EP0752571B1 - Kurzbahngeschoss - Google Patents

Kurzbahngeschoss Download PDF

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Publication number
EP0752571B1
EP0752571B1 EP96401341A EP96401341A EP0752571B1 EP 0752571 B1 EP0752571 B1 EP 0752571B1 EP 96401341 A EP96401341 A EP 96401341A EP 96401341 A EP96401341 A EP 96401341A EP 0752571 B1 EP0752571 B1 EP 0752571B1
Authority
EP
European Patent Office
Prior art keywords
projectile
rear part
plastic material
front part
plastic
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
Application number
EP96401341A
Other languages
English (en)
French (fr)
Other versions
EP0752571A1 (de
Inventor
Pierre Lalanne
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.)
Giat Industries 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 EP0752571A1 publication Critical patent/EP0752571A1/de
Application granted granted Critical
Publication of EP0752571B1 publication Critical patent/EP0752571B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F42B8/00—Practice or training ammunition
    • F42B8/12—Projectiles or missiles
    • F42B8/14—Projectiles or missiles disintegrating in flight or upon impact

Definitions

  • the technical field of the invention is that of projectiles having a shortened trajectory and in particular that of exercise shots.
  • EP96617 discloses an exercise ball with reduced range comprising a one-piece body made in one plastic loaded with metallic particles. The range of the ball is reduced thanks to the choice of a material lightened.
  • Patent W09316349 describes a projectile for a tunnel shot whose trajectory is not reduced but which is disintegrates on impact against the walls of the shooting tunnel.
  • Patent US3170405 proposes a projectile which disintegrates as soon as it leaves the barrel. It includes a plastic envelope which contains a powder metallic.
  • This document describes a projectile which has a part forward intended to have a ballistic trajectory, which allows you to shoot at a target.
  • the mass of the front part is however much lower to that of a normal projectile.
  • the result is a trajectory shortened ballistics which authorizes a safe shooting on areas of land with reduced dimensions.
  • This projectile also has a rear part which disintegrates when fired at the exit of the barrel.
  • the back has a shirt filled with a compressed metal powder.
  • the powder can agglomerate and resist more bursting, thus modifying the separation conditions front and rear parts and the performance of the projectile from the point of view of shooting accuracy.
  • the projectile according to the invention is of design simple and inexpensive to manufacture. It includes front and rear parts that separate reliably and reproducible at the exit of the barrel of the weapon without cause wear on the tube, or spread metal powder dangerous for the shooter.
  • the projectile proposed by the invention is easily adaptable to any caliber of weapon and it ensures in all case a precise and reproducible ballistic trajectory, thus allowing a shooting exercise in conditions close to shooting with war projectiles.
  • the subject of the invention is a projectile with shortened trajectory comprising a front part intended for have a ballistic trajectory and a rear part which disintegrates when fired, projectile characterized in that the rear part at least made of plastic and the front and rear parts each have a profile external to the caliber of the weapon, profile which is intended for take the scratches from the gun.
  • the rotational drive ensures a reproducible external ballistics for the front part (thanks to gyrostabilization) and it facilitates the separation between the front and rear parts, which reduces disturbance caused by the rear part on the front part.
  • the front part and the rear part are made of the same material plastic and form a one-piece body, the front part being separated from the rear part by a breaking point annular.
  • the body of projectile is made of a fragile plastic liable to burst under the action of centrifugal forces developed during firing, the front part being surrounded by a jacket of sufficient thickness to prevent it from bursting.
  • the shirt can be produced in one plastic material such as Polyamide, it could also be made of brass.
  • the front part and the rear part of the projectile are made of materials different plastics, the plastic constituting the rear part being a fragile material susceptible burst under the action of the centrifugal forces developed when firing.
  • the rear part may be extended by a nipple which enters a housing in the front part and ensures the connection of these two parties.
  • plastic Preferably used as plastic fragile a plastic charged with a powder metallic.
  • the rear part of the projectile carries at least one initiator of longitudinal rupture.
  • a projectile 1 is shown attached by a crimp 3 to a front part of a shell 2.
  • the projectile has a front part 4 and a rear part 5 which are separated from each other by a throat 6.
  • the maximum diameter ( ⁇ 1) of the front part 4 is substantially equal to that ( ⁇ 2) of the rear part 5, these two parts being of the caliber of the weapon. So the parties front 4 and rear 5 have an external profile such that both take the scratches from the gun barrel when shoot.
