WO2000026605A1 - Production of a low-polluting jacketed bullet - Google Patents
Production of a low-polluting jacketed bullet Download PDFInfo
- Publication number
- WO2000026605A1 WO2000026605A1 PCT/CH1999/000491 CH9900491W WO0026605A1 WO 2000026605 A1 WO2000026605 A1 WO 2000026605A1 CH 9900491 W CH9900491 W CH 9900491W WO 0026605 A1 WO0026605 A1 WO 0026605A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lubricant
- shell
- core
- projectile
- tungsten
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
- F42B12/72—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material
- F42B12/74—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material of the core or solid body
Definitions
- the present invention relates to a method for producing a low-pollutant shell projectile according to the preamble of the patent claim and to a projectile produced by this method.
- This method has the disadvantage of cost-intensive thermal process control and is therefore too expensive for ordnance ammunition. Furthermore, the density of the floor can only be set within narrow limits; in addition, the dimensional stability with temperature fluctuations is insufficient due to the high proportion of plastic in the core. It is therefore an object of the invention to provide a method which does not have the disadvantages of the prior art, can be implemented with operating devices which are present everywhere, in particular does not require any thermal processes with corresponding systems and can be adjusted in a simple manner in the resulting density.
- the projectile created by this method should have the same weight, the same outer geometry, the same inside and outside ballistics and the same penetration performance as an existing and previously mass-produced bullet (Ordonnance ammunition 5.6 mm GP90). Furthermore, the dimension of the projectile should also be maintained over a wide temperature range and - of course - all requirements of the Hague Convention must also be met by the substitute product.
- the projectile should be designed to be liquid-tight; Manufacturing tolerances should be compensated for by the construction of the floor.
- the lubricant and lubricant mentioned in the claims proves to be surprisingly inexpensive, since in the weight ratios given it leads to an optimal packing density in the tungsten core even at relatively low pressures and as such does not form a measurable intermediate layer at the contact points of the tungsten grains.
- the projectile according to the invention can be started by a the known gravimetric dosing of the tungsten powder and the lubricant and lubricant are precisely and reproducibly defined in their mass.
- a tungsten powder with the grain size specified in claim 3 can be used to achieve densities which correspond to a lead core.
- Powdered calcium stearate, intimately mixed with tungsten powder has proven to be particularly useful, which creates a one-piece body that holds together when pressed at room temperature; the substances listed alternatively in claim 4 are also suitable.
- the proportion by weight specified in claim 5 is optimal, it prevents the pre-compact from breaking apart when it is removed from the mold and when it is inserted into the shell.
- the final pressing is carried out according to claim 7 with higher pressures, preferably in the range of 400 MPa.
- the pressing pressure when pressing the core material must be above 350 MPa, preferably at 400 MPa.
- a compensating and sealing compound according to claim 9 has the advantage that a liquid-tight rear part arises, and that even small manufacturing tolerances can be compensated.
- Tin has proven itself, claim 10, because it flows easily under pressure and thus results in a completely form-fitting projectile body.
- materials according to claim 11 are used when an absolutely heavy metal-free projectile is required.
- the flow of the material is optimally used, in which a possible excess material can swell out from the inside.
- Figure a small-caliber jacket bullet with a low-pollution core.
- a floor is denoted by 100, which has a jacket 1 and a flattened tip 2. Inside, there is a core 8.
- the jacket 1 is cylindrical in its central part 3 and merges into a truncated cone 5 with sharp edges in its rear part 4.
- a compensating and sealing compound 9 is provided with a concave crowning 6 used for material compensation.
- the jacket 1 is in a known manner (according to EP -A- 0106411) made of plated steel.
- the core 8 consists of a mixture of tungsten powder and calcium stearate; the balancing and sealing compound 9 made of soft tin.
- the projectile 100 is produced in a very simple and economical manner:
- the shell is produced, as is customary in the case of the known ordnance ammunition, by deep-drawing a bowl made of plated steel. After squeezing it to the preliminary length, the core 8 is inserted in the form of a pre-compact and this is pressed to 400 MPa. Then the preformed leveling and sealing compound is inserted and the rear part 4 is shaped and flanged. Finally, the gag groove 7 is embossed and the projectile is calibrated to the finished dimension.
- the pre-compact is produced by intimately mixing 97% by weight of tungsten powder and 3% by weight of calcium stearate and then compression molding at a pressure of 300 MPa. Both components are commercially available, with the Wolf ramp powder having an average grain size of 5 ⁇ m has proven to be very useful for setting a density corresponding to the lead.
- the mass of the core can also be used in large-scale production reproducibly set to an accuracy of plus / minus 4/100 g.
- the mixture of tungsten powder and the powdered lubricant and lubricant can also be poured into the shell of the projectile, precisely metered, and pressed there, with pressures of 400 MPa being used at least in a last pressing.
- the subject of the invention has exactly the same flight dynamic properties as the previous lead-containing ordnance ammunition to be replaced, but does not cause the environmental and health problems resulting from intensive target practice.
