EP0098371A2 - Apparatus for dehydrating and plastifying mixtures of explosives - Google Patents

Apparatus for dehydrating and plastifying mixtures of explosives Download PDF

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Publication number
EP0098371A2
EP0098371A2 EP83104884A EP83104884A EP0098371A2 EP 0098371 A2 EP0098371 A2 EP 0098371A2 EP 83104884 A EP83104884 A EP 83104884A EP 83104884 A EP83104884 A EP 83104884A EP 0098371 A2 EP0098371 A2 EP 0098371A2
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EP
European Patent Office
Prior art keywords
water
screw
screw extruder
housing
conveyor
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Granted
Application number
EP83104884A
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German (de)
French (fr)
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EP0098371A3 (en
EP0098371B1 (en
Inventor
Dietmar Dr. Dipl.- Chem. Müller
Hiltmar Dr. Dr. Rer. Nat. Schubert
Rudolf Kröhnert
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Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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Priority to AT83104884T priority Critical patent/ATE32056T1/en
Publication of EP0098371A2 publication Critical patent/EP0098371A2/en
Publication of EP0098371A3 publication Critical patent/EP0098371A3/en
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing

Definitions

  • the invention relates to a device for dewatering and plasticizing water-moist explosive mixtures, for. B. powder raw materials, by means of a screw extruder with one or more screw shafts with t kneading and conveying elements and an optionally composed of axial sections housing with a filling opening for the water-moist explosive mixture.
  • Explosive mixtures e.g. B. fibrous powder raw materials which consist of nitrocellulose and nitroglycerin, but also peroxide-containing materials are processed for safety reasons in a water-moist state, for. B. plasticized.
  • Dewatering and plasticizing today mostly take place with screw extruders (DE-AS 28 25 567, DE-OS 30 44 577), which not only enable continuous work, but by using defined screw geometries and a defi. ned temperature curve over the length of the screw extruder enable perfect processing. It is known to work with single or multiple extruders.
  • the worm shafts usually have alternating conveying sections and kneading sections in the axial direction, the water being squeezed out of the mass and the solid material being plasticized at the same time. The largest amount of water accumulates in the first sections immediately behind the filling opening of the screw extruder and runs back into the rear area.
  • the water collects in the feed area, where the unprocessed material is metered in.
  • the slurry can run out in the feed area and, due to its nitroglycerin content, can pose a safety risk.
  • the invention has for its object to design a screw extruder of the structure described above so that on the one hand no slurries occur in the feed area, and on the other hand the formulation of the plasticized material is not falsified.
  • This object is achieved in that in the area of the filling opening a discharge channel for the water starting from the interior of the screw extruder and in this a conveyor for removing the solids contained in the pressed water is arranged.
  • the outlet channel is connected to the interior of the extruder via an outlet opening which widens from the interior to the outlet channel. This further reduces the risk of clogging in the area of the drain opening.
  • the solids discharge through the outlet opening can be done by a corresponding screw geometry in the extruder, for. B. keep to a minimum by a concave shell geometry with sealing profile. In practice, a solids content of ⁇ 1% could be found in the drain water.
  • the conveyor is a screw coil, for. B. made of a thick steel wire, thereby avoiding that a noteworthy pressure is exerted on the solid particles located in the drainage channel even if they accumulate in large quantities.
  • the drain channel because of the large free cross-sections of the screw spiral, it is practically impossible for the drain channel to clog.
  • the measures according to the invention can also be supported in that the drainage channel is under negative pressure, which at the same time ensures that the draining mass cannot escape due to any leaks that may be present.
  • a particularly advantageous embodiment of the invention is characterized in that the discharge channel is arranged approximately parallel to the axis of the screw extruder and opens out at the rear end of the housing.
  • This embodiment has the advantage that any heating ducts that are also generally axially parallel are not disturbed in their arrangement by the outlet duct.
  • the drain channel is formed by a tube which is open on the circumferential side to the drain opening and which is inserted into an axially parallel bore in the housing and accommodates the conveyor in its interior.
  • a container for holding the water-solid mixture is expediently connected to the tube outside the housing.
  • the container can optionally also serve to separate the solid particles.
  • the drive of the conveyor is derived from the drive of the worm shafts.
  • the conveyor is, for example, a screw helix
  • a gear member reversing the direction of rotation is arranged between the drive shaft and the worm shafts. So while the screws of the extruder work in one direction, the screw shaft conveys the drainage material in the opposite direction back to the rear end of the housing.
  • the derivation of the drive from the drive of the screw extruder has the advantage that no special explosion protection measures are required for driving the screw helix, but rather these are ensured by the explosion protection of the drive of the screw extruder which is necessary anyway.
  • a screw extruder 1 which can be designed as a single or multi-screw extruder.
  • the screw extruder 1 has a housing 2, which is optionally constructed from a plurality of axial sections, of which the drawing shows the first section 3 in the feed direction in the feed region of the screw extruder.
  • a radially extending filling opening 4 is arranged in this feed region.
  • the drive shaft 6 is led into the interior 7 through the rear end face 5 of the housing. There it has a conveying section in the form of a screw 8, which exerts only a small pressing effect on the metered material.
  • the apex 9 of the screw flight is designed as a sealing profile, while the screw base 10 has a concave shell shape.
  • the worm shaft 6 is driven by an explosion-proof drive 11, not shown in detail. It is preferably a double-shaft extruder, the second shaft being located in front of or behind the screw shaft 6. This can be the same or the opposite.
  • the housing 2 In its rear section 3, the housing 2 is provided with a drain opening 12 which is approximately opposite the filling opening 4 in its front area.
  • the drain opening 12 has an outwardly conically widening wall 13 and opens into a cylindrical drain channel 14 which runs axially parallel to the screw shafts 6 and extends from the rear end face 5 of the housing section 3.
  • a conveying member 15 is arranged in the form of a helical screw, which is driven at its outer end via a gear member 16 by the drive 11 of the worm shafts in a direction opposite to the direction of rotation of the worm. H. the helical coil 15 does not convey the water with the solid particles through the drain opening 12 into the drain channel 14 to the rear.
  • the drain channel 14 is formed by a tube 17 which is inserted into an axially parallel bore 18 in the housing section 3.
  • the conveyor 15 is in turn arranged in the form of a spiral coil inside the tube.
  • the pipe 17 has at its end in the housing a peripheral opening 19 which, when inserted, lies approximately below the drain opening 12.
  • the tube 17 is tightly connected outside the housing 2 of the screw extruder 1 to a collecting container 19 ', through which the drive shaft 20 of the screw coil is passed.
  • the collecting container 19 ' can optionally be under negative pressure, which is generated, for example, by an oil or water jet pump.
  • the device according to the invention can work with an appropriate length and corresponding structure of the individual sections of the screws as an extruder, that is to say for the immediate production of one or more extruded profiles from the water-moist mass, or can only work as a screw press with a short process length, the dewatered and plasticized product is further processed in subsequent process stages.