  • the groove 6 constitutes a beginning of rupture which separates the front part 4 of the rear part 5. It also receives the annular crimping 3 of the sleeve and ensures the attachment of the projectile to the socket.
  • the rear part 5 of the projectile 1 also includes fracture primers 7 which extend longitudinally from groove 6 to the rear of the projectile. These primers of breaks are made in the form of grooves regularly distributed angularly (see also the Figure 1b).
  • the body of the projectile 1 is preferably made in one plastic charged with metallic particles, for example example in plastic loaded with bronze or tungsten.
  • plastic charged with metallic particles for example example in plastic loaded with bronze or tungsten.
  • materials that can be used to make the projectile are described for example by patents FR-A-2528564 and FR-A-2691156.
  • the metallic particles can be chosen from the following materials: bronze, copper, lead, tungsten.
  • the diameter of the metal particles will be between 0.04 and 0.1mm.
  • Additives may be added to this material, for example example a solid lubricant like molybdenum disulphide, which reduces friction between the projectile and the barrel of the weapon when firing which reduces wear on the barrel.
  • a solid lubricant like molybdenum disulphide
  • We can also provide an anti-shock additive such as acrylic resin such as styrene butadiene methacrylate
  • an anti-shock additive such as acrylic resin such as styrene butadiene methacrylate
  • the breaking point 6 is placed so that the mass of the front part is different that of the rear part (and preferably less than that of the rear part). The result is a differential acceleration between the two parties which causes a torsional shear at the point of failure 6.
  • the axial acceleration of the projectile increases the stresses undergone by its reduced section at the level of the initiation of rupture 6 and also promotes the separation of two parts of the projectile.
  • Front and rear parts separate from each other at the exit of the barrel of the weapon (or even inside the tube).
  • the front part pursues a ballistic trajectory which is shortened compared to that of a complete projectile in because of its reduced mass.
  • the rear part 5 bursts at the exit of the barrel of the weapon thanks to the presence of the longitudinal breaking primers 7 which weaken it.
  • the advantage of this first embodiment is that it allows the projectile to be produced by a single molding or injection (monobloc projectile).
  • Figure 2 shows a second embodiment of the projectile 1 according to the invention.
  • the front part 4 includes a core 8 made of fragile plastic (plastic loaded with metallic powder) which is covered with a shirt 9 made of resistant material.
  • the core 8 forms a single piece with the part rear 5 of the projectile and thus constitutes a body of projectile whose front part is covered by the shirt.
  • the external diameters ⁇ 1 and ⁇ 2 of the front parts and back again are chosen so as to take both the scratches on the weapon.
  • the front and rear parts are separated by a groove 6 which constitutes a beginning of rupture and also allows the fixing the projectile on the sleeve 2 by crimping the latter.
  • This particular embodiment makes it possible to work to make the projectile a very plastic fragile, for example comprising a metallic filler significant (greater than 85%), while ensuring mechanics of the front part (thanks to the shirt).
  • Figure 3 shows a projectile 1 following a third embodiment in which the front part 4 and the rear part 5 are each made of a material different plastic.
  • the rear part 5 is made of a plastic material fragile (plastic loaded with metal) and it is defined by so as to be able to burst at the exit of the barrel of the weapon by the effect of centrifugal forces.
  • the front part 4 is made of a plastic material more resistant, for example an unfilled polyamide, or less loaded as the rear part.
  • the rear part 5 carries a frustoconical stud 10 which is placed in a corresponding housing 11 of the front part 4. This ensures the coaxiality of the parts front and rear.
  • the projectile can be produced in a single bi-injection mold. We can also make the front parts and back independently and then fix them by collage.
  • FIG. 4 represents another embodiment, derived from that of figure 3, and in which the part front 4 of projectile 1 has a core 12 covered with a shirt 9.
  • the rear part is made of plastic fragile and it is linked to the front part by cooperation of the stud 10 with the frustoconical housing 11.
  • This embodiment allows part front of upper mass by combining a core 12 in material heavy plastic (but very fragile) with a shirt ensuring the mechanical strength of the front part.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Road Signs Or Road Markings (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Electroluminescent Light Sources (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Radar Systems Or Details Thereof (AREA)

Claims (9)

