EP0580486B1 - Rimfire primer and process for the manufacture thereof - Google Patents
Rimfire primer and process for the manufacture thereof Download PDFInfo
- Publication number
- EP0580486B1 EP0580486B1 EP93401852A EP93401852A EP0580486B1 EP 0580486 B1 EP0580486 B1 EP 0580486B1 EP 93401852 A EP93401852 A EP 93401852A EP 93401852 A EP93401852 A EP 93401852A EP 0580486 B1 EP0580486 B1 EP 0580486B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- priming charge
- annular percussion
- salt
- tetrazene
- pulverulent
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 5
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 239000000203 mixture Substances 0.000 claims description 49
- 238000009527 percussion Methods 0.000 claims description 24
- 239000000843 powder Substances 0.000 claims description 17
- 230000037452 priming Effects 0.000 claims description 16
- 150000004655 tetrazenes Chemical class 0.000 claims description 16
- 239000002360 explosive Substances 0.000 claims description 15
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 11
- 229910021346 calcium silicide Inorganic materials 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 239000007800 oxidant agent Substances 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 7
- 239000011591 potassium Substances 0.000 claims description 7
- 229910052700 potassium Inorganic materials 0.000 claims description 7
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 6
- 229960004643 cupric oxide Drugs 0.000 claims description 5
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims description 4
- 229920000084 Gum arabic Polymers 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 241000978776 Senegalia senegal Species 0.000 claims description 4
- 235000010489 acacia gum Nutrition 0.000 claims description 4
- 239000000205 acacia gum Substances 0.000 claims description 4
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 4
- 231100000331 toxic Toxicity 0.000 claims description 3
- 230000002588 toxic effect Effects 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 235000010323 ascorbic acid Nutrition 0.000 claims description 2
- 229960005070 ascorbic acid Drugs 0.000 claims description 2
- 239000011668 ascorbic acid Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 150000001451 organic peroxides Chemical class 0.000 claims description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 2
- 235000010333 potassium nitrate Nutrition 0.000 claims description 2
- 239000004323 potassium nitrate Substances 0.000 claims description 2
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 claims description 2
- 229960001860 salicylate Drugs 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- ZVLHRIAZZXQKAV-UHFFFAOYSA-N 4,5-dinitro-1-oxido-2,1,3-benzoxadiazol-1-ium Chemical class [O-][N+](=O)C1=C([N+](=O)[O-])C=CC2=[N+]([O-])ON=C21 ZVLHRIAZZXQKAV-UHFFFAOYSA-N 0.000 claims 8
- -1 alkaline-earth metal salt Chemical class 0.000 claims 1
- 239000004411 aluminium Substances 0.000 claims 1
- 150000003839 salts Chemical class 0.000 description 13
- IUKSYUOJRHDWRR-UHFFFAOYSA-N 2-diazonio-4,6-dinitrophenolate Chemical compound [O-]C1=C([N+]#N)C=C([N+]([O-])=O)C=C1[N+]([O-])=O IUKSYUOJRHDWRR-UHFFFAOYSA-N 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000000977 initiatory effect Effects 0.000 description 4
- 230000035939 shock Effects 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 2
- 239000003380 propellant Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C7/00—Non-electric detonators; Blasting caps; Primers
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B33/00—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
- C06B33/08—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide with a nitrated organic compound
- C06B33/10—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide with a nitrated organic compound the compound being an aromatic
Definitions
- the present invention relates to new priming charges with annular percussion, as well as their manufacturing process.
- percussion priming charges intended to ensure the ignition of propellant powders in the firing and sealing cartridges and generally in all devices producing a flame from the action of a striker, exhibit the most of the time the disadvantage of containing toxic compounds.
- the dinitrobenzofuroxane salt cannot be used in any proportion or even in combination with any other explosive.
- Long research finally made it possible to highlight which were the essential characteristics necessary for the constitution of a composition of starting charge which, on the one hand do not give place to any emission of toxic residues released into the atmosphere during the shooting cartridges, and on the other hand are endowed with a sufficient sensitivity to percussion but without excess, giving them a satisfactory operation.
