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EP0401075A1 - Explosive device with preformed splinters and manufacturing method therefor - Google Patents

Explosive device with preformed splinters and manufacturing method therefor Download PDF

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Publication number
EP0401075A1
EP0401075A1 EP90401282A EP90401282A EP0401075A1 EP 0401075 A1 EP0401075 A1 EP 0401075A1 EP 90401282 A EP90401282 A EP 90401282A EP 90401282 A EP90401282 A EP 90401282A EP 0401075 A1 EP0401075 A1 EP 0401075A1
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EP
European Patent Office
Prior art keywords
splinters
fragments
generating
explosive
explosive device
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.)
Withdrawn
Application number
EP90401282A
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German (de)
French (fr)
Inventor
Guy Couturier
Joel Ferron
Michel Fraigneau
Claude Perthuis
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Thomson Brandt Armements SA
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Thomson Brandt Armements SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Thomson Brandt Armements SA filed Critical Thomson Brandt Armements SA
Publication of EP0401075A1 publication Critical patent/EP0401075A1/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/20—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
    • F42B12/22—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction
    • F42B12/32—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction the hull or case comprising a plurality of discrete bodies, e.g. steel balls, embedded therein or disposed around the explosive charge

Definitions

  • the invention relates to flake generators with a pre-fragmented envelope, the envelope of which consists, for example, either of a stack of pre-fragmented rings, or of a stack of independent fragments, or of a winding of a pre-fragmented bar. It relates to the decoupling of the fragments of generator of pre-fragmented fragments in order to constitute in particular military charges and, in particular, charges with sheaf of focused fragments.
  • configurations of military charges comprising a main explosive charge, an envelope generating pre-fragmented fragments and closing flanges to contain the explosive charge 1.
  • the fragment-generating envelope often consists, for loads with a focused burst of shrapnel, in a stack of pre-fragmented rings or in a stack of independent fragments or in the winding of a pre-fragmented bar.
  • the applicant's experience has shown that, when the charges exploded, welds of initially independent flakes.
  • shock wave welds occur between an envelope called a metal ferrule limiting the loading explosive and the fragments of the shell generating fragments but also between the fragments themselves which are placed parallel to each other with respect to a perpendicular to the longitudinal axis of the explosive charge reducing in an uncontrolled manner the and therefore the effectiveness of the explosive charge.
  • the object of the invention is to remedy these drawbacks by proposing a simple explosive device whose nature and structure of certain elements constituting it ensure better efficiency of the military charge.
  • the subject of the invention is an explosive device according to claim 1.
  • the explosive device E comprises, as in the prior art, a main explosive charge 1 inside which is placed a booster relay 2 of the detonation which is connected to a detonator , not shown, by a channel 3.
  • the reinforcing relay 2 of the charge is, for example, placed substantially in the middle of the explosive charge 1.
  • the explosive device also comprises closing flanges (4, 5) positioned at the ends of the explosive charge 1, a metal ferrule 6 limiting, on the lateral parts, the explosive charge 1 and a casing generating fragments 7 fixed around the metallic ferrule 6 and generally in the form of revolution around a longitudinal axis 8 of the explosive device.
  • the metallic ferrule 6 has been shown concave but this shape is not limiting.
  • the casing generating fragments 7 is constituted either by a stack of rings, for example, independent and pre-fragmented, or by a pre-fragmented strip. It is positioned on the external periphery of the metal ferrule 6; this metallic ferrule 6 has been previously covered with a material 9, for example, aluminum oxide to prevent the welding of the fragments of the fragment-generating envelope 7 on the ferrule 6, this welding being caused by the shock wave induced in the shell 6 which results from the detonation of the explosive charge 1.
  • the main characteristic of the material chosen to obtain this result is to have a mechanical impedance sufficiently different from the material used for the realization of the shell 6.
  • the aluminum oxide layer is obtained, for example, by spray metallization.
  • a simple covering of the ferrule 6 may be sufficient for a particular configuration of the focused sheaf load; this configuration is a function of various factors, for example, the size of the charge, the position of the detonation source giving a particular direction to the fragments.
