EP0519798A1 - Verfahren zur Herstellung einer Hochleistung-Sprengladung und Vorrichtung zur Durchführung dieses Verfahren - Google Patents

Verfahren zur Herstellung einer Hochleistung-Sprengladung und Vorrichtung zur Durchführung dieses Verfahren Download PDF

Info

Publication number
EP0519798A1
EP0519798A1 EP92401657A EP92401657A EP0519798A1 EP 0519798 A1 EP0519798 A1 EP 0519798A1 EP 92401657 A EP92401657 A EP 92401657A EP 92401657 A EP92401657 A EP 92401657A EP 0519798 A1 EP0519798 A1 EP 0519798A1
Authority
EP
European Patent Office
Prior art keywords
mold
mixture
filtration
binder
explosive
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
EP92401657A
Other languages
English (en)
French (fr)
Other versions
EP0519798B1 (de
Inventor
André Espagnacq
Jean-Marie Lombard
Philippe Morand
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.)
Giat Industries SA
Original Assignee
Giat Industries SA
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 Giat Industries SA filed Critical Giat Industries SA
Publication of EP0519798A1 publication Critical patent/EP0519798A1/de
Application granted granted Critical
Publication of EP0519798B1 publication Critical patent/EP0519798B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/04—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams
    • B30B9/06—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams co-operating with permeable casings or strainers
    • 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
    • C06B21/0033—Shaping the mixture
    • C06B21/005—By a process involving melting at least part of the ingredients
    • 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
    • F42B33/0207—Processes for loading or filling propulsive or explosive charges in containers

