EP0324371B1 - Initiateur, de préférence à retard de longue durée - Google Patents

Initiateur, de préférence à retard de longue durée Download PDF

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Publication number
EP0324371B1
EP0324371B1 EP89100116A EP89100116A EP0324371B1 EP 0324371 B1 EP0324371 B1 EP 0324371B1 EP 89100116 A EP89100116 A EP 89100116A EP 89100116 A EP89100116 A EP 89100116A EP 0324371 B1 EP0324371 B1 EP 0324371B1
Authority
EP
European Patent Office
Prior art keywords
charge
delay
ignition
reaction
charges
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
EP89100116A
Other languages
German (de)
English (en)
Other versions
EP0324371A3 (en
EP0324371A2 (fr
Inventor
Peter-Josef Grommes
Günther Faber
Hans Dr. Dipl.-Phys. Florin
Peter Dipl.-Phys. Röh
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 EP0324371A2 publication Critical patent/EP0324371A2/fr
Publication of EP0324371A3 publication Critical patent/EP0324371A3/de
Application granted granted Critical
Publication of EP0324371B1 publication Critical patent/EP0324371B1/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
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0815—Intermediate ignition capsules, i.e. self-contained primary pyrotechnic module transmitting the initial firing signal to the secondary explosive, e.g. using electric, radio frequency, optical or percussion signals to the secondary explosive
    • 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
    • F42B3/16—Pyrotechnic delay initiators

