EP0098371A2 - Dispositif pour déshydrater et rendre plastiques des mélanges d'explosifs - Google Patents

Dispositif pour déshydrater et rendre plastiques des mélanges d'explosifs Download PDF

Info

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
Authority
EP
European Patent Office
Prior art keywords
water
screw
screw extruder
housing
conveyor
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
EP83104884A
Other languages
German (de)
English (en)
Other versions
EP0098371B1 (fr
EP0098371A3 (en
Inventor
Dietmar Dr. Dipl.- Chem. Müller
Hiltmar Dr. Dr. Rer. Nat. Schubert
Rudolf Kröhnert
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.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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
Application filed by Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Priority to AT83104884T priority Critical patent/ATE32056T1/de
Publication of EP0098371A2 publication Critical patent/EP0098371A2/fr
Publication of EP0098371A3 publication Critical patent/EP0098371A3/de
Application granted granted Critical
Publication of EP0098371B1 publication Critical patent/EP0098371B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • C06B21/0033—Shaping the mixture
    • C06B21/0075—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.
EP83104884A 1982-07-05 1983-05-18 Dispositif pour déshydrater et rendre plastiques des mélanges d'explosifs Expired EP0098371B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83104884T ATE32056T1 (de) 1982-07-05 1983-05-18 Vorrichtung zum entwaessern und plastifizieren von explosivstoffgemischen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3225065 1982-07-05
DE3225065A DE3225065C1 (de) 1982-07-05 1982-07-05 Vorrichtung zum Entwaessern und Plastifizieren von Explosivstoffgemischen

Publications (3)

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

Family

ID=6167651

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104884A Expired EP0098371B1 (fr) 1982-07-05 1983-05-18 Dispositif pour déshydrater et rendre plastiques des mélanges d'explosifs

Country Status (4)

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

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3500067C2 (de) * 1985-01-03 1986-10-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Verfahren zur Herstellung verbrennbarer Hülsen auf Nitrozellulose-Basis als Munitionsformteil für Rohrwaffen
DE3546489A1 (de) * 1985-01-03 1987-08-13 Fraunhofer Ges Forschung Vorrichtung zur herstellung verbrennbarer huelsen auf nitrozellulose-basis als munitionsformteil fuer rohrwaffen
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 (de) * 2007-10-29 2011-03-10 Troester Gmbh & Co. Kg Vorrichtung und Verfahren zur Verarbeitung polymerer Werkstoffe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR483979A (fr) * 1916-10-16 1917-08-23 John Clarkson Fiddyment Presse mécanique pour l'extraction de fluides de matières végétales ou autres par compression
FR637146A (fr) * 1926-10-29 1928-04-24 Pressoirs Mabille Perfectionnements aux fouloirs-égrappoirs
US3523331A (en) * 1968-07-30 1970-08-11 Du Pont Canada Heated extrusion vent port monitoring window
DE2446021A1 (de) * 1973-09-26 1975-04-03 Bofors Ab Verfahren zum formen von pulver, insbesondere von schiess- oder sprengpulver
US4130901A (en) * 1976-10-07 1978-12-19 Borovikova Sofia M Plastication arrangement in a machine for processing polymeric materials

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2615199A (en) * 1945-05-15 1952-10-28 Welding Engineers Material treating apparatus
US2961701A (en) * 1958-08-01 1960-11-29 Welding Engineers Extrusion apparatus
BE597604A (fr) * 1959-12-01 1900-01-01
DE1779922A1 (de) * 1961-02-17 1972-01-13 Internat Basic Economy Corp Vorrichtung zum Entfernen von Fluessigkeit aus Elastomeren
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
DE2645312A1 (de) * 1976-10-07 1978-04-13 Geb Piskunova Sofia Borovikova Plastizierungsbaugruppe in der anlage zur verarbeitung von polymermaterialien
DE3013091A1 (de) * 1980-04-03 1981-10-08 Dambach-Industrieanlagen Gmbh, 7560 Gaggenau Vorrichtung zum entwaessern und verdichtung von rechengut, muell o.dgl.
DE3044577C2 (de) * 1980-11-26 1982-11-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Verfahren und Vorrichtung zur kontinuierlichen Herstellung von Treibladungspulver