- the dinitrobenzofuroxane salt is preferably constituted by a salt of an alkali or alkaline earth metal, in particular its potassium salt.
- the initiation composition with annular percussion according to the present invention must imperatively comprise, as explosives, a mixture of a salt of dinitrobenzofuroxane and of tetrazene.
- concentrations of dinitrobenzofuroxane salt and tetrazene may however vary in practice in greater or lesser proportions which will depend on the mechanical environment of the filler, that is to say on the nature and the form. exact of the case used for the cartridge, as well as the nature of the powder used in this cartridge.
- an explosive mixture containing a preponderant proportion of dinitrobenzofuroxane salt will be used. Most of the time, the dinitrobenzofuroxane salt will be involved in the composition so as to reach 40 to 70% of the total weight of the latter and the tetrazene so as to reach 5 to 15% by weight relative to the total weight of the composition.
- the pulverulent oxidizing agent consists of cupric oxide, potassium nitrate, ferric oxide, a metal salicylate, ascorbic acid, a mineral or organic peroxide, as well than mixtures of these oxidants.
- the pulverulent reducing agent will be chosen from calcium silicide, aluminum, iron, zinc, magnesium, as well as their mixtures, and in particular mixtures based on silicon silicide. calcium.
- the inert abrasive powder consists of glass powder.
- the calcium silicide used in the composition according to the invention will simultaneously fulfill the role of pulverulent reducing agent and inert abrasive powder.
- the relative proportions of all the constituents will also be defined by a person skilled in the art calling upon his general knowledge in the matter, and in particular so as to obtain a composition suitable for good implementation, for example at the level volumetric dosing in cases with annular percussion.
- a composition suitable for good implementation for example at the level volumetric dosing in cases with annular percussion.
- a binder solution is also incorporated into the mixture, for example an aqueous solution of gum arabic.
- Example The non-explosive ingredients of the composition according to the invention are weighed, namely cupric oxide, glass powder and calcium silicide, which are introduced into a rotary mixer where they are stirred so as to make the homogeneous mixture. This mixture is then transferred to a planetary mixer intended to receive wet compositions, into which the necessary quantity of water is added, then the potassium dinitrobenzofuroxane and the previously weighed tetrazene are poured onto this mixture.
- an aqueous solution of gum arabic is added which acts as a binder.
- the various pulverulent constituents are generally used with a small average particle size, preferably less than about 250 ⁇ m.
- a ready-to-use composition corresponding to the following formulation: - potassium dinitrobenzofuroxane 55% - tetrazene 11% - cupric oxide 11% - glass powder 11% - calcium silicide 11% - binder: gum arabic 1%
- compositions are then distributed by spreading in cases for 6.8 mm annular percussion and distributed by compression or turbination or any other mechanical means, for example using a device identical to that described in the application for French patent n ° 91 02011 relating to initiation by oblique compression.
- an adequate mass of propellant powder is poured into each case, which is optionally packed, then pleating and then varnishing of the cartridges.
- a projectile such as a bullet is placed and crimped onto the primed case.
- Example K shows that the use of the potassium salt of dinitrobenzofuroxane as the only explosive leads to very poor results for cases with annular percussion.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Air Bags (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
La présente invention concerne de nouvelles charges d'amorçage à percussion annulaire, ainsi que leur procédé de fabrication.The present invention relates to new priming charges with annular percussion, as well as their manufacturing process.
On sait que les charges d'amorçage à percussion, destinées à assurer l'allumage des poudres propulsives dans les cartouches de tir et de scellement et généralement dans tous les dispositifs produisant une flamme à partir de l'action d'un percuteur, présentent la plupart du temps l'inconvénient de renfermer des composés toxiques.It is known that percussion priming charges, intended to ensure the ignition of propellant powders in the firing and sealing cartridges and generally in all devices producing a flame from the action of a striker, exhibit the most of the time the disadvantage of containing toxic compounds.
Une première solution permettant de résoudre ce problème de toxicité a été apportée par la Demanderesse et se trouve exposée dans la demande de brevet européen EP-A-0 334 725. Il s'agit essentiellement d'une charge exempte de métal toxique, dont l'explosif primaire sensible au choc est à base de diazodinitrophénol.A first solution enabling this toxicity problem to be solved was provided by the Applicant and is described in European patent application EP-A-0 334 725. It is essentially a charge free of toxic metal, of which l primary explosive sensitive to shock is based on diazodinitrophenol.
