EP3789108B1 - Industrial mixing machine - Google Patents

Industrial mixing machine Download PDF

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Publication number
EP3789108B1
EP3789108B1 EP20193532.7A EP20193532A EP3789108B1 EP 3789108 B1 EP3789108 B1 EP 3789108B1 EP 20193532 A EP20193532 A EP 20193532A EP 3789108 B1 EP3789108 B1 EP 3789108B1
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EP
European Patent Office
Prior art keywords
wing
mixing
radial
machine according
mixing machine
Prior art date
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Application number
EP20193532.7A
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German (de)
French (fr)
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EP3789108A1 (en
Inventor
Wolfgang Rüberg
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Dr Herfeld GmbH and Co KG
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Dr Herfeld GmbH and Co KG
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Publication of EP3789108A1 publication Critical patent/EP3789108A1/en
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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
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1125—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis
    • B01F27/11253—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis the blades extending oblique to the stirrer 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
    • 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
    • B01F27/805—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis wherein the stirrers or the receptacles are moved in order to bring them into operative position; Means for fixing the receptacle
    • B01F27/807—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis wherein the stirrers or the receptacles are moved in order to bring them into operative position; Means for fixing the receptacle with the stirrer-head pivoting about a horizontal axis to bring it in and out of operative position, e.g. with receptacles pivoting about a horizontal axis for emptying
    • 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
    • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 
    • 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
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/2805—Mixing plastics, polymer material ingredients, monomers or oligomers

