EP1431701A1 - Hülsenlose Munition und Montageverfahren für eine solche Munition - Google Patents

Hülsenlose Munition und Montageverfahren für eine solche Munition Download PDF

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Publication number
EP1431701A1
EP1431701A1 EP03028775A EP03028775A EP1431701A1 EP 1431701 A1 EP1431701 A1 EP 1431701A1 EP 03028775 A EP03028775 A EP 03028775A EP 03028775 A EP03028775 A EP 03028775A EP 1431701 A1 EP1431701 A1 EP 1431701A1
Authority
EP
European Patent Office
Prior art keywords
block
projectile
ammunition
sheath
ammunition according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03028775A
Other languages
English (en)
French (fr)
Inventor
Jean-Francois Pierrot
Jean-Luc Taillandier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nexter Munitions SA
Original Assignee
Giat Industries SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giat Industries SA filed Critical Giat Industries SA
Publication of EP1431701A1 publication Critical patent/EP1431701A1/de
Withdrawn legal-status Critical Current

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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
    • F42B5/18—Caseless ammunition; Cartridges having combustible cases
    • F42B5/181—Caseless ammunition; Cartridges having combustible cases consisting of a combustible casing wall and a metal base; Connectors therefor
    • 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
    • F42B5/18—Caseless ammunition; Cartridges having combustible cases
    • 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
    • F42B5/18—Caseless ammunition; Cartridges having combustible cases
    • F42B5/192—Cartridge cases characterised by the material of the casing wall
    • 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
    • F42B5/18—Caseless ammunition; Cartridges having combustible cases
    • F42B5/192—Cartridge cases characterised by the material of the casing wall
    • F42B5/196—Coatings

