EP0365814B1 - Process and device for mixing powdered to granulated bulk materials - Google Patents

Process and device for mixing powdered to granulated bulk materials Download PDF

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Publication number
EP0365814B1
EP0365814B1 EP89116940A EP89116940A EP0365814B1 EP 0365814 B1 EP0365814 B1 EP 0365814B1 EP 89116940 A EP89116940 A EP 89116940A EP 89116940 A EP89116940 A EP 89116940A EP 0365814 B1 EP0365814 B1 EP 0365814B1
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EP
European Patent Office
Prior art keywords
mixing
mixing vessel
starting position
pivoted
bulk material
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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.)
Expired - Lifetime
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EP89116940A
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German (de)
French (fr)
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EP0365814A1 (en
Inventor
Michael Derksen
Joachim Domke
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Dr Herfeld GmbH and Co KG
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Dr Herfeld GmbH and Co KG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/808—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers driven from the bottom of the receptacle
    • 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
    • B01F33/35—Mixing after turning the mixing vessel upside down
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F35/32—Driving arrangements
    • B01F35/321—Disposition of the drive
    • B01F35/3213—Disposition of the drive at the lower side of the axis, e.g. driving the stirrer from the bottom of a receptacle

Definitions

  • EP-A-225 495 discloses a mixing device with a mixing container which can be assembled from two container parts and which is pivoted from a vertical starting position about a horizontal pivot axis through 180 ° into its mixing position and, after the mixing process has ended, is pivoted back again through 180 ° into its starting position can.
  • the special feature of this known mixing device is seen in the fact that a drivable mixing tool can be releasably coupled via its hub to the drive shaft of a drive motor, the first, transportable container part also carrying the lid-like second container part together with the mixing tool in the transport state.
  • the invention has for its object to develop a method according to the preamble of claim 1 and a mixing device according to the preamble of claim 5 so that on the one hand the throughput of the mixing device is further increased, but on the other hand the mixing container when swiveling back from the mixing position, the starting position with a large Precision achieved (which is crucial for the perfect functioning of the mixing device, especially for connecting and disconnecting the two mixing container parts).
  • the mixing device 1 also contains a stationary second mixing container part 4, which is held on a pivot drive 5 and can thus be pivoted about a horizontal pivot axis 6, as will be explained in detail later.
  • Mixing tools 7 are arranged in the bowl-shaped second mixing container part 4, which are also known per se, and can be driven in rotation by a separate drive unit 8 about the container axis 9 vertical in the starting position of the mixing device 1.
  • the first mixing container part 2 filled with a bulk material batch is moved under the second mixing container part 4 which is open in the starting position in such a way that the vertical central axes of both mixing container parts 2, 4 coincide with the container axis 9, the first mixing container part 2 still being supported on the moving pallet 3 which, for the purpose of aligning the first, now lower, mixing container part 2 with respect to the now upper, second mixing container part 4, is received in a kind of fork 10 of a columnar frame 11 carrying the swivel drive 5 and the second mixing container part 4.
  • the now lower first mixing container part 2 is lifted off the driving pallet 3 and pressed with the edge of its upper filling end 2a 'against the outer edge 4a' of the open end 4a now pointing downwards from the second mixing container part 4.
  • the first mixing container part 2 is gripped by suitable clamping devices 12 and firmly clamped to the second mixing container section 4, so that a single mixing container with a vertical container axis 9 results.
  • the clamping devices 12 can be designed in a manner known per se, actuated (for example by pressure medium drives) and distributed and attached over the circumference of the second mixing container part 4.
  • the swivel drive 5 serves to swivel the mixing container from the mixing container parts 2 and 4 clamped together from the vertical-axis starting position illustrated in FIGS. 1 and 2 by 180 ° about the horizontal pivot axis 6 into the mixing position illustrated in FIG. 3, in which the second mixing container part 4 then the container bottom and the first mixing container part 2 form a kind of cover for the mixing container. Furthermore, with the help of the swivel drive 5, the mixing container (2, 4) is swiveled back into its vertical-axis starting position after the mixing process.
  • the swivel drive 5 contains a drive motor 13 which is designed in the form of a swivel gear motor and is designed as a brake motor.
  • this drive motor 13 can be switched between two speed ranges that are kept so large that the mixing container (2, 4) swivels back into the stable starting position (FIGS. 1, 2 and 6) with two different, predetermined tilting speeds can work. These two tilting speeds are selected in such a way that when the mixing container swings back with an increased first tilting speed from the mixing position (FIG. 3), it can initially be pivoted beyond the starting position into an intermediate position (FIGS. 4 and 5) in which the mixing container (2 , 4) lingers for about 4-6 seconds, in particular about 5 seconds, and only from this intermediate position (FIG.
  • the mixing container (2, 4) is in its vertical-axis starting position, in which the whole bulk 14 is still in the lower first mixing container part 2.
  • the mixing container (2, 4) is pivoted through 180 ° about the horizontal axis 6 into the mixing position in which the bulk material charge 14 is supported on the second mixing container part 4, which now forms the container base, and thereby by the rotating mixing tools 7 (FIG. 1 ) is mixed thoroughly.
  • the mixing container (2, 4) is then pivoted back from the mixing position shown in FIG. 3 about the horizontal axis 6 with the aid of the swivel drive motor 13 explained above at two different tilting speeds into the starting position by the mixing container (2, 4) according to Arrow 15 by a predetermined angle (angle ⁇ in FIG. 5) beyond the vertical starting position (FIG. 4) into the intermediate position according to FIG. 5 and only from there is pivoted back into the vertical-axis starting position according to FIG. 6 (arrow 15a).
  • a predetermined angle angle ⁇ in FIG. 5
  • the container axis 9 forms with the vertical 16 an angle ⁇ (angular dimension) which should be sufficiently larger than the angle ⁇ which the surface 14a of the bulk material batch 14 forms with the natural slope of the mixed bulk material relative to the vertical, as indicated in Figure 4.
  • the upper portions of the bulk material batch 14 slide into a position due to the natural bulk material in which the surface 14a of the bulk material batch 14 runs essentially parallel to a plane containing the upper filling end 2a 'of the first mixing container part 2, as shown in FIGS. 5 and 6 - after adjustment of the bulk material fill - and in comparison with the as yet unadjusted bulk material fill or surface 14a 'of the bulk material load 14 according to FIG. 4.
  • the angular dimension ⁇ for the intermediate position can be selected in the range between approximately 35 and 55 °, preferably approximately 45 °, in adaptation to the natural slope angle of the respective bulk material.

