EP0238959A2 - Corps de charge propulsive autoportant et charge compacte fabriquée à partir de ce corps - Google Patents

Corps de charge propulsive autoportant et charge compacte fabriquée à partir de ce corps Download PDF

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Publication number
EP0238959A2
EP0238959A2 EP87103739A EP87103739A EP0238959A2 EP 0238959 A2 EP0238959 A2 EP 0238959A2 EP 87103739 A EP87103739 A EP 87103739A EP 87103739 A EP87103739 A EP 87103739A EP 0238959 A2 EP0238959 A2 EP 0238959A2
Authority
EP
European Patent Office
Prior art keywords
bodies
propellant
propellant charge
nitrocellulose
charge
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
Application number
EP87103739A
Other languages
German (de)
English (en)
Other versions
EP0238959B1 (fr
EP0238959A3 (fr
Inventor
Johannes Eich
Erwin Radecke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dynamit Nobel AG filed Critical Dynamit Nobel AG
Publication of EP0238959A2 publication Critical patent/EP0238959A2/fr
Publication of EP0238959A3 publication Critical patent/EP0238959A3/fr
Application granted granted Critical
Publication of EP0238959B1 publication Critical patent/EP0238959B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F42B5/18—Caseless ammunition; Cartridges having combustible cases
    • 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
    • C06B45/18—Compositions or products which are defined by structure or arrangement of component of product comprising a coated component
    • C06B45/20—Compositions or products which are defined by structure or arrangement of component of product comprising a coated component the component base containing an organic explosive or an organic thermic component
    • C06B45/22—Compositions or products which are defined by structure or arrangement of component of product comprising a coated component the component base containing an organic explosive or an organic thermic component the coating containing an organic compound

