EP0147314B1 - Kunststoffbodenkörper - Google Patents

Kunststoffbodenkörper Download PDF

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Publication number
EP0147314B1
EP0147314B1 EP84402665A EP84402665A EP0147314B1 EP 0147314 B1 EP0147314 B1 EP 0147314B1 EP 84402665 A EP84402665 A EP 84402665A EP 84402665 A EP84402665 A EP 84402665A EP 0147314 B1 EP0147314 B1 EP 0147314B1
Authority
EP
European Patent Office
Prior art keywords
base
case
ammunition
tubular portion
obturator
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
Application number
EP84402665A
Other languages
English (en)
French (fr)
Other versions
EP0147314A2 (de
EP0147314A3 (en
Inventor
Pierre Moreau
Jean Claude Sauvestre
Patrick Montier
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
Delegation Generale pour lArmement
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9295427&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0147314(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Giat Industries SA, Delegation Generale pour lArmement filed Critical Giat Industries SA
Priority to AT84402665T priority Critical patent/ATE34837T1/de
Publication of EP0147314A2 publication Critical patent/EP0147314A2/de
Publication of EP0147314A3 publication Critical patent/EP0147314A3/fr
Application granted granted Critical
Publication of EP0147314B1 publication Critical patent/EP0147314B1/de
Expired 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
    • F42B5/26—Cartridge cases
    • F42B5/30—Cartridge cases of plastics, i.e. the cartridge-case tube is of plastics

Definitions

  • the technical sector of the present invention is that of medium or large caliber ammunition, and more precisely ammunition casings.
  • the metal sleeve constitutes a reservoir of harmful gases which it carries into the turret after ejection.
  • the shutter base As for the shutter base, it also has two specific drawbacks. In fact, it has been found that the metal obturating caps have a poor seal at low pressure level, which requires the provision of additional sealing devices to obtain inside the socket sufficient pressure for the proper functioning of the ammunition. .
  • patent FR-A-2 365 096 presents, for a metal base, a rubber or silicone seal fitted on an annular bead of the base.
  • the patent FR-A-2 380 531 shows a seal having a lip making it possible to use the gas streams by converting them into a radial pressure ensuring the seal.
  • Patent FR-A-2 218 547 shows a base for a fuel socket ensuring a sealing function with respect to the wall of the barrel by means of rubber seals which are expandable under the effect of the gas pressure which is established at the inside of the socket.
  • FR-A-328 008 describes a cartridge for reusable small caliber ammunition.
  • the seal is ensured by the expansion of the case and not by the bevel of the base shown which is intended only to facilitate the introduction of the case.
  • US-A-2,564,695 describes the manufacture of a plastic sleeve to overcome the known drawbacks of paper cartridges, in order to increase their strength and rigidity.
  • the plastic case and plastic base connection is made by pressure in the absence of any bevel at the base or shoe.
  • the object of the present invention is to overcome the aforementioned drawbacks by producing obturating caps of reduced mass correctly ensuring a sealing function at low pressure level, that is to say between 0 and 15 ⁇ 10 5 Pa, without device. annex or with a very clearly simplified device, using for this purpose the deformation capacities of the material used.
  • Another object of the invention is to provide a particular embodiment of the shutter base made of non-metallic material for large caliber ammunition, making it possible to guarantee sealing in the range of pressure levels used in ammunition of medium or large caliber.
  • Another object of the invention is to produce sockets or obturating caps ensuring better mechanical resistance to environmental stresses than the devices currently used.
  • Another object is to improve the connection between the shutter base and the combustible case.
  • the invention also aims to obtain reduced manufacturing costs in large series.
  • the subject of the invention is therefore a shutter cap for medium or large caliber ammunition made of a non-metallic material having a modulus of elasticity of between 1000 and 10,000 M Pascal, cap having a tubular part integral with the combustible case of the ammunition, the case being engaged in the tubular part, and a circular rear flange carrying an axial bore intended for the installation of a primer holder tube; such a device is part of the state of the art.
  • the base according to the invention is characterized in that the section of the front of the tubular outlet comprises a bevel from the inside to the outside, without contact with the external surface of the case, the bevel being applied to the wall of the barrel of the weapon by deformation after combustion of the holster, to ensure the tightness of the ammunition at low pressure level.
  • the base comprises between the tubular part and the case a foam gasket loaded with combustible material.
  • the base has a metal insert comprising a rear pellet and a tubular part of small section.
  • the non-metallic material of the base is overmolded on the metallic insert.
  • the non-metallic material of the base is charged with a material conducting the current electrical, to ensure the electrical connection between the electrical primer and the shutter base.
  • the base according to the invention comprises a tubular part 1 intended to allow the base to be secured to the case of the ammunition and to carry out the sealing function fulfilled by the invention, and a circular rear flange 2 comprising a shoulder 3 intended to come to bear on the rear of the barrel of the weapon.
  • the flange 2 has in its center a threaded axial bore 4 intended for the installation of a primer holder tube of conventional type.
  • the base is made of a non-metallic material having a modulus of elasticity of between 1000 MPascal and 10000 MPascal.
  • the base can thus be made of a plastic material such as polyester, polyvinyl chloride or polyethylene.
  • the section of the tubular part 1 decreases from the flange 2 to its free front end and ends with a bevel 5 made from the inside towards the outside, this arrangement allowing a radial deformation towards the outside under the effect of the removal without the shell of the ammunition during firing in order to ensure the tightness of the ammunition at low pressure level.
  • FIG. 3 shows an alternative embodiment according to which the shutter base made of non-metallic material comprises a metal insert intended to obtain good mechanical strength of the base and to control the radial elastic deformation of the latter during firing.
  • This insert comprises a rear pellet 6 with a diameter slightly greater than the caliber of the ammunition so that the pellet 6 projects beyond the inside of the shoulder 3 to ensure its rigidity.
  • This pellet 6 is integral with a tubular part of small section 7 which penetrates inside the tubular part 1 of the base and whose free end is located at the base of the bevel 5 of the base. Obtaining a base comprising such an insert can be achieved by molding the non-metallic material on the insert.
  • Figures 4 and 5 are shown two means of connecting the base on a possibly combustible case.
  • the case is assembled by gluing on the internal part 8 of the tubular part 1 of the base.
  • the internal part 8 has the shape of an annular bowl on which rests an annular rounding 9 of the rear part of the case 10.
  • the assembly only includes a bonding on the part internal 8 of the base and not on the bevel 5 so as not to oppose the radial deformation of the base during firing.
  • a foam 11 comprising a binder loaded with combustible material.
  • the elasticity of the foam is determined by the rate of loading of combustible material, which allows perfect control of the coupling of the base and the case.
  • such a very flexible seal 11 provides excellent sealing at a very low pressure level and disappears entirely during the combustion phase.
  • the electrical connection can be made, either by a metallic ground connection, or preferably by adding conductive material to the mass of the non-metallic material of the base.
  • the invention has the advantage of ensuring a more secure connection between the shutter base and the combustible case of the ammunition and of greatly improving the seal at very low pressure level in the gun barrel.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Laminated Bodies (AREA)
  • Gasket Seals (AREA)
  • Adornments (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Forging (AREA)