Description

Die Erfindung betrifft ein Verfahren (entsprechend dem Oberbegriff des Anspruches 1) sowie eine Vorrichtung (gemäß dem Gattungsbegriff des Anspruch 5) zum Mischen von pulverförmigen bis körnigen Schüttgütern.The invention relates to a method (according to the preamble of claim 1) and a device (according to the preamble of claim 5) for mixing powdery to granular bulk materials.

Aus der EP-A-225 495 ist eine Mischvorrichtung mit einem aus zwei Behälterteilen zusammensetzbaren Mischbehälter bekannt, der aus einer vertikalen Ausgangsstellung um eine horizontale Schwenkachse um 180° in seine Mischstellung geschwenkt und nach Beendigung des Mischvorganges wieder um 180° in seine Ausgangsstellung zurückgeschwenkt werden kann. Das Besondere dieser bekannten Mischvorrichtung wird darin gesehen, daß ein antreibbares Mischwerkzeug über seine Nabe mit der Antriebswelle eines Antriebsmotors lösbar zusammengekuppelt werden kann, wobei der erste, transportable Behälterteil auch im Transportzustand den deckelartig angeordneten zweiten Behälterteil mitsamt dem Mischwerkzeug trägt.EP-A-225 495 discloses a mixing device with a mixing container which can be assembled from two container parts and which is pivoted from a vertical starting position about a horizontal pivot axis through 180 ° into its mixing position and, after the mixing process has ended, is pivoted back again through 180 ° into its starting position can. The special feature of this known mixing device is seen in the fact that a drivable mixing tool can be releasably coupled via its hub to the drive shaft of a drive motor, the first, transportable container part also carrying the lid-like second container part together with the mixing tool in the transport state.