Definitions

  • the present invention relates to pressed propellant charge bodies made of nitrocellulose and charges produced therefrom.
  • Pressed propellant charges are e.g. known from DE-OS 17 96 118. These propellant charge bodies are used for devices for commercial use and are in the form of tablets. They are relatively small and break very easily. In order to remedy this disadvantage, this property right proposes to coat these tablets with a protective resin film. However, such tablets are not suitable as propellant charges for projectiles.
  • nitrocellulose grains with resins, for example acrylic resins, and to produce propellant charges from these coated nitrocellulose grains which burn regardless of the temperature.
  • the resin coating over the Grains are preferably 10 to 20% by weight of the nitrocellulose; it causes the nitrocellulose to burn off with a time delay.
  • Such grains are therefore preferably used in a mixture with nitrocellulose grains not coated with resins in the so-called duplex adhesives (cf. US Pat. No. 4,106,960).
  • these nitrocellulose grains are used in cartridges or sleeves, into which they are poured and, if necessary, only pressed in under a low compression pressure. Such nitrocellulose grains have not previously been used for the production of self-supporting preforms.
  • propellant charge bodies which are predominantly based on single- or polybasic propellant charge powders, which are self-supporting, have sufficient mechanical strength without a resin coating and do not contain any additional binders or adhesives which could adversely affect the combustion properties.
  • the propellant charges according to the invention contain, as the predominant constituent, single- or multi-base propellant charge powder in the form of powder bodies. These powder bodies are preferably in the form of multi-hole powder bodies.
  • Nitrocellulose is the main component in both the single and multi-base powders.
  • the polybasic powders contain either a nitrocellulose / nitroglycol and / or a nitrocellulose / nitroglycerin mixture or have nitroguanidine and diethylene glycol dinitrate as additional combustible, gas-supplying components.
  • the powders can additionally contain small amounts of known stabilizers, combustion moderators or lubricants each in amounts up to a maximum of 2% by weight.
  • the acrylic resin coatings are applied to the powder bodies in a manner known per se by spray drying.
  • the resin is preferably sprayed on from an aqueous solution and the bodies are then dried with movement. This process may be repeated until the amount of resin applied is so large that it is between 0.5 to 6% by weight of the weight of the powder body.
  • the powder bodies thus encased are pressed to give the shaped bodies mentioned in claim 1.
  • the pressing is carried out in a manner known per se at a pressing pressure between 500 and 1,500 kg / cm 2 (49,000 to 150,000 Pa) without the addition of a binder or adhesive at a pressing temperature of 20 to 60 ° C.
  • the degree of compaction achieved can be up to 1.5 times the normal bulk density of the powder.
  • the moldings have a cylindrical shape. Their height generally corresponds to their diameter; however, it can also be up to 100%, preferably up to 50% larger than the diameter. It is also possible that their height is less than the diameter; however, it should not be less than 70% of the diameter.
  • the moldings are further characterized in that they contain an axial, central bore, the diameter of which is generally constant over its length. The diameter preferably corresponds to that of an ignition element and an ignition amplifier, with the aid of which the bodies are ignited in a charge according to the present invention. In general, the diameter of the bore is approximately 15 to 30% of the diameter of the cylindrical shaped bodies.
  • the bore within a compact can also have different diameters; this is particularly necessary in the case of bodies in which a projectile is fastened in the compact load according to the invention.
  • the bore then corresponds to the shape of the part of the projectile that is to be encased; In these cases, the pressing is expediently carried out with the projectile inserted into the mold.
  • the propellant charge bodies according to the invention are pressed without the addition of binders or adhesives, they have sufficient mechanical strength for further processing to give the compact charges. On the other hand, they disintegrate very easily under the action of gas and pressure, so that regular combustion after ignition is ensured. The burning behavior can be influenced by the degree of compression.
  • the propellant charge bodies serve as building blocks for compact charges that are used as propellant charge sets for projectiles. With the help of these building blocks, it is therefore possible to rationally use ammunition, e.g. for machine guns, with a high degree of automation to manufacture directly.
  • the compact charges according to the invention contain at least three of the propellant charge bodies lying one behind the other in such a way that their central bores form a continuous channel, at the beginning of which an ignition unit, possibly with an ignition amplifier, is arranged and which terminates with the tail end.
  • the propellant charge bodies are located within a sleeve made of combustible paper, the inside diameter of which corresponds to the outside diameter of the propellant charge cylinder.
  • combustible sleeves are known per se. Their manufacture is e.g. in GB-PS 909 391.
  • the propellant charge bodies which contain the projectile and the ignition unit (s), should have different densities. Their density should also be greater than the density of the shaped bodies arranged between them. The molded body that carries the projectile should have the highest density.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Medicinal Preparation (AREA)
  • Laminated Bodies (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
EP87103739A 1986-03-27 1987-03-14 Corps de charge propulsive autoportant et charge compacte fabriquée à partir de ce corps Expired - Lifetime EP0238959B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3610424 1986-03-27
DE3610424A DE3610424C1 (de) 1986-03-27 1986-03-27 Selbsttragender Treibladungskoerper und daraus hergestellte Kompaktladung

Publications (3)

Publication Number Publication Date
EP0238959A2 true EP0238959A2 (fr) 1987-09-30
EP0238959A3 EP0238959A3 (fr) 1991-11-06
EP0238959B1 EP0238959B1 (fr) 1993-11-10

Family

ID=6297432

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87103739A Expired - Lifetime EP0238959B1 (fr) 1986-03-27 1987-03-14 Corps de charge propulsive autoportant et charge compacte fabriquée à partir de ce corps

Country Status (3)

Country Link
US (1) US4724017A (fr)
EP (1) EP0238959B1 (fr)
DE (2) DE3610424C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996017220A1 (fr) * 1994-12-01 1996-06-06 Dynamit Nobel Aktiengesellschaft Cartouche

