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EP0446332B1 - Vorrichtung und verfahren zum mischen von treibladungspulver-stangen - Google Patents

Vorrichtung und verfahren zum mischen von treibladungspulver-stangen Download PDF

Info

Publication number
EP0446332B1
EP0446332B1 EP90914719A EP90914719A EP0446332B1 EP 0446332 B1 EP0446332 B1 EP 0446332B1 EP 90914719 A EP90914719 A EP 90914719A EP 90914719 A EP90914719 A EP 90914719A EP 0446332 B1 EP0446332 B1 EP 0446332B1
Authority
EP
European Patent Office
Prior art keywords
belt
loop
sticks
drums
powder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90914719A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0446332A1 (de
Inventor
Helmut Kleinhans
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
Application filed by WNC Nitrochemie GmbH, Nitrochemie Aschau GmbH filed Critical WNC Nitrochemie GmbH
Priority to AT90914719T priority Critical patent/ATE97019T1/de
Publication of EP0446332A1 publication Critical patent/EP0446332A1/de
Application granted granted Critical
Publication of EP0446332B1 publication Critical patent/EP0446332B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • 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
    • C06B21/0008—Compounding the ingredient
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/27—Mixers having moving endless chains or belts, e.g. provided with paddles, as mixing elements

Definitions

  • the invention relates to an apparatus and a method for mixing propellant powder sticks.
  • Propellant powder is conventionally produced in individual batches.
  • the properties of the propellant powder vary to a certain extent from batch to batch, since the production conditions prevailing in the production of one batch are not exactly reproducible for the production of another batch.
  • different batches of a powder type are mixed with one another.
  • US-A-2 312 444 discloses a device for mixing propellant powder grains with a flexible cloth which is freely suspended in the form of a bag for holding the powder and can be periodically raised or lowered at its three corners by means of a mechanical lever device. This periodic movement mixes the propellant powder in the cloth.
  • the present invention is based on the object of specifying an apparatus and a method for mechanically mixing propellant powder sticks.
  • propellant powder sticks or “powder sticks” within the meaning of this invention also include those propellant charge powders or powders which have a perforated, tubular, polygonal or other cross section that deviates from the usual cross-sectional shape of a "stick”.
  • the propellant powder rods are inserted with their longitudinal direction transverse to the direction of movement of the flexible band in the sagging loop formed by the band and by back and forth Movement of the belt mixed between the (loop) drums.
  • the propellant powder sticks roll lengthways one above the other and one below the other, with intensive mixing taking place. Because the length of the flexible band in the loop between the two loop or deflection drums can be changed, the bending line of the band loop can also be changed, which means that the propellant powder rods roll particularly intensely with one another and one above the other.
  • Another advantage of the device according to the invention and the method according to the invention is that the special safety requirements for handling propellant powder are met to a high degree by the automation of the mixing process.
  • the belt is closed endlessly and is guided outside the loop via at least one drive drum which can be driven in both directions of rotation, and in the other alternative the flexible belt is finally formed and runs back and forth between two winding drums which can be driven in both directions of rotation.
  • the loop drums are designed as deflection drums.
  • the device can contain switching mechanisms which detect the greatest extent of the loop, for example by a sensor below the band on its periphery.
  • a sensor can, for example, be a capacitive sensor.
  • a control device for periodically changing the loop length between a minimum and a maximum value during the reciprocating movement of the belt can advantageously be provided.
  • At least one of the two loop drums is preferably adjustable in height, so that at least one of the deflection points can be lowered or raised.
  • By lifting one of the loop drums on one side and / or by possibly simultaneously lowering the other loop drum it is possible to tension the flexible belt for an automatic emptying of the device to an inclined plane.
  • the mixed propellant powder sticks can then be loaded gently into available containers or onto further conveyor belts and other mixing devices due to the adjustable incline of the inclined plane.
  • An automatic loading of the device with powder bars is also possible by means of this development of the invention: by setting a correspondingly slight sag of the belt in its inclined plane position by extending the belt between the loop drums, the powder bars can be rolled gently into the trough formed. For the mixing process, the belt length between the loop drums is then increased further, so that a sagging loop is created again.
  • the flexible antistatic belt can be a standard conveyor belt. It can furthermore have cross studs on its side facing the inside of the loop to further promote the mixing of the propellant powder rods, which preferably have a triangular cross section.
  • a boundary wall oriented transversely to the plane of the belt is provided on both open sides of the belt loop, the mutual distance between which is selected to be somewhat larger than the length of the propellant powder rods.
  • the boundary walls advantageously prevent propellant powder rods from sliding down during the mixing process.
  • the distance between the two boundary walls can be adjusted to match the length of the powder bars and that the belt can be exchanged for a wider or narrower one, if necessary.
  • the length of the band in the loop is periodically changed between a minimum and a maximum value during the back and forth movement.
  • the minimum value of the length of the band in the loop is preferably between 40 and 50% of the maximum value of its length.
  • the weight of the inserted propellant powder rods is determined when the device is loaded and the loading process is automatically stopped as a function of a comparison to be carried out of the determined weight with the target weight of a load and the mixing process begins when the target Weight of the load is reached.
  • Fig. 1 shows a device for mixing propellant powder rods 30 with a box-shaped rollable machine frame.
  • This machine frame comprises four vertical bars, of which only the vertical bars 10, 11 are visible in this illustration.
  • the vertical spars 10, 11 and the other two vertical spars located behind them in the plane of the drawing are each connected to one another by a lower and an upper longitudinal spar 19, 20, and these longitudinal spars 19, 20 in turn take pairs between them by means of upper guide rods 23 and lower guide rods 24 two cross bars 21, 22 each (Fig. 2).
  • the vertical bars are equipped with rollers 12 on the bottom.