Definitions

  • the invention relates to an industrial mixing machine, comprising a mixing head, a frame and at least one connection means for connecting a mixing container containing a material to be mixed and open on the connection side to the mixing head for the purpose of forming a closed mixing container, which mixing head is part of an assembly that can be pivoted relative to the frame , so that the closed mixing container formed from the mixing head and mixing container can be pivoted in relation to the frame for carrying out the mixing process, and which mixing head has at least one mixing tool with a plurality of radial blades which is seated on a drive shaft which extends through the base of the mixing head and is driven in rotation by the latter, which radial blades have a cross-sectional geometry have, according to which, starting from its maximum thickness, the wing thickness decreases in the direction of rotation towards the rear end of the wing.
  • Mixing tools are used in industrial mixers, which are used for mixing in particular bulk material, typically powdered bulk material, such as is required for creating plastic granulate mixtures or also in the paint industry.
  • Mixing machines for these purposes have a mixing head that can be pivoted relative to a frame, which at the same time serves to close a mixing container containing the mixture, which is connected to the mixing head for the purpose of mixing a mixture therein. After connecting the container to the mixing head, a closed mixing container is formed from the mixing head and the mixing container containing the material to be mixed.
  • the mixing head has connection means for the purpose of connecting the container to the mixing head.
  • spindle strokes are used, with which the mixing container is pressed with its connecting flange against the connecting flange of the mixing head with the interposition of a seal.
  • these mixers are also referred to as container mixers.
  • the mixing head itself has a concavely curved bottom side which merges into a peripheral cylindrical wall which runs concentrically to the central axis of the mixing head and carries the connecting flange at its free end.
  • the mixing head carries at least one mixing tool, the drive shaft of which is passed through the bottom of the mixing head.
  • the mixing head itself is arranged pivotably in relation to the machine frame of the mixing machine, so that the mixing is arranged in an overhead position in relation to the mixing head, in which the mixing head is arranged at the bottom and the mixing container connected to it is arranged at the top.
  • This overhead position is necessary so that the material to be mixed contained in the mixing container comes into contact with the at least one mixing tool carried by the mixing head.
  • the rotationally driven mixing tool is used to generate a mix flow within the closed mixing chamber.
  • Such an industrial mixer is, for example, from EP 0 225 495 A2 known.
  • FR 1 361 011 A discloses a device for agglomerating powdered thermoplastics.
  • This device has a mixing container that can be closed with a lid.
  • a drive shaft is rotatably mounted.
  • These propellers are used to create intense turbulence.
  • the aim is to cause countercurrents through such vortex fields in order to improve mixing. Even only weak vortices should be formed on the surfaces of the propellers.
  • the level of turbulence in the mix can be adjusted by adjusting the angle of the propellers.
  • the opposing flows of mixed material are generated by turning on the propellers in the opposite direction.
  • a mixing tool as described above is off DE 20 2016 107 397 U1 known.
  • the radial wings of the mixing tool known from this document have a cross-sectional geometry that of Corresponds to cross-sectional geometry of the wing of an airplane.
  • the cross-sectional geometry of the radial vanes is shaped like an airfoil and has a convex-shaped upper side with a curvature that decreases essentially backwards in the direction of rotation and an underside that gradually changes from a convexly curved section at the front in the direction of rotation to a concavely curved rear section.
  • the front side pointing in the direction of rotation is convexly curved.
  • the radial vanes can carry outer vanes which have a wedge-shaped cross-sectional geometry, with the thickness of the outer vanes decreasing counter to the direction of rotation.
  • the aerofoil cross-sectional geometry of the radial wings is said to be responsible for good mixing at relatively low running speeds. Due to the special cross-sectional geometry of the radial blades, the production of the same is relatively expensive, which drives up the costs of such a blade mixing tool.
  • the invention is based on the object of further developing a mixing machine with a mixing tool which has a plurality of radial blades of the type described above in such a way that there is good mixing ability not only with low mileage and bottom or wall caking in the mixing head or on the walls of the mixing container are reduced, but whose mixing tool can also be produced more cheaply.
  • the underside of the radial wings of the mixing tool are more inclined relative to a horizontal line than the upper sides of the wings, specifically in the section of decreasing wing thickness.
  • the horizontal in the context of these statements is a straight line in that plane which runs at right angles to the axis of rotation of the mixing tool.
  • the underside of the wing is inclined pointing in the direction of rotation. This means that an imaginary extension of the underside of the blade in the direction of rotation runs towards the bottom of the mixing container.
  • the radial wings are designed over their entire extent in the direction of rotation (their cross-sectional width) in such a way that an imaginary straight line connecting the rear end with the respective front end is inclined in the same direction as the slope of the underside of the wing in the section of decreasing thickness.
  • the front end of such a radial wing when projected in a common vertical plane with the rear wing end, is at a lower level than the rear radial wing end.
  • the radial wings taper towards the rear end of the wing.
  • the maximum thickness in the radial vane cross-section is preferably spaced from the rotationally facing front termination of the radial vanes.
  • the wing top of the radial wing is inclined in the same direction as the wing underside.
  • the upper side of the wing is used as a whole and thus also in its section between the maximum wing thickness and the rear end of the wing in order to impart an upward moment to the mixed material particles contacting the upper side of the wing as a result of the rotation of the radial wings.
  • Such a cross-sectional geometry can be formed with straight wing surfaces, the adjoining edges of which can certainly be rounded.
  • a particularly simple radial wing cross-section geometry has a radial wing which, in terms of its cross section, is designed to be mirror-symmetrical to the plane in which the straight line connecting the rear end with the front end lies.
  • the special spatial position of the radial blades with their inclination ensures, even with such a geometrically simple cross-sectional design, that an upward moment acting on the mixed material particles is exerted on the underside of the blades. It was surprising to find that with such a relatively simple cross-sectional geometry of the radial blades, which deviates from a conventional blade profile, an excellent mixing result is achieved as a result of the special alignment of the same in relation to the movement of the same through the mixed material.
  • the wing undersides of the radial wings are straight from their maximum thickness to the rear wing end.
  • virtually the entire underside of the wing is straight, ie from the front to the rear wing end.
  • the upper side of the wing can also be straight, at least in the section of decreasing thickness. Only the area of maximum thickness is typically rounded, as is the front side of the wing pointing in the direction of rotation.
  • the inclination of the imaginary straight line between the rear and the front wing closure is inclined at most with that angle to the horizontal with which the wing underside in the section to rear end of the wing is inclined towards the horizontal with decreasing thickness.
  • the underside of the wing does not have any indentations, such as concave sections, which simplifies their manufacturability.
  • the front of the radial vanes can be rounded, for example with a rounding with a constant radius. It goes without saying that the radius can also not be constant. Then, as a rule, the radius between the termination of such a radial wing pointing in the direction of rotation toward the upper side of the wing will be designed with a larger radius than that part of the curve that connects the front termination of the radial wing to the underside of the wing. It is also entirely possible to design the front end of such a radial wing as an edge, preferably rounded, by bringing the upper side of the wing together with the underside of the wing.
  • the radial vanes each carry an outer vane at their end.
  • This preferably has the same cross-sectional geometry as the radial vanes.
  • the outer wings are arranged with respect to their cross-sectional geometry such that that wing side which is the underside in the case of radial flights is the wing side pointing outwards in the radial direction in the case of the outer wings.
  • the outer wing sides of the outer wing are preferably positioned in relation to a cylindrical lateral surface enveloping the outer wing sides in the same way as the wing underside is positioned in relation to a horizontal.
  • the angle of attack of the wing outer sides with respect to the enveloping cylindrical lateral surface can be the same as the angle of attack of the wing undersides with respect to a horizontal.
  • the angle of attack of the outer sides of the wing relative to the enveloping cylindrical lateral surface can also differ from the inclination of the underside of the wing relative to a horizontal line, for example it can be a few angular degrees smaller.
  • a mixing machine 1 is used for the industrial mixing of material to be mixed in a mixing container, for example plastic granules.
  • the mixing machine 1 has a frame 2, which in the illustrated embodiment is provided by two stands 3, 3.1.
  • a container entrance 4 is located between the uprights 3, 3.1 in the area of the floor.
  • the container entrance 4 is bounded laterally in the direction of the uprights 3, 3.1 by a respective side wall 5, 5.1.
  • the two stands 3, 3.1 are connected to one another via a pivotable assembly 6.
  • the pivotable assembly 6 comprises a frame component 7, on each of whose two narrow sides there is a pivot shaft 8 is attached.
  • the pivot shaft 8 is mounted in the stands 3, 3.1.
  • In the stand 3 there is an electric motor drive 9 with which the pivotable assembly 6 can be pivoted about the axis of its pivot shaft 8 .
  • the lifting devices 10, 10.1 have the same structure.
  • the basic structure of the lifting device 10 is described below. These statements apply equally to the lifting device 10.1.
  • the lifting device 10 has a lifting plate 11 as part of a lifting plate unit that can be moved in the vertical direction by a spindle 12 .
  • the lifting plate unit is guided on a guide 13.
  • the spindle 12 is driven by an electric motor.
  • the lifting plate unit can be adjusted in the vertical direction by means of the spindle 12 . In figure 1 it is shown in its lowest position.
  • Part of the lifting plate unit is also a locking lever 14, which is about a vertical pivot axis from its in figure 1 basic position shown can be pivoted in the direction of the mixing container recording.
  • the pivoting of the locking lever 14 serves to lock a mixing container that has been driven into the container entrance 4 .
  • the locking lever 4 acts against the outer wall of such a mixing container.
  • the lifting device 10 can be moved in the direction of the longitudinal extent of the pivot axis of the pivotable assembly 6 by means of an electric motor 15 as part of the pivotable assembly 6 .
  • the electric motor 15 drives a respective spindle drive.
  • the pivoting assembly also includes a mixing head, from which figure 1 its top (outside) is visible.
  • the mixing head 16 with the two lifting devices 10, 10.1 is cardanically suspended within the frame component 7.
  • the mixing head 16 with its two lifting devices 10, 10.1 can be pivoted about an axis of rotation running transversely to the pivoting axis of the frame component 7.
  • the mixing head can be 16 ⁇ m two axes standing at right angles to one another can be pivoted when the mixing machine 1 is in operation. This allows a mixing process to be carried out in which a mixing container connected to the mixing head 16 performs a multi-dimensional oscillating movement.
  • Part of the mixing head 16 is a top plate 17 that forms a base to the interior of the mixing container.
  • a drive shaft 18 extends through the top plate 17 and is driven by an electric motor 19 (see Fig. figure 2 ).
  • a mixing tool 19 sits on the drive shaft 18 at a distance from the upper side of the head plate 17 forming the base.
  • the mixing tool 19 is a wing tool which carries three radial wings 20, 20.1, 20.2.
  • the radial vanes 20, 20.1, 20.2 are connected to the hub 21 of the mixing tool 19 at the same angular distance from one another.
  • the radial wings 20, 20.1, 20.2 are all constructed identically.
  • Each radial wing 20, 20.1, 20.2 carries an outer wing 22, 22.1, 22.2 at its radially outer end, each connected to the upper side of the wing.
  • the connection of the outer wings 22, 22.1, 22.2 is shown schematically in the figures. In practice, the radial wing will always be designed with a slight radius between the two wing sections.
  • FIG 2 the inner lateral surface 23 of a mixing container connected to the mixing head 16 and otherwise not shown in detail is shown. This is used to visualize the radially outer distance of the outer wings 22, 22.1, 22.2 from the inside of a mixing container, which is represented by the lateral surface.
  • FIG 3 shows the mixing tool 19 in a perspective view on its own.
  • the cross-sectional geometry of the radial vanes 20, 20.1, 20.2 is already clear from this illustration. This is below with reference to the Figures 4 and 5 explained with reference to the radial vane 20.
  • the radial vane 20--the same also applies to the two other radial vanes 20.1, 20.2--have a wedge-shaped cross-sectional geometry pointing counter to the direction of rotation with a rounded end face pointing in the direction of rotation.
  • the direction of rotation of the mixing tool 19 is indicated in these figures with a block arrow.
  • figure 5 shows the cross-sectional profile of the radial wing 20 in an enlarged view, without the outer wing 22 formed on the end. In the illustration, this is in the horizontal plane. Regardless of the current spatial position of the top plate, this plane is the plane that is perpendicular to the axis of rotation of the mixing tool 19 .
  • the underside 24 of the wing which is straight and thus designed without additional contours, encloses an angle ⁇ of approximately 25° with the horizontal H.
  • the top side 25 of the wing is also straight and, in the illustrated embodiment, is inclined in the same direction as the bottom side 24 of the wing, but only by a few degrees.
  • the inclination of the wing top 25 is also in the representation figure 4 of the mixing tool 19 can be seen on the radial wing 20.2, in which view the radial wing 20.2 is shown from its front side and in this perspective the upper side of the wing, which rises due to its inclination, is visible.
  • the underside of the wing 24 and the top of the wing 25 with their straight sections represent that section of the radial wing 20 whose thickness decreases from its maximum thickness in the direction of the rear wing end 26 .
  • the rear termination of the radial wing 20 provided by the wing end 26 is at a higher level in relation to a vertical than the front termination of the straight section of the wing top 25 pointing in the direction of rotation.
  • the wing bottom 24 and wing top, which are straight without additional contours 25 are brought together at the end of the wing 26 due to their different inclination.
  • the underside 24 of the wing encloses an angle ⁇ of about 20° with the top side 25 of the wing.
  • the end face 27 of the radial wing 20 is rounded, specifically with a constant radius of curvature in the exemplary embodiment shown.
  • a straight line G connecting the wing end 26 to the front wing end pointing in the direction of rotation is inclined in the same direction as the slope of the underside 24 of the wing.
  • the inclination of this straight line G is about 12° less than the inclination of the underside of the wing 24 relative to the horizontal H.
  • the radial wing 20 is constructed mirror-symmetrically with respect to the plane in which the straight line G is located.
  • the plane in which the straight line G is located is the median longitudinal plane of the radial wing 20.
  • the outer wing 22 on the radial wing 20 shows the same cross-sectional geometry as the radial wing 20 and in relation to the lateral surface 23 of a mixing container the same wing setting.
  • the wing side 28 pointing outwards in the radial direction is also set in relation to the lateral surface 23, as is the wing underside 24 in relation to the horizontal H.
  • the angle of the wing side 28 of the outer wing 22 with the lateral surface 23 is a few angular degrees smaller in the illustrated embodiment than the angle of incidence ⁇ of the underside 24 of the wing relative to the horizontal H.
  • FIG 6 shows another mixing tool 19.1, which is constructed in principle like the mixing tool 19 of the preceding figures.
  • the mixing tool 19.1 differs from that of the mixing tool 19 in the specific cross-sectional geometry of its radial wings 29, 29.1, 29.2 figure 7 recognizable.
  • the cross-sectional geometry of the radial wing 29 - the same also applies to the other two radial wing 29.1, 29.2 - differs from that of the radial wing 20 in that the underside of the wing 30 is generally straight and the underside of the wing 30 thus corresponds to the imaginary straight line connecting the end of the wing with the front end connects.
  • the wing top 31 has a straight rear section which defines the section of decreasing thickness starting from the maximum thickness of the radial wing 29 .
  • This radial wing 29 has its greatest thickness (distance from the underside 30 of the wing) to the wing top 31 compared to the radial wing 20 somewhat further back from its front end. At this point, the upper side 31 of the wing is rounded to form an apex and is brought up to the lower side 30 of the wing at the front, forming an edge.
  • the mixing tool 19.1 rotates, the material to be mixed is conveyed exclusively upwards and thus away from the top plate 17 by the radial vane 29.
  • this mixing tool 19.1 more mixed material that is not caught by the radial wing 29 and is located below its path of movement in the direction of the head plate 17 is whirled up during operation, since the radial wing 29, in contrast to the radial wing 20, does not produce any parts of the mixed material in the direction be displaced towards the top plate 17.