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR483979A (fr) * 1916-10-16 1917-08-23 John Clarkson Fiddyment Presse mécanique pour l'extraction de fluides de matières végétales ou autres par compression
FR637146A (fr) * 1926-10-29 1928-04-24 Pressoirs Mabille Perfectionnements aux fouloirs-égrappoirs
US3523331A (en) * 1968-07-30 1970-08-11 Du Pont Canada Heated extrusion vent port monitoring window
DE2446021A1 (de) * 1973-09-26 1975-04-03 Bofors Ab Verfahren zum formen von pulver, insbesondere von schiess- oder sprengpulver
US4130901A (en) * 1976-10-07 1978-12-19 Borovikova Sofia M Plastication arrangement in a machine for processing polymeric materials

Also Published As

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

Similar Documents

Publication Publication Date Title
DE102005014171B4 (de) Extruder mit konischer Doppelschraube, Entwässerungsvorrichtung und deren Verwendung
EP0600924B1 (fr) Dispositif pour l'extrusion de produits thermoplastiques
AT413512B (de) Vorrichtung zur aufbereitung von kunststoffmaterial zu recyclingzwecken
DE2012645A1 (de) Vorrichtung zum Extrudieren von schwer extrudierbaren Materialien, insbesondere von Kunststoffabfällen
DE2158246B2 (de) Vorrichtung zum Aufbereiten und Strangpressen von thermoplastischen Kunststoffen
DE2548490A1 (de) Schneckenextruder
AT413511B (de) Vorrichtung zur aufbereitung von kunststoffmaterial zu recyclingzwecken
DE4126390A1 (de) Misch- und aufbereitungsvorrichtung mit austragspumpe
EP1434679B1 (fr) Extrudeuse annulaire a elements de refoulement a contreforts partiels dans la zone d'alimentation
DE3225065C1 (de) Vorrichtung zum Entwaessern und Plastifizieren von Explosivstoffgemischen
EP3564005A1 (fr) Machine de mélange et de malaxage
DE102012010854B4 (de) Einschneckenextruder mit Wellenschnecke und genutetem Gehäuse
EP1502724B1 (fr) Filtre pour machines de traitement, spécialement extrudeuses
EP0747546B1 (fr) Appareil et procédé pour enlever les déchets de l'eau
DE3044577C2 (de) Verfahren und Vorrichtung zur kontinuierlichen Herstellung von Treibladungspulver
DE19852493B4 (de) Extruder mit Entgasung
DE3428381A1 (de) Verfahren und schneckenpresse zum verdichten und entwaessern von festmaterial
DE19504272C2 (de) Schlaufenmischer
DE1166460B (de) Schneckenpresse mit zwanglaeufiger Foerderung in der Einzugszone
DE202007013114U1 (de) Extrudereinrichtung
EP1118447B1 (fr) Appareil pour l'alimentation de matériaux élastomériques, utilisation d'un tel appareil et deux méthodes opératoires
DE1912321C (de) Vorrichtung zum Plastifizieren von Kunststoffgranulat
DE1288780B (de) Vorrichtung zum Plastifizieren von thermoplastischen Kunststoffen
DE19935332C1 (de) Fördervorrichtung, insbesondere für cellulosehaltiges Gut
AT311656B (de) Strangpresse

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19850914

17Q First examination report despatched

Effective date: 19860528

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 32056

Country of ref document: AT

Date of ref document: 19880215

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3375388

Country of ref document: DE

Date of ref document: 19880225

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: DR. ING. A. RACHELI & C.

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 83104884.8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19990521

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19990525

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19990531

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000518

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000531

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20000718

Year of fee payment: 18

BERE Be: lapsed

Owner name: FRAUNHOFER G.- ZUR FORDERUNG DER ANGEWANDTEN FORS

Effective date: 20000531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20001201

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020301

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020507

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20020523

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20020524

Year of fee payment: 20

Ref country code: FR

Payment date: 20020524

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20030517

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20030517

Ref country code: CH

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20030517

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed