EP0435830B1 - Procédé pour la fabrication de douilles de cartouches pour armes à feu et douille ainsi obtenue - Google Patents

Procédé pour la fabrication de douilles de cartouches pour armes à feu et douille ainsi obtenue Download PDF

Info

Publication number
EP0435830B1
EP0435830B1 EP90830153A EP90830153A EP0435830B1 EP 0435830 B1 EP0435830 B1 EP 0435830B1 EP 90830153 A EP90830153 A EP 90830153A EP 90830153 A EP90830153 A EP 90830153A EP 0435830 B1 EP0435830 B1 EP 0435830B1
Authority
EP
European Patent Office
Prior art keywords
tube
reinforcing piece
cap
ring
tooth
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
EP90830153A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0435830A1 (fr
Inventor
Jensen Mette
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.)
Gordon Consulting Engineering & Marketing Ltd
Original Assignee
Gordon Consulting Engineering & Marketing Ltd
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 Gordon Consulting Engineering & Marketing Ltd filed Critical Gordon Consulting Engineering & Marketing Ltd
Priority to AT90830153T priority Critical patent/ATE99044T1/de
Publication of EP0435830A1 publication Critical patent/EP0435830A1/fr
Application granted granted Critical
Publication of EP0435830B1 publication Critical patent/EP0435830B1/fr
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
    • 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
    • F42B5/307—Cartridge cases of plastics, i.e. the cartridge-case tube is of plastics formed by assembling several elements

