver angezündet.In known cartridges with an electrothermal ignition device is used to ignite the Propellant powder in the bottom area of the corresponding cartridge is a wire Such a high current flows through the conductor that it evaporates explosively and initiates an arc discharge. This will then be done via this arc discharge appropriate propellant powder ignited.

Als nachteilig hat es sich erwiesen, daß bei einer rein elektrothermischen Anzündvorrichtung die gesamte, zur reproduzierbaren Anzündung notwendige Energie elektrisch bereitgestellt werden muß. Hierdurch ergibt sich ein hoher Bedarf an elektrischer Energie.It has proven to be disadvantageous that with a purely electrothermal igniter all the energy required for reproducible ignition is provided electrically must become. This results in a high demand for electrical energy.

Aus der nicht vorveröffentlichten deutschen Patentanmeldung DE 199 21 379.8 ist es ferner bekannt, die drahtförmigen Leiter nicht unmittelbar durch die Treibladung hindurchzuführen, sondern innerhalb von aus Treibladungspulver bestehenden Röhren anzuordnen. Diese Treibladungspulver-Röhren bilden dann innerhalb der Treibladung Anzündkanäle. It is also from the unpublished German patent application DE 199 21 379.8 known not to lead the wire-shaped conductors directly through the propellant charge, but to be placed inside tubes made of propellant powder. These propellant powder tubes then form ignition channels within the propellant charge.

Bei Aktivierung der Anzündvorrichtung verdampft zunächst der drahtförmige Leiter und im Inneren der jeweiligen Treibladungspulver-Röhren entsteht ein Lichtbogenplasmakanal. Über die Plasmakanäle wird die Energie über Strahlungstransportmechanismen an die Umgebung abgegeben. Diese Energieabgabe führt zu einer raschen Anzündung der Treibladungspulver-Röhren und zu deren Umsetzung. Die dabei entstehenden Treibladungsgase der Treibladungspulver-Röhren sowie die freigegebene Lichtbogenstrahlung verursachen ein schnelles und gleichmäßiges Anzünden des umgebenen Treibladungsaufbaus.When the ignition device is activated, the wire-shaped conductor and first evaporates an arc plasma channel is created inside the respective propellant powder tubes. The energy is transferred to the. Via the plasma channels via radiation transport mechanisms Environment. This release of energy leads to a rapid ignition of the propellant powder tubes and their implementation. The resulting propellant gases of the propellant powder tubes and the released arc radiation a quick and even ignition of the surrounding propellant charge.

Aus der unveröffentlichten DE 199 21 379.8 ist es ebenfalls bekannt, die elektrisch leitenden Drähte durch eine Metallisierung zu ersetzen, die innenseitig auf die Treibladungspulver-Röhren aufgebracht wird.From the unpublished DE 199 21 379.8 it is also known that the electrically conductive Replace wires with a metallization that is on the inside of the propellant powder tubes is applied.

Ausgehend von der DE 199 21 379.8 liegt der Erfindung die Aufgabe zugrunde, eine Anzündvorrichtung anzugeben, bei der zur Anzündung der Pulver-Treibladung ein reduzierter Bedarf an elektrisch zuzuführender Energie erforderlich ist, wobei die vorteilhaften Eigenschaften der elektrothermischen Anzündung weiterhin genutzt werden können. Ferner soll ein Verfahren zur Herstellung einer derartigen Anzündvorrichtung offenbart werden.Starting from DE 199 21 379.8, the object of the invention is an ignition device to be specified at which a reduced to ignite the powder propellant charge Need for electrical power is required, the beneficial properties the electrothermal ignition can still be used. Furthermore should a method for producing such an igniter are disclosed.

Diese Aufgabe wird erfindungsgemäß hinsichtlich der Anzündvorrichtung durch die Merkmale des Anspruchs 1 und hinsichtlich des Verfahrens durch die Merkmale des Anspruchs 6 gelöst. Weitere, besonders vorteilhafte Ausgestaltungen der Erfindung offenbaren die Unteransprüche.This object is achieved with regard to the igniter by Features of claim 1 and with respect to the method by the features of the claim 6 solved. Reveal further, particularly advantageous embodiments of the invention the subclaims.

