IL147895A - Barrel erosion reducing combustible ammunition part such as propellent charge casing - Google Patents
Barrel erosion reducing combustible ammunition part such as propellent charge casingInfo
- Publication number
- IL147895A IL147895A IL147895A IL14789502A IL147895A IL 147895 A IL147895 A IL 147895A IL 147895 A IL147895 A IL 147895A IL 14789502 A IL14789502 A IL 14789502A IL 147895 A IL147895 A IL 147895A
- Authority
- IL
- Israel
- Prior art keywords
- ammunition part
- erosion
- combustible
- combustible ammunition
- reducing
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
- C06B23/04—Compositions characterised by non-explosive or non-thermic constituents for cooling the explosion gases including antifouling and flash suppressing agents
-
- 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
- F42B5/192—Cartridge cases characterised by the material of the casing wall
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Description
BARREL EROSION REDUCING COMBUSTIBLE AMMUNITION PART SUCH AS PROPELLENT CHARGE CASING p n Pearl Cohen Zedek Latzer Combustible moulded ammunition part The invention relates to a combustible moulded ammunition a propellant charge casing or propellant charge wherein the combustible moulded ammunition part contains an High energy propellant as required for firing produce high temperatures and pressures in the barrel of the respective weapon and accordingly also cause increased wear of the barrel due to To reduce such erosion it is known to add wax or a similar material to the propellant it has been found that the effect of such additives is relatively From DE 39 27 400 A1 it is also known that wax or paraffin as substance is not added to the propellant but put in a moulded ammunition part consisting of combustible plastic shrink Also in this case no significant reduction of the erosive effect of the propellant powder on the inside of the respective weapon barrel was It is the object of the invention to provide a moulded ammunition part of a combustible which contains additives that produce a better reduction of the erosive effect of the propellant powder on the inside surface of a weapon barrel than known comparable According to the invention this object is achieved by the characteristics of claim 1 particularly advantageous embodiments of the invention are disclosed in the secondary Thus according to the there is provided a combustible moulded ammunition a charge casing or propellant charge wherein the combustible moulded ammunition part contains an characterised in that the substance is an oxide of one of the elements of the rare or of one of the elements of the 6th subgroup of the periodic table or or polyoxymethylene The invention is essentially based the idea of using as additive an oxide of one of the elements of the rare especially or of one of the elements of the 6th subgroup of the periodic table or especially Mo03 or or polyoxymethylene or a combination of these The surprisingly good effect of these oxides can probably be attributed to their ablative which leads to a cooling of the inside wall of the weapon barrel from which the ammunition in question is The ablative effect of the oxides can be explained by the high negative formation heat ΔΗ of these oxides and the relatively low boiling The evaporation enthalpy of the which because of their embedding in the wall areas of the moulded ammunition part rest practically directly against the inside wall of the weapon cools the latter so that the erosion is noticeably With one exemplified where as additive tungsten trioxide was used in the propellant charge the erosion on the inside surface of a corresponding weapon barrel dropped by 47 compared to conventional ammunition where no additive was used in the propellant charge To manufacture the moulded ammunition part according to the 2 to 1 by mass of one or several substances are mixed into The aqueous slurry of the raw material required to manufacture the moulded and subsequently the moulded part is produced in the known manner by applying it to a mould mandrel insufficientOCRQuality
Claims (4)
1. Combustible ammunition part, such as a propellant charge sleeve or a propellant charge case, having the following features: a) the combustible ammunition part contains 2 to 15% of an erosion-reducing, additive; b) the erosion-reducing additive is an oxide of one of the rare earth elements or of one of the elements from transition group 6 of the periodic system or is polyoxymethylene (POM) .
2. Combustible ammunition part according to Claim 1, characterized in that the erosion-reducing additive, j is La203, Ce02, Y2O3.
3. Combustible ammunition part according to Claim 1, characterized in that the erosion-reducing additivej is M0O3 or WO3.
4. Combustible ammunition part according to one of Claims 1 to 3, characterized in that the ammunition part contains an addition of a plurality of erosion-reducing /additives. P-4804-IL
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10103912A DE10103912A1 (en) | 2001-01-30 | 2001-01-30 | Flammable molded ammunition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IL147895A0 IL147895A0 (en) | 2002-08-14 |
| IL147895A true IL147895A (en) | 2006-10-31 |
Family
ID=7672080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL147895A IL147895A (en) | 2001-01-30 | 2002-01-29 | Barrel erosion reducing combustible ammunition part such as propellent charge casing |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20020121212A1 (en) |
| EP (1) | EP1227295B8 (en) |
| CA (1) | CA2369701C (en) |
| DE (2) | DE10103912A1 (en) |
| IL (1) | IL147895A (en) |
| ZA (1) | ZA200200706B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004028370A1 (en) * | 2004-06-11 | 2005-12-29 | Rheinmetall Waffe Munition Gmbh | A bullet shootable from a gun barrel |
| DE102004044634A1 (en) * | 2004-09-15 | 2006-03-16 | Rheinmetall Waffe Munition Gmbh | Combustible propellant charge case for barrel-projected munitions contains an erosion-reducing additive comprising polyacetylene or a metal oxide and optionally also polyoxymethylene |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3426684A (en) * | 1968-01-18 | 1969-02-11 | Wegematic Corp | Wear reduction additives |
| DE3150290C2 (en) * | 1981-12-18 | 1986-06-05 | WNC-Nitrochemie GmbH, 8261 Aschau | Propellant charge powder with a smooth surface coating and a method for production |
| DE3927400A1 (en) | 1989-08-19 | 1991-02-21 | Rheinmetall Gmbh | Combustible propellant charge case - made of plastics shrink-foil contg. pyrotechnic mixt. |
| DE29618429U1 (en) * | 1996-10-22 | 1996-12-19 | Becker, Felix, 80335 München | Gun barrel cleaning tool |
| FR2802918B1 (en) * | 1999-12-23 | 2002-05-03 | Giat Ind Sa | PROPELLANT LOADING ADDITIVE, IN PARTICULAR ANTI-WEAR ADDITIVE, FUEL OBJECT AND PROPULSIVE LOADING INCORPORATING SUCH AN ADDITIVE |
-
2001
- 2001-01-30 DE DE10103912A patent/DE10103912A1/en not_active Withdrawn
-
2002
- 2002-01-12 DE DE50202751T patent/DE50202751D1/en not_active Expired - Lifetime
- 2002-01-12 EP EP02000736A patent/EP1227295B8/en not_active Expired - Lifetime
- 2002-01-25 ZA ZA200200706A patent/ZA200200706B/en unknown
- 2002-01-29 IL IL147895A patent/IL147895A/en active IP Right Grant
- 2002-01-30 CA CA2369701A patent/CA2369701C/en not_active Expired - Fee Related
- 2002-01-30 US US10/058,832 patent/US20020121212A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| DE10103912A1 (en) | 2002-08-01 |
| EP1227295A2 (en) | 2002-07-31 |
| CA2369701A1 (en) | 2002-07-30 |
| IL147895A0 (en) | 2002-08-14 |
| EP1227295B8 (en) | 2005-06-08 |
| EP1227295B1 (en) | 2005-04-13 |
| ZA200200706B (en) | 2002-08-12 |
| US20020121212A1 (en) | 2002-09-05 |
| EP1227295A3 (en) | 2003-05-14 |
| DE50202751D1 (en) | 2005-05-19 |
| CA2369701C (en) | 2012-11-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FF | Patent granted | ||
| KB | Patent renewed | ||
| KB | Patent renewed | ||
| KB | Patent renewed | ||
| KB | Patent renewed | ||
| KB | Patent renewed |