EP0435830A1 - Verfahren zur Herstellung von Patronenhülsen für Feuerwaffen und damit erzeugte Hülsen - Google Patents
Verfahren zur Herstellung von Patronenhülsen für Feuerwaffen und damit erzeugte Hülsen Download PDFInfo
- Publication number
- EP0435830A1 EP0435830A1 EP90830153A EP90830153A EP0435830A1 EP 0435830 A1 EP0435830 A1 EP 0435830A1 EP 90830153 A EP90830153 A EP 90830153A EP 90830153 A EP90830153 A EP 90830153A EP 0435830 A1 EP0435830 A1 EP 0435830A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- base
- reinforcement piece
- collar
- piece
- 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
Links
Images
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 most widely followed manufacturing method for manufacturing "three-element" type sockets involves the use of a plastic or paper tube, a cylindrical reinforcement piece also of plastic or paper and d 'a metal base.
- 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 present invention therefore aims to allow the manufacture of cartridge cases, of the "three-element" type, for firearms, for which it is possible to ensure, during any unloading step, the maintenance of 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, 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 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 steps 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)
- Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Glass Compositions (AREA)
- Saccharide Compounds (AREA)
- Prostheses (AREA)
- Powder Metallurgy (AREA)
- Automatic Tape Cassette Changers (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Dry Development In Electrophotography (AREA)
- Radiation-Therapy Devices (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Fire-Extinguishing Compositions (AREA)
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 |
---|---|---|---|
IT378489 | 1989-12-22 | ||
IT3784A IT1235986B (it) | 1989-12-22 | 1989-12-22 | Metodo per la realizzazione di bossoli per armi da fuoco e bossolo cosi' ottenuto |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0435830A1 true EP0435830A1 (de) | 1991-07-03 |
EP0435830B1 EP0435830B1 (de) | 1993-12-22 |
Family
ID=11111702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90830153A Expired - Lifetime EP0435830B1 (de) | 1989-12-22 | 1990-04-06 | Verfahren zur Herstellung von Patronenhülsen für Feuerwaffen und damit erzeugte Hülsen |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0435830B1 (de) |
CN (1) | CN1023512C (de) |
AT (1) | ATE99044T1 (de) |
AU (1) | AU635990B2 (de) |
BR (1) | BR9006561A (de) |
CA (1) | CA2013981C (de) |
DE (1) | DE69005432T2 (de) |
ES (1) | ES2047306T3 (de) |
IT (1) | IT1235986B (de) |
RU (1) | RU2069302C1 (de) |
YU (1) | YU241390A (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5710391A (en) * | 1993-10-12 | 1998-01-20 | Chetcuti; Francis | Recoil reducer wad for ammunition |
WO1998048238A1 (en) * | 1997-04-21 | 1998-10-29 | Tomscot Hb | Shotgun cartridge case-sleeve and a cartridge made therefrom |
WO2010009723A1 (de) * | 2008-07-25 | 2010-01-28 | Rheinmetall Waffe Munition Gmbh | Patronenmunition |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6164209A (en) * | 1998-12-21 | 2000-12-26 | Olin Corporation | Shotshell basewad |
FR2926133B1 (fr) * | 2008-01-09 | 2010-01-22 | France Cheddite | Procede de fabrication de cylindres pour douille de cartouche et composition. |