  • the characteristic of the material is its mechanical impedance which must be sufficiently different from that of the chips to avoid any inter-chip welding.
  • part of the energy of the shock wave causes a weld between the flakes of the rings or adjacent turns constituting the casing generating splinters that is ie parallel to each other with respect to a perpendicular to the longitudinal axis of the explosive charge; this weld depends on a direction of a component of the speed vector of each of the rings or each of the turns placed parallel along the longitudinal axis 8 thus preventing any separation between the fragments of adjacent rings or turns.
  • the covering, around each of the rings or turns of the prefragmented strip is carried out, for example, by coating around each ring or each turn of the prefragmented strip, of the material 9 on at least two faces A and B respectively in contact with the faces B ′ and A ⁇ of the rings or turns of the prefragmented strip, positioned on either side.
  • the material 9 used for coating the different faces of the flakes is, for example, aluminum oxide. This coating is obtained, for example, by spray metallization.
  • the covering of the shell and the coating of the casing generating fragments are obtained, by vacuum impregnation of the explosive device defined above. A vacuum impregnation device is shown in Figure 2.
  • the explosive device E is positioned inside a tank 11 whose size and volume are determined according to the explosive device E.
  • This tank 11 is filled with a product 12, for example an epoxy resin; the product 12 is determined as a function of its mechanical impedance which must be very different from that of the flakes to avoid any welding between the flakes during a detonation.
  • the tank 11 is closed at its upper end by a sealed cover 13 provided with an opening 14 in connection with a pump 16 by a fixing system 15; this pump 16, when activated, makes it possible to create a relative vacuum inside the tank 11 and ensures the infiltration of the product 12 between the rings or turns of the prefragmented strip constituting the casing generating splinters.
  • FIG. 3 illustrates a sheath, for example, heat shrink 17; this heat-shrinkable sheath 17 surrounds either a prefragmented strip 18 or independent flakes 19. This configuration avoids any welding of the flakes during the detonation due to mechanical decoupling due to the impedance of the heat-shrinkable sheath.
  • this heat-shrinkable sheath allows the introduction of calibrated bursts of perforating power adapted to a type of objective.
  • the heat-shrinkable sheath 17 containing the splinters is positioned on the ferrule 6 generally in the form of a spiral winding.
  • the structure of the heat-shrinkable sheath is such that the material constituting it has a mechanical impedance sufficiently different from that of the flakes to create a mechanical decoupling between these flakes.
  • a coating of a single sheath over the entire stack of rings can be carried out. This coating makes it possible to obtain the same result as an individual coating of each of the rings constituting the stack.
  • the invention applies to any projectile of the focused sheaf effect type to ensure the destruction of a determined target.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention relates to splinter generators with a casing prefragmented to obtain a focused cluster of splinters. It relates more particularly to the uncoupling of the splinters of a prefragmented casing, in order to prevent any welding, on the one hand between the elements limiting the explosive charge and the splinters and on the other hand between the splinters of each of the adjacent rings or turns constituting the splinter-generating casing. This welding usually limits the effectiveness of the focused cluster of splinters. The invention involves covering with a layer of a material (9) the outer periphery of a shell (6) laterally limiting the explosive charge and coating the splinter-generating casing (7) positioned on the outer periphery of the shell (6) with a layer of another or of the same material. These materials have the characteristic of possessing a mechanical impedance sufficiently different from that of the splinters to prevent the various welds caused by the shock wave which emanates from the detonation of the explosive charge. <IMAGE>

Description

L'invention concerne les générateurs d'éclats à enveloppe préfragmentée dont l'enveloppe est constituée, par exemple, soit d'un empilement d'anneaux préfragmentés, soit d'un empilement d'éclats indépendants, soit d'un enroulement d'une barre préfragmentée. Elle concerne le découplage des éclats de générateur d'éclats préfragmentés en vue de constituer notamment des charges militaires et, en particulier, des charges à gerbe d'éclats focalisée.The invention relates to flake generators with a pre-fragmented envelope, the envelope of which consists, for example, either of a stack of pre-fragmented rings, or of a stack of independent fragments, or of a winding of a pre-fragmented bar. It relates to the decoupling of the fragments of generator of pre-fragmented fragments in order to constitute in particular military charges and, in particular, charges with sheaf of focused fragments.