Il s'est avéré que de telles compositions donnaient parfaitement satisfaction lorsqu'elles étaient utilisées pour des charges d'amorçage à percussion centrale; en revanche elles ne procuraient pas de sensibilité suffisante dans le cas d'un amorçage annulaire.It turned out that such compositions were entirely satisfactory when used for priming charges with central percussion; on the other hand, they did not provide sufficient sensitivity in the case of an annular priming.
Une explication de cette différence de comportement peut être trouvée dans le fait que la composition explosive est plus fortement comprimée dans le cadre des amorces à percussion centrale, alors qu'elle n'est que légèrement tassée dans le bourrelet annulaire des douilles de cartouches à percussion annulaire.An explanation for this difference in behavior can be found in the fact that the explosive composition is more strongly compressed in the context of primers with central percussion, while it is only slightly packed in the annular bead of the cartridge cartridge cases annular.
On pouvait donc penser que, si les questions de toxicité pouvaient être résolues, en revanche il n'en était pas de même des problèmes liés à une sensibilité insuffisante, vraisemblablement due à un manque de compacité des charges dans les dispositions à percussion annulaire.One could therefore think that, if the questions of toxicity could be resolved, on the other hand it was not the same for the problems linked to an insufficient sensitivity, probably due to a lack of compactness of the charges in the arrangements with annular percussion.
De façon tout à fait imprévisible, il s'est avéré que ce problème pouvait être résolu en faisant appel à un mélange d'un sel de dinitrobenzofuroxanne et de tétrazène, en tant qu'explosif sensible au choc, alors que dans l'état de la technique l'utilisation de dinitrobenzofuroxanne ou d'un de ses sels n'était généralement envisagée que dans les dispositifs d'amorçage électrique ou éventuellement sous l'angle d'un explosif d'appoint sensible au choc, mais alors nécessairement en présence d'un autre explosif majeur, en particulier le diazodinitrophénol.Quite unpredictably, it turned out that this problem could be solved by using a mixture of a salt of dinitrobenzofuroxane and tetrazene, as an explosive sensitive to shock, while in the state of the technique the use of dinitrobenzofuroxanne or one of its salts was generally envisaged only in the devices of electric initiation or possibly under the angle of an explosive of supplement sensitive to the shock, but then necessarily in the presence of another major explosive, especially diazodinitrophenol.
Bien entendu, le sel de dinitrobenzofuroxanne ne peut pas être utilisé dans des proportions quelconques ou encore en association avec n'importe quel autre explosif. De longues recherches ont finalement permis de mettre en évidence quelles étaient les caractéristiques essentielles nécessaires à la constitution d'une composition de charge d'amorçage qui, d'une part ne donnent lieu à aucune émission de résidus toxiques libérés dans l'atmosphère lors du tir des cartouches, et d'autre part sont dotées d'une sensibilité à la percussion suffisante mais sans excès, leur conférant un fonctionnement satisfaisant.Of course, the dinitrobenzofuroxane salt cannot be used in any proportion or even in combination with any other explosive. Long research finally made it possible to highlight which were the essential characteristics necessary for the constitution of a composition of starting charge which, on the one hand do not give place to any emission of toxic residues released into the atmosphere during the shooting cartridges, and on the other hand are endowed with a sufficient sensitivity to percussion but without excess, giving them a satisfactory operation.
Une telle composition de charge d'amorçage à percussion annulaire conforme à la présente invention contient, exprimée en poids:
- 40 à 90% d'un mélange explosif d'un sel de dinitrobenzofuroxanne et de tétrazène,
- 5 à 30% d'un agent oxydant pulvérulent,
- 5 à 25% d'un agent réducteur pulvérulent,
- 0 à 25% d'une poudre abrasive inerte, et
- 0 à 5% d'un liant.