  • the loop drums 2, 3 are mounted on the vertical bars 10, 11 and on the vertical bars behind them, which are designed as deflection rollers for the flexible band 1 which sags in a loop between the loop drums 2, 3.
  • the flexible belt 1 is designed as a finite belt and runs directly over each deflection drum 2, 3 to a winding drum 4, 5, which are arranged on the transverse sides of the machine frame.
  • the winding drums 4, 5 can be driven - preferably at different peripheral speeds - via drives 6, 7 also arranged on the transverse side of the machine frame.
  • the drives 6, 7 are designed as frequency-controlled, explosion-proof motors of commercial design with a high transmission ratio and are connected to the winding drums 4, 5 via a belt drive.
  • a chain drive can also be used as an alternative to the belt drive.
  • the flexible band 1 runs from its one end, wound on the winding drum 4, over the deflection or loop drum 2 to form a bending line and is supported on the upper cross members 21, over the other deflection or loop drum 3 to the second Winding drum 5. If the winding drums 4, 5 are driven at different circumferential speeds, the flexible band 1 is lengthened or shortened and the periphery of the bending line of the flexible band 1 moves in the vertical direction between a maximum and a minimum value. Depending on the filling of the flexible band 1 and depending on its length, it may be based on the lower cross members 22 (Fig. 2).
  • the flexible band 1 can be equipped on its side facing the inside of the loop with cross studs 31 which promote the mixing of the inserted powder bars 30.
  • the lateral boundary walls 8, 9 On each of the two open sides of the belt loop 1 there is a boundary wall 8, 9 which is oriented transversely to the plane of the belt 1 and which can be displaced in the transverse direction on the upper and lower guide rods 23, 24 (FIG. 2), thereby adjusting their lateral spacing is variable to different lengths of the propellant powder rods 30.
  • the lateral boundary walls 8, 9 On the bottom side, the lateral boundary walls 8, 9 essentially have a shape adapted to the sagging loop of the flexible band 1.
  • the deflection or loop drum 3 is designed to be movable in the vertical direction by means of a drive which, for example, is accommodated in the vertical spar 11 and consists of a hydraulic piston / cylinder arrangement 13, 14 .
  • the vertical adjustability of the deflection drum 3 makes it possible to tension the flexible belt 1 to an inclined plane for discharge purposes, which is shown in FIG. 1 by the broken line of the deflection drum 3 'and the belt 1'.
  • the propellant powder rods 30 can roll laterally from the belt 1' into the containers provided or onto further conveyor belts.
  • FIG. 2 shows a view of the device in viewing direction X of FIG. 1.
  • the bearings 18 for the deflection drum 3 rest on the two adjacent vertical bars 11, 11 ', which can be moved vertically in the direction of arrow 26 by a drive described above by way of example.
  • the upper cross member 21 is located, which is connected to the longitudinal beam 19 (FIG. 1) by means of the upper guide rod 23.
  • the bearings 15 for the winding drum, which receives one end of the flexible band 1, are fastened to the vertical bars 11, 11 '.
  • the winding drum 5 has on its drive side a pulley 16 which is operatively connected via a belt to an underlying pulley 17 of the drive 7, which is attached to the vertical beam 11.
  • the lateral boundary walls 8, 9 can be displaced axially on the upper and lower guide rods 23, 24 into the positions shown in broken lines in the arrow direction 25 by the reference symbols 8 ', 9'.
  • the radial flanges 27, 28 can be moved axially on the deflection drums 2, 3 or on the winding drums 4, 5, likewise in the direction of arrow 25.
  • the two drives 6, 7 are connected to a control device for periodically changing the loop length between a minimum and a maximum value during the back and forth movement of the belt.
  • the method according to the invention for mixing propellant powder sticks is described with the aid of the device explained above and preferably proceeds as follows: First, the powder bars 30 are inserted into the upwardly open and freely sagging loop of the flexible belt 1 in such a way that the longitudinal extension of the powder bars 30 extends transversely to the direction of movement of the belt 1 in the loop. During the loading process, the weight of the powder bars 30 loaded is determined by means of a corresponding device (not explained in more detail here) and the loading process is stopped when the target weight of a batch has been reached.
  • the flexible belt 1 executes a movement which is composed of a superposition of two basic movements.
  • the first basic movement of the belt 1 is generated in that the winding drums 4, 5 with the same winding speed turn and one winding drum winds up the tape 1, while the other winding drum unwinds the tape 1.
  • the belt 1 runs at a constant belt speed while maintaining the loop shape between the two deflection drums 2, 3-.
  • the direction of movement of the strip 1 is automatically reversed.
  • the second basic movement of the flexible band 1 is that both winding drums 4, 5 wind up or both, whereupon the length of the band between the two deflection drums 2, 3 shortens or lengthens and the loop changes its bending line in a vertical direction executes.
  • appropriate measuring and reversing devices ensure that the belt 1 is not completely tightened during the mixing process or does not touch the ground.
  • the resulting movement used in the mixing process is generated in that one of the winding drums 4, 5 winds up the band 1, while the other unwinds the band, the two winding drums 4, 5 rotating at different winding speeds.
  • the result is that the belt 1 moves according to the first basic movement, but at the same time the loop is shortened or lengthened by the different winding speeds of the winding drums 4, 5, that is to say moves in the vertical direction.
  • the second basic movement is realized in that the winding drums 4, 5 perform a winding or unwinding of the tape 1 due to their different winding speeds.
  • the shortening or lengthening of the loop - corresponding to the second basic movement - has a shorter period than the back and forth movement of the band 1 in the loop corresponding to the first basic movement.
  • the period for shortening or lengthening the loop is 30 seconds
  • the period for the back and forth movement of belt 1 is 3 minutes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Accessories For Mixers (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Auxiliary Methods And Devices For Loading And Unloading (AREA)
  • Toys (AREA)
  • Basic Packing Technique (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Nozzles (AREA)
  • Manufacturing And Processing Devices For Dough (AREA)
EP90914719A 1989-09-08 1990-08-29 Vorrichtung und verfahren zum mischen von treibladungspulver-stangen Expired - Lifetime EP0446332B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90914719T ATE97019T1 (de) 1989-09-08 1990-08-29 Vorrichtung und verfahren zum mischen von treibladungspulver-stangen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3930014 1989-09-08
DE3930014 1989-09-08
DE4012523 1990-04-19
DE4012523A DE4012523C1 (es) 1989-09-08 1990-04-19

