EP0098371B1 - Apparatus for dehydrating and plastifying mixtures of explosives - Google Patents
Apparatus for dehydrating and plastifying mixtures of explosives Download PDFInfo
- Publication number
- EP0098371B1 EP0098371B1 EP83104884A EP83104884A EP0098371B1 EP 0098371 B1 EP0098371 B1 EP 0098371B1 EP 83104884 A EP83104884 A EP 83104884A EP 83104884 A EP83104884 A EP 83104884A EP 0098371 B1 EP0098371 B1 EP 0098371B1
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- European Patent Office
- Prior art keywords
- water
- screw extruder
- conveyor
- discharge channel
- screw
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- 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.)
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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
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- 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, e.g. Powder raw materials, by means of a screw extruder with one or more screw shafts with kneading and conveying elements, a housing, possibly made up of axial sections, with a filling opening for the water-moist explosive mixture and an outlet opening arranged in its area, starting from the interior of the screw extruder, and a subsequent outlet channel for the water.
- a device for dewatering and plasticizing water-moist explosive mixtures e.g. Powder raw materials
- a housing possibly made up of axial sections, with a filling opening for the water-moist explosive mixture and an outlet opening arranged in its area, starting from the interior of the screw extruder, and a subsequent outlet channel for the water.
- Explosive mixtures e.g. fibrous powder raw materials consisting of nitrocellulose and nitroglycerin, but also peroxide-containing materials are processed in a water-moist state for safety reasons, e.g. plasticized.
- Dewatering and plasticizing are mostly carried out today with screw extruders (DE-B 28 25 567, DE-A 30 44 577), which not only enable continuous work, but also perfect processing by using defined screw geometries and a defined temperature profile over the length of the screw extruder enable. It is known to work with single or multi-shaft extruders.
- the screw 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 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 first-mentioned disadvantage can be remedied in the known device forming the preamble of claim 1 (for example from DE-A-2446021) in that a suction nozzle for suctioning the water is arranged in the region of the filling opening.
- the invention is based on the object of designing a screw extruder of the construction described at the outset in such a way 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 the drain opening widens from the interior to the drain channel and in that a conveyor for removing the solids contained in the squeezed water is arranged.
- the conveyor is a screw coil, e.g. formed from a thick steel wire, thereby avoiding that a noteworthy pressure is exerted on the solid particles in the drainage channel even if they accumulate in large quantities.
- a noteworthy pressure is exerted on the solid particles in the drainage channel even if they accumulate in large quantities.
- clogging of the drainage channel is practically impossible.
- 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 open on the circumferential side to the drain opening, which is inserted into an axially parallel bore in the housing and receives 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 necessary for driving the screw helix, but rather are ensured by the explosion protection of the drive of the screw extruder that 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 made up of a plurality of axial sections, of which the drawing shows the first section 3 in the feed direction 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 is provided in its rear section 3 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 element 15 in the form of a screw spiral is arranged within the outlet channel 14 and is driven at its outer end via a gear member 16 by the drive 11 of the screw shafts in a direction opposite to the direction of rotation of the screw, i.e. the helical coil 15 conveys the water reaching the drain channel 14 through the drain opening 12 with the solid particles 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 helical coil within the tube.
- the tube 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.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
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 Knet- und Förderelementen, einem ggf. aus axialen Abschnitten zusammengesetzten Gehäuse mit einer Füllöffnung für das wasserfeuchte Explosivstoffgemisch und einer in deren Bereich angeordneten, vom Innenraum des Schneckenextruders ausgehenden Ablauföffnung und einem daran anschließenden Ablaufkanal für das Wasser.The invention relates to a device for dewatering and plasticizing water-moist explosive mixtures, e.g. Powder raw materials, by means of a screw extruder with one or more screw shafts with kneading and conveying elements, a housing, possibly made up of axial sections, with a filling opening for the water-moist explosive mixture and an outlet opening arranged in its area, starting from the interior of the screw extruder, and a subsequent outlet channel for the water.
Explosivstoffgemische, z.B. faserige Pulverrohmassen, die aus Nitrozellulose und Nitroglyzerin bestehen, aber auch peroxidhaltige Massen werden aus sicherheitstechnischen Gründen in wasserfeuchtem Zustand verarbeitet, z.B. plastifiziert. Das Entwässern und Plastifizieren erfolgt heute zumeist mit Schneckenextrudern (DE-B 28 25 567, DE-A 30 44 577), die nicht nur ein kontinuierliches Arbeiten ermöglichen, sondern durch Einsatz definierter Schneckengeometrien und eines definierten Temperaturverlaufs über die Länge des Schneckenextruders eine einwandfreie Verarbeitung ermöglichen. Dabei es es bekannte, mit Ein- oder Mehrwellenextrudern 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.Explosive mixtures, e.g. fibrous powder raw materials consisting of nitrocellulose and nitroglycerin, but also peroxide-containing materials are processed in a water-moist state for safety reasons, e.g. plasticized. Dewatering and plasticizing are mostly carried out today with screw extruders (DE-B 28 25 567, DE-A 30 44 577), which not only enable continuous work, but also perfect processing by using defined screw geometries and a defined temperature profile over the length of the screw extruder enable. It is known to work with single or multi-shaft extruders. The screw 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.
