EP1101076B1 - Procede de mise en oeuvre d'une substance pyrotechnique et initiateur pyrotechnique obtenu avec un tel procede - Google Patents
Procede de mise en oeuvre d'une substance pyrotechnique et initiateur pyrotechnique obtenu avec un tel procede Download PDFInfo
- Publication number
- EP1101076B1 EP1101076B1 EP99934807A EP99934807A EP1101076B1 EP 1101076 B1 EP1101076 B1 EP 1101076B1 EP 99934807 A EP99934807 A EP 99934807A EP 99934807 A EP99934807 A EP 99934807A EP 1101076 B1 EP1101076 B1 EP 1101076B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pyrotechnic
- substance
- binder
- resin
- initiator
- 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
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- 239000000126 substance Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000003999 initiator Substances 0.000 title claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 43
- 239000000203 mixture Substances 0.000 claims abstract description 42
- 239000011230 binding agent Substances 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 230000005855 radiation Effects 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 235000011837 pasties Nutrition 0.000 claims abstract description 10
- 238000011065 in-situ storage Methods 0.000 claims abstract description 5
- 239000011347 resin Substances 0.000 claims description 31
- 229920005989 resin Polymers 0.000 claims description 31
- 230000000977 initiatory effect Effects 0.000 claims description 23
- 239000002360 explosive Substances 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 10
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 10
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 8
- 229910052726 zirconium Inorganic materials 0.000 claims description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 6
- 229910052796 boron Inorganic materials 0.000 claims description 6
- 229920000178 Acrylic resin Polymers 0.000 claims description 4
- 239000004925 Acrylic resin Substances 0.000 claims description 4
- AXZAYXJCENRGIM-UHFFFAOYSA-J dipotassium;tetrabromoplatinum(2-) Chemical compound [K+].[K+].[Br-].[Br-].[Br-].[Br-].[Pt+2] AXZAYXJCENRGIM-UHFFFAOYSA-J 0.000 claims description 4
- 235000010333 potassium nitrate Nutrition 0.000 claims description 4
- 239000004323 potassium nitrate Substances 0.000 claims description 4
- 229910001487 potassium perchlorate Inorganic materials 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 229920005749 polyurethane resin Polymers 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 239000000025 natural resin Substances 0.000 claims description 2
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims 1
- 238000002329 infrared spectrum Methods 0.000 claims 1
- 239000000843 powder Substances 0.000 abstract description 5
- 238000006116 polymerization reaction Methods 0.000 description 14
- 239000004065 semiconductor Substances 0.000 description 10
- -1 dinitro benzo furoxane salt Chemical class 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 238000011068 loading method Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- WETZJIOEDGMBMA-UHFFFAOYSA-L lead styphnate Chemical compound [Pb+2].[O-]C1=C([N+]([O-])=O)C=C([N+]([O-])=O)C([O-])=C1[N+]([O-])=O WETZJIOEDGMBMA-UHFFFAOYSA-L 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 231100000956 nontoxicity Toxicity 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 150000001540 azides Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- YLMGFJXSLBMXHK-UHFFFAOYSA-M potassium perchlorate Chemical compound [K+].[O-]Cl(=O)(=O)=O YLMGFJXSLBMXHK-UHFFFAOYSA-M 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- QBFXQJXHEPIJKW-UHFFFAOYSA-N silver azide Chemical compound [Ag+].[N-]=[N+]=[N-] QBFXQJXHEPIJKW-UHFFFAOYSA-N 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 201000005569 Gout Diseases 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 238000003848 UV Light-Curing Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001976 improved effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000002165 photosensitisation Effects 0.000 description 1
- 239000003504 photosensitizing agent Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
- F42B3/195—Manufacture
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
- F42B3/12—Bridge initiators
- F42B3/124—Bridge initiators characterised by the configuration or material of the bridge
Definitions
- the field of the present invention is that of processes for using pyrotechnic substances for make a pyrotechnic component.
