WO2007043942A1 - Method for producing propellant charges from a granulated propellant, preferably granulated powder, and propellant charges produced in accordance with the aforementioned method - Google Patents
Method for producing propellant charges from a granulated propellant, preferably granulated powder, and propellant charges produced in accordance with the aforementioned method Download PDFInfo
- Publication number
- WO2007043942A1 WO2007043942A1 PCT/SE2006/001134 SE2006001134W WO2007043942A1 WO 2007043942 A1 WO2007043942 A1 WO 2007043942A1 SE 2006001134 W SE2006001134 W SE 2006001134W WO 2007043942 A1 WO2007043942 A1 WO 2007043942A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- propellant
- vacuum
- granulated
- charges
- producing
- Prior art date
Links
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
- F42B5/16—Cartridges, i.e. cases with charge and missile characterised by composition or physical dimensions or form of propellant charge, with or without projectile, or powder
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B45/00—Compositions or products which are defined by structure or arrangement of component of product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
- F42B33/02—Filling cartridges, missiles, or fuzes; Inserting propellant or explosive charges
-
- 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
Definitions
- the present invention relates to a method for producing propellant charges with a high charge density consisting of a granulated propellant lying loosely in the propellant charge and to propellant charges produced in accordance with the aforementioned method, and primarily propellant charges for barrel weapons .
- propellant charges for artillery pieces and anti-aircraft guns consist of granulated powder, very frequently of the hollow type.
- Propellant charges consisting of a granulated propellant will always contain numbers of empty spaces of different sizes between the granules, however, depending on the form and size of the granules. This means that optimal use is not made of the charge space.
- PURPOSE OF THE INVENTION AND DISTINCTIVE FEATURES it is now proposed, instead of active mechanical compaction, to increase the charging density of the granulated propellant charges by vacuum-packing the propellant by vacuum suction in an airtight and moisture-tight and preferably combustible and flexible material, for example in the form of pouches of some form of plastic, metal or rubber, for example polyethylene film, aluminium foil, etc.
- the packaging material can consist of one or more layers of one or more different materials. The principal consideration is to ensure that the finished pack is sufficiently airtight to permit the granules inside the pack to be packed together by the applied vacuum, and that this vacuum is capable of being maintained during the necessary period of use of the propellant charge.
- An improved method of producing propellant charges with a high charge density consisting of a granulated propellant lying loosely in the propellant charge has thus been achieved according to the present invention, which improved method of production is characterized in that a quantity of granulated propellant contained in the propellant charge is vacuum-packed in an airtight packaging material.
- the propellant is vacuum-packed in pouches made of a material of which the inside and/or outside has been coated with a wear protection substance and/or decoppering material;
- the vacuum-pack or the vacuum-packs of the propellant is/are formed in such a way that a desired space is obtained around the propellant charge inside the case and/or against other ammunition components present inside the ammunition case.
- the propellant charge according to the invention is characterized in that it comprises a quantity of granulated propellant in accordance with the method vacuum-packed in a pouch made of a material adapted for vacuum-packing.
- the actual vacuum-packing of the propellant can be performed in principle with existing equipment in the form of vacuum pumps and plastic welding machines, even if it is necessary, of course, to take the safety aspects into consideration having regard for the ease of ignition of the propellant.
- the improvement achieved in accordance with the invention can be considered as being marginal, although in view of the continuing competition between defence and counter-measures, any improvement can be quite valuable, especially since the improvement proposed here can be achieved by very simple means.
- the charging density that is to say the granulate density of the propellant, can very probably be increased further with a more powerful vacuum pump, and with it also the weight of the charge.
- the invention is also associated with the advantage that the propellant could already be pre-packed by the manufacturer .
- a further advantage associated with the invention is that it would be possible, with a propellant vacuum- packed in suitable pouches, to form a desired space around the charge inside the case and/or against other ammunition components present inside the ammunition case, such as the fuse, the projectile part, etc., and thereby to improve the propagation of the propellant.
- the pouches utilized for the vacuum-packing of the explosive substance could, if necessary, be coated internally and/or externally with conventional wear protection substances and decoppering materials.
- the invention can be utilized for all types of charges, in which an explosive substance in the form of a powder or granulate, that is to say a more or less finely distributed propellant, is utilized for the propulsion of projectiles through some form of barrel weapon, for example for artillery ammunition, anti-aircraft ammunition, trench mortar ammunition, etc.
- the propellant and the propellant charge that are described above usually consist of granulates of some form of powder or powder charge, although it will be appreciated that the invention covers all explosive substances and all propellant charges which contain smaller units that require to be packed together into a certain volume, where a part of that volume consists of an empty space between the constituent units that is capable of compaction.