Claims (5)

1. Hülsenboden für Munitionen von mittlerem oder grossem Kaliber, in einem nichtmetallischen Werkstoff mit einem Elastizitätsmodul zwischen 1000 und 10 000 MPa hergestellt, bestehend aus einem mit der brennbaren Hülse (10) der Munition bündigen, rohrförmigen Teil (1), wobei der Hülsenkörper in den rohrförmigen Teil einragt, sowie aus einem runden, hinteren Flansch (2) mit einer axialen Bohrung (4) für die Aufnahme .eines Zündrohres, dadurch gekennzeichnet, dass der Querschnitt der vorderen Kante des rohrförmigen Teils von innen nach aussen abgefast ist, ohne mit der äusseren Fläche des Hülsenkörpers in Berührung zu kommen, wobei die abgefaste Kante, nach dem Abbrand der Hülse, durch Verformung gegen die innere Fläche des Waffenrohres gedrückt wird, um eine Abdichtung der Munition bei niedrigem Druckpegel zu gewähren.
2. Hülsenboden nach Anspruch 1, dadurch gekennzeichnet, dass er zwischen dem rohrförmigen Teil (1) und den Hülsenkörper (10) mit einer Dichtung (11) versehen ist, die aus einem mit brennbarer Füllung gegossenen Schaum besteht.
3. Hülsenboden nach einem beliebigen Anspruch 1 bis 2, dadurch gekennzeichnet, dass er mit einem metallischen Einsatz versehen ist, der aus einer hinteren Scheibe (6) und einem rohrförmigen Teil (7) von kleinem Durchschnitt besteht.
4. Hülsenboden nach Anspruch 3, dadurch gekennzeichnet, dass der nicht-metallische Werkstoff um den metallischen Einsatz (6, 7) ausgegossen wird.
5. Hülsenboden nach einem beliebigen Anspruch 1 bis 4, mit einer elektrischen Zündkapsel, dadurch gekennzeichnet, dass der nicht-metallische Werkstoff mit einer Füllung aus stromleitendem Werkstoff gemischt ist, um eine stromführende Leitung zwischen der elektrischen Zündkapsel und dem Hülsenboden herzustellen.
EP84402665A 1983-12-22 1984-12-20 Kunststoffbodenkörper Expired EP0147314B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84402665T ATE34837T1 (de) 1983-12-22 1984-12-20 Kunststoffbodenkoerper.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8320532A FR2557285B1 (fr) 1983-12-22 1983-12-22 Culot obturateur en materiau non metallique
FR8320532 1983-12-22

