EP0435830A1 - Method for manufacturing cartridge cases for firearms and cases obtained thereby - Google Patents

Method for manufacturing cartridge cases for firearms and cases obtained thereby Download PDF

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Publication number
EP0435830A1
EP0435830A1 EP90830153A EP90830153A EP0435830A1 EP 0435830 A1 EP0435830 A1 EP 0435830A1 EP 90830153 A EP90830153 A EP 90830153A EP 90830153 A EP90830153 A EP 90830153A EP 0435830 A1 EP0435830 A1 EP 0435830A1
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EP
European Patent Office
Prior art keywords
tube
base
reinforcement piece
collar
piece
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90830153A
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German (de)
French (fr)
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EP0435830B1 (en
Inventor
Jensen Mette
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Gordon Consulting Engineering & Marketing Ltd
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Gordon Consulting Engineering & Marketing Ltd
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Priority to AT90830153T priority Critical patent/ATE99044T1/en
Publication of EP0435830A1 publication Critical patent/EP0435830A1/en
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Publication of EP0435830B1 publication Critical patent/EP0435830B1/en
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    • 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
    • F42B5/26—Cartridge cases
    • F42B5/30—Cartridge cases of plastics, i.e. the cartridge-case tube is of plastics
    • F42B5/307—Cartridge cases of plastics, i.e. the cartridge-case tube is of plastics formed by assembling several elements

Definitions

  • the present invention relates to a method for manufacturing cartridge cases for firearms of the three-element type, and to the case thus obtained.
  • the most widely followed manufacturing method for manufacturing "three-element" type sockets involves the use of a plastic or paper tube, a cylindrical reinforcement piece also of plastic or paper and d 'a metal base.
  • the base has a cylindrical shape, is essentially closed at one of its ends and has, along the perimeter edge of this end, a bulge or collar defining inside the base a notch acting as a housing.
  • the base also provides a central hole in which a capsule is introduced for igniting the powder.
  • the tube is cylindrical and intended to be introduced into the base at least until it contacts the closed end of the latter. the tube could indeed have its peripheral end edge folded towards the axis of the tube itself for a reason which will be clarified later.
  • the reinforcement piece is also cylindrical on the outside and is provided with a central hole which must be coaxial with the hole in the base to accommodate the capsule therein.
  • the room reinforcement is likewise formed of deformable material, for a reason which will appear obvious from the description of the process carried out here.
  • the reinforcement piece is introduced into one end of the tube and this end is introduced into the base at least until when it is in contact with the closed base of said base. If the tube has a folded edge as said above, the reinforcement piece is inserted into the tube and brought into contact with this folded edge. Then, after having correctly positioned the three elements and having properly retained them, a compression action is exerted on the reinforcement piece which, through this forcing operation, must fulfill two fundamental functions. The first is that of clamping the tube against the interior surface of the base and the second is that of radially deforming the end of the tube so as to force it into the housing defined by the collar of the base.
  • the same working step also aims to ensure that the base of the socket, where the capsule is located and which consists of the reinforcement piece and the base, offers rigid resistance to the striker when the latter strikes the primer or capsule.
  • the rigidity and resistance characteristics can be ensured only by the impossibility of relative slippages between the elements and must be calculated very precisely in order to avoid anomalous ignitions or the non-ignition of the primer and therefore of the powder. .
  • Another object of the invention which must be achieved by the same working step is that of eliminating or minimizing the losses of combustion gases which tend to occur between the tube and the reinforcement piece and which, by the deformation of the base, modify the dimensional structure of the socket.
  • the present invention therefore aims to allow the manufacture of cartridge cases, of the "three-element" type, for firearms, for which it is possible to ensure, during any unloading step, the maintenance of the junction between said three elements without requiring the intervention of considerable compressive forces which during the assembly step of the sleeve could deform one or more elements forming the sleeve and modify the geometry thereof.
  • Another object of the invention is to allow the manufacture of the sockets in a simple, rational and economical manner, eliminating the drawbacks mentioned above.
  • the method according to the invention makes it possible to manufacture sockets, generally indicated in 1, composed of three elements, that is to say a cylindrical tube 2, a reinforcement piece 3 to be inserted in the tube 2 and a base 4.
  • the reinforcing piece 3 is made of a material which is substantially non-deformable and that it is already shaped so as to have at least one perimeter end tooth 31 projecting from the reinforcing piece.
  • the perimeter tooth 31 has an outside diameter of maximum overall dimensions 3d larger than the outside diameter 2d of the tube 2 and it is tapered towards the cylindrical perimeter surface of the reinforcement piece 3.
  • non-deformable should not be taken in an absolute sense, but it only means that the reinforcement piece 3 does not undergo significant deformations during all the steps of the process according to the invention.
  • the method according to the invention provides that the base 4 is also suitably shaped and that it is formed of two portions 41 and 42 coaxial and of different internal diameters, 41d and 42d respectively.
  • the smaller diameter 41d is essentially equal to the outside diameter 2d of the tube 2 while the larger diameter 42d is essentially equal to the maximum diameter 3d of the perimeter tooth 31 of the reinforcement piece 3.
  • the connecting portion 43 portions 41 and 42 constitute for the base 4 a tapered collar of nanometer corresponding to the perimeter tooth 31 and defining, inside the collar 43, a housing indicated in 45 of dimensions sufficient to receive both the perimeter tooth 31 and the one end of the tube 2.
  • the length 1 of the end 21 of the tube 2 can vary from the minimum value described, which allows the use of a reinforcement piece 3 whose perimeter tooth 31 is inserted directly in contact with the interior wall of the portion 42 of the base 4 (see Figure 4), up to a value greater than the axial dimension of the tooth 31 measured parallel to its generatrix, so that the end 21 of the tube 2 extends towards the portion 42 of the base 4 au- beyond the perimeter tooth 31 (see Figure 5).
  • the diameter 3d of the perimeter tooth 31 must be substantially equal to the diameter 42d of the portion 42 of the base 4 minus twice the thickness s of the tube 2.
  • the method according to the present invention provides for using already shaped elements and assembling them by joining them together, by means of the exploitation of their conformation which remains unchanged during all the stages of assembly.
  • the maintenance of the connection between the tube 2, the reinforcement piece 3 and the base 4 is ensured by geometric shapes which are perfectly visible and which can be checked before the assembly step and which remain unchanged during the same step.
  • a socket 1 obtained by implementing the method of the invention and illustrated in FIG. 4, we can already notice that it consists of a tube 2 surrounded by a base 4 with open bases and by a reinforcement piece 3 inserted inside the tube 2 and shaped so as to have, at one of its ends, a perimeter tooth 31 projecting from the piece 3 itself.
  • the part 38 of the reinforcing part 3 intended to come into contact with the powder can also be provided with reliefs 33 arranged along the periphery of an axial hole 32 formed in the reinforcement part 3 for housing a capsule 5 for igniting the powder.
  • the reliefs 33 have the task of preventing the powder 6 which will be introduced and compressed in the hollow 38 from being able to smother the flame of the capsule 5 housed in the respective hole 32.
  • the reliefs 33 for example in the form of strips extending along radial directions of the hole 32, serve to increase the flame front for the capsule 5.
  • the axial hole 32 of the reinforcement piece 3 can be produced in different ways in order to allow the accommodation inside of it of different types of capsules 5: for example, a rigid element 34 can be provided inside the hole 32 forming an anvil for a capsule of known type called "Berdan" (see Figure 7).
  • the reinforcement piece 3 can have a perimeter groove 35 outside. Between the groove 35 and the hollow 38 there is the interposition of a partition 37 which can bend under the push of the powder during of the shot.
  • a partition 37 which can bend under the push of the powder during of the shot.
  • the wall 37 does not undergo any deformation during the stages of assembly of the three elements forming the bush 1 and under the action of the forces at play during these stages, but it undergoes a deformation, which on the other hand is expected, after these stages and when it is subjected to forces much higher in absolute value than those exerted during the steps of the process according to the invention.
  • the reinforcing part 3 is in fact provided, on the side on which the edge of the portion 42 forming part of the base 4 is provided for, relief means 36 obtained from different ways, for example through blind holes. This is made possible by the fact that the reinforcing part does not undergo any considerable deformation during the assembly steps of the sleeve 1 and therefore, since its conformation does not undergo any change, it can be provided in any shape. provided it has the perimeter tooth 31.