- 40 to 90% of an explosive mixture of a salt of dinitrobenzofuroxane and tetrazene,
- 5 to 30% of a powdery oxidizing agent,
- 5 to 25% of a pulverulent reducing agent,
- 0 to 25% of an inert abrasive powder, and
- 0 to 5% of a binder.
Selon une autre caractéristique de la présente invention, le sel de dinitrobenzofuroxanne est de préférence constitué par un sel d'un métal alcalin ou alcalino-terreux, en particulier son sel de potassium.According to another characteristic of the present invention, the dinitrobenzofuroxane salt is preferably constituted by a salt of an alkali or alkaline earth metal, in particular its potassium salt.
Il est clair que la composition d'amorçage à percussion annulaire selon la présente invention doit impérativement comprendre à titre d'explosifs un mélange d'un sel de dinitrobenzofuroxanne et de tétrazène. Les concentrations relatives exactes de sel de dinitrobenzofuroxanne et de tétrazène pourront cependant varier dans la pratique dans des proportions plus ou moins grandes qui seront fonction de l'environnement mécanique de la charge, c'est-à-dire de la nature et de la forme exactes de l'étui utilisé pour la cartouche, ainsi que de la nature de la poudre utilisée dans cette cartouche.It is clear that the initiation composition with annular percussion according to the present invention must imperatively comprise, as explosives, a mixture of a salt of dinitrobenzofuroxane and of tetrazene. The exact relative concentrations of dinitrobenzofuroxane salt and tetrazene may however vary in practice in greater or lesser proportions which will depend on the mechanical environment of the filler, that is to say on the nature and the form. exact of the case used for the cartridge, as well as the nature of the powder used in this cartridge.
De façon générale, on aura recours à un mélange explosif contenant une proportion prépondérante de sel de dinitrobenzofuroxanne. La plupart du temps, le sel de dinitrobenzofuroxanne interviendra dans la composition de manière à atteindre 40 à 70% du poids total de cette dernière et le tétrazène de manière à atteindre 5 à 15% en poids par rapport au poids total de la composition.Generally, an explosive mixture containing a preponderant proportion of dinitrobenzofuroxane salt will be used. Most of the time, the dinitrobenzofuroxane salt will be involved in the composition so as to reach 40 to 70% of the total weight of the latter and the tetrazene so as to reach 5 to 15% by weight relative to the total weight of the composition.
Selon une autre caractéristique de la présente invention, l'agent oxydant pulvérulent est constitué par de l'oxyde cuivrique, du nitrate de potassium, de l'oxyde ferrique, un salicylate métallique, l'acide ascorbique, un peroxyde minéral ou organique, ainsi que les mélanges de ces oxydants.According to another characteristic of the present invention, the pulverulent oxidizing agent consists of cupric oxide, potassium nitrate, ferric oxide, a metal salicylate, ascorbic acid, a mineral or organic peroxide, as well than mixtures of these oxidants.
Selon une autre caractéristique de la présente invention, l'agent réducteur pulvérulent sera choisi parmi le siliciure de calcium, l'aluminium, le fer, le zinc, le magnésium, ainsi que leurs mélanges, et en particulier les mélanges à base de siliciure de calcium.According to another characteristic of the present invention, the pulverulent reducing agent will be chosen from calcium silicide, aluminum, iron, zinc, magnesium, as well as their mixtures, and in particular mixtures based on silicon silicide. calcium.
Enfin, selon une autre caractéristique de la présente invention, la poudre abrasive inerte est constituée par de la poudre de verre.Finally, according to another characteristic of the present invention, the inert abrasive powder consists of glass powder.
Selon une caractéristique particulière de la présente invention, le siliciure de calcium utilisé dans la composition selon l'invention remplira simultanément le rôle d'agent réducteur pulvérulent et de poudre abrasive inerte.According to a particular characteristic of the present invention, the calcium silicide used in the composition according to the invention will simultaneously fulfill the role of pulverulent reducing agent and inert abrasive powder.