La plupart des charges explosives à gerbe d'éclats focalisée sont du type à générateurs d'éclats préfragmentés, l'impact des éclats sur un objectif devant provoquer sa destruction. Les gerbes d'éclats sont généralement focalisées suivant un plan normal à l'axe de la charge ou voisin de celui-ci. La destruction de l'objectif s'obtient d'autant plus facilement que la gerbe d'éclats ne comporte que des éclats calibrés de pouvoir perforant adapté au type d'objectif traité. La calibration des éclats arrivant sur l'objectif doit donc être la plus précise possible ce qui conditionne le flux des éclats efficaces.Most of the explosive charges with a focused burst of shrapnel are of the type with pre-fragmented burst generators, the impact of the fragments on a target having to cause its destruction. The sheaves of splinters are generally focused along a plane normal to the axis of the charge or close to it. The destruction of the objective is obtained all the more easily as the sheaf of shards only comprises calibrated shards of perforating power adapted to the type of objective treated. The calibration of the fragments arriving on the objective must therefore be as precise as possible, which conditions the flow of the effective fragments.

A titre d'exemple, on connaît déjà des configurations de charges militaires comprenant un chargement explosif principal, une enveloppe génératrice d'éclats préfragmentés et des flasques de fermeture pour contenir le chargement explosif 1. L'enveloppe génératrice d'éclats consiste souvent, pour les charges à gerbe d'éclats focalisée, en un empilement d'anneaux préfragmentés ou en un empilement d'éclats indépendants ou en l'enroulement d'une barre préfragmentée. Toutefois, l'expérience de la demanderesse a montré que, lors de l'explosion des charges, des soudures d'éclats initialement indépendants. Ces soudures réalisées par onde de choc se produisent entre une enveloppe appelée virole métallique limitant le chargement explosif et les éclats de l'enveloppe génératrice d'éclats mais aussi entre les éclats eux-mêmes qui sont placés parallèlement les uns aux autres par rapport à une perpendiculaire à l'axe longitudinal de la charge explosive réduisant de façon non contrôlée le flux d'éclats et par conséquent l'efficacité de la charge explosive.By way of example, configurations of military charges are already known comprising a main explosive charge, an envelope generating pre-fragmented fragments and closing flanges to contain the explosive charge 1. The fragment-generating envelope often consists, for loads with a focused burst of shrapnel, in a stack of pre-fragmented rings or in a stack of independent fragments or in the winding of a pre-fragmented bar. However, the applicant's experience has shown that, when the charges exploded, welds of initially independent flakes. These shock wave welds occur between an envelope called a metal ferrule limiting the loading explosive and the fragments of the shell generating fragments but also between the fragments themselves which are placed parallel to each other with respect to a perpendicular to the longitudinal axis of the explosive charge reducing in an uncontrolled manner the and therefore the effectiveness of the explosive charge.

Le but de l'invention est de remédier à ces inconvénients en proposant un dispositif explosif simple dont la nature et la structure de certains éléments le constituant assurent une meilleure efficacité de la charge militaire.The object of the invention is to remedy these drawbacks by proposing a simple explosive device whose nature and structure of certain elements constituting it ensure better efficiency of the military charge.

L'objet de l'invention est un dispositif explosif selon la revendication 1.The subject of the invention is an explosive device according to claim 1.

L'invention et ses caractéristiques seront mieux comprises à la lecture de la description qui suit, et qui est accompagnée des dessins suivants représentant respectivement :

  • - figure 1, une vue en coupe d'une structure de charge explosive à gerbe d'éclats focalisée selon l'invention ;
  • - figure 2, un dispositif d'imprégnation du matériau selon l'invention ;
  • - figure 3, un schéma d'une gaine thermorétractable contenant une bande préfragmentée ou des éléments séparés et positionnée autour de la virole selon l'invention.
The invention and its characteristics will be better understood on reading the description which follows, and which is accompanied by the following drawings respectively representing:
  • - Figure 1, a sectional view of an explosive charge structure with sheaf of shards focused according to the invention;
  • - Figure 2, a device for impregnating the material according to the invention;
  • - Figure 3, a diagram of a heat-shrinkable sheath containing a pre-fragmented strip or separate elements and positioned around the shell according to the invention.

