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EP3342480B1 - Mixer comprising mixing tool - Google Patents

Mixer comprising mixing tool Download PDF

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Publication number
EP3342480B1
EP3342480B1 EP17152338.4A EP17152338A EP3342480B1 EP 3342480 B1 EP3342480 B1 EP 3342480B1 EP 17152338 A EP17152338 A EP 17152338A EP 3342480 B1 EP3342480 B1 EP 3342480B1
Authority
EP
European Patent Office
Prior art keywords
mixer
vanes
hub
rotation
mixing
Prior art date
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Active
Application number
EP17152338.4A
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German (de)
French (fr)
Other versions
EP3342480A1 (en
Inventor
Henning Kreis
Stephan Poller
Ralph Richter
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.)
Zeppelin Systems GmbH
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Zeppelin Systems GmbH
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Publication date
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Publication of EP3342480A1 publication Critical patent/EP3342480A1/en
Application granted granted Critical
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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
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0726—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis having stirring elements connected to the stirrer shaft each by a single radial rod, other than open frameworks
    • B01F27/07261—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis having stirring elements connected to the stirrer shaft each by a single radial rod, other than open frameworks of the anchor type, i.e. the stirring elements being connected to the rods by one end and extending parallel to the shaft axis
    • 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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/113—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller
    • B01F27/1133—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller the impeller being of airfoil or aerofoil type
    • 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