Abstract
The present invention proposes a novel method for producing powder charges with a high charge density consisting of a granulated powder lying loosely in the charge. In accordance with the invention, the powder is vacuum-packed in airtight pouches made of a combustible and preferably flexible packaging material .
Description
METHOD FOR PRODUCING PROPELLANT CHARGES FROM A GRANULATED PROPELLANT, PREFERABLY GRANULATED POWDER, AND PROPELLANT CHARGES PRODUCED IN ACCORDANCE WITH THE AFOREMENTIONED METHOD
TECHNICAL FIELD
The present invention relates to a method for producing propellant charges with a high charge density consisting of a granulated propellant lying loosely in the propellant charge and to propellant charges produced in accordance with the aforementioned method, and primarily propellant charges for barrel weapons .
PRESENTATION OF THE PROBLEM AND PREVIOUSLY DISCLOSED METHOD
Efforts have been made more or less constantly in the area of artillery technology to increase the range and armour penetration capability of existing and newly designed artillery pieces, which in both cases means that the muzzle velocities of the projectiles concerned must be increased. As a rule, with regard to increasing the muzzle velocity from older barrel weapons, for example artillery pieces, there has been the advantage that even these older, yet fully functional, barrel weapons would be capable, purely from the point of view of their strength, of withstanding larger propellant charges than the charges for which the aforementioned barrel weapons were originally intended. The solution to the problems of giving the ammunition for such weapons a longer range and better penetration would then be to increase the energy content of the propellant charges by increasing the weight of the charge, that is to say by packing even more explosive substance into the existing charging space of the ammunition in question or the weapon so that the charging density increases, although the problem that often presents itself then is that the charging spaces present in the respective artillery pieces or ammunition cases have already been utilized optimally
having regard for the available types of propellant.
The most common type of propellant charges for artillery pieces and anti-aircraft guns consists of granulated powder, very frequently of the hollow type. Propellant charges consisting of a granulated propellant will always contain numbers of empty spaces of different sizes between the granules, however, depending on the form and size of the granules. This means that optimal use is not made of the charge space.
Attempts have accordingly been made for some time to reduce the combined volume of empty spaces within the propellant charges, among other things by mixing a propellant charge with different sizes of granulate, with the intention that more fine-grained propellant components will fill the empty spaces between more coarse-grained propellant components. It is also known that the charge density, in particular in the case of cartridge ammunition charged with a granulated propellant, can be increased to a certain degree by compacting the propellant inside the cartridge case intended for the propellant charge, although at the same time this means that the granules will be deformed to a greater or lesser degree, depending on the degree of compaction, which in turn has a negative effect on the characteristics of the propellant.
PURPOSE OF THE INVENTION AND DISTINCTIVE FEATURES In accordance with the present invention, it is now proposed, instead of active mechanical compaction, to increase the charging density of the granulated propellant charges by vacuum-packing the propellant by vacuum suction in an airtight and moisture-tight and preferably combustible and flexible material, for example in the form of pouches of some form of plastic, metal or rubber, for example polyethylene film, aluminium foil, etc. It will be appreciated that the packaging material can consist of one or more layers of
one or more different materials. The principal consideration is to ensure that the finished pack is sufficiently airtight to permit the granules inside the pack to be packed together by the applied vacuum, and that this vacuum is capable of being maintained during the necessary period of use of the propellant charge.
An improved method of producing propellant charges with a high charge density consisting of a granulated propellant lying loosely in the propellant charge has thus been achieved according to the present invention, which improved method of production is characterized in that a quantity of granulated propellant contained in the propellant charge is vacuum-packed in an airtight packaging material.
According to other aspects of the method in accordance with the invention, it is true:
- that the granulated propellant is vacuum-packed in combustible pouches of packaging material;
- that the granulated propellant is vacuum-packed in flexible pouches consisting of plastic that is welded together in an airtight fashion;
- that the granulated propellant is vacuum-packed in pouches consisting of metal foil;
- that the propellant is vacuum-packed in pouches made of a material of which the inside and/or outside has been coated with a wear protection substance and/or decoppering material;
- that the vacuum-packing of the propellant is performed directly into an ammunition case for which the propellant is intended.
- that the vacuum-pack or the vacuum-packs of the
propellant is/are formed in such a way that a desired space is obtained around the propellant charge inside the case and/or against other ammunition components present inside the ammunition case.
The propellant charge according to the invention is characterized in that it comprises a quantity of granulated propellant in accordance with the method vacuum-packed in a pouch made of a material adapted for vacuum-packing.
ADVANTAGES AND EFFECTS OF THE INVENTION:
The technique of vacuum-packing different materials in powder form, and in particular foodstuffs, in order for these to be packed in an aroma-tight fashion is by no means novel, although as far as we are aware it has never previously been proposed in the context of propellant charges, and even if an advantage can obviously be derived from the propellant being packed in an airtight and moisture-tight fashion in this way, the gentle compacting of the granules is the most sought-after feature in the context of propellants.