Definitions

  • the present invention relates to a method for manufacturing a high-powered explosive charge, of the type consisting in mixing a high-power explosive in the form of solid particles with a liquid or molten binder, in pouring the pasty mixture obtained into a mold, evacuate the excess liquid binder and then allow the mixture to solidify to form said explosive charge.
  • the field of application of the present invention is that of secondary explosives for charges, in particular explosives intended for hollow charges and for which charges are desired whose rate of high-powered explosive is very high, the very low degree of porosity and the lowest possible axial density gradient.
  • the industrial manufacture of hollow charges is preferably obtained by a casting method.
  • One such method consists in mixing high-power explosive, for example hexogen and / or octogen, with an inert liquid component, for example a hardenable plastic resin, or an active one, for example molten TNT, the pasty mixture thus obtained being poured into the envelopes of hollow charges. Then the binder is allowed to harden.
  • the binder whether inert or active, inevitably constitutes a power reducer. The problem is therefore to reduce the rate of use of this binder as much as possible.
  • the object of the invention is to design a method and a device which make it possible to overcome the abovementioned drawbacks while providing other advantages.
  • the invention provides a method of manufacturing a high-powered explosive charge, of the aforementioned type and which is characterized in that it consists in removing the excess of liquid binder by filtration through porous walls of the mold, this filtration taking place substantially over the entire height thereof
  • the conventional method casting-compression is replaced by a casting-filtration process.
  • the evacuation of the excess of the liquid binder is carried out either by natural filtration, or by forced filtration by vibrating the mixture for a predetermined time, of the order of a few minutes.
  • the invention also provides a device for implementing this method and which is characterized in that the mold has porous walls to allow filtration of the excess liquid binder.
  • the mold consists of a rigid perforated grid against which a filtering envelope is applied, for example made of fabric, metallic or plastic fabric, or even filter paper, the envelope possibly comprising several filtering thicknesses.
  • the mold is advantageously of cylindrical shape and has a bottom wall bordered by a side wall open at its free end, and it is removably attached to a holding support.
  • the holding support comprises a hollow body of cylindrical shape open at one end or upper end, and a receptacle into which opens the lower end of the body, the mold being housed in a removable manner inside this body by providing an annular space between the mold and the internal wall of the body for the free passage of the excess liquid binder which falls by gravity into the recovery receptacle.
  • the implementation device is equipped with complementary means capable of creating in the body of the support for holding a depression around the mold and / or an overpressure at the level of the surface of the mixture. , as well as a porous or unmounted piston sliding in order to exert a compressive force on the surface of the mixture.
  • FIG. 1 Before explaining in detail the different phases of the process for manufacturing a high-powered explosive charge, according to the invention, a device for its implementation will be described beforehand as illustrated in FIG. 1.
  • the device 1 for implementing the method mainly comprises a mold 2 advantageously of cylindrical shape which has a bottom wall 3 bordered by a side wall 4 open at its free end and determined by a radially external rim 4a, and a support for holding 5 to which the mold 2 is fixed removably.
  • the bottom wall 3 and the side wall 4 of the mold 2 are porous walls which are constituted, with reference to FIGS. 1a and 1b, by a rigid support 6 such as sheet metal having perforations 6a each having an opening of the order of 10 mm, and by a filter envelope 7 which covers the interior wall of the mold 2.
  • This envelope 7 is constituted by a filtering material, for example, metallic canvas, plastic canvas or filter paper for example.
  • the casing 7 can be made up of two thicknesses 7a and 7b made up of different filtering materials.
  • the internal diameter of the mold 2 is slightly greater, of the order of 3 to 5 mm, than that of the filler that it is desired to obtain, and its height is sufficient to contain in addition to the filler , the extension which will then be removed by machining.
  • the mold 2 can advantageously be made in two parts in the form of two semi-cylindrical shells and / or flaring slightly at its upper part by delimiting a frustoconical shoulder 8 extended by the aforementioned radially external rim 4a.
  • Such a mold 2 is removably attached to the holding support 5 as described below with reference to FIG. 1.
  • the support 5 includes a cylindrical hollow body 9 where the mold 2 is housed, means 10 for fixing the mold 2 to the body 9, and a receptacle 11 into which the lower end of the body 9 opens.
  • the body 9 has, towards its end opposite to that opposite the receptacle 11, an internal wall which widens slightly outwards to form a frustoconical shoulder 9a of a shape complementary to that of the mold shoulder 8
  • the internal diameter of the body 9 is greater than the external diameter of the mold 2, so that the mold 2 can be freely mounted inside the body 9 by delimiting between them an annular space E.
  • the mold 2 is retained in the body 9 by means of its shoulder 8 which bears on the complementary shoulder 9a of the body 9. In this position, the external rim 4a of the mold 2 is supported on the upper end surface of the body 9, the rim 4a forming the mold retaining element 2 in the absence of the shoulders 8 and 9a.
  • the fastening means 10 of the mold 2 inside the body 9 consist of a ring 10a with a diameter substantially equal to that of the body 9.
  • This ring 10a is attached coaxially to the body 9, so as to come to bear on the rim 4a of the mold 2 to immobilize the latter, the ring 10a being itself fixed to the body 9 by any suitable means, known per se.
