EP0176718A2 - Mixer - Google Patents

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Publication number
EP0176718A2
EP0176718A2 EP85110220A EP85110220A EP0176718A2 EP 0176718 A2 EP0176718 A2 EP 0176718A2 EP 85110220 A EP85110220 A EP 85110220A EP 85110220 A EP85110220 A EP 85110220A EP 0176718 A2 EP0176718 A2 EP 0176718A2
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EP
European Patent Office
Prior art keywords
container
mixing
drive motor
agitator
container part
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EP85110220A
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German (de)
French (fr)
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EP0176718A3 (en
Inventor
Friedrich Walter Dr. Herfeld
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Individual
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Individual
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Publication of EP0176718A2 publication Critical patent/EP0176718A2/en
Publication of EP0176718A3 publication Critical patent/EP0176718A3/en
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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
    • 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
    • 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
    • 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

  • the invention relates to a mixing device according to the preamble of claim 1.
  • a mixing device of the type required in the preamble of claim 1 is known from DE-PS 21 10 047. Since in this mixing device the agitator is located in the second container part pivotably mounted on the fixed holder, the transportable first container part can be brought underneath the second container part and connected to it without any significant vertical relative movement. By eliminating a larger vertical relative movement between the first container part, which is designed to be transportable, and the second container part, which contains the agitator, not only does the outlay in terms of equipment decrease, but also the handling of the mixing device is simplified.
  • the drive motor for the agitator is arranged in the axial extension of the agitator on the outside of the second container part.
  • the drive motor is therefore pivoted together with the second container part during the transition from the starting position to the mixing position (and vice versa).
  • the invention has for its object to develop a mixing device of the type required in the preamble of claim 1 that the construction is simplified.
  • the fixed arrangement of the drive motor for the agitator is particularly favorable for large drive outputs.
  • the stationary drive motor does not have to follow the pivoting movement of the mixing container, which reduces the torque required for the pivoting movement and permits a lighter design of the pivot bearing.
  • the stationary arrangement of the drive motor in the stand of the mixing device also results in a very desirable lower position of the center of gravity. It is also advantageous that the horizontal axis, about which the mixing container can be pivoted, can be placed lower, for example halfway up the height of the mixing container, because of the pivotability of the second part of the container, only the axial length of the agitator (but not additionally the axial length of the drive motor) must be taken into account.
  • the fixed arrangement of the drive motor also makes it possible to arrange a reduction gear between the drive motor and the bevel gear and between the bevel gear and the agitator. As a result, the speed of the agitator can be optimally adapted to mixed operation, which is not possible with a direct drive with a fixed speed.
  • the mixing device shown in the drawing contains a mixing container 1, which consists of two interconnectable bowl-shaped container parts 2 and 3, of which the first container part 2 is designed to be transportable and is provided with a bottom outlet 2 a in the illustrated embodiment.
  • the second container 3 is on a stationary support tion 4 stored such that it is pivotable by 180 ° about a horizontal axis 5.
  • a starting position which is shown in the left half section in FIG. 1, the second container part 3 forms the lid of the mixing container 1.
  • the second container part 3 In a mixing position rotated by 180 ° with respect to this starting position, the second container part 3 forms the bottom of the mixing container 1.
  • An agitator 6 is arranged in the second container part 3 and is driven by a stationary drive motor 7.
  • the drive connection between the drive motor 7 and the agitator 6 contains a reduction gear 8, an angular gear 9 and a further reduction gear 10.
  • the housing 9a of the angular gear 9 can be pivoted together with the second container part 3 about the axis 5.
  • the input shaft 11 of the angular gear 9 is arranged coaxially to the axis 5, about which the second container part 3 can be pivoted.
  • the output shaft 12 of the angular gear 9 is parallel to the agitator shaft 13.
  • the pivoting movement of the mixing container 1 about the horizontal axis 5 is carried out by a drive motor 14 via a reduction gear 15.
  • the bearing provided on the holder 4 for the pivoting movement of the mixing container 1 is designated by 16.
  • the reduction gears 8, 10 and 15 are designed, for example, as belt or chain drives.
  • the pulleys or sprockets of these three reduction gears are designated 8a, 8b, 10a, 10b and 15a, 15b.
  • the two container parts 2 and 3 of the mixing container 1 are connected to one another via a tensioning device 17. 1 shows in the left half section the two container parts 2 and 3 in the interconnected state, while the right half section illustrates the container part 2 in the lowered state (resting on a transport carriage 18).
  • the transportable container part 3 is moved under the container part 2 pivotably mounted on the holder 4, slightly raised by a lifting device and connected to the container part 3.
  • the mixing container 1 is pivoted by the drive motor 14 through 180 ° into the mixing position, so that the container part 3 with the agitator 6 forms the bottom of the mixing container.
  • the drive motor 7 is switched on and the mixing process is carried out.
  • the mixing container 1 is then pivoted back again by 180 ° into the starting position, and the container part 2 with the finished mixture is removed.
  • the mixing device according to the invention can also be used as a free-fall mixer if necessary.
  • the mixing container 1 by the Drive motor 14 continuously pivoted in the constant direction of rotation by more than 360 ° about the horizontal axis 5.
  • the drive motor 7 for the agitator 6 can stand still or rotate freely.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)