- Such a component generally includes a substance pyrotechnic sensitive to shock or overheating (explosive primary) which is intended to initiate a composition reinforcing pyrotechnic (flame for an igniter or shock for a detonator).
- This primary explosive may be mixed with the reinforcing composition (as in patents EP600791 and FR2720493) or adjacent to it (as in the patent GB960186).
- the sensitive substance most often includes a primary explosive, such as lead trinitroresorcinate, lead azide or silver azide.
- a primary explosive such as lead trinitroresorcinate, lead azide or silver azide.
- Electrical initiation pyrotechnic components use a resistive element, such as a hot wire or a semiconductor wafer.
- the loading of a pulverulent material involves a minimum of filling of the bottom of the cell of the component to completely cover the resistive element. This results in an overabundant placement of the substance primary which penalizes both the manufacturing cost and Security.
- Another known mode of implementation provides for carrying out a suspension of the sensitive pyrotechnic substance in a liquid solvent in which a binder (of active type or not) is dissolved.
- the usual solvents are water, alcohol or acetone. Solvent is removed by heating or drying after setting up the composition.
- the resistive element is now produced in the form of a semiconductor bridge, the dimensions of the resistive bridge are therefore very small (around 50 micrometers x 150 micrometers) and it therefore becomes essential to use a sensitive pyrotechnic substance which is of a particle size very fine, less than the dimensions of the bridge (grain size less than 50 micrometers).
- Patent application EP-0 864 843 describes a process a process for using a substance pyrotechnic
- Patent EP-A-0 340 761 describes a method of propellant charge for ammunition consisting of suspending the explosive in a binder inert curable and put the pasty material obtained in the socket. This patent does not concern a composition of initiation.
- the invention proposes a method of implementation a pyrotechnic substance which allows both reduce the risks for the personnel attached to its manufacturing and reduce the costs of making pyrotechnic components such as initiators.
- the method according to the invention also makes it possible to define a pyrotechnic component for security systems automobile whose reliability is improved and whose non toxicity is assured.
- the subject of the invention is a method of implementing work of at least one pyrotechnic substance to achieve a pyrotechnic component, in particular a bridge initiator resistive, according to which we first put the substance powdery pyrotechnics suspended in a binder inert, liquid or pasty, and liable to harden by polymerization and then we put the pyrotechnic material as well formed in place in a liquid or pasty state in the component, characterized in that at least polymerizes partially in situ the material by radiation or bombardment to harden the binder carrying the pyrotechnic substances, the polymerization being supplemented by heating the composition.
- the binder will be chosen so to be polymerized at least partially by radiation ultraviolet.
- the composition can be heated by an oven.
- the binder may be constituted by a resin photosensitive based on natural or synthetic resin, the base resin can then be chosen from resins following: acrylic resin, polyurethane resin.
- the substance pyrotechnics may include at least one explosive primary.
- the pyrotechnic substance include as primary explosive a dinitro-benzo-furoxane salt.
- the pyrotechnic material may comprise 40 to 60% in mass of pyrotechnic substance suspended in 60% at 40% by mass of resin.
- a resistive element of a pyrotechnic initiator some of the pyrotechnic material liquid or pasty then harden the binder by subjecting this material to ultraviolet radiation associated with heating.
- the heating temperature will be chosen lower than 140 ° C, and preferably between 80 ° C and 100 ° C.
- the invention also relates to an initiator resistive element pyrotechnic using at least one pyrotechnic substance thus implemented initiator which is characterized in that the resistive element is totally covered by a pyrotechnic initiation material formed of the pyrotechnic substance (s) incorporated in a binder inert cured by radiation polymerization ultraviolet associated with heating.
- This pyrotechnic initiator may include a pyrotechnic composition arranged in contact with the material initiation pyrotechnics and compressed on it.
- the resistive element may be a bridge semi conductor.