  • the receptacle 11 comprises a bottom wall 12 bordered by a lateral cylindrical wall 13 whose diameter is substantially equal to that of the body 9, and it forms a recovery chamber 14. This receptacle 11 once positioned under the body 9 is fixed to the latter by any suitable means known in oneself.
  • This device 1 makes it possible to manufacture a charge of explosive containing a high percentage of high-powered explosive according to the process according to the invention which takes place generally according to four main stages.
  • a mixture of high power explosives is prepared, for example octogen and / or hexogen in the form of solid particles with a liquid binder such as molten TNT.
  • the pasty mixture which must then be able to be poured inside the mold 2 comprises around 75% by weight of explosive and 25% by weight of TNT. Specific examples will be given later.
  • a third step, or filtration step the excess liquid binder in the mixture is evacuated naturally through the porous walls 3 and 4 of the mold 2 and is collected in the chamber 14 of the receptacle 11, after having passed through the filter envelope 7 and the perforations 6a of the perforated sheet 6 of the mold 2.
  • the duration of the filtration step is of the order of a few minutes, and in general, the mold 2 is kept at a temperature higher than that of the melting of the binder.
  • the mixture is allowed to solidify inside the mold 2, and the explosive charge is then removed from the mold.
  • the filtration operation takes place in a natural way.
  • the device 1 is equipped with vibrating means shown diagrammatically at 20 and which act directly on the holding support (5) of the mold 2.
  • These means can for example consist of a vibrating table on which the holding support 5 is fixed. .
  • a depression is created inside the space E provided between the mold 2 and the retaining body 5, so as to facilitate the filtration operation of the mixture contained in the mold 2.
  • a conduit 21 which is connected to a device 22 known per se which makes it possible to create this depression.
  • an overpressure is created at the level of the upper surface of the mixture contained in the mold 2 to also favor the filtration operation.
  • the implementation device is completed by a cover 25 which closes the upper end of the holding support 5 which then forms a closed enclosure.
  • a passage 26 is provided which communicates with a device 27, known per se, for sending pressurized air inside the holding body 5.
  • the mixture is slightly compressed always to facilitate the filtration operation of the excess liquid binder in the mixture contained in the mold 2.
  • This compression is ensured by means of a hollow piston 28 which is mounted sliding in the retaining body 5 and at the upper part thereof.
  • the piston 28 is hollow and its end surface adjacent to the mixture contained in the mold 2 is advantageously porous and constituted for example by a filtering wall 29 having the same constitution as the walls of the mold 2.
  • FIG. 5 shows an alternative embodiment of FIG. 4, in which the piston 28 is a full piston.
  • the step of solidifying the mixture, after natural or forced evacuation of the excess liquid binder, is accompanied by an operation for cooling the mixture.
  • This operation is advantageously carried out when the binder used is a fusible product, because it allows the shrinkage phenomenon to be limited to the upper part of the solidified block, part which is then eliminated.
  • this cooling operation there is provided in the holding support 5, a continuous channel 30 in the form of a serpentine which extends over the entire height of the mold 2.
  • This inner channel 30 opens out to the outside. towards the lower and upper parts of the retaining body 5, and it communicates via outward and return conduits 32 with a cooling device 33, known per se, which circulates a coolant and comprises a circulation pump and an exchanger of heat for example.
  • FIG. 7 is illustrated a variant of the embodiment of FIG. 6 to improve the cooling operation of the mixture during solidification.
  • the bottom wall 3 of the mold 2 is pierced with a central opening 35 on which rests by the base a conical block 36 supporting the hollow charge coating 37.
  • a hollow charge consists of a metallic coating of conical shape onto which the explosive is poured.
  • the device for implementing the method according to the invention in the example considered in FIG. 7 includes this coating of hollow charge 37 supported by the block conical 36, so as to directly obtain a hollow charge after solidification of the mixture which sticks to the coating.
  • the solidified mixture once demolded when it is intended to constitute the explosive of a hollow charge, it must undergo a machining operation consisting in digging a conical recess in which the hollow charge coating is then bonded.
  • these other implementing devices can be equipped with these means 36 and 37 for manufacturing hollow charges.
  • a cooling circuit of the mixture which comprises by two circuits respectively external and internal.
  • the external circuit is similar to that shown in FIG. 6 with an internal channel 30 in the retaining body 5 which is connected by outward and return conduits 32 to a cooling device 33.
  • the internal cooling circuit comprises a continuous channel 40 in the form of a coil which is housed inside the conical block 36, channel 40 which is connected by outward and return conduits 42 to a cooling device 43 similar to the device 33.
  • the pasty mixture produced during the first step of the process initially contains 76% by weight of industrial quality octogen according to a particle size between 0 and 800 ⁇ m, and 24% of molten TNT.
  • the pasty mixture produced during the first step of the process contains 80% by weight of octogen according to a particle size between 0 and 1600 ⁇ m, and 20% by weight of molten TNT.
  • the pasty mixture produced during the first step of the process contains 83% by weight of octogen according to a particle size between 0 and 1000 ⁇ m and 17% by weight of molten TNT.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtering Materials (AREA)
EP19920401657 1991-06-21 1992-06-16 Verfahren zur Herstellung einer Hochleistung-Sprengladung und Vorrichtung zur Durchführung dieses Verfahren Expired - Lifetime EP0519798B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9107606A FR2677977A1 (fr) 1991-06-21 1991-06-21 Procede de fabrication d'une charge explosive de grande puissance et dispositif de mise en óoeuvre du procede.
FR9107606 1991-06-21