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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)
  • Processing Of Solid Wastes (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Description

Die Erfindung betrifft eine industrielle Mischmaschine, umfassend einen Mischkopf, ein Gestell sowie zumindest ein Anschlussmittel zum Anschließen eines ein Mischgut enthaltenden, anschlussseitig offenen Mischcontainers an den Mischkopf zum Zwecke der Ausbildung eines geschlossenen Mischbehälters, welcher Mischkopf Teil einer gegenüber dem Gestell schwenkbaren Baugruppe dergestalt gelagert ist, so dass der aus Mischkopf und Mischcontainer gebildete geschlossene Mischbehälter zum Durchführen des Mischprozesses gegenüber dem Gestell verschwenkbar ist, und welcher Mischkopf wenigstens ein auf einer den Boden des Mischkopfes durchgreifenden Antriebswelle sitzendes und durch diese rotatorisch angetriebenes Mischwerkzeug mit mehreren Radialflügeln aufweist, welche Radialflügel eine Querschnittsgeometrie aufweisen, gemäß der ausgehend von ihrer maximalen Dicke die Flügeldicke in Rotationsrichtung zum hinteren Flügelende hin abnimmt.The invention relates to an industrial mixing machine, comprising a mixing head, a frame and at least one connection means for connecting a mixing container containing a material to be mixed and open on the connection side to the mixing head for the purpose of forming a closed mixing container, which mixing head is part of an assembly that can be pivoted relative to the frame , so that the closed mixing container formed from the mixing head and mixing container can be pivoted in relation to the frame for carrying out the mixing process, and which mixing head has at least one mixing tool with a plurality of radial blades which is seated on a drive shaft which extends through the base of the mixing head and is driven in rotation by the latter, which radial blades have a cross-sectional geometry have, according to which, starting from its maximum thickness, the wing thickness decreases in the direction of rotation towards the rear end of the wing.

Bei industriellen Mischern werden Mischwerkzeuge eingesetzt, die zum Mischen insbesondere von Schüttgut, typischerweise pulverförmigem Schüttgut, wie dieses etwa zum Erstellen von Kunststoffgranulatgemischen oder auch in der Farbindustrie benötigt wird. Mischmaschinen für diese Zwecke verfügen über einen gegenüber einem Gestell schwenkbaren Mischkopf, der gleichzeitig zum Verschließen eines das Mischgut enthaltenden Mischcontainers dient, der zum Zwecke des Mischens eines darin befindlichen Mischgutes an den Mischkopf angeschlossen wird. Nach Anschließen des Behältnisses an den Mischkopf ist aus dem Mischkopf und dem das Mischgut enthaltenen Mischcontainer ein geschlossener Mischbehälter gebildet. Zum Zwecke des Anschließens des Behältnisses an den Mischkopf verfügt der Mischkopf über Anschlussmittel. Hierbei handelt es sich unter anderem um einen in radialer Richtung nach außen abragenden umlaufenden Anschlussflansch, an den der komplementäre Anschlussflansch des Mischcontainers zur Anlage gebracht wird. Hierzu werden beispielsweise Spindelhübe eingesetzt, mit denen der Mischcontainer mit seinem Anschlussflansch gegen den Anschlussflansch des Mischkopfes unter Zwischenschaltung einer Dichtung gepresst wird. Aufgrund des Umstandes, dass bei diesen Mischmaschinen ein das Mischgut enthaltender Mischcontainer an den Mischkopf angeschlossen wird, werden diese Mischer auch als Containermischer angesprochen. Der Mischkopf selbst verfügt über eine konkav gekrümmte Bodenseite, die in eine umlaufende zylindrische Wand übergeht, die konzentrisch zur Zentrumsachse des Mischkopfes verläuft und an ihrem freien Ende den Anschlussflansch trägt. Der Mischkopf trägt zumindest ein Mischwerkzeug, dessen Antriebswelle durch den Boden des Mischkopfes hindurchgeführt ist.Mixing tools are used in industrial mixers, which are used for mixing in particular bulk material, typically powdered bulk material, such as is required for creating plastic granulate mixtures or also in the paint industry. Mixing machines for these purposes have a mixing head that can be pivoted relative to a frame, which at the same time serves to close a mixing container containing the mixture, which is connected to the mixing head for the purpose of mixing a mixture therein. After connecting the container to the mixing head, a closed mixing container is formed from the mixing head and the mixing container containing the material to be mixed. The mixing head has connection means for the purpose of connecting the container to the mixing head. This is, inter alia, a peripheral connecting flange which protrudes outwards in the radial direction and on which the complementary connecting flange of the mixing container is brought into contact. For this purpose, for example, spindle strokes are used, with which the mixing container is pressed with its connecting flange against the connecting flange of the mixing head with the interposition of a seal. Due to the fact that at a mixing container containing the material to be mixed is connected to the mixing head of these mixing machines, these mixers are also referred to as container mixers. The mixing head itself has a concavely curved bottom side which merges into a peripheral cylindrical wall which runs concentrically to the central axis of the mixing head and carries the connecting flange at its free end. The mixing head carries at least one mixing tool, the drive shaft of which is passed through the bottom of the mixing head.

Der Mischkopf selbst ist schwenkbar gegenüber dem Maschinengestell der Mischmaschine angeordnet, damit das Mischen in Bezug auf den Mischkopf in einer Überkopfstellung, bei der der Mischkopf zuunterst und der daran angeschlossene Mischcontainer zuoberst angeordnet sind. Diese Überkopfstellung ist erforderlich, damit das in dem Mischcontainer enthaltene Mischgut in Kontakt mit dem zumindest einen von dem Mischkopf getragenen Mischwerkzeug kommt. Das rotatorisch angetriebene Mischwerkzeug dient zum Erzeugen eines Mischgutstromes innerhalb des geschlossenen Mischraumes. Ein solcher industrieller Mischer ist beispielsweise aus EP 0 225 495 A2 bekannt.The mixing head itself is arranged pivotably in relation to the machine frame of the mixing machine, so that the mixing is arranged in an overhead position in relation to the mixing head, in which the mixing head is arranged at the bottom and the mixing container connected to it is arranged at the top. This overhead position is necessary so that the material to be mixed contained in the mixing container comes into contact with the at least one mixing tool carried by the mixing head. The rotationally driven mixing tool is used to generate a mix flow within the closed mixing chamber. Such an industrial mixer is, for example, from EP 0 225 495 A2 known.