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  • General Engineering & Computer Science (AREA)
  • Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Glass Compositions (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Dry Development In Electrophotography (AREA)
  • Radiation-Therapy Devices (AREA)
  • Prostheses (AREA)
  • Powder Metallurgy (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Fire-Extinguishing Compositions (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Automatic Tape Cassette Changers (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Saccharide Compounds (AREA)

Abstract

The method according to the invention, which allows the manufacture of cartridge cases for firearms of the type having three elements represented by a cylindrical tube (2), a strengthening part (3) which can be arranged in the tube (2) and a base (4) capable of fitting over the tube (2) provides for: the use of a strengthening part (3) obtained from an almost non-deformable material and already provided with at least one end-tooth (31) on the perimeter and protruding from the said part, the use of a base (4) having an open bottom and of different diameters provided for the formation of an annular tapered collar (43) defining a housing (45) in which can be received the anchoring tooth (31) of the strengthening part (3) and one of the ends (21) of the tube (2); and the formation of the case (1) by the insertion of the tube (2) into the base (4) in such a way that it protrudes beyond the portion (41) of smaller diameter of the base (4), by the insertion of the strengthening part (3) firstly into the base (4) and then into the tube (2) in such a way as to fold the respective end portion (21) until contact with the wall of the housing (45) defined by the collar (43) of the base (4) and finally by the folding of the portion of larger diameter (42) of the base (4) in such a way as to bring it into contact with the strengthening part (3). <IMAGE>

Description

La présente invention se réfère à un procédé pour la fabrication de douilles de cartouches pour armes à feu du type à trois éléments, et à la douille ainsi obtenue.The present invention relates to a method for manufacturing cartridge cases for firearms of the three-element type, and to the case thus obtained.

Actuellement les douilles pour armes à feu et notamment les douilles de cartouches de chasse et de tir, pour des raisons économiques concernant tant la production que l'utilisation du fait qu'une fois utilisées elles sont jetées dans la plupart des cas, sont fabriquées en plusieurs parties solidarisées entre elles et formées seulement en moindre partie de matière de valeur et coûteuse comme par exemple un métal.Currently the casings for firearms and in particular the casings of hunting cartridges and shooting, for economic reasons concerning both the production and the use of the fact that once used they are thrown in most cases, are manufactured in several parts joined together and formed only in the smallest part of valuable and costly material such as for example a metal.

Le procédé de fabrication le plus suivi pour la fabrication de douilles du type "à trois éléments" prévoit l'utilisation d'un tube de matière plastique ou de papier, d'une pièce de renforcement cylindrique également de matière plastique ou de papier et d'un culot de métal.The most widely followed manufacturing method for manufacturing "three-element" type sockets involves the use of a plastic or paper tube, a cylindrical reinforcement piece also of plastic or paper and d 'a metal base.

Le culot a une forme cylindrique, est essentiellement fermé à l'une de ses extrémités et présente, le long du bord périmétral de cette extrémité, un renflement ou collier définissant à l'intérieur du culot une encoche faisant fonction de logement. Le culot prévoit également un trou central dans lequel est introduite une capsule pour l'allumage de la poudre. Le tube est cylindrique et destiné à être introduit dans le culot du moins jusqu'au contact de l'extrémité fermée de ce dernier. le tube pourrait en effet avoir son bord périphérique d'extrémité replié vers l'axe du tube lui-même pour une raison qui sera éclaircie par la suite. La pièce de renforcement est également cylindrique à son extérieur et est pourvue d'un trou central qui doit être coaxial avec le trou du culot pour y loger la capsule. La pièce de renforcement est de même formée de matière déformable, pour une raison qui apparaîtra évidente de la description du procédé ici réalisé.The base has a cylindrical shape, is essentially closed at one of its ends and has, along the perimeter edge of this end, a bulge or collar defining inside the base a notch acting as a housing. The base also provides a central hole in which a capsule is introduced for igniting the powder. The tube is cylindrical and intended to be introduced into the base at least until it contacts the closed end of the latter. the tube could indeed have its peripheral end edge folded towards the axis of the tube itself for a reason which will be clarified later. The reinforcement piece is also cylindrical on the outside and is provided with a central hole which must be coaxial with the hole in the base to accommodate the capsule therein. The room reinforcement is likewise formed of deformable material, for a reason which will appear obvious from the description of the process carried out here.

On introduit, par exemple, la pièce de renforcement dans une extrémité du tube et on introduit cette extrémité dans le culot du moins jusqu'à quand elle est en contact avec la base fermée dudit culot. Si le tube a un bord replié comme dit plus haut, la pièce de renforcement est insérée dans le tube et amenée au contact de ce bord replié. Ensuite, après avoir correctement mis en place les trois éléments et les avoir convenablement retenus, on exerce une action de compression sur la pièce de renforcement qui à travers cette opération de forcement doit accomplir deux fonctions fondamentales. La première est celle de serrer le tube contre la surface intérieure du culot et la deuxième est celle de déformer radialement l'extrémité du tube de manière à le forcer dans le logement défini par le collier du culot. Il est évident que pendant cette opération les matériaux du tube et surtout de la pièce de renforcement sont soumis à des contraintes mécaniques non négligeables qui peuvent endommager irréparablement cette pièce, si elles ne sont pas contrôlées de manière correcte. Par exemple, en prenant en considération la zone du tube concernée par la pièce de renforcement et par le culot, si l'on exerce sur la pièce de renforcement une force ayant une intensité supérieure à celle prévue, on pourrait obtenir comme résultat un écrasement trop fort du tube et par conséquent aussi un affaiblissement à la traction, ce qui compromettrait la résistance lors de la décharge.For example, the reinforcement piece is introduced into one end of the tube and this end is introduced into the base at least until when it is in contact with the closed base of said base. If the tube has a folded edge as said above, the reinforcement piece is inserted into the tube and brought into contact with this folded edge. Then, after having correctly positioned the three elements and having properly retained them, a compression action is exerted on the reinforcement piece which, through this forcing operation, must fulfill two fundamental functions. The first is that of clamping the tube against the interior surface of the base and the second is that of radially deforming the end of the tube so as to force it into the housing defined by the collar of the base. It is obvious that during this operation the materials of the tube and especially of the reinforcement part are subjected to significant mechanical stresses which can irreparably damage this part, if they are not checked in a correct way. For example, taking into consideration the zone of the tube concerned by the reinforcement part and by the base, if a force having a force greater than that expected is exerted on the reinforcement part, it could result in too much crushing. strong tube and therefore also a weakening in traction, which would compromise the resistance during discharge.

