EP0626555A1 - Übungsgeschloss und Verfahren zur Herstellung - Google Patents

Übungsgeschloss und Verfahren zur Herstellung Download PDF

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Publication number
EP0626555A1
EP0626555A1 EP94401117A EP94401117A EP0626555A1 EP 0626555 A1 EP0626555 A1 EP 0626555A1 EP 94401117 A EP94401117 A EP 94401117A EP 94401117 A EP94401117 A EP 94401117A EP 0626555 A1 EP0626555 A1 EP 0626555A1
Authority
EP
European Patent Office
Prior art keywords
sectors
projectile
cap
projectile according
holding means
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.)
Granted
Application number
EP94401117A
Other languages
English (en)
French (fr)
Other versions
EP0626555B1 (de
Inventor
Jean-Marie Godefroy
Philippe Maillard
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.)
Manurhin Defense SA
Original Assignee
Manurhin Defense 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 Manurhin Defense SA filed Critical Manurhin Defense SA
Publication of EP0626555A1 publication Critical patent/EP0626555A1/de
Application granted granted Critical
Publication of EP0626555B1 publication Critical patent/EP0626555B1/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 present invention is that of ammunition and exercise projectiles and more particularly that of projectiles which disintegrate at the exit of the barrel of a weapon.
  • ammunition of exercise one distinguishes generally those which are intended to reproduce the real ballistics of a war projectile, but on a reduced distance and those which are intended to reproduce only the environment suitable for shooting (noise, recoil, fumes ).
  • the first type of ammunition for practice can be illustrated by the patents FR2509457 and DE734429 which both describe a projectile comprising a body formed by the assembly of several segments.
  • This projectile is intended to reproduce the actual ballistics of a war projectile over a certain distance. It thus comprises means which make it possible to secure the joining of the different segments over part of the trajectory. It requires the installation of a shooting safety template and cannot be used to reproduce only the shooting environment.
  • This charge must in particular be sufficiently dense and compact to ensure the mechanical strength of the projectile, but it must still be easily dispersed at the exit of the barrel of the weapon.
  • the projectile according to the invention is inexpensive and does not degrade the barrel of the weapon. It also has excellent storage behavior even in the harshest climatic environments.
  • the invention also relates to a particularly advantageous manufacturing method for such an exercise projectile.
  • the subject of the invention is an exercise projectile which is characterized in that it comprises a body formed by the assembly of several sectors and a base having a housing intended to receive the different sectors, the sectors being produced in a plastic material, projectile comprising means ensuring maintenance of the assembly of the sectors during the handling phases, means designed so as to release the sectors at the exit of the barrel of a weapon when the projectile is fired.
  • the sectors are preferably made of a material of the thermoplastic type.
  • the holding means can comprise a cap surrounding a front part of the projectile.
  • the cap can carry a bead which penetrates into an annular groove arranged on the sectors and ensures the fixing of the cap on the latter.
  • the first group of sectors delimits dwellings in which the other sectors are arranged, and the latter which constitute a second group of sectors are held together with the previous ones by a cover.
  • the second group of sectors can be formed in one piece with the cover.
  • the sectors are welded two by two along their external contact edges.
  • the different sectors are produced by a single molding operation, all of them connected in a star by their tapered ends.
  • an exercise projectile 1 according to a first embodiment of the invention comprises a body 2 formed by the assembly of six identical sectors 3a, 3b, 3c, 3d, 3e and 3f.
  • Each sector is delimited by two intersecting planes 4a, 4b which form an angle of 60 °.
  • each sector is in contact with two neighboring sectors at its intersecting planes.
  • the absence of empty space between the sectors ensures excellent rigidity of the projectile.
  • the projectile also includes a base 5 which has a housing 6 intended to receive the sectors 3.
  • the base 5 carries an annular bulge 7 which constitutes a belt intended to come to seal the propellant gases in the barrel of the weapon.
  • the base also carries an annular groove 8 intended to allow the projectile to be secured to a propellant charge case (not shown).
  • the base 5 has an internal rim 9 which penetrates into a groove 10 arranged on the body 2. This rim secures the base and the body.
  • the main function of the base is to seal the propellant gases in the barrel, on the one hand thanks to the belt 7, and on the other hand thanks to the bottom wall 11 of the base which prevents gases from entering between the different sectors.
  • the sectors and the base are made of a plastic material of the thermoplastic type. These elements are obtained for example by injection. This material allows the projectile to withstand the various temperature and humidity constraints encountered during storage.
  • thermoplastic materials can be considered. We can for example choose from the following materials: Polyethylene, Polyamide, Polypropylene, Polystyrene, Polycarbonate, Polyphenylene Oxide and Acrylonitrile Butadiene Styrene.
  • the projectile comprises means ensuring maintenance of the assembly of the sectors during the transport and handling phases.
  • these means comprise a welding point 12 which secures the various sectors at a front part 13 of the projectile.
  • This welding can be carried out by locally heating the front part 13 of the projectile.
  • the holding means are designed so as to free the sectors at the outlet of the barrel of a weapon when the projectile is fired.
  • the mechanical strength of the weld is not sufficient to withstand the stresses developed during firing.
  • the sectors Due to the lightness of the plastic, the sectors are quickly braked after their separation at the outlet of the tube. They will be dispersed a short distance from the weapon (of the order of 50 m for a caliber of 20 millimeters).
  • the holding in the tube is excellent because the sectors constitute a rigid projectile body, the bursting at the exit of the barrel of the weapon is guaranteed because the holding means are sized for this purpose.
  • the barrel of the weapon is not deteriorated by the sectors and the energy of the latter after dispersion is insufficient to deteriorate the optics or to injure the servants of the weapon.