Abstract

Die Erfindung betrifft eine Mischvorrichtung mit einem um 180° um eine horizontale Achse schwenkbaren Mischbehälter, dessen Rührwerks-Antriebsmotor ortsfest angeordnet ist. Eine derartige Mischvorrichtung zeichnet sich durch eine einfache Bauweise aus. Durch Untersetzungsgetriebe zwischen dem ortsfesten Antriebsmotor und dem Rührwerkswelle dem Mischvorgang optimal angepaßt werden.The invention relates to a mixing device with a mixing container pivotable through 180 ° about a horizontal axis, the agitator drive motor of which is arranged in a stationary manner. Such a mixing device is characterized by a simple construction. Through the reduction gear between the stationary drive motor and the agitator shaft, the mixing process can be optimally adapted.

Description

Die Erfindung betrifft eine Mischvorrichtung entsprechend dem Oberbegriff des Anspruches 1.The invention relates to a mixing device according to the preamble of claim 1.

Eine Mischvorrichtung der im Oberbegriff des Anspruches 1 vorausgesetzten Art ist durch die DE-PS 21 10 047 bekannt. Da sich bei dieser Mischvorrichtung das Rührwerk in dem an der ortsfesten Halterung schwenkbar gelagerten zweiten Behälterteil befindet, kann der transportabel ausgebildete erste Behälterteil ohne nennenswerte vertikale Relativbewegung unter den zweiten Behälterteil gebracht und mit diesem verbunden werden. Durch den Wegfall einer größeren vertikalen Relativbewegung zwischen dem transportabel ausgebildeten ersten Behälterteil und dem das Rührwerk enthaltenden zweiten Behälterteil verringert sich nicht nur der anlagentechnische Aufwand, sondern es vereinfacht sich auch die Handhabung der Mischvorrichtung.A mixing device of the type required in the preamble of claim 1 is known from DE-PS 21 10 047. Since in this mixing device the agitator is located in the second container part pivotably mounted on the fixed holder, the transportable first container part can be brought underneath the second container part and connected to it without any significant vertical relative movement. By eliminating a larger vertical relative movement between the first container part, which is designed to be transportable, and the second container part, which contains the agitator, not only does the outlay in terms of equipment decrease, but also the handling of the mixing device is simplified.