Cette étape de travail compliquée et délicate est en tout cas indispensable pour éviter le risque que le tube, lors du coup de feu, se sépare du culot et entre dans le canon du fusil, ce qui entraînerait des conséquences dangereuses.This complicated and delicate work step is in any case essential to avoid the risk that the tube, during the shot, separates from the base and enters the barrel of the rifle, which would lead to dangerous consequences.

La même étape de travail a également pour but de faire que la base de la douille, où se trouve la capsule et qui se compose de la pièce de renforcement et du culot, oppose une résistance rigide au percuteur au moment où ce dernier frappe l'amorce ou capsule. Les caractéristiques de rigidité et de résistance peuvent être assurées seulement par l'impossibilité de glissements relatifs entre les éléments et doivent être calculées de manière très précise en vue d'éviter des allumages anomales ou le non allumage de l'amorce et donc de la poudre.The same working step also aims to ensure that the base of the socket, where the capsule is located and which consists of the reinforcement piece and the base, offers rigid resistance to the striker when the latter strikes the primer or capsule. The rigidity and resistance characteristics can be ensured only by the impossibility of relative slippages between the elements and must be calculated very precisely in order to avoid anomalous ignitions or the non-ignition of the primer and therefore of the powder. .

Un autre but de l'invention qui doit être atteint par la même étape de travail est celui d'éliminer ou réduire au minimum les pertes des gaz de combustion qui ont tendance à se produire entre le tube et la pièce de renforcement et qui, par la déformation du culot, modifient la structure dimensionnelle de la douille.Another object of the invention which must be achieved by the same working step is that of eliminating or minimizing the losses of combustion gases which tend to occur between the tube and the reinforcement piece and which, by the deformation of the base, modify the dimensional structure of the socket.

Les problèmes intrinsèques sont nombreux; il faut d'abord prendre en considération la nécessité de machines très compliquées du point de vue technique et de puissance élevée. En effet, pour l'exécution de cette étape il faut exercer une force considérable dans un espace limité tel que la zone vide définie par la douille. En outre, l'élément qui vient contacter la pièce de renforcement et qui exerce sur celle-ci ladite force de compression doit avoir une conformation bien déterminée pour qu'elle puisse exercer cette force de manière correcte en vue d'assurer l'union intime des trois pièces et la nécessaire rigidité de la base de la douille.There are many intrinsic problems; one must first take into consideration the need for very complicated machines from a technical point of view and high power. Indeed, for the execution of this step it is necessary to exert a considerable force in a limited space such as the empty zone defined by the socket. In addition, the element which comes into contact with the reinforcement part and which exerts on it said compressive force must have a well-defined conformation so that it can exert this force correctly in order to ensure intimate union. of the three parts and the necessary rigidity of the base of the socket.

En outre, il faut également tenir compte de nombreux facteurs extérieurs négatifs qui peuvent nuire à l'opération et qui empêchent que les trois pièces se maintiennent solidaires entre elles. Parmi ces facteurs de préjudice il faut comprendre les dimensions réduites du logement défini par le collier, la difficulté de pénétration de manière uniforme et constante de la matière formant la pièce de renforcement et le tube dans le logement du collier en vue de former la conformation couramment dénommée "dent d'ancrage" et le retour élastique éventuel de la matière formant la pièce de renforcement.In addition, there are also many negative external factors that can hinder the operation and prevent the three parts from holding together. Among these factors of harm, we must understand the dimensions reduced housing defined by the collar, the difficulty of penetrating uniformly and constantly the material forming the reinforcement piece and the tube in the housing of the collar in order to form the conformation commonly called "anchor tooth" and the return possible elastic of the material forming the reinforcement part.

Tout ce qui précède est rendu encore plus difficile à cause des problèmes qui se posent de contrôler de manière non destructive, en utilisant des moyens techniques ou visuels, la formation parfaite de la dent périmétrale d'ancrage de la pièce de renforcement, qui est pratiquement le seul élément capable d'assurer la liaison entre les trois éléments.All of the above is made even more difficult because of the problems which arise in controlling non-destructively, using technical or visual means, the perfect formation of the perimeter tooth for anchoring the reinforcement piece, which is practically the only element capable of ensuring the connection between the three elements.

La présente invention a donc pour but de permettre la fabrication de douilles de cartouches, du type "à trois éléments", pour armes à feu, pour lesquelles on puisse assurer, pendant n'importe quelle étape de décharqe, le maintien de la jonction entre lesdits trois éléments sans demander l'intervention de forces considérables de compression qui pendant l'étape d'assemblage de la douille pourraient déformer un ou plusieurs éléments formant la douille et en modifier la géométrie.The present invention therefore aims to allow the manufacture of cartridge cases, of the "three-element" type, for firearms, for which it is possible to ensure, during any unloading step, the maintenance of the junction between said three elements without requiring the intervention of considerable compressive forces which during the assembly step of the sleeve could deform one or more elements forming the sleeve and modify the geometry thereof.

Un autre but de l'invention est celui de permettre la fabrication des douilles de manière simple, rationnelle et économique, en éliminant les inconvénients cités ci-dessus.Another object of the invention is to allow the manufacture of the sockets in a simple, rational and economical manner, eliminating the drawbacks mentioned above.

L'invention, telle qu'elle est caractérisée dans les revendications, résout le problème abordé par un procédé pour la fabrication de douilles de cartouches pour armes à feu et par une douille obtenue suivant ce procédé, dont les caractéristiques et les avantages ressortiront plus clairement de la description détaillée qui suit d'une forme d'exécution préférée donnée à simple titre d'exemple non limitatif à l'aide des dessins annexés, sur lesquels:

  • la figure 1 montre, en coupe axiale, les trois éléments formant la douille de cartouche pour armes à feu suivant la présente invention, ces éléments étant prêts pour la mise en oeuvre du procédé de l'invention;
  • les figures 2 à 4 montrent, en coupe axiale, les trois éléments représentés sur la figure 1 pendant les étapes faisant partie du procédé suivant l'invention;
  • la figure 5 montre, en coupe axiale, une forme d' exécution différente de la douille représentée sur la figure 4; et
  • les figures 6 à 8 illustrent trois formes différentes d'exécution de la pièce de renforcement représentée sur la figure 1.
The invention, as characterized in the claims, solves the problem addressed by a method for manufacturing cartridge cases for firearms and by a case obtained by this process, the characteristics and advantages of which will become more clearly apparent of the following detailed description of a preferred embodiment given simply non-limiting example using the appended drawings, in which:
  • Figure 1 shows, in axial section, the three elements forming the cartridge case for firearms according to the present invention, these elements being ready for the implementation of the method of the invention;
  • Figures 2 to 4 show, in axial section, the three elements shown in Figure 1 during the steps forming part of the method according to the invention;
  • Figure 5 shows, in axial section, a different embodiment of the socket shown in Figure 4; and
  • FIGS. 6 to 8 illustrate three different embodiments of the reinforcement piece shown in FIG. 1.