  • Such a projectile is inexpensive to produce.
  • the holding means can be constituted solely by the base itself which will then have a sufficient length to ensure the maintenance of the sectors.
  • FIGS. 2a and 2b show a second embodiment in which the holding means comprise a sleeve 14 made of a plastic material of the heat-shrinkable type. Such a material is known to those skilled in the art. It is thus possible to set up a sleeve with a diameter greater than that of the body 2, then to heat this sleeve to reduce its diameter so that it comes to bear tightly on the body 2.
  • Figures 3a and 3b show a third embodiment in which the holding means comprise a cap 15 made of plastic (for example of the same type as that constituting the body).
  • the cap 15 completely surrounds the front part of the projectile. It has at its rear part a bead 16 which enters an annular groove 17 arranged on the sectors 3. The bead ensures the fixing of the cap 15 on the sectors constituting the projectile body.
  • the cap is assembled by elastic deformation of the latter.
  • the thickness of the cap will be defined as a function of the resistance desired for the connecting means. It will be possible in particular to provide incipient fractures on the cap, for example longitudinal thinning regularly distributed angularly.
  • the cap is a connecting means making it possible to provide mechanical resistance to environmental stresses which is better than that of the welding point described above.
  • the cap also has the advantage of preventing humidity or dust from entering between the sectors.
  • FIGS. 4a and 4b show a fourth embodiment in which the holding means comprise on the one hand a cover 15 made of plastic material and on the other hand projections 18, integral with the different sectors and which cooperate with grooves 19 arranged on the sectors.
  • the grooves 19 have a shape complementary to those of the projections 18.
  • the cap is identical to that described with reference to Figures 3a and 3b and will not be described in more detail.
  • Each sector 3 carries a groove 19 on one of its intersecting planes 4a and a projection 18 on the other intersecting plane 4b.
  • Grooves and projections extend substantially over the entire length of each sector as can be seen in FIG. 4a.
  • Figures 5a and 5b show a fifth embodiment in which the holding means comprise on the one hand a cap 15 (identical to that described with reference to Figures 3a and 3b) and on the other hand a central area 20 which is formed in one piece with the three sectors 3a, 3c and 3e and which extends over substantially the entire length of the latter.
  • the first group of sectors delimits housings 21 in which the sectors 3b, 3d and 3f are arranged (which constitute what will be called hereinafter the second group of sectors).
  • the cap allows the first and second group of sectors to be joined together.
  • FIGS. 6a and 6b show a sixth embodiment similar to the previous one but in which the second group of sectors (which is made up of sectors 3b, 3d and 3f) is formed in one piece with the cover 15.
  • the first group of sectors consisting of sectors 3a, 3c and 3e connected by the central area 20, is therefore housed inside the cover 15 which carries the second group of sectors.
  • connection means will be modulated by varying the dimensions of the central zone 20 and the thickness of the cap 15 opposite the first group of sectors.
  • Figures 7a and 7b show a seventh embodiment of a projectile according to the invention.
  • This embodiment is a variant of the mode described with reference to Figures 1a and 1b.
  • the body 2 of the projectile 1 is further formed by the assembly of six identical sectors 3a, 3b, 3c, 3d, 3e and 3f.
  • the sectors are all joined at their tapered ends by a plastic connection 22 obtained by molding with the sectors.
  • the sectors are also welded two by two along the external contact edges 23 of the intersecting planes 4a, 4b.
  • These longitudinal welds 24 extend along the body 2 of the projectile from its front part 13 to the annular bulge 7 of the base 5. They are obtained by heating the body 2 along the external contact edges 23 of the secant planes 4a, 4b.
  • the welds 24 also extend radially over a certain thickness towards the inside of the projectile.
  • a base 5 receives the sectors 3 in a housing 6.
  • This variant has the advantage of ensuring good mechanical strength of the assembly of the sectors during transport or loading phases of the weapon.
  • FIG. 8 schematizes the different stages of a method of manufacturing the projectile according to this latter embodiment.
  • step A all the sectors intended to form the projectile body are produced (step A), by a single molding operation in a suitable mold not shown.
  • step B The sectors are then grouped together (step B) so as to constitute the projectile body 2.
  • a front zone 2a of the body 2 is placed inside a tool 26 intended to heat its external surface (step C).
  • the tool 26 comprises for this purpose a housing of shape complementary to that of the front zone 2a of the projectile body, thus the heat is imparted uniformly over the entire external surface of the front zone 2a.
  • the tool 26 is defined so as to bring the front zone 2a to a temperature sufficient to locally melt the material of the sectors, which makes it possible to weld them along their edges of external contact 23.
  • heating tool 26 we could for example use an electric oven connected to an energy source 25.
  • a person skilled in the art will choose the welding temperature and the duration for which the projectile body is maintained at this temperature depending, on the one hand, on the characteristics of the thermoplastic material used. and on the other hand the thickness desired for the welds 24 (therefore the mechanical strength of the connecting means).
  • the thickness of the weld increases with the duration during which the projectile body is maintained at the temperature considered.
  • step D1 After the body 2 has cooled, it is removed from the tool 26 (step D1).
  • the sketch D1 no longer represents the separations between sectors on the projectile body, the welds 24 in fact give the front part 2a of the body a smooth external surface.
  • a base 5 is also produced by molding (step D2).
  • step E the projectile body 2 and the base 5 are assembled.
  • This manufacturing process is particularly economical and suitable for mass production of the projectiles according to the invention.
EP94401117A 1993-05-25 1994-05-19 Übungsgeschloss und Verfahren zur Herstellung Expired - Lifetime EP0626555B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9306183A FR2705772B1 (fr) 1993-05-25 1993-05-25 Projectile d'exercice.
FR9306183 1993-05-25