En référence à la figure 1, le dispositif explosif E, selon l'invention comprend, comme dans l'art antérieur, un chargement explosif principal 1 à l'intérieur duquel est placé un relais renforçateur 2 de la détonation lequel est relié à un détonateur, non représenté, par un canal 3. Le relais renforçateur 2 de la charge est, par exemple, placé sensiblement au milieu du chargement explosif 1. Le dispositif explosif comprend également des flasques de fermeture (4, 5) positionnés aux extrémités du chargement explosif 1, une virole métallique 6 limitant, sur les parties latérales, le chargement explosif 1 et une enveloppe génératrice d'éclats 7 fixée autour de la virole métallique 6 et généralement de forme de révolution autour d'un axe longitudinal 8 du dispositif explosif. Sur cette figure, la virole métallique 6 a été représentée concave mais cette forme n'est pas limitative. L'enveloppe génératrice d'éclats 7 est constituée soit par un empilement d'anneaux, par exemple, indépendants et préfragmentés, soit par une bande préfragmentée. Elle est positionnée sur la périphérie externe de la virole métallique 6 ; cette virole métallique 6 a été préalablement recouverte d'un matériau 9, par exemple, de l'oxyde d'aluminium pour empêcher la soudure des éclats de l'enveloppe génératrice d'éclats 7 sur la virole 6, cette soudure étant provoquée par l'onde de choc induite dans la virole 6 qui résulte de la détonation du chargement explosif 1. La principale caractéristique du matériau choisi pour obtenir ce résultat, est d'avoir une impédance mécanique suffisamment différente du matériau utilisé pour la réalisation de la virole 6. La couche d'oxyde d'aluminium est obtenue, par exemple, par métallisation au pistolet. Un simple recouvrement de la virole 6 peut être suffisant pour une configuration particulière de la charge à gerbe d'éclats focalisée ; cette configuration est fonction de différents facteurs, par exemple, la taille de la charge, la position de la source de détonation donnant une direction particulière aux éclats. Mais, pour optimiser le nombre d'éclats, il est souhaitable de recouvrir également l'enveloppe génératrice d'éclats 7 d'un même ou autre matériau utilisé pour le recouvrement de la virole (6). La caracté­ristique du matériau est son impédance mécanique qui doit être suffisamment différente de celle des éclats pour éviter toute soudure inter-éclats. En effet, lors de la répartition de l'onde de choc, une partie de l'énergie de l'onde de choc provoque une soudure entre les éclats des anneaux ou des spires adjacents constituant l'enveloppe génératrice d'éclats c'est-à-dire parallèlement les uns aux autres par rapport à une perpendiculaire à l'axe longitudinal de la charge explosive ; cette soudure dépend d'une direction d'une composante du vecteur vitesse de chacun des anneaux ou chacune des spires placé parallèlement selon l'axe longitudinal 8 empêchant ainsi toute séparation entre les éclats d'anneaux ou de spires adjacents. Le recouvrement, autour de chacun des anneaux ou spires de la bande préfragmentée est réalisé, par exemple, par enrobage autour de chaque anneau ou de chaque spire de la bande préfragmentée, du matériau 9 sur au moins deux faces A et B respectivement en contact avec les faces B′ et A˝ des anneaux ou spires de la bande préfragmentée, positionnés de part et d'autre. Le matériau 9 utilisé pour l'enrobage des différentes faces des éclats, est, par exemple, en oxyde d'aluminium. Cet enrobage est obtenu, par exemple, par métallisation au pistolet. Selon un autre mode de réalisation, à titre d'exemple non limitatif, le recouvrement de la virole et l'enrobage de l'enveloppe génératrice d'éclats sont obtenus, par imprégnation sous vide du dispositif explosif défini précédemment. Un dispositif d'imprégnation sous vide est représenté à la figure 2. Sur cette figure 2, le dispositif explosif E est positionné à l'intérieur d'une cuve 11 dont la taille et le volume sont déterminés en fonction du dispositif explosif E. Cette cuve 11 est rempli d'un produit 12, par exemple d'une résine époxyde ; le produit 12 est déterminé en fonction de son impédance mécanique qui doit être très différente de celle des éclats pour éviter toute soudure entre les éclats lors d'une détonation. La cuve 11 est fermée à son extrémité supérieure par un couvercle étanche 13 muni d'une ouverture 14 en liaison avec une pompe 16 par un système de fixation 15 ; cette pompe 16, lorsqu'elle est activée, permet de créer un vide relatif à