- the manufacturing process described can basically be carried out with the previous equipment and the same personnel as the conventional floor manufacturing.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT99947175T ATE239206T1 (en) | 1998-10-30 | 1999-10-18 | PRODUCTION OF A LOW-POLLUTANT BULLET |
EP99947175A EP1125093B1 (en) | 1998-10-30 | 1999-10-18 | Production of a low-polluting jacketed bullet |
DE59905360T DE59905360D1 (en) | 1998-10-30 | 1999-10-18 | MANUFACTURE OF A LOW-POLLUTION SHEET LEVEL |
AU60755/99A AU6075599A (en) | 1998-10-30 | 1999-10-18 | Production of a low-polluting jacketed bullet |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98203670.9 | 1998-10-30 | ||
EP98203670A EP0997700A1 (en) | 1998-10-30 | 1998-10-30 | Non-polluting jacketed bullet and manufacturing method therefor |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000026605A1 true WO2000026605A1 (en) | 2000-05-11 |
Family
ID=8234280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH1999/000491 WO2000026605A1 (en) | 1998-10-30 | 1999-10-18 | Production of a low-polluting jacketed bullet |
Country Status (5)
Country | Link |
---|---|
EP (2) | EP0997700A1 (en) |
AT (1) | ATE239206T1 (en) |
AU (1) | AU6075599A (en) |
DE (1) | DE59905360D1 (en) |
WO (1) | WO2000026605A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004035385A1 (en) | 2003-08-05 | 2005-03-03 | Ruag Ammotec Gmbh | Partial decomposition projectile with solid core and core of pressed powder |
WO2005017442A1 (en) * | 2003-08-05 | 2005-02-24 | Ruag Ammotec Gmbh | Partial decomposition projectile with a massive core and a core made of pressed powder |
DE102004035371A1 (en) | 2003-08-05 | 2005-03-10 | Ruag Ammotec Gmbh | Partial decomposition projectile with double core |
PL1656534T3 (en) * | 2003-08-05 | 2012-12-31 | Ruag Ammotec Gmbh | Partial decomposition projectile with a double core |
CN103575169B (en) * | 2013-11-13 | 2015-04-08 | 北京科技大学 | Manufacturing method for high-specific-gravity and high-hardness cylindrical shot of shotgun |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2292047A (en) * | 1939-03-18 | 1942-08-04 | Remington Arms Co Inc | Ammunition |
US3888636A (en) * | 1971-02-01 | 1975-06-10 | Us Health | High density, high ductility, high strength tungsten-nickel-iron alloy & process of making therefor |
EP0106411A2 (en) * | 1982-10-18 | 1984-04-25 | Schweizerische Eidgenossenschaft vertreten durch die Eidg. Munitionsfabrik Thun der Gruppe für Rüstungsdienste | Small arms ammunition, and manufacturing process therefor |
EP0315393A2 (en) * | 1987-10-31 | 1989-05-10 | Michael Ernest Saxby | Training or marking bullets |
DE3835808A1 (en) * | 1988-10-21 | 1990-04-26 | Rheinmetall Gmbh | Method for producing hard-core projectiles (kinetic-energy projectiles) |
WO1996041112A2 (en) * | 1995-06-07 | 1996-12-19 | Lockheed Martin Energy Systems, Inc. | Non-lead, environmentally safe projectiles and explosives containers |
WO1997027447A1 (en) * | 1996-01-25 | 1997-07-31 | Remington Arms Company, Inc. | Lead-free frangible projectile |
US5789698A (en) * | 1997-01-30 | 1998-08-04 | Cove Corporation | Projectile for ammunition cartridge |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9318437D0 (en) | 1993-09-06 | 1993-10-20 | Gardner John Christopher | High specific gravity material |
-
1998
- 1998-10-30 EP EP98203670A patent/EP0997700A1/en not_active Withdrawn
-
1999
- 1999-10-18 WO PCT/CH1999/000491 patent/WO2000026605A1/en active IP Right Grant
- 1999-10-18 DE DE59905360T patent/DE59905360D1/en not_active Expired - Lifetime
- 1999-10-18 EP EP99947175A patent/EP1125093B1/en not_active Expired - Lifetime
- 1999-10-18 AU AU60755/99A patent/AU6075599A/en not_active Abandoned
- 1999-10-18 AT AT99947175T patent/ATE239206T1/en active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2292047A (en) * | 1939-03-18 | 1942-08-04 | Remington Arms Co Inc | Ammunition |
US3888636A (en) * | 1971-02-01 | 1975-06-10 | Us Health | High density, high ductility, high strength tungsten-nickel-iron alloy & process of making therefor |
EP0106411A2 (en) * | 1982-10-18 | 1984-04-25 | Schweizerische Eidgenossenschaft vertreten durch die Eidg. Munitionsfabrik Thun der Gruppe für Rüstungsdienste | Small arms ammunition, and manufacturing process therefor |
EP0315393A2 (en) * | 1987-10-31 | 1989-05-10 | Michael Ernest Saxby | Training or marking bullets |
DE3835808A1 (en) * | 1988-10-21 | 1990-04-26 | Rheinmetall Gmbh | Method for producing hard-core projectiles (kinetic-energy projectiles) |
WO1996041112A2 (en) * | 1995-06-07 | 1996-12-19 | Lockheed Martin Energy Systems, Inc. | Non-lead, environmentally safe projectiles and explosives containers |
WO1997027447A1 (en) * | 1996-01-25 | 1997-07-31 | Remington Arms Company, Inc. | Lead-free frangible projectile |
US5789698A (en) * | 1997-01-30 | 1998-08-04 | Cove Corporation | Projectile for ammunition cartridge |
Also Published As
Publication number | Publication date |
---|---|
DE59905360D1 (en) | 2003-06-05 |
EP0997700A1 (en) | 2000-05-03 |
ATE239206T1 (en) | 2003-05-15 |
EP1125093B1 (en) | 2003-05-02 |
EP1125093A1 (en) | 2001-08-22 |
AU6075599A (en) | 2000-05-22 |
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