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.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 Schneckenextrudern 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 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. Der erstgenannte Nachteil kann bei der den Oberbegriff des Anspruchs 1 bildenden bekannten Vorrichtung (zum Beispiel aus DE-A-2446021) dadurch behoben werden, daß im Bereich der Füllöffnung eine Absaugdüse zum Absaugen des Wassers angeordnet ist. Aufgrund des Unterdruckes können aber auch die anderen flüssigen Komponenten, z.B. Nitroglyzerin, ausgetragen werden, das dann zu einem unkontrollierten Sicherheitsrisiko wird. Zugleich tritt in einem solchen Fall eine Verfälschung der Rezeptur ein. Ein weiterer Nachteil der bekannten Vorrichtung besteht darin, daß im Einlaufbereich der Absaugdüse ein Sieb oder Filter angeordnet ist, um das Absaugen von Feststoffen, insbesondere der faserigen Nitrozellulose zu vermeiden. Diese Sieb wird während des Betriebs von den Feststoffen zwangsläufig verlegt, so daß es trotz der Absaugdüse zu einem Wasser-Rückstau und damit zu den vorgenannten Nachteilen, wie Bildung einer Aufschlämmung im Einzugsbereich, kommen kann.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. The first-mentioned disadvantage can be remedied in the known device forming the preamble of claim 1 (for example from DE-A-2446021) in that a suction nozzle for suctioning the water is arranged in the region of the filling opening. Due to the negative pressure, the other liquid components, e.g. Nitroglycerin, which is then an uncontrolled security risk. At the same time, the recipe is falsified in such a case. Another disadvantage of the known device is that a sieve or filter is arranged in the inlet area of the suction nozzle in order to avoid the suction of solids, in particular the fibrous nitrocellulose. This sieve is inevitably moved by the solids during operation, so that despite the suction nozzle there can be a water backlog and thus the aforementioned disadvantages, such as the formation of a slurry in the feed area.
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 is based on the object of designing a screw extruder of the construction described at the outset in such a way 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 die Ablauföffnung sich vom Innenraum zum Ablaufkanal hin erweitert und daß in diesem ein Förderer zum Abführen der im abgepreßten Wasser enthaltenen Feststoffe angeordnet ist.This object is achieved in that the drain opening widens from the interior to the drain channel and in that a conveyor for removing the solids contained in the squeezed water is arranged.
Durch die Erweiterung der Ablauföffnung vom Innenraum zum Ablaufkanal wird der Verstopfungsgefahr im Bereich der Ablauföffnung vorgebeugt. Allenfalls in die Ablauföffnung gelangende Feststoffpartikel können sich aufgrund der Erweiterung nicht verfangen, sondern gelangen in den Ablaufkanal. Dort 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 zurückgenommen werden. 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 Feststoffanteil von <1% im Ablaufwasser festgestellt werden.By expanding the drain opening from the interior to the drain channel, the risk of clogging in the area of the drain opening is prevented. Any solid particles that get into the drain opening cannot get caught due to the expansion, but rather get into the drain channel. There, even if only in small amounts, the solid particles contained in the discharge water are transported away together with the squeezed water by means of the conveyor, so that, as practical tests have shown, no more slurries can be seen in the feed area. The solid particles contained in the drain can of course be taken back. The discharge of solids through the discharge opening can be adjusted by a corresponding screw geometry in the extruder, e.g. keep to a minimum thanks to a concave shell geometry with sealing profile. In practice, a solids content of <1% in the drain water was found.
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 Verstopfen des Ablaufkanals praktisch unmöglich.In a particularly simple version, the conveyor is a screw coil, e.g. formed from a thick steel wire, thereby avoiding that a noteworthy pressure is exerted on the solid particles in the drainage channel even if they accumulate in large quantities. In addition, because of the large free cross sections of the screw coil, clogging of the drainage channel is practically impossible.
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 embodiment For example, it is provided that the drain channel is formed by a tube open on the circumferential side to the drain opening, which is inserted into an axially parallel bore in the housing and receives 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 Ablaufmaterial im 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 Schnecken 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 necessary for driving the screw helix, but rather are ensured by the explosion protection of the drive of the screw extruder that is necessary anyway.
Nachstehend ist die Erfindung anhand der Zeichnung beschrieben. In der Zeichnung zeigen:
Figur 1 eine erste Ausführungsform in teilweise geschnittener Seitenansicht und- Figur 2 eine der
Figur 1 entsprechende Darstellung einer zweiten Ausführungsform.