Definitions

  • the invention relates to a method for producing an ignition element according to the preamble of claim 1 and to the associated ignition element.
  • An ignition element with a delay line has the task of amplifying the pyrotechnic reaction which occurs when an ignition means is triggered in such a way that it leads to the reliable ignition or ignition of a main charge after a delay time.
  • An ignition element is made up of several pyrotechnic sentences arranged one behind the other.
  • the highly sensitive but weak triggering of an ignition charge should be used after a predetermined time to safely ignite a relatively slow main charge.
  • the weak points of an ignition element at which the passage through the reaction zone can be disturbed or interrupted are the areas where pyrotechnic phrases with different physical and chemical properties collide. At such interfaces, the reaction process breaks off especially when the progress of the reaction is made more difficult by further conditions, such as, for example, very high rotation of the ignition element, low temperatures, vibrations, shocks, shocks and the like. the like
  • the requirement for long delay times is usually accompanied by a decrease in reliability, because the suitable delay sets have such a chemical composition that the desired slow forwarding can only take place reliably if the reaction is initiated optimally in the delay line.
  • an ignition element which corresponds in structure to the ignition element cited in the preamble of claim 1.
  • the sets are introduced into the sleeve from the rear end thereof, i.e. first the sentences determining the detonative or flaming output are introduced, then the delay sentence and finally the ignition sentence with the ignition bridge arranged therein.
  • the ignition charge cannot be pressed inside the sleeve at all, since it contains the ignition bridge. Rather, it is used as a prefabricated component, as a so-called "squib", as the latter together with the sealing plug for the sleeve.
  • squib so-called "squib"
  • US-A-4 005 659 describes an ignition device in which the individual sets are also inserted into the sleeve from the rear end thereof, which has the same disadvantages as the ignition element according to GB-A-933 742 . Otherwise, this ignition device does not have an ignition charge applied to the transmission set, but rather an ignition mixture and a hot particle mixture, which are introduced into a separate, highly heat-conducting metal sleeve. This metal sleeve is then inserted into the transfer set and surrounded by this on its outer surface, so that a good heat transfer from the "red-hot" metal sleeve to the transfer set is achieved during ignition.
  • US-A-3 945 323 further describes a impact and self-destruct ignition device which has an igniter and a delay device arranged at a distance therefrom.
  • the last consists of a separate sleeve in which the actual delay set is accommodated, which is provided with a firing set at its end facing the igniter and with a firing set at its other end.
  • the firing set serves to melt a screw nut fixing the striking piece so that it can move forward under the action of a spring. No information has been given on the manner in which the sentences are inserted into the sleeve.
  • the invention has for its object to improve the method for producing an ignition element according to the preamble of claim 1 so that the progress of the reaction zone in the ignition element is ensured even more reliably, even under difficult external conditions.
  • reaction speed changes very significantly; in a highly sensitive primer it can be of the order of 500 mm / s; in the deceleration set the propagation speed is in the range 0.7 to 1 mm / s; in intermediate transmission sets it is usually between 30 and 200 mm / s. It has been shown that the transfer of the reaction process can lead to difficulties, especially at those interfaces where the Reaction speed of the delay set is no longer so high, ie the speed of propagation of the reaction wave is already relatively low, so that in particular disturbances occur during the transition to the delay set. If the center area of the transmission set that ignites the delay set arches into the first delay set of a delay line, the most obvious result is an increase in reliability.
  • the central bulge of the set that ignites the delay line is preferably conical; but it can also preferably correspond to a spherical segment surface. It is determined by the tool with which the primer is pressed into the cylindrical sleeve. It shows that it can be technically particularly favorable if the central surface area is rounded and the side areas are frustoconical.
  • the design according to the invention of the transition between the sentence that ignites the delay line and the first delay sentence is not only due to the geometric shape described above, but depends crucially on the fact that the curved interface extends over the entire cross section.
  • the priming charge of the propellant charge of a rocket engine is also, for example, among others. conical, but the interface between the primer and the propellant does not cover the entire cross section of the propellant charge. In the method according to the invention, such a geometry of the interface would not lead to reliable functioning - transferring the reaction of the transfer set to the delay set.
  • the ignition element in contrast to FR-A-2 151 495, first the ignition sentence, then preferably at least one transmission sentence and then the at least one delay sentence must be loaded, the ignition sentence or - if present - the transmission sentence and in the case of several Delay sets according to claim 2, preferably also the first delay set can be compressed with a pressing pin with a concave pressing surface. It is only through this manufacturing process, which is unusual per se, that reliable reaction transfer from the primer or transfer set to the delay set is achieved.
  • the essence of the invention is therefore an improvement in the transition between the firing rate and the delay rate.
  • the geometric design of the sentence that ignites the delay sentence or the first of several delay sentences makes the greatest contribution to increasing security.
  • the set that ignites the delay line is either a slow-burning ignition set from the outset, or, particularly preferably, there are at least two transmission sets between the ignition set and the delay line according to claim 3, at least the middle region of the set igniting in the delay line protruding into the first delay set.
  • the choice of substances for the split transfer rates is essentially from the point of view that the jumps in the physical property values at the interfaces become smaller. Such a measure increases the reliability of the ignition element.
  • the breakdown the transfer set into two or more sets with properties changing in smaller increments can also make it possible for the delay set to have properties that are even more desirable per se, such as an even lower reaction speed, but such a material for the delay set So far it was out of the question, because otherwise the transition from the primer to the retarding sentence would have become even more problematic because it was too different.
  • a further improvement is achieved if the otherwise known plane-parallel transmission ranges between the individual delay sets are changed.
  • a change in the range between the first and second delay set is particularly preferred.
  • the individual delay sets are usually chemically and physically identical.
  • the delay line is divided into several sentences only for manufacturing reasons. It means practically no additional effort if the front side of the first deceleration set in the detonation direction is also bulged, which can be done with the same tool. With this measure, a further improvement in reliability is observed.
  • the invention is shown in the drawing and further described by way of example.
  • the figure shows a section through an ignition element with a detonative output.
  • the ignition element consists of a cylindrical sleeve 1 with an outer diameter of 5 mm and a length of 17 mm.
  • the primer consists of a sensitive friction set of high reaction speed, which is ignited with a piercing needle, and in which the reaction zone at a speed of approx. 500 mm / s progresses.
  • the ignition element is designed for relatively long delay times - of the order of 10 s.
  • the response speed in the delay line is less than 0.8 mm / s.
  • the delay line consists of four chemically and physically identical sets 3, 4, 5, 6.
  • the transmission line here consists of two sets 7, 8, which differ in chemical composition and which are coordinated with one another in such a way that the levels of the property values depend on the interfaces are as small as possible.
  • the design of the transition region according to the invention or the design of the bottom surface of the usually cylindrical sets is used.
  • the area between the transmission set 8 and the first delay set 3 is regarded as the most important transition area.
  • the transition area from the first delay set 3 to the second delay set 4 also has the same shape. This second arched transition would not be absolutely necessary due to the same composition of sentences 3 and 4.
  • the output of the ignition element is carried out in a known manner.
  • the last delay set 6 is followed by a lead azide charge 9 and a PETN charge 10, which is covered with an aluminum plate 11.
  • the last layer 12 consists of a sealing lacquer.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Led Devices (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Electrical Control Of Ignition Timing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Gas-Filled Discharge Tubes (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Dental Preparations (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Claims (4)