Publications (2)

Publication Number Publication Date
EP0519798A1 true EP0519798A1 (de) 1992-12-23
EP0519798B1 EP0519798B1 (de) 1996-04-17

Family

ID=9414094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920401657 Expired - Lifetime EP0519798B1 (de) 1991-06-21 1992-06-16 Verfahren zur Herstellung einer Hochleistung-Sprengladung und Vorrichtung zur Durchführung dieses Verfahren

Country Status (3)

Country Link
EP (1) EP0519798B1 (de)
DE (1) DE69209905T2 (de)
FR (1) FR2677977A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2270181C1 (ru) * 2004-08-03 2006-02-20 ФГУП "Бийский олеумный завод" Состав литого взрывчатого вещества (варианты)
FR2954308A1 (fr) * 2009-12-23 2011-06-24 Nexter Munitions Composition explosive fusible/coulable et a vulnerabilite reduite
CN109400425A (zh) * 2018-10-25 2019-03-01 山西北方兴安化学工业有限公司 一种包覆层反向浇铸模具
CN109485529A (zh) * 2018-10-31 2019-03-19 四川大学 一种用于发射药挤压机的药料均流装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1469114A (en) * 1921-11-14 1923-09-25 Simpson James Fruit press
FR52514E (fr) * 1942-07-24 1945-04-17 Procédé de traitement et de séchage de la tourbe
US2800072A (en) * 1954-04-28 1957-07-23 American Viscose Corp Cylindrical press assembly
GB888858A (en) * 1951-08-15 1962-02-07 Hercules Powder Co Ltd Method and apparatus for manufacture of cast plastic compositions
DE3529123C1 (en) * 1985-08-14 1987-04-23 Messerschmitt Boelkow Blohm Process and device for producing explosive charges
DE8904735U1 (de) * 1989-04-14 1989-06-01 Pettay, Franz, 8900 Augsburg Fruchtsaft-Filterpresse

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1469114A (en) * 1921-11-14 1923-09-25 Simpson James Fruit press
FR52514E (fr) * 1942-07-24 1945-04-17 Procédé de traitement et de séchage de la tourbe
GB888858A (en) * 1951-08-15 1962-02-07 Hercules Powder Co Ltd Method and apparatus for manufacture of cast plastic compositions
US2800072A (en) * 1954-04-28 1957-07-23 American Viscose Corp Cylindrical press assembly
DE3529123C1 (en) * 1985-08-14 1987-04-23 Messerschmitt Boelkow Blohm Process and device for producing explosive charges
DE8904735U1 (de) * 1989-04-14 1989-06-01 Pettay, Franz, 8900 Augsburg Fruchtsaft-Filterpresse

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2270181C1 (ru) * 2004-08-03 2006-02-20 ФГУП "Бийский олеумный завод" Состав литого взрывчатого вещества (варианты)
FR2954308A1 (fr) * 2009-12-23 2011-06-24 Nexter Munitions Composition explosive fusible/coulable et a vulnerabilite reduite
WO2011086246A1 (fr) * 2009-12-23 2011-07-21 Nexter Munitions Composition explosive fusible/coulable et a vulnerabilite reduite
US9242906B2 (en) 2009-12-23 2016-01-26 Nexter Munitions Melt-cast insensitive explosive composition
CN109400425A (zh) * 2018-10-25 2019-03-01 山西北方兴安化学工业有限公司 一种包覆层反向浇铸模具
CN109400425B (zh) * 2018-10-25 2020-12-08 山西北方兴安化学工业有限公司 一种包覆层反向浇铸模具
CN109485529A (zh) * 2018-10-31 2019-03-19 四川大学 一种用于发射药挤压机的药料均流装置
CN109485529B (zh) * 2018-10-31 2019-07-12 四川大学 一种用于发射药挤压机的药料均流装置