- 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
Das Gehäuse 2 ist in seinem rückwärtigen Abschnitt 3 mit einer Ablauföffnung 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 Getriebeglied 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 Feststoffpartikeln nach hinten heraus.The housing 2 is provided in its
Bei der Ausführungsform gemäß Figur 2 ist der Ablaufkanal 14von 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 Schraubenwendel 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 Auffangbehälter 19' kann gegebenenfalls unter Unterdruck stehen, der beispielsweise von einer Oel- oder Wasserstrahlpumpe erzeugt wird.In the embodiment according to FIG. 2, the
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 Stangprofilen 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 (8)
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 EP0098371A2 (en) | 1984-01-18 |
| EP0098371A3 EP0098371A3 (en) | 1985-09-11 |
| EP0098371B1 true 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) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3546489A1 (en) * | 1985-01-03 | 1987-08-13 | Fraunhofer Ges Forschung | DEVICE FOR THE PRODUCTION OF COMBUSTIBLE NITROCELLULOSE-BASED SLEEVES AS AN AMMUNITION MOLDED PART FOR TUBE ARMS |
| 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 |
| RU2203256C2 (en) * | 2000-10-17 | 2003-04-27 | Государственный научно-исследовательский институт химических продуктов | Cellulose nitrate dehydration method |
| DE102007051923B4 (en) * | 2007-10-29 | 2011-03-10 | Troester Gmbh & Co. Kg | Apparatus and method for processing polymeric materials |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB110035A (en) * | 1916-10-16 | 1917-10-11 | John Clarkson Fiddyment | Improvements in and relating to Power Presses for Extracting Fluids from Vegetable Matter or other Material. |
| FR637146A (en) * | 1926-10-29 | 1928-04-24 | Pressoirs Mabille | Improvements to crushers and destemmers |
| US2615199A (en) * | 1945-05-15 | 1952-10-28 | Welding Engineers | Material treating apparatus |
| DE1048212B (en) * | 1957-08-09 | 1958-12-31 | Dynamit Nobel Ag | Device for the continuous production of gunpowder and propellants |
| US2961701A (en) * | 1958-08-01 | 1960-11-29 | Welding Engineers | Extrusion apparatus |
| BE597604A (en) * | 1959-12-01 | 1900-01-01 | ||
| DE1779922A1 (en) * | 1961-02-17 | 1972-01-13 | Internat Basic Economy Corp | Device for removing fluids from elastomers |
| US3375549A (en) * | 1961-04-05 | 1968-04-02 | Uniroyal Inc | Method and apparatus for refining and separating plastic materials |
| US3371379A (en) * | 1965-01-02 | 1968-03-05 | Reifenhauser K G | Apparatus for degassing thermoplastic material in screw presses |
| US3535737A (en) * | 1967-07-28 | 1970-10-27 | Borg Warner | Plasticizing apparatus with volatile withdrawal system |
| US3523331A (en) * | 1968-07-30 | 1970-08-11 | Du Pont Canada | Heated extrusion vent port monitoring window |
| SE424545B (en) * | 1973-09-26 | 1982-07-26 | Bofors Ab | SET TO MAKE A STRING SIZE POWDER |
| GB1524088A (en) * | 1976-10-07 | 1978-09-06 | Borovikova S M Lurie E V | Machines for processing polymer compositions by melting |
| DE2645312A1 (en) * | 1976-10-07 | 1978-04-13 | Geb Piskunova Sofia Borovikova | Screw-operated, plasticising unit for polymer processing - uses reduced pressure for conveying holding cpd. from reservoir to screw |
| DE3013091A1 (en) * | 1980-04-03 | 1981-10-08 | Dambach-Industrieanlagen Gmbh, 7560 Gaggenau | Rubbish dewatering and compressing mechanism - has auger housing joining onto outlet cone with elongated holes |
| DE3044577C2 (en) * | 1980-11-26 | 1982-11-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Process and device for the continuous production of propellant charge powder |
-
1982
- 1982-07-05 DE DE3225065A patent/DE3225065C1/en not_active Expired
-
1983
- 1983-05-18 EP EP83104884A patent/EP0098371B1/en not_active Expired
- 1983-05-18 DE DE8383104884T patent/DE3375388D1/en not_active Expired
- 1983-05-18 AT AT83104884T patent/ATE32056T1/en not_active IP Right Cessation
- 1983-05-23 US US06/496,868 patent/US4493630A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE3375388D1 (en) | 1988-02-25 |
| EP0098371A3 (en) | 1985-09-11 |
| US4493630A (en) | 1985-01-15 |
| EP0098371A2 (en) | 1984-01-18 |
| DE3225065C1 (en) | 1983-12-15 |
| ATE32056T1 (en) | 1988-02-15 |
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