Definitions

  • the present invention relates to a mixer.
  • a mixer is from, for example EP 0963242 B1 or the DE198 48 536 A1 known.
  • Such a mixer in particular a container mixer, in which a mixing tool as described there is used, is used in particular for processing powdery, semolina and / or granular materials.
  • a mixing container filled with material to be mixed is usually closed by a mixer head.
  • the mixer head has the mixing tool.
  • the closed mixing container is rotated by 180 ° about a horizontal axis, so that the mixing tool is now arranged above the bottom of the mixer head.
  • the actual mixing process then takes place, in which the mixing tool usually rotates about a vertical axis in the mixing container.
  • a mixing tool in which on the front and rear edges of vanes which extend radially to a hub and at an angle to the vane are formed, the height of which, viewed perpendicularly to the plane of rotation of the respective vane in the direction of rotation of the hub, is increasingly formed up to near a rear end and then decreases again in an arc.
  • Deposits on the inner side wall and the bottom of the mixer head below the mixing tool, which occur during the mixing of the material to be mixed, are also problematic, to avoid which a high rotational speed is required, which, however, has the disadvantage of high temperature inputs into the material to be mixed.
  • Moving the tool blades close to the inner side wall or close to the floor is also associated with an increase in the power consumption of the mixer and high temperature inputs into the mix.
  • EP 0 211 279 A2 and DE 40 05 219 A1 each disclose a mixer with some features of claim 1.
  • the object of the present invention is to provide a mixer with a mixing tool, with which a good quality mixing with low temperature inputs and low power consumption as well as a reduction in remaining deposits is made possible.
  • Another object of the invention is to provide a mixer with low power consumption, which is also easier to clean.
  • the mixer according to the invention in particular a container mixer, has a mixing container and a mixer head with a bottom, a cylindrical inner side wall, a mixing tool rotatably mounted on the bottom of the mixer head and a tool drive for the mixing tool.
  • the mixing tool has a hub on which at least two vanes projecting radially or approximately radially to an axis of rotation of the hub are arranged.
  • the vanes are shaped such that their maximum thickness lies in a front section of the vanes when viewed in the direction of rotation of the hub.
  • the wings are wing-shaped, with a convex upper surface with a curvature that decreases substantially in the direction of rotation of the hub and a lower surface that continuously changes from a convexly curved section in the rotating direction of the hub to a concave curved rear section.
  • the wing-like shape of the wings of such a mixing tool is advantageous in many ways.
  • Such a mixing tool can achieve good mixing of the material to be mixed with the comparatively low running speed due to the improved buoyancy effect on the material to be mixed, which is caused by the movement of the blades, and the low air resistance.
  • Such blades can be positioned at a sufficiently large distance from the bottom of the mixer head, so that disassembly of the mixing tool is not necessary even for cleaning the mixing tool and the mixer, which is associated with great time savings.
  • the free ends of the wings each have an outer wing oriented at an angle to the respective wing.
  • Such an outer wing reduces the turbulence of the material to be mixed during the rotation of the mixing tool, so that a laminar flow is favored with which the material to be mixed is mixed, which helps to avoid deposits on the mixing tool and the side wall of the mixer.
  • the outer wings are wedge-shaped, with a convex front surface.
  • the outer wings are aligned obliquely to the axis of rotation of the hub.
  • the outer blades are preferably mounted on the free end of the blades.
  • a one-piece molding of the outer wings at the free end of the wings is also conceivable.
  • the vanes are also preferably mounted on the hub.
  • the span of the blades of the mixing tool is dimensioned such that the distance of a radially outer edge of the blades from the side inner wall of the mixer head is between 5% and 60% of the wingspan.
  • the distance between the underside of the blades and the base of the mixer head is preferably between 1% and 35% of the wingspan of the blades.
  • the transition between the bottom and the inner side wall is continuous, in particular as a circular peripheral section, which provides additional buoyancy of the material to be mixed when the mixing tool rotates.
  • this also enables a particularly cost-effective production of a mixer head, in which the base can be designed as a flat, circular disk-shaped plate, to which a circumferential side wall can be connected as part of the mixing container which can be placed on the mixer head.
  • top, bottom, left, right, front, rear, etc. refer exclusively to the exemplary representation and position of the mixing tool, the hub, the vanes, the outer vanes and the like selected in the respective figures. These terms are not to be understood as restrictive, i.e. these references can change due to different working positions or the mirror-symmetrical design or the like.
  • a mixer for powdery, semolina and / or granular substances is designated by the reference numeral 1 as a whole.
  • the mixer 1 essentially has a mixing container 8 onto which a mixer head 2 can be placed and with which the mixing container 8 can be closed.
  • the mixing container 8 and the mixer head 2 are held on a stand 12.
  • an outlet 9 is provided, through which the finished mixed material can be discharged from the mixing container 8.
  • a mixing tool 3 Arranged in the mixer head 2 is a mixing tool 3, which is rotatably mounted via a drive 7 parallel to a base 21 of the mixer head 2 on a drive shaft 10 which passes through the base 21 of the mixer head 2 and can be driven by the drive 7.
  • a hub 4 of the mixing tool 3 is fastened in a rotationally fixed manner on the drive shaft 10.
  • FIGS Figures 2 and 3rd An embodiment variant of such a mixing tool 3, arranged in two different variants of a mixer head 2, is shown in FIGS Figures 2 and 3rd shown.
  • the Figures 4 to 6 show a preferred embodiment of the mixing tool 3 in an individual representation from different perspectives.
  • the mixing tool 3 has three vanes 5 projecting radially or approximately radially to an axis of rotation A corresponding to the drive axis 10 of the drive 7.
  • the vanes 5 are shaped such that their maximum thickness d max lies in a front section 53 of the vanes 5, viewed in the direction of rotation R of the hub 4. In a rear section 54 of the wings, the thickness d of the wings slowly decreases.
  • the wings 5 are preferably shaped like an wing.
  • a wing shape is referred to here as a shape of the wing, in which a convex upper surface 51 with essentially in the direction of rotation D of the hub 4 is designed with a decreasing curvature and in which an underside 52 of the vanes 5 continuously changes from a convexly curved section 52a, which is front in the direction of rotation D of the hub 4, to a concave curved rear section 52b.
  • the wings 5 can be aligned parallel or at an angle to a plane perpendicular to the axis of rotation A of the hub 4.
  • the wings 5 are preferably oriented outwardly increasing by 0 ° to 45 ° to the horizontal.
  • the wings 5 are preferably flat. But it is also conceivable to form the wings 5 bent or kinked. For example, it is conceivable that, starting from the hub 4, the vanes 5 initially extend tilted parallel or at an angle to a plane perpendicular to the axis of rotation A of the hub 4 and bend up or down in a region remote from the hub 4.
  • an outer wing 6 is arranged at an angle to the respective wing 5.
  • the blades 5 are preferably aligned in the radial direction parallel and spaced from the bottom 21 of the mixer head 2.
  • the outer vanes 6 are preferably wedge-shaped, with a convexly shaped front surface 61, which is viewed in the direction of rotation D of the hub 4 during the mixing process, taper towards the rear to a wedge-shaped region 62.
  • the outer wings 6 are preferably oriented perpendicular to the longitudinal axis of the wings 5, the convexly shaped front surface 61 of the outer wings 6 preferably being tilted backwards by 15 ° to 45 °, in particular 20 °, from the vertical.
  • the wing width b of the wings 5 is formed with increasing distance from the hub 4 decreasing.
  • the vanes 5 arranged on the hub 4 are furthermore preferably arranged at the same angular distance from one another.
  • the outer wings 6 are preferably mounted on the free end of the wing 5.
  • the wings 5 themselves are preferably mounted on the hub 4 in a rotationally fixed manner. In principle, however, a one-piece design of the vanes 5 with the hub 4 is also conceivable.
  • the outer blades 6 are arranged spaced from cylindrical side inner walls 22 of the mixer head 2.
  • the mixer head 2 is in the in the Figures 2 and 3rd
  • the embodiment variants shown are cup-shaped, with a flat bottom 21 and a side inner wall 22 adjoining the bottom 21 circumferentially.
  • the transition between the bottom 21 and the side inner wall 22 is continuous here, in particular as a circular peripheral section.
  • the wingspan 5 is preferably dimensioned such that the distance of a radially outer edge of the wings 5 from the side inner wall 22 of the mixer head 2 is between 5% and 60% of the wingspan I of the wings 5.
  • the spacing of the blades 5 and the outer blades 6 from the side inner wall 22 of the mixer head 2 enables cleaning of the mixer head 2 with the mixing tool 3 installed, without having to disassemble it.
  • the distance between the underside 52 of the blades 5 from the bottom 21 of the mixer head 2 is preferably between 1% and 35% of the span I of the blades 5, particularly preferably between 5% and 15%.
  • the wing-shaped shape of the blades 5 also allows a sufficiently large distance of the blades 5 from the bottom 21 of the mixer head 2 to to be able to carry out cleaning without dismantling the mixing tool 3 and, at the same time, to achieve a sufficiently large suction effect when the mixing tool 3 rotates, in order to mix the mix to be mixed sufficiently in the mixer 1, the suction effect caused by the wing shape of the blades 5 being avoided at the same time of deposits on the bottom 21 of the mixer head 2 contributes.
  • the base 21 of the mixer head 2 is disc-shaped, so that the mixing container 8 can be placed directly on it, so that in this case the side wall 22 adjoining the base 21 as part of the mixing container 2 which can be placed on the mixer head 2 8 is formed.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Description

Die vorliegende Erfindung betrifft einen Mischer.The present invention relates to a mixer.

Ein Mischer ist beispielsweise aus der EP 0963242 B1 oder der DE198 48 536 A1 bekannt. Ein solcher Mischer, insbesondere ein Containermischer, in dem ein wie dort beschriebenes Mischwerkzeug eingesetzt wird, dient insbesondere der Verarbeitung pulver-, grieß- und/oder granulatförmiger Stoffe.A mixer is from, for example EP 0963242 B1 or the DE198 48 536 A1 known. Such a mixer, in particular a container mixer, in which a mixing tool as described there is used, is used in particular for processing powdery, semolina and / or granular materials.

Üblicherweise wird bei derartigen Mischern ein mit Mischgut gefüllter Mischbehälter durch einen Mischerkopf verschlossen. Der Mischerkopf weist dabei das Mischwerkzeug auf.In the case of such mixers, a mixing container filled with material to be mixed is usually closed by a mixer head. The mixer head has the mixing tool.

Nach dem Verschließen des Mischbehälters mit dem Mischerkopf wird der geschlossene Mischbehälter um eine horizontale Achse um 180° gedreht, so dass das Mischwerkzeug nun oberhalb des Bodens des Mischerkopfes angeordnet ist.After the mixing container has been closed with the mixer head, the closed mixing container is rotated by 180 ° about a horizontal axis, so that the mixing tool is now arranged above the bottom of the mixer head.

