EP1059505B1 - Douille métallique de munition pour armes à feu interieurement revêtue d'un manchon anti-érosif - Google Patents
Douille métallique de munition pour armes à feu interieurement revêtue d'un manchon anti-érosif Download PDFInfo
- Publication number
- EP1059505B1 EP1059505B1 EP00401523A EP00401523A EP1059505B1 EP 1059505 B1 EP1059505 B1 EP 1059505B1 EP 00401523 A EP00401523 A EP 00401523A EP 00401523 A EP00401523 A EP 00401523A EP 1059505 B1 EP1059505 B1 EP 1059505B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cartridge case
- sleeve
- combustible
- titanium oxide
- nitrocellulose
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
- F42B5/02—Cartridges, i.e. cases with charge and missile
- F42B5/24—Cartridges, i.e. cases with charge and missile for cleaning; for cooling; for lubricating ; for wear reducing
Definitions
- the present invention provides such a solution and primarily relates to a new socket metallic ammunition for firearms comprising a metal bottom and skirt, at least partially internally coated with a new anti-erosion additive comprising titanium oxide as an anti-erosion agent.
- This new socket is characterized in that the new anti-erosion add-on is a rigid sleeve made up of a combustible matrix loaded with powdery titanium oxide, in that the weight content of TiO 2 is between 10% and 30% relative to the total weight of the sleeve, limits included, and in that the combustible matrix comprises fibrous nitrocellulose, fibrous cellulose and an organic resin.
- the sleeve has a longitudinal slot or helical over its entire length so as to offer a certain radial elasticity facilitating its implementation place by the collar of the socket, as well as its positioning and holding it against the surface inside of the sleeve skirt.
- the combustible matrix is essentially consisting of fibrous nitrocellulose, of fibrous cellulose and organic resin, say that the sum of the weight contents in nitrocellulose, cellulose and resin is more than 95% with respect to the fuel matrix.
- fibrous nitrocellulose it is possible to use any industrial nitrocellulose with a nitrogen level less than 13.8%.
- the apparent density measured is 0.85 g / cm 3 .
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Paints Or Removers (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Manufacturing Of Micro-Capsules (AREA)
- Materials For Medical Uses (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
Cette solution présente plusieurs inconvénients. Tout d'abord, la cinétique de départ des charges, dépendante de la température de ramollissement de la cire et de la tenue du tissu, est mal maítrisée.
Elle présente aussi l'inconvénient d'un risque de pollution de l'allumeur et de la poudre propulsive par dépôt de particules d'oxydes métalliques arrachées de leur support. En cas de sollicitations mécaniques sévères de la munition, une telle pollution peut conduire à l'inhibage des grains de poudre propulsive, puis par suite provoquer un mauvais allumage (retard), puis même l'éclatement du tube de l'arme. De plus, l'efficacité anti-érosive est assez limitée par rapport au niveau recherché par les utilisateurs actuels, et on observe la présence de résidus dans le tube de l'arme, ce qui provoque son encrassement.
De plus , on a constaté une excellente retenue de la charge TiO2 par le matériau fibreux durant toutes les phases de la vie de la munition, et il n'est pas nécessaire d'interposer une protection entre le manchon anti-érosif et le chargement propulsif pour éviter la pollution du chargement. Cela représente un avantage considérable concernant le compromis précité sécurité de fonctionnement des munitions/efficacité de l'action anti-érosive.
Par ailleurs, on a également noté l'absence de phénomène d'encrassement du tube de l'arme, et même de la douille, pendant le coup de feu.
Par « revêtue », il faut comprendre que le manchon est en contact total ou partiel avec l'intérieur de la jupe. Le contact partiel peut être ponctuel, linéaire ou surfacique. De façon générale, en cas de contact partiel, celui-ci est matérialisé par plusieurs zones de contact ponctuelles et/ou linéaires et/ou surfaciques.
Le manchon peut aussi être constitué par un empilage de plusieurs tronçons.
Une telle configuration crée, entre la paroi intérieure de la jupe et le manchon, des conduits longitudinaux qui favorisent la combustion de la matrice combustible du manchon ainsi que l'écoulement de tous les gaz de combustion du chargement propulsif et du manchon.
La matrice combustible peut également comprendre certains additifs, tels que des stabilisants comme la diphénylamine.
Temps de combustion | |
caractéristique (0,5 à 0,9 P max) | 3,6 ms |
Durée totale de combustion (3 MPa à P max) | 51 ms |
Claims (9)
- Douille métallique de munition pour armes à feu au moins partiellement intérieurement revêtue d'un appoint anti-érosif comprenant de l'oxyde de titane pulvérulent, caractérisée en ce que l'appoint anti-érosif est un manchon rigide constitué d'une matrice combustible chargée en oxyde de titane, en ce que la teneur pondérale en oxyde de titane est comprise entre 10% et 30% par rapport au poids total du manchon, et en ce que la matrice combustible comprend de la nitrocellulose fibreuse, de la cellulose fibreuse et une résine organique.