The actual vacuum-packing of the propellant can be performed in principle with existing equipment in the form of vacuum pumps and plastic welding machines, even if it is necessary, of course, to take the safety aspects into consideration having regard for the ease of ignition of the propellant.
Practical testing has revealed that it is very easy, with currently available equipment in the form of a relatively simple vacuum pump and plastic welding machine, to achieve an increase in the order of 5% in the weight of the charge for a particular quality of propellant, which, under otherwise unchanged circumstances, would provide an increase in the order of 2% in the muzzle velocity of, for example, a 40 mm armour-piercing projectile, which in turn would
theoretically mean an increase in the order of 3% in the armour penetration capability.
The improvement achieved in accordance with the invention can be considered as being marginal, although in view of the continuing competition between defence and counter-measures, any improvement can be quite valuable, especially since the improvement proposed here can be achieved by very simple means. The charging density, that is to say the granulate density of the propellant, can very probably be increased further with a more powerful vacuum pump, and with it also the weight of the charge.
The invention is also associated with the advantage that the propellant could already be pre-packed by the manufacturer .
A further advantage associated with the invention is that it would be possible, with a propellant vacuum- packed in suitable pouches, to form a desired space around the charge inside the case and/or against other ammunition components present inside the ammunition case, such as the fuse, the projectile part, etc., and thereby to improve the propagation of the propellant.
ALTERNATIVE EMBODIMENTS
In conclusion, it can also be pointed out that the pouches utilized for the vacuum-packing of the explosive substance could, if necessary, be coated internally and/or externally with conventional wear protection substances and decoppering materials.
It will be appreciated that the invention can be utilized for all types of charges, in which an explosive substance in the form of a powder or granulate, that is to say a more or less finely distributed propellant, is utilized for the propulsion of projectiles through some form of barrel weapon, for
example for artillery ammunition, anti-aircraft ammunition, trench mortar ammunition, etc.
The propellant and the propellant charge that are described above usually consist of granulates of some form of powder or powder charge, although it will be appreciated that the invention covers all explosive substances and all propellant charges which contain smaller units that require to be packed together into a certain volume, where a part of that volume consists of an empty space between the constituent units that is capable of compaction.
It will also be appreciated that the expression combustible material used above here also covers the rather broader meaning of the decomposition that takes place in conjunction with the explosive combustion of the propellant if the packaging material consists of a metal package.
The invention has been defined in the following patent
Claims .
Claims
1. Method for producing propellant charges with a high charge density consisting of a granulated propellant lying loosely in the propellant charge, characterized in that a quantity of granulated propellant contained in the propellant charge is vacuum-packed in an airtight packaging material .
2. Method for producing propellant charges with a high charge density according to Claim 1, characterized in that the granulated propellant is vacuum-packed in combustible pouches of packaging material.
3. Method for producing propellant charges with a high charge density according to Claims 1 or 2, characterized in that the granulated propellant is vacuum-packed in flexible pouches consisting of plastic that is welded together in an airtight fashion.
4. Method for producing propellant charges with a high charge density according to Claims 1, 2 or 3, characterized in that the granulated propellant is vacuum-packed in pouches consisting of metal foil .
5. Method for producing propellant charges with a high charge density according to one or other of Claims 1 - 4, characterized in that the propellant is vacuum- packed in pouches made of a material of which the inside and/or outside has been coated with a wear protection substance and/or decoppering material.
6. Method for producing propellant charges with a high charge density according to Claims 1 - 5, characterized in that the vacuum-packing of the propellant is performed directly into an ammunition case for which the propellant is intended.
7. Method for producing propellant charges with a high charge density according to Claims 1 - 6, characterized in that the vacuum-pack or the vacuum- packs of the propellant is/are formed in such a way that a desired space is obtained around the propellant charge inside the case and/or against other ammunition components present inside the ammunition case.