Danach erfolgt der eigentliche Mischprozess, bei dem sich das Mischwerkzeug üblicherweise um eine vertikale Achse in dem Mischbehälter dreht.The actual mixing process then takes place, in which the mixing tool usually rotates about a vertical axis in the mixing container.

Der oben beschriebene aus dem Stand der Technik benannte Mischer hat sich in der Praxis an sich bewährt.The mixer described above from the prior art has proven itself in practice.

Aus der US 2006/0092762 A1 ist ein Mischwerkzeug bekannt, bei dem an der Vorder- und der Rückkante von sich radial zu einer Nabe erstreckenden Flügeln winklig zum Flügel ausgerichtete Außenflügel angeformt sind, deren Höhe senkrecht zur Drehebene des jeweiligen Flügels in Drehrichtung der Nabe betrachtet bis nahe eines hinteren Endes zunehmend ausgebildet ist und anschließend bogenförmig wieder abnimmt.From the US 2006/0092762 A1 A mixing tool is known in which on the front and rear edges of vanes which extend radially to a hub and at an angle to the vane are formed, the height of which, viewed perpendicularly to the plane of rotation of the respective vane in the direction of rotation of the hub, is increasingly formed up to near a rear end and then decreases again in an arc.

Als problematisch bei diesem oder anderen aus dem Stand der Technik bekannten Mischern und den darin eingesetzten Mischwerkzeugen ist nach wie vor eine relativ hoher Temperatureintrag, bewirkt durch die Durchmischung des Mischgutes mit den sich drehenden Werkzeugflügeln des Mischwerkzeugs.The problem with this or other mixers known from the prior art and the mixing tools used therein is still a relatively high temperature input, caused by the mixing of the material to be mixed with the rotating tool blades of the mixing tool.

Problematisch sind außerdem während des Durchmischens des Mischgutes entstehende Ablagerungen an der Seiteninnenwand sowie dem Boden des Mischerkopfes unterhalb des Mischwerkzeugs, zu deren Vermeidung eine hohe Rotationsgeschwindigkeit erforderlich ist, welche allerdings den Nachteil hoher Temperatureinträge in das Mischgut hat.Deposits on the inner side wall and the bottom of the mixer head below the mixing tool, which occur during the mixing of the material to be mixed, are also problematic, to avoid which a high rotational speed is required, which, however, has the disadvantage of high temperature inputs into the material to be mixed.

Auch eine Heranführung der Werkzeugflügel nahe an die Seiteninnenwand oder nahe zum Boden geht mit einer Erhöhung der Leistungsaufnahme des Mischers und hoher Temperatureinträge in das Mischgut einher.Moving the tool blades close to the inner side wall or close to the floor is also associated with an increase in the power consumption of the mixer and high temperature inputs into the mix.

EP 0 211 279 A2 und DE 40 05 219 A1 offenbaren jeweils einen Mischer mit einigen Merkmalen des Anspruchs 1. EP 0 211 279 A2 and DE 40 05 219 A1 each disclose a mixer with some features of claim 1.

Aufgabe der vorliegenden Erfindung ist es, einen Mischer mit einem Mischwerkzeug bereitzustellen, mit dem eine qualitativ gute Durchmischung bei geringen Temperatureinträgen und geringer Leistungsaufnahme sowie Reduzierung verbleibender Ablagerungen ermöglicht ist.The object of the present invention is to provide a mixer with a mixing tool, with which a good quality mixing with low temperature inputs and low power consumption as well as a reduction in remaining deposits is made possible.

Weitere Aufgabe der Erfindung ist es, einen Mischer mit geringer Leistungsaufnahme bereitzustellen, der überdies einfacher zu reinigen ist.Another object of the invention is to provide a mixer with low power consumption, which is also easier to clean.

Diese Aufgaben werden durch einen Mischer mit den Merkmalen des Anspruchs 1 gelöst.These objects are achieved by a mixer with the features of claim 1.

Vorteilhafte Ausführungsvarianten sind in den Unteransprüchen angegeben.Advantageous design variants are specified in the subclaims.

Der erfindungsgemäße Mischer, insbesondere ein Containermischer, weist einen Mischbehälter und einen Mischerkopf mit einem Boden, einer zylindrischen Seiteninnenwand, einem an dem Boden des Mischerkopfes drehbar gelagerten Mischwerkzeug und einen Werkzeugantrieb für das Mischwerkzeug auf. Das Mischwerkzeug weist eine Nabe auf, an der wenigstens zwei radial oder annähernd radial zu einer Drehachse der Nabe vorstehende Flügel angeordnet sind.The mixer according to the invention, in particular a container mixer, has a mixing container and a mixer head with a bottom, a cylindrical inner side wall, a mixing tool rotatably mounted on the bottom of the mixer head and a tool drive for the mixing tool. The mixing tool has a hub on which at least two vanes projecting radially or approximately radially to an axis of rotation of the hub are arranged.

Die Flügel sind derart geformt, dass deren maximale Dicke in einem, in Rotationsrichtung der Nabe betrachtet, vorderem Abschnitt der Flügel liegt.The vanes are shaped such that their maximum thickness lies in a front section of the vanes when viewed in the direction of rotation of the hub.

Wie sich überraschend gezeigt hat, ist bei einer derartigen Ausrichtung der Flügel eine gegenüber Mischwerkzeugen mit beispielsweise keilförmigen Mischflügeln, die an ihrer in Laufrichtung betrachteten Vorderkante ihre minimale Dicke haben, eine verbesserte Durchmischung des Mischguts erreichen.As has surprisingly been shown, with such an alignment of the blades, an improved mixing of the material to be mixed is achieved compared to mixing tools with, for example, wedge-shaped mixing blades, which have their minimum thickness at their front edge viewed in the direction of travel.

Die Flügel sind tragflächenförmig geformt, mit einer konvex geformten Oberseite mit im Wesentlichen in Drehrichtung der Nabe nach hinten abnehmender Krümmung sowie einer Unterseite, die von einem konvex gekrümmten, in Drehrichtung der Nabe vorderen Abschnitt stetig in einen konkav gekrümmten hinteren Abschnitt übergeht.The wings are wing-shaped, with a convex upper surface with a curvature that decreases substantially in the direction of rotation of the hub and a lower surface that continuously changes from a convexly curved section in the rotating direction of the hub to a concave curved rear section.