FR 1 361 011 A offenbart eine Vorrichtung zum Agglomerieren von pulverförmigen thermoplastischen Kunststoffen. Diese Vorrichtung verfügt über einen durch einen Deckel verschließbaren Mischbehälter. In diesem ist drehbar eine Antriebswelle gelagert. Diese trägt mehrere, in Längsrichtung der Antriebswelle übereinander angeordnete Propeller. Diese Propeller dienen zum Erzeugen von intensiven Verwirbelungen. Ziel ist, Gegenströmungen durch solche Wirbelfelder zu verursachen, um die Vermischung zu verbessern. Auf den Oberflächen der Propeller sollen selbst nur schwache Wirbel ausgebildet werden. Das Maß der Verwirbelung in dem Mischgut kann durch eine Anstellung des Winkels der Propeller erfolgen. Die entgegengerichteten Mischgutströme werden durch entsprechend gegensinniges Anstellen der Propeller erzeugt. FR 1 361 011 A discloses a device for agglomerating powdered thermoplastics. This device has a mixing container that can be closed with a lid. In this, a drive shaft is rotatably mounted. This carries several propellers arranged one above the other in the longitudinal direction of the drive shaft. These propellers are used to create intense turbulence. The aim is to cause countercurrents through such vortex fields in order to improve mixing. Even only weak vortices should be formed on the surfaces of the propellers. The level of turbulence in the mix can be adjusted by adjusting the angle of the propellers. The opposing flows of mixed material are generated by turning on the propellers in the opposite direction.

Ein Mischwerkzeug, wie dieses vorstehend beschrieben ist, ist aus DE 20 2016 107 397 U1 bekannt. Die Radialflügel des aus diesem Dokument bekannten Mischwerkzeuges weisen eine Querschnittsgeometrie auf, die der Querschnittsgeometrie der Tragfläche eines Flugzeuges entspricht. Die Querschnittsgeometrie der Radialflügel ist tragflächenförmig geformt und weist eine konvex geformte Oberseite mit im Wesentlichen in Rotationsrichtung nach hinten abnehmender Krümmung und eine Unterseite auf, die von einem konvex gekrümmten, in Rotationsrichtung vorderen Abschnitt stetig in einen konkav gekrümmten hinteren Abschnitt übergeht. Die in Rotationsrichtung weisende Vorderseite ist konvex gekrümmt. Mit diesem Mischwerkzeug soll eine qualitativ gute Durchmischung bei geringem Temperatureintrag und geringer Leistungsabnahme möglich sein. Zudem sollen Wand- und Bodenablagerungen reduziert sein. An ihren radial äußeren Enden können die Radialflügel Außenflügel tragen, die eine keilförmige Querschnittsgeometrie aufweisen, wobei die Dicke der Außenflügel entgegen der Rotationsrichtung abnimmt. Die tragflächenförmige Querschnittsgeometrie der Radialflügel soll für die gute Durchmischung bei relativ niedriger Laufgeschwindigkeit verantwortlich sein. Aufgrund der besonderen Querschnittsgeometrie der Radialflügel ist die Herstellung derselben relativ aufwendig, was die Kosten eines solchen Flügelmischwerkzeuges in die Höhe treibt.A mixing tool as described above is off DE 20 2016 107 397 U1 known. The radial wings of the mixing tool known from this document have a cross-sectional geometry that of Corresponds to cross-sectional geometry of the wing of an airplane. The cross-sectional geometry of the radial vanes is shaped like an airfoil and has a convex-shaped upper side with a curvature that decreases essentially backwards in the direction of rotation and an underside that gradually changes from a convexly curved section at the front in the direction of rotation to a concavely curved rear section. The front side pointing in the direction of rotation is convexly curved. With this mixing tool, qualitatively good mixing should be possible with low temperature input and low power consumption. In addition, wall and floor deposits should be reduced. At their radially outer ends, the radial vanes can carry outer vanes which have a wedge-shaped cross-sectional geometry, with the thickness of the outer vanes decreasing counter to the direction of rotation. The aerofoil cross-sectional geometry of the radial wings is said to be responsible for good mixing at relatively low running speeds. Due to the special cross-sectional geometry of the radial blades, the production of the same is relatively expensive, which drives up the costs of such a blade mixing tool.

DE 20 2016 107 397 U1 offenbart eine Mischmaschine entsprechend dem Oberbegriff des Anspruchs 1. DE 20 2016 107 397 U1 discloses a mixing machine according to the preamble of claim 1.

Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine Mischmaschine mit einem Mischwerkzeug, welches mehrere Radialflügel der vorbeschriebenen Art aufweist dergestalt weiterzubilden, dass nicht nur bei geringer Laufleistung eine gute Durchmischbarkeit gegeben ist und Boden- bzw. Wandanbackungen im Mischkopf bzw. an den Wänden des Mischcontainers reduziert sind, sondern deren Mischwerkzeug sich auch kostengünstiger herstellen lässt. Darüber hinaus wäre es wünschenswert, wenn mit dem Mischwerkzeug das Mischergebnis zudem noch verbessert werden könnte, um auf diese Weise die erforderliche Mischzeit reduzieren zu können.Proceeding from this state of the art, the invention is based on the object of further developing a mixing machine with a mixing tool which has a plurality of radial blades of the type described above in such a way that there is good mixing ability not only with low mileage and bottom or wall caking in the mixing head or on the walls of the mixing container are reduced, but whose mixing tool can also be produced more cheaply. In addition, it would be desirable if the mixing result could also be improved with the mixing tool in order to be able to reduce the required mixing time in this way.

Gelöst wird diese Aufgabe erfindungsgemäß durch eine eingangs genannte, gattungsgemäße Mischmaschine, bei der die Flügeloberseite der Radialflügel gleichsinnig zu der Flügelunterseite geneigt ist, dass in dem Abschnitt abnehmender Flügeldicke die Flügelunterseite in Rotationsrichtung zur Horizontalen stärker angestellt ist als die Flügeloberseite und bei dem eine den hinteren Abschluss der Radialflügel mit ihrem jeweilig vorderen Abschluss verbindende gedachte Gerade gleichsinnig zu der Neigung der Flügelunterseite in dem Abschnitt abnehmender Dicke gegenüber der Horizontalen geneigt ist.This object is achieved according to the invention by a generic mixing machine mentioned at the outset, in which the upper side of the radial wings is inclined in the same direction as the underside of the wings, so that in the section of decreasing wing thickness the underside of the wings is more inclined to the horizontal in the direction of rotation than the upper side of the wings and in which one the rear Termination of the radial wings with their respective front termination connecting imaginary straight line in the same direction as the inclination of the wing underside is inclined to the horizontal in the section of decreasing thickness.

Bei einer Mischmaschine mit einem derartigen Mischwerkzeug kann trotz der im Vergleich zu vorbekannten Mischwerkzeugen dieser Art einfacheren Geometrie der Querschnitte seiner Radialflügel überraschenderweise ein verbessertes Mischergebnis erzielt werden. Die Radialflügel des Mischwerkzeuges sind mit ihrer Flügelunterseite gegenüber einer Horizontalen stärker angestellt als die Flügeloberseiten, und zwar in dem Abschnitt abnehmender Flügeldicke. Die Horizontale im Rahmen dieser Ausführungen ist eine Gerade in derjenigen Ebene, die rechtwinklig zur Drehachse des Mischwerkzeuges verläuft. Die Flügelunterseite ist in Rotationsrichtung weisend geneigt. Dieses bedeutet, dass eine gedachte Verlängerung der Flügelunterseite in Rotationsrichtung auf den Mischbehälterboden zuläuft. Ferner sind die Radialflügel über ihre gesamte Erstreckung in Rotationsrichtung (ihrer Querschnittsbreite) dergestalt ausgelegt, dass eine den hinteren Abschluss mit dem jeweiligen vorderen Abschluss verbindende gedachte Gerade gleichsinnig zu der Neigung der Flügelunterseite in dem Abschnitt abnehmender Dicke geneigt ist. Damit befindet sich der vordere Abschluss eines solchen Radialflügels, wenn in eine gemeinsame vertikale Ebene mit dem hinteren Flügelabschluss projiziert, in einem tieferen Höhenniveau als der hintere Radialflügelabschluss. Die Radialflügel verjüngen sich ausgehend von ihrer maximalen Dicke zum hinteren Flügelabschluss hin. Die maximale Dicke im Radialflügelquerschnitt befindet sich vorzugsweise von dem in Rotationsrichtung weisenden vorderen Abschluss der Radialflügel beabstandet.In a mixing machine with such a mixing tool, surprisingly an improved mixing result can be achieved despite the simpler geometry of the cross sections of its radial wings compared to previously known mixing tools of this type. The underside of the radial wings of the mixing tool are more inclined relative to a horizontal line than the upper sides of the wings, specifically in the section of decreasing wing thickness. The horizontal in the context of these statements is a straight line in that plane which runs at right angles to the axis of rotation of the mixing tool. The underside of the wing is inclined pointing in the direction of rotation. This means that an imaginary extension of the underside of the blade in the direction of rotation runs towards the bottom of the mixing container. Furthermore, the radial wings are designed over their entire extent in the direction of rotation (their cross-sectional width) in such a way that an imaginary straight line connecting the rear end with the respective front end is inclined in the same direction as the slope of the underside of the wing in the section of decreasing thickness. Thus, the front end of such a radial wing, when projected in a common vertical plane with the rear wing end, is at a lower level than the rear radial wing end. Starting from their maximum thickness, the radial wings taper towards the rear end of the wing. The maximum thickness in the radial vane cross-section is preferably spaced from the rotationally facing front termination of the radial vanes.