Definitions

  • the technical field of the invention is that of ammunition and more particularly large ammunition caliber (greater than or equal to 50mm).
  • This ammunition is intended to be fired from a armored combat vehicle.
  • shutter base a base metallic called shutter base. This base carries a tube igniter and it is the only part of the ammunition that is ejected from the chamber after the shot to be stored in a base bag placed in the turret.
  • the patent FR2622687 describes by way of example such a known ammunition.
  • the known combustible cases are manufactured according to the paper techniques. They are expensive to obtain and have a thickness greater than a millimeter which reduces volume available for propellant charge.
  • the ammunition according to the invention makes it possible to increase, with reduced cost, the volume of propellant charge without reduce the mechanical resistance of the ammunition.
  • the subject of the invention is a munition comprising a projectile, propellant charge and a device of ignition of the latter which is integral with a base sealing, ammunition characterized in that the load propellant comprises at least one agglomerated charge block which is covered with a protective sheath, the base being also made integral with a part rear of the projectile by a connecting means.
  • this munition comprises a connecting ring secured to the projectile and surrounding at at least part of an agglomerated load block, ring link comprising a cylindrical seat which is surrounded by the protective sheath.
  • the protective sheath may be a sheath made of a heat shrinkable material.
  • the protective sheath may be a sheath made of a composite material combining a reinforcement and a binder.
  • At least one agglomerated load block may have on one of its faces a cooperating bowl with a curved surface of a neighboring block to limit the transverse displacements of a block compared to the other.
  • Each block may have a flat annular surface, surrounding a bowl or a curved surface complementary to a bowl of a neighboring block, the surfaces flat annulars of two adjacent blocks being separated by a game.
  • Each block may have on its external surface longitudinal notches.
  • the connecting means may include a rod which present a nose that can be made integral with a part back of the projectile and a base that can be returned secured to the base.
  • the rod may constitute part of the device ignition.
  • the ignition device may have at least one ignition transmission cord.
  • the propellant charge may also include a rear unit with internal housing inside which will have a propellant charge.
  • the invention also relates to a mounting method of such ammunition.
  • the protective sheath is a sheath heat shrink
  • a munition 1 according to a particular embodiment of the invention comprises a projectile 2, propellant charge 3 and a device ignition 5 of this propellant charge.
  • Projectile 2 shown here is an exercise ball comprising a massive body 2a and a tail 2b terminated by a empennage 29.
  • the projectile could of course be a sub-calibrated projectile (comprising a rod secured to a hoof) or an explosive caliber projectile.
  • the structure of the projectile itself is not the subject of the present invention and therefore it is not necessary to describe in more detail.
  • the ignition device 5 is integral with a base sealing 6 which in a known manner comprises a body solid metal with a sealing lip in rubber 6a.
  • a base sealing 6 which in a known manner comprises a body solid metal with a sealing lip in rubber 6a.
  • Such a base is described by the patent US4159678.
  • the propellant charge 3 of the ammunition comprises at least one agglomerated charge block 4, here three blocks 4a, 4b and 4c stacked.
  • Blocks 4a, 4b and 4c of agglomerated charge are constituted in a conventional manner by a propellant powder formed of grains agglomerated by a binder. Such blocks are described for example by patents US3092525, US5516378 and FR2776656.
  • Each block 4 has an internal profile allowing it to be placed around the tail 2b of the projectile 2.
  • the front unit 4a has a conical internal profile 8, substantially matching the conical profile of the tail, as well as longitudinal slots 9 allowing passage fins of the empennage 29 (see FIG. 2).
  • the front block 4a also has a conical front external profile which housed in a ring 14 fixed in a peripheral groove 15 of projectile 2 (such a ring is described in the patent FR2801667).
  • the front unit 4a also has a cylindrical surface 16 on which is positioned a cylindrical surface 14a of the ring 14.
  • the intermediate block 4b comprises, like the front block 4a, slots 10 allowing the passage of the fins of the tailplane (see Figure 3).
  • the rear unit 4c has an axial channel 11 leaving pass a rod 12 secured to the ignition device 5. It has a curved rear profile which is housed in the base 6.
  • the rear unit 4c also includes a cavity 26 allowing the development of the flame generated by the ignition device 5. This cavity also makes it possible to facilitate the installation of transmission cords 25 and their connection to the device ignition 5.
  • the cavity may contain another load block agglomerated 27 or a sachet of propellant powder in grains. Such an arrangement facilitates ignition of the rear unit 4c.
  • each block 4 comprises at least a planar annular surface 31a or 31b which is arranged around bowl 13 or the curved surface complementary to the bowl.
  • the annular surfaces 31a and 31b of two consecutive blocks are separated by a set 30 of the order of a millimeter. So blocks 4 are only in contact than at the bowl 13.
  • blocks 4a, 4b and 4c have their surface external cylindrical surrounded by a protective sheath 7 which also surrounds the cylindrical seat 14a of the ring connecting 14 secured to the projectile.
  • This protective sheath 7 also covers partially the rear curved portion of the rear block 4c and it is thus interposed between the base 6 and the rear block 4c.
  • the sheath 7 is a sheath made of a heat-shrinkable material.