Also Published As

Publication number Publication date
EP0519798B1 (de) 1996-04-17
FR2677977A1 (fr) 1992-12-24
DE69209905D1 (de) 1996-05-23
DE69209905T2 (de) 1996-09-05
FR2677977B1 (de) 1994-07-13

Similar Documents

Publication Publication Date Title
EP0646762B1 (de) Verbrennbare Hulsenteile für Artilleriegeschosse, Verfahren zu deren Herstellung und Verwendung derselben
FR2626508A1 (fr) Moule de coulee de metaux, equipe d'un manchon contenant un filtre
CA3119413A1 (fr) Procede de fabrication par addition de matiere d'un support inorganique de filtration a partir d'une composition thermofusible et membrane obtenue
FR2616363A1 (fr) Procede et dispositif de moulage en sable de pieces composites a matrice en alliage leger et insert fibreux
FR2582553A1 (fr) Dispositif et procede de coulee de metal
EP0519798B1 (de) Verfahren zur Herstellung einer Hochleistung-Sprengladung und Vorrichtung zur Durchführung dieses Verfahren
CA2600274C (fr) Procede ameliore de preparation de composites a matrice metallique et dispositif de mise en oeuvre d'un tel procede
FR2776656A1 (fr) Procede de fabrication d'un objet a partir d'un materiau granulaire, tube allumeur et charge propulsive obtenus avec un tel procede
FR2676050A1 (fr) Support en materiau ceramique pour un element accumulateur electrochimique de puissance et son procede de fabrication.
CH637314A5 (fr) Procede et installation de moulage sous basse pression de pieces metalliques dans un moule comportant une carapace en sable a paroi mince.
EP0060167A1 (de) Verfahren zur Herstellung von Metallkörpern durch Formen und Sintern eines legierten Metallpulvers
FR2670051A1 (fr) Procede et dispositif de fabrication d'un support d'electrolyte solide et support d'electrolyte solide obtenu par ce procede.
FR2874340A1 (fr) Procede de fonderie de pieces en carapace, grappe et carapace pour sa mise en oeuvre, aube de turboreacteur obtenue par un tel procede, et moteur d'aeronef comportant de telles aubes
WO2020120891A1 (fr) Procédé de nettoyage d'une pièce fabriquée par un procédé de fabrication additive avec au moins un bouchon et un changement de phase d'un produit de nettoyage
FR2690374A1 (fr) Procédé de fabrication d'un produit Óoeuvré et matériau céramique fritté obtenu par ce procédé.
FR2773337A1 (fr) Procede et installation de coulee sous basse pression dans un moule a coquille ceramique
EP1260334B1 (de) Verfahren und Vorrichtung zur Herstellung van Bauelementen
EP3003998A1 (de) Verfahren zur herstellung eines glasbehälters durch pressen
EP0557154B1 (de) Verfahren zur Herstellung von Sprengstoff-Formkörpern; Vorrichtung zur Ausführung des Verfahrens; Explosifladung und Munition damit hergestellt
BE1010166A6 (fr) Outil abrasif et procede de fabrication de cet outil.
EP0091533A1 (de) Giesseinrichtung zur Herstellung von metallischen Gegenständen mit komplizierten Formen durch Schmelzen
EP0324840B1 (de) Verfahren und vorrichtung zur herstellung von giessformen mit granuliertem material
FR2525519A1 (fr) Procede de moulage de produits creux en beton et boite de raccordement obtenue selon ce procede
EP3774303B1 (de) Werkzeug zur umsetzung eines verfahrens zum flash-sintern eines natürlichen pulvers
FR2555745A1 (fr) Procede, moule et dispositif incluant ledit moule pour prelever des echantillons dans un bain de metal en fusion, lequel metal, notamment de la fonte, est cassant a l'etat solidifie

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE GB SE

17P Request for examination filed

Effective date: 19930119

17Q First examination report despatched

Effective date: 19950307

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE GB SE

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19960419

REF Corresponds to:

Ref document number: 69209905

Country of ref document: DE

Date of ref document: 19960523

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20010417

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010530

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010607

Year of fee payment: 10

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020616

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020617

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030101

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20020616