Die Flügeloberseite der Radialflügel ist gleichsinnig zu der Flügelunterseite geneigt. Bei einem solchen Mischwerkzeug wird somit die Flügeloberseite insgesamt und somit diese auch in ihrem Abschnitt zwischen der maximalen Flügeldicke und dem hinteren Flügelabschluss genutzt, um infolge der Rotation der Radialflügel den die Flügeloberseite kontaktierenden Mischgutpartikeln ein nach oben gerichtetes Moment zu verleihen. Eine solche Querschnittsgeometrie lässt sich mit geraden Flügelflächen, deren aneinandergrenzende Kanten durchaus verrundet sein können, ausbilden.The wing top of the radial wing is inclined in the same direction as the wing underside. In such a mixing tool, the upper side of the wing is used as a whole and thus also in its section between the maximum wing thickness and the rear end of the wing in order to impart an upward moment to the mixed material particles contacting the upper side of the wing as a result of the rotation of the radial wings. Such a cross-sectional geometry can be formed with straight wing surfaces, the adjoining edges of which can certainly be rounded.

Eine besonders einfache Radialflügelquerschnittsgeometrie weist einen Radialflügel auf, der hinsichtlich seines Querschnittes spiegelsymmetrisch zu der Ebene, in der sich die den hinteren Abschluss mit dem vorderen Abschluss verbindende Gerade liegt, ausgeführt ist. Die besondere Raumlage der Radialflügel mit ihrer Neigung sorgt auch bei einer solchen geometrisch einfachen Querschnittsauslegung, dass an der Flügelunterseite ein auf die Mischgutpartikel wirkendes, nach oben gerichtetes Moment ausgeübt wird. Überraschend war es festzustellen, dass mit einer solchen relativ einfachen und von einem üblichen Flügelprofil abweichenden Querschnittsgeometrie der Radialflügel infolge der besonderen Ausrichtung derselben in Bezug auf die Bewegung derselben durch das Mischgut sich ein hervorragendes Durchmischungsergebnis einstellt. Man führt diese nicht unmaßgeblich auf die gegenüber einer Horizontalen geneigten Flügelunterseite zurück, wodurch sich der Raum unter der Flügelunterseite zum Rotationsschatten hin vergrößert. In diesem Unterflügelabschnitt und hinter einem solchen Radialflügel konnten besonders effektive Aufwirbelungen beim Mischvorgang beobachtet werden.A particularly simple radial wing cross-section geometry has a radial wing which, in terms of its cross section, is designed to be mirror-symmetrical to the plane in which the straight line connecting the rear end with the front end lies. The special spatial position of the radial blades with their inclination ensures, even with such a geometrically simple cross-sectional design, that an upward moment acting on the mixed material particles is exerted on the underside of the blades. It was surprising to find that with such a relatively simple cross-sectional geometry of the radial blades, which deviates from a conventional blade profile, an excellent mixing result is achieved as a result of the special alignment of the same in relation to the movement of the same through the mixed material. This is attributed not insignificantly to the underside of the wing, which is inclined relative to the horizontal, which increases the space under the underside of the wing towards the rotational shadow. Particularly effective turbulence during the mixing process could be observed in this under-wing section and behind such a radial wing.

Zumindest in dem Abschnitt abnehmender Flügeldicke sind gemäß einem Ausführungsbeispiel bei den Radialflügeln die Flügelunterseiten von ihrer maximalen Dicke zum hinteren Flügelabschluss hin gerade ausgeführt. In einer weiteren Ausgestaltung ist quasi die gesamte Flügelunterseite gerade ausgeführt, also von dem vorderen bis zu dem hinteren Flügelabschluss. Auch die Flügeloberseite kann zumindest in dem Abschnitt abnehmender Dicke gerade ausgeführt sein. Lediglich den Bereich maximaler Dicke wird man typischerweise gerundet ausführen, ebenso wie die in Rotationsrichtung weisende Flügelvorderseite.At least in the section of decreasing wing thickness, according to one exemplary embodiment, the wing undersides of the radial wings are straight from their maximum thickness to the rear wing end. In a further embodiment, virtually the entire underside of the wing is straight, ie from the front to the rear wing end. The upper side of the wing can also be straight, at least in the section of decreasing thickness. Only the area of maximum thickness is typically rounded, as is the front side of the wing pointing in the direction of rotation.

Vorzugsweise ist die Neigung der gedachten Geraden zwischen dem hinteren und dem vorderen Flügelabschluss maximal mit demjenigen Winkel zur Horizontalen geneigt, mit dem die Flügelunterseite in dem Abschnitt zum hinteren Flügelabschluss hin abnehmender Dicke gegenüber der Horizontalen geneigt ist. Die Flügelunterseite weist bei einer solchen Auslegung keine Vertiefungen, wie konkav geformte Abschnitte, auf, was deren Herstellbarkeit vereinfacht.Preferably, the inclination of the imaginary straight line between the rear and the front wing closure is inclined at most with that angle to the horizontal with which the wing underside in the section to rear end of the wing is inclined towards the horizontal with decreasing thickness. With such a design, the underside of the wing does not have any indentations, such as concave sections, which simplifies their manufacturability.

Die Vorderseite der Radialflügel kann gerundet ausgeführt sein, beispielsweise mit einer Rundung mit konstantem Radius. Es versteht sich, dass der Radius auch nicht konstant sein kann. Dann wird man in aller Regel den Radius zwischen dem in Rotationsrichtung weisenden Abschluss eines solchen Radialflügels zur Flügeloberseite hin mit einem größeren Radius auslegen als denjenigen Teil der Rundung, die den vorderen Abschluss des Radialflügels mit der Flügelunterseite verbindet. Durchaus möglich ist es auch, den vorderen Abschluss eines solchen Radialflügels als Kante, vorzugsweise verrundet auszulegen, und zwar durch Zusammenführen der Flügeloberseite mit der Flügelunterseite.The front of the radial vanes can be rounded, for example with a rounding with a constant radius. It goes without saying that the radius can also not be constant. Then, as a rule, the radius between the termination of such a radial wing pointing in the direction of rotation toward the upper side of the wing will be designed with a larger radius than that part of the curve that connects the front termination of the radial wing to the underside of the wing. It is also entirely possible to design the front end of such a radial wing as an edge, preferably rounded, by bringing the upper side of the wing together with the underside of the wing.