Definitions

  • the present invention relates to a method for manufacturing cartridge cases for firearms of the three-element type, and to the case thus obtained.
  • the base has a cylindrical shape, is essentially closed at one of its ends and has, along the perimeter edge of this end, a bulge or collar defining inside the base a notch acting as a housing.
  • the base also provides a central hole in which a capsule is introduced for igniting the powder.
  • the tube is cylindrical and intended to be introduced into the base at least until it contacts the closed end of the latter. The tube could indeed have its peripheral end edge folded towards the axis of the tube itself for a reason which will be clarified later.
  • the reinforcement piece is also cylindrical on the outside and is provided with a central hole which must be coaxial with the hole in the base to accommodate the capsule therein.
  • the room reinforcement is likewise formed of deformable material, for a reason which will appear obvious from the description of the process carried out here.
  • the reinforcement piece is introduced into one end of the tube and this end is introduced into the base at least until when it is in contact with the closed base of said base. If the tube has a folded edge as said above, the reinforcement piece is inserted into the tube and brought into contact with this folded edge. Then, after having correctly positioned the three elements and having properly retained them, a compression action is exerted on the reinforcement piece which, through this forcing operation, must fulfill two fundamental functions. The first is that of clamping the tube against the interior surface of the base and the second is that of radially deforming the end of the tube so as to force it into the housing defined by the collar of the base.
  • the same working step also aims to ensure that the base of the socket, where the capsule is located and which consists of the reinforcement piece and the base, offers rigid resistance to the striker when the latter strikes the primer or capsule.
  • the rigidity and resistance characteristics can be ensured only by the impossibility of relative slippages between the elements and must be calculated very precisely in order to avoid anomalous ignitions or the non-ignition of the primer and therefore of the powder. .
  • Another object of the invention which must be achieved by the same working step is that of eliminating or minimizing the losses of combustion gases which tend to occur between the tube and the reinforcement piece and which, by the deformation of the base, modify the dimensional structure of the socket.
  • the object of the present invention is therefore to enable the manufacture of cartridge cases, of the "three-element" type, for firearms, for which it is possible, during any discharge step, to maintain the junction between said three elements without requiring the intervention of considerable compressive forces which during the assembly step of the sleeve could deform one or more elements forming the sleeve and modify the geometry thereof.
  • Another object of the invention is to allow the manufacture of the sockets in a simple, rational and economical manner, by eliminating the drawbacks mentioned above.
  • the method according to the invention makes it possible to manufacture sockets, generally indicated in 1, composed of three elements, that is to say a cylindrical tube 2, a reinforcement piece 3 to be inserted in the tube 2 and a base 4.
  • the reinforcing piece 3 is made of a material which is substantially non-deformable and that it is already shaped so as to have at least one perimeter end tooth 31 projecting from the reinforcing piece.
  • the perimeter tooth 31 has an outside diameter of maximum overall dimensions 3d larger than the outside diameter 2d of the tube 2 and it is tapered towards the cylindrical perimeter surface of the reinforcement piece 3.
  • non-deformable should not be taken in an absolute sense, but it only means that the reinforcement piece 3 does not undergo significant deformations during all the steps of the process according to the invention.
  • the method according to the invention provides that the base 4 is also suitably shaped and that it is formed of two portions 41 and 42 coaxial and of different internal diameters, 41d and 42d respectively.
  • the smaller diameter 41d is essentially equal to the outside diameter 2d of the tube 2 while the larger diameter 42d is essentially equal to the maximum diameter 3d of the perimeter tooth 31 of the reinforcement piece 3.
  • the connecting portion 43 portions 41 and 42 constitute for the base 4 a tapered collar of nanometer corresponding to the perimeter tooth 31 and defining, inside the collar 43, a housing indicated in 45 of dimensions sufficient to receive both the perimeter tooth 31 and the one end of the tube 2.
  • the length 1 of the end 21 of the tube 2 can vary from the minimum value described, which allows the use of a reinforcement piece 3 whose perimeter tooth 31 is inserted directly in contact with the interior wall of the portion 42 of the base 4 (see Figure 4), up to a value greater than the axial dimension of the tooth 31 measured parallel to its generatrix, so that the end 21 of the tube 2 extends towards the portion 42 of the base 4 au- beyond the perimeter tooth 31 (see Figure 5).
  • the diameter 3d of the perimeter tooth 31 must be substantially equal to the diameter 42d of the portion 42 of the base 4 minus twice the thickness s of the tube 2.
  • the method according to the present invention provides for using already shaped elements and assembling them by joining them together, by means of the exploitation of their conformation which remains unchanged during all the stages of assembly.
  • the maintenance of the connection between the tube 2, the reinforcement piece 3 and the base 4 is ensured by geometric shapes which are perfectly visible and which can be checked before the assembly step and which remain unchanged during the same step.
  • a socket 1 obtained by implementing the method of the invention and illustrated in FIG. 4, we can already notice that it consists of a tube 2 surrounded by a base 4 with open bases and by a reinforcement piece 3 inserted inside the tube 2 and shaped so as to have, at one of its ends, a perimeter tooth 31 projecting from the piece 3 itself.
  • the reinforcement piece 3 does not undergo a significant deformation during the assembly step, it can be given the geometrical conformation which allows the socket 1 the best functioning and the best ballistic performance.
  • the part 38 of the reinforcing part 3 intended to come into contact with the powder can also be provided with reliefs 33 arranged along the periphery of an axial hole 32 formed in the reinforcement part 3 for housing a capsule 5 for igniting the powder.
  • the reliefs 33 have the task of preventing the powder 6 which will be introduced and compressed in the hollow 38 from being able to smother the flame of the capsule 5 housed in the respective hole 32.
  • the reliefs 33 for example in the form of strips extending along radial directions of the hole 32, serve to increase the flame front for the capsule 5.
  • the axial hole 32 of the reinforcement piece 3 can be produced in different ways in order to allow the accommodation inside of it of different types of capsules 5: for example, a rigid element 34 can be provided inside the hole 32 forming an anvil for a capsule of known type called "Berdan" (see Figure 7).
  • the reinforcement piece 3 can have a perimeter groove 35 outside. Between the groove 35 and the hollow 38 there is the interposition of a partition 37 which can bend under the push of the powder during of the shot.
  • a partition 37 which can bend under the push of the powder during of the shot.
  • the wall 37 does not undergo any deformation during the stages of assembly of the three elements forming the bush 1 and under the action of the forces at play during these stages, but it undergoes a deformation, which on the other hand is expected, after these stages and when it is subjected to forces much higher in absolute value than those exerted during the stages of the process according to the invention.
  • the reinforcing part 3 is in fact provided, on the side on which the edge of the portion 42 forming part of the base 4 is provided for, relief means 36 obtained from different ways, for example through blind holes. This is made possible by the fact that the reinforcing part does not undergo any considerable deformation during the assembly steps of the sleeve 1 and therefore, since its conformation does not undergo any change, it can be provided in any shape. provided it has the perimeter tooth 31.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Glass Compositions (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Automatic Tape Cassette Changers (AREA)
  • Dry Development In Electrophotography (AREA)
  • Powder Metallurgy (AREA)
  • Saccharide Compounds (AREA)
  • Prostheses (AREA)
  • Radiation-Therapy Devices (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Fire-Extinguishing Compositions (AREA)
EP90830153A 1989-12-22 1990-04-06 Procédé pour la fabrication de douilles de cartouches pour armes à feu et douille ainsi obtenue Expired - Lifetime EP0435830B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90830153T ATE99044T1 (de) 1989-12-22 1990-04-06 Verfahren zur herstellung von patronenhuelsen fuer feuerwaffen und damit erzeugte huelsen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT3784A IT1235986B (it) 1989-12-22 1989-12-22 Metodo per la realizzazione di bossoli per armi da fuoco e bossolo cosi' ottenuto
IT378489 1989-12-22