  1. Procédé de fabrication d'un allumeur, de préférence à retard de longue durée, comportant une enveloppe cylindrique (1) avec une extrémité antérieure et une extrémité postérieure dans laquelle sont disposées en couches successives au moins une charge d'allumage (2) et une ligne de retard formée d'au moins une charge retardatrice (3), la charge d'allumage qui met à feu la charge retardatrice (3) pénétrant par sa partie centrale dans ladite charge retardatrice (3) et l'extrémité antérieure du fourreau (1) étant agencée sous forme de sortie à à détonation ou de sortie de flamme, caractérisé par le fait que l'on introduit avec pression dans l'enveloppe (1) depuis l'extrémité antérieure de celle-ci jusqu'à son extrémité postérieure tout d'abord la charge d'allumage (2) au nombre d'au moins une, éventuellement au moins une charge relais (8), puis les autres charges (3, 4, 5, 6, 9, 10) et que l'on procède au tassement de la charge (2, 8) d'allumage de la charge retardatrice (3), ou de la première charge retardatrice dans le cas de plusieurs charges retardatrices, au moyen d'un piston de tassement à surface frontale concave.
  2. Procédé selon la revendication 1, caractérisé par le fait qu'en outre on tasse avec un piston de tassement à surface frontale concave au moins la charge retardatrice (3) ou la première charge retardatrice dans le cas de plusieurs charges retardatrices.
  3. Allumeur fabriqué conformément au procédé selon la revendication 1 ou la revendication 2, caractérisé par le fait que la charge d'allumage de la charge retardatrice (3) ou de la première charge retardatrice de la ligne de retard (3, 4, 5, 6) est constituée par une charge relais (8) qui est disposée entre la charge d'allumage (2) et la charge retardatrice (3) et pénètre par sa partie centrale dans ladite charge retardatrice (3), et par le fait qu'au moins une charge relais (7) supplémentaire est disposée entre la charge d'allumage (2) et la charge relais (8) et que les charges relais (7, 8) sont constituées de composants tels que les écarts entre les caractéristiques, en particulier la vitesse de réaction, diminuent au niveau des interfaces des charges pressées les unes contre les autres (2, 7, 8) ou de la charge retardatrice (3).
  4. Allumeur selon la revendication 3, caractérisé par le fait qu'au moins la première charge retardatrice (3) de la ligne de retard (3, 4, 5, 6,) pénètre par sa partie centrale dans la charge retardatrice (4) suivante.
EP89100116A 1988-01-09 1989-01-05 Initiateur, de préférence à retard de longue durée Expired - Lifetime EP0324371B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3800455 1988-01-09
DE3800455A DE3800455A1 (de) 1988-01-09 1988-01-09 Zuendelement, vorzugsweise mit langer verzoegerungszeit

Publications (3)

Publication Number Publication Date
EP0324371A2 EP0324371A2 (fr) 1989-07-19
EP0324371A3 EP0324371A3 (en) 1989-11-02
EP0324371B1 true EP0324371B1 (fr) 1995-03-15

Family

ID=6345021

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89100116A Expired - Lifetime EP0324371B1 (fr) 1988-01-09 1989-01-05 Initiateur, de préférence à retard de longue durée

Country Status (10)

