Classifications

• • 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
  • C06B45/02—Compositions or products which are defined by structure or arrangement of component of product comprising particles of diverse size or shape
• • 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
  • 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

Definitions

• the present invention relates to a propellant powder charge with high progressivity and an extremely high degree of filling or loading density, intended primarily for large-bore barrel weapons.
• the propellant powder In order to launch a defined missile from a defined barrel weapon with a predetermined Vo, i.e. with a defined launch velocity immediately outside the barrel mouth, the propellant powder has to be able to deliver a certain additional amount of energy.
• This additional energy which can be calculated theoretically with great accuracy, must be delivered during the missile's travel through the barrel. This in turn means that the propellant powder must have time to burn out during the time the missile is on its way through the barrel. The period of time which the propellant powder should then have to burn out and which is thus the same as the time the missile has to pass through the barrel can be called the “burn time”.
• the length which a powder with the chemical composition in question is able to burn is also called the “burn time”, this means that the distance between two adjacent priming channels in a multiple-hole powder which has the desired burn time will correspond to twice the burn length which the burn time in question permits.
• the distance from respective priming channels to the outer side of the granular powder in which the priming channel is formed must be the same size, provided that the powder grains have not been surface-treated with a burn inhibitor, which is sometimes done in order to increase the powder's progressivity.
• the present invention now relates to a method using holed or unholed granular powder to produce progressive propellant powder charges with a higher degree of filling or loading density and thus also loading weights than has previously been possible.
• the invention also includes propellant powder charges produced in accordance with said method.
• the starting point for the method according to the invention is that, between the grains of a granular powder introduced into a container without any kind of organized order, there will automatically be a very large number of greater or lesser empty volumes which are many but small in the case of a finely grained powder and which are fewer but also larger in a coarser-grained powder.
• a propellant powder charge produced according to the invention can thus contain 70-95% by weight of a coarsely grained multiple-hole powder, for example a 19-hole or 37-hole powder, and 30-5% by weight of a smaller multiple-hole powder, for example a 1-hole powder or 7-holed powder, and, in view of the desired final result, the powders can each have the same or different chemcial composition and be surface-inhibited (surface-treated with suitable burn inhibitors) or not surface-inhibited.
• the aim has been to produce a powder charge with the highest possible degree of filling taking into consideration the powder types used, but the progressivity of the charges obtained by this method will be based primarily on the large spheres of powder bursting apart during combustion of the powder and thereafter burning like conventionally granular powder, whereas the progressivity for our specific charge is based entirely on the original geometrical shape of the powder grains used.
• the present invention thus relates to a method in which granular powder is used to produce propellant powder charges with high degree of filling or loading density and a high energy content per charge.
• the invention also covers the charge produced by this method.
• the invention also makes it possible to produce charges with precisely controlled progressive characteristics by virtue of the fact that it can be built up from different quantities of different powders which have radically different progressive characteristics.
• the invention is thus based entirely on combining two or more types of granular powder having such geometric external shapes and grain sizes that the powder with the smaller grain size will in the best possible way fill the empty space between the larger grains.

Landscapes

• Chemical & Material Sciences (AREA)
• Crystallography & Structural Chemistry (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Drilling And Exploitation, And Mining Machines And Methods (AREA)
• Cosmetics (AREA)
• Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
• Medicinal Preparation (AREA)
• Powder Metallurgy (AREA)
• Heat Treatment Of Articles (AREA)
• Cleaning In General (AREA)
• Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Applications Claiming Priority (3)

Publications (1)

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Family Applications (1)

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Cited By (1)

Families Citing this family (10)

Citations (22)

Family Cites Families (2)

• 2001
  • 2001-03-14 SE SE0100863A patent/SE518660C2/sv not_active IP Right Cessation
• 2002
  • 2002-03-01 DK DK02700974T patent/DK1379482T3/da active
  • 2002-03-01 IL IL15788802A patent/IL157888A0/xx active IP Right Grant
  • 2002-03-01 WO PCT/SE2002/000361 patent/WO2002074717A1/en active IP Right Grant
  • 2002-03-01 CA CA2440629A patent/CA2440629C/en not_active Expired - Lifetime
  • 2002-03-01 AT AT02700974T patent/ATE369326T1/de active
  • 2002-03-01 CZ CZ20032483A patent/CZ300130B6/cs not_active IP Right Cessation
  • 2002-03-01 JP JP2002573728A patent/JP2004531441A/ja active Pending
  • 2002-03-01 US US10/471,457 patent/US20050066835A1/en not_active Abandoned
  • 2002-03-01 AU AU2002233907A patent/AU2002233907B2/en not_active Expired
  • 2002-03-01 ES ES02700974T patent/ES2289077T3/es not_active Expired - Lifetime
  • 2002-03-01 EP EP02700974A patent/EP1379482B1/en not_active Expired - Lifetime
  • 2002-03-01 DE DE60221659T patent/DE60221659T2/de not_active Expired - Lifetime
  • 2002-03-01 PT PT02700974T patent/PT1379482E/pt unknown
• 2003
  • 2003-09-12 ZA ZA200307163A patent/ZA200307163B/en unknown
  • 2003-09-12 NO NO20034050A patent/NO328476B1/no not_active IP Right Cessation
• 2007
  • 2007-10-04 CY CY20071101267T patent/CY1106907T1/el unknown

Patent Citations (22)

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