  1. Geschoss (1) mit verkürzter Bahn bestehend aus einem vorderen Teil (4) für eine ballistische Bahn und einem hinteren Teil (5), der beim Abschießen zerfällt, gekennzeichnet dadurch, dass mindestens der hintere Teil (5) aus einem Kunststoff besteht, und dass der vordere Teil (4) und der hintere Teil (5) jeweils ein Aussenprofil gemäß dem Waffenkaliber aufweisen, welches Profil sich in die Rillen der Waffen einfügt.
  2. Geschoss gemäß dem Anspruch 1, gekennzeichnet dadurch, dass der vordere Teil (4) und der hintere Teil (5) aus dem gleichen Kunststoff gefertigt werden und einen einteiligen Körper, wobei der vordere Teil (4) vom hinteren Teil (5) durch einen ringförmigen Bruchansatz (6) getrennt wird.
  3. Geschoss gemäß dem Anspruch 2, gekennzeichnet dadurch, dass der Körper aus einem zerbrechlichen Kunststoff gefertigt wird, der unter der Einwirkung der beim Abschießen entstehenden Zentrifugalkräfte zerplatzen kann, wobei der vordere Teil (4) von einem Mantel (9) mit ausreichender Stärke umgeben ist, um das Platzen des vorderen Teils (4) zu verhindern.
  4. Geschoss gemäß dem Anspruch 3, gekennzeichnet dadurch, dass der Mantel (9) aus einem Kunststoff wie zum Beispiel aus Polyamid besteht.
  5. Geschoss gemäß dem Anspruch 3, gekennzeichnet dadurch, dass der Mantel (9) aus Messing besteht.
  6. Geschoss gemäß dem Anspruch 1, gekennzeichnet dadurch, dass der vordere Teil (4) und der hintere Teil (5) aus verschiedenen Kunststoffen bestehen, wobei der Kunststoff des hinteren Teils ein zerbrechlicher Werkstoff ist, und unter der Einwirkung der beim Abschuss entstehenden Zentrifugalkräfte platzt.
  7. Geschosse gemäß dem Anspruch 6, gekennzeichnet dadurch, dass der hintere Teil (5) durch einen Ansatz (10) verlängert wird, der in die Aussparung (11) des vorderen Teils (4) eindringt und die Verbindung der beiden Teile gewährleistet.
  8. Geschoss gemäß einem der Ansprüche 3 bis 7, gekennzeichnet dadurch, dass der zerbrechliche Kunststoff ein Kunststoff mit Metallpulveranteil ist.
  9. Geschoss gemäß einem der Ansprüche 1 bis 8, gekennzeichnet dadurch, dass der hintere Teil (5) mindestens einen Längsbruchansatz (7) trägt.
EP96401341A 1995-07-07 1996-06-20 Kurzbahngeschoss Expired - Lifetime EP0752571B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9508247A FR2736426B1 (fr) 1995-07-07 1995-07-07 Projectile a trajectoire raccourcie
FR9508247 1995-07-07

Publications (2)

Publication Number Publication Date
EP0752571A1 EP0752571A1 (de) 1997-01-08
EP0752571B1 true EP0752571B1 (de) 2000-07-12

Family

ID=9480798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96401341A Expired - Lifetime EP0752571B1 (de) 1995-07-07 1996-06-20 Kurzbahngeschoss

Country Status (4)

Country Link
EP (1) EP0752571B1 (de)
AT (1) ATE194704T1 (de)
DE (1) DE69609251T2 (de)
FR (1) FR2736426B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59900266D1 (de) * 1999-02-25 2001-10-25 Contraves Pyrotec Ag Unterkalibergeschoss
EP1851503B1 (de) * 2005-02-16 2010-11-10 Saltech AG Geschoss
US9157713B1 (en) 2013-03-15 2015-10-13 Vista Outdoor Operations Llc Limited range rifle projectile

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE627704A (de) * 1962-03-17
FR2528564B1 (fr) * 1982-06-11 1986-12-19 Munitions Ste Fse Balle d'exercice a base de matiere plastique
DE3565891D1 (en) * 1984-07-17 1988-12-01 Eidgenoess Munitionsfab Thun Missile for practice ammunition having a limited range, and use of the same
US5035183A (en) * 1990-03-12 1991-07-30 David Luxton Frangible nonlethal projectile
US5237930A (en) * 1992-02-07 1993-08-24 Snc Industrial Technologies, Inc. Frangible practice ammunition
FR2691156A1 (fr) * 1992-05-13 1993-11-19 Sfm Defense Matière plastique de haute densité, notamment pour la réalisation de balles pour le tir d'exercice.

Also Published As

Publication number Publication date
EP0752571A1 (de) 1997-01-08
ATE194704T1 (de) 2000-07-15
FR2736426A1 (fr) 1997-01-10
DE69609251T2 (de) 2001-01-04
FR2736426B1 (fr) 1997-08-08
DE69609251D1 (de) 2000-08-17

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