Die tragflächenförmige Gestalt der Flügel eines solchen Mischwerkzeugs ist in vielerlei Hinsicht vorteilhaft.The wing-like shape of the wings of such a mixing tool is advantageous in many ways.

So kann ein solches Mischwerkzeug aufgrund der durch die Bewegung der Flügel hervorgerufenen verbesserten Auftriebswirkung auf das Mischgut und den geringen Luftwiderstand eines derart geformten Flügels bei vergleichsweise niedriger Laufgeschwindigkeit eine gute Durchmischung des Mischguts erreichen.Such a mixing tool can achieve good mixing of the material to be mixed with the comparatively low running speed due to the improved buoyancy effect on the material to be mixed, which is caused by the movement of the blades, and the low air resistance.

Solche Flügel können in einem ausreichend großen Abstand vom Boden des Mischerkopfes beabstandet positioniert werden, so dass auch für eine Reinigung des Mischwerkzeuges und des Mischers eine Demontage des Mischwerkzeugs nicht notwendig ist, was mit einer großen Zeitersparnis einhergeht.Such blades can be positioned at a sufficiently large distance from the bottom of the mixer head, so that disassembly of the mixing tool is not necessary even for cleaning the mixing tool and the mixer, which is associated with great time savings.

Die freien Enden der Flügel weisen jeweils einen winklig zum jeweiligen Flügel ausgerichteten Außenflügel auf.The free ends of the wings each have an outer wing oriented at an angle to the respective wing.

Durch einen solchen Außenflügel wird die Verwirbelung des Mischgutes bei der Rotation des Mischwerkzeugs reduziert, so dass dadurch eine Laminarströmung begünstigt wird, mit der das Mischgutes durchmischt wird, was zur Vermeidung von Ablagerungen am Mischwerkzeug und der Seitenwand des Mischers beiträgt.Such an outer wing reduces the turbulence of the material to be mixed during the rotation of the mixing tool, so that a laminar flow is favored with which the material to be mixed is mixed, which helps to avoid deposits on the mixing tool and the side wall of the mixer.

Die Außenflügel sind dabei keilförmig ausgebildet, mit einer konvex geformten Frontfläche.The outer wings are wedge-shaped, with a convex front surface.

Insbesondere sind die Außenflügel länglich zur Drehachse der Nabe gekippt ausgerichtet.In particular, the outer wings are aligned obliquely to the axis of rotation of the hub.

Zur einfachen Herstellung eines solchen Mischwerkzeugs sind die Außenflügel am freien Ende der Flügel bevorzugt montiert. Denkbar ist auch eine einstückige Anformung der Außenflügel am freien Ende der Flügel. Ebenso bevorzugt sind die Flügel an der Nabe montiert.For the simple manufacture of such a mixing tool, the outer blades are preferably mounted on the free end of the blades. A one-piece molding of the outer wings at the free end of the wings is also conceivable. The vanes are also preferably mounted on the hub.

Bei dem erfindungsgemäßen Mischer ist nach einer bevorzugten Ausführungsvariante die Spannweite der Flügel des Mischwerkzeugs derart bemessen, dass der Abstand eines radial äußeren Randes der Flügel von der Seiteninnenwand des Mischerkopfes zwischen 5 % und 60 % der Spannweite der Flügel beträgt.In the mixer according to the invention, according to a preferred embodiment variant, the span of the blades of the mixing tool is dimensioned such that the distance of a radially outer edge of the blades from the side inner wall of the mixer head is between 5% and 60% of the wingspan.

Insbesondere größere Abstände der äußeren Ränder der Flügel von der Seiteninnenwand sind dabei für die Reinigung des Mischbehälters von Vorteil.Larger distances of the outer edges of the wings from the side inner wall are particularly advantageous for cleaning the mixing container.

Durch die tragflächenförmige Gestaltung der Flügel ist trotz eines relativ großen Abstandes der Flügel von der Seiteninnenwand des Mischerkopfes oder des Mischbehälters eine hinreichende Sogwirkung einerseits für die Durchmischung des Mischguts und zum zweiten zur Verhinderung von Ablagerungen an der Seiteninnenwand gewährleistet.Due to the wing-shaped design of the blades, despite a relatively large distance between the blades and the side inner wall of the mixer head or the mixing container, a sufficient suction effect is ensured, on the one hand, for the mixing of the material to be mixed and, on the other hand, to prevent deposits on the side inner wall.

Bevorzugt beträgt auch der Abstand der Unterseite der Flügel vom Boden des Mischerkopfes zwischen 1 % und 35 % der Spannweite der Flügel.The distance between the underside of the blades and the base of the mixer head is preferably between 1% and 35% of the wingspan of the blades.

Auch hier sind insbesondere größere Abstände der Flügel vom Boden des Mischerkopfes für die Reinigung des Mischers von besonderem Vorteil.Larger distances between the blades and the bottom of the mixer head are particularly advantageous for cleaning the mixer.

Der Übergang zwischen dem Boden und der Seiteninnenwand ist nach einer bevorzugten Ausführungsvariante stetig, insbesondere als Kreisumfangsabschnitt ausgebildet, was für einen zusätzlichen Auftrieb des Mischgutes bei Rotation des Mischwerkzeugs sorgt.According to a preferred embodiment variant, the transition between the bottom and the inner side wall is continuous, in particular as a circular peripheral section, which provides additional buoyancy of the material to be mixed when the mixing tool rotates.

Denkbar ist auch, den Übergang zwischen Boden und der Seiteninnenwand unstetig als Winkel, insbesondere als rechten Winkel auszubilden.It is also conceivable to form the transition between the floor and the inner side wall discontinuously as an angle, in particular as a right angle.

