EP0847972B1 - Pyrotechnisches Verzögerungselement, Verfahren zu seiner Herstellung sowie dessen Verwendung - Google Patents
Pyrotechnisches Verzögerungselement, Verfahren zu seiner Herstellung sowie dessen Verwendung Download PDFInfo
- Publication number
- EP0847972B1 EP0847972B1 EP96203536A EP96203536A EP0847972B1 EP 0847972 B1 EP0847972 B1 EP 0847972B1 EP 96203536 A EP96203536 A EP 96203536A EP 96203536 A EP96203536 A EP 96203536A EP 0847972 B1 EP0847972 B1 EP 0847972B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- delay
- charge
- pressed
- delay element
- binder14
- 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
Links
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Classifications
-
- 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
- C06B21/0041—Shaping the mixture by compression
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C5/00—Fuses, e.g. fuse cords
- C06C5/06—Fuse igniting means; Fuse connectors
-
- 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 pyrotechnic delay element according to the preamble of claim 1 or 2.
- Such a delay element is i.a. known from the EP-A1- 0 036 810 and is based on conventional pollutants producing pyrotechnic mixtures.
- the igniter charge is encapsulated with polymers; the delay rate is made in granular or encapsulated form. This requires a relatively high ignition energy, which passes through one Percussion igniter is applied.
- EP-A1-0 304 973 is also used for ignition with a firing pin suitable pyrotechnic Delay element known. This contains in the cheering and Delay rate toxic heavy metal compounds, which in manufacturing and in their application because of their Emissions and residues are undesirable.
- this delay element In addition to its toxicity, this delay element has the Disadvantage that it also requires a relatively high ignition energy.
- the Delay times should be predeterminable in the range of seconds and be reproducible.
- the delay element is said to be are also particularly suitable for igniting mist ammunition and have only small dimensions.
- a predetermination of the burning time of the delay element is easy to implement between 1 and 13 s.
- the burn time is primarily a function of the length of the delay block and thus predeterminable in a simple manner. This results in high reproducibility, ensuring the safety of the pyrotechnic Elements is guaranteed.
- a cheering set of a composition has proven particularly useful made of 99% black powder and 1% binder.
- the burning time of the delay set can also vary can be used in a very wide range Proportion of black powder as well as silicon or of ferric oxide, the latter two Components act as slag formers.
- a delay set without black powder according to claim 2 Manganese dioxide-zirconium as fuel; have these substances has also proven itself in the delay element according to the invention.
- the transfer rate is expediently energetically adjusted the delay rate. Therefore it is preferred to use a Delay block supplemented with a transfer block.
- the energy required to form a flame beam in the Transfer rate is increased by the addition of zirconium Black powder - as its reducing agent - achieved.
- composition of the used according to claims 3 and 5 Black powder has proven to be particularly advantageous.
- the pressing process is preferably carried out at a pressure of approximately 31 kN / cm 2 .
- the entire delay element is denoted by 1 in FIG. 1. It consists of an elongated, cylindrical sleeve 2 which is filled at one end with the firing kit 3, at the other end with the transfer rate 5.
- the delay rate 4 fills the average volume of the sleeve 2.
- toothed transition 34 of the firing set 3 to the delay set 4 and the transition 45 from the delay set 4 to Transfer rate 5 can be seen.
- a front thread 6 is used for the releasable coupling a fog sentence 7; in a back thread become notorious known detonators (electric or with detonators) coupled.
- a delay element 1 for example with an inner diameter of 3.5 mm takes place directly in it Sleeve 2.
- 50 mg of the lighting set 3 dosed into the sleeve.
- a small subset of the delay rate 4. This can be between 20 and 50 mg vary. Both sets are pressed, which is a typical Teeth 34 caused at the interface of the two sets.
- This step is made according to the total amount to be dosed Delay set 4 repeated several times until the predetermined amount, or the desired length of the Delay rate 4 is reached.
- 30 to 100 mg of the transmission set 5 dosed into the sleeve and then pressed. This in turn creates a toothed transition 45 between the delay and transmission rate 4 or 5.
- Brass sleeves with an inner diameter of 3.5 mm have proven particularly useful.
- the length of the sleeves varies from 15 to 30 mm depending on the desired delay time or the number of sets to be pressed.
- Planned stamps as well as stamps with a corrugated pattern are used as press stamps.
- the pressing is preferably carried out at a pressure of 31 kN / cm 2 ; the holding time of each press stage is 4 to 6 s.
- a column height which is in each case 70 to 80% of the Inner diameter is.
- Binder14 Cellulose derivatives and polymers such as polyvinyl pyrrolidone (PVP) were also used and tested. However, it is evident that different binders, different firing times of the retardation set. For a composition of the retardation rate of 43% black powder, 46% Si and 11% Fe 2 O 3 , a burning time of 3.1 s was achieved with 0.5% binder14; with 6% binder14 a burn time of 4.1 s; with 1% PVP 3.0 s and with 1% collodion E21 a time of 2.4 s.