  • Such materials are well known to those skilled in the art. They are commonly used in the field of electricity for connecting cables in the form of strands. They are most often based on polyolefin.
  • the tubes When the tubes are heated to a temperature of the order of 100 ° C their initial diameter is reduced and they then enclose the propellant charge blocks as well as the connecting ring 14.
  • the shrinking temperature of the tubes is well below the auto ignition temperature of propellants (around 165 ° C). There is no risk fear of such an operation.
  • the sheath 7 has the function of ensuring the protection of agglomerated load blocks against humidity and shocks.
  • This sheath does not fulfill the same function as that of a combustible socket according to the prior art. She does not thus ensure the mechanical maintenance of the load propellant with respect to the projectile.
  • the thickness of the sheath is around 0.5 mm which is less than the thickness a conventional combustible case (about 3 mm). The result an increase in the mass of the propellant charge at close range 10% compared to an agglomerated load incorporated in a conventional combustible case (11 kg instead of 10 kg for a 120mm caliber) and 30% compared to a load grain propellant (8.3 kg).
  • the mechanical connection of the propellant and projectile loading is ensured by a connecting means comprising the rear rod 12 secured to the ignition device 5.
  • the rod 12 comprises a nose 12a of reduced diameter which enters a hole 17 carried by the empennage 29 of the projectile.
  • the nose 12a has a groove 18 which receives a split elastic ring 19.
  • the hole 17 also includes a internal groove 20.
  • the elastic ring 19 has a chamfer whose inclination allows the introduction of the bearing nose the ring 19 inside the hole 17.
  • the ring 19 has its diameter which is reduced during this introduction. He resumed by elasticity its original diameter when it is in look of the throat 20, thus ensuring the joining axial of the rod 12 and of the projectile 2.
  • the rod 12 has a base 21 having a bearing cylindrical threaded receiving the base 6.
  • the latter is fixed at the base 21 by means of a nut 22.
  • Such a base fixed by nut is described in more detail in the patent FR2799831 which may be referred to.
  • the rod 12 constitutes a part of the ignition device 5.
  • the ignition device comprises in a known manner a ignition pyrotechnic charge (not shown) which is disposed in a cavity 23 internal to the rod 12 (see figure 4). This charge is initiated by an integral igniter 24 of the base 21. Radial holes 28 ensure the diffusion of the flame generated outside the rod 12.
  • the ignition device 4 will also include at least one ignition transmission cord 25 (see also Figures 2 and 3).
  • This cord can be formed by a ITLX pyrotechnic cord of the type described by the patent applications US4917017 or US5179250.
  • This cord could also simply be constituted by an inert flexible plastic diffuser tube allowing the flame produced by the charge to be conducted ignition.
  • a diffuser tube is described by the request. FR01 / 09053.
  • the ignition transmission cords will be introduced in holes made in the different propellants 4 which will be oriented angularly with respect to the others during assembly to ensure alignment of the holes.
  • the cords will distribute evenly the ignition of the different blocks from the device ignition 5.
  • the ignition device may also include a plasma igniter of the type described by the patents FR2807610 or FR2807611.
  • the connecting ring 14 is fixed at the groove 15 of the projectile 2.
  • the rod 12 of the ignition device 4 is introduced into the hole 17 in the rear part of the projectile 2.
  • the base 6 is fixed to the ignition device 4 at using nut 22.
  • the invention makes it possible to produce ammunition having an increased propellant mass without the mechanical strength is reduced. Besides the cost of a heat shrink tubing is very reduced and well lower than that of a combustible case.
  • the sheath is destroyed when fired and ejected with the gases propulsion.
  • sheath heat shrinkable 7 by a sheath made of a material composite combining a reinforcement (such as glass fibers or carbon) and a binder such as an epoxy resin or Phenolic.
  • a reinforcement such as glass fibers or carbon
  • a binder such as an epoxy resin or Phenolic
  • This sheath will be made directly around the blocks set up on the projectile.
  • This solution has the advantage to increase the mechanical resistance of the stacking of blocks.
  • FIG. 6 shows in section a munition according to a another embodiment of the invention.
  • This ammunition differs from the previous one in that each block 4 comprises on its external cylindrical surface of the longitudinal notches 32. These notches have a reduced depth (of the order of millimeter). They are regularly distributed angularly and extend logitudinally over the entire length of a block. Again the sheath 7 surrounds the block and it applies on this one also inside the notches 32.
  • the blocks 4 are oriented during assembly so that that the notches 32 (just like the through holes of the ignition transmission cords) are arranged in the extension of each other.
  • a munition is thus obtained whose external surface has notches which extend over substantially the whole the length of the propellant charge and which constitute chimneys allowing a passage of propellant gases between the weapon chamber and propellant blocks 4. We facilitate thus the fragmentation of the sheath 7 during the firing as well as its evacuation out of the weapon.
  • the notches could of course be in number and / or different distribution, as well as having shapes and / or different dimensions.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Air Bags (AREA)
EP03028775A 2002-12-18 2003-12-13 Hülsenlose Munition und Montageverfahren für eine solche Munition Withdrawn EP1431701A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0216256 2002-12-18
FR0216256A FR2849179B1 (fr) 2002-12-18 2002-12-18 Munition sans douille et procede de montage d'une telle munition