- the average particle size of the pyrotechnic substance will then be less than or equal to 50 micrometers.
- the pyrotechnic substance incorporated into the binder will be preferably a dinitro benzo furoxane salt, for example potassium dinitro benzo furoxanate.
- the pyrotechnic composition may be chosen from the following compositions: Zirconium / perchlorate potassium, boron / potassium nitrate.
- an initiator 1 pyrotechnic according to the invention comprises a housing 2 metallic (e.g. stainless steel) on which is produced a plastic molding 3 of the type polyamide or polycarbonate.
- the housing 2 is closed by a plug 4 also in plastic material.
- the housing 2 comprises a cylindrical wall 5 welded to a bottom 6 which is completely traversed by an electrode 7a and partially by an electrode 7b.
- the electrode 7b is in electrical contact with the bottom 6 and the electrode 7a is electrically isolated from the bottom by a insulating sleeve 8 (for example made of glass).
- a semiconductor wafer 14 is formed of a insulating substrate 9 based on undoped silicon which is bonded on the bottom 6.
- This plate has a serial bridge conductor 10 (for example doped silicon) which is partially covered by two conductive pads 11a, 11b, for example aluminum.
- the spacing between the studs is between 60 and 100 micrometers and preferably of the order of 80 micrometers.
- the stud 11b is connected to the electrode 7a by a connecting wire 12 fixed by welding.
- the stud 11a is connected to the electrode 7b by through the metal bottom 6 through a well semiconductor 13 (doped silicon) which crosses the substrate insulator 9.
- a pyrotechnic material initiation 15 (which is therefore sensitive to overheating) is deposited on the wafer 14 and also covers the wire 12 and the welds.
- This pyrotechnic material consists of at minus a powdery pyrotechnic substance mixed with a hardened inert binder.
- the average particle size of the pyrotechnic substance will be chosen of the same order of magnitude as the dimensions of the semiconductor bridge. Such an arrangement ensures thermal transfer by convection and / or projection during the rise in temperature of the semiconductor bridge. We thus ensures reliable initiation of the substance pyrotechnic by the resistive bridge.
- the bridge generally has dimensions of the order of 50 micrometers x 150 micrometers. We will therefore adopt for the composition a particle size less than or equal to 50 micrometers.
- the inert binder chosen will be at room temperature a liquid or paste and will likely harden by in situ polymerization.
- the material 15 formed of the binder carrying the pyrotechnic substance covers and protects at the same time mechanically and chemically the wafer 14 as well as the wire 12 and its welds.
- a reinforcing pyrotechnic composition 16 fills the whole case 2. It is therefore in contact with the initiation pyrotechnic material 15 and can be initiated by the latter.
- the pyrotechnic composition may be compressed in the housing, in particular through the plug 4.
- the material 15 protects the resistive bridge as well as the plate, wire and solders which cannot therefore be deteriorated.
- the process for using the substance pyrotechnic according to the invention makes it possible to obtain the material initiation pyrotechnics 15.
- a first step we mix the pulverulent pyrotechnic substances with the inert binder.
- a primary explosive for example trinitrorésorcinate lead, lead azide, azide silver, or a dinitro benzo furoxane salt such as potassium dinitro benzo furoxanate (or KDNBF).
- a primary explosive for example trinitrorésorcinate lead, lead azide, azide silver, or a dinitro benzo furoxane salt such as potassium dinitro benzo furoxanate (or KDNBF).
- Dinitro benzo furoxane salts will be preferred because of their non-toxicity (absence of lead or metals heavy).
- the polymerizable binder will be chosen compatible chemically with the primary explosive (s) used (not inducing a reaction with it during the phases of aging).
- the binder will preferably be chosen from among the photosensitive resins (which incorporate in a known manner a photosensitizing) and which are made from resins syntheses. These resins are therefore (depending on the choice made) polymerizable by radiation (ultraviolet, X, microwave) or by bombardment (electronic).