Abstract

In the case of an apparatus for dewatering and plastifying water-wet mixtures of materials for manufacturing explosives, as for example mixtures for producing propellent charges, using a screw extruder with one or more screws having kneading and conveying elements and a housing, possibly made up of axial sections, with a filling port for the said mixture as wetted with water, certain steps are taken for stopping the formation of slurries at the back end or part of the screw extruder, that is to say at the filling port there is an outwardly widening drain port with a drain duct joined thereto in which there is a conveyor for clearing the expressed water and the solids therein and moving them to the back end of the screw extruder.

Description

Die Erfindung betrifft eine Vorrichtung zum Entwässern und Plastifizieren von wasserfeuchten Explosivstoffgemischen, z. B. Pulverrohmassen, mittels eines Schneckenextruders mit ein oder mehr Schneckenwellen mit t Knet- und Förderelementen und einem gegebenenfalls aus axialen Abschnitten zusammengesetzten Gehäuse mit einer Füllöffnung für das wasserfeuchte Explosivstoffgemisch.The invention relates to a device for dewatering and plasticizing water-moist explosive mixtures, for. B. powder raw materials, by means of a screw extruder with one or more screw shafts with t kneading and conveying elements and an optionally composed of axial sections housing with a filling opening for the water-moist explosive mixture.