De façon générale, les proportions relatives de tous les constituants seront également définis par l'homme du métier faisant appel à ses connaissances générales en la matière, et notamment de manière à obtenir une composition apte à une bonne mise en oeuvre, par exemple au niveau du dosage volumétrique dans les étuis à percussion annulaire. Dans la pratique, il s'est avéré que l'on obtenait d'excellents résultats en faisant appel à un mélange de poudre de verre et de siliciure de calcium, par exemple à des mélanges équipondéraux.In general, the relative proportions of all the constituents will also be defined by a person skilled in the art calling upon his general knowledge in the matter, and in particular so as to obtain a composition suitable for good implementation, for example at the level volumetric dosing in cases with annular percussion. In practice, it has been found that excellent results are obtained by using a mixture of glass powder and calcium silicide, for example equiponderal mixtures.
L'invention concerne enfin un procédé de fabrication d'une charge d'amorçage à percussion annulaire consistant à réaliser les étapes successives suivantes :
- on mélange à sec l'agent oxydant pulvérulent ainsi que l'agent réducteur pulvérulent et la poudre abrasive inerte;
- on ajoute ensuite à ce mélange ainsi constitué, le sel de dinitrobenzofuroxanne et le tétrazène, puis
- on homogénéise le mélange ainsi obtenu.
- the pulverulent oxidizing agent as well as the pulverulent reducing agent and the inert abrasive powder are dry mixed;
- then added to this mixture thus constituted, the dinitrobenzofuroxane salt and the tetrazene, then
- the mixture thus obtained is homogenized.
Au cours de la seconde opération consistant à ajouter le sel de dinitrobenzofuroxanne et le tétrazène, le cas échéant, on incorpore également au mélange une solution de liant, par exemple une solution aqueuse de gomme arabique.During the second operation consisting in adding the dinitrobenzofuroxane salt and the tetrazene, if necessary, a binder solution is also incorporated into the mixture, for example an aqueous solution of gum arabic.
L'objet de la présente invention sera décrit ci-après plus en détail en se référant à l'exemple de réalisation particulier donné ci-après à titre d'illustration et au tableau de comparaison de la page 6.
Exemple : On pèse les ingrédients non explosifs de la composition selon l'invention, à savoir l'oxyde cuivrique, la poudre de verre et le siliciure de calcium, que l'on introduit dans un mélangeur rotatif où ils sont brassés de manière à rendre le mélange homogène. Ce mélange est ensuite transvasé dans un malaxeur planétaire destiné à recevoir des compositions humides, dans lequel on ajoute la quantité d'eau nécessaire, puis on verse sur ce mélange le dinitrobenzofuroxanne de potassium et le tétrazène préalablement pesé.The object of the present invention will be described below in more detail with reference to the particular embodiment given below by way of illustration and to the comparison table on page 6.
Example : The non-explosive ingredients of the composition according to the invention are weighed, namely cupric oxide, glass powder and calcium silicide, which are introduced into a rotary mixer where they are stirred so as to make the homogeneous mixture. This mixture is then transferred to a planetary mixer intended to receive wet compositions, into which the necessary quantity of water is added, then the potassium dinitrobenzofuroxane and the previously weighed tetrazene are poured onto this mixture.
En fin d'opération d'homogénéisation, on ajoute une solution aqueuse de gomme arabique jouant le rôle de liant.At the end of the homogenization operation, an aqueous solution of gum arabic is added which acts as a binder.
On observera que les différents constituants pulvérulents sont généralement utilisés avec une faible granulométrie moyenne, de préférence inférieure à environ 250 µm.It will be observed that the various pulverulent constituents are generally used with a small average particle size, preferably less than about 250 μm.
Après un temps de malaxage suffisant, on obtient une composition prête à l'emploi répondant à la formulation suivante :
Une telle composition est ensuite distribuée par tartinage dans des étuis pour percussion annulaire de calibre 6,8 mm et répartis par compression ou turbinage ou tout autre moyen mécanique, par exemple à l'aide d'un dispositif identique à celui décrit dans la demande de brevet français n° 91 02011 relatif à un amorçage par compression oblique.Such a composition is then distributed by spreading in cases for 6.8 mm annular percussion and distributed by compression or turbination or any other mechanical means, for example using a device identical to that described in the application for French patent n ° 91 02011 relating to initiation by oblique compression.