Durch die tragflächenförmige Gestaltung der Flügel ist auch bei einer solchen Geometrie nach wie vor eine hinreichende Durchmischung des Mischgutes, bedingt durch die hinreichend große Auftriebskraft, erzeugt durch die tragflächenförmigem Flügel, ermöglicht.With the wing-shaped design of the wings, even with such a geometry, sufficient mixing of the mixed material is still possible, due to the sufficiently high buoyancy generated by the wing-shaped wings.

Diese ermöglicht insbesondere auch eine besonders kostengünstige Herstellung eines Mischerkopfes, bei dem der Boden als ebene, kreisscheibenförmige Platte ausgebildet sein kann, an die sich eine umfängliche Seitenwand als Teil des auf den Mischerkopf aufsetzbaren Mischbehälters anschließen kann.In particular, this also enables a particularly cost-effective production of a mixer head, in which the base can be designed as a flat, circular disk-shaped plate, to which a circumferential side wall can be connected as part of the mixing container which can be placed on the mixer head.

Nachfolgend werden bevorzugte Ausführungsbeispiele der Erfindung anhand der beiliegenden Zeichnungen näher erläutert. Es zeigen:

Fig. 1
eine Seitenansicht einer Ausführungsvariante eines Mischers mit Mischbehälter und Mischkopf,
Fig. 2
eine perspektivische Ansicht einer Ausführungsvariante eines Mischerkopfes mit darin angeordnetem Mischwerkzeug,
Fig. 3
eine Darstellung einer alternativen Ausführungsvariante eines Mischerkopfes mit durchgängig ebenem Boden,
Fig. 4
eine perspektivische Ansicht einer Ausführungsvariante eines Mischwerkzeuges,
Fig. 5
eine Draufsicht auf das in Fig. 4 gezeigte Mischwerkzeug,
Fig. 6
eine Seitenansicht auf das in Fig. 4 gezeigte Mischwerkzeug,
Fig. 7
eine Querschnittsansicht eines Flügels des Mischwerkzeugs entlang einer in Fig. 5 mit III bezeichneten Schnittebene, und
Fig. 8
eine Querschnittsansicht eines Außenflügels des Mischwerkzeugs entlang einer in Fig. 6 mit IV bezeichneten Schnittebene.
Preferred exemplary embodiments of the invention are explained in more detail below with reference to the accompanying drawings. Show it:
Fig. 1
2 shows a side view of an embodiment variant of a mixer with mixing container and mixing head,
Fig. 2
1 shows a perspective view of an embodiment variant of a mixer head with a mixing tool arranged therein,
Fig. 3
an illustration of an alternative embodiment variant of a mixer head with a consistently flat bottom,
Fig. 4
2 shows a perspective view of an embodiment variant of a mixing tool,
Fig. 5
a top view of the in Fig. 4 shown mixing tool,
Fig. 6
a side view of the in Fig. 4 shown mixing tool,
Fig. 7
a cross-sectional view of a wing of the mixing tool along an in Fig. 5 cutting plane designated III, and
Fig. 8
a cross-sectional view of an outer wing of the mixing tool along an in Fig. 6 cutting plane labeled IV.

In der nachfolgenden Figurenbeschreibung beziehen sich Begriffe wie oben, unten, links, rechts, vorne, hinten usw. ausschließlich auf die in den jeweiligen Figuren gewählte beispielhafte Darstellung und Position des Mischwerkzeugs, der Nabe, der Flügel, der Außenflügel und dergleichen. Diese Begriffe sind nicht einschränkend zu verstehen, d.h., durch verschiedene Arbeitsstellungen oder die spiegelsymmetrische Auslegung oder dergleichen können sich diese Bezüge ändern.In the following description of the figures, terms such as top, bottom, left, right, front, rear, etc. refer exclusively to the exemplary representation and position of the mixing tool, the hub, the vanes, the outer vanes and the like selected in the respective figures. These terms are not to be understood as restrictive, i.e. these references can change due to different working positions or the mirror-symmetrical design or the like.

In der Fig. 1 ist mit dem Bezugszeichen 1 insgesamt ein Mischer für pulver-, grieß- und/oder granulatförmiger Stoffe bezeichnet. Der Mischer 1 weist dabei im Wesentlichen einen Mischbehälter 8 auf, auf den ein Mischerkopf 2 aufsetzbar ist und mit dem der Mischbehälter 8 verschließbar ist.In the Fig. 1 a mixer for powdery, semolina and / or granular substances is designated by the reference numeral 1 as a whole. The mixer 1 essentially has a mixing container 8 onto which a mixer head 2 can be placed and with which the mixing container 8 can be closed.

Der Mischbehälter 8 und der Mischerkopf 2 sind dabei an einem Ständer 12 gehaltert. An dem Ständer 12 ist dabei eine Schwenkanordnung zur Verschwenkung des Mischbehälters 8 und des Mischerkopfes 2 um eine horizontale Drehachse 11 mithilfe eines Schwenkantriebs 13 angeordnet, um den Mischbehälter 8 aus einer Befüllungsstellung, in der die von dem Mischerkopf 2 zu verschließende Öffnung des Mischbehälters 8 nach oben ausgerichtet ist, in eine Arbeitsstellung, bei der der Mischbehälter 8, durch den Mischkopf 2 verschlossen, um 180° verschwenkt nach erfolgter Befüllung mit dem zu mischenden Mischgut so verschwenkt ist, dass der Mischerkopf 2 unterhalb des Mischbehälters 8 positioniert ist. Am dem Mischerkopf gegenüber liegenden Ende des Mischbehälters 8 ist ein Auslass 9 vorgesehen, durch den das fertig gemischte Mischgut aus dem Mischbehälters 8 abgeführt werden kann.The mixing container 8 and the mixer head 2 are held on a stand 12. On the stand 12 there is a pivoting arrangement for pivoting the mixing container 8 and the mixer head 2 about a horizontal axis of rotation 11 arranged by means of a swivel drive 13 in order to move the mixing container 8 from a filling position, in which the opening of the mixing container 8 to be closed by the mixing head 2, into a working position, in which the mixing container 8 is closed by the mixing head 2 Pivoted 180 ° after filling with the mix to be mixed is pivoted so that the mixer head 2 is positioned below the mixing container 8. At the end of the mixing container 8 opposite the mixer head, an outlet 9 is provided, through which the finished mixed material can be discharged from the mixing container 8.