Explosivstoffgemische, z. B. faserige Pulverrohmassen, die aus Nitrozellulose und Nitroglyzerin bestehen, aber auch peroxid-haltige Massen werden aus sicherheitstechnischen Gründen in wasserfeuchtem Zustand verarbeitet, z. B. plastifiziert. Das Entwässern und Plastifizieren erfolgt heute zumeist mit Schneckenextrudern (DE-AS 28 25 567, DE-OS 30 44 577), die nicht nur ein kontinuierliches Arbeiten ermöglichen, sondern durch Einsatz definierter Schneckengeometrien und eines defi-. nierten Temperaturverlaufs über die Länge des Schneckenextruders eine einwandfreie Verarbeitung ermöglichen. Dabei ist es bekannt, mit Ein-oder Mehrwel/enextrudern zu arbeiten. Die Schneckenwellen besitzen in axialer Richtung meist abwechselnd Förderabschnitte und Knetabschnitte, wobei das Wasser aus der Masse abgepreßt und das Feststoffmaterial zugleich plastifiziert wird. Die größte Menge an Wasser fällt dabei in den ersten Abschnitten unmittelbar hinter der Füllöffnung des Schneckenextruders an und läuft in den rückwärtigen Bereich zurück.Explosive mixtures, e.g. B. fibrous powder raw materials which consist of nitrocellulose and nitroglycerin, but also peroxide-containing materials are processed for safety reasons in a water-moist state, for. B. plasticized. Dewatering and plasticizing today mostly take place with screw extruders (DE-AS 28 25 567, DE-OS 30 44 577), which not only enable continuous work, but by using defined screw geometries and a defi. ned temperature curve over the length of the screw extruder enable perfect processing. It is known to work with single or multiple extruders. The worm shafts usually have alternating conveying sections and kneading sections in the axial direction, the water being squeezed out of the mass and the solid material being plasticized at the same time. The largest amount of water accumulates in the first sections immediately behind the filling opening of the screw extruder and runs back into the rear area.

Bei den bekannten Schneckenextrudem sammelt sich das Wasser im Einzugsbereich, wo das unverarbeitete Material zudosiert wird. Dies führt zu einer unerwünschten Aufschlämmung, in der sich gewisse Bestandteile solcher Explosivstoffgemische, wie beispielsweise Nitroglyzerin oder auch Nitroguanidin lösen, so daß die Rezeptur des plastifizierten Materials verfälscht wird. In ganz ungünstigen Fällen kann die Aufschlämmung im Einzugsbereich auch auslaufen und aufgrund ihres Gehaltes an Nitroglyzerin zu einem sicherheitstechnischen Risiko werden.In the known screw extruders, the water collects in the feed area, where the unprocessed material is metered in. This leads to an undesirable slurry in which certain components of such explosive mixtures, such as nitroglycerin or nitroguanidine, dissolve, so that the formulation of the plasticized material is falsified. In very unfavorable cases, the slurry can run out in the feed area and, due to its nitroglycerin content, can pose a safety risk.

Der Erfindung liegt die Aufgabe zugrunde, einen Schneckenextruder des eingangs geschilderten Aufbaus so auszubilden, daß es einerseits im Einzugsbereich nicht zu Aufschlämmungen kommt, andererseits die Rezeptur des plastifizierten Materials nicht verfälscht wird.The invention has for its object to design a screw extruder of the structure described above so that on the one hand no slurries occur in the feed area, and on the other hand the formulation of the plasticized material is not falsified.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß im Bereich der Füllöffnung ein vom Innenraum des Schneckenextruders ausgehender Ablaufkanal für das Wasser und in diesem ein Förderer zum Abführen der im abgepreßten Wasser enthaltenen Feststoffe angeordnet ist.This object is achieved in that in the area of the filling opening a discharge channel for the water starting from the interior of the screw extruder and in this a conveyor for removing the solids contained in the pressed water is arranged.