A l'aide d'un procédé de dosage approprié, par exemple volumétrique tel qu'une trémie, on verse dans chaque étui une masse adéquate de poudre propulsive que l'on tasse éventuellement, on effectue alors le plissage puis le vernissage des cartouches. Dans un exemple de réalisation conforme à l'invention, autre que celui des charges de scellement ci-dessus, on place et on sertit sur l'étui amorcé un projectile tel qu'une balle.Using an appropriate metering method, for example volumetric such as a hopper, an adequate mass of propellant powder is poured into each case, which is optionally packed, then pleating and then varnishing of the cartridges. In an exemplary embodiment according to the invention, other than that of the above sealing charges, a projectile such as a bullet is placed and crimped onto the primed case.
Les cartouches obtenues sont ensuite testées pour leur sensibilité à la percussion sur un montage de tir correspondant aux caractéristiques suivantes :
- percuteur à pointe arrondie, diamètre 2 mm,
- billes de 112 g,
- hauteur de chute 300 mm,
- striker with rounded tip, diameter 2 mm,
- 112 g beads,
- fall height 300 mm,
L'ensemble des résultats correspondant à l'exemple de la composition précédemment indiqué et à un certain nombre d'autres combinaisons possibles d'explosifs de la technique antérieure ont été consignés dans le tableau ci-après. Ces résultats démontrent de façon manifeste que le problème de la sensibilité des charges d'amorçage à percussion annulaire n'a pu être résolu de façon satisfaisante qu'en ayant recours au mélange d'explosif constitué par le sel de dinitrobenzofuroxanne potassium associé au tétrazène.The set of results corresponding to the example of the composition indicated above and to a certain number of other possible combinations of explosives of the prior art have been recorded in the table below. These results clearly demonstrate that the problem of the sensitivity of the initiation charges to annular percussion could only be satisfactorily resolved by using the explosive mixture constituted by the salt of dinitrobenzofuroxane potassium associated with tetrazene.
Il apparaît également que le mélange de diazodinitrophénol associé au tétrazène donne de très mauvais résultats, et que le mélange de diazodinitrophénol et de dinitrobenzofuroxanne de potassium donne de mauvais résultats.It also appears that the mixture of diazodinitrophenol associated with tetrazene gives very poor results, and that the mixture of diazodinitrophenol and potassium dinitrobenzofuroxane gives poor results.
Enfin, l'exemple K montre que l'utilisation à titre d'explosif du seul sel de potassium de dinitrobenzofuroxanne conduit à de très mauvais résultats pour des étuis à percussion annulaire.
KDNBF : dinitrobenzofuroxanne de potassium
Liant : non pris en compte dans la composition centésimale
KDNBF: potassium dinitrobenzofuroxane
Binder: not taken into account in the percentage composition
Claims (11)
- Priming charge with annular percussion, free from any toxic metal, characterized in that it corresponds to the following weight composition:- 40 to 90 % of an explosive mixture of a dinitrobenzofuroxan salt and of tetrazene,- 5 to 30 % of a pulverulent oxidizing agent,- 5 to 25 % of a pulverulent reducing agent,- 0 to 25 % of an inert abrasive powder, and- 0 to 5 % of a binder.
- Priming charge with annular percussion according to Claim 1, characterized in that the dinitrobenzofuroxan salt is an alkali or alkaline-earth metal salt, in particular potassium dinitrobenzofuroxan.
- Priming charge with annular percussion according to either of Claims 1 and 2, characterized in that the explosive mixture contains a preponderant proportion of dinitrobenzofuroxan salt.
- Priming charge with annular percussion according to Claim 3, characterized in that the dinitrobenzofuroxan salt represents from 40 to 70 % by weight of the total composition and the tetrazene 5 to 15 % by weight of the total composition.
- Priming charge with annular percussion according to one of Claims 1 to 4, characterized in that the pulverulent oxidizing agent is chosen from cupric oxide, potassium nitrate, ferric oxide, a metal salicylate, ascorbic acid, an inorganic or organic peroxide and mixtures of these oxidants.
- Priming charge with annular percussion according to one of Claims 1 to 5, characterized in that the pulverulent reducing agent is chosen from calcium silicide, aluminium, iron, zinc, magnesium and mixtures thereof, and in particular mixtures based on calcium silicide.