Die Erfindung beruht im wesentlichen auf dem Gedanken, den elektrisch leitenden Draht nicht in eine Treibladungspulver-Röhre einzubringen, sondern mit einem pyrotechnischen Anzündsatz zu beschichten. Als vorteilhaft hat sich als Anzündsatz ein Gemisch auf der Basis Kaliumperchlorat-Zirkonium (KClO4-Zr) erwiesen.The invention is essentially based on the idea of not introducing the electrically conductive wire into a propellant charge powder tube, but rather to coat it with a pyrotechnic primer. A mixture based on potassium perchlorate-zirconium (KClO 4 -Zr) has proven to be advantageous as an ignition charge.

Vorzugsweise wird diesem Gemisch ein polymerer Binder aus der Reihe der Fluoralkane beigegeben, welcher bewirkt, daß der Anzündsatz aus einer Lösemittelemulsion heraus auf Drähte aufgetragen werden kann und nach Verdampfen des Lösemittels fest am Draht haftet. Der Binderanteil verleiht dem am Draht haftenden Zündsatz darüberhinaus auch elastische Eigenschaften.This mixture is preferably a polymeric binder from the series of fluoroalkanes added, which causes the primer from a solvent emulsion Wires can be applied and after evaporation of the solvent firmly on the wire is liable. The proportion of binder also gives the primer sticking to the wire elastic properties.

Nach Initiierung des Anzündsatzes durch einen durch den Draht fließenden Strom setzt sich das Gemisch um und es wird bei Temperaturen um 4000°C Zirkoniumoxid (ZrO2) gebildet, welches als feine hot spots die Anzündung des Treibladungspulvers unterstützt und den Bedarf an elektrischer Energie reduziert.After initiation of the ignition charge by a current flowing through the wire, the mixture reacts and zirconium oxide (ZrO 2 ) is formed at temperatures around 4000 ° C, which, as fine hot spots, supports the ignition of the propellant charge powder and reduces the need for electrical energy.

Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus den folgenden anhand von Figuren erläuterten Ausführungsbeispielen. Es zeigen:

  • Fig.1 den Längsschnitt durch eine Patrone mit einer erfindungsgemäßen Anzündvorrichtung, welche einen elektrisch leitenden, einen homogenen Durchmesser aufweisenden Draht umfaßt, der mit einem Anzündsatz beschichtet ist;
  • Fig.2 die vergrößerte Darstellung eines Querschnittes durch den beschichteten Draht entlang der in Fig. 1 mit II-II bezeichneten Schnittlinie;
  • Fig.3-5 drei Längsschnitte durch elektrisch leitende Drähte, die jeweils mit einem Anzündsatz beschichtet sind und unterschiedlich ausgebildete Durchmesser aufweisen.
    • Further details and advantages of the invention result from the following exemplary embodiments explained with reference to figures. Show it:
  • 1 shows the longitudinal section through a cartridge with an ignition device according to the invention, which comprises an electrically conductive wire having a homogeneous diameter, which is coated with an ignition charge;
  • 2 shows the enlarged representation of a cross section through the coated wire along the section line designated II-II in FIG. 1;
  • Fig. 3-5 three longitudinal sections through electrically conductive wires, which are each coated with an ignition charge and have differently shaped diameters.

    • In Fig. 1 ist mit 1 eine Patrone (z.B. zum Verschießen aus einer Panzerwaffe) bezeichnet, die zur Zündung über einen Schalter 2 mit einer Stromquelle 3 verbunden ist. Die entsprechende Waffe, in der sich die Patrone 1 befindet, ist aus Übersichtlichkeitsgründen nicht dargestellt.In Fig. 1, 1 denotes a cartridge (e.g. for firing from an armored weapon), which is connected to a current source 3 for ignition via a switch 2. The corresponding The weapon in which the cartridge 1 is located is not for reasons of clarity shown.