Um einen größeren Wasserstau im Einzugsbereich zu vermeiden, liegt es an sich nahe, dort entsprechende Ablauföffnungen vorzusehen. Damit läßt sich jedoch das geschilderte Problem nicht beheben, da sich solche Ablauföffnungen verlegen und nach kurzer Zeit wiederum zu einem Waserstau führen. Mi t der erfindungsgemäßen Ausbildung werden die wenn auch nur in geringen Mengen im Ablaufwasser enthaltenen Feststoffpartikel zusammen mit dem abgepreßten Wasser mittels des Förderers wegtransportiert, so daß sich, wie praktische Versuche gezeigt haben, im Einzugsbereich keine Aufschlämmungen mehr zeigen. Die im Ablauf enthaltenen Feststoffpartikel können selbstverständlich wiederverwendet werden.In order to avoid a larger water build-up in the catchment area, it makes sense to provide appropriate drainage openings there. However, this does not solve the problem described, since such drainage openings are blocked and, after a short time, lead to a backlog of water. With the design according to the invention, the solid particles, even if contained only in small amounts in the discharge water, are transported away together with the squeezed-out water by means of the conveyor, so that, as practical tests have shown, no more slurries show up in the feed area. The solid particles contained in the drain can of course be reused.

Gemäß einer bevorzugten Ausführungsform ist der Ablaufkanal mit dem Innenraum des Extruders über eine Ablauföffnung verbunden, die sich von Innenraum zum Ablaufkanal hin erweitert. Hierdruch wird die Verstopfungsgefahr im Bereich der Ablauföffnung weiter vermindert. Der Feststoff-Austrag über die Ablauföffnung läßt sich durch eine entsprechende Schneckengeometrie im Extruder, z. B. durch eine konkave Schalengeometrie mit Dichtprofil auf einem Minimum halten. In der Praxis konnte ein Feststoffantei l von < 1% im Abl aufwasser festgestell t werden .According to a preferred embodiment, the outlet channel is connected to the interior of the extruder via an outlet opening which widens from the interior to the outlet channel. This further reduces the risk of clogging in the area of the drain opening. The solids discharge through the outlet opening can be done by a corresponding screw geometry in the extruder, for. B. keep to a minimum by a concave shell geometry with sealing profile. In practice, a solids content of <1% could be found in the drain water.

In einer besonders einfachen Ausführung ist der Förderer als Schraubenwendel, z. B. aus einem dicken Stahldraht, ausgebildet, dadurch wird vermieden, daß auf die im Ablaufkanal befindlichen Feststoffpartikel auch dann, wenn sie sich in größeren Mengen ansammeln, ein nennenswerter Druck ausgeübt wird. Zudem ist aufgrund der großen freien Querschnitte der Schraubenwendel ein Verstopen des Ablaufkanals praktisch unmögl ich.In a particularly simple embodiment, the conveyor is a screw coil, for. B. made of a thick steel wire, thereby avoiding that a noteworthy pressure is exerted on the solid particles located in the drainage channel even if they accumulate in large quantities. In addition, because of the large free cross-sections of the screw spiral, it is practically impossible for the drain channel to clog.

Die erfindungsgemäßen Maßnahmen können noch dadurch unterstützt werden, daß der Ablaufkanal unter Unterdruck steht, womit zugleich sichergestellt ist, daß die ablaufende Masse nicht aufgrund eventuell vorhandener Undichtigkeiten austreten kann.The measures according to the invention can also be supported in that the drainage channel is under negative pressure, which at the same time ensures that the draining mass cannot escape due to any leaks that may be present.

Eine besonders zweckmäßige Ausführungsform der Erfindung zeichnet sich dadurch aus, daß der Ablaufkanal etwa parallel zur Achse des Schneckenextruders angeordnet ist und an der rückwärtigen Stirnseite des Gehäuses ausmündet. Diese Ausführungsform hat den Vorteil, daß eventuell vorhandene Heizkanäle, die gleichfalls im allgemeinen achsparallel verlaufen, in ihrer Anordnung durch den Ablaufkanal nicht gestört werden.A particularly advantageous embodiment of the invention is characterized in that the discharge channel is arranged approximately parallel to the axis of the screw extruder and opens out at the rear end of the housing. This embodiment has the advantage that any heating ducts that are also generally axially parallel are not disturbed in their arrangement by the outlet duct.