En se référant aux figures annexées, le procédé selon l'invention permet de fabriquer des douilles, indiquées généralement en 1, composées de trois éléments, c'est-à-dire un tube cylindrique 2, une pièce de renforcement 3 à insérer dans le tube 2 et un culot 4.Referring to the appended figures, the method according to the invention makes it possible to manufacture sockets, generally indicated in 1, composed of three elements, that is to say a cylindrical tube 2, a reinforcement piece 3 to be inserted in the tube 2 and a base 4.

Le procédé en question prévoit avant tout que la pièce de renforcement 3 soit fabriquée d'une matière sensiblement indéformable et qu'elle soit déjà façonnée de manière à présenter du moins une dent périmétrale d'extrémité 31 faisant saillie de la pièce de renforcement. La dent périmétrale 31 a un diamètre extérieur d'encombrement maximum 3d plus large que le diamètre extérieur 2d du tube 2 et elle est effilée vers la surface périmétrale cylindrique de la pièce de renforcement 3. Evidemment le terme "indéformable" ne doit pas être pris en sens absolu, mais il signifie seulement que la pièce de renforcement 3 ne subit pas de déformations importantes pendant toutes les étapes du procédé suivant l'invention. En outre, par le terme "indéformable" on désire différencier de manière bien précise la pièce de renforcement 3 caractérisant le procédé suivant l'invention des pièce de renforcement de type traditionnel lesquelles étaient drastiquement déformées avec modification de leurs formes géométriques et de leurs caractéristiques mécaniques: en effet, la forte compression avait également pour but d'augmenter la rigidité de la base du culot, mais pour obtenir ce résultat on devait réduire drastiquement les possibilités de choix des profils de la partie de la pièce de renforcement qui, quand la cartouche est terminée, se trouve au contact de la poudre.The method in question provides above all that the reinforcing piece 3 is made of a material which is substantially non-deformable and that it is already shaped so as to have at least one perimeter end tooth 31 projecting from the reinforcing piece. The perimeter tooth 31 has an outside diameter of maximum overall dimensions 3d larger than the outside diameter 2d of the tube 2 and it is tapered towards the cylindrical perimeter surface of the reinforcement piece 3. Obviously the term "non-deformable" should not be taken in an absolute sense, but it only means that the reinforcement piece 3 does not undergo significant deformations during all the steps of the process according to the invention. In addition, by the term "undeformable" we want to differentiate very clearly the reinforcement piece 3 characterizing the process according to the invention of the traditional type reinforcement pieces which were drastically deformed with modification of their geometric shapes and their mechanical characteristics: indeed, the strong compression was also intended to increase the rigidity of the base of the base, but to obtain this result, it was necessary to drastically reduce the possibilities of choosing the profiles of the part of the reinforcing part which, when the cartridge is finished, is in contact with the powder.

En outre, le procédé selon l'invention prévoit que le culot 4 soit lui aussi convenablement façonné et qu'il soit formé de deux portions 41 et 42 coaxiales et de diamètres intérieurs différents, respectivement 41d et 42d. Le diamètre 41d, plus petit, est essentiellement égal au diamètre extérieur 2d du tube 2 tandis que le diamètre 42d, plus large, est essentiellement égal au diamètre maximum 3d de la dent périmétrale 31 de la pièce de renforcement 3. La portion 43 de raccordement des portions 41 et 42 constitue pour le culot 4 un collier effilé de nanière correspondante à la dent périmétrale 31 et définissant, à l'intérieur du collier 43, un logement indiqué en 45 de dimensions suffisantes à recevoir tant la dent périmétrale 31 que l'une des extrémités du tube 2.In addition, the method according to the invention provides that the base 4 is also suitably shaped and that it is formed of two portions 41 and 42 coaxial and of different internal diameters, 41d and 42d respectively. The smaller diameter 41d is essentially equal to the outside diameter 2d of the tube 2 while the larger diameter 42d is essentially equal to the maximum diameter 3d of the perimeter tooth 31 of the reinforcement piece 3. The connecting portion 43 portions 41 and 42 constitute for the base 4 a tapered collar of nanometer corresponding to the perimeter tooth 31 and defining, inside the collar 43, a housing indicated in 45 of dimensions sufficient to receive both the perimeter tooth 31 and the one end of the tube 2.

Prenant en considérantion une pièce de renforcement 3 et un culot 4 structurés le la manière décrite ci-dessus, le procédé suivant l'invention prévoit les étapes suivantes:

  • introduction du tube 2 dans le culot 4 de manière que l'une des extrémités 21 du tube 2 dépasse la ligne, indiquée en 44, séparant du collier 43 la portion 41 sur une longueur 1 non inférieure à l'extension axiale de la dent périmétrale 31 (voir la figure 2);
  • introduction de la pièce de renforcement 3 dans le culot 4 et dans l'extrémité 21 du tube 2 jusqu'a forcer la dent périmétrale 31 dans l'extrémité correspondante 21 du tube 2 et de sorte que cette extrémité 21 soit déformée et amenée en contact avec la paroi du logement 45 (voir la figure 3); et
  • repliement de la portion 42 du culot 4 vers l'axe de ce dernier et jusqu'a l'amener au contact de la pièce de renforcement 3 (voir la figure 4).
Taking into consideration a reinforcement piece 3 and a base 4 structured in the manner described above, the method according to the invention provides for the following steps:
  • introduction of the tube 2 into the base 4 so that one of the ends 21 of the tube 2 exceeds the line, indicated at 44, separating from the collar 43 the portion 41 over a length 1 not less than the axial extension of the perimeter tooth 31 (see Figure 2);
  • introduction of the reinforcement piece 3 into the base 4 and into the end 21 of the tube 2 until forced the perimeter tooth 31 in the corresponding end 21 of the tube 2 and so that this end 21 is deformed and brought into contact with the wall of the housing 45 (see FIG. 3); and
  • folding of the portion 42 of the base 4 towards the axis of the latter and until bringing it into contact with the reinforcement part 3 (see FIG. 4).

La longueur 1 de l'extrémité 21 du tube 2 peut varier depuis la valeur minimum décrite, qui permet d'utiliser une pièce de renforcement 3 dont la dent périmétrale 31 est insérée directement au contact de la paroi intérieure de la portion 42 du culot 4 (voir la figure 4), jusqu'à une valeur plus grande que la dimension axiale de la dent 31 mesurée parallèlement à sa génératrice, de manière que l'extrémité 21 du tube 2 s'étend vers la portion 42 du culot 4 au-delà de la dent périmétrale 31 (voir la figure 5). Dans ce dernier cas le diamètre 3d de la dent périmétrale 31 devra être sensiblement égal au diamètre 42d de la portion 42 du culot 4 moins deux fois l'épaisseur s du tube 2.The length 1 of the end 21 of the tube 2 can vary from the minimum value described, which allows the use of a reinforcement piece 3 whose perimeter tooth 31 is inserted directly in contact with the interior wall of the portion 42 of the base 4 (see Figure 4), up to a value greater than the axial dimension of the tooth 31 measured parallel to its generatrix, so that the end 21 of the tube 2 extends towards the portion 42 of the base 4 au- beyond the perimeter tooth 31 (see Figure 5). In the latter case the diameter 3d of the perimeter tooth 31 must be substantially equal to the diameter 42d of the portion 42 of the base 4 minus twice the thickness s of the tube 2.