US12066279B2 (en) | 2022-05-06 | 2024-08-20 | Innovative Performance Applications, Llc | Polymer ammunition casing |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR454548A (fr) * | 1912-01-26 | 1913-07-07 | Wiesbadener Staniol-Und Metallkapsel-Fabrik A Flac | Douille de cartouche en aluminium |
FR1430385A (fr) * | 1965-01-22 | 1966-03-04 | Gevelot Sa | Procédé de fabrication de cartouches, et cartouches obtenues par ce procédé |
BE704039A (de) * | 1966-09-21 | 1968-02-01 | ||
FR1553453A (de) * | 1967-02-27 | 1969-01-10 | ||
FR2011986A1 (de) * | 1968-06-26 | 1970-03-13 | Olin Mathieson | |
US3675576A (en) * | 1970-02-18 | 1972-07-11 | Colorado Business Dev Corp | Reloadable two-piece shotgun cartridge |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1152193A (en) * | 1965-07-23 | 1969-05-14 | Fiocchi Spa Giulio | Sporting Cartridge Case |
US4867066A (en) * | 1988-10-21 | 1989-09-19 | Olin Corporation | Shotshell casing with reduced volume basewad and increased interior volume for larger shot loads |
-
1989
- 1989-12-22 IT IT3784A patent/IT1235986B/it active IP Right Grant
-
1990
- 1990-04-05 CA CA002013981A patent/CA2013981C/en not_active Expired - Fee Related
- 1990-04-06 AT AT90830153T patent/ATE99044T1/de not_active IP Right Cessation
- 1990-04-06 EP EP90830153A patent/EP0435830B1/de not_active Expired - Lifetime
- 1990-04-06 DE DE90830153T patent/DE69005432T2/de not_active Expired - Fee Related
- 1990-04-06 ES ES90830153T patent/ES2047306T3/es not_active Expired - Lifetime
- 1990-12-19 AU AU68256/90A patent/AU635990B2/en not_active Ceased
- 1990-12-21 RU SU904894136A patent/RU2069302C1/ru active
- 1990-12-21 CN CN91100743A patent/CN1023512C/zh not_active Expired - Lifetime
- 1990-12-21 BR BR909006561A patent/BR9006561A/pt not_active IP Right Cessation
- 1990-12-21 YU YU241390A patent/YU241390A/sh unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR454548A (fr) * | 1912-01-26 | 1913-07-07 | Wiesbadener Staniol-Und Metallkapsel-Fabrik A Flac | Douille de cartouche en aluminium |
FR1430385A (fr) * | 1965-01-22 | 1966-03-04 | Gevelot Sa | Procédé de fabrication de cartouches, et cartouches obtenues par ce procédé |
BE704039A (de) * | 1966-09-21 | 1968-02-01 | ||
FR1553453A (de) * | 1967-02-27 | 1969-01-10 | ||
FR2011986A1 (de) * | 1968-06-26 | 1970-03-13 | Olin Mathieson | |
US3675576A (en) * | 1970-02-18 | 1972-07-11 | Colorado Business Dev Corp | Reloadable two-piece shotgun cartridge |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5710391A (en) * | 1993-10-12 | 1998-01-20 | Chetcuti; Francis | Recoil reducer wad for ammunition |
WO1998048238A1 (en) * | 1997-04-21 | 1998-10-29 | Tomscot Hb | Shotgun cartridge case-sleeve and a cartridge made therefrom |
US6305291B1 (en) | 1997-04-21 | 2001-10-23 | Tomscot Hb | Shotgun cartridge case-sleeve and a cartridge made therefrom |
WO2010009723A1 (de) * | 2008-07-25 | 2010-01-28 | Rheinmetall Waffe Munition Gmbh | Patronenmunition |
US8418621B2 (en) | 2008-07-25 | 2013-04-16 | Rheinmetall Waffe Munition Gmbh | Cartridge ammunition |
Also Published As
Publication number | Publication date |
---|---|
EP0435830B1 (de) | 1993-12-22 |
CN1054131A (zh) | 1991-08-28 |
AU6825690A (en) | 1991-06-27 |
CN1023512C (zh) | 1994-01-12 |
ATE99044T1 (de) | 1994-01-15 |
RU2069302C1 (ru) | 1996-11-20 |
YU241390A (sh) | 1994-11-15 |
CA2013981A1 (en) | 1991-06-22 |
IT1235986B (it) | 1992-12-15 |
AU635990B2 (en) | 1993-04-08 |
ES2047306T3 (es) | 1994-02-16 |
CA2013981C (en) | 1999-08-24 |
BR9006561A (pt) | 1991-10-01 |
IT8903784A0 (it) | 1989-12-22 |
DE69005432D1 (de) | 1994-02-03 |
DE69005432T2 (de) | 1994-04-14 |
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