Ein Verfahren entsprechend dem Oberbegriff des Anspruches 1 sowie eine Mischvorrichtung gemäß dem Gattungsbegriff des Anspruches 5 sind beispielsweise durch die EP-A-269 799 der Anmelderin bekannt. Der Mischbehälter wird hierbei bei seinem Zurückschwenken nach dem Mischvorgang zunächst um einen vorgegebenen Winkel über die Ausgangsstellung hinaus in eine Zwischenstellung geschwenkt und erst von dort in die vertikalachsige Ausgangsstellung zurückgeschwenkt. Durch diese Maßnahme kann der Füllungsgrad des verfahrbaren ersten Behälterteiles optimal ausgenutzt und gleichzeitig die Durchsatzleistung der Mischvorrichtung wesentlich verbessert werden.A method according to the preamble of claim 1 and a mixing device according to the preamble of claim 5 are known for example from the applicant's EP-A-269 799. When it swivels back after the mixing process, the mixing container is first pivoted through a predetermined angle beyond the starting position into an intermediate position and only then pivoted back from there into the vertical-axis starting position. This measure allows the degree of filling of the movable first container part to be optimally utilized and, at the same time, the throughput the mixing device can be significantly improved.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren entsprechend dem Oberbegriff des Anspruches 1 sowie eine Mischvorrichtung gemäß dem Gattungsbegriff des Anspruches 5 dahin weiterzuentwickeln, daß einerseits die Durchsatzleistung der Mischvorrichtung weiter gesteigert wird, andererseits jedoch der Mischbehälter beim Zurückschwenken aus der Mischstellung die Ausgangsstellung mit großer Präzision erreicht (was für die einwandfreie Funktion der Mischvorrichtung, insbesondere für das Verbinden und Lösen der beiden Mischbehälterteile, von entscheidender Bedeutung ist).The invention has for its object to develop a method according to the preamble of claim 1 and a mixing device according to the preamble of claim 5 so that on the one hand the throughput of the mixing device is further increased, but on the other hand the mixing container when swiveling back from the mixing position, the starting position with a large Precision achieved (which is crucial for the perfect functioning of the mixing device, especially for connecting and disconnecting the two mixing container parts).

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale der Ansprüche 1 bzw. 5 gelöst. Zweckmäßige Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved according to the invention by the characterizing features of claims 1 and 5, respectively. Appropriate embodiments of the invention are the subject of the dependent claims.

Ein Ausführungsbeispiel einer Mischvorrichtung zur Durchführung des erfindungsgemäßen Mischverfahrens sei nachfolgend anhand der Zeichnung näher erläutert. In dieser zum Teil weitgehend schematisch gehaltenen Zeichnung zeigen

  • Fig.1 eine Seitenansicht der Mischvorrichtung;
  • Fig.2 bis 6 ähnliche Frontansichten der Mischvorrichtung entsprechend Pfeil II in Fig.1, bei verschiedenen Betriebsstellungen insbesondere des Mischbehälters vom Beginn bis zum Ende eines kompletten Mischvorganges.
An exemplary embodiment of a mixing device for carrying out the mixing method according to the invention is explained in more detail below with reference to the drawing. Show in this drawing, some of which is largely schematic
  • 1 shows a side view of the mixing device;
  • Fig. 2 to 6 similar front views of the mixing device according to arrow II in Fig.1, in different operating positions, in particular of the mixing container from the beginning to the end of a complete mixing process.

Anhand der Fig.1 und 2 sei zunächst der allgemeine Aufbau dieser erfindungsgemäßen Mischvorrichtung 1 erläutert.The general structure of this mixing device 1 according to the invention will first be explained with reference to FIGS. 1 and 2.

Diese Mischvorrichtung 1 enthält einen ersten Mischbehälterteil 2, der in an sich bekannter Weise einen beispielsweise zylindrischen oberen Behälterabschnitt 2a und einen daran nach unten unmitte!bar anschließenden, trichterförmigen unteren Behälterabschnitt 2b aufweist, wobei das oben offene Ende 2a′ des oberen Behälterabschnittes 2a zum Befüllen dieses ersten Mischbehälterteiles 2 mit Schüttgut - als Einfüllende - dient. Damit dieser erste Mischbehälterteil 2 von einer Beschickungsstelle unterhalb mehrerer Vorratsbehälter bis in den Bereich der eigentlichen Mischvorrichtung 1 befördert werden kann, kann er in jeder geeigneten Weise verfahren werden. Im veranschaulichten Ausführungsbeispiel dient für diese Verfahrbarkeit in an sich bekannter Weise eine Art Transportplattform bzw. Fahrpalette 3, auf der der erste Mischbehälterteil 2 mit dem unteren Auslaufende 2b′ seines unteren Behälterabschnittes 2b abhebbar abgestellt ist.This mixing device 1 contains a first mixing container part 2, which in a manner known per se has, for example, a cylindrical upper container section 2a and a funnel-shaped lower container section 2b adjoining it downwards, the open top end 2a 'of the upper container section 2a for filling this first mixing container part 2 with bulk material - serves as the filling end. So that this first mixing container part 2 can be transported from a loading point below several storage containers into the area of the actual mixing device 1, it can be moved in any suitable manner. Im illustrated Embodiment serves for this movability in a manner known per se, a type of transport platform or pallet 3, on which the first mixing container part 2 with the lower outlet end 2b 'of its lower container section 2b is parked.