- Priming charge with annular percussion according to one of Claims 1 to 6, characterized in that the inert abrasive powder consists of glass powder.
- Priming charge with annular percussion according to one of Claims 1 to 7, characterized in that the calcium silicide acts at the same time as pulverulent reducing agent and as abrasive powder.
- Priming charge with annular percussion according to one of Claims 1 to 8, characterized in that it corresponds to the following weight composition:- 40 to 70 % of potassium dinitrobenzofuroxan,- 5 to 15 % of tetrazene- 5 to 30 % of cupric oxide,- 5 to 25 % of calcium silicide,- 5 to 25 % of glass powder, and- 0 to 5 % of binder.
- Process for the manufacture of a priming charge with annular percussion according to one of Claims 1 to 9, characterized in that the following successive stages are carried out:- the pulverulent oxidizing agent and the pulverulent reducing agent and the inert abrasive powder are mixed dry;- the dinitrobenzofuroxan salt and the tetrazene are then added to this mixture thus formed, then- the mixture thus obtained is homogenized.
- Process according to Claim 10, characterized in that during the last operation consisting in adding the dinitrobenzofuroxan salt and the tetrazene, a solution of binder, for example an agueous solution of gum arabic, is also incorporated into the mixture.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9208945A FR2693721B1 (en) | 1992-07-20 | 1992-07-20 | Priming charge with annular percussion and its manufacturing process. |
| FR9208945 | 1992-07-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0580486A1 EP0580486A1 (en) | 1994-01-26 |
| EP0580486B1 true EP0580486B1 (en) | 1996-06-26 |
Family
ID=9432068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93401852A Expired - Lifetime EP0580486B1 (en) | 1992-07-20 | 1993-07-19 | Rimfire primer and process for the manufacture thereof |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5353707A (en) |
| EP (1) | EP0580486B1 (en) |
| DE (1) | DE69303334T2 (en) |
| FR (1) | FR2693721B1 (en) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5417160A (en) * | 1993-12-01 | 1995-05-23 | Olin Corporation | Lead-free priming mixture for percussion primer |
| IT1266171B1 (en) * | 1994-07-15 | 1996-12-23 | Europa Metalli Sezione Difesa | PRIMING MIX WITHOUT TOXIC MATERIALS AND PERCUSSION PRIMING FOR CARTRIDGES USING THIS MIX. |
| FR2722876B1 (en) * | 1994-07-22 | 1996-09-13 | Manurhin Defense | EXPLOSIVE PROJECTILE |
| DE69508023T2 (en) * | 1994-08-27 | 1999-10-07 | Eley Ltd | Initial charge |
| US5616881A (en) * | 1995-05-30 | 1997-04-01 | Morton International, Inc. | Inflator socket pin collar for integrated circuit initaitor with integral metal oxide varistor for electro-static discharge protections |
| US5684268A (en) * | 1995-09-29 | 1997-11-04 | Remington Arms Company, Inc. | Lead-free primer mix |
| DE19540278A1 (en) * | 1995-10-28 | 1997-04-30 | Dynamit Nobel Ag | Lead- and barium-free igniters |
| US5672841A (en) * | 1995-12-15 | 1997-09-30 | Morton International, Inc. | Inflator initiator with zener diode electrostatic discharge protection |
| US5932832A (en) * | 1996-04-15 | 1999-08-03 | Autoliv Asp, Inc. | High pressure resistant initiator with integral metal oxide varistor for electro-static discharge protection |
| US6305286B1 (en) * | 1997-03-12 | 2001-10-23 | Trw Inc. | Preparation of an igniter with an ultraviolet cured ignition droplet |
| GB2329380B (en) * | 1997-09-13 | 1999-08-18 | Royal Ordnance Plc | Priming composition |