Indem der Mischbehälter und das Rührwerk dann aus der Ausgangsstellung um 180° in eine Mischstellung geschwenkt werden, in der der zweite Behälterteil den Boden des Mischbehälters bildet, wird erreicht, daß das Rührwerk sich nunmehr dicht am Boden des Mischbehälters befindet. Dadurch wird auch bei schwierig zu mischendem Gut eine vollständige Durchmischung gewährleistet.By then pivoting the mixing container and the agitator from the initial position through 180 ° into a mixing position in which the second container part forms the bottom of the mixing container, it is achieved that the agitator is now located close to the bottom of the mixing container. This ensures complete mixing even when the material is difficult to mix.

Bei der Mischvorrichtung gemäß DE-PS 21 10 047 ist der Antriebsmotor für das Rührwerk in axialer Verlängerung des Rührwerks auf der Außenseite des zweiten Behälterteiles angeordnet. Der Antriebsmotor wird daher zusammen mit dem zweiten Behälterteil beim Übergang von der Ausgangsstellung in die Mischstellung (und umgekehrt) geschwenkt.In the mixing device according to DE-PS 21 10 047 the drive motor for the agitator is arranged in the axial extension of the agitator on the outside of the second container part. The drive motor is therefore pivoted together with the second container part during the transition from the starting position to the mixing position (and vice versa).

Der Erfindung liegt die Aufgabe zugrunde, eine Mischvorrichtung der im Oberbegriff des Anspruches 1 vorausgesetzten Art dahin zu entwickeln, daß die Bauweise vereinfacht wird.The invention has for its object to develop a mixing device of the type required in the preamble of claim 1 that the construction is simplified.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches 1 gelöst.This object is achieved by the characterizing features of claim 1.

Die ortsfeste Ahordung des Antriebsmotors für das Rührwerk ist vor allem bei großen Antriebsleistungen günstig. Der ortsfest angeordnete Antriebsmotor braucht die Schwenkbewegung des Mischbehälters nicht mitzuvollziehen, was das für die Schwenkbewegung erforderliche Drehmoment verringert und eine leichtere Bauweise der Schwenklagerung gestattet.The fixed arrangement of the drive motor for the agitator is particularly favorable for large drive outputs. The stationary drive motor does not have to follow the pivoting movement of the mixing container, which reduces the torque required for the pivoting movement and permits a lighter design of the pivot bearing.

Durch die ortsfeste Anordnung des Antriebsmotors im Ständer der Mischvorrichtung ergibt sich ferner eine sehr erwünschte tiefere Lage des Schwerpunktes. Vorteilhaft ist weiterhin, daß die horizontale Achse, um die der Mischbehälter schwenkbar ist, niedriger - etwa auf halbe Höhe des Mischbehälters - gelegt werden kann, da für die Schwenkbeweglichkeit des zweiten Behälterteiles lediglich die axiale Baulänge des Rührwerkes (nicht jedoch zusätzlich die axiale Baulänge des Antriebsmotors) berücksichtigt werden muß.The stationary arrangement of the drive motor in the stand of the mixing device also results in a very desirable lower position of the center of gravity. It is also advantageous that the horizontal axis, about which the mixing container can be pivoted, can be placed lower, for example halfway up the height of the mixing container, because of the pivotability of the second part of the container, only the axial length of the agitator (but not additionally the axial length of the drive motor) must be taken into account.

Die ortsfeste Anordnung des Antriebsmotors ermöglicht es ferner, zwischen dem Antriebsmotor und dem Winkelgetriebe sowie zwischen dem Winkelgetriebe und dem Rührwerk je ein Untersetzungsgetriebe anzuordnen. Dadurch kann die Drehzahl des Rührwerkes dem Mischbetrieb optimal angepaßt werden, was bei einem direkten Antrieb mit fester Drehzahl nicht möglich ist.The fixed arrangement of the drive motor also makes it possible to arrange a reduction gear between the drive motor and the bevel gear and between the bevel gear and the agitator. As a result, the speed of the agitator can be optimally adapted to mixed operation, which is not possible with a direct drive with a fixed speed.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung veranschaulicht. Es zeigen