Die Mischvorrichtung 1 enthält ferner einen stationär angeordneten zweiten Mischbehälterteil 4, der an einem Schwenkantrieb 5 gehaltert ist und damit um eine horizontale Schwenkachse 6 geschwenkt werden kann, wie später noch im einzelnen erläutert wird. In dem schalenförmig ausgeführten zweiten Mischbehälterteil 4 sind in ebenfalls an sich bekannter Weise Mischwerkzeuge 7 angeordnet, die von einer gesonderten Antriebseinheit 8 um die in der Ausgangsstellung der Mischvorrichtung 1 vertikale Behälterachse 9 rotierend antreibbar sind.The mixing device 1 also contains a stationary second mixing container part 4, which is held on a pivot drive 5 and can thus be pivoted about a horizontal pivot axis 6, as will be explained in detail later. Mixing tools 7 are arranged in the bowl-shaped second mixing container part 4, which are also known per se, and can be driven in rotation by a separate drive unit 8 about the container axis 9 vertical in the starting position of the mixing device 1.

Für den Mischvorgang wird der mit einer Schüttgutcharge gefüllte erste Mischbehälterteil 2 so unter den in der Ausgangsstellung offenen zweiten Mischbehälterteil 4 gefahren, daß die vertikalen Mittelachsen beider Mischbehälterteile 2,4 mit der Behälterachse 9 zusammenfallen, wobei der erste Mischbehälterteil 2 noch auf der Fahrpalette 3 abgestützt ist, die zwecks Ausrichtung des ersten, jetzt unteren Mischbehälterteils 2 gegenüber dem jetzt oberen zweiten Mischbehälterteil 4 in einer Art Gabel 10 eines den Schwenkantrieb 5 und den zweiten Mischbehälterteil 4 tragenden, säulenartigen Gestelles 11 aufgenommen ist. Mittels einer geeigneten Hubeinrichtung wird der jetzt untere erste Mischbehälterteil 2 von der Fahrpalette 3 abgehoben und mit dem Rand seines oberen Einfüllendes 2a′ gegen den äußeren Rand 4a′ des jetzt nach unten weisenden offenen Endes 4a vom zweiten Mischbehälterteil 4 gepreßt. In diesem Zustand wird der erste Mischbehälterteil 2 von geeigneten Spannvorrichtungen 12 ergriffen und fest mit dem zweiten Mischbehälterabschnitt 4 verspannt, so daß sich ein einziger Mischbehälter mit vertikaler Behälterachse 9 ergibt. Die Spannvorrichtungen 12 können in an sich bekannter Weise ausgeführt, betätigt (beispielsweise durch Druckmittelantriebe) und über den Umfang des zweiten Mischbehälterteiles 4 verteilt und angebracht sein.For the mixing process, the first mixing container part 2 filled with a bulk material batch is moved under the second mixing container part 4 which is open in the starting position in such a way that the vertical central axes of both mixing container parts 2, 4 coincide with the container axis 9, the first mixing container part 2 still being supported on the moving pallet 3 which, for the purpose of aligning the first, now lower, mixing container part 2 with respect to the now upper, second mixing container part 4, is received in a kind of fork 10 of a columnar frame 11 carrying the swivel drive 5 and the second mixing container part 4. By means of a suitable lifting device, the now lower first mixing container part 2 is lifted off the driving pallet 3 and pressed with the edge of its upper filling end 2a 'against the outer edge 4a' of the open end 4a now pointing downwards from the second mixing container part 4. In this state, the first mixing container part 2 is gripped by suitable clamping devices 12 and firmly clamped to the second mixing container section 4, so that a single mixing container with a vertical container axis 9 results. The clamping devices 12 can be designed in a manner known per se, actuated (for example by pressure medium drives) and distributed and attached over the circumference of the second mixing container part 4.