Il est évident que le procédé suivant la présente invention prévoit d'utiliser des éléments déjà façonnés et de les assembler en les solidarisant entre eux, moyennant l'exploitation de leur conformation qui reste inchangée pendant toutes les étapes de l'assemblage.It is obvious that the method according to the present invention provides for using already shaped elements and assembling them by joining them together, by means of the exploitation of their conformation which remains unchanged during all the stages of assembly.

En d'autres mots, le maintien de la liaison entre le tube 2, la pièce de renforcement 3 et le culot 4 est assuré par des formes géométriques qui sont parfaitement visibles et qui peuvent être contrôlées avant l'étape d'assemblage et qui restent inchangées pendant la même étape.In other words, the maintenance of the connection between the tube 2, the reinforcement piece 3 and the base 4 is ensured by geometric shapes which are perfectly visible and which can be checked before the assembly step and which remain unchanged during the same step.

Ceci signifie que la machine nécessaire pour bloquer réciproquement les trois éléments, à savoir pièce de renforcement 3, tube 2 et culot 4, est relativement simple et peu coûteuse, surtout si on la compare à celles couramment utilisées. Il en résulte une réduction drastique des frais généraux pour la production des douilles de manière à atteindre des importants avantages en termes d'économie de main d'oeuvre, de matières premières et d'entretien des installations. Dans les installations actuelles en effet, à cause des importantes forces en jeu qui agissent dans des espaces très réduits comme par exemple l'intérieur du tube, il faut effectuer un entretien continu des machines de plus grande précision et notamnent de la machine chargée de la compression. Du point de vue des matières premières, leur consommation est sans doute inférieure étant donné que le culot est ouvert au lieu d'être fermé comme dans l'art connu. En outre, grâce au procédé de l'invention on peut éliminer l'opération de repliement d'un bord du tube 2 dans le but d'améliorer la liaison entre les trois éléments.This means that the machine necessary to block the three elements, namely reinforcement piece 3, tube 2 and base 4, is relatively simple and inexpensive, especially when compared to those commonly used. This results in a drastic reduction in overhead costs for the production of the sockets so as to achieve significant advantages in terms of saving labor, raw materials and maintenance of the installations. In current installations, in fact, because of the large forces at play which act in very small spaces such as the interior of the tube, it is necessary to carry out continuous maintenance of the machines with greater precision and in particular of the machine in charge of the compression. From the point of view of raw materials, their consumption is undoubtedly lower since the pellet is open instead of being closed as in the known art. In addition, thanks to the method of the invention, it is possible to eliminate the operation of folding up an edge of the tube 2 in order to improve the connection between the three elements.

Si l'on regarde maintenant une douille 1 obtenue en mettant en oeuvre le procédé de l'invention et illustrée à la figure 4, on peut déjà remarquer qu'elle se compose d'un tube 2 entouré par un culot 4 à bases ouvertes et par une pièce de renforcement 3 introduite à l'intérieur du tube 2 et conformée de manière à avoir, à l'une de ses extrémités, une dent périmétrale 31 faisant saillie de la pièce 3 elle-même.If we now look at a socket 1 obtained by implementing the method of the invention and illustrated in FIG. 4, we can already notice that it consists of a tube 2 surrounded by a base 4 with open bases and by a reinforcement piece 3 inserted inside the tube 2 and shaped so as to have, at one of its ends, a perimeter tooth 31 projecting from the piece 3 itself.

Du fait que la pièce de renforcement 3 ne subit pas une importante déformation pendant l'étape d'assemblage, on peut Iui donner la conformation géométrique qui permet à la douille 1 le meilleur fonctionnement et le meilleur rendement balistique.Due to the fact that the reinforcing part 3 does not undergo a significant deformation during the assembly step, it is possible to give it the geometric conformation which allows the sleeve 1 to function better and to have the best ballistic efficiency.

Par exemple, la partie 38 de la pièce de renforcement 3 destinée à venir en contact avec la poudre, laquelle peut être par exemple en forme de creux tel que représenté sur les figures annexées, peut être également pourvue de reliefs 33 disposés le long du pourtour d'un trou axial 32 ménagé dans la pièce de renforcement 3 pour loger une capsule 5 d'allumage de la poudre. Les reliefs 33 ont pour tâche d'empêcher que la poudre 6 qui sera introduite et comprimée dans le creux 38, puisse étouffer la flamme de la capsule 5 logée dans le respectif trou 32. En d'autres mots, les reliefs 33, par exemple en forme de lamelles s'étendant le long de directions radiales du trou 32, servent à augmenter le front de flamme pour la capsule 5.For example, the part 38 of the reinforcing part 3 intended to come into contact with the powder, which can for example be in the form of a hollow as shown in the appended figures, can also be provided with reliefs 33 arranged along the periphery of an axial hole 32 formed in the reinforcement part 3 for housing a capsule 5 for igniting the powder. The reliefs 33 have the task of preventing the powder 6 which will be introduced and compressed in the hollow 38 from being able to smother the flame of the capsule 5 housed in the respective hole 32. In other words, the reliefs 33, for example in the form of strips extending along radial directions of the hole 32, serve to increase the flame front for the capsule 5.

Le trou axial 32 de la pièce de renforcement 3 peut être réalisé de différentes façons dans le but de permettre le logement à son intérieur de différents types de capsules 5: par exemple, on peut prévoir à l'intérieur du trou 32 un élément rigide 34 formant une enclume pour une capsule de type connu dénommée "Berdan" (voir la figure 7).The axial hole 32 of the reinforcement piece 3 can be produced in different ways in order to allow the accommodation inside of it of different types of capsules 5: for example, a rigid element 34 can be provided inside the hole 32 forming an anvil for a capsule of known type called "Berdan" (see Figure 7).

Encore (voir la figure 6), la pièce de renforcement 3 peut avoir à son extérieur un sillon périmétral 35. Entre le sillon 35 et le creux 38 il y a l'interposition dune cloison 37 qui peut fléchir sous la poussée de la poudre lors du coup de feu. Dans cette forme d'exécution, par exemple, on prévoit la création d'une paroi 37 capable de fléchir et ceci en harmonie avec le concept décrit précédemment de sensible indéformabilité de la pièce de renforcement 3. En effet la paroi 37 ne subit aucune déformation pendant les étapes d'assemblage des trois éléments formant la douille 1 et sous l'action des forces en jeu pendant ces étapes, mais elle subit une déformation, qui d'autre part est prévue, après ces étapes et quand elle est soumise à des forces bien plus élevées en valeur absolue que celles exercées pendant les étapes du procédé suivant l'invention.Again (see FIG. 6), the reinforcement piece 3 can have a perimeter groove 35 outside. Between the groove 35 and the hollow 38 there is the interposition of a partition 37 which can bend under the push of the powder during of the shot. In this embodiment, for example, provision is made for the creation of a wall 37 capable of bending and this in harmony with the concept described above of sensitive non-deformability of the reinforcement piece 3. In fact the wall 37 does not undergo any deformation during the stages of assembly of the three elements forming the bush 1 and under the action of the forces at play during these stages, but it undergoes a deformation, which on the other hand is expected, after these stages and when it is subjected to forces much higher in absolute value than those exerted during the steps of the process according to the invention.