  • Fig. 1 eine Seitenansicht der erfindungsgemäßen Mischvorrichtung
  • Fig. 2 eine Aufsicht auf die Mischvorrichtung
An embodiment of the invention is illustrated in the drawing. Show it
  • Fig. 1 is a side view of the mixing device according to the invention
  • Fig. 2 is a plan view of the mixing device

Die in der Zeichnung dargestellte Mischvorrichtung enthält einen Mischbehälter 1,der aus zwei mit einander verbindbaren schalenförmigen Behälterteilen 2 und 3 besteht, von denen der erste Behälterteil 2 transportabel ausgebildet und bei dem dargestellten Ausführungsbeispiel mit einem Bodenauslauf 2 a versehen ist.The mixing device shown in the drawing contains a mixing container 1, which consists of two interconnectable bowl-shaped container parts 2 and 3, of which the first container part 2 is designed to be transportable and is provided with a bottom outlet 2 a in the illustrated embodiment.

Der zweite Behälter 3 ist an einer ortsfesten Halterung 4 derart gelagert, daß er um 180° um eine horizontale Achse 5 schwenkbar ist. In einer Ausgangsstellung, die in Fig. 1 im linken Halbschnitt dargestellt ist, bildet der zweite Behälterteil 3 den Deckel des Mischbehälters 1. In einer gegenüber dieser Ausgangsstellung um 180° gedrehten Mischstellung bildet der zweite Behälterteil 3 den Boden des Mischbehälters 1.The second container 3 is on a stationary support tion 4 stored such that it is pivotable by 180 ° about a horizontal axis 5. In a starting position, which is shown in the left half section in FIG. 1, the second container part 3 forms the lid of the mixing container 1. In a mixing position rotated by 180 ° with respect to this starting position, the second container part 3 forms the bottom of the mixing container 1.

Im zweiten Behälterteil 3 ist ein Rührwerk 6 angeordnet, das von einem ortsfest angeordneten Antriebsmotor 7 angetrieben wird.An agitator 6 is arranged in the second container part 3 and is driven by a stationary drive motor 7.

Die Antriebsverbindung zwischen dem Antriebsmotor 7 und dem Rührwerk 6 enthält ein Untersetzungsgetriebe 8, ein Winkelgetriebe 9 und ein weiteres Untersetzungsgetriebe 10. Das Gehäuse 9a des Winkelgetriebes 9 ist gemeinsam mit dem zweiten Behälterteil3 um die Achse 5 schwenkbar. Die Eingangswelle 11 des Winkelgetriebes 9 ist koaxial zu der Achse 5 angeordnet, um der zweite Behälterteil 3 schwenkbar ist. Die Ausgangswelle 12 des Winkelgetriebes 9 liegt parallel zur Rührwerkswelle 13.The drive connection between the drive motor 7 and the agitator 6 contains a reduction gear 8, an angular gear 9 and a further reduction gear 10. The housing 9a of the angular gear 9 can be pivoted together with the second container part 3 about the axis 5. The input shaft 11 of the angular gear 9 is arranged coaxially to the axis 5, about which the second container part 3 can be pivoted. The output shaft 12 of the angular gear 9 is parallel to the agitator shaft 13.

Die Schwenkbewegung des Mischbehälters 1 um die horizontale Achse 5 erfolgt durch einen Antriebsmotor 14 über ein Untersetzungsgetriebe 15. Das an der Halterung 4 vorgesehene Lager für die Schwenkbewegung des Mischbehälters 1 ist mit 16 bezeichnet.The pivoting movement of the mixing container 1 about the horizontal axis 5 is carried out by a drive motor 14 via a reduction gear 15. The bearing provided on the holder 4 for the pivoting movement of the mixing container 1 is designated by 16.