Publications (2)

Publication Number Publication Date
EP0446332A1 EP0446332A1 (de) 1991-09-18
EP0446332B1 true EP0446332B1 (de) 1993-11-10

Family

ID=25884941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90914719A Expired - Lifetime EP0446332B1 (de) 1989-09-08 1990-08-29 Vorrichtung und verfahren zum mischen von treibladungspulver-stangen

Country Status (19)

Country Link
US (2) US5290100A (es)
EP (1) EP0446332B1 (es)
JP (1) JP2533814B2 (es)
KR (1) KR940006016B1 (es)
CN (1) CN1050013A (es)
AR (1) AR246730A1 (es)
AU (1) AU634593B2 (es)
BR (1) BR9006907A (es)
CA (1) CA2041649C (es)
DE (1) DE4012523C1 (es)
EG (1) EG18991A (es)
ES (1) ES2048504T3 (es)
FI (1) FI93617C (es)
GR (1) GR1000882B (es)
IE (1) IE62573B1 (es)
IL (1) IL95435A (es)
NO (1) NO178017C (es)
PT (1) PT95224B (es)
WO (1) WO1991003314A1 (es)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5641263A (en) * 1996-01-19 1997-06-24 Vulcan Tool Corporation Bundle unscrambler
US6548610B2 (en) * 2000-10-06 2003-04-15 Univation Technologies, Llc Method and apparatus for reducing static charges during polymerization of olefin polymers
US6905654B2 (en) 2000-10-06 2005-06-14 Univation Technologies, Llc Method and apparatus for reducing static charges during polymerization of olefin polymers
US20050232995A1 (en) 2002-07-29 2005-10-20 Yam Nyomi V Methods and dosage forms for controlled delivery of paliperidone and risperidone
US8256354B2 (en) * 2009-03-02 2012-09-04 Georgetown Rail Equipment Company Side dump and bottom dump railroad cars
CN111470923B (zh) * 2020-04-20 2021-07-27 西安近代化学研究所 一种星孔推进剂药柱缠绕包覆用中心轴