l'intérieur de la cuve 11 et assure l'infiltration du produit 12 entre les anneaux ou spires de la bande préfragmentés constituant l'enveloppe génératrice d'éclats.Referring to Figure 1, the explosive device E, according to the invention comprises, as in the prior art, a main explosive charge 1 inside which is placed a booster relay 2 of the detonation which is connected to a detonator , not shown, by a channel 3. The reinforcing relay 2 of the charge is, for example, placed substantially in the middle of the explosive charge 1. The explosive device also comprises closing flanges (4, 5) positioned at the ends of the explosive charge 1, a metal ferrule 6 limiting, on the lateral parts, the explosive charge 1 and a casing generating fragments 7 fixed around the metallic ferrule 6 and generally in the form of revolution around a longitudinal axis 8 of the explosive device. In this figure, the metallic ferrule 6 has been shown concave but this shape is not limiting. The casing generating fragments 7 is constituted either by a stack of rings, for example, independent and pre-fragmented, or by a pre-fragmented strip. It is positioned on the external periphery of the metal ferrule 6; this metallic ferrule 6 has been previously covered with a material 9, for example, aluminum oxide to prevent the welding of the fragments of the fragment-generating envelope 7 on the ferrule 6, this welding being caused by the shock wave induced in the shell 6 which results from the detonation of the explosive charge 1. The main characteristic of the material chosen to obtain this result is to have a mechanical impedance sufficiently different from the material used for the realization of the shell 6. The aluminum oxide layer is obtained, for example, by spray metallization. A simple covering of the ferrule 6 may be sufficient for a particular configuration of the focused sheaf load; this configuration is a function of various factors, for example, the size of the charge, the position of the detonation source giving a particular direction to the fragments. However, to optimize the number of splinters, it is desirable to also cover the fragment-generating envelope 7 with the same or other material used for covering the ferrule (6). The characteristic of the material is its mechanical impedance which must be sufficiently different from that of the chips to avoid any inter-chip welding. In fact, during the distribution of the shock wave, part of the energy of the shock wave causes a weld between the flakes of the rings or adjacent turns constituting the casing generating splinters that is ie parallel to each other with respect to a perpendicular to the longitudinal axis of the explosive charge; this weld depends on a direction of a component of the speed vector of each of the rings or each of the turns placed parallel along the longitudinal axis 8 thus preventing any separation between the fragments of adjacent rings or turns. The covering, around each of the rings or turns of the prefragmented strip is carried out, for example, by coating around each ring or each turn of the prefragmented strip, of the material 9 on at least two faces A and B respectively in contact with the faces B ′ and A˝ of the rings or turns of the prefragmented strip, positioned on either side. The material 9 used for coating the different faces of the flakes is, for example, aluminum oxide. This coating is obtained, for example, by spray metallization. According to another embodiment, by way of nonlimiting example, the covering of the shell and the coating of the casing generating fragments are obtained, by vacuum impregnation of the explosive device defined above. A vacuum impregnation device is shown in Figure 2. In this Figure 2, the explosive device E is positioned inside a tank 11 whose size and volume are determined according to the explosive device E. This tank 11 is filled with a product 12, for example an epoxy resin; the product 12 is determined as a function of its mechanical impedance which must be very different from that of the flakes to avoid any welding between the flakes during a detonation. The tank 11 is closed at its upper end by a sealed cover 13 provided with an opening 14 in connection with a pump 16 by a fixing system 15; this pump 16, when activated, makes it possible to create a relative vacuum inside the tank 11 and ensures the infiltration of the product 12 between the rings or turns of the prefragmented strip constituting the casing generating splinters.