Bei einem weiteren vorteilhaften Ausführungsbeispiel ist vorgesehen, daß der Ablaufkanal von einem umfangsseitig zur Ablauföffnung offenen Rohr gebildet ist, das in eine achsparallele Bohrung des Gehäuses eingeschoben ist und in seinem Innenraum den Förderer aufnimmt.In a further advantageous exemplary embodiment it is provided that the drain channel is formed by a tube which is open on the circumferential side to the drain opening and which is inserted into an axially parallel bore in the housing and accommodates the conveyor in its interior.

Damit ist es einerseits möglich, die erfindungsgemäße Vorrichtung jederzeit nachträglich an einem vorhandenen Schneckenextruder anzubringen, indem lediglich die Bohrung und die Ablauföffnung eingebracht werden muß. Auch läßt sich die Vorrichtung leicht entnehmen, sofern es einmal zu Funktionsstörungen kommt. Schließlich ist auch eine einfachere Abdichtung insbesondere bei Unterdruckbetrieb möglich, indem die gesamte Vorrichtung gekapselt werden kann und nachträglich eingeschoben wird.This makes it possible, on the one hand, to retrofit the device according to the invention to an existing screw extruder at any time, simply by making the bore and the drain opening. The device can also be easily removed if malfunctions occur. Finally, a simpler seal is also possible, in particular in the case of negative pressure operation, in that the entire device can be encapsulated and subsequently inserted.

Zweckmäßigerweise ist an das Rohr außerhalb des Gehäuses ein Behälter zur Aufnahme des Wasser-Feststoffgemischs angeschlossen. Der Behälter kann gegebenenfalls zugleich zur Abscheidung der Feststoffpartikel dienen.A container for holding the water-solid mixture is expediently connected to the tube outside the housing. The container can optionally also serve to separate the solid particles.

Gemäß einer besonders vorteilhaften Ausführungsform ist der Antrieb des Förderers von dem Antrieb der Schneckenwellen abgeleitet. Handelt es sich bei dem Förderer beispielsweise um eine Schraubenwendel , so ist zwischen deren Antriebswelle und den Schneckenwellen ein die Drehrichtung umkehrendes Getriebeglied angeordnet. Während die Schnecken des Extruders also in der einen Richtung arbeiten, fördert die Schraubenwelle das Abl aufmaterial in umgekehrter Richtung zur rückwärtigen Stirnseite des Gehäuses zurück. Die Ableitung des Antriebs vom Antrieb des Schneckenextruders hat den Vorteil, daß keine besonderen Explosionsschutzmaßnahmen für den Antrieb der Schraubenwendel notwendig, diese vielmehr durch den ohnehin notwendigen Explosionsschutz des Antriebs des Schnekken Extruders sichergestellt sind.According to a particularly advantageous embodiment, the drive of the conveyor is derived from the drive of the worm shafts. If the conveyor is, for example, a screw helix, a gear member reversing the direction of rotation is arranged between the drive shaft and the worm shafts. So while the screws of the extruder work in one direction, the screw shaft conveys the drainage material in the opposite direction back to the rear end of the housing. The derivation of the drive from the drive of the screw extruder has the advantage that no special explosion protection measures are required for driving the screw helix, but rather these are ensured by the explosion protection of the drive of the screw extruder which is necessary anyway.

Nachstehend ist die Erfindung anhand der Zeichnung beschrieben. I n der Zeichnung zeigen:

  • Figur 1 eine erste Ausführungsform in teilweise geschnittener Seitenansicht und
  • Figur 2 eine der Figur 1 entsprechende Darstellung einer zweiten Ausführungsform .
The invention is described below with reference to the drawing. In the drawing show:
  • Figure 1 shows a first embodiment in a partially sectioned side view
  • Figure 2 is a representation corresponding to Figure 1 of a second embodiment.