- PVP polyvinyl pyrrolidone
- the zirconium used was of commercial quality FA Powder, from DEGUSSA AG; also the iron dioxide and silicon were in commercial grit.
- Fig. 2 the burn time t in seconds as a function of the length l in mm is shown graphically for a sleeve 2 with a bore of 3.5 mm diameter.
- This series of experiments relates to a constant deceleration rate of the composition flour powder 43%, Fe 2 O 3 11%, Si 45% and binder Binder14 1%.
- the quantities and compositions of the firing set and the transmission set were also kept constant and the measured delay elements were produced under the same pressures.
- the measured burning times have a linear dependency on the length of the column of the delay set, as the regression line shows; the extrapolated areas of the straight line are drawn.
- the linear relationship enables particularly simple predetermination the burning time of the subject of the invention; she can be extrapolated in the dash-dotted area.
- the subject of the invention is excellently suitable for lighting of smoke projectors of the type according to EP -B1- 0 322 951 and EP -B1- 0 362 523 and others in particular on battle tanks installed fog-throwing systems.
- the low environmental impact of the delay element is particularly favorable, so that it also lends itself to practice ammunition.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Spark Plugs (AREA)
- Press Drives And Press Lines (AREA)
- Materials For Medical Uses (AREA)
Description
- Fig. 1
- einen Längsschnitt durch ein vereinfacht dargestelltes Verzögerungselement mit seinen verzahnten Sätzen
- Fig. 2
- die Brennzeit in Abhängigkeit der Säulenlänge für ein bestimmtes Verzögerungselement
Claims (7)
- Pyrotechnisches Verzögerungselement bestehend aus wenigstens einem Anfeuerungsatz, einem Übertragungssatz und einem brennzeitbestimmenden Verzögerungssatz, welche Sätze miteinander verzahnt und verdichtet in einer metallischen Hülse angeordnet sind, dadurch gekennzeichnet, dass der Verzögerungssatz (4) aus 30-70% Schwarzpulver, 0-60% Silicium, 0-50% Eisen-III-oxid und 0,5-6% Bindemittel besteht, wobei die Brennzeit des Elements (1) durch die Wahl der Länge des gepressten Verzögerungssatzes (4) vorbestimmt ist.
- Pyrotechnisches Verzögerungselement bestehend aus wenigstens einem Anfeuerungsatz, einem Übertragungssatz und einem brennzeitbestimmenden Verzögerungssatz, weiche Sätze miteinander verzahnt und verdichtet in einer metallischen Hülse angeordnet sind, dadurch gekennzeichnet, dass der Verzögerungssatz (4) aus 18-30% Zirkonium, 5-80% Mangandioxid, 0-40% Silicium, 0-50% Eisen-III-oxid und 0,5-6% Bindemittel besteht, wobei die Brennzeit des Elements (1) durch die Wahl der Länge des gepressten Verzögerungssatzes (4) vorbestimmt ist.
- Verzögerungselement nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Übertragungssatz (5) aus 57-94% Schwarzpulver, 5-40% Zirkonium und 1-3% Bindemittel besteht, wobei das Schwarzpulver ein Gemisch aus 77,5% Kaliumnitrat, 13,5% Kohle und 9% Schwefel ist und eine Korngrösse kleiner als 250 µm aufweist.
- Verzögerungselement nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Übertragungssatz (5) aus 20-60% Zirkonium, 40-60% Mangandioxid, 0-15% Silicium, 0-20% Magnesium und 1-3% Bindemittel besteht.
- Verzögerungselement nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Anfeuerungssatz (3) aus 97-99,5% Schwarzpulver und 3-0,5% Bindemittel besteht, wobei das Schwarzpulver ein Gemisch aus 77,5% Kaliumnitrat, 13,5% Kohle und 9% Schwefel ist und eine Korngrösse kleiner als 250 µm aufweist.
- Verfahren zur Herstellung eines pyrotechnischen Verzögerungselements bestehend aus wenigstens einem Anfeuerungsatz, einem Übertragungssatz und einem brennzeitbestimmenden Verzögerungssatz, welche Sätze miteinander verzahnt und verdichtet in einer metallischen Hülse angeordnet sind, nach Anspruch 1 oder 2 oder wenigstens einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass im einem ersten Verfahrensschritt der Anfeuerungssatz in die Hülse eingefüllt wird, dass in einem zweiten Schritt eine Teilportion des Verzögerungssatzes eingefüllt wird, dass in einem dritten Schritt die beiden Schichten mit einem Pressstempel gepresst werden, dass in einem vierten Schritt jeweils weitere Teilportionen des Verzögerungssatzes in die Hülse eingefüllt werden, wobei jede Teilportion vor dem Einfüllen der nächsten Teilportion mit dem Pressstempel gepresst wird, dass in einem fünften Verfahrensschritt die letzte Teilportion des Verzögerungssatzes mit dem nachfolgend eingefüllten Übertragungssatz gepresst wird, wobei das Pressen der Sätze in der Hülse mit einem Druck von mindestens 25 kN/cm2, während 4 bis 6 s erfolgt und dass der Pressstempel ein Planstempel oder ein Stempel mit Riffelmuster ist.