    Die Patrone 1 umfaßt eine mit einer Treibladung 4 gefüllte Hülse 5 und einen die Treibladungshülse 5 bodenseitig abschließenden Hülsenboden 6. Die verbrennbare Hülse 5 ist im Bereich ihres hülsenbodenseitigen Endes 7 formschlüssig zwischen einem Isolierformteil 8 und dem Hülsenboden 6 fixiert.The cartridge 1 comprises a sleeve 5 filled with a propellant charge 4 and a propellant charge sleeve 5 bottom-closing sleeve bottom 6. The combustible sleeve 5 is in Area of its end 7 on the sleeve bottom in a form-fitting manner between an insulating molded part 8 and the sleeve bottom 6 fixed.

    In dem Hülsenboden 6 ist mittig eine gegenüber diesem elektrisch isolierte Hochspannungselektrode 9 angeordnet, die durch das Isolierformteil 8 hindurchgeführt und mit einer Metallscheibe 10 verbunden ist.In the middle of the sleeve base 6 is a high-voltage electrode which is electrically insulated from it 9 arranged, which passed through the molded insulating part 8 and with a Metal disc 10 is connected.

    An der Metallscheibe 10 ist ein elektrisch leitender Draht 11 mit über seine Länge homogenem Durchmesser befestigt, der mit einem Anzündsatz 12 beschichtet ist (Fig.2). Im Bereich des Hülsendeckels 13 der Treibladungshülse 5 ist der Draht 11 mit einem ringförmigen Kontaktteil 14 verbunden, welches seinerseits die auf Erdpotential liegende Innenwand der nicht dargestellten Waffe kontaktiert.On the metal disc 10 is an electrically conductive wire 11 with a homogeneous over its length Fixed diameter, which is coated with an ignition charge 12 (Fig.2). in the Area of the sleeve cover 13 of the propellant charge sleeve 5 is the wire 11 with an annular Contact part 14 connected, which in turn is the inner wall at ground potential contacted the weapon, not shown.

    Zum Verschießen der Patrone 1 wird der Schalter 2 geschlossen und die mit einer Reihe von aufgeladenen Kondensatoren bestückte Stromquelle 3 (bei einer Spannung bis zu 40 kV) schlagartig entladen. Der dabei auftretende Entladestrom führt zu einem explosionsartigen Verdampfen des Drahtes 11 und zur Einleitung eines Lichtbogenplasmas auf der gesamten Länge des Drahtes. Durch die Wechselwirkung des Lichtbogenplasmas mit dem Anzündsatz 12 wird dessen Initiierung auf der gesamten Länge der Beschichtung 12 bewirkt und die dabei entstehenden pyrotechnischen Partikel werden in die Treibladung 4 hineingeschleudert.To shoot the cartridge 1, the switch 2 is closed and the one with a row current source 3 equipped with charged capacitors (at a voltage of up to 40 unloaded suddenly. The resulting discharge current leads to an explosive Vaporizing the wire 11 and initiating an arc plasma all over Length of wire. By the interaction of the arc plasma with the Ignition charge 12 is initiated over the entire length of the coating 12 and the resulting pyrotechnic particles are in the propellant charge 4th hurled in.

    Fig.3 zeigt den Aufbau eines lichtbogeneinleitenden Drahtes 15 mit inhomogenem Durchmesser, welcher mit einem Anzündsatz 16 ummantelt ist. Bei Einleitung eines entsprechend hohen Stromes in den Draht 15 wird dieser zunächst in den Bereichen 17 mit geringem Durchmesser explosionsartig verdampft. In diesen Bereichen beginnt daher zunächst die Ausbildung von Lichtbogenplasmen und deren Wechselwirkung mit dem Anzündsatz 16. Zeitlich versetzt erfolgt dann die Bildung von Lichtbogenplasmen in den Bereichen 18 des Drahtes 15, die einen größeren Durchmesser aufweisen. Über die Drahtdicke und/oder über die Stromverläufe kann die gewünschte Zeitverzögerung der Erzeugung der Plasmen in der Treibladung eingestellt werden. Über die Abstände der Drahtinhomogenitäten kann eine entsprechende räumliche Verteilung der Plasmen erzeugt werden.3 shows the structure of an arc-introducing wire 15 with an inhomogeneous diameter, which is coated with an ignition charge 16. When initiating a corresponding high current in the wire 15, this is initially in the areas 17 with low Diameter evaporated explosively. In these areas, therefore, begins first the formation of arc plasmas and their interaction with the primer 16. Arc plasmas are then formed in regions 18 at different times of the wire 15, which have a larger diameter. About the wire thickness and / or The desired time delay in the generation of the plasmas can be determined via the current profiles be set in the propellant charge. About the distances of the wire inhomogeneities can a corresponding spatial distribution of the plasmas are generated.