Un autre exemple des moyens d'enrobage est l'utilisation d'une gaine représentée sur la figure 3. Cette figure 3 illustre une gaine, par exemple, thermorétractable 17 ; cette gaine thermorétractable 17 entoure soit une bande préfragmentée 18, soit des éclats indépendants 19. Cette configuration évite toute soudure des éclats lors de la détonation en raison du découplage mécanique dû à l'impédance de la gaine thermorétractable. D'autre part cette gaine thermorétractable permet d'introduire des éclats calibrés de pouvoir perforant adapté à un type d'objectif. La gaine thermorétractable 17 contenant les éclats est positionnée sur la virole 6 généralement sous la forme d'un enroulement spirale . La structure de la gaine thermorétractable est telle que le matériau la constituant ait une impédance mécanique suffisamment différente de celle des éclats pour créer un découplage mécanique entre ces éclats.Another example of the coating means is the use of a sheath shown in Figure 3. This Figure 3 illustrates a sheath, for example, heat shrink 17; this heat-shrinkable sheath 17 surrounds either a prefragmented strip 18 or independent flakes 19. This configuration avoids any welding of the flakes during the detonation due to mechanical decoupling due to the impedance of the heat-shrinkable sheath. On the other hand, this heat-shrinkable sheath allows the introduction of calibrated bursts of perforating power adapted to a type of objective. The heat-shrinkable sheath 17 containing the splinters is positioned on the ferrule 6 generally in the form of a spiral winding. The structure of the heat-shrinkable sheath is such that the material constituting it has a mechanical impedance sufficiently different from that of the flakes to create a mechanical decoupling between these flakes.