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE52342C (de) * W. jenisch in Bromberg, Wilhelmstrafse Nr. 76 Mischvorrichtung
DE291532C (es) *
DE169192C (es) *
US2312444A (en) * 1942-04-20 1943-03-02 Hercules Powder Co Ltd Mixing machine
US2426249A (en) * 1943-11-10 1947-08-26 John A Taylor Mixing mat
CH303600A (de) * 1951-07-09 1954-12-15 Marie Van Daelen Felix Louis Mischmaschine für Beton oder ähnliches Material.
US2991050A (en) * 1958-08-25 1961-07-04 Jay Dee Products Co Inc Method and apparatus for mixing articles
DE1127811B (de) * 1961-11-11 1962-04-12 Buckau Wolf Maschf R Einrichtung zur Herstellung einer gleichmaessigen Mischung von festen Brennstoffen unterschiedlicher Beschaffenheit
US3200966A (en) * 1962-12-11 1965-08-17 Magnaflux Corp Rapid transverse unloading mechanism
BE636354A (es) * 1962-12-19
US3217899A (en) * 1963-12-11 1965-11-16 Magnaflux Corp Slab turning apparatus
US3506142A (en) * 1969-01-22 1970-04-14 Automation Development Corp Bundle unscrambler for bar feeders
US3643379A (en) * 1970-03-16 1972-02-22 Richardson Co Continuous graining and apparatus therefor
DE2234441C2 (de) * 1972-07-13 1985-10-31 Untertage Maschinenfabrik Dudweiler Gmbh, 6602 Dudweiler Vorrichtung zum Vereinzeln und Quertransport von Stab- oder Rohrmaterial
US3931896A (en) * 1975-01-24 1976-01-13 Atlas Automation, Inc. Bar unscrambler
US4103883A (en) * 1977-09-14 1978-08-01 Shepherd Machinery Company Adjustable supporting structure
DE2918840A1 (de) * 1979-05-10 1980-11-20 Bosch Gmbh Robert Speicherfoerderer
DE3040946C2 (de) * 1980-10-30 1985-08-01 Johann Wolf Gmbh Kg, Scharnstein, Oberoesterreich Futtermischeinrichtung
JPS59176638U (ja) * 1983-05-16 1984-11-26 大石　知樹 粉粒体用撹拌器
AU570982B2 (en) * 1983-07-05 1988-03-31 Monier Ltd. Concrete mixer
DE3448542C2 (de) * 1984-12-11 1996-03-28 Hastem Mueller Hugo Stefan Lattenförderband für Lattenförderer
JPH0511402Y2 (es) * 1985-04-01 1993-03-22
US4697689A (en) * 1985-12-26 1987-10-06 Rca Corporation Article manipulation system

Also Published As

Publication number Publication date
US5290100A (en) 1994-03-01
NO178017B (no) 1995-10-02
FI93617C (fi) 1995-05-10
IE62573B1 (en) 1995-02-08
WO1991003314A1 (de) 1991-03-21
CN1050013A (zh) 1991-03-20
AU634593B2 (en) 1993-02-25
ES2048504T3 (es) 1994-03-16
AR246730A1 (es) 1994-09-30
US5346304A (en) 1994-09-13
FI93617B (fi) 1995-01-31
PT95224A (pt) 1992-03-31
IL95435A (en) 1994-11-11
PT95224B (pt) 1998-06-30
NO178017C (no) 1996-01-10
NO911791L (no) 1991-05-07
CA2041649C (en) 1994-06-28
IL95435A0 (en) 1991-07-18
KR940006016B1 (ko) 1994-07-02
GR900100603A (en) 1992-01-20
EP0446332A1 (de) 1991-09-18
NO911791D0 (no) 1991-05-07
BR9006907A (pt) 1991-10-01
AU6515590A (en) 1991-04-08
JPH03504829A (ja) 1991-10-24
JP2533814B2 (ja) 1996-09-11
DE4012523C1 (es) 1990-12-20
EG18991A (en) 1994-10-30
GR1000882B (el) 1993-03-16
IE903085A1 (en) 1991-03-13
FI912214A0 (fi) 1991-05-08
KR920700755A (ko) 1992-08-10

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