Der Schwenkantrieb 5 dient dazu, den Mischbehälter aus den miteinander verspannten Mischbehälterteilen 2 und 4 aus der in den Figuren 1 und 2 veranschaulichten vertikalachsigen Ausgangsstellung um 180° um die horizontale Schwenkachse 6 in die in Figur 3 veranschaulichte Mischstellung zu schwenken, in der der zweite Mischbehälterteil 4 dann den Behälterboden und der erste Mischbehälterteil 2 eine Art Abdeckhaube des Mischbehälters bilden. Ferner wird mit Hilfe des Schwenkantriebes 5 der Mischbehälter (2,4) nach dem Mischvorgang wieder in seine vertikalachsige Ausgangsstellung zurückgeschwenkt.
Der Schwenkantrieb 5 enthält dazu einen Antriebsmotor 13, der in Form eines Schwenkgetriebemotors ausgebildet sowie als Bremsmotor ausgelegt ist. Von Bedeutung ist ferner, daß dieser Antriebsmotor 13 zwischen zwei Drehzahlbereichen umschaltbar ist, die so groß gehalten sind, daß der Mischbehälter (2,4) bei seinem Zurückschwenken in die stabile Ausgangsstellung (Figuren 1,2 und 6) mit zwei unterschiedlichen, vorbestimmten Kippgeschwindigkeiten arbeiten kann. Diese beiden Kippgeschwindigkeiten sind derart gewählt, daß der Mischbehälter bei seinem Zurückschwenken mit einer erhöhten ersten Kippgeschwindigkeit aus der Mischstellung (Figur 3) heraus zunächst über die Ausgangsstellung hinaus in eine Zwischenstellung geschwenkt werden kann (Figuren 4 und 5), in der der Mischbehälter (2,4) etwa 4 - 6 Sekunden, insbesondere etwa 5 Sekunden, verweilt, und erst aus dieser Zwischenstellung (Figur 5) wird der Mischbehälter mit der zweiten Kippgeschwindigkeit (entgegengesetzte Drehrichtung als bei der ersten Kippgeschwindigkeit) entgegengesetzt in die stabile Ausgangsstellung (Figur 6) geschwenkt.
Für ein besonders zuverlässiges Zurückschwenken des Mischbehälters zunächst in die Zwischenstellung und von dort in die stabile Ausgangsstellung können neben der Ausführung des Antriebsmotors 13 als Bremsmotor ferner an sich bekannte Näherungsendschalter 17 sorgen, die an entsprechenden Stellen angeordnet sind und im Sinne einer Drehzahlumschaltung mit dem Antriebsmotor 13 schaltungsverbunden sind (wie in Fig.1 angedeutet).The swivel drive 5 serves to swivel the mixing container from the mixing container parts 2 and 4 clamped together from the vertical-axis starting position illustrated in FIGS. 1 and 2 by 180 ° about the horizontal pivot axis 6 into the mixing position illustrated in FIG. 3, in which the second mixing container part 4 then the container bottom and the first mixing container part 2 form a kind of cover for the mixing container. Furthermore, with the help of the swivel drive 5, the mixing container (2, 4) is swiveled back into its vertical-axis starting position after the mixing process.
For this purpose, the swivel drive 5 contains a drive motor 13 which is designed in the form of a swivel gear motor and is designed as a brake motor. It is also important that this drive motor 13 can be switched between two speed ranges that are kept so large that the mixing container (2, 4) swivels back into the stable starting position (FIGS. 1, 2 and 6) with two different, predetermined tilting speeds can work. These two tilting speeds are selected in such a way that when the mixing container swings back with an increased first tilting speed from the mixing position (FIG. 3), it can initially be pivoted beyond the starting position into an intermediate position (FIGS. 4 and 5) in which the mixing container (2 , 4) lingers for about 4-6 seconds, in particular about 5 seconds, and only from this intermediate position (FIG. 5) is the mixing container at the second tilting speed (opposite direction of rotation) than at the first tilting speed) pivoted in the opposite direction into the stable starting position (FIG. 6).
For a particularly reliable pivoting back of the mixing container first into the intermediate position and from there into the stable starting position, in addition to the design of the drive motor 13 as a brake motor, known proximity limit switches 17 can also be provided, which are arranged at corresponding points and in the sense of a speed changeover with the drive motor 13 are connected to the circuit (as indicated in Fig. 1).

