EP0288505A1 - Procede pour fabriquer de la poudre de charge propulsive. - Google Patents

Procede pour fabriquer de la poudre de charge propulsive.

Info

Publication number
EP0288505A1
EP0288505A1 EP87906819A EP87906819A EP0288505A1 EP 0288505 A1 EP0288505 A1 EP 0288505A1 EP 87906819 A EP87906819 A EP 87906819A EP 87906819 A EP87906819 A EP 87906819A EP 0288505 A1 EP0288505 A1 EP 0288505A1
Authority
EP
European Patent Office
Prior art keywords
powder
continuously
roller
extruder
shear roller
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.)
Granted
Application number
EP87906819A
Other languages
German (de)
English (en)
Other versions
EP0288505B1 (fr
EP0288505B2 (fr
Inventor
Gunther Niedermeier
Helmut Pausch
Wolfgang Miehling
Jurgen 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
Nitrochemie Aschau GmbH
Original Assignee
WNC Nitrochemie GmbH
Nitrochemie Aschau 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(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by WNC Nitrochemie GmbH, Nitrochemie Aschau 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

Links

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 two-base POL powder from water-moist powder raw material, according to the preamble of claim 1.
  • the invention is based on the object of specifying a method of the type mentioned at the outset which, on the one hand, can be carried out continuously but on the other hand in a very reliable manner.
  • 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 granulating 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 out directly from 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 load on the powder mass needs to take place or should not take place in the extruder used for the pressing, there are also no unusual safety problems here. 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 enclosed 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.
  • 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 safe, 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 in terms of stability.
  • the method according to the invention is explained in more detail below with further advantageous details using a drawing.
  • the only figure in the drawing shows schematically a shear roller or a shear roller plant and a downstream extruder for producing two-base POL powder, ie powder which is produced in a single process.
  • the known shear roller or the shear roller mechanism 1 comprises two rollers 2 and 3 arranged horizontally next to one another, which are driven in opposite directions in the direction of the 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 roller gap can be adjusted to a width between 0.5 and 5 mm via the front roller 3.
  • Both rollers 2 and 3 can be tempered 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 which is expressed in the groove width, groove depth, pitch angle and number of shear grooves.
  • the scissor grooves 5 are designed in such a way 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 above the feed end 6, From which water-moist pulp raw material for the production of dibasic POL powder, which has a moisture content of approx. 30%, is added to the shear roller. There, the raw powder mass is kneaded in the nip. A fur of raw material forms over the entire length of the roller on the front roller 3. The two rollers are kept at an elevated temperature by means of the heat transfer medium. A kneaded product stock gathers above the roller gap, from which the water is pressed out. Due to the intensive kneading and transporting effect of the shear roller 2, 3, the beginning of the gelatinization with a gray-white coloration of the powder mass is already visible after walking through about a third of the roller length.
  • the mass skin After two thirds of the length of the roller, the mass skin has already changed to a dark shade of gray. At the end of delivery 7, the mass skin is finally gelatinized and appears transparent black.
  • the temperature, the nip width of the nip and thus also the nip pressure and the rotational 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 rolls is between 70 and 110 ° C.
  • the temperature of the rear roller is kept a few degrees lower than that of the front roller. This causes the fur to adhere to the front roller.
  • the heating of the two rollers is advantageous in such a way that there is a temperature gradient in the axial direction with a drop in temperature towards the discharge end 7.
  • 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 fur is located being the higher . Has speed.
  • a suitable steepness of the shear grooves 5 is between 30 to 60 ° relative to the roller 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 ensures a good squeezing of the what ⁇ sers enables.
  • the depth of the shear grooves is expediently between 0.4 and 2.5 mm. Overall, the residence time of the raw powder mass on the shear roller should be between 3 and 8 minutes.
  • the sharpening takes place, for example, in such a way that one to three normal hydrochloric acid is applied to the roller surface at 50 to 100 ° C. Here, the roller runs at a slow number of revolutions. When the hydrochloric acid has evaporated, the roller surface is washed off with water. The appropriate surface roughness is achieved with this treatment.
  • 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)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Fodder In General (AREA)
  • Detergent Compositions (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (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.
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 true EP0288505A1 (fr) 1988-11-02
EP0288505B1 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
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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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
WO1990013528A2 (fr) * 1989-05-11 1990-11-15 Wnc-Nitrochemie Gmbh Procede et dispositif pour produire une poudre de charge propulsive tribasique
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
AU691171B2 (en) * 1993-01-29 1998-05-14 Valspar Corporation, The Coating composition of a hydroxyl-functional block copolymer polyester
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
US20090208647A1 (en) * 2000-06-15 2009-08-20 Nitrochemie Wimmis Ag Method for producing a funtional, high-energy material
ES2235813T3 (es) * 2000-06-15 2005-07-16 Nitrochemie Wimmis Ag Procedimiento para la fabricacion de un material funcional altamente energetico.
DE10152397B4 (de) * 2001-10-24 2009-08-06 BOWAS AG für Industrievertrieb Herstellung von lösungsmittelfreiem Treibladungspulver
DE102008059740B3 (de) * 2008-12-01 2010-04-29 Bowas AG für Industrieplanung Verfahren zur Herstellung von Explosivstoffen
EP2332894A1 (fr) * 2009-12-14 2011-06-15 Bowas AG für Industrieplanung Procédé et fabrication de matières explosives
US8062563B2 (en) 2009-12-14 2011-11-22 Bowas AG für Industrieplanung Method of manufacturing 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

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2606418C1 (ru) * 2015-07-30 2017-01-10 Валерий Гургенович Джангирян Способ получения тонкосводного пороха для патронов стрелкового оружия и специального назначения

Also Published As

Publication number Publication date
EG20112A (en) 1997-07-31
CN1015170B (zh) 1991-12-25
JP2681183B2 (ja) 1997-11-26
DE3635296A1 (de) 1988-04-28
US4963296A (en) 1990-10-16
JPH01501140A (ja) 1989-04-20
IN169922B (fr) 1992-01-11
EP0288505B1 (fr) 1992-03-11
CN87106808A (zh) 1988-04-27
KR880701695A (ko) 1988-11-04
FI882858A0 (fi) 1988-06-15
AU8107187A (en) 1988-05-06
AU651087B2 (en) 1994-07-14
AU7275391A (en) 1991-07-11
DE3777399D1 (de) 1992-04-16
CA1304942C (fr) 1992-07-14
IL83998A0 (en) 1988-02-29
AR246729A1 (es) 1994-09-30
PT85927A (pt) 1988-11-30
WO1988002743A1 (fr) 1988-04-21
ZA877700B (en) 1988-04-19
FI882858A (fi) 1988-06-15
ES2007423A6 (es) 1989-06-16
FI92581C (fi) 1994-12-12
DE3635296C2 (de) 1995-12-21
EP0288505B2 (fr) 1998-06-17
KR960000756B1 (ko) 1996-01-12
BR8707506A (pt) 1989-02-21
GR871431B (en) 1987-12-14
IL83998A (en) 1991-12-15
FI92581B (fi) 1994-08-31
PT85927B (pt) 1993-07-30

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