Die Untersetzungsgetriebe 8, 10 und 15 sind beispielsweise als Riemen- oder Kettentriebe ausgebildet. Die Riemenscheiben bzw. Kettenräder dieser drei Untersetzungsgetriebe sind mit 8a, 8b, 10a, 10b und 15a, 15b bezeichnet. Die beiden Behälterteile 2 und 3 des Mischbehälters 1 werden über eine Spannvorrichtung 17 miteinander verbunden. Dabei zeigt Fig. 1 im linken Halbschnitt die beiden Behälterteile 2 und 3 im miteinander verbundenen Zustand, während der rechte Halbschnitt den Behälterteil 2 im abgesenkten Zustand (ruhend auf einem Transportwagen 18) veranschaulicht.The reduction gears 8, 10 and 15 are designed, for example, as belt or chain drives. The pulleys or sprockets of these three reduction gears are designated 8a, 8b, 10a, 10b and 15a, 15b. The two container parts 2 and 3 of the mixing container 1 are connected to one another via a tensioning device 17. 1 shows in the left half section the two container parts 2 and 3 in the interconnected state, while the right half section illustrates the container part 2 in the lowered state (resting on a transport carriage 18).

Im Betrieb wird der transportabel ausgebildete Behälterteil 3 unter den an der Halterung 4 schwenkbar gelagerten Behälterteil 2 gefahren, durch eine Hubvorrichtung leicht angehoben und mit dem Behälterteil 3 verbunden. Dann wird der Mischbehälter 1 durch den Antriebsmotor 14 um 180° in die Mischstellung verschwenkt, so daß der Behälterteil 3 mit dem Rührwerk 6 den Boden des Mischbehälters bildet. Nun wird der Antriebsmotor 7 eingeschaltet und der Mischvorgang durchgeführt. Anschließend wird der Mischbehälter 1 wieder um 180° in die Ausgangsstellung zurückgeschwenkt,und der Behälterteil 2 mit dem fertigen Mischgut entfernt.In operation, the transportable container part 3 is moved under the container part 2 pivotably mounted on the holder 4, slightly raised by a lifting device and connected to the container part 3. Then the mixing container 1 is pivoted by the drive motor 14 through 180 ° into the mixing position, so that the container part 3 with the agitator 6 forms the bottom of the mixing container. Now the drive motor 7 is switched on and the mixing process is carried out. The mixing container 1 is then pivoted back again by 180 ° into the starting position, and the container part 2 with the finished mixture is removed.

Abweichend von der vorstehend geschilderten Betriebsweise kann die erfindungsgemäße Mischvorrichtung im Bedarfsfalle auch als Freifallmischer eingesetzt werden. Hierbei wird der Mischbehälter 1 durch den Antriebsmotor 14 kontinuierlich im gleichbleibenden Drehsinn um mehr als 360° um die horizontale Achse 5 geschwenkt. Der Antriebsmotor 7 für das Rührwerk 6 kann hierbei stillstehen bzw. lose mitdrehen.Deviating from the above-described operating mode, the mixing device according to the invention can also be used as a free-fall mixer if necessary. Here, the mixing container 1 by the Drive motor 14 continuously pivoted in the constant direction of rotation by more than 360 ° about the horizontal axis 5. The drive motor 7 for the agitator 6 can stand still or rotate freely.

Claims (5)