Sur la figure 8 on a représenté une forme d'exécution particulièrement intéressante en ce qui concerne l'économie de matières premières: la pièce de renforcement 3 est en effet pourvue, du côté sur lequel on prévoit le repliement du bord de la portion 42 faisant partie du culot 4, de moyens de soulagement 36 obtenus de différentes façons, par exemple moyennant des trous borgnes. Ceci est rendu possible du fait que la pièce de renforcement ne subit aucune déformation considérable pendant les étapes d'assemblage de la douille 1 et par conséquent, étant donné que sa conformation ne subit aucun changement, elle peut être prévue de n'importe quelle forme à la condition qu'elle ait la dent périmétrale 31.In Figure 8 there is shown an embodiment particularly advantageous as regards the saving of raw materials: the reinforcing part 3 is in fact provided, on the side on which the edge of the portion 42 forming part of the base 4 is provided for, relief means 36 obtained from different ways, for example through blind holes. This is made possible by the fact that the reinforcing part does not undergo any considerable deformation during the assembly steps of the sleeve 1 and therefore, since its conformation does not undergo any change, it can be provided in any shape. provided it has the perimeter tooth 31.

Il est évident que, pouvant varier presque à volonté la forme géométrique de la pièce de renforcement 3 en fonction des caractéristiques que l'on désire donner à la douille, ce qui ne se produit pas pour les pièces de renforcement de l'art connu, cette pièce 3 devient "active", étant donné qu'une variation de sa forme porte a un comportement différent de la cartouche.It is obvious that, being able to vary almost at will the geometric shape of the reinforcement piece 3 as a function of the characteristics which it is desired to give to the socket, which does not happen for the reinforcement pieces of the known art, this part 3 becomes "active", since a variation in its door shape has a different behavior from the cartridge.

L'invention ainsi concue est susceptible de nombreuses modifications et variantes qui rentrent toutes dans le cadre de protection de l'invention. En outre, tous les détails peuvent être remplacés par des éléments techniquement équivalents.The invention thus conceived is susceptible of numerous modifications and variants which all come within the scope of protection of the invention. In addition, all details may be replaced by technically equivalent elements.

Claims (14)

