EP0557154B1 - Procédé de fabrication d'une charge explosive moulée; dispositif pour sa mise en oeuvre; charge explosive et munition ainsi obtenue - Google Patents

Procédé de fabrication d'une charge explosive moulée; dispositif pour sa mise en oeuvre; charge explosive et munition ainsi obtenue Download PDF

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Publication number
EP0557154B1
EP0557154B1 EP93400305A EP93400305A EP0557154B1 EP 0557154 B1 EP0557154 B1 EP 0557154B1 EP 93400305 A EP93400305 A EP 93400305A EP 93400305 A EP93400305 A EP 93400305A EP 0557154 B1 EP0557154 B1 EP 0557154B1
Authority
EP
European Patent Office
Prior art keywords
receptacle
piston
accordance
explosive
binder
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.)
Expired - Lifetime
Application number
EP93400305A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0557154A1 (fr
Inventor
Patrick Sylvain
Philippe Boule
Jean-Noel Bilbault
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.)
Luchaire Defense SA
Original Assignee
Luchaire Defense 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 Luchaire Defense SA filed Critical Luchaire Defense SA
Publication of EP0557154A1 publication Critical patent/EP0557154A1/fr
Application granted granted Critical
Publication of EP0557154B1 publication Critical patent/EP0557154B1/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
    • F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
    • F42B33/02—Filling cartridges, missiles, or fuzes; Inserting propellant or explosive charges
    • F42B33/0214—Filling cartridges, missiles, or fuzes; Inserting propellant or explosive charges by casting
    • F42B33/0242—Filling cartridges, missiles, or fuzes; Inserting propellant or explosive charges by casting by pressure casting

Definitions

  • the present invention relates to molded explosive charges, in particular the charges formed called hollow charges, providing a high penetrating power.
  • DE-1 207 842 discloses a method for manufacturing a superficial explosive molding consisting in introducing into a chamber a mixture of a solid explosive of suitable particle size and of a solidifiable liquid binder. In order to obtain a high explosive density, while maintaining good homogeneity of the explosive composition, the mixture is subjected to a high pressure by means of a hollow piston, permeable on its front face.
  • This compression-filtration process is repeated in DE-3 529 123 with the modification consisting in providing the permeable piston with a closable opening and in operating the admission of the explosive mixture into several fractions, each followed by compression.
  • the explosive mixture consists for example of octogen (HMX) suspended in molten trinitrotoluene (TNT). We thus manage to improve the regularity of the explosive density along the axis of the mold.
  • the object of the present invention is a method of manufacturing a molded explosive charge which does not have the above drawbacks.
  • the region of the enclosure comprising the calibrated orifices is constituted by a region situated substantially opposite to the part of the enclosure through which the piston passes.
  • the present invention also relates to a device for manufacturing a molded explosive charge comprising an enclosure for receiving a mixture of a solid explosive and a solidifiable liquid binder, and a piston having a front face passing through a part of the enclosure and moving in the latter to compress the solid explosive and to separate the excess binder therefrom, characterized in that the enclosure comprises a region, situated at a distance from the part crossed by the piston, comprising a set of substantially calibrated orifices used to extract the excess binder from the enclosure.
  • the present invention also relates to a molded explosive charge, characterized in that it is produced according to the method of the invention.
  • the present invention finally relates to the application of the above method to the production of a munition comprising a charge body for an explosive charge, characterized in that the explosive charge is formed directly in the charge body by making play the latter the role of part of the enclosure.
  • the device shown diagrammatically in FIG. 1 comprises, at its lower part, a steel tank 1 intended to receive, in a cavity 3, a binder in the liquid state 2, such as trinitrotoluene (TNT).
  • the cavity 3 comprises a branch 5 for supplying binder through a supply tap 7 which can also be used for removing the binder.
  • the valve 7 opening and closing positions are marked with 7 'and 7 "respectively (see Figures 2 and 3).
  • the level of the branch 5 is slightly higher than the level of the plate 9 for reasons which will be explained below, the difference between the two levels being designated by x.
  • a first thermostatic bath 11 is circulated around the cavity 3.
  • a load body 13 made on the basis of carbon fibers and which must constitute a hollow charge ammunition, has a generally cylindrical shape comprising, on either side of a slightly frustoconical central part, a cylindrical lower end 22, and a cylindrical upper end 24.
  • the lower end 22 is fitted directly onto the cavity 3, at the upper end 4 of the latter.
  • the load body 13 forms with the plate 9 an enclosure intended to receive a mixture 14 of a solid explosive, in the form of crystals of hexogen (RDX) or octogen (HMX), and of a liquid binder formed by TNT.
  • RDX hexogen
  • HMX octogen
  • the temperature of the charging body 13 can be adjusted by means of a lower thermal envelope 15 and an upper thermal envelope 17, in each of which passes a copper coil, respectively 16 and 18.
  • the lower coil 16 receives the first bath thermostatic 11 which then circulates in the tank 1.
  • a second thermostatic bath 19 has a temperature close to that of the first bath 11.
  • a piston 21, having a conical front end 29 is connected, at its upper part, to a non-press nose represented.
  • the conical shape of the front end 29 is intended for producing the cavity of a hollow charge.
  • a purge channel 23 connects the periphery of the base of the cone 29 to a purge valve shown diagrammatically at 25.
  • the piston 21 is hollow and has a cavity 27 in which the second thermostatted bath 19 circulates which then passes through the coil 18 before return to the cavity 27. If necessary, a conical metallic coating 31, intended for the hollow charge can be applied against the cone 29 by making the two parts adhere with a film of silicone grease 32.
  • the conical coating 31 against the cone 29 by depression orifices are then arranged on the cone facing the coating and are connected in a known manner to a vacuum pump).
  • the position taken by the coating 31 is shown along the dotted lines 33 when the piston 21 reaches its position bass at the end of compression.
  • the coating has an external diameter substantially equal to the internal diameter of the upper end 24 of the load body 13.
  • a slight notch or a flat of a few tenths of mm is arranged on the periphery of the coating at its largest diameter. This notch or this dish is disposed opposite the purge channel 23 so as to allow the liquid to exit through the purge valve 25 during the descent of the piston as will be described later.
  • the paper filter 10 being placed on the bronze filter plate 9 (see FIG. 2, the load body 13 is put in place. Then the tank 1 is filled with liquid TNT, at a temperature slightly below 100 ° C, by the supply tap in the open position 7 '. The temperature of the TNT is kept substantially constant, at a value T o of between 95 ° C and 100 ° C, by the circulation of the first thermostatically controlled bath 11, this bath then passing through the coil 16 which surrounds the lower part of the load body 13 then returning to the circuit of the tank 1.
  • the casting operation is carried out at atmospheric pressure and without turbulence, from a pouring nozzle 35 pouring onto a ramp 37.
  • the piston 21 After filling the load body, the piston 21 is put in place, the descent of which is effected by the action of the press (not shown) at constant pressure, the purge valve of the piston 21 being in the open position. 25 '(see Figure 4).
  • the piston 21 is guided with precision and enters the load body 13. At this stage, the supply / discharge valve of the tank 1 is still in the closed position 7 ''.
  • the piston 21 having completed its stroke descent, which is fixed by the material of the load to be compressed, the compression pressure is maintained at the same value for about forty minutes, the total duration of compression being approximately 45 minutes.
  • the assembly is gradually cooled by means of the thermostatic baths 11 and 19, the temperature reduction curves of which may or may not be identical depending on the geometric characteristics of the load to be produced.
  • the invention also relates to molded explosive charges with advantageous characteristics arising from the above manufacturing process.
  • the invention relates to an ammunition comprising a charge body such as the body 13 in which a molded explosive charge has been prepared directly by application of the above compression-filtration method of the invention.
  • the complementary parts of the ammunition are then adapted to the load body 13, according to techniques well known in this field, and which it was considered unnecessary to describe.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Press Drives And Press Lines (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Forging (AREA)
EP93400305A 1992-02-17 1993-02-08 Procédé de fabrication d'une charge explosive moulée; dispositif pour sa mise en oeuvre; charge explosive et munition ainsi obtenue Expired - Lifetime EP0557154B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9201766A FR2687467A1 (fr) 1992-02-17 1992-02-17 Procede de fabrication d'une charge explosive moulee; dispositif pour sa mise en óoeuvre; charge explosive et munition ainsi obtenue.
FR9201766 1992-02-17