- Photosensitive resins are known and available commercially and we can especially choose a resin photosensitive, the base resin of which will be chosen from following resins: acrylic resin, epoxy resin, resin polyurethane, silicone resin, polyester resin, resin anaerobic (resin which polymerizes only in the absence of air).
- the viscosity of the binder will be chosen according to the characteristics of the system for depositing the material in the component. We prefer rather liquid resins for facilitate material distribution.
- binder / pyrotechnic substance primary will be chosen by the skilled person according to the desired sensitivity for the final material and that of the primary explosive used. We can adopt proportions between 40% and 60% by mass for the pyrotechnic substance and 60% and 40% by mass for the binder. An equal 50/50 proportion may be adopted.
- a first advantage of this first stage of implementation work is that the primary explosive whose particle size is extremely fine is coated with a binder which desensitizes. The conservation of the material can thus be protected from light (to prevent hardening) and safely.
- a second advantage of this implementation is that the liquid or pasty mixture (depending on the viscosity of the resin used) can be easily distributed mechanically in the case of the pyrotechnic component to be produced, for example at using a syringe or worm hopper (second step of the process).
- a third advantage is that it is possible with the process according to the invention to minimize the amount of primary pyrotechnic substance with reduced particle size arranged in each component while precisely dosing said quantity.
- this is hardened by polymerization (3 ° step).
- a source of commercial ultraviolet radiation (wavelength 365 nanometers), which will be placed at a distance from the material of 20 to 35 mm.
- a lamp reference Pk102 produced by the company Fisnar. This lamp has a power 400 W, it radiates in the Ultraviolet range between 320 nanometers and 390 nanometers and also provides heating temperature from 100 ° to 40mm distance.
- the exposure time of the material will be easily determined depending on the characteristics of the resin chosen and the total mass to be polymerized. This exposure time is for example less than 10 minutes for a massage of around 1.1 mg of material (deposited drop thickness of approximately 1 mm).
- the infrared thus heat the composition (or post cooking) which will cause the complete polymerization of the composition.
- UV exposure consumes energy and imposes precautions from the point of view of implementation by personnel (protective covers).
- the polymerization will supplemented by baking in the oven at a temperature of 80 ° C at 100 ° C for about 10 minutes.
- the heating means will be chosen from so as not to overheat the component pyrotechnic so as not to initiate it (generally the rate temperature rise should be less than 0.5 ° C / second), the oven temperature or that provided by the unfiltered UV source should not exceed 140 ° C.
- a material has thus been produced pyrotechnic combining 53% by mass (or 0.54 mg) of a polyurethane resin with 110 centipoise viscosity with 47% mass of KDNBF (i.e. 0.48 mg).
- the resin is a resin of the 602 series produced by UVEXS Incorporated (580 North Pastoria Sunnyvale Avenue California).
- UV curing under operating conditions previously described led to solidification of the pyrotechnic material on the deck resistive semiconductor.
- the initiators made were then loaded with 120 mg of a pyrotechnic composition 16 combining Zirconium and potassium perchlorate in the classic proportions of 60% by mass of Zirconium for 40% by mass of perchlorate.
- the initiation tests conducted made it possible to measure an initiation time Tf of less than 500 microseconds and an outlet pressure of the component greater than 5 MPa (tests conducted in a 3 cm 3 pressure bomb with an initiation current intensity 1.5 amps No misfire was found for 50 components tested.
- This component uses only 1.1 milligrams of initiation pyrotechnic material. Performances obtained are however similar to those of a component classic in which almost 30 milligrams of a lead styphnate powder initiation composition are used and associated with 50 mg of reinforcing composition Boron / potassium nitrate.
- the resin is a resin reference 30-23 produced by the company Loxeal srl (via Gioberti 20031 Cesano Maderno (Italy)).
- the polymerization was also carried out as experimental with the unfiltered UV source described previously to ensure core polymerization (exposure for 10 minutes).