Publications (3)

Publication Number Publication Date
EP0147314A2 EP0147314A2 (de) 1985-07-03
EP0147314A3 EP0147314A3 (en) 1985-08-07
EP0147314B1 true EP0147314B1 (de) 1988-06-01

Family

ID=9295427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84402665A Expired EP0147314B1 (de) 1983-12-22 1984-12-20 Kunststoffbodenkörper

Country Status (6)

Country Link
EP (1) EP0147314B1 (de)
AT (1) ATE34837T1 (de)
DE (1) DE3471740D1 (de)
ES (1) ES295770Y (de)
FR (1) FR2557285B1 (de)
NO (1) NO157633C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4229559C2 (de) * 1992-09-04 2000-12-07 Rheinmetall W & M Gmbh Hülsenboden für großkalibrige Munition

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020001052A1 (de) 2020-02-19 2021-08-19 Nitrochemie Aschau Gmbh Hülsenmantel

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR328008A (fr) 1902-06-27 1903-08-28 Barrallon Antony étui de cartouche en matière plastique pour toutes armes
US2564695A (en) * 1949-01-13 1951-08-21 Jr Arthur C Johnson Plastic cartridge case and method of making same
DE1028910B (de) * 1957-06-25 1958-04-24 Ver Deutsche Metallwerke Ag Patronenhuelse aus Kunststoff
FR1294551A (fr) * 1961-07-08 1962-05-26 Ici Ltd Perfectionnements aux cartouches pour fusils de chasse
FR1442932A (fr) * 1964-08-12 1966-06-17 Mueanyagipari Ki Douilles de cartouches en matière plastique
DE1578234A1 (de) * 1965-05-05 1971-01-07 Smith And Wesson Inc Elektrisches Gewehr und dafuer geeignete Munition
FR1489207A (fr) * 1966-06-09 1967-07-21 Douille de chasse
US3429260A (en) * 1967-02-13 1969-02-25 Sidney A Corren Miniature initiator for electroexploding device
US3705549A (en) * 1970-11-25 1972-12-12 Us Army Ammunition
US3760729A (en) * 1971-12-21 1973-09-25 Us Army Hermetically sealed plastic cartridge case/cap system
DE2307907C2 (de) 1973-02-17 1983-09-01 Rheinmetall GmbH, 4000 Düsseldorf Treibladungshülse
FR2287324A1 (fr) * 1974-10-07 1976-05-07 Philippe Josette Procede de fabrication d'une cartouche de chasse
US4147107A (en) * 1976-02-17 1979-04-03 Kupag Kunststoff-Patent-Verwaltungs Ag Ammunition cartridge
DE2641665C2 (de) 1976-09-16 1984-03-01 Rheinmetall GmbH, 4000 Düsseldorf Treibladungshülse
FR2376395A1 (fr) * 1976-12-29 1978-07-28 Olivie Maitena Douille de matiere plastique pour cartouches de chasse
DE2705278C2 (de) 1977-02-09 1984-02-23 Rheinmetall GmbH, 4000 Düsseldorf Stummelhülse mit Liderung
BE859068A (fr) * 1977-09-27 1978-03-28 Herstal Sa Douille pour cartouche de chasse en matiere synthetique
AU8824682A (en) * 1981-07-06 1983-02-02 Palcher, J.J. Ammunition casing and bullet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4229559C2 (de) * 1992-09-04 2000-12-07 Rheinmetall W & M Gmbh Hülsenboden für großkalibrige Munition

Also Published As

Publication number Publication date
NO845200L (no) 1985-06-24
EP0147314A2 (de) 1985-07-03
DE3471740D1 (en) 1988-07-07
NO157633C (no) 1988-04-20
EP0147314A3 (en) 1985-08-07
ES295770Y (es) 1987-12-01
FR2557285B1 (fr) 1986-12-19
FR2557285A1 (fr) 1985-06-28
ES295770U (es) 1987-04-16
ATE34837T1 (de) 1988-06-15
NO157633B (no) 1988-01-11

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