Aus den vorstehenden Erläuterungen über Aufbau und Funktion der Mischvorrichtung 1 läßt sich ohne weiteres auch die Durchführung des weiter oben beschriebenen Mischverfahrens mit Hilfe dieser Mischvorrichtung 1 erkennen. Es genügt daher, lediglich die einzelnen Betriebsstellungen zwischen Beginn und Ende eines vollständigen Mischvorganges entsprechend den Darstellungen in den Figuren 2 - 6 zu erläutern.
In Figur 2 befindet sich der Mischbehälter (2, 4) in seiner vertikalachsigen Ausganggsstellung, in der die ganze Schüttgutcharge 14 sich noch im unteren ersten Mischbehälterteil 2 befindet.
Gemäß Figur 3 ist der Mischbehälter (2, 4) um 180° um die horizontale Achse 6 in die Mischstellung geschwenkt, in der die Schüttgutcharge 14 auf dem nun den Behälterboden bildenden zweiten Mischbehälterteil 4 abgestützt ist und dabei durch die rotierenden Mischwerkzeuge 7 (Figur 1) intensiv durchgemischt wird.
Nach diesem Mischvorgang wird der Mischbehälter (2, 4) dann aus der in Figur 3 gezeigten Mischstellung um die horizontale Achse 6 mit Hilfe des weiter oben erläuterten Schwenkantriebsmotors 13 mit zwei unterschiedlichen Kippgeschwindigkeiten in die Ausgangsstellung zurückgeschwenkt, indem der Mischbehälter (2, 4) gemäß Pfeil 15 um ein vorgegebenes Winkelmaß (Winkel α in Figur 5) über die vertikale Ausgangsstellung (Figur 4) hinaus in die Zwischenstellung gemäß Figur 5 und erst von dort in die vertikalachsige Ausgangsstellung gemäß Fig.6 zurückgeschwenkt (Pfeil 15a) wird. In der Zwischenstellung gemäß Fig.5 bildet die Behälterachse 9 mit der Vertikalen 16 einen Winkel α (Winkelmaß), der ausreichend größer sein soll als der Winkel β , den die Oberfläche 14a der Schüttgutcharge 14 bei natürlicher Böschung des gemischten Schüttgutes gegenüber der Vertikalen bildet, wie es in Figur 4 angedeutet ist. Beim Verweilen in der Zwischenstellung gemäß Figur 5 rutschen dann die oberen Anteile der Schüttgutcharge 14 aufgrund der natürlichen Schüttung in eine Lage, in der die Oberfläche 14a der Schüttgutcharge 14 im wesentlichen parallel zu einer das obere Einfüllende 2a′ des ersten Mischbehälterteiles 2 enthaltenen Ebene verläuft, wie es in den Figuren 5 und 6 - nach Abgleichen der Schüttgutschüttung - und im Vergleich mit der noch nicht abgeglichenen Schüttgutschüttung bzw. Oberfläche 14a′ der Schüttgutcharge 14 gemäß Figur 4 ersichtlich ist.From the above explanations about the structure and function of the mixing device 1, the implementation of the mixing method described above with the aid of this mixing device 1 can also be readily recognized. It is therefore sufficient to explain only the individual operating positions between the start and end of a complete mixing process in accordance with the representations in FIGS. 2-6.
In Figure 2, the mixing container (2, 4) is in its vertical-axis starting position, in which the whole bulk 14 is still in the lower first mixing container part 2.
According to FIG. 3, the mixing container (2, 4) is pivoted through 180 ° about the horizontal axis 6 into the mixing position in which the bulk material charge 14 is supported on the second mixing container part 4, which now forms the container base, and thereby by the rotating mixing tools 7 (FIG. 1 ) is mixed thoroughly.
After this mixing process, the mixing container (2, 4) is then pivoted back from the mixing position shown in FIG. 3 about the horizontal axis 6 with the aid of the swivel drive motor 13 explained above at two different tilting speeds into the starting position by the mixing container (2, 4) according to Arrow 15 by a predetermined angle (angle α in FIG. 5) beyond the vertical starting position (FIG. 4) into the intermediate position according to FIG. 5 and only from there is pivoted back into the vertical-axis starting position according to FIG. 6 (arrow 15a). In the intermediate position according to FIG. 5, the container axis 9 forms with the vertical 16 an angle α (angular dimension) which should be sufficiently larger than the angle β which the surface 14a of the bulk material batch 14 forms with the natural slope of the mixed bulk material relative to the vertical, as indicated in Figure 4. When staying in the intermediate position according to FIG. 5, the upper portions of the bulk material batch 14 then slide into a position due to the natural bulk material in which the surface 14a of the bulk material batch 14 runs essentially parallel to a plane containing the upper filling end 2a 'of the first mixing container part 2, as shown in FIGS. 5 and 6 - after adjustment of the bulk material fill - and in comparison with the as yet unadjusted bulk material fill or surface 14a 'of the bulk material load 14 according to FIG. 4.

Das Winkelmaß α für die Zwischenstellung kann im Bereich zwischen etwa 35 und 55°, vorzugsweise etwa bei 45° gewählt werden, in Anpassung an den natürlichen Böschungswinkel des jeweiligen Schüttgutes.The angular dimension α for the intermediate position can be selected in the range between approximately 35 and 55 °, preferably approximately 45 °, in adaptation to the natural slope angle of the respective bulk material.