- the initiators made were then loaded with 120 mg of a pyrotechnic composition 16 combining Zirconium and potassium perchlorate in the classic proportions of 60% by mass of Zirconium for 40% by mass of perchlorate.
- the initiation tests conducted also made it possible to measure an initiation time Tf of less than 500 microseconds and an outlet pressure of the component greater than 5 MPa (tests conducted in a 3 cm 3 pressure can with a current intensity of initiation of 1.5 amps No misfire was found for 50 components tested.
- This component uses only 6 milligrams of initiation pyrotechnic material. Performances obtained are however similar to those of a component classic in which almost 30 milligrams of a lead styphnate powder initiation composition are used and associated with 50 mg of reinforcing composition Boron / potassium nitrate.
- the mass of composition used is higher (6mg versus 1.1mg in the first example).
- the gout volume is also greater and improves protection of the resistive element (in particular of the wire connection and soldering. This increases reliability.
- a pyrotechnic material incorporating a dinitro benzo furoxane salt explosive lead-free primer
- a pyrotechnic composition lead-free energy such as Zirconium (60%) / perchlorate potassium (40%) or Boron (25%) / nitrate potassium (75%)).
- Dinitro benzo furoxane salts are interesting because of their non-toxicity, but they have the disadvantages of being expensive and not very energetic. Thanks to the invention it is possible to minimize the necessary quantity of this explosive in the form of a suspension in a drop of solidifiable binder (less than 1 mg of primary explosive) which is in intimate contact with the resistive bridge. Its low energy level is nevertheless sufficient to allow the initiation of the composition Zr / KClO 4 or B / KNO 3 which in its industrial form (high particle size and coating) cannot be initiated directly by the semiconductor bridge.
- the structure of the initiator (shape of the housing, cap, presence or not of overmolding) can of course be different.
- the method according to the invention makes it possible to simplify and make safer the manufacturing of components while protecting the resistive element from mechanical stresses suffered in particular during the compression of the pyrotechnic composition.
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Description
Claims (17)
- Procédé de mise en oeuvre d'au moins une substance pyrotechnique pour réaliser un composant pyrotechnique, notamment un initiateur à pont résistif, dans lequel on met tout d'abord au moins une substance pyrotechnique pulvérulente en suspension dans un liant inerte, liquide ou pâteux, et susceptible de durcir par polymérisation, et on met le matériau pyrotechnique ainsi formé en place à l'état liquide ou pâteux dans le composant, procédé caractérisé en ce qu'on polymérise au moins partiellement in situ le matériau par rayonnement ou bombardement pour durcir le liant portant la ou les substances pyrotechniques, la polymérisation étant complétée par un chauffage de la composition.
- Procédé de mise en oeuvre selon la revendication 1, caractérisé en ce que le liant est polymérisé au moins partiellement par rayonnement ultraviolet.
- Procédé de mise en oeuvre selon la revendication 2, caractérisé en ce qu'on choisit une source ultraviolet émettant également dans le domaine infrarouge, source qui assure ainsi le chauffage de la composition.
- Procédé de mise en oeuvre selon une des revendications 1 ou 2, caractérisé en ce que le chauffage de la composition est assuré par un four.
- Procédé de mise en oeuvre selon une des revendications 1 ou 2, caractérisé en ce que le liant est constitué par une résine photosensible à base de résine naturelle ou de synthèse.
- Procédé de mise en oeuvre selon la revendication 5, caractérisé en ce que le liant est une résine photosensible dont la résine de base est choisie parmi les résines suivantes : résine acrylique, résine polyuréthanne.
- Procédé de mise en oeuvre selon une des revendications 1 à 6, caractérisé en ce que la substance pyrotechnique comporte au moins un explosif primaire.
- Procédé de mise en oeuvre selon la revendication 7, caractérisé en ce que la substance pyrotechnique comporte comme explosif primaire un sel de dinitro-benzo-furoxane.