Eine Verbesserung der Durchmischungswirkung und auch eine weitere Reduzierung von Wandanbackungen kann erreicht werden, wenn die Radialflügel an ihrem Ende jeweils einen Außenflügel tragen. Dieser weist vorzugsweise dieselbe Querschnittsgeometrie auf, wie die Radialflügel. Bei einer solchen Auslegung der Außenflügel sind diese bezüglich ihrer Querschnittsgeometrie angeordnet, dass diejenige Flügelseite, die bei den Radialflügen die Unterseite ist, bei den Außenflügeln die in radialer Richtung nach außen weisende Flügelseite ist. Die Außenflügelseiten der Außenflügel sind vorzugsweise gegenüber einer die Außenflügelseiten einhüllenden zylindrischen Mantelfläche in derselben Weise angestellt, wie die Flügelunterseite gegenüber einer Horizontalen. Der Anstellungswinkel der Flügelaußenseiten gegenüber der einhüllenden zylindrischen Mantelfläche kann derselbe sein wie der Anstellwinkel der Flügelunterseiten gegenüber einer Horizontalen. Der Anstellwinkel der Flügelaußenseiten gegenüber der einhüllenden zylindrischen Mantelfläche kann sich jedoch auch von der Anstellung der Flügelunterseite gegenüber einer Horizontalen unterscheiden, beispielsweise um einige Winkelgrade kleiner sein.An improvement in the mixing effect and also a further reduction in wall caking can be achieved if the radial vanes each carry an outer vane at their end. This preferably has the same cross-sectional geometry as the radial vanes. With such a design of the outer wings, they are arranged with respect to their cross-sectional geometry such that that wing side which is the underside in the case of radial flights is the wing side pointing outwards in the radial direction in the case of the outer wings. The outer wing sides of the outer wing are preferably positioned in relation to a cylindrical lateral surface enveloping the outer wing sides in the same way as the wing underside is positioned in relation to a horizontal. The angle of attack of the wing outer sides with respect to the enveloping cylindrical lateral surface can be the same as the angle of attack of the wing undersides with respect to a horizontal. However, the angle of attack of the outer sides of the wing relative to the enveloping cylindrical lateral surface can also differ from the inclination of the underside of the wing relative to a horizontal line, for example it can be a few angular degrees smaller.

Die Erfindung ist nachfolgend anhand eines Ausführungsbeispiels unter Bezugnahme auf die beigefügten Figuren beschrieben:

Fig. 1:
Eine perspektivische Ansicht einer industriellen Mischmaschine,
Fig. 2:
eine Unteransicht auf die Unterseite der Kopfplatte des Mischkopfes mit dem von dem Mischkopf getragenen Mischwerkzeug,
Fig. 3:
eine perspektivische Darstellung des Mischwerkzeuges in Alleindarstellung,
Fig. 4:
eine Seitenansicht des Mischwerkzeuges der Figur 3, angeschlossen an die die Kopfplatte des Mischkopfes durchgreifende Antriebswelle,
Fig. 5:
eine vergrößerte Darstellung der Querschnittsgeometrie der Radialflügel des Mischwerkzeuges der Figuren 3 und 4,
Fig. 6:
eine Draufsicht auf die Kopfplatte des Mischkopfes mit einem anderen, auf die Antriebswelle aufgesetzten Mischwerkzeug und
Fig. 7:
eine Seitenansicht entsprechend derjenigen der Figur 4 des auf der Antriebswelle sitzenden Mischwerkzeuges der Figur 6.
The invention is described below using an exemplary embodiment with reference to the accompanying figures:
Figure 1:
A perspective view of an industrial mixing machine,
Figure 2:
a bottom view of the underside of the top plate of the mixing head with the mixing tool carried by the mixing head,
Figure 3:
a perspective view of the mixing tool on its own,
Figure 4:
a side view of the mixing tool of FIG figure 3 , connected to the drive shaft passing through the top plate of the mixing head,
Figure 5:
an enlarged view of the cross-sectional geometry of the radial blades of the mixing tool Figures 3 and 4 ,
Figure 6:
a plan view of the top plate of the mixing head with another mixing tool placed on the drive shaft and
Figure 7:
a side view corresponding to that of figure 4 of the mixing tool sitting on the drive shaft figure 6 .

Eine Mischmaschine 1 dient zum industriellen Mischen von in einem Mischcontainer befindlichem Mischgut, beispielsweise Kunststoffgranulaten. Die Mischmaschine 1 verfügt über ein Gestell 2, welches bei dem dargestellten Ausführungsbeispiel durch zwei Ständer 3, 3.1 bereitgestellt ist. Zwischen den Ständern 3, 3.1 befindet sich im Bereich des Bodens eine Containereinfahrt 4. Die Containereinfahrt 4 ist seitlich in Richtung zu den Ständern 3, 3.1 durch jeweils eine Seitenwand 5, 5.1 begrenzt. In ihrem oberen Abschnitt sind die beiden Ständer 3, 3.1 über eine schwenkbare Baugruppe 6 miteinander verbunden. Die schwenkbare Baugruppe 6 umfasst ein Rahmenbauteil 7, an dessen beide Schmalseiten jeweils eine Schwenkwelle 8 befestigt ist. Die Schwenkwelle 8 ist in den Ständern 3, 3.1 gelagert. In dem Ständer 3 befindet sich ein elektromotorischer Antrieb 9, mit dem die schwenkbare Baugruppe 6 um die Achse ihrer Schwenkwelle 8 verschwenkt werden kann.A mixing machine 1 is used for the industrial mixing of material to be mixed in a mixing container, for example plastic granules. The mixing machine 1 has a frame 2, which in the illustrated embodiment is provided by two stands 3, 3.1. A container entrance 4 is located between the uprights 3, 3.1 in the area of the floor. The container entrance 4 is bounded laterally in the direction of the uprights 3, 3.1 by a respective side wall 5, 5.1. In their upper section, the two stands 3, 3.1 are connected to one another via a pivotable assembly 6. The pivotable assembly 6 comprises a frame component 7, on each of whose two narrow sides there is a pivot shaft 8 is attached. The pivot shaft 8 is mounted in the stands 3, 3.1. In the stand 3 there is an electric motor drive 9 with which the pivotable assembly 6 can be pivoted about the axis of its pivot shaft 8 .

Teil der schwenkbaren Baugruppe 6 sind zwei als Spindelhübe ausgeführte Hubeinrichtungen 10, 10.1. Die Hubeinrichtungen 10, 10.1 sind gleich aufgebaut. Nachfolgend ist die Hubeinrichtung 10 von ihrem prinzipiellen Aufbau her beschrieben. Diese Ausführungen gelten gleichermaßen für die Hubeinrichtung 10.1. Die Hubeinrichtung 10 verfügt über eine Hubplatte 11 als Teil einer durch eine Spindel 12 in vertikaler Richtung verfahrbaren Hubplatteneinheit. Auf der Hubplatte befindet sich eine weitere Platte, die zum Containerflansch hin eine Fase besitzt. Dadurch wird der Container beim Anheben zentriert. Die Hubplatteneinheit ist an einer Führung 13 geführt. Angetrieben ist die Spindel 12 durch einen Elektromotor. Mittels der Spindel 12 kann die Hubplatteneinheit in vertikaler Richtung verstellt werden. In Figur 1 ist diese in ihrer untersten Position gezeigt. Teil der Hubplatteneinheit ist des Weiteren ein Arretierungshebel 14, der um eine vertikale Schwenkachse aus seiner in Figur 1 gezeigten Grundstellung in Richtung der Mischcontaineraufnahme verschwenkt werden kann. Die Verschwenkung des Arretierhebels 14 dient zum Verriegeln eines in die Containereinfahrt 4 eingefahrenen Mischcontainers. Der Arretierungshebel 4 wirkt gegen die Außenwandung eines solchen Mischcontainers. Die Hubeinrichtung 10 ist mittels eines Elektromotors 15 als Teil der schwenkbaren Baugruppe 6 in Richtung der Längserstreckung der Schwenkachse der schwenkbaren Baugruppe 6 verfahrbar. Der Elektromotor 15 treibt zu diesem Zweck jeweils einen Spindelantrieb an.Part of the pivotable assembly 6 are two lifting devices 10, 10.1 designed as spindle lifts. The lifting devices 10, 10.1 have the same structure. The basic structure of the lifting device 10 is described below. These statements apply equally to the lifting device 10.1. The lifting device 10 has a lifting plate 11 as part of a lifting plate unit that can be moved in the vertical direction by a spindle 12 . There is another plate on the lifting plate, which has a chamfer towards the container flange. This will center the container when lifting. The lifting plate unit is guided on a guide 13. The spindle 12 is driven by an electric motor. The lifting plate unit can be adjusted in the vertical direction by means of the spindle 12 . In figure 1 it is shown in its lowest position. Part of the lifting plate unit is also a locking lever 14, which is about a vertical pivot axis from its in figure 1 basic position shown can be pivoted in the direction of the mixing container recording. The pivoting of the locking lever 14 serves to lock a mixing container that has been driven into the container entrance 4 . The locking lever 4 acts against the outer wall of such a mixing container. The lifting device 10 can be moved in the direction of the longitudinal extent of the pivot axis of the pivotable assembly 6 by means of an electric motor 15 as part of the pivotable assembly 6 . For this purpose, the electric motor 15 drives a respective spindle drive.