Publications (2)

Publication Number Publication Date
EP0626555A1 true EP0626555A1 (de) 1994-11-30
EP0626555B1 EP0626555B1 (de) 1996-03-13

Family

ID=9447388

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94401117A Expired - Lifetime EP0626555B1 (de) 1993-05-25 1994-05-19 Übungsgeschloss und Verfahren zur Herstellung

Country Status (7)

Country Link
US (1) US5505137A (de)
EP (1) EP0626555B1 (de)
DE (1) DE69400093T2 (de)
ES (1) ES2086989T3 (de)
FR (1) FR2705772B1 (de)
GR (1) GR3019807T3 (de)
SG (1) SG43301A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014018144A3 (en) * 2012-05-22 2014-03-20 Aerolung Corp Longitudinally sectioned firearms projectiles
CN109141129A (zh) * 2018-09-17 2019-01-04 北京机械设备研究所 一种用于弹体热缩的加工处理装置
US10670379B2 (en) 2012-05-22 2020-06-02 Darren Rubin Longitudinally sectioned firearms projectiles
RU2754907C2 (ru) * 2015-12-16 2021-09-08 Руаг Аммотек Аг Усовершенствованный осколочный снаряд и способ его изготовления

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5932836A (en) * 1997-09-09 1999-08-03 Primex Technologies, Inc. Range limited projectile using augmented roll damping
EP1209437B1 (de) * 2000-11-23 2004-03-10 Oerlikon Contraves Pyrotec AG Treibspiegel-Geschoss mit Zerschell-Penetrator
AT412510B (de) * 2001-09-19 2005-03-25 Oregon Ets Patentverwertung Geschoss
US7845281B2 (en) * 2006-01-23 2010-12-07 Richard Frank Sexton Gun firing method for the simultaneous dispersion of projectiles in a pattern
JP5645111B2 (ja) * 2010-09-08 2014-12-24 正芳 鈴木 弾丸
US9103640B2 (en) 2010-11-09 2015-08-11 Richard F. Sexton Method for the simultaneous dispersion of projectiles
US9921040B2 (en) * 2012-05-22 2018-03-20 Darren Rubin Longitudinally sectioned firearms projectiles
US9212876B1 (en) * 2013-08-30 2015-12-15 The United States Of America As Represented By The Secretary Of The Army Large caliber frangible projectile
US20160018200A1 (en) * 2014-05-02 2016-01-21 Andrey Sharudenko Bullet with separable elements
LU92734B1 (fr) * 2015-06-05 2016-12-06 Securinov Sa Projectile cinétique à haute déformation élastique
US10036619B2 (en) * 2016-01-11 2018-07-31 Lehigh Defense, LLC Armor-piercing cavitation projectile