- Douille métallique selon la revendication 1, caractérisée en ce que la matrice combustible est essentiellement constituée de nitrocellulose fibreuse, de cellulose fibreuse et de résine organique.
- Douille métallique selon la revendication 1, caractérisée en ce que le rapport pondéral résine/nitrocellulose + cellulose est compris entre 0,05 et 0,15 et en ce que le rapport pondéral nitrocellulose/cellulose est compris entre 8 et 1/2.
- Douille métallique selon la revendication 1, caractérisée en ce que la résine organique est choisie dans le groupe constitué par les résines acryliques, les résines vinyliques, les latex à base de butadiène, et leurs mélanges.
- Douille métallique selon la revendication 1, caractérisée en ce que le manchon présente extérieurement des cannelures longitudinales venant en contact avec la surface intérieure de la jupe de la douille.
- Douille métallique selon la revendication 1, caractérisée en ce que le manchon présente une fente longitudinale ou hélicoïdale sur toute sa longueur.
- Douille métallique selon la revendication 1, caractérisée en ce que le manchon est constitué par un empilage de plusieurs tronçons.
- Munition pour armes à feu comprenant une douille métallique munie d'une amorce, d'un projectile, et contenant un chargement propulsif combustible, caractérisée en ce que la douille est une douille selon l'une quelconque des revendications 1 à 7.
- Appoint anti-érosif destiné à intérieurement revêtir une douille métallique de munition pour armes à feu, caractérisé en ce que cet appoint est un manchon rigide constitué d'une matrice combustible chargée en oxyde de titane, en ce que la teneur pondérale en oxyde de titane est comprise entre 10% et 30% par rapport au poids total du manchon, et en ce que la matrice combustible comprend de la nitrocellulose fibreuse, de la cellulose fibreuse et une résine organique.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9907219A FR2794854B1 (fr) | 1999-06-08 | 1999-06-08 | Douille metallique de munition pour armes a feu interieurement revetue d'un manchon anti-erosif |
FR9907219 | 1999-06-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1059505A1 EP1059505A1 (fr) | 2000-12-13 |
EP1059505B1 true EP1059505B1 (fr) | 2004-01-21 |
Family
ID=9546519
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00401523A Expired - Lifetime EP1059505B1 (fr) | 1999-06-08 | 2000-05-30 | Douille métallique de munition pour armes à feu interieurement revêtue d'un manchon anti-érosif |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1059505B1 (fr) |
AT (1) | ATE258305T1 (fr) |
DE (1) | DE60007799T2 (fr) |
FR (1) | FR2794854B1 (fr) |
IL (1) | IL136555A (fr) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB998450A (en) * | 1956-11-14 | 1965-07-14 | Mini Of Nat Defence Of Canada | Reduction of gun barrel wear |
GB950607A (en) | 1959-08-14 | 1964-02-26 | Military Training Device Co Ak | Improvements in or relating to ammunition cartridges |
DE1578199B1 (de) * | 1966-01-24 | 1970-03-05 | Prb Nv | Kartusche od.dgl.fuer Feuerwaffen |
FR1526983A (fr) | 1966-01-24 | 1968-05-31 | Prb Nv | Réducteur d'érosion |
US3403625A (en) * | 1968-01-18 | 1968-10-01 | Wegematic Corp | Wear reduction additives |
DE3544907A1 (de) * | 1985-12-19 | 1987-06-25 | Diehl Gmbh & Co | Additiv-manschette fuer grosskalibrige geschuetzmunition zur schonung des waffenrohres |
-
1999
- 1999-06-08 FR FR9907219A patent/FR2794854B1/fr not_active Expired - Fee Related
-
2000
- 2000-05-30 DE DE60007799T patent/DE60007799T2/de not_active Expired - Lifetime
- 2000-05-30 AT AT00401523T patent/ATE258305T1/de active
- 2000-05-30 EP EP00401523A patent/EP1059505B1/fr not_active Expired - Lifetime
- 2000-06-05 IL IL13655500A patent/IL136555A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE60007799T2 (de) | 2004-11-25 |
FR2794854B1 (fr) | 2002-05-17 |
FR2794854A1 (fr) | 2000-12-15 |
EP1059505A1 (fr) | 2000-12-13 |
IL136555A (en) | 2003-03-12 |
DE60007799D1 (de) | 2004-02-26 |
IL136555A0 (en) | 2001-06-14 |
ATE258305T1 (de) | 2004-02-15 |
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