Procédé pour la fabrication de douilles de cartouches pour armes à feu du type à trois éléments représentés par un tube (2) cylindrique, une pièce de renforcement (3) à insérer à l'intérieur de l'une des extrémités du tube (2) et un culot (4) susceptible d'entourer du moins l'extrémité du tube (2) concernée par la pièce de renforcement (3), caractérisé en ce qu'il prévoit que: - la pièce de renforcement (3) soit produite en matière sensiblement indéformable et façonnée de manière à présenter, à l'une de ses extrémités, un rebord ou une dent périmétrale d'ancrage (31) dépassant latéralement la même pièce de renforcement (3); ladite dent périmétraie (31) ayant un diamètre extérieur d'encombrement maximum non inférieur à celui extérieur du tube (2) et s'effilant vers la surface périmétrale cylindrique de la pièce de renforcement (3); - le culot (4) soit réalisé à bases ouvertes et en deux portions (41, 42) consécutives coaxiales ayant des diamètres intérieurs différents (41d, 42d); le plus petit (41d) des deux diamètres intérieurs étant sensiblement égal à celui extérieur du tube (2) et le plus grand (42d) étant sensiblement égal au diamètre extérieur de la dent périmétrale (31) de la pièce de renforcement (3); la zone de raccordement (43) entre les deux portions (41, 42) de diamètre intérieur différent du culot (4) étant effilée selon une forme correspondant avec celle de la dent périmétrale (31) de ladite pièce de renforcement (3) et formant un collier (43) concrétisant un logement à l'intérieur du culot (4) destiné a recevoir ladite dent périmétrale (31) de la pièce de renforcement et l'extrémite (21) du tube (2);
et en ce qu'il prévoit les étapes suivantes: - introduction du tube (2) dans le culot (4) de manière que l'une des extrémités (21) du tube (2) dépasse la ligne (44) de jonction entre la portion de diamètre plus petit (41) et le collier (43) du culot (4), sur une portion (21) de longueur (1) non inférieure à l'extension axiale dudit collier (43); - introduction de la pièce de renforcement (3) dans la portion de diamètre plus grand (42) du culot 4 et dans le tube (2) jusqu'a forcer la dent d'ancrage (31) de la pièce de renforcement (3) contre l'extrémité libre correspondante (21) du tube (2) et jusqu'à forcer cette dernière, à l'aide de ladite dent d'ancrage (31) restée indéformée, contre le collier (43) du culot (4) de sorte que cette extrémite (21) du tube (2) adhère parfaitement à la surface du logement défini par ledit collier (43); - repliement, par sertissage, laminage ou autres, de la portion de plus grand diamètre du culot (4) jusqu'a l'amener au contact de la pièce de renforcement (3) contenue à son intérieur. Method for manufacturing cartridge cases for firearms of the three-element type represented by a cylindrical tube (2), a reinforcement piece (3) to be inserted inside one of the ends of the tube (2) and a base (4) capable of surrounding at least the end of the tube (2) concerned by the reinforcement piece (3), characterized in that it provides: - the reinforcement piece (3) is produced from a material that is substantially non-deformable and shaped so as to have, at one of its ends, a flange or a perimeter anchoring tooth (31) laterally projecting from the same reinforcement piece (3 ); said perimeter tooth (31) having an outside diameter of maximum overall dimensions not less than that outside of the tube (2) and tapering towards the cylindrical perimeter surface of the reinforcement piece (3); - The base (4) is made with open bases and in two consecutive coaxial portions (41, 42) having different internal diameters (41d, 42d); the smaller (41d) of the two inner diameters being substantially equal to the outer diameter of the tube (2) and the larger (42d) being substantially equal to the outer diameter of the perimeter tooth (31) of the reinforcement piece (3); the connection zone (43) between the two portions (41, 42) of different internal diameter of the base (4) being tapered in a shape corresponding to that of the perimeter tooth (31) of said reinforcement piece (3) and forming a collar (43) embodying a housing inside the base (4) intended to receive said perimeter tooth (31) of the reinforcement piece and the end (21) of the tube (2);
and in that it provides for the following stages: - introduction of the tube (2) into the base (4) so that one of the ends (21) of the tube (2) exceeds the line (44) of junction between the portion of smaller diameter (41) and the collar (43) of the base (4), on a portion (21) of length (1) not less than the axial extension of said collar (43); - introduction of the reinforcement piece (3) into the larger diameter portion (42) of the base 4 and into the tube (2) until the anchoring tooth (31) of the reinforcement piece (3) is forced against the corresponding free end (21) of the tube (2) and until the latter is forced, using said anchoring tooth (31) which remains undeformed, against the collar (43) of the base (4) of so that this end (21) of the tube (2) adheres perfectly to the surface of the housing defined by said collar (43); - Folding, by crimping, rolling or other, of the portion of larger diameter of the base (4) until bringing it into contact with the reinforcement piece (3) contained inside. Procédé selon la revendication 1, caractérisé en ce que le diamètre extérieur (3d) de la dent périmétrale (31) de la pièce de renforcement (3) est sensiblement égal au plus grand diamètre intérieur (42d) dudit culot (4) moins deux fois l'épaisseur dudit tube (2).Method according to claim 1, characterized in that the outside diameter (3d) of the perimeter tooth (31) of the reinforcement piece (3) is substantially equal to the largest inside diameter (42d) of said base (4) minus twice the thickness of said tube (2). Procédé selon la revendication 1, caractérisé en ce que ledit tube (2) déborde au-delà de la ligne (44) de jonction entre la portion de diamètre plus petit (41) et le collier (43) du culot (4) sur une portion (21) de longueur (1) non inférieure à l'extension axiale dudit collier (43) mesurée parallèlement à l'une de ses génératrices.Method according to claim 1, characterized in that the said tube (2) projects beyond the line (44) of junction between the portion of smaller diameter (41) and the collar (43) of the base (4) on a portion (21) of length (1) not less than the axial extension of said collar (43) measured parallel to one of its generatrices. Procédé selon la revendication 1, caractérisé en ce que ledit tube (2) déborde au-delà de la ligne (44) de jonction entre la portion de diamètre plus petit (41) et le collier (43) du culot (4) sur une portion (21) de longueur (1) non inférieure à l'extension axiale dudit collier (43) mesurée parallèlement à l'une de ses génératrices et telle que, quand la pièce de renforcement (3) est complètement introduite dans le culot (4) et le tube (2), ce dernier ne fait pas saillie de ladite pièce de renforcement (3).Method according to claim 1, characterized in that the said tube (2) projects beyond the line (44) of junction between the portion of smaller diameter (41) and the collar (43) of the base (4) on a portion (21) of length (1) not less than the axial extension of said collar (43) measured parallel to one of its generatrices and such that, when the piece of reinforcement (3) is completely introduced into the base (4) and the tube (2), the latter does not protrude from said reinforcement piece (3). Procédé selon la revendication 1, caractérisé en ce que ledit tube (2) déborde au-delà de la ligne (44) de jonction entre la portion de diamètre plus petit (41) et le collier (43) du culot (4) sur une portion (21) de longueur (1) non inférieure à l'extension axiale dudit collier (43) mesurée parallèlement à l'une de ses génératrices et telle que, quand la pièce de renforcement (3) est complètement introduite dans le culot (4) et le tube (2), ce dernier fait saillie au-delà de ladite pièce de renforcement (3) et est comprimé entre la surface de la base correspondante du culot (4) et le bord du culot (4) replié sur ce dernier.Method according to claim 1, characterized in that the said tube (2) projects beyond the line (44) of junction between the portion of smaller diameter (41) and the collar (43) of the base (4) on a portion (21) of length (1) not less than the axial extension of said collar (43) measured parallel to one of its generatrices and such that, when the reinforcement piece (3) is completely inserted into the base (4 ) and the tube (2), the latter protrudes beyond said reinforcement piece (3) and is compressed between the surface of the corresponding base of the base (4) and the edge of the base (4) folded over the latter . Douille du type composé de trois éléments représentés par un tube (2), une pièce de renforcement (3) insérée dans le tube (2) et un culot (4) entourant l'extrémité du tube (2) concernée par la pièce de renforcement (3), et obtenue en mettant en oeuvre le procédé selon les revendications précédentes, caractérisée en ce que le culot (4) est de forme tubulaire cylindrique et a les deux bases ouvertes et de diamètres différents de manière à concrétiser un collier (43) définissant à l'intérieur du culot (4) un logement (45), et ladite pièce de renforcement (3) est produite en matière sensiblement indéformable et est façonnée de manière à avoir à l'une de ses extrémités, indépendamment de l'étape d'assemblage de la douille, une dent périmétrale (31) continue d'ancrage destinée à être logée, ensemble avec l'une des extrémités (21) du tube (2), dans le logement (45) défini par le collier (43) du culot (4); le bord d'extrémité de la portion (42) de plus grand diamètre du culot (4) étant replié vers l'axe de ce dernier de manière à boucher ledit logement (45) défini par le collier (43) et serrer ainsi la dent périmétrale (31) de la pièce de renforcement (3) et l'extrémité correspondante (21) du tube (2) contre la paroi intérieure dudit collier (43) définissant ledit logement (45).Socket of the type made up of three elements represented by a tube (2), a reinforcement piece (3) inserted in the tube (2) and a base (4) surrounding the end of the tube (2) concerned by the reinforcement piece (3), and obtained by implementing the method according to the preceding claims, characterized in that the base (4) is of cylindrical tubular shape and has the two open bases and of different diameters so as to materialize a collar (43) defining inside the base (4) a housing (45), and said reinforcement piece (3) is produced from material which is substantially non-deformable and is shaped so as to have at one of its ends, independently of the step assembly sleeve, a continuous perimeter tooth (31) intended to be housed, together with one of the ends (21) of the tube (2), in the housing (45) defined by the collar (43 ) of the base (4); the end edge of the portion (42) of larger diameter of the base (4) being folded towards the axis of the latter so as to block said housing (45) defined by the collar (43) and thus tighten the tooth perimeter (31) of the reinforcement piece (3) and the corresponding end (21) of the tube (2) against the interior wall of said collar (43) defining said housing (45). Douille selon la revendication 6, dans laquelle la pièce de renforcement (3) est pourvue d'un trou axial (32), caractérisée en ce qu'elle présente, à l'extrémité dudit trou axial (32) de la pièce de renforcement (3) et du côté de ce dernier destiné à venir en contact avec la poudre (6), une pluralité de reliefs (33) susceptibles d'empêcher que la poudre contenue dans le tube (2) puisse étouffer la flamme de la capsule (5).Sleeve according to claim 6, in which the reinforcing piece (3) is provided with an axial hole (32), characterized in that it has, at the end of said axial hole (32), the reinforcing piece ( 3) and on the side of the latter intended to come into contact with the powder (6), a plurality of reliefs (33) capable of preventing the powder contained in the tube (2) from smothering the flame of the capsule (5 ). Douille selon la revendication 7, caractérisée en ce que les reliefs (33) offerts par ladite pièce de renforcement (3) dans la zone du trou axial (32) respectif et du côté destiné à venir en contact avec la poudre se composent d'un égal nombre de lamelles disposées le long de directions radiales de la pièce de renforcement (3).Socket according to claim 7, characterized in that the reliefs (33) offered by said reinforcement piece (3) in the region of the respective axial hole (32) and on the side intended to come into contact with the powder consist of a equal number of lamellae arranged along radial directions of the reinforcement piece (3). Douille selon la revendication 1, caractérisée en ce que le trou axial (32) de ladite pièce de renforcement (3) est de forme conjuguée avec celle de la capsule (5) qui est logée à son intérieur.Socket according to claim 1, characterized in that the axial hole (32) of said reinforcement piece (3) is of form conjugated with that of the capsule (5) which is housed therein. Douille selon la revendication 9, caractérisée en ce que ladite pièce de renforcement (3) est pourvue à l'intérieur de son trou axial (32) d'un élément (34) qui est coaxial avec le trou et qui forme une enclume pour la capsule (5) qui doit être logée à l'intérieur du même trou axial (32) lequel n'est pas complètement occupé par ledit élément en forme d'enclume.Socket according to claim 9, characterized in that said reinforcing piece (3) is provided inside its axial hole (32) with an element (34) which is coaxial with the hole and which forms an anvil for the capsule (5) which must be housed inside the same axial hole (32) which is not completely occupied by said anvil-shaped element. Douille selon la revendication 6, caractérisée en ce que ladite pièce de renforcement (3) est façonnée de manière à avoir, indépendamment de l'étape d'assemblage de la douille, une conformation qui est fonction d'un meilleur rendement balistique de sa part et d'une sécurité intrinsèque plus élevée.Socket according to claim 6, characterized in that said reinforcing piece (3) is shaped so as to have, independently of the assembly step of the sleeve, a conformation which is a function of better ballistic performance on its part and of higher intrinsic safety. Douille selon la revendication 6, caractérisée en ce que ladite pièce de renforcement (3) est façonnée de manière à avoir, indépendamment de l'étape d'assemblage de la douille, une conformation qui la rend susceptible de céder axialement, du moins sur sa portion la plus intérieure dans ledit tube (2), sous la poussée exercée par la poudre (6) en cours de combustion.Socket according to claim 6, characterized in that said reinforcing piece (3) is shaped so as to have, independently of the step of assembling the socket, a conformation which makes it liable to give way axially, at least on its innermost portion in said tube (2), under the thrust exerted by the powder (6) during combustion. Douille selon la revendication 12, caractérisée en ce que ladite pièce de renforcement (3) est pourvue d'un sillon (35) périmétral séparé de la poudre au moyen d'une cloison (37) d'épaisseur suffisamment mince pour qu'elle puisse fléchir sous la poussée exercée par la poudre (6) en cours de combustion.Sleeve according to claim 12, characterized in that the said reinforcing part (3) is provided with a perimeter groove (35) separated from the powder by means of a partition (37) of thickness sufficiently thin so that it can flex under the pressure exerted by the powder (6) during combustion. Douille selon la revendication 6, caractérisée en ce que ladite pièce de renforcement (3), sur son côté qui n'est pas destiné à venir en contact avec la poudre, est pourvue d'au moins une encoche ou trou de soulagement (36).Sleeve according to claim 6, characterized in that said reinforcing part (3), on its side which is not intended to come into contact with the powder, is provided with at least one notch or relief hole (36) .
EP90830153A 1989-12-22 1990-04-06 Method for manufacturing cartridge cases for firearms and cases obtained thereby Expired - Lifetime EP0435830B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90830153T ATE99044T1 (en) 1989-12-22 1990-04-06 PROCESS FOR THE MANUFACTURE OF CARTRIDGE CASES FOR FIREARMS AND CASES MANUFACTURED WITH THEM.