In der Zeichnung ist lediglich der Einzugsbereich eines Schneckenextruders 1 gezeigt, der als Ein- oder Mehrwellenextruder ausgebildet sein kann. Der Schneckenextruder 1 weist ein Gehäuse 2, das gegebenenfalls aus mehreren axialen Abschnitten aufgebaut ist, von denen die Zeichnung den in Förderrichtung ersten Abschnitt 3 im Einzugsbereich des Schneckenextruders zeigt. In diesem Einzugsbereich ist eine sich radial erstreckende Füllöffnung 4 angeordnet. Durch die rückwärtige Stirnseite 5 des Gehäuses ist die Antriebswelle 6 in den Innenraum 7 hineingeführt. Sie weist dort einen Förderabschnitt in Form einer Schnecke 8 auf, der eine nur geringe Preßwirkung auf das zudosierte Material ausübt. Der Scheitel 9 des Schneckengangs ist als Dichtprofil ausgebildet, während der Schneckengrund 10 eine konkave Schalenform besitzt. Die Schneckenwelle 6 wird von einem nicht näher dargestellten, explosionsgeschützten Antrieb 11 angetrieben. Vorzugsweise handelt es sich um einen Doppelwellen-Extruder, wobei die zweite Welle vor bzw. hinter der Schneckenwelle 6 liegt. Dabei kann es sich um einen Gleich- oder Gegenläufer handeln.In the drawing, only the feed area of a screw extruder 1 is shown, which can be designed as a single or multi-screw extruder. The screw extruder 1 has a housing 2, which is optionally constructed from a plurality of axial sections, of which the drawing shows the first section 3 in the feed direction in the feed region of the screw extruder. A radially extending filling opening 4 is arranged in this feed region. The drive shaft 6 is led into the interior 7 through the rear end face 5 of the housing. There it has a conveying section in the form of a screw 8, which exerts only a small pressing effect on the metered material. The apex 9 of the screw flight is designed as a sealing profile, while the screw base 10 has a concave shell shape. The worm shaft 6 is driven by an explosion-proof drive 11, not shown in detail. It is preferably a double-shaft extruder, the second shaft being located in front of or behind the screw shaft 6. This can be the same or the opposite.

Das Gehäuse 2 ist in seinem rückwärtigen Abschnitt 3 mit einer Abl auf- öffnung 12 versehen, die der Füllöffnung 4 in deren vorderem Bereich etwa gegenüberliegt. Die Ablauföffnung 12 weist eine sich nach außen konisch erweiternde Wandung 13 auf und mündet in einen zylindrischen Ablaufkanal 14, der achsparallel zu den Schneckenwellen 6 verläuft und von der rückwärtigen Stirnseite 5 des Gehäuseabschnittes 3 ausgeht. Innerhalb des Ablaufkanals 14 ist ein Förderorgan 15 in Form einer Schraubenwendel angeordnet, die an ihrem äußeren Ende über ein Getriebegl ied 16 von dem Antrieb 11 der Schneckenwellen in einer der Drehrichtung der Schnecke entgegengesetzten Richtung angetrieben wird, d. h. die Schraubenwendel 15 fördert das über die Ablauföffnung 12 in den Ablaufkanal 14 gelangende Wasser mit den Feststoffparti kein nach hinten heraus .In its rear section 3, the housing 2 is provided with a drain opening 12 which is approximately opposite the filling opening 4 in its front area. The drain opening 12 has an outwardly conically widening wall 13 and opens into a cylindrical drain channel 14 which runs axially parallel to the screw shafts 6 and extends from the rear end face 5 of the housing section 3. Within the outlet channel 14, a conveying member 15 is arranged in the form of a helical screw, which is driven at its outer end via a gear member 16 by the drive 11 of the worm shafts in a direction opposite to the direction of rotation of the worm. H. the helical coil 15 does not convey the water with the solid particles through the drain opening 12 into the drain channel 14 to the rear.