In dem Mischerkopf 2 ist ein Mischwerkzeug 3 angeordnet, das über einen Antrieb 7 parallel zu einem Boden 21 des Mischerkopfes 2 rotierbar auf einer den Boden 21 des Mischerkopfes 2 durchtretenden und von dem Antrieb 7 antreibbare Antriebsachse 10 gelagert ist. Auf der Antriebsachse 10 ist eine Nabe 4 des Mischwerkzeugs 3 drehfest befestigt.Arranged in the mixer head 2 is a mixing tool 3, which is rotatably mounted via a drive 7 parallel to a base 21 of the mixer head 2 on a drive shaft 10 which passes through the base 21 of the mixer head 2 and can be driven by the drive 7. A hub 4 of the mixing tool 3 is fastened in a rotationally fixed manner on the drive shaft 10.

Eine Ausführungsvariante eines solchen Mischwerkzeugs 3, angeordnet in zwei unterschiedlichen Varianten eines Mischerkopfes 2, ist in den Figuren 2 und 3 gezeigt. Die Figuren 4 bis 6 zeigen eine bevorzugte Ausführungsvariante des Mischwerkzeuges 3 in einer Einzeldarstellung aus unterschiedlichen Perspektiven.An embodiment variant of such a mixing tool 3, arranged in two different variants of a mixer head 2, is shown in FIGS Figures 2 and 3rd shown. The Figures 4 to 6 show a preferred embodiment of the mixing tool 3 in an individual representation from different perspectives.

Das Mischwerkzeug 3 weist drei radial oder annähernd radial zu einer der Antriebsachse 10 des Antriebs 7 entsprechenden Drehachse A vorstehende Flügel 5 auf.The mixing tool 3 has three vanes 5 projecting radially or approximately radially to an axis of rotation A corresponding to the drive axis 10 of the drive 7.

Denkbar ist es auch, nur zwei oder mehr als drei solcher Flügel 5 an der Nabe 4 anzuordnen.It is also conceivable to arrange only two or more than three such vanes 5 on the hub 4.

Die Flügel 5 sind dabei so geformt, dass deren maximale Dicke dmax in einem, in Rotationsrichtung R der Nabe 4 betrachtet, vorderem Abschnitt 53 der Flügel 5 liegt. In einem hinteren Abschnitt 54 der Flügel nimmt die Dicke d der Flügel langsam ab.The vanes 5 are shaped such that their maximum thickness d max lies in a front section 53 of the vanes 5, viewed in the direction of rotation R of the hub 4. In a rear section 54 of the wings, the thickness d of the wings slowly decreases.

Wie in Figur 7 zu erkennen ist, sind die Flügel 5 bevorzugt tragflächenförmig geformt. Als tragflächenförmig wird hier eine Formgestalt der Flügel bezeichnet, bei der eine konvex geformten Oberseite 51 mit im Wesentlichen in Drehrichtung D der Nabe 4 nach hinten abnehmender Krümmung ausgebildet ist und bei der eine Unterseite 52 der Flügel 5 von einem konvex gekrümmten, in Drehrichtung D der Nabe 4 vorderen Abschnitt 52a stetig in einen konkav gekrümmten hinteren Abschnitt 52b übergeht.As in Figure 7 can be seen, the wings 5 are preferably shaped like an wing. A wing shape is referred to here as a shape of the wing, in which a convex upper surface 51 with essentially in the direction of rotation D of the hub 4 is designed with a decreasing curvature and in which an underside 52 of the vanes 5 continuously changes from a convexly curved section 52a, which is front in the direction of rotation D of the hub 4, to a concave curved rear section 52b.

Die Flügel 5 können dabei parallel oder winklig zu einer Ebene senkrecht zur Drehachse A der Nabe 4 gekippt ausgerichtet sein. So sind die Flügel 5 bevorzugt um 0° bis 45° zur Horizontalen nach außen ansteigend ausgerichtet.The wings 5 can be aligned parallel or at an angle to a plane perpendicular to the axis of rotation A of the hub 4. Thus, the wings 5 are preferably oriented outwardly increasing by 0 ° to 45 ° to the horizontal.

In radialer Erstreckung sind die Flügel 5 bevorzugt eben ausgebildet. Denkbar ist aber auch, die Flügel 5 gebogen oder geknickt auszubilden. So ist es beispielsweise denkbar, dass die Flügel 5 sich ausgehend von der Nabe 4 zunächst parallel oder winklig zu einer Ebene senkrecht zur Drehachse A der Nabe 4 gekippt ausgerichtet erstrecken und in einem von der Nabe 4 entfernten Bereich nach oben oder unten umzubiegen oder abzuknicken.In the radial extent, the wings 5 are preferably flat. But it is also conceivable to form the wings 5 bent or kinked. For example, it is conceivable that, starting from the hub 4, the vanes 5 initially extend tilted parallel or at an angle to a plane perpendicular to the axis of rotation A of the hub 4 and bend up or down in a region remote from the hub 4.

An den freien Enden der Flügel 5 ist jeweils einen winklig zum jeweiligen Flügel 5 ausgerichteter Außenflügel 6 angeordnet. Die Flügel 5 sind dabei bevorzugt in radiale Richtung parallel und beabstandet zum Boden 21 des Mischerkopfes 2 ausgerichtet. Die Außenflügel 6 sind bevorzugt keilförmig ausgebildet, mit einer konvex geformten Frontfläche 61, die sich in Drehrichtung D der Nabe 4 beim Mischprozess betrachtet, nach hinten zu einem keilförmigen Bereich 62 verjüngen.At the free ends of the wings 5 an outer wing 6 is arranged at an angle to the respective wing 5. The blades 5 are preferably aligned in the radial direction parallel and spaced from the bottom 21 of the mixer head 2. The outer vanes 6 are preferably wedge-shaped, with a convexly shaped front surface 61, which is viewed in the direction of rotation D of the hub 4 during the mixing process, taper towards the rear to a wedge-shaped region 62.