8. Propellant charge, characterized in that it comprises a quantity of granulated propellant in accordance with the method according to one or other of Claims 1-7 vacuum-packed in a pouch made of a material capable of vacuum-packing.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06799734A EP1934550A4 (en) | 2005-10-11 | 2006-10-06 | Method for producing propellant charges from a granulated propellant, preferably granulated powder, and propellant charges produced in accordance with the aforementioned method |
| US12/089,837 US7997178B2 (en) | 2005-10-11 | 2006-10-06 | Method for producing propellant charges from a granulated propellant, preferably granulated powder, and propellant charges produced in accordance with the aforementioned method |
| IL190516A IL190516A0 (en) | 2005-10-11 | 2008-03-30 | Method for producing propellant charges from a granulated propellant, preferably granulated powder, and propellant charges produced in accordance with the aforementioned method |
| NO20082196A NO20082196L (en) | 2005-10-11 | 2008-05-13 | Process for producing propellant charges from a granulated propellant, preferably granulated powder, and propellant charges produced according to the aforementioned methods |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0502239A SE528042C2 (en) | 2005-10-11 | 2005-10-11 | Preparation of high charge density propellant for artillery munitions, by vacuum packing propellant material in airtight packaging |
| SE0502239-7 | 2005-10-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007043942A1 true WO2007043942A1 (en) | 2007-04-19 |
Family
ID=36791447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SE2006/001134 WO2007043942A1 (en) | 2005-10-11 | 2006-10-06 | Method for producing propellant charges from a granulated propellant, preferably granulated powder, and propellant charges produced in accordance with the aforementioned method |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7997178B2 (en) |
| EP (1) | EP1934550A4 (en) |
| IL (1) | IL190516A0 (en) |
| NO (1) | NO20082196L (en) |
| SE (1) | SE528042C2 (en) |
| WO (1) | WO2007043942A1 (en) |
| ZA (1) | ZA200803026B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101028813B1 (en) * | 2009-01-19 | 2011-04-12 | 국방과학연구소 | Method and apparatus for loading cartridges with pressable plastic bonded exposive |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1439450A (en) * | 1974-02-08 | 1976-06-16 | Hesselgren K E | Method and device for filling a casing with particulate matter |
| SE441473B (en) * | 1984-02-21 | 1985-10-07 | Bofors Ab | Method and device for production of cylinder bound propulsive agents for firearms |
| US5335599A (en) * | 1991-11-21 | 1994-08-09 | Rheinmetall Gmbh | Ammunition unit |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2072671A (en) * | 1934-10-30 | 1937-03-02 | Hercules Powder Co Ltd | Ammunition and propellant charge therefor |
| DE3334026A1 (en) * | 1983-09-21 | 1985-04-04 | Rheinmetall GmbH, 4000 Düsseldorf | DRIVE CHARGE |
| IL74387A (en) * | 1984-02-21 | 1993-02-21 | Bofors Ab | Method and apparatus for production of cartridged propellant charges for barrel weapons |
| DE4118130A1 (en) * | 1991-06-03 | 1992-12-10 | Alkotex Srl | THREAD PROCESSING MACHINE, ESPECIALLY EMBROIDERY MACHINE WITH A THREAD CHANGING DEVICE |
| US5218166A (en) * | 1991-09-20 | 1993-06-08 | Mei Corporation | Modified nitrocellulose based propellant composition |
| SE519296C2 (en) * | 1997-08-14 | 2003-02-11 | Bofors Defence Ab | The booster module |
| GB0205559D0 (en) * | 2002-03-11 | 2002-04-24 | Bae Systems Plc | Improvements in and relating to the filling of explosive ordnance |
| GB0205565D0 (en) * | 2002-03-11 | 2002-04-24 | Bae Systems Plc | Explosives liner |
| US6877415B2 (en) * | 2002-11-01 | 2005-04-12 | Legend Products Corporation | Individual premeasured charges with reduced moisture content and method of producing same |
-
2005
- 2005-10-11 SE SE0502239A patent/SE528042C2/en unknown
-
2006
- 2006-10-06 EP EP06799734A patent/EP1934550A4/en not_active Withdrawn
- 2006-10-06 WO PCT/SE2006/001134 patent/WO2007043942A1/en active Application Filing
- 2006-10-06 US US12/089,837 patent/US7997178B2/en not_active Expired - Fee Related
- 2006-10-06 ZA ZA200803026A patent/ZA200803026B/en unknown
-
2008
- 2008-03-30 IL IL190516A patent/IL190516A0/en not_active IP Right Cessation
- 2008-05-13 NO NO20082196A patent/NO20082196L/en not_active Application Discontinuation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1439450A (en) * | 1974-02-08 | 1976-06-16 | Hesselgren K E | Method and device for filling a casing with particulate matter |
| SE441473B (en) * | 1984-02-21 | 1985-10-07 | Bofors Ab | Method and device for production of cylinder bound propulsive agents for firearms |
| US5335599A (en) * | 1991-11-21 | 1994-08-09 | Rheinmetall Gmbh | Ammunition unit |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP1934550A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA200803026B (en) | 2009-11-25 |
| EP1934550A4 (en) | 2011-11-23 |
| NO20082196L (en) | 2008-07-09 |
| US20090308234A1 (en) | 2009-12-17 |
| SE0502239L (en) | 2006-08-15 |
| EP1934550A1 (en) | 2008-06-25 |
| US7997178B2 (en) | 2011-08-16 |
| IL190516A0 (en) | 2008-11-03 |
| SE528042C2 (en) | 2006-08-15 |
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