| US5993577A (en) * | 1998-09-04 | 1999-11-30 | Federal Cartridge Company | Lead-free, heavy-metal-free rim-fire priming composition dedicated for Ralph B. Lynn |
| FR2809806B1 (en) * | 2000-05-30 | 2003-01-10 | Livbag Snc | ELECTRO-PYROTECHNIC INITIATOR WITH A THIN FILM BRIDGE AND A VERY LOW OPERATING ENERGY |
| US6544363B1 (en) | 2000-10-30 | 2003-04-08 | Federal Cartridge Company | Non-toxic, heavy-metal-free shotshell primer mix |
| US20040002604A1 (en) * | 2001-12-10 | 2004-01-01 | Richard Apodaca | Phenylalkynes |
| US6663731B1 (en) | 2002-03-12 | 2003-12-16 | The United States Of America As Represented By The Secretary Of The Navy | Lead-free pyrotechnic composition |
| US20040154713A1 (en) * | 2003-01-23 | 2004-08-12 | Olin Corporation | Lead-free nontoxic priming mix |
| DE102006024511A1 (en) * | 2006-05-23 | 2007-11-29 | Ruag Ammotec Gmbh | ignition |
| JP5805382B2 (en) * | 2009-11-16 | 2015-11-04 | 日本工機株式会社 | Detonator composition for detonator |
| DE102015014428A1 (en) * | 2014-11-10 | 2016-05-12 | Ruag Ammotec Gmbh | Thermal pre-ignition agents |
| US9800580B2 (en) * | 2015-11-16 | 2017-10-24 | Mastercard International Incorporated | Systems and methods for authenticating an online user using a secure authorization server |
| US10352671B1 (en) | 2017-04-07 | 2019-07-16 | The United States Of America As Represented By The Secretary Of The Army | Automated primer manufacturing machine and process |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3135636A (en) * | 1962-01-02 | 1964-06-02 | Atlas Chem Ind | Ignition composition containing an alkali metal salt of dinitrobenzfuroxan and a lacqer binder |
| US3321343A (en) * | 1966-03-28 | 1967-05-23 | Olin Mathieson | Priming composition containing carbon which exhibits conchoidal fracture |
| US3423259A (en) * | 1966-03-28 | 1969-01-21 | Olin Mathieson | Ammunition priming composition of dry particulate ingredients with karaya gum binder |
| US4142927A (en) * | 1975-09-04 | 1979-03-06 | Walker Franklin E | Free radical explosive composition |
| US4406210A (en) * | 1981-02-17 | 1983-09-27 | Brunswick Corporation | Jet-propelled missile with single propellant-explosive |
| US5039812A (en) * | 1981-04-13 | 1991-08-13 | The United States Of America As Represented By The Secretary Of The Navy | Insensitive high density explosive |
| US4503229A (en) * | 1983-06-24 | 1985-03-05 | United States Of America As Represented By The Secretary Of The Navy | 1,4,5,8-Tetranitro-1,4,5,8-tetraazadifurazano-[3,4-c][3,4-h]decalin |
| US4689185A (en) * | 1986-07-25 | 1987-08-25 | Olin Corporation | Priming method for rimfire cartridge |
| FR2628735B1 (en) * | 1988-03-15 | 1990-08-24 | Ncs Pyrotechnie Technologies | PERCUSSION PRIMER LOADS AND THEIR MANUFACTURING METHOD |
| US4963201A (en) * | 1990-01-10 | 1990-10-16 | Blount, Inc. | Primer composition |
| US5088412A (en) * | 1990-07-16 | 1992-02-18 | Networks Electronic Corp. | Electrically-initiated time-delay gas generator cartridge for missiles |
-
1992
- 1992-07-20 FR FR9208945A patent/FR2693721B1/en not_active Expired - Lifetime
-
1993
- 1993-07-19 DE DE69303334T patent/DE69303334T2/en not_active Expired - Lifetime
- 1993-07-19 US US08/093,820 patent/US5353707A/en not_active Expired - Lifetime
- 1993-07-19 EP EP93401852A patent/EP0580486B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR2693721A1 (en) | 1994-01-21 |
| DE69303334D1 (en) | 1996-08-01 |
| US5353707A (en) | 1994-10-11 |
| EP0580486A1 (en) | 1994-01-26 |
| DE69303334T2 (en) | 1996-11-28 |
| FR2693721B1 (en) | 1994-10-21 |
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