Dans un autre exemple de réalisation, un enrobage d'une gaine unique sur l'ensemble de l'empilement des anneaux peut être réalisé. Cet enrobage permet d'obtenir le même résultat qu'un enrobage individuel de chacun des anneaux constituant l'empilementIn another exemplary embodiment, a coating of a single sheath over the entire stack of rings can be carried out. This coating makes it possible to obtain the same result as an individual coating of each of the rings constituting the stack.

L'invention s'applique à tout projectile du type à effet de gerbe d'éclats focalisée pour assurer la destruction d'une cible déterminée.The invention applies to any projectile of the focused sheaf effect type to ensure the destruction of a determined target.

Claims (14)

1. Dispositif explosif comprenant un chargement explosif principal (1), une virole métallique (6) limitant latéralement le chargement, des flasques de fermeture le limitant axialement et une enveloppe génératrice d'éclats préfragmentés (7) disposée sur la périphérie externe de la virole métallique (6), dispositif caractérisé en ce qu'il comporte une couche d'un matériau d'impédance mécanique suffisamment différente de l'impédance mécanique des éclats et positionnée, d'une part, entre la virole métallique et l'enveloppe génératrice d'éclats et, d'autre part, entre chacun des éclats pour éviter la soudure entre la virole (6) et les éclats ainsi que la soudure entre chacun des éclats (7).1. Explosive device comprising a main explosive charge (1), a metal ferrule (6) laterally limiting the charge, closing flanges limiting it axially and an envelope generating pre-fragmented flakes (7) disposed on the outer periphery of the ferrule metal (6), device characterized in that it comprises a layer of a material of mechanical impedance sufficiently different from the mechanical impedance of the fragments and positioned, on the one hand, between the metallic ferrule and the envelope generating d 'chips and, on the other hand, between each of the chips to avoid welding between the ferrule (6) and the chips as well as the welding between each of the chips (7). 2. Dispositif explosif selon la revendication 1, caractérisé en ce que les éclats sont soudés parallèlement les uns aux autres par rapport à une perpendiculaire à l'axe longitudinal de la charge explosive.2. Explosive device according to claim 1, characterized in that the flakes are welded parallel to each other with respect to a perpendicular to the longitudinal axis of the explosive charge. 3. Dispositif explosif selon l'une des revendications précédentes, caractérisé en ce que le matériau (9) de recouvrement de la virole (6) et de l'enveloppe génératrice d'éclats (7) est une résine époxyde.3. Explosive device according to one of the preceding claims, characterized in that the material (9) for covering the shell (6) and the casing generating splinters (7) is an epoxy resin. 4. Dispositif explosif selon l'une des revendication précédentes, caractérisé en ce que le matériau (9) de recouvrement de la virole (6) et de l'enveloppe génératrie d'éclats (7) est un oxyde d'aluminium.4. Explosive device according to one of the preceding claims, characterized in that the material (9) for covering the ferrule (6) and the generatrie casing of fragments (7) is an aluminum oxide. 5. Dispositif explosif selon la revendication 2, caractérisé en ce que le matériau de recouvrement de l'enveloppe génératrice d'éclats (7) est une gaine thermorétractable (17).5. Explosive device according to claim 2, characterized in that the covering material of the casing generating splinters (7) is a heat-shrinkable sheath (17). 6. Dispositif explosif selon la revendication 5, caractérisé en ce que la gaine thermorétractable (17) contient des éclats indépendants (19).6. Explosive device according to claim 5, characterized in that the heat-shrinkable sheath (17) contains independent fragments (19). 7. Dispositif explosif selon la revendication 1, caractérisé en ce qu'un relais renforçateur (2) du chargement explosif (1) est situé dans l'axe du chargement explosif principal et à environ mi-longueur de ce dernier.7. Explosive device according to claim 1, characterized in that a reinforcing relay (2) of the explosive charge (1) is located in the axis of the main explosive charge and at about half-length thereof. 8. Procédé pour réaliser une gerbe d'éclats à partir d'une enveloppe génératrice d'éclats positionnée sur la périphérie externe d'une virole (6) contenant un chargement explosif principal (1), caractérisé en ce qu'il consiste à introduire entre chacun des éléments constituant l'enveloppe génératrice d'éclats (7), un matériau (9) permettant un découplage entre les différents éclats et à recouvrir la périphérie externe de la virole (6) par ce même matériau, dont l'impédance mécanique est suffisamment différente de l'impédance mécanique des éclats pour éviter les soudures des éléments entre eux et avec la virole.8. Method for producing a sheaf of fragments from a fragment-generating envelope positioned on the external periphery of a shell (6) containing a main explosive charge (1), characterized in that it consists in introducing between each of the elements constituting the fragment-generating envelope (7), a material (9) allowing a decoupling between the different fragments and covering the outer periphery of the shell (6) with this same material, including the mechanical impedance is sufficiently different from the mechanical impedance of the splinters to avoid welding the elements together and with the ferrule. 9. Procédé selon la revendication 8, caractérisé en ce que la gerbe d'éclats est une gerbe focalisée.9. Method according to claim 8, characterized in that the sheaf of fragments is a focused sheaf. 10. Procédé selon la revendication 8, caractérisé en ce que le recouvrement de l'enveloppe génératrice (7) d'éclats par un matériau (9) est obtenu par imprégnation sous vide.10. Method according to claim 8, characterized in that the covering of the generating envelope (7) of fragments by a material (9) is obtained by vacuum impregnation. 11. Procédé selon la revendication 8, caractérisé en ce que le recouvrement de l'enveloppe génératrice d'éclats par un matériau (9) est obtenu par une métallisation au pistolet.11. Method according to claim 8, characterized in that the covering of the casing generating splinters by a material (9) is obtained by metallization with a gun. 12. Procédé selon la revendication 8, caractérisé en ce que le matériau (9) est une résine époxyde.12. Method according to claim 8, characterized in that the material (9) is an epoxy resin. 13. Procédé selon la revendication 8, caractérisé en ce que le matériau (9) est une gaine thermorétractable (17).13. Method according to claim 8, characterized in that the material (9) is a heat-shrinkable sheath (17). 14. Générateur d'éclats à gerbe d'éclats focalisée, caractérisé en ce qu'il comprend un dispositif explosif selon l'une des revendications précédentes.14. Fragment generator with a focused burst of shrapnel, characterized in that it comprises an explosive device according to one of the preceding claims.
EP90401282A 1989-06-02 1990-05-15 Explosive device with preformed splinters and manufacturing method therefor Withdrawn EP0401075A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8907311 1989-06-02
FR8907311A FR2647889B1 (en) 1989-06-02 1989-06-02 EXPLOSIVE DEVICE WITH PREFRAGMENTED FLASHES AND METHOD FOR PRODUCING SUCH A DEVICE