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IT378489 1989-12-22
IT3784A IT1235986B (en) 1989-12-22 1989-12-22 METHOD FOR THE REALIZATION OF BOSSOLI FOR FIREARMS AND BOSSOLO SO OBTAINED

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EP0435830A1 true EP0435830A1 (en) 1991-07-03
EP0435830B1 EP0435830B1 (en) 1993-12-22

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5710391A (en) * 1993-10-12 1998-01-20 Chetcuti; Francis Recoil reducer wad for ammunition
WO1998048238A1 (en) * 1997-04-21 1998-10-29 Tomscot Hb Shotgun cartridge case-sleeve and a cartridge made therefrom
WO2010009723A1 (en) * 2008-07-25 2010-01-28 Rheinmetall Waffe Munition Gmbh Cartridge ammunition

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6164209A (en) * 1998-12-21 2000-12-26 Olin Corporation Shotshell basewad
FR2926133B1 (en) * 2008-01-09 2010-01-22 France Cheddite METHOD FOR MANUFACTURING CYLINDERS FOR CARTRIDGE SLEEVES AND COMPOSITION.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR454548A (en) * 1912-01-26 1913-07-07 Wiesbadener Staniol-Und Metallkapsel-Fabrik A Flac Aluminum cartridge case
FR1430385A (en) * 1965-01-22 1966-03-04 Gevelot Sa Process for manufacturing cartridges, and cartridges obtained by this process
BE704039A (en) * 1966-09-21 1968-02-01
FR1553453A (en) * 1967-02-27 1969-01-10
FR2011986A1 (en) * 1968-06-26 1970-03-13 Olin Mathieson
US3675576A (en) * 1970-02-18 1972-07-11 Colorado Business Dev Corp Reloadable two-piece shotgun cartridge

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1152193A (en) * 1965-07-23 1969-05-14 Fiocchi Spa Giulio Sporting Cartridge Case
US4867066A (en) * 1988-10-21 1989-09-19 Olin Corporation Shotshell casing with reduced volume basewad and increased interior volume for larger shot loads

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR454548A (en) * 1912-01-26 1913-07-07 Wiesbadener Staniol-Und Metallkapsel-Fabrik A Flac Aluminum cartridge case
FR1430385A (en) * 1965-01-22 1966-03-04 Gevelot Sa Process for manufacturing cartridges, and cartridges obtained by this process
BE704039A (en) * 1966-09-21 1968-02-01
FR1553453A (en) * 1967-02-27 1969-01-10
FR2011986A1 (en) * 1968-06-26 1970-03-13 Olin Mathieson
US3675576A (en) * 1970-02-18 1972-07-11 Colorado Business Dev Corp Reloadable two-piece shotgun cartridge

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5710391A (en) * 1993-10-12 1998-01-20 Chetcuti; Francis Recoil reducer wad for ammunition
WO1998048238A1 (en) * 1997-04-21 1998-10-29 Tomscot Hb Shotgun cartridge case-sleeve and a cartridge made therefrom
US6305291B1 (en) 1997-04-21 2001-10-23 Tomscot Hb Shotgun cartridge case-sleeve and a cartridge made therefrom
WO2010009723A1 (en) * 2008-07-25 2010-01-28 Rheinmetall Waffe Munition Gmbh Cartridge ammunition
US8418621B2 (en) 2008-07-25 2013-04-16 Rheinmetall Waffe Munition Gmbh Cartridge ammunition

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AU635990B2 (en) 1993-04-08
DE69005432T2 (en) 1994-04-14
IT8903784A0 (en) 1989-12-22
CA2013981C (en) 1999-08-24
ES2047306T3 (en) 1994-02-16
CN1023512C (en) 1994-01-12
DE69005432D1 (en) 1994-02-03
ATE99044T1 (en) 1994-01-15
RU2069302C1 (en) 1996-11-20
YU241390A (en) 1994-11-15
CN1054131A (en) 1991-08-28
EP0435830B1 (en) 1993-12-22
BR9006561A (en) 1991-10-01
CA2013981A1 (en) 1991-06-22
AU6825690A (en) 1991-06-27
IT1235986B (en) 1992-12-15

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