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE734429C (de) * 1939-07-20 1943-04-15 Ing Bohdan Pantoflicek UEbungsgeschoss mit verkuerzter Flugbahn
US3338167A (en) * 1962-03-17 1967-08-29 Karlsruhe Augsburg Iweka Disintegrating training ammunition for firearms
CH445341A (de) * 1964-12-03 1967-10-15 Karlsruhe Augsburg Iweka Zerfallgeschoss
GB1157555A (en) * 1966-09-29 1969-07-09 Rheinmetall Gmbh Improvements in or relating to Target Practice Rounds.
DE2639884A1 (de) * 1976-09-04 1978-03-09 Dynamit Nobel Ag Geschoss fuer uebungsmunition
FR2509457A1 (fr) * 1977-08-12 1983-01-14 Dynamit Nobel Ag Projectile a trajectoire courte
DE3819251A1 (de) * 1988-06-06 1989-12-07 Schirnecker Hans Ludwig Vielfachgeschoss

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA799185A (en) * 1968-11-19 Niemann Rudolf Disintegrating projectile
US221249A (en) * 1879-11-04 Improvement in projectiles for small-arms
US3785293A (en) * 1970-12-31 1974-01-15 Aai Corp Practice ammunition
US4140061A (en) * 1977-06-06 1979-02-20 The United States Of America As Represented By The Secretary Of The Army Short-range discarding-sabot training practice round and self-destruct subprojectile therefor
DE2756420C2 (de) * 1977-12-17 1985-02-07 Rheinmetall GmbH, 4000 Düsseldorf Geschoß mit selbsttätiger Zerlegerwirkung
DE3116175C2 (de) * 1981-04-23 1984-09-13 Heckler & Koch Gmbh, 7238 Oberndorf Nichttödliches Wuchtgeschoß
US4535698A (en) * 1983-11-04 1985-08-20 The United States Of America As Represented By The Secretary Of The Army Pyrotechnic nose cap for practice munitions
DE3803369C2 (de) * 1988-02-05 1994-01-05 Rheinmetall Gmbh Drallstabilisiertes Übungsgeschoß
USH770H (en) * 1989-08-11 1990-04-03 The United States Of America As Represented By The Secretary Of The Army Tracer training projectile
US5097767A (en) * 1990-10-22 1992-03-24 James Cirillo Cartridge guide nose

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE734429C (de) * 1939-07-20 1943-04-15 Ing Bohdan Pantoflicek UEbungsgeschoss mit verkuerzter Flugbahn
US3338167A (en) * 1962-03-17 1967-08-29 Karlsruhe Augsburg Iweka Disintegrating training ammunition for firearms
CH445341A (de) * 1964-12-03 1967-10-15 Karlsruhe Augsburg Iweka Zerfallgeschoss
GB1157555A (en) * 1966-09-29 1969-07-09 Rheinmetall Gmbh Improvements in or relating to Target Practice Rounds.
DE2639884A1 (de) * 1976-09-04 1978-03-09 Dynamit Nobel Ag Geschoss fuer uebungsmunition
FR2509457A1 (fr) * 1977-08-12 1983-01-14 Dynamit Nobel Ag Projectile a trajectoire courte
DE3819251A1 (de) * 1988-06-06 1989-12-07 Schirnecker Hans Ludwig Vielfachgeschoss

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014018144A3 (en) * 2012-05-22 2014-03-20 Aerolung Corp Longitudinally sectioned firearms projectiles
US10670379B2 (en) 2012-05-22 2020-06-02 Darren Rubin Longitudinally sectioned firearms projectiles
RU2754907C2 (ru) * 2015-12-16 2021-09-08 Руаг Аммотек Аг Усовершенствованный осколочный снаряд и способ его изготовления
CN109141129A (zh) * 2018-09-17 2019-01-04 北京机械设备研究所 一种用于弹体热缩的加工处理装置
CN109141129B (zh) * 2018-09-17 2020-06-16 北京机械设备研究所 一种用于弹体热缩的加工处理装置

Also Published As

Publication number Publication date
FR2705772B1 (fr) 1995-08-11
GR3019807T3 (en) 1996-07-31
DE69400093T2 (de) 1996-07-25
DE69400093D1 (de) 1996-04-18
EP0626555B1 (de) 1996-03-13
SG43301A1 (en) 1997-10-17
ES2086989T3 (es) 1996-07-01
FR2705772A1 (fr) 1994-12-02
US5505137A (en) 1996-04-09

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