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EP0288505B1 - Procede pour fabriquer de la poudre de charge propulsive - Google Patents

Procede pour fabriquer de la poudre de charge propulsive Download PDF

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Publication number
EP0288505B1
EP0288505B1 EP87906819A EP87906819A EP0288505B1 EP 0288505 B1 EP0288505 B1 EP 0288505B1 EP 87906819 A EP87906819 A EP 87906819A EP 87906819 A EP87906819 A EP 87906819A EP 0288505 B1 EP0288505 B1 EP 0288505B1
Authority
EP
European Patent Office
Prior art keywords
powder
extruder
process according
mass
gelatinised
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
EP87906819A
Other languages
German (de)
English (en)
Other versions
EP0288505A1 (fr
EP0288505B2 (fr
Inventor
Günther NIEDERMEIER
Helmut Pausch
Wolfgang Miehling
Jürgen KNOBLOCH
Wolfgang Helmich
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.)
WNC Nitrochemie GmbH
Original Assignee
WNC Nitrochemie GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6311878&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0288505(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by WNC Nitrochemie GmbH filed Critical WNC Nitrochemie GmbH
Priority to AT87906819T priority Critical patent/ATE73436T1/de
Publication of EP0288505A1 publication Critical patent/EP0288505A1/fr
Publication of EP0288505B1 publication Critical patent/EP0288505B1/fr
Application granted granted Critical
Publication of EP0288505B2 publication Critical patent/EP0288505B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • C06B21/0075—Shaping the mixture by extrusion
    • 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