Publications (1)

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EP0401075A1 true EP0401075A1 (en) 1990-12-05

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EP90401282A Withdrawn EP0401075A1 (en) 1989-06-02 1990-05-15 Explosive device with preformed splinters and manufacturing method therefor

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EP (1) EP0401075A1 (en)
JP (1) JPH03181800A (en)
CA (1) CA2016146A1 (en)
FR (1) FR2647889B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0735342A4 (en) * 1994-09-15 1996-09-18 Kb Mash Round for destroying projectiles close to a defended object
EP1045222A3 (en) * 1999-04-16 2001-07-25 Diehl Munitionssysteme GmbH & Co. KG Shrapnel type projectile

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2992408B1 (en) * 2012-06-26 2014-06-13 Nexter Munitions MILITARY HEAD WITH CORE PROJECTION

Citations (6)

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Publication number Priority date Publication date Assignee Title
US2762303A (en) * 1951-05-22 1956-09-11 Cecil C Fawcett Hand grenade explodable into fragments of predetermined physical characteristics
US3027694A (en) * 1959-06-15 1962-04-03 B H Hadley Packaging rectangular objects and embedding them in a matrix
US3298308A (en) * 1960-11-11 1967-01-17 Aerojet General Co Composite casing for fragmentationtype explosive weapon and method of forming same
US3974771A (en) * 1967-06-26 1976-08-17 Bolkow Gesellschaft Mit Beschrankter Haftung Splinter warhead for guided flying bodies for combating aerial targets
US4057001A (en) * 1968-04-01 1977-11-08 Martin Marietta Corporation Endless carrier sleeve for discrete fragments
DE2821723A1 (en) * 1977-05-26 1978-11-30 Foerenade Fabriksverken LAYER OF SPLITTER ELEMENTS FOR AN EXPLOSIVE LOAD

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2762303A (en) * 1951-05-22 1956-09-11 Cecil C Fawcett Hand grenade explodable into fragments of predetermined physical characteristics
US3027694A (en) * 1959-06-15 1962-04-03 B H Hadley Packaging rectangular objects and embedding them in a matrix
US3298308A (en) * 1960-11-11 1967-01-17 Aerojet General Co Composite casing for fragmentationtype explosive weapon and method of forming same
US3974771A (en) * 1967-06-26 1976-08-17 Bolkow Gesellschaft Mit Beschrankter Haftung Splinter warhead for guided flying bodies for combating aerial targets
US4057001A (en) * 1968-04-01 1977-11-08 Martin Marietta Corporation Endless carrier sleeve for discrete fragments
DE2821723A1 (en) * 1977-05-26 1978-11-30 Foerenade Fabriksverken LAYER OF SPLITTER ELEMENTS FOR AN EXPLOSIVE LOAD

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0735342A4 (en) * 1994-09-15 1996-09-18 Kb Mash Round for destroying projectiles close to a defended object
EP0735342A1 (en) * 1994-09-15 1996-10-02 Konstruktorskoe Bjuro Mashinostroenia Round for destroying projectiles close to a defended object
EP1045222A3 (en) * 1999-04-16 2001-07-25 Diehl Munitionssysteme GmbH & Co. KG Shrapnel type projectile

Also Published As

Publication number Publication date
FR2647889A1 (en) 1990-12-07
FR2647889B1 (en) 1994-03-25
CA2016146A1 (en) 1990-12-02
JPH03181800A (en) 1991-08-07

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