    Fig.4 zeigt einen elektrischen Draht 19 mit in Richtung der Längsachse konisch ausgebildetem Durchmesserverlauf, welcher mit einem Anzündsatz 20 beschichtet ist. Bei Einleitung eines entsprechend hohen Stromes erfolgt die explosionsartige Verdampfung zunächst an der Stelle 21, an welcher der Draht 19 seinen geringsten Durchmesser aufweist und wandert dann in Richtung der Durchmesservergrößerung. Mit einem derartigen Aufbau können Anzündvorgänge erzeugt werden, die in Längsrichtung des Drahtes 19 zeitlich gesteuert ablaufen. Die Ablaufgeschwindigkeiten werden dabei durch die Drahtgeometrie und/oder durch die Form des Strompulses eingestellt.4 shows an electrical wire 19 with a conical shape in the direction of the longitudinal axis Diameter course, which is coated with an ignition charge 20. At initiation of a correspondingly high current, the explosive evaporation takes place first at the point 21 at which the wire 19 has its smallest diameter and then moves in the direction of increasing the diameter. With such a structure Ignition processes can be generated, the time in the longitudinal direction of the wire 19 run controlled. The running speeds are determined by the wire geometry and / or adjusted by the shape of the current pulse.

    Die gleichen Überlegungen gelten auch für das in Fig.5 dargestellte Ausführungsbeispiel, bei dem ein elektrischer Draht 22 eine stufenförmige Vergrößerung des Durchmessers aufweist.The same considerations also apply to the exemplary embodiment shown in FIG. 5, in which an electrical wire 22 is a stepwise increase in diameter having.

    Die Erfindung ist selbstverständlich nicht auf die vorstehend beschriebenen Ausführungsbeispiele beschränkt. So kann beispielsweise auch der Zündsatz durch entsprechende Zusätze elektrisch leitend ausgebildet sein. The invention is of course not based on the exemplary embodiments described above limited. For example, the primer can also be made using appropriate additives be electrically conductive.

    BezugszeichenlisteReference list

    11
    Patronecartridge
    22nd
    Schalterswitch
    33rd
    StromquellePower source
    44th
    Treibladung, Pulver-TreibladungPropellant charge, powder propellant charge
    55
    Hülse, TreibladungshülseSleeve, propellant charge sleeve
    66
    HülsenbodenSleeve bottom
    77
    EndeThe End
    88th
    IsolierformteilInsulating molded part
    99
    HochspannungselektrodeHigh voltage electrode
    1010th
    MetallscheibeMetal disc
    1111
    Drahtwire
    1212th
    Anzündsatz, BeschichtungIgnition charge, coating
    1313
    HülsendeckelSleeve cover
    1414
    KontaktteilContact part
    1515
    Drahtwire
    1616
    AnzündsatzIgnition charge
    1717th
    BereichArea
    1818th
    BereichArea
    1919th
    Drahtwire
    2020th
    AnzündsatzIgnition charge
    2121
    StelleJob
    2222
    Drahtwire

    Claims (6)