1. Mischvorrichtung, enthaltend a) einen Mischbehälter (1), der aus zwei miteinander verbindbaren schalenförmigen Behälterteilen (2, 3) besteht, von denen der erste Behälterteil (2) transportabel ausgebildet ist, b) eine ortsfeste Halterung (4), an der der zweite Behälterteil (3) derart gelagert ist, daß er um 180° um eine horizontale Achse (5) zwischen einer Ausgangsstellung, in der der zweite Behälterteil (3) den Deckel des Mischbehälters (1) bildet, und einer Mischstellung, in der der zweite Behälterteil (3) den Boden des Mischbehälters (1) bildet, schwenkbar ist, c) ein im zweiten Behälterteil (3) angeordnetes, mit einem Antriebsmotor (7) verbundenes Rührwerk (6), dessen Welle (13) in der Mischstellung vertikal steht,
gekennzeichnet durch folgende Merkmale: d) Der Antriebsmotor (7) ist ortsfest angeordnet; e) in der Antriebsverbindung zwischen dem Antriebsmotor (7) und dem Rührwerk (6) ist ein Winkelgetriebe (9) angeordnet, dessen Gehäuse (9a) gemeinsam mit dem zweiten Behälterteil (3) schwenkbar ist, dessen Eingangswelle (11) koaxial zu der Achse (5) angeordnet ist, um die der zweite Behälterteil (3) schwenkbar ist, und dessen Ausgangswelle (12) parallel zur Rührwerkswelle (13) liegt. 1. Mixing device containing a) a mixing container (1) which consists of two interconnectable bowl-shaped container parts (2, 3), of which the first container part (2) is designed to be transportable, b) a stationary holder (4) on which the second container part (3) is mounted in such a way that it rotates 180 ° about a horizontal axis ( 5 ) between an initial position in which the second container part (3) covers the lid of the mixing container ( 1) and a mixing position in which the second container part (3) forms the bottom of the mixing container (1) can be pivoted, c) an agitator (6) arranged in the second container part (3) and connected to a drive motor (7), the shaft (13) of which is vertical in the mixed position,
characterized by the following features: d) The drive motor (7) is arranged stationary; e) in the drive connection between the drive motor (7) and the agitator (6), an angular gear (9) is arranged, the housing (9a) can be pivoted together with the second container part (3), the input shaft (11) ko is arranged axially to the axis (5) about which the second container part (3) can be pivoted, and the output shaft (12) of which lies parallel to the agitator shaft (13). 2. Mischvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß zwischen dem Antriebsmotor (7) und dem Winkelgetriebe (9) ein Untersetzungsgetriebe (8) angeordnet ist.2. Mixing device according to claim 1, characterized in that a reduction gear (8) is arranged between the drive motor (7) and the angular gear (9). 3. Mischvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß zwischen dem Winkelgetriebe (9) und dem Rührwerk (6) ein Untersetzungsgetriebe (10) angeordnet ist.3. Mixing device according to claim 1, characterized in that a reduction gear (10) is arranged between the angular gear (9) and the agitator (6). 4. Mischvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Winkelgetriebe (9) als Untersetzungsgetriebe ausgebildet ist.4. Mixing device according to claim 1, characterized in that the angular gear (9) is designed as a reduction gear. 5. Mischvorrichtung nach Anspruch 1, enthaltend einen weiteren Antriebsmotor (14) für die Schwenkbewegung des Mischbehälters (1) um die horizontale Achse (5), dadurch gekennzeichnet daß der Mischbehälter (1) durch den weiteren Antriebsmotor (14) kontinuierlich im gleichbleibenden Drehsinn ummehr als 360° um die horizontale Achse (5) drehbar ist.5. Mixing device according to claim 1, comprising a further drive motor (14) for the pivoting movement of the mixing container (1) about the horizontal axis (5), characterized in that the mixing container (1) by the further drive motor (14) continuously in the same direction of rotation is rotatable as 360 ° around the horizontal axis (5).
EP85110220A 1984-09-13 1985-08-14 Mixer Withdrawn EP0176718A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3433674 1984-09-13
DE19843433674 DE3433674A1 (en) 1984-09-13 1984-09-13 MIXING DEVICE

Publications (2)

Publication Number Publication Date
EP0176718A2 true EP0176718A2 (en) 1986-04-09
EP0176718A3 EP0176718A3 (en) 1987-01-21

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EP85110220A Withdrawn EP0176718A3 (en) 1984-09-13 1985-08-14 Mixer

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US (1) US4676658A (en)
EP (1) EP0176718A3 (en)
DE (1) DE3433674A1 (en)

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Also Published As

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DE3433674C2 (en) 1993-04-01
US4676658A (en) 1987-06-30
EP0176718A3 (en) 1987-01-21
DE3433674A1 (en) 1986-03-20

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