- Procédé selon une des revendications 6 à 8, caractérisé en ce que le matériau pyrotechnique comporte 40 à 60% en masse de substance pyrotechnique en suspension dans 60% à 40% en masse de résine.
- Procédé selon une des revendications 1 à 9, caractérisé en ce que on dépose sur un élément résistif d'un initiateur pyrotechnique une part du matériau pyrotechnique liquide ou pâteux, puis on procède au durcissement du liant en soumettant ce matériau à un rayonnement ultraviolet associé à un chauffage.
- Procédé de mise en oeuvre selon une des revendications 1 à 10, caractérisé en ce que la température de chauffage est inférieure à 140°C, et de préférence comprise entre 80°C et 100°C.
- Initiateur pyrotechnique (1) à élément résistif utilisant au moins une substance pyrotechnique mise en oeuvre suivant le procédé des revendications 1 à 11, caractérisé en ce que l'élément résistif (10) est totalement recouvert par un matériau pyrotechnique d'initiation (15) formé de la ou des substances pyrotechniques incorporées dans un liant inerte durci par polymérisation par un rayonnement ultraviolet associé à un chauffage.
- Initiateur pyrotechnique selon la revendication 12, caractérisé en ce qu'il comporte une composition pyrotechnique (16) disposée au contact du matériau pyrotechnique d'initiation (15) et comprimée sur celui-ci.
- Initiateur pyrotechnique selon une des revendications 12 ou 13, caractérisé en ce que l'élément résistif est un pont semi conducteur (10).
- Initiateur pyrotechnique selon la revendication 14, caractérisé en ce que la granulométrie moyenne de la substance pyrotechnique est inférieure ou égale à 50 micromètres.
- Initiateur pyrotechnique selon une des revendications 13 à 15, caractérisé en ce que la substance pyrotechnique incorporée au liant est un sel de dinitro benzo furoxane, par exemple le dinitro benzo furoxanate de potassium.
- Initiateur pyrotechnique selon la revendication 16, caractérisé en ce que la composition pyrotechnique est choisie parmi les compositions suivantes : Zirconium/perchlorate de potassium, Bore/nitrate de potassium.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9809905A FR2781878B1 (fr) | 1998-07-31 | 1998-07-31 | Procede de mise en oeuvre d'une substance pyrotechnique et initiateur pyrotechnique obtenu avec un tel procede |
| FR9809905 | 1998-07-31 | ||
| PCT/FR1999/001872 WO2000008412A1 (fr) | 1998-07-31 | 1999-07-29 | Procede de mise en oeuvre d'une substance pyrotechnique et initiateur pyrotechnique obtenu avec un tel procede |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1101076A1 EP1101076A1 (fr) | 2001-05-23 |
| EP1101076B1 true EP1101076B1 (fr) | 2003-05-28 |
Family
ID=9529310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99934807A Expired - Lifetime EP1101076B1 (fr) | 1998-07-31 | 1999-07-29 | Procede de mise en oeuvre d'une substance pyrotechnique et initiateur pyrotechnique obtenu avec un tel procede |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1101076B1 (fr) |
| AT (1) | ATE241796T1 (fr) |
| DE (1) | DE69908372T2 (fr) |
| ES (1) | ES2195592T3 (fr) |
| FR (1) | FR2781878B1 (fr) |
| WO (1) | WO2000008412A1 (fr) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2809806B1 (fr) * | 2000-05-30 | 2003-01-10 | Livbag Snc | Initiateur electro-pyrotechnique a pont en couche mince et a tres basse energie de fonctionnement |