Definitions

  • the invention relates to a method for producing propellant charge powder, in particular dibasic POL powder, in which moist, in particular water-moist powder raw material is homogenized and gelatinized by kneading at elevated temperature, then the gelatinized mass is granulated and then the granules are pressed into powder strands, which are processed into the finished powder by cutting and, if necessary, a final treatment.
  • the invention has for its object to provide a method of the type mentioned, which can be carried out continuously on the one hand, but on the other hand in a very reliable manner.
  • this object is achieved according to the invention in that an open, friction-operated shear roller is used for kneading, the raw powder mass being added continuously in the region of one end of the shear roller and at the other end by one of the two rollers of the shear roller a fur of the gelatinized mass is continuously removed; advantageous embodiments of this method emerge from the subclaims.
  • an open shear roller known per se is used for kneading.
  • the kneading process runs continuously on this.
  • the raw powder mass is continuously added in the area of one end of the shear roller and then gradually transported to the other end of the shear roller in the course of kneading.
  • the granulation process is directly connected to the kneading process. This can e.g. happen in such a way that by means of a pelletizing head at the removal end of the shear roller, granulate is punched directly out of the fur arriving there and transported away.
  • An extruder is preferably used to press the granules in connection with the process according to the invention.
  • the resulting granulate can be entered continuously in this. Then you have a production process that is completely continuous from the addition of the raw powder mass to the formation of the powder strands. Since no kneading with its high thermal and mechanical stress on the powder mass needs to take place or should not take place in the extruder used for the pressing, there are no unusual safety problems here either. It is particularly favorable here that the resulting granulate can be fed to the extruder directly from the shear roller while it is still warm. Since no long warm-up zones are then necessary in the extruder, this can be very short.
  • the amount of propellant powder contained in the extruder is correspondingly small, which is favorable for safety.
  • the energy costs required to heat the extruder are reduced. After all, warm powder is more plastic and deforms more easily under mechanical stress. The warm powder therefore reduces the risk of deflagration when the extruder is subjected to mechanical loads.
  • the powder is produced in the so-called semi-solvent process, solvent is metered into the warm granulate from the shear roller in the extruder when the invention is used.
  • the nitroguanidine will also be added at this point. The granulate is pasted by the solvent and nitroguanidine is incorporated into this dough.
  • the lowering of the temperature reduces the adhesion of the fur to the roller and thus increases the transport speed.
  • the temperature gradient can be up to 40 ° C.
  • propellant powder can be produced in a practically ideal manner.
  • the process can run completely continuously, can be remotely controlled and monitored, is far above average, also because there is always only a relatively small amount of product on the shear roller, and finally leads to a particularly high powder quality, especially with regard to stability.
  • the method according to the invention is explained in more detail below with further advantageous details using a drawing.
  • the only figure of the drawing shows schematically a shear roller or a shear roller plant and a downstream extruder for producing dibasic POL powder, i.e. Powder made in a solvent-free process.
  • the known shear roller or shear roller assembly 1 comprises two rollers 2 and 3 arranged horizontally next to one another, which are driven in opposite directions in the direction of arrows 4.
  • Each roller 2 and 3 has its own drive, which allows a stepless speed control, so that working with friction is possible over the entire speed range.
  • Hydrostatic drives are used for the hazardous area.
  • the rear roller 2 in the figure is set hydraulically against the front roller 3.
  • the nip can be adjusted to a width between 0.5 and 5 mm via the front roller 3.
  • Both rollers 2 and 3 can be heated from the inside to a temperature between 20 and 120 ° C by means of a heat transfer medium.
  • the rollers 2 and 3 are each provided with spiral shear grooves 5, which have a product-specific geometry that is expressed in the groove width, groove depth, pitch angle and number of shear grooves.
  • the scissor grooves 5 are designed so that the processed product is continuously transported from the front end in the figure, the feed end 6, to the rear discharge end 7.
  • a metering unit 9 is arranged, from which water-moist powder raw material for the production of dibasic POL powder, which has a moisture content of approx. 30%, is placed on the shear roller. There, the raw powder mass is kneaded in the nip. A coat of raw powder material is formed on the front roller 3 over the entire length of the roller. The two rollers are kept at an elevated temperature by means of the heat transfer medium. A kneaded product pool collects above the nip from which the water is pressed out.
  • the start of gelatinization with a gray-white coloration of the powder mass is evident.
  • the ground skin has already changed to a dark shade of gray.
  • the mass skin is gelatinized and appears transparent black.
  • the temperature, the nip width of the nip and thus also the nip pressure and the speeds of the two rollers 2 and 3 are selected so that the gelatinized powder skin still has a residual moisture content of approx. 1% at the end of the delivery.
  • the temperature of the two rollers is typically between 70 and 110 ° C.
  • the temperature of the rear roller is kept a few degrees lower than that of the front roller.
  • the fur sticks to the front their roller.
  • the temperature difference between feed end 6 and discharge end 7 is chosen so that the fur is transported everywhere at approximately the same speed.
  • a typical value for the temperature difference is 30 ° C.
  • the speed of the rollers should be between 30 and 70 rpm, the front roller on which the skin is located has the higher speed.
  • a suitable gradient of the shearing grooves 5 is between 30 to 60 0 to the roll axis.
  • the shear grooves have the same slope over the entire length of the shear roller. So it can be advantageous to make the slope of the scissor grooves near the feed end 6 smaller than near the discharge end 7 in order to initially achieve a relatively longer dwell time of the fur behind the feed end, which enables a good squeezing of the water.
  • the depth of the shear grooves is advantageously between 0.4 and 2.5 mm.
  • the total residence time of the raw powder mass on the shear roller should be between 3 and 8 minutes.
  • the still warm granules 8 fall into the receiving funnel 11 of an extruder 10, in which the granules are pressed into powder strands by a die 12.
  • the extruder 10 has only one screw conveyor 13 inside and no kneading elements.
  • the extruder is only shown schematically; in practice it can be a twin-screw extruder.
  • the powder strands which emerge continuously from the die or shaping nozzle 12 are transported in a manner not shown by means of a treadmill into a cutting space and are continuously cut there to form the actual powder, which is then optionally subjected to an aftertreatment.
  • the extruder should have a length of at least 20 cm and be heatable and coolable.
  • the shear roller 1 There are only 2-3 kg of powder on the shear roller 1. This is very convenient for security.
  • the two rollers 2 and 3 are self-cleaning, so that a quick product change is possible.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Glanulating (AREA)
  • Medicinal Preparation (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Detergent Compositions (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Fodder In General (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

Pour fabriquer de la poudre de charge propulsive bivalente par le procédé sans solvant, le mélange brut de poudre humide est malaxé à haute température dans un cylindre de cisaillement auquel le mélange est amené en continu et sur une extrémité frontale duquel le mélange gélifié est prélevé en continu et granulé immédiatement en continu. Le granulat obtenu est acheminé en continu à une extrudeuse au moyen de laquelle il est boudiné sous forme de cordons de poudre qui sont transformés, par coupe et traitement de finition, en produit pulvérulent fini. Ce procédé présente le double avantage de pouvoir être exécuté entièrement en continu et d'être très fiable.