Claims (7)

1. Method of mixing bulk materials in powdered to granular form, in which
a) a bulk material charge (14) which is to be mixed is put into a transportable first mixing vessel part (2) and moved under a stationary second mixing vessel part (4) in which mixing tools (7) which can be driven in rotation are arranged,
b) the two mixing vessel parts (2, 4) are clamped together in a starting position with a common vertical vessel axis (9) to form one single mixing vessel, and this mixing vessel is then pivoted by approximately 180° into its mixing position in which the bulk material charge (14) is intensively intermixed with the aid of the mixing tools (7),
c) after this mixing operation the mixing vessel is then pivoted back into the starting position with a vertical axis, and when the mixing vessel is pivoted back it is first of all pivoted by a predetermined angle (α) over the starting position into an intermediate position and only pivoted back into the starting position from there, this angle (α) being greater than the angle (β) which the surface of the bulk material charge with the natural slope of the particular bulk material forms with the vertical,
d) after which the two mixing vessel parts (2, 4) are again separated from one another and the first mixing vessel part (2) with the mixed bulk material charge (14) in it is transported to a consuming point,
characterised in that
e) when the mixing vessel is pivoted back out of the mixing position into the intermediate position it is initially pivoted at a first, higher tilting speed and then pivoted back out of this intermediate position into the starting position at a second, lower tilting speed.
2. Method as claimed in claim 1, characterised in that the mixing vessel rests in the intermediate position until the upper quantities of the bulk material charge in the upper section of the first mixing vessel part have slid into a position in which the surface of this bulk material charge is substantially parallel to a plane containing the end of the first mixing vessel part which is open at the top.
3. Method as claimed in claim 2, characterised in that the mixing vessel rests in the intermediate position for approximately 2 to 8 seconds, preferably approximately 4 to 6 seconds.
4. Method as claimed in claim 1, characterised in that the angle (α) between the intermediate position and starting position of the mixing vessel is between 35 and 55°, preferably approximately 45°.
5. Mixing apparatus for mixing bulk materials in powdered to granular form, containing
a) a transportable first mixing vessel part (2) with a filling end (2a) which is open at the top,
b) a second mixing vessel part (4) which is arranged stationary and retained so as to be pivotable about a horizontal axis (6), has mixing tools (7) which are driven in rotation and can be clamped to the first mixing vessel part (2) in a starting position with a common vertical vessel axis (9) to form one single mixing vessel,
c) a pivot drive (5) by means of which the mixing vessel can be pivoted out of the starting position about the horizontal pivot axis (6) by approximately 180° into a mixing position in which the second mixing vessel part (4) forms the vessel base and the first mixing vessel part (2) forms a cover dome,
characterised in that
d) the pivot drive (5) is constructed so that it can be switched between two tilting speeds for pivoting the mixing vessel (2, 4) back into the starting position, and the mixing vessel can first of all be pivoted at a first, higher tilting speed over the starting position into an intermediate position and from there can pivoted in the opposite direction at a second, lower tilting speed into the starting position.
6. Apparatus as claimed in claim 5, characterised in that the pivot drive (5) has a drive motor (13) which can be switched between two speed values adapted to the two tilting speeds and is constructed as a brake motor.
7. Apparatus as claimed in claim 6, characterised in that approach end switches (17) are provided for the intermediate position and for the starting position of the mixing vessel (2, 4) and are intended for switching the drive motor (13) over.
EP89116940A 1988-10-24 1989-09-13 Process and device for mixing powdered to granulated bulk materials Expired - Lifetime EP0365814B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3836216 1988-10-24
DE3836216A DE3836216A1 (en) 1988-10-24 1988-10-24 METHOD AND DEVICE FOR MIXING POWDER-SHAPED TO GRAINED BULK GOODS

Publications (2)

Publication Number Publication Date
EP0365814A1 EP0365814A1 (en) 1990-05-02
EP0365814B1 true EP0365814B1 (en) 1992-03-04

Family

ID=6365816

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89116940A Expired - Lifetime EP0365814B1 (en) 1988-10-24 1989-09-13 Process and device for mixing powdered to granulated bulk materials

Country Status (4)

Country Link
US (1) US4957373A (en)
EP (1) EP0365814B1 (en)
DE (2) DE3836216A1 (en)
ES (1) ES2029547T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4235498A1 (en) * 1992-10-21 1994-04-28 Herfeld Gmbh & Co Kg Dr Slidable boss mixing impeller - has improved cleaning access for bottom or side wall entry drive shafts in batch mixers