    Elektrothermische Anzündvorrichtung zur Anzündung einer Pulver-Treibladung (4) mit den Merkmalen: a) die Anzündvorrichtung umfaßt mindestens einen sich mindestens teilweise durch die Treibladung erstreckenden elektrisch leitenden Draht (11;15;19;22), welcher mit einer Stromquelle (3) verbindbar ist und b) der elektrisch leitende Draht (11;15;19;22) ist mindestens in einem Teilbereich mit einem pyrotechnischen Anzündsatz (12;16;20) beschichtet. Electrothermal ignition device for igniting a powder propellant charge (4) with the features: a) the ignition device comprises at least one electrically conductive wire (11; 15; 19; 22) which extends at least partially through the propellant charge and which can be connected to a current source (3) and b) the electrically conductive wire (11; 15; 19; 22) is coated with a pyrotechnic igniter (12; 16; 20) at least in a partial area. Anzündvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Draht (11;15;19;22) entsprechend dem gewünschten Anzündverhalten der Anzündvorrichtung innerhalb des Anzündsatzes (12;16;20) einen homogenen, inhomogenen, konisch sich erweiternden oder in Stufen sich vergrößernden Durchmesser aufweist.Ignition device according to Claim 1, characterized in that the wire (11; 15; 19; 22) has a homogeneous, inhomogeneous, conically widening or incrementally increasing diameter in accordance with the desired ignition behavior of the igniter within the ignition unit (12; 16; 20) having. Anzündvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Anzündsatz (12;16;20) durch entsprechende Zusätze elektrisch leitend ist.Ignition device according to claim 1 or 2, characterized in that the ignition charge (12; 16; 20) is electrically conductive through appropriate additives. Anzündvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß es sich bei dem pyrotechnischen Anzündsatz (12;16;20) um ein Gemisch auf der Basis Kaliumperchlorat-Zirkonium (KClO4-Zr) handelt.Ignition device according to one of Claims 1 to 3, characterized in that the pyrotechnic ignition charge (12; 16; 20) is a mixture based on potassium perchlorate-zirconium (KClO 4 -Zr). Anzündvorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß das Kaliumperchlorat-Zirkonium-Gemisch einen polymeren Binder aus der Reihe der Fluoralkane enthält. Igniter according to claim 4, characterized in that the potassium perchlorate-zirconium mixture contains a polymeric binder from the series of fluoroalkanes. Verfahren zur Herstellung einer Anzündvorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß aus dem Kaliumperchlorat-Zirkonium-Gemisch nach Zumischung des Binders unter Verwendung eines entsprechenden Lösemittels eine Emulsion hergestellt wird, daß diese Lösemittelemulsion dann auf den elektrisch leitenden Draht (11;15;19;22) aufgetragen wird und daß anschließend das Lösemittel verdampft wird.A method for producing an ignition device according to claim 5, characterized in that an emulsion is prepared from the potassium perchlorate-zirconium mixture after admixing the binder using a suitable solvent, so that this solvent emulsion is then applied to the electrically conductive wire (11; 15; 19; 22) is applied and that the solvent is then evaporated.
    EP01105851A 2000-04-22 2001-03-09 Electrothermal ignition device for an ammunition cartridge and its manufacturing process Expired - Lifetime EP1148313B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10020019A DE10020019A1 (en) 2000-04-22 2000-04-22 Electrothermal igniter and process for its manufacture
    DE10020019 2000-04-22

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    EP1148313A2 true EP1148313A2 (en) 2001-10-24
    EP1148313A3 EP1148313A3 (en) 2004-02-04
    EP1148313B1 EP1148313B1 (en) 2005-08-10

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    US (1) US6578493B2 (en)
    EP (1) EP1148313B1 (en)
    KR (1) KR20010098796A (en)
    DE (2) DE10020019A1 (en)
    IL (1) IL142594A (en)

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    US7073447B2 (en) * 2003-02-12 2006-07-11 Bae Systems Land & Armaments L.P. Electro-thermal chemical igniter and connector
    US6805055B1 (en) 2003-06-25 2004-10-19 Gamma Recherches & Technologies Patent Sa Plasma firing mechanism and method for firing ammunition
    US10801818B2 (en) * 2013-04-26 2020-10-13 Dana Raymond Allen Method and device for micro blasting with reusable blasting rods and electrically ignited cartridges

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    Also Published As

    Publication number Publication date
    EP1148313B1 (en) 2005-08-10
    EP1148313A3 (en) 2004-02-04
    IL142594A0 (en) 2002-03-10
    US20020005136A1 (en) 2002-01-17
    KR20010098796A (en) 2001-11-08
    US6578493B2 (en) 2003-06-17
    DE50107011D1 (en) 2005-09-15
    DE10020019A1 (en) 2001-10-25
    IL142594A (en) 2007-08-19

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