Claims (7)

1. Procédé pour fabriquer de la poudre de charge propulsive, en particulier de la poudre POL bibasique, dans lequel une masse brute de poudre, humide et en particulier imprégnée d'eau, est homogénéisée et gélatinifiée par pétrissage à une température plus élevée, puis la masse gélatinifiée est granulée et le granulé est réduit par compression en cordons de poudre qui sont transformée en poudre finie par découpage et, le cas échéant, par un traitement final, caractérisé en ce qu'un cylindre de cisaillement ouvert et actionnable avec friction est utilisé pour le pétrissage, la masse brute de poudre étant ajoutée de façon continue dans la zone de l'une des extrémités frontales du cylindre de cisaillement et une peau de la masse gélatinifiée étant enlevée de façon continue, à l'autre extrémité frontale de l'un des deux cylindres du cylindre de cisaillement.
2. Procédé selon la revendication 1, caractérisé en ce que l'on granule la masse gélatinifiée de façon continue lors de son enlèvement.
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'on utilise une extrudeuse fonctionnant sans action de pétrissage, pour la compression du granulat.
4. Procédé selon la revendication 3, caractérisé en ce que l'on amène directement à l'extrudeuse le granulat produit, encore à l'état chaud.
5. Procédé selon la revendication 3 ou 4 pour la fabrication d'une poudre de charge propulsive tribasique, caractérisé en ce que l'on amène le troisième porteur d'energie, la nitroguanidine, plus un solvant, à l'extrudeuse, et en ce que l'on incorpore la nitroguanidine dans l'extrudeuse dans le granulat préparé à l'aide du solvant.
6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que l'on règle la température, la largeur d'écartement et/ou le nombre de tours du cylindre de cisaillement de telle sorte que la masse gélatinifiée possède, lors de son enlèvement, une teneur en eau résiduelle de moins de 3 %, de préférence d'environ 1 %.
7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que l'on chauffe le cylindre de cisaillement de telle sorte qu'il en résulte une chute de la température dans le sens axial, celle-ci baissant en direction de l'extrémité frontale d'évacuation du cylindre de cisaillement.
EP87906819A 1986-10-16 1987-10-08 Procede pour fabriquer de la poudre de charge propulsive Expired - Lifetime EP0288505B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87906819T ATE73436T1 (de) 1986-10-16 1987-10-08 Verfahren zum herstellen von treibladungspulver.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3635296 1986-10-16
DE3635296A DE3635296C2 (de) 1986-10-16 1986-10-16 Verfahren zum Herstellen von Treibladungspulver
PCT/EP1987/000585 WO1988002743A1 (fr) 1986-10-16 1987-10-08 Procede pour fabriquer de la poudre de charge propulsive

Publications (3)

Publication Number Publication Date
EP0288505A1 EP0288505A1 (fr) 1988-11-02
EP0288505B1 true EP0288505B1 (fr) 1992-03-11
EP0288505B2 EP0288505B2 (fr) 1998-06-17

Family

ID=6311878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87906819A Expired - Lifetime EP0288505B2 (fr) 1986-10-16 1987-10-08 Procede pour fabriquer de la poudre de charge propulsive

Country Status (19)

Country Link
US (1) US4963296A (fr)
EP (1) EP0288505B2 (fr)
JP (1) JP2681183B2 (fr)
KR (1) KR960000756B1 (fr)
CN (1) CN1015170B (fr)
AR (1) AR246729A1 (fr)
AU (2) AU8107187A (fr)
BR (1) BR8707506A (fr)
CA (1) CA1304942C (fr)
DE (2) DE3635296C2 (fr)
EG (1) EG20112A (fr)
ES (1) ES2007423A6 (fr)
FI (1) FI92581C (fr)
GR (1) GR871431B (fr)
IL (1) IL83998A (fr)
IN (1) IN169922B (fr)
PT (1) PT85927B (fr)
WO (1) WO1988002743A1 (fr)
ZA (1) ZA877700B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003035580A2 (fr) 2001-10-24 2003-05-01 BOWAS AG für Industrievertrieb Fabrication d'une charge propulsive sous forme pulverulente et exempte de solvants