Die schwenkbare Baugruppe umfasst des Weiteren einen Mischkopf, von dem in Figur 1 seine Oberseite (Außenseite) erkennbar ist.The pivoting assembly also includes a mixing head, from which figure 1 its top (outside) is visible.

Der Mischkopf 16 mit den beiden Hubeinrichtungen 10, 10.1 ist innerhalb des Rahmenbauteils 7 kardanisch aufgehängt. Mittels eines Schwenkantriebes S kann der Mischkopf 16 mit seinen beiden Hubeinrichtungen 10, 10.1 um eine quer zur Schwenkachse des Rahmenbauteils 7 verlaufende Drehachse verschwenkt werden. Infolge dessen kann der Mischkopf 16 um zwei rechtwinklig zueinander stehende Achsen bei einem Betrieb der Mischmaschine 1 verschwenkt werden. Dieses erlaubt die Durchführung eines Mischprozesses, bei dem ein an den Mischkopf 16 angeschlossener Mischcontainer eine mehrdimensionale Pendelbewegung ausführt.The mixing head 16 with the two lifting devices 10, 10.1 is cardanically suspended within the frame component 7. By means of a pivoting drive S, the mixing head 16 with its two lifting devices 10, 10.1 can be pivoted about an axis of rotation running transversely to the pivoting axis of the frame component 7. As a result, the mixing head can be 16 µm two axes standing at right angles to one another can be pivoted when the mixing machine 1 is in operation. This allows a mixing process to be carried out in which a mixing container connected to the mixing head 16 performs a multi-dimensional oscillating movement.

Teil des Mischkopfes 16 ist eine einen Boden zum Mischbehälterinneren bildende Kopfplatte 17. Eine Antriebswelle 18 durchgreift die Kopfplatte 17 und ist von einem Elektromotor 19 angetrieben (s. Figur 2). Auf der Antriebswelle 18 sitzt mit Abstand zu der den Boden bildenden Oberseite der Kopfplatte 17 ein Mischwerkzeug 19. Bei dem Mischwerkzeug 19 handelt es sich um ein Flügelwerkzeug, welches drei Radialflügel 20, 20.1, 20.2 trägt. Die Radialflügel 20, 20.1, 20.2 sind mit gleichem Winkelabstand zueinander an die Nabe 21 des Mischwerkzeuges 19 angeschlossen. Die Radialflügel 20, 20.1, 20.2 sind alle identisch aufgebaut. Jeder Radialflügel 20, 20.1, 20.2 trägt an seinem radial äußeren Abschluss einen Außenflügel 22, 22.1, 22.2, angeschlossen jeweils an die Flügeloberseite. Der Anschluss der Außenflügel 22, 22.1, 22.2 ist in den Figuren schematisch dargestellt. In der Praxis wird man den Radialflügel jeweils durchgehend mit einem leichten Radius zwischen den beiden Flügelpartien ausführen.Part of the mixing head 16 is a top plate 17 that forms a base to the interior of the mixing container. A drive shaft 18 extends through the top plate 17 and is driven by an electric motor 19 (see Fig. figure 2 ). A mixing tool 19 sits on the drive shaft 18 at a distance from the upper side of the head plate 17 forming the base. The mixing tool 19 is a wing tool which carries three radial wings 20, 20.1, 20.2. The radial vanes 20, 20.1, 20.2 are connected to the hub 21 of the mixing tool 19 at the same angular distance from one another. The radial wings 20, 20.1, 20.2 are all constructed identically. Each radial wing 20, 20.1, 20.2 carries an outer wing 22, 22.1, 22.2 at its radially outer end, each connected to the upper side of the wing. The connection of the outer wings 22, 22.1, 22.2 is shown schematically in the figures. In practice, the radial wing will always be designed with a slight radius between the two wing sections.

In Figur 2 ist die innere Mantelfläche 23 eines an den Mischkopf 16 angeschlossenen, im Übrigen nicht näher dargestellten Mischcontainers gezeigt. Dieses dient zur Visualisierung des radial äußeren Abstandes der Außenflügel 22, 22.1, 22.2 von der durch die Mantelfläche wiedergegebenen Innenseite eines Mischcontainers.In figure 2 the inner lateral surface 23 of a mixing container connected to the mixing head 16 and otherwise not shown in detail is shown. This is used to visualize the radially outer distance of the outer wings 22, 22.1, 22.2 from the inside of a mixing container, which is represented by the lateral surface.

Figur 3 zeigt das Mischwerkzeug 19 in einer perspektivische Ansicht in Alleindarstellung. Aus dieser Darstellung wird bereits die Querschnittsgeometrie der Radialflügel 20, 20.1, 20.2 deutlich. Diese ist nachstehend unter Bezugnahme auf die Figuren 4 und 5 anhand des Radialflügels 20 erläutert. Der Radialflügel 20 - Gleiches gilt auch für die beiden weiteren Radialflügel 20.1, 20.2 - weisen eine entgegen der Drehrichtung weisende keilförmige Querschnittsgeometrie mit gerundeter, in Rotationsrichtung weisender Stirnfläche auf. Die Rotationsrichtung des Mischwerkzeuges 19 ist in diesen Figuren mit einem Blockpfeil kenntlich gemacht. figure 3 shows the mixing tool 19 in a perspective view on its own. The cross-sectional geometry of the radial vanes 20, 20.1, 20.2 is already clear from this illustration. This is below with reference to the Figures 4 and 5 explained with reference to the radial vane 20. The radial vane 20--the same also applies to the two other radial vanes 20.1, 20.2--have a wedge-shaped cross-sectional geometry pointing counter to the direction of rotation with a rounded end face pointing in the direction of rotation. The direction of rotation of the mixing tool 19 is indicated in these figures with a block arrow.