Publications (2)

Publication Number Publication Date
EP0435830A1 EP0435830A1 (fr) 1991-07-03
EP0435830B1 true EP0435830B1 (fr) 1993-12-22

Family

ID=11111702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90830153A Expired - Lifetime EP0435830B1 (fr) 1989-12-22 1990-04-06 Procédé pour la fabrication de douilles de cartouches pour armes à feu et douille ainsi obtenue

Country Status (11)

Country Link
EP (1) EP0435830B1 (it)
CN (1) CN1023512C (it)
AT (1) ATE99044T1 (it)
AU (1) AU635990B2 (it)
BR (1) BR9006561A (it)
CA (1) CA2013981C (it)
DE (1) DE69005432T2 (it)
ES (1) ES2047306T3 (it)
IT (1) IT1235986B (it)
RU (1) RU2069302C1 (it)
YU (1) YU241390A (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12066279B2 (en) 2022-05-06 2024-08-20 Innovative Performance Applications, Llc Polymer ammunition casing

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5710391A (en) * 1993-10-12 1998-01-20 Chetcuti; Francis Recoil reducer wad for ammunition
AU7094598A (en) 1997-04-21 1998-11-13 Tomscot Hb Shotgun cartridge case-sleeve and a cartridge made therefrom
US6164209A (en) * 1998-12-21 2000-12-26 Olin Corporation Shotshell basewad
RU2197703C2 (ru) * 2001-04-02 2003-01-27 Федеральное государственное предприятие Новосибирский механический завод "Искра" Бумажная сборная гильза для патронов к гладкоствольным ружьям
RU2184338C1 (ru) * 2001-05-17 2002-06-27 Хвичия Эдуард Илларионович Пластмассовая патронная гильза и устройство для ее изготовления
RU2204794C2 (ru) * 2001-07-04 2003-05-20 Кашкаров Глеб Геннадьевич Патронная гильза
FR2926133B1 (fr) * 2008-01-09 2010-01-22 France Cheddite Procede de fabrication de cylindres pour douille de cartouche et composition.
DE102008034660B4 (de) 2008-07-25 2012-03-08 Rheinmetall Waffe Munition Gmbh Patronenmunition

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191202430A (en) * 1912-01-26 1912-12-05 James Yate Johnson Improvements in Aluminium Catridge Cases.
FR1430385A (fr) * 1965-01-22 1966-03-04 Gevelot Sa Procédé de fabrication de cartouches, et cartouches obtenues par ce procédé
GB1152193A (en) * 1965-07-23 1969-05-14 Fiocchi Spa Giulio Sporting Cartridge Case
DE1578223A1 (de) * 1966-09-21 1971-11-25 Fiocchi Spa Giulio Patronenhuelse fuer Schrotflinten
FR1553453A (it) * 1967-02-27 1969-01-10
US3565008A (en) * 1968-06-26 1971-02-23 Olin Mathieson Plastic shotshell and method
US3675576A (en) * 1970-02-18 1972-07-11 Colorado Business Dev Corp Reloadable two-piece shotgun cartridge
US4867066A (en) * 1988-10-21 1989-09-19 Olin Corporation Shotshell casing with reduced volume basewad and increased interior volume for larger shot loads

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12066279B2 (en) 2022-05-06 2024-08-20 Innovative Performance Applications, Llc Polymer ammunition casing

Also Published As

Publication number Publication date
CN1054131A (zh) 1991-08-28
ES2047306T3 (es) 1994-02-16
IT1235986B (it) 1992-12-15
IT8903784A0 (it) 1989-12-22
CA2013981A1 (en) 1991-06-22
AU6825690A (en) 1991-06-27
BR9006561A (pt) 1991-10-01
DE69005432T2 (de) 1994-04-14
AU635990B2 (en) 1993-04-08
ATE99044T1 (de) 1994-01-15
EP0435830A1 (fr) 1991-07-03
DE69005432D1 (de) 1994-02-03
CN1023512C (zh) 1994-01-12
RU2069302C1 (ru) 1996-11-20
CA2013981C (en) 1999-08-24
YU241390A (sh) 1994-11-15

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