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DE3838646A1 (de) * 1988-11-15 1990-05-17 Wolff Walsrode Ag Phlegmatisierte nitrocellulosegemische
DE3838645A1 (de) * 1988-11-15 1990-05-17 Wolff Walsrode Ag Verfahren zur herstellung phlegmatisierter nitrocellulosegemische
JPH0777992B2 (ja) * 1989-05-11 1995-08-23 ヴェー エヌ ツェー ニトロヘミー ゲゼルシャフト ミト ベシュレンクテル ハフツング トリベース推進装薬粉末を製造する方法及びその装置
DE4012294C1 (fr) * 1989-05-11 1991-02-14 Wnc-Nitrochemie Gmbh, 8261 Aschau, De
SE465572B (sv) * 1989-06-21 1991-09-30 Nobel Kemi Ab Saett och anordning foer framstaellning av explosiva substanser
US5084218A (en) * 1990-05-24 1992-01-28 Trw Vehicle Safety Systems Inc. Spheronizing process
US5349892A (en) * 1991-11-06 1994-09-27 Alliant Techsystems Inc. Propellant stick kerfing apparatus and method
WO1994017111A1 (fr) * 1993-01-29 1994-08-04 The Valspar Corporation Composition de revetement a base de polyester de copolymere en bloc a fonctionnalite hydroxyle
DE4402047C2 (de) * 1994-01-25 1995-12-07 Bayern Chemie Gmbh Flugchemie Verfahren zur Herstellung einer gaserzeugenden Masse
FR2723086B1 (fr) * 1994-07-29 1996-09-13 Poudres & Explosifs Ste Nale Procede continu de fabrication sans solvant de produits pyrotechniques composites
HU219501B (hu) * 1994-09-16 2001-04-28 Hagedorn Ag. Eljárás és berendezés képlékenyített cellulóz-nitrát előállítására
FR2749008B1 (fr) * 1996-05-23 1998-06-26 Poudres & Explosifs Ste Nale Procede continu de fabrication sans solvant de produits pyrotechniques composites thermodurcissables
EP1164116B1 (fr) * 2000-06-15 2005-01-26 Nitrochemie Wimmis AG Procédé de production de matière à haute énergie fonctionelle
US20090208647A1 (en) * 2000-06-15 2009-08-20 Nitrochemie Wimmis Ag Method for producing a funtional, high-energy material
DE102008059740B3 (de) * 2008-12-01 2010-04-29 Bowas AG für Industrieplanung Verfahren zur Herstellung von Explosivstoffen
US8062563B2 (en) * 2009-12-14 2011-11-22 Bowas AG für Industrieplanung Method of manufacturing explosives
EP2332894A1 (fr) * 2009-12-14 2011-06-15 Bowas AG für Industrieplanung Procédé et fabrication de matières explosives
CN102276370B (zh) * 2010-06-13 2012-11-28 无锡锡东能源科技有限公司 火药螺杆连续成型机
KR101301502B1 (ko) * 2011-03-16 2013-08-29 주식회사 유림기계 톱밥 제조기의 목재 인입장치
CN103483113B (zh) * 2013-08-28 2016-06-22 辽宁天亿机械有限公司 双出料压片机火药专用强迫加料机构
CN103524276B (zh) * 2013-09-26 2016-01-20 中煤科工集团淮北爆破技术研究院有限公司 用于乳化炸药基质的敞开式冷却装置
CN103980071A (zh) * 2014-05-06 2014-08-13 西安近代化学研究所 一种用于炸药捏合碾片的滚筒装置
CN104016818B (zh) * 2014-05-29 2017-04-05 山东大学 一种多功能乳化炸药切割装置及其方法
CN104950056B (zh) * 2015-07-14 2017-03-01 西安近代化学研究所 一种叠氮硝胺吸收药样品制备方法
RU2606418C1 (ru) * 2015-07-30 2017-01-10 Валерий Гургенович Джангирян Способ получения тонкосводного пороха для патронов стрелкового оружия и специального назначения

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003035580A2 (fr) 2001-10-24 2003-05-01 BOWAS AG für Industrievertrieb Fabrication d'une charge propulsive sous forme pulverulente et exempte de solvants

Also Published As

Publication number Publication date
ZA877700B (en) 1988-04-19
GR871431B (en) 1987-12-14
IL83998A (en) 1991-12-15
DE3777399D1 (de) 1992-04-16
CN1015170B (zh) 1991-12-25
KR880701695A (ko) 1988-11-04
JP2681183B2 (ja) 1997-11-26
CA1304942C (fr) 1992-07-14
IL83998A0 (en) 1988-02-29
CN87106808A (zh) 1988-04-27
PT85927A (pt) 1988-11-30
FI882858A (fi) 1988-06-15
IN169922B (fr) 1992-01-11
EP0288505A1 (fr) 1988-11-02
DE3635296A1 (de) 1988-04-28
EG20112A (en) 1997-07-31
ES2007423A6 (es) 1989-06-16
FI882858A0 (fi) 1988-06-15
AU7275391A (en) 1991-07-11
AU8107187A (en) 1988-05-06
FI92581B (fi) 1994-08-31
AU651087B2 (en) 1994-07-14
PT85927B (pt) 1993-07-30
EP0288505B2 (fr) 1998-06-17
US4963296A (en) 1990-10-16
FI92581C (fi) 1994-12-12
BR8707506A (pt) 1989-02-21
KR960000756B1 (ko) 1996-01-12
WO1988002743A1 (fr) 1988-04-21
JPH01501140A (ja) 1989-04-20
AR246729A1 (es) 1994-09-30
DE3635296C2 (de) 1995-12-21

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