| RU2202097C2 (ru) * | 2001-06-13 | 2003-04-10 | Бокшанский Василий Болеславович | Способ инициирования зарядов |
| FR2833693B1 (fr) * | 2001-12-14 | 2004-03-12 | Livbag Snc | Procede de realisation d'un initiateur electro-pyrotechnique par emploi d'une colle aqueuse |
| US6941867B2 (en) * | 2002-07-01 | 2005-09-13 | Special Devices, Inc. | Initiator with a slip plane between an ignition charge and an output charge |
| FR2877720B1 (fr) * | 2004-11-05 | 2009-11-06 | Davey Bickford Snc | Procede de realisation d'une interface electropyrotechnique entre un pont electrothermique et une composition primaire au sein d'un initiateur, initiateur obtenu |
| FR2944348A1 (fr) | 2009-04-10 | 2010-10-15 | Nexter Munitions | Dispositif de mise a feu de munition par percussion |
| RU2427786C1 (ru) * | 2010-02-24 | 2011-08-27 | Федеральное государственное унитарное предприятие "Российский Федеральный ядерный центр - Всероссийский научно-исследовательский институт экспериментальной физики" (ФГУП "РФЯЦ - ВНИИЭФ") | Детонатор на основе светочувствительного взрывчатого вещества |
| AT510474B1 (de) * | 2010-09-30 | 2013-11-15 | Electrovac Metall Glaseinschmelzungs Gmbh | Lötverbindung |
| DE102019116464A1 (de) * | 2019-06-18 | 2020-12-24 | NEFZER SPECIAL EFFECTS GmbH | Filmeffektzünder und Verfahren zum Herstellen |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB960186A (en) | 1961-10-19 | 1964-06-10 | Bendix Corp | Electrically triggered squib |
| NL133269C (fr) * | 1962-05-10 | |||
| US3906858A (en) * | 1974-07-30 | 1975-09-23 | Us Eneregy Research And Dev Ad | Miniature igniter |
| DE2809279C3 (de) * | 1978-03-03 | 1980-11-27 | Deutsch-Franzoesisches Forschungsinstitut Saint-Louis, Saint-Louis (Frankreich) | Treibladungsmassen für Rohrwaffen |
| FR2714457A1 (fr) * | 1984-01-27 | 1995-06-30 | Poudres & Explosifs Ste Nale | Tête à aérosol explosif. |
| DE3815436A1 (de) * | 1988-05-06 | 1989-11-16 | Muiden Chemie B V | Treibladungen fuer grosskalibrige geschosse |
| FR2698687B1 (fr) | 1992-12-01 | 1995-02-03 | Giat Ind Sa | Initiateur pyrotechnique. |
| US5728964A (en) * | 1993-10-20 | 1998-03-17 | Quantic Industries, Inc. | Electrical initiator |
| FR2720493B1 (fr) | 1994-05-31 | 1996-07-19 | Giat Ind Sa | Initiateur pyrotechnique. |
| US5939660A (en) * | 1997-03-12 | 1999-08-17 | Trw Inc. | Inflator for an inflatable vehicle occupant protection device |
-
1998
- 1998-07-31 FR FR9809905A patent/FR2781878B1/fr not_active Expired - Fee Related
-
1999
- 1999-07-29 ES ES99934807T patent/ES2195592T3/es not_active Expired - Lifetime
- 1999-07-29 EP EP99934807A patent/EP1101076B1/fr not_active Expired - Lifetime
- 1999-07-29 DE DE69908372T patent/DE69908372T2/de not_active Expired - Fee Related
- 1999-07-29 AT AT99934807T patent/ATE241796T1/de not_active IP Right Cessation
- 1999-07-29 WO PCT/FR1999/001872 patent/WO2000008412A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE69908372T2 (de) | 2004-04-01 |
| FR2781878B1 (fr) | 2001-02-16 |
| ES2195592T3 (es) | 2003-12-01 |
| DE69908372D1 (de) | 2003-07-03 |
| WO2000008412A1 (fr) | 2000-02-17 |
| ATE241796T1 (de) | 2003-06-15 |
| EP1101076A1 (fr) | 2001-05-23 |
| FR2781878A1 (fr) | 2000-02-04 |
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