Publications (2)

Publication Number Publication Date
EP0557154A1 EP0557154A1 (fr) 1993-08-25
EP0557154B1 true EP0557154B1 (fr) 1996-04-10

Family

ID=9426708

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93400305A Expired - Lifetime EP0557154B1 (fr) 1992-02-17 1993-02-08 Procédé de fabrication d'une charge explosive moulée; dispositif pour sa mise en oeuvre; charge explosive et munition ainsi obtenue

Country Status (5)

Country Link
EP (1) EP0557154B1 (enrdf_load_stackoverflow)
DE (1) DE69302116T2 (enrdf_load_stackoverflow)
ES (1) ES2087672T3 (enrdf_load_stackoverflow)
FR (1) FR2687467A1 (enrdf_load_stackoverflow)
NO (1) NO301911B1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010022982B3 (de) * 2010-06-08 2013-09-26 Rheinmetall Waffe Munition Gmbh Druckverstärkende Sprengladung und diese Ladung enthaltende Munition

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3613506C1 (en) * 1986-04-22 1987-07-02 Messerschmitt Boelkow Blohm Method for producing rotationally symmetrical explosive bodies
DE3613507C1 (en) * 1986-04-22 1987-07-02 Messerschmitt Boelkow Blohm Method for producing rotationally symmetrical explosive bodies

Also Published As

Publication number Publication date
ES2087672T3 (es) 1996-07-16
FR2687467A1 (fr) 1993-08-20
NO930549L (no) 1993-08-18
DE69302116D1 (de) 1996-05-15
EP0557154A1 (fr) 1993-08-25
NO930549D0 (no) 1993-02-16
DE69302116T2 (de) 1996-10-02
NO301911B1 (no) 1997-12-22
FR2687467B1 (enrdf_load_stackoverflow) 1994-04-22

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