- Verwendung eines Verzögerungselements nach einem der vorangehenden Ansprüche zur Einleitung eines Zündvorganges mit vorbestimmter Verzögerungszeit in einem Nebelwurfkörper.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59608681T DE59608681D1 (de) | 1996-12-13 | 1996-12-13 | Pyrotechnisches Verzögerungselement, Verfahren zu seiner Herstellung sowie dessen Verwendung |
AT96203536T ATE212610T1 (de) | 1996-12-13 | 1996-12-13 | Pyrotechnisches verzögerungselement, verfahren zu seiner herstellung sowie dessen verwendung |
ES96203536T ES2170199T3 (es) | 1996-12-13 | 1996-12-13 | Retardo pirotecnico, procedimiento para su fabricacion asi como su uso. |
EP96203536A EP0847972B1 (de) | 1996-12-13 | 1996-12-13 | Pyrotechnisches Verzögerungselement, Verfahren zu seiner Herstellung sowie dessen Verwendung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96203536A EP0847972B1 (de) | 1996-12-13 | 1996-12-13 | Pyrotechnisches Verzögerungselement, Verfahren zu seiner Herstellung sowie dessen Verwendung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0847972A1 EP0847972A1 (de) | 1998-06-17 |
EP0847972B1 true EP0847972B1 (de) | 2002-01-30 |
Family
ID=8224698
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96203536A Expired - Lifetime EP0847972B1 (de) | 1996-12-13 | 1996-12-13 | Pyrotechnisches Verzögerungselement, Verfahren zu seiner Herstellung sowie dessen Verwendung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0847972B1 (de) |
AT (1) | ATE212610T1 (de) |
DE (1) | DE59608681D1 (de) |
ES (1) | ES2170199T3 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10119769C1 (de) | 2001-04-23 | 2002-10-17 | Trw Airbag Sys Gmbh & Co Kg | Verfahren zur Herstellung eines Anzünders |
WO2016075091A1 (de) * | 2014-11-10 | 2016-05-19 | Dynitec Gmbh | Pyrotechnisches verzögerungselement |
DE102015014821A1 (de) | 2015-11-18 | 2017-05-18 | Rheinmetall Waffe Munition Gmbh | REACh konformer pyrotechnischer Verzögerungs- und Anzündsatz mit variabel einstellbaren Leistungsparametern |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2373799A (en) * | 1942-11-04 | 1945-04-17 | Frank C Wilson | Bomb loading press |
FR931695A (fr) * | 1945-08-01 | 1948-03-01 | Ici Ltd | Compositions d'amorce à retardement |
FR1128524A (fr) * | 1954-04-23 | 1957-01-07 | Ici Ltd | Compositions fusantes à retard et objets en comportant |
US3110638A (en) * | 1958-07-09 | 1963-11-12 | Maurice F Murphy | Controlled sensitivity igniter composition and method of producing same |
FR1400588A (fr) * | 1964-04-14 | 1965-05-28 | Elément de retard pour détonateurs électriques | |
DE1771943C2 (de) * | 1968-08-05 | 1975-03-27 | Dynamit Nobel Ag, 5210 Troisdorf | Anfeuerungssatz für Treibladungen und Raketentreibsätze |
FR2478808B1 (fr) * | 1980-03-21 | 1985-12-13 | France Etat | Module a retard pyrotechnique et son procede de chargement |
CH676389A5 (de) | 1987-07-29 | 1991-01-15 | Eidgenoess Munitionsfab Thun | |
CH674742A5 (de) | 1987-12-24 | 1990-07-13 | Eidgenoess Munitionsfab Thun | |
US4858529A (en) * | 1988-07-01 | 1989-08-22 | The United States Of America As Represented By The Department Of Energy | Spark-safe low-voltage detonator |
DE3828234C2 (de) | 1988-08-19 | 1997-05-22 | Nico Pyrotechnik | Munition aus einem Wurfbecher und einem Wirkkörper |
IL96684A0 (de) * | 1990-12-16 | 1991-09-16 | ||
GB2253207A (en) * | 1991-02-20 | 1992-09-02 | Ici Plc | Pyrotechnic delay composition |
-
1996
- 1996-12-13 ES ES96203536T patent/ES2170199T3/es not_active Expired - Lifetime
- 1996-12-13 AT AT96203536T patent/ATE212610T1/de active
- 1996-12-13 EP EP96203536A patent/EP0847972B1/de not_active Expired - Lifetime
- 1996-12-13 DE DE59608681T patent/DE59608681D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE212610T1 (de) | 2002-02-15 |
DE59608681D1 (de) | 2002-03-14 |
ES2170199T3 (es) | 2002-08-01 |
EP0847972A1 (de) | 1998-06-17 |
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