Wie in den Figuren 2 bis 4 und 6 gezeigt ist, sind die Außenflügel 6 bevorzugt senkrecht zur Längsachse der Flügel 5 ausgerichtet, wobei die konvex geformte Frontfläche 61 der Außenflügel 6 bevorzugt um 15° bis 45°, insbesondere um 20°, aus der Vertikalen nach hinten gekippt ausgerichtet sind.As in the Figures 2 to 4 and 6 is shown, the outer wings 6 are preferably oriented perpendicular to the longitudinal axis of the wings 5, the convexly shaped front surface 61 of the outer wings 6 preferably being tilted backwards by 15 ° to 45 °, in particular 20 °, from the vertical.

Des Weiteren ist, wie in Figur 5 gezeigt ist, die Flügelbreite b der Flügel 5 mit von der Nabe 4 zunehmendem Abstand abnehmend ausgebildet. Die an der Nabe 4 angeordneten Flügel 5 sind des Weiteren bevorzugt in gleichem Winkelabstand voneinander angeordnet. Die Außenflügel 6 sind bevorzugt am freien Ende der Flügel 5 montiert.Furthermore, as in Figure 5 is shown, the wing width b of the wings 5 is formed with increasing distance from the hub 4 decreasing. The vanes 5 arranged on the hub 4 are furthermore preferably arranged at the same angular distance from one another. The outer wings 6 are preferably mounted on the free end of the wing 5.

Denkbar ist prinzipiell aber auch eine einstückige Ausführung der Flügel 5 mit den Außenflügeln 6, beispielsweise durch ein Umknicken der Flügel 5 am äußeren Ende, wie es weiter oben beschrieben ist.In principle, however, a one-piece design of the wings 5 with the outer wings 6 is also conceivable, for example by bending the wings 5 at the outer end, as described above.

Die Flügel 5 selbst sind bevorzugt an der Nabe 4 drehfest montiert. Denkbar ist prinzipiell aber auch eine einstückige Ausführung der Flügel 5 mit der Nabe 4.The wings 5 themselves are preferably mounted on the hub 4 in a rotationally fixed manner. In principle, however, a one-piece design of the vanes 5 with the hub 4 is also conceivable.

Wie in den Figuren 2 und 3 des Weiteren erkennbar ist, sind die Außenflügel 6 abständig von zylindrischen Seiteninnenwänden 22 des Mischerkopfes 2 angeordnet.As in the Figures 2 and 3rd can also be seen, the outer blades 6 are arranged spaced from cylindrical side inner walls 22 of the mixer head 2.

Der Mischerkopf 2 ist in den in den Figuren 2 und 3 gezeigten Ausführungsvarianten topfförmig ausgebildet, mit einem ebenen Boden 21 und einer sich an den Boden 21 umfänglich anschließenden Seiteninnenwand 22.The mixer head 2 is in the in the Figures 2 and 3rd The embodiment variants shown are cup-shaped, with a flat bottom 21 and a side inner wall 22 adjoining the bottom 21 circumferentially.

Der Übergang zwischen dem Boden 21 und der Seiteninnenwand 22 ist hier stetig, insbesondere als Kreisumfangsabschnitt ausgebildet.The transition between the bottom 21 and the side inner wall 22 is continuous here, in particular as a circular peripheral section.

Die Spannweite der Flügel 5 ist bevorzugt derart bemessen, dass der Abstand eines radial äußeren Randes der Flügel 5 von der Seiteninnenwand 22 des Mischerkopfes 2 zwischen 5 % und 60 % der Spannweite I der Flügel 5 beträgt.The wingspan 5 is preferably dimensioned such that the distance of a radially outer edge of the wings 5 from the side inner wall 22 of the mixer head 2 is between 5% and 60% of the wingspan I of the wings 5.

Ein solcher Abstand ermöglicht einerseits eine hinreichende Durchmischung des Mischgutes, hervorgerufen durch die Sogwirkung des rotierenden Mischwerkzeugs 3.On the one hand, such a distance enables sufficient mixing of the material to be mixed, caused by the suction effect of the rotating mixing tool 3.

Zum zweiten ist durch die Beabstandung der Flügel 5 bzw. der Außenflügel 6 von der Seiteninnenwand 22 des Mischerkopfes 2 eine Reinigung des Mischerkopfes 2 bei eingebautem Mischwerkzeug 3 ermöglicht, ohne dies demontieren zu müssen.Secondly, the spacing of the blades 5 and the outer blades 6 from the side inner wall 22 of the mixer head 2 enables cleaning of the mixer head 2 with the mixing tool 3 installed, without having to disassemble it.

Der Abstand der Unterseite 52 der Flügel 5 vom Boden 21 des Mischerkopfes 2 beträgt bevorzugt zwischen 1 % und 35 % der Spannweite I der Flügel 5, besonders bevorzugt zwischen 5 % bis 15 %.The distance between the underside 52 of the blades 5 from the bottom 21 of the mixer head 2 is preferably between 1% and 35% of the span I of the blades 5, particularly preferably between 5% and 15%.

Die tragflächenförmige Ausformung der Flügel 5 ermöglicht auch hier einen hinreichend großen Abstand der Flügel 5 vom Boden 21 des Mischerkopfes 2, um eine Reinigung ohne Demontage des Mischwerkzeugs 3 durchführen zu können und gleichzeitig bei Rotation des Mischwerkzeugs 3 eine hinreichend große Sogwirkung zu erreichen, um das in dem Mischer 1 zu durchmischende Mischgut hinreichend zu durchmischen, wobei die durch die Tragflächenform der Flügel 5 verursachte Sogwirkung gleichzeitig zur Vermeidung von Ablagerungen auf dem Boden 21 des Mischerkopfes 2 beiträgt.The wing-shaped shape of the blades 5 also allows a sufficiently large distance of the blades 5 from the bottom 21 of the mixer head 2 to to be able to carry out cleaning without dismantling the mixing tool 3 and, at the same time, to achieve a sufficiently large suction effect when the mixing tool 3 rotates, in order to mix the mix to be mixed sufficiently in the mixer 1, the suction effect caused by the wing shape of the blades 5 being avoided at the same time of deposits on the bottom 21 of the mixer head 2 contributes.