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2596145B1 (fr) * 1986-03-21 1990-03-09 Poudres & Explosifs Ste Nale Procede de fabrication d'objets combustibles par emboutissage de disques de papier combustible au moyen d'un poincon souple
US5237928A (en) * 1988-07-28 1993-08-24 Dynamit Nobel Aktiengesellschaft Combustible cartridge case
US5198616A (en) * 1990-09-28 1993-03-30 Bei Electronics, Inc. Frangible armor piercing incendiary projectile
US5524544A (en) * 1994-07-21 1996-06-11 Olin Corporation Nitrocellulose propellant containing a cellulosic burn rate modifier
DE4445990C2 (de) * 1994-12-22 1997-08-21 Rheinmetall Ind Ag Patrone mit einer Patronenhülse und einem Pfeilgeschoß
US5726378A (en) * 1996-04-01 1998-03-10 Hodgdon Powder Company, Inc. Unitary propellant charge for muzzle loading firearms
US6692655B1 (en) 2000-03-10 2004-02-17 Alliant Techsystems Inc. Method of making multi-base propellants from pelletized nitrocellulose
US6607618B1 (en) * 2000-08-28 2003-08-19 The United States Of America As Represented By The Secretary Of The Army Propellant compositions
US6688232B2 (en) 2001-12-31 2004-02-10 Legend Products Corporation Compressed powder charge for muzzleloader and black powder firearms
US7344610B2 (en) 2003-01-28 2008-03-18 Hodgdon Powder Company, Inc. Sulfur-free propellant compositions
US11988491B1 (en) * 2021-07-29 2024-05-21 Revolutionary Rounds L.L.C. Projectile and caseless cartridge
CN114456017B (zh) * 2022-01-28 2023-07-14 中北大学 一种中心开孔式按序分裂发射药及其成型模具

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB909391A (en) * 1957-11-18 1962-10-31 Isidore Groudan Nadel Improvements in and relating to propellants
GB1162158A (en) * 1965-09-21 1969-08-20 Us Government Improvements in Caseless Ammunition
US3679781A (en) * 1969-10-17 1972-07-25 Remington Arms Co Inc Molding plastic coated nitrocellulose
FR2340291A1 (fr) * 1976-02-03 1977-09-02 Dynamit Nobel Ag Charge propulsive a compensation de temperature
DE2656310A1 (de) * 1976-12-11 1978-06-15 Dynamit Nobel Ag Verfahren zur herstellung von langgestreckten sprengladungen und zugehoerige sprengladung
FR2374278A1 (fr) * 1976-12-20 1978-07-13 Poudres & Explosifs Ste Nale Chargement unitaire de poudre agglomeree

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2428632C3 (de) * 1974-06-14 1982-05-13 Bundesrepublik Deutschland, Vertreten Durch Den Bundesminister Der Verteidigung, 5300 Bonn Verfahren zum Herstellen von brennbaren Munitionsformteilen und Vorrichtung zur Durchführung des Verfahrens
GB1506495A (en) * 1975-04-09 1978-04-05 Ici Ltd Combustion inhibitors
JPS5747789A (en) * 1980-09-01 1982-03-18 Nippon Oils & Fats Co Ltd Sheet-like gunpowder, manufacture and use

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB909391A (en) * 1957-11-18 1962-10-31 Isidore Groudan Nadel Improvements in and relating to propellants
GB1162158A (en) * 1965-09-21 1969-08-20 Us Government Improvements in Caseless Ammunition
US3679781A (en) * 1969-10-17 1972-07-25 Remington Arms Co Inc Molding plastic coated nitrocellulose
FR2340291A1 (fr) * 1976-02-03 1977-09-02 Dynamit Nobel Ag Charge propulsive a compensation de temperature
DE2656310A1 (de) * 1976-12-11 1978-06-15 Dynamit Nobel Ag Verfahren zur herstellung von langgestreckten sprengladungen und zugehoerige sprengladung
FR2374278A1 (fr) * 1976-12-20 1978-07-13 Poudres & Explosifs Ste Nale Chargement unitaire de poudre agglomeree

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996017220A1 (fr) * 1994-12-01 1996-06-06 Dynamit Nobel Aktiengesellschaft Cartouche

Also Published As

Publication number Publication date
DE3610424C1 (de) 1987-09-10
EP0238959B1 (fr) 1993-11-10
US4724017A (en) 1988-02-09
EP0238959A3 (fr) 1991-11-06
DE3788078D1 (de) 1993-12-16

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