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4104399C2 (en) * 1991-02-14 1995-06-29 Ruberg Mischtechnik Kg mixer
DE4335285A1 (en) * 1993-10-15 1995-04-20 Herfeld Gmbh & Co Kg Dr Mixing device
US5549384A (en) * 1995-05-15 1996-08-27 Reynolds; Augustus T. Mixer with helically extending blades
US5516207A (en) * 1995-09-22 1996-05-14 Haicht; Helmuet Method for blending dry flowable materials
WO1997025911A1 (en) * 1996-01-18 1997-07-24 Schindlegger Walter Jun Stirring device
DE29600833U1 (en) * 1996-01-18 1996-05-30 Schindlegger Jun Stirring device
US5847294A (en) * 1996-04-09 1998-12-08 Amherst Process Instruments, Inc. Apparatus for determining powder flowability
US5865538A (en) * 1997-05-05 1999-02-02 Readco Manufacturing, Inc. Containerized batch mixer
US6765082B2 (en) * 1998-12-22 2004-07-20 Bayer Aktiengesellschaft Method for producing highly-branched glycidol-based polyols
PT1265694E (en) * 2000-02-17 2004-10-29 Astrazeneca Uk Ltd APPARATUS AND METHOD OF MIXTURE
US6595680B2 (en) * 2000-02-24 2003-07-22 Kubota Corporation Food mixing apparatus
US6331070B1 (en) * 2000-10-30 2001-12-18 Reliance Industries, Inc. Process and apparatus for particle size reduction and homogeneous blending of ingredients in a fluidized change can mixer
DE10103260A1 (en) * 2001-01-25 2002-08-22 Thyssen Henschel Industrietech Pressure relief system for mixer containers, in particular cylindrical container mixers for powder, semolina and / or granular materials
US6802641B2 (en) * 2002-12-19 2004-10-12 Spraylat Corporation, Inc. Invertible mixing system with angled blade assembly and method for mixing powders with such system
US7325969B2 (en) * 2004-07-08 2008-02-05 Glatt Systemtechnik Gmbh Container mixer
DE202009011685U1 (en) * 2009-08-28 2009-12-03 Schleinzer, Werner Device for processing food
JP5484849B2 (en) * 2009-09-30 2014-05-07 シスメックス株式会社 Blood sample processing apparatus and blood sample processing method
PL2465780T3 (en) * 2010-12-16 2013-10-31 Inversiones Hiki6 S L Mobile dosing, mixing and packaging plant
US10624499B2 (en) 2014-07-30 2020-04-21 North American Robotics Corporation Systems and methods for pressure control in automated blending devices
US9629503B2 (en) * 2014-07-30 2017-04-25 North American Robotics Corporation Blending container for use with blending apparatus
WO2016018750A1 (en) * 2014-07-30 2016-02-04 North American Robotics Corporation Automated food processing system and method
US9789453B2 (en) 2015-11-11 2017-10-17 Tomzi International Ltd Pivoting blender
CN106422909A (en) * 2016-10-14 2017-02-22 王爵崇 Lifting transmission device of barrel-changeable mixing machine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174728A (en) * 1963-02-28 1965-03-23 Patterson Ind Inc Blending apparatus
US3224741A (en) * 1964-07-01 1965-12-21 Sr John L Muench Mixer
DE2110047C2 (en) * 1971-03-03 1983-01-20 Herfeld, Dipl.-Volksw. Dr., Friedrich Walter Adolf, 5982 Neuenrade Mixing device
DE3123362A1 (en) * 1981-06-12 1982-12-30 Herfeld, Friedrich Walter, Dr., 5982 Neuenrade MIXING DEVICE
DE3426159A1 (en) * 1984-07-16 1986-01-23 Herfeld, Friedrich Walter, Dr., 5982 Neuenrade MIXING DEVICE
DE3433674A1 (en) * 1984-09-13 1986-03-20 Friedrich Walter Dr. 5982 Neuenrade Herfeld MIXING DEVICE
DE3433693A1 (en) * 1984-09-13 1986-03-20 Herfeld, Friedrich Walter, Dr., 5982 Neuenrade Mixing device
DE3543913A1 (en) * 1985-12-12 1987-06-19 Herfeld Friedrich W MIXING DEVICE
DE3637607A1 (en) * 1986-11-05 1988-05-11 Herfeld Ute MIXING DEVICE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4235498A1 (en) * 1992-10-21 1994-04-28 Herfeld Gmbh & Co Kg Dr Slidable boss mixing impeller - has improved cleaning access for bottom or side wall entry drive shafts in batch mixers

Also Published As

Publication number Publication date
US4957373A (en) 1990-09-18
EP0365814A1 (en) 1990-05-02
DE3836216A1 (en) 1990-04-26
ES2029547T3 (en) 1992-08-16
DE58900920D1 (en) 1992-04-09

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