Bei der Ausführungsform gemäß Figur 2 ist der Ablaufkanal 14 von einem Rohr 17 gebildet, das in eine achsparallele Bohrung 18 des Gehäuseabschnittes 3 eingeschoben ist. Innerhalb des Rohres ist wiederum der Förderer 15 in Form einer Sctvaubenwendel angeordnet. Das Rohr 17 weist an seinem im Gehäuse befindlichen Ende eine umfangsseitige Öffnung 19 auf, die im eingeschobenen Zustand etwa unterhalb der Ablauföffnung 12 liegt. Das Rohr 17 ist außerhalb des Gehäuses 2 des Schneckenextruders 1 an einen Auffangbehälter 19' dicht angeschlossen, durch den die Antriebswelle 20 der Schraubenwendel hindurchgeführt ist. Der Auffängbehälter 19' kann gegebenenfalls unter Unterdruck stehen, der beispielsweise von einer Oel- oder Wasserstrahlpumpe erzeugt wird.In the embodiment according to FIG. 2, the drain channel 14 is formed by a tube 17 which is inserted into an axially parallel bore 18 in the housing section 3. The conveyor 15 is in turn arranged in the form of a spiral coil inside the tube. The pipe 17 has at its end in the housing a peripheral opening 19 which, when inserted, lies approximately below the drain opening 12. The tube 17 is tightly connected outside the housing 2 of the screw extruder 1 to a collecting container 19 ', through which the drive shaft 20 of the screw coil is passed. The collecting container 19 'can optionally be under negative pressure, which is generated, for example, by an oil or water jet pump.

Die erfindungsgemäße Vorrichtung kann bei entsprechender Länge und entsprechendem Aufbau der einzelnen Abschnitte der Schnecken als Extruder arbeiten, also zur unmittelbaren Erzeugung von ein oder mehr Strangprofilen aus der wasserfeuchten Masse dienen, oder aber bei kurzer Verfahrenslänge nur als Schneckenpresse arbeiten, wobei das entwässerte und plastifizierte Produkt in anschließenden Verfahrensstufen weiter verarbeitet wird.The device according to the invention can work with an appropriate length and corresponding structure of the individual sections of the screws as an extruder, that is to say for the immediate production of one or more extruded profiles from the water-moist mass, or can only work as a screw press with a short process length, the dewatered and plasticized product is further processed in subsequent process stages.

Claims (9)