Country Link
US (2) US5054396A (fr)
EP (1) EP0324371B1 (fr)
AT (1) ATE119994T1 (fr)
DE (2) DE3800455A1 (fr)
DK (1) DK4989A (fr)
ES (1) ES2068839T3 (fr)
GR (1) GR3015433T3 (fr)
IL (1) IL88897A (fr)
NO (1) NO170865C (fr)
TR (1) TR25126A (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2754051B3 (fr) * 1989-03-20 1999-01-22 Breed Automotive Tech Amorce/detonateur stable a haute temperature et a faible demande d'energie, et procede pour son obtention
US5187319A (en) * 1990-09-20 1993-02-16 Societe Nationale Des Poudres Et Explosifs Low vulnerability component of explosive ammunition and process for initiating a charge of low-sensitivity composite explosive
IL96684A0 (fr) * 1990-12-16 1991-09-16
US5204492A (en) * 1991-10-30 1993-04-20 Ici Explosives Usa Inc. Low noise, low shrapnel detonator assembly for initiating signal transmission lines
FR2704944B1 (fr) * 1993-05-05 1995-08-04 Ncs Pyrotechnie Technologies Initiateur électro-pyrotechnique.
IL108452A0 (en) * 1994-01-27 1994-11-11 Feigelson Leonid Autonomous electric detonator
DE10057673A1 (de) * 2000-11-21 2002-05-23 Rheinmetall W & M Gmbh Gefechtskopf
US6739264B1 (en) * 2002-11-04 2004-05-25 Key Safety Systems, Inc. Low cost ignition device for gas generators
WO2008074037A2 (fr) * 2006-12-11 2008-06-19 African Explosives Limited Élément de temporisation rigide
US8776689B2 (en) * 2011-03-25 2014-07-15 Vincent Gonsalves Energetics train reaction and method of making an intensive munitions detonator

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2560452A (en) * 1947-06-04 1951-07-10 Canadian Ind Delay compositions for electric blasting caps
US2717204A (en) * 1952-05-02 1955-09-06 Du Pont Blasting initiator composition
US2878752A (en) * 1956-12-05 1959-03-24 Du Pont Blasting initiator
GB933742A (en) * 1960-12-09 1963-08-14 Canadian Ind Slow burning delay device
FR1285413A (fr) * 1961-01-13 1962-02-23 Davey Bickford Smith & Cie Sa Détonateurs électriques à temps
FR1400588A (fr) * 1964-04-14 1965-05-28 Elément de retard pour détonateurs électriques
US3372643A (en) * 1966-02-01 1968-03-12 United Shoe Machinery Corp Low explosive primerless formed charges
FR1576201A (fr) * 1967-08-17 1969-07-25
US3688702A (en) * 1969-08-12 1972-09-05 Dynamit Nobel Ag Detonator device for explosive charge exhibiting detonating effect capable of bridging gap between spaced charges
FR2046583A5 (en) * 1970-04-29 1971-03-05 Explosifs Produits Chimi Delay action layers for detonators
US3945323A (en) * 1974-06-14 1976-03-23 The United States Of America As Represented By The Secretary Of The Army Impact and self-destruct fuze
US4005659A (en) * 1975-08-20 1977-02-01 Calspan Corporation Impact actuated projectile fuze
DE2852358C2 (de) * 1978-12-04 1986-09-11 Dynamit Nobel Ag, 5210 Troisdorf Verfahren zur Herstellung von gepreßten Sprengkörpern für Munition oder Sprengladungen, insbesondere großen Kalibers
US4335652A (en) * 1979-02-26 1982-06-22 E. I. Du Pont De Nemours & Company Non-electric delay detonator
US4369708A (en) * 1979-09-21 1983-01-25 E. I. Du Pont De Nemours And Company Delay blasting cap
US4386567A (en) * 1981-07-28 1983-06-07 The United States Of America As Represented By The Secretary Of The Army Combination percussion-electric primer
DE8406393U1 (de) * 1984-03-01 1985-07-04 Diehl GmbH & Co, 8500 Nürnberg Pyrotechnisches Verzögerungsbauteil
CA1259855A (fr) * 1986-06-26 1989-09-26 Ghislain M. Dumas Dispositif de temporisation du parti pyrotechnique sous des conditions d'acceleration extreme

Also Published As

Publication number Publication date
DK4989D0 (da) 1989-01-06
IL88897A0 (en) 1989-08-15
NO890058L (no) 1989-07-10
DK4989A (da) 1989-07-10
GR3015433T3 (en) 1995-06-30
NO170865C (no) 1992-12-16
US5054396A (en) 1991-10-08
IL88897A (en) 1994-10-21
EP0324371A3 (en) 1989-11-02
EP0324371A2 (fr) 1989-07-19
ATE119994T1 (de) 1995-04-15
TR25126A (tr) 1992-10-01
ES2068839T3 (es) 1995-05-01
DE3800455A1 (de) 1989-07-20
NO890058D0 (no) 1989-01-06
NO170865B (no) 1992-09-07
DE58909103D1 (de) 1995-04-20
US5125335A (en) 1992-06-30

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