Publications (1)

Publication Number Publication Date
EP1431701A1 true EP1431701A1 (de) 2004-06-23

Family

ID=32338970

Family Applications (1)

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EP03028775A Withdrawn EP1431701A1 (de) 2002-12-18 2003-12-13 Hülsenlose Munition und Montageverfahren für eine solche Munition

Country Status (2)

Country Link
EP (1) EP1431701A1 (de)
FR (1) FR2849179B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009018900A1 (de) * 2007-08-09 2009-02-12 Rheinmetall Waffe Munition Gmbh Verfahren zur verbindung des an einem geschoss angeordneten hülsendeckels an dem hülsenmantel einer patrone
US11248884B2 (en) * 2019-03-27 2022-02-15 Nexter Munitions Cartridge with igniter cords
US11988491B1 (en) 2021-07-29 2024-05-21 Revolutionary Rounds L.L.C. Projectile and caseless cartridge

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703868A (en) * 1970-07-07 1972-11-28 Hercules Inc Protective surface covering having heat and moisture resistant properties for caseless ammunition
FR2590013A1 (fr) * 1985-11-12 1987-05-15 France Etat Armement Vernis protecteur contre la thermo-initiation d'une munition sans douille ou a douille combustible
EP0304100A1 (de) * 1987-08-21 1989-02-22 Nobel Kemi AB Verfahren zum Herstellen von Treibladungen und mittels eines solchen Verfahrens hergestellte Treibladungen
US4917017A (en) 1988-05-27 1990-04-17 Atlas Powder Company Multi-strand ignition systems
DE3927400A1 (de) * 1989-08-19 1991-02-21 Rheinmetall Gmbh Verbrennbare treibladungshuelse
WO1991005981A1 (en) * 1989-10-19 1991-05-02 General Defense Corporation A cartridge assembly
US5179250A (en) 1989-10-19 1993-01-12 Olin Corporation Segmented cartridge assembly
WO1997025586A1 (en) * 1996-01-04 1997-07-17 Dineen John J Case base/combustible cartridge case joint
US5712445A (en) * 1993-05-04 1998-01-27 Alliant Techsystems Inc. Propellant system
FR2807610A1 (fr) 2000-04-11 2001-10-12 Giat Ind Sa Torche a plasma incorporant un fusible d'amorcage reactif et tube allumeur integrant une telle torche
FR2807611A1 (fr) 2000-04-11 2001-10-12 Giat Ind Sa Torche plasma comportant des electrodes separees par un entrefer et allumeur incorporant une telle torche
US20010047072A1 (en) * 2000-05-02 2001-11-29 Sanderson Andrew J. Chain-extended poly(bis-azidomethyloxetane), and combustible cartridge cases and ammunition comprising the same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2622687B1 (fr) 1987-10-29 1993-05-28 France Etat Armement Chargement propulsif pour munition comportant un projectile empenne ainsi que son procede de realisation

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703868A (en) * 1970-07-07 1972-11-28 Hercules Inc Protective surface covering having heat and moisture resistant properties for caseless ammunition
FR2590013A1 (fr) * 1985-11-12 1987-05-15 France Etat Armement Vernis protecteur contre la thermo-initiation d'une munition sans douille ou a douille combustible
EP0304100A1 (de) * 1987-08-21 1989-02-22 Nobel Kemi AB Verfahren zum Herstellen von Treibladungen und mittels eines solchen Verfahrens hergestellte Treibladungen
US4917017A (en) 1988-05-27 1990-04-17 Atlas Powder Company Multi-strand ignition systems
DE3927400A1 (de) * 1989-08-19 1991-02-21 Rheinmetall Gmbh Verbrennbare treibladungshuelse
WO1991005981A1 (en) * 1989-10-19 1991-05-02 General Defense Corporation A cartridge assembly
US5179250A (en) 1989-10-19 1993-01-12 Olin Corporation Segmented cartridge assembly
US5712445A (en) * 1993-05-04 1998-01-27 Alliant Techsystems Inc. Propellant system
WO1997025586A1 (en) * 1996-01-04 1997-07-17 Dineen John J Case base/combustible cartridge case joint
FR2807610A1 (fr) 2000-04-11 2001-10-12 Giat Ind Sa Torche a plasma incorporant un fusible d'amorcage reactif et tube allumeur integrant une telle torche
FR2807611A1 (fr) 2000-04-11 2001-10-12 Giat Ind Sa Torche plasma comportant des electrodes separees par un entrefer et allumeur incorporant une telle torche
US20010047072A1 (en) * 2000-05-02 2001-11-29 Sanderson Andrew J. Chain-extended poly(bis-azidomethyloxetane), and combustible cartridge cases and ammunition comprising the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009018900A1 (de) * 2007-08-09 2009-02-12 Rheinmetall Waffe Munition Gmbh Verfahren zur verbindung des an einem geschoss angeordneten hülsendeckels an dem hülsenmantel einer patrone
US11248884B2 (en) * 2019-03-27 2022-02-15 Nexter Munitions Cartridge with igniter cords
US11988491B1 (en) 2021-07-29 2024-05-21 Revolutionary Rounds L.L.C. Projectile and caseless cartridge

Also Published As

Publication number Publication date
FR2849179B1 (fr) 2006-06-30
FR2849179A1 (fr) 2004-06-25

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