1. Vorrichtung zum Entwässern und Plastifizieren von wasserfeuchten Explosivstoffgemische, z. B. Pulverrohmassen, mittels eines Schneckenextruders mit ein oder mehr Schneckenwellen mit Knet-und Förderel ementen und einem gegebenenfalls aus axialen Abschnitten zusammengesetzte Gehäuse mit einer Füllöffnung für das wasserfeuchte Explosivstoffgemisch,
dadurch gekennzeichnet,
daß im Bereich der Füllöffnung (4) ein vom Innenraum (7) des Schneckenextruders (1) ausgehender Ablaufkanal (14) für das Wasser und in diesem ein Föderer (15) zum Abführen der im abgepreßten Wasser enthaltenen Feststoffe angeordnet ist.1. Device for dewatering and plasticizing water-moist explosive mixtures, for. B. powder raw materials, by means of a screw extruder with one or more screw shafts with kneading and conveying elements and an optionally composed of axial sections housing with a filling opening for the water-moist explosive mixture,
characterized,
that in the area of the filling opening (4) an outflow channel (14) for the water starting from the interior (7) of the screw extruder (1) and in this a conveyor (15) for removing the solids contained in the squeezed water is arranged. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Ablaufkanal (14) mit dem Innenraum (7) des Schneckenextruders (1) über eine Ablauföffnung (12) verbunden ist, die sich vom Innenraum (7) zum Ablaufkanal (14) hin erweitert.2. Device according to claim 1, characterized in that the drain channel (14) with the interior (7) of the screw extruder (1) is connected via a drain opening (12) which widens from the interior (7) to the drain channel (14) . 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Förderer als Schraubenwende! (15) ausgebildet ist.3. Apparatus according to claim 1 or 2, characterized in that the conveyor as a screw turn! (15) is formed. 4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Ablaufkanal (14) unter Unterdruck steht.4. Device according to one of claims 1 to 3, characterized in that the drain channel (14) is under negative pressure. 5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Abl aufkanal ( 14) etwa paral l el zur Achse des Schneckenextruders (1) angeordnet ist und an der rückwärtigen Stirnseite (5) des Gehäuses (2) ausmündet.5. Device according to one of claims 1 to 4, characterized in that the discharge channel (14) is arranged approximately parallel to the axis of the screw extruder (1) and opens out at the rear end face (5) of the housing (2). 6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Ablaufkanal (14) von einem umfangsseitig zur Ablauföffnung (12) offenen Rohr (17) gebi Idet ist, das in eine achsparallele Bohrung (18) des Gehäuses (2) eingeschoben ist und in seinem Innenraum den Förderer (15) aufnimmt.6. Device according to one of claims 1 to 5, characterized in that the drain channel (14) from a circumferential side to the drain opening (12) open pipe (17) is formed, which in an axially parallel bore (18) of the housing (2) is inserted and receives the conveyor (15) in its interior. 7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß an das Rohr (17) außerhalb des Gehäuses (2) ein Behälter (19') zur Aufnahme des Wasser-Feststoffgemischs angeschlossen ist.7. Device according to one of claims 1 to 6, characterized in that a container (19 ') for receiving the water-solid mixture is connected to the tube (17) outside the housing (2). 8. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Antrieb des Förderers (15) von dem Antrieb (11) der Schneckenwellen (6) des Extruders (1) abgeleitet ist.8. Device according to one of claims 1 to 7, characterized in that the drive of the conveyor (15) from the drive (11) of the screw shafts (6) of the extruder (1) is derived. 9. Vorrichtung nach Anspruch 3 und 8, dadurch gekennzeichnet, daß zwischen den Schneckenwellen (6) und der Antriebswelle (20) der Schraubenwendel (15) ein die Drehrichtung umkehrendes Getriebe (16) angeordnet ist.9. The device according to claim 3 and 8, characterized in that between the worm shafts (6) and the drive shaft (20) of the screw coil (15) is arranged a reversing the direction of rotation gear (16).
EP83104884A 1982-07-05 1983-05-18 Apparatus for dehydrating and plastifying mixtures of explosives Expired EP0098371B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83104884T ATE32056T1 (en) 1982-07-05 1983-05-18 DEVICE FOR DEWATERING AND PLASTICIZING EXPLOSIVE MIXTURES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3225065 1982-07-05
DE3225065A DE3225065C1 (en) 1982-07-05 1982-07-05 Device for dewatering and plasticizing explosive mixtures

Publications (3)

Publication Number Publication Date
EP0098371A2 true EP0098371A2 (en) 1984-01-18
EP0098371A3 EP0098371A3 (en) 1985-09-11
EP0098371B1 EP0098371B1 (en) 1988-01-20

Family

ID=6167651

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104884A Expired EP0098371B1 (en) 1982-07-05 1983-05-18 Apparatus for dehydrating and plastifying mixtures of explosives

Country Status (4)

Country Link
US (1) US4493630A (en)
EP (1) EP0098371B1 (en)
AT (1) ATE32056T1 (en)
DE (2) DE3225065C1 (en)

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Publication number Priority date Publication date Assignee Title
DE3546489A1 (en) * 1985-01-03 1987-08-13 Fraunhofer Ges Forschung Apparatus for the manufacture of combustible nitrocellulose-based cartridges as a munition moulding for barrel-type weapons
DE3500067C2 (en) * 1985-01-03 1986-10-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Process for the production of combustible cases based on nitrocellulose as ammunition molded part for barrel weapons
GB8513948D0 (en) * 1985-06-03 1985-07-03 Hampton Gay S Ltd Removing liquid
US5143699A (en) * 1988-07-05 1992-09-01 Werner & Pfleiderer Corp. Mixing apparatus
DE102007051923B4 (en) * 2007-10-29 2011-03-10 Troester Gmbh & Co. Kg Apparatus and method for processing polymeric materials

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US3523331A (en) * 1968-07-30 1970-08-11 Du Pont Canada Heated extrusion vent port monitoring window
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Also Published As

Publication number Publication date
ATE32056T1 (en) 1988-02-15
US4493630A (en) 1985-01-15
EP0098371A3 (en) 1985-09-11
DE3225065C1 (en) 1983-12-15
EP0098371B1 (en) 1988-01-20
DE3375388D1 (en) 1988-02-25

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