Bei der in Figur 3 dargestellten Ausführungsvariante des Mischerkopfes 2 ist der Boden 21 des Mischerkopfes 2 scheibenförmig geformt, so dass auf diesem unmittelbar der Mischbehälter 8 aufsetzbar ist, so dass in diesem Fall die sich umfänglich an den Boden 21 anschließende Seitenwand 22 als Teil des auf den Mischerkopf 2 aufsetzbaren Mischbehälters 8 ausgebildet ist.At the in Figure 3 In the embodiment variant of the mixer head 2 shown, the base 21 of the mixer head 2 is disc-shaped, so that the mixing container 8 can be placed directly on it, so that in this case the side wall 22 adjoining the base 21 as part of the mixing container 2 which can be placed on the mixer head 2 8 is formed.

Neben der in den Figuren 2 und 3 dargestellten Positionierung des Mischerkopfes 2 ist es auch denkbar, das Mischwerkzeug 3 um 180° gedreht um eine horizontale Drehachse in dem Mischerkopf 2 zu positionieren.In addition to the in the Figures 2 and 3rd Positioning of the mixer head 2 shown is also conceivable to position the mixing tool 3 rotated by 180 ° about a horizontal axis of rotation in the mixer head 2.

Dadurch wird erreicht, dass das zu mischende Mischgut entsprechend im rotierenden Zustand des Mischwerkzeuges 3 in Richtung des Bodens 21 des Mischerkopfes 2 gedrückt bzw. gesogen wird.It is thereby achieved that the material to be mixed is pressed or sucked in the rotating state of the mixing tool 3 in the direction of the bottom 21 of the mixer head 2.

Bezugszeichenliste:Reference symbol list:

11
Mischermixer
22nd
MischerkopfMixer head
33rd
MischwerkzeugMixing tool
44th
Nabehub
55
Flügelwing
66
AußenflügelOuter wing
77
WerkzeugantriebTool drive
88th
MischbehälterMixing tank
99
AuslassOutlet
1010th
AntriebsachseDrive axle
1111
DrehachseAxis of rotation
1212
StänderStand
1313
SchwenkantriebSwivel drive
2121st
Bodenground
2222
SeiteninnenwandSide inner wall
2323
SeitenaußenwandSide outer wall
5151
OberseiteTop
5252
Unterseitebottom
52a52a
erster Abschnittfirst section
52b52b
zweiter Abschnittsecond part
5353
vorderer Abschnittfront section
5454
hinterer Abschnittrear section
6161
FrontflächeFront surface
6262
keilförmiger Bereichwedge-shaped area
AA
DrehachseAxis of rotation
bb
FlügelbreiteWing width
DD
DrehrichtungDirection of rotation
II.
Spannweitespan

Claims (11)

  1. Mixer (1) for powdery, gritty and/or granular materials, comprising a mixing container (8) and a mixer head (2) having a bottom (21), a cylindrical side inner wall (22), a mixing tool (3) rotatably mounted on the bottom (21) of the mixer head (2) and a tool drive (7) for the mixing tool (3), wherein the mixing tool (3) has a hub (4) on which at least two vanes (5) projecting radially or approximately radially to an axis of rotation (A) of the hub (4) and having a variable thickness (d) as viewed in the direction of rotation (D) of the hub (4) are arranged, wherein the vanes (5) are wing-shaped, wherein the vanes (5) are designed with a convexly shaped upper side (51) having a curvature decreasing rearwardly substantially in the direction of rotation (D) of the hub (4) and a lower side (52) which smoothly changes from a convexly curved front section (52a) in the direction of rotation (D) of the hub (4) to a concavely curved rear section (52b), and wherein the free ends of the vanes (5) each have an outer vane (6) oriented at an angle to the respective vane, wherein the vanes (5) are shaped in such a way that their maximum thickness (dmax) lies in a front section (53) of the vanes (5), as viewed in the direction of rotation (D) of the hub (4), and that the outer vanes (6) are wedge-shaped, having a convexly shaped front surface (61).
  2. Mixer (1) according to claim 1, characterized in that the outer vanes (6) are oriented tilted at an angle to the axis of rotation (A) of the hub (4).
  3. Mixer (1) according to one of the preceding claims, characterized in that the vanes (5) are oriented tilted at an angle to a plane perpendicular to the axis of rotation (A) of the hub (4).
  4. Mixer (1) according to one of the preceding claims, characterized in that the vanes (5) are formed in a bent or kinked manner.
  5. Mixer (1) according to one of the preceding claims, characterized in that the width (b) of the vanes (5) decreases with increasing distance from the hub (4).
  6. Mixer (1) according to one of the preceding claims, characterized in that three vanes (5) are arranged at the hub (4) at the same angular distance from one another.
  7. Mixer (1) according to one of the preceding claims, characterized in that the span (I) of the vanes (5) is dimensioned in such a way that the distance of a radially outer edge of the vanes (5) from the side inner wall (22) of the mixer head (2) is between 5% and 60% of the span (I) of the vanes (5).
  8. Mixer (1) according to one of the preceding claims, characterized in that the distance of the lower side (52) of the vanes (5) from the bottom (21) of the mixer head (2) is between 1% and 35% of the span (I) of the vanes (5).
  9. Mixer (1) according to one of the preceding claims, characterized in that the transition between the bottom (21) and the side inner wall (22) is continuous, in particular as a circumferential section of a circle, or discontinuous as an angle, in particular as a right angle.
  10. Mixer (1) according to one of the preceding claims, characterized in that the mixer head (2) is pot-shaped with the bottom (21) and a side wall (22) adjoining it circumferentially.
  11. Mixer (1) according to one of the preceding claims, characterized in that the bottom (2) of the mixer head (2) is disc-shaped and the side wall (22) circumferentially adjoining it is designed as part of the mixing container (8) which can be placed on the mixer head (2).
EP17152338.4A 2016-12-27 2017-01-20 Mixer comprising mixing tool Active EP3342480B1 (en)

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DE202016107397.9U DE202016107397U1 (en) 2016-12-27 2016-12-27 Mixing tool for a mixer and mixer

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DE202023105019U1 (en) 2023-09-01 2024-12-05 Dr. Herfeld Gmbh & Co. Kg Rotatory driven mixing tool and industrial mixing machine equipped with such a mixing tool

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