Figur 5 zeigt das Querschnittsprofil des Radialflügels 20 in einer vergrößerten Darstellung, und zwar ohne den endseitig darauf angeformten Außenflügel 22. Der Radialflügel 20 ist gegenüber einer Horizontalen H angestellt, und zwar mit einer Neigungsrichtung in Richtung zur Kopfplatte 17 des Mischkopfes 16 in Rotationsrichtung. Diese befindet sich in der Darstellung in der horizontalen Ebene. Diese Ebene ist auch unabhängig der aktuellen Raumlage der Kopfplatte diejenige Ebene, die rechtwinklig zur Rotationsachse des Mischwerkzeuges 19 aufgespannt ist. In der in den Figuren gezeigten Raumlage der Querschnittsgeometrie des Radialflügels 20 schließt die gerade und somit ohne zusätzliche Konturen ausgeführte Flügelunterseite 24 mit der Horizontalen H einen Winkel α von etwa 25° ein. Die Flügeloberseite 25 ist ebenfalls gerade ausgeführt und bei dem dargestellten Ausführungsbeispiel gleichsinnig zu der Flügelunterseite 24 geneigt, allerdings nur um wenige Grade. Die Neigung der Flügeloberseite 25 ist auch in der Darstellung der Figur 4 des Mischwerkzeuges 19 an dem Radialflügel 20.2 erkennbar, in welcher Ansicht der Radialflügel 20.2 von seiner Vorderseite her gezeigt und in dieser Perspektive die aufgrund ihrer Neigung ansteigende Flügeloberseite sichtbar ist. Die Flügelunterseite 24 und die Flügeloberseite 25 stellen mit ihren geraden Abschnitten denjenigen Abschnitt des Radialflügels 20 dar, dessen Dicke in Richtung zum hinteren Flügelabschluss 26 hin von seiner maximalen Dicke abnimmt. figure 5 shows the cross-sectional profile of the radial wing 20 in an enlarged view, without the outer wing 22 formed on the end. In the illustration, this is in the horizontal plane. Regardless of the current spatial position of the top plate, this plane is the plane that is perpendicular to the axis of rotation of the mixing tool 19 . In the spatial position of the cross-sectional geometry of the radial wing 20 shown in the figures, the underside 24 of the wing, which is straight and thus designed without additional contours, encloses an angle α of approximately 25° with the horizontal H. The top side 25 of the wing is also straight and, in the illustrated embodiment, is inclined in the same direction as the bottom side 24 of the wing, but only by a few degrees. The inclination of the wing top 25 is also in the representation figure 4 of the mixing tool 19 can be seen on the radial wing 20.2, in which view the radial wing 20.2 is shown from its front side and in this perspective the upper side of the wing, which rises due to its inclination, is visible. The underside of the wing 24 and the top of the wing 25 with their straight sections represent that section of the radial wing 20 whose thickness decreases from its maximum thickness in the direction of the rear wing end 26 .

Aufgrund der beschriebenen Anstellung befindet sich der durch das Flügelende 26 bereitgestellte rückseitige Abschluss des Radialflügels 20 in Bezug auf eine Vertikale auf einem höheren Niveau als der in Rotationsrichtung weisende vordere Abschluss des geraden Abschnittes der Flügeloberseite 25. Die ohne zusätzliche Konturen gerade ausgeführte Flügelunterseite 24 und Flügeloberseite 25 sind aufgrund ihrer unterschiedlichen Neigung am Flügelende 26 zusammengeführt. Die Flügelunterseite 24 schließt mit der Flügeloberseite 25 einen Winkel β von etwa 20° ein. In Rotationsrichtung weisend ist die Stirn 27 des Radialflügels 20 gerundet ausgeführt, und zwar bei dem dargestellten Ausführungsbeispiel mit gleichbleibendem Krümmungsradius. Wesentlich bei der Gestaltung der Querschnittsgeometrie des Radialflügels 20 ist, dass eine das Flügelende 26 mit dem in Rotationsrichtung weisenden stirnseitigen Flügelabschluss verbindende Gerade G gleichsinnig zu der Neigung der Flügelunterseite 24 geneigt ist. Bei dem dargestellten Ausführungsbeispiel ist die Neigung dieser Geraden G mit etwa 12° um etwa die Hälfte geringer als die Neigung der Flügelunterseite 24 gegenüber der Horizontalen H. Der Radialflügel 20 ist in Bezug auf diejenige Ebene, in der sich die Gerade G befindet, spiegelsymmetrisch aufgebaut. Die Ebene, in der sich die Gerade G befindet, ist die Mittellängsebene des Radialflügels 20.Due to the described position, the rear termination of the radial wing 20 provided by the wing end 26 is at a higher level in relation to a vertical than the front termination of the straight section of the wing top 25 pointing in the direction of rotation. The wing bottom 24 and wing top, which are straight without additional contours 25 are brought together at the end of the wing 26 due to their different inclination. The underside 24 of the wing encloses an angle β of about 20° with the top side 25 of the wing. Pointing in the direction of rotation, the end face 27 of the radial wing 20 is rounded, specifically with a constant radius of curvature in the exemplary embodiment shown. What is essential in the design of the cross-sectional geometry of the radial wing 20 is that a straight line G connecting the wing end 26 to the front wing end pointing in the direction of rotation is inclined in the same direction as the slope of the underside 24 of the wing. In which In the exemplary embodiment shown, the inclination of this straight line G is about 12° less than the inclination of the underside of the wing 24 relative to the horizontal H. The radial wing 20 is constructed mirror-symmetrically with respect to the plane in which the straight line G is located. The plane in which the straight line G is located is the median longitudinal plane of the radial wing 20.

Bei einer Rotation des Mischwerkzeuges 19 in der in den Figuren gezeigten Drehrichtung wird über die gekrümmte Stirn 27 oberhalb ihres Scheitels auftreffendes Mischgut in vertikaler Richtung nach oben zur Flügeloberseite 25 geleitet. Hierdurch erhält das Mischgut ein in vertikaler Richtung nach oben gerichtetes Moment, was durch die in Rotationsrichtung geneigte Anstellung der Flügeloberseite 25 unterstützt wird. Durch diese wird das Mischgut, durch das der Radialflügel 20 bewegt wird, schaufelartig in vertikaler Richtung nach oben angehoben bzw. von dem Radialflügel 26 weggeschleudert. Zugleich wird aufgrund der gerundeten Stirn 27 unterhalb ihres in Rotationsrichtung weisenden Scheitels befindliches Mischgut in vertikaler Richtung zur Kopfplatte 17 bewegt. Allerdings bewirkt die Anstellung der Flügelunterseite 24 vor dem Hintergrund des durch den Radialflügel 20 verdrängten Mischgutes in dem sich zum Flügelende 26 hin vergrößernden Raum unterhalb des Radialflügels einen gewissen Unterdruck, durch den unterhalb der Flügelunterseite 24 des Radialflügels 20 befindliches Mischgut nach oben gerissen wird und von dem nachfolgenden Radialflügel 20.2 erfasst und über seine Flügeloberseite ein weiteres, die Mischgutpartikel in vertikaler Richtung nach oben förderndes Moment erhalten. Diese besondere Wirkungsweise begründet die intensive Durchmischung von mit dem Mischwerkzeug 19 gemischten Mischgut.When the mixing tool 19 rotates in the direction of rotation shown in the figures, mixed material that hits the curved end 27 above its apex is guided in a vertical direction upwards to the upper side 25 of the blade. As a result, the material to be mixed receives a moment directed upwards in the vertical direction, which is supported by the inclination of the upper side 25 of the blades in the direction of rotation. Through this, the material to be mixed, through which the radial wing 20 is moved, is lifted up like a shovel in the vertical direction or thrown away from the radial wing 26 . At the same time, due to the rounded end face 27 , material to be mixed located below its apex pointing in the direction of rotation is moved in the vertical direction toward the top plate 17 . However, the adjustment of the underside of the wing 24 against the background of the mixed material displaced by the radial wing 20 causes a certain negative pressure in the space below the radial wing, which enlarges towards the end 26 of the wing, through which the mixed material located below the underside of the wing 24 of the radial wing 20 is torn upwards and from the subsequent radial wing 20.2 and, via its wing upper side, receive a further moment that conveys the mixed material particles upwards in a vertical direction. This special mode of operation is the reason for the intensive thorough mixing of the mixed material mixed with the mixing tool 19 .

Der Außenflügel 22 am Radialflügel 20 zeigt dieselbe Querschnittsgeometrie wie der Radialflügel 20 und in Bezug auf die Mantelfläche 23 eines Mischcontainers dieselbe Flügelanstellung. Wie aus der Draufsicht der Figur 2 erkennbar, ist die in radialer Richtung nach außen weisende Flügelseite 28 ebenso gegenüber der Mantelfläche 23 angestellt, wie die Flügelunterseite 24 gegenüber der Horizontalen H. Der Anstellungswinkel der Flügelseite 28 des Außenflügels 22 mit der Mantelfläche 23 ist bei dem dargestellten Ausführungsbeispiel um wenige Winkelgrade kleiner als der Anstellungswinkel α der Flügelunterseite 24 gegenüber der Horizontalen H.The outer wing 22 on the radial wing 20 shows the same cross-sectional geometry as the radial wing 20 and in relation to the lateral surface 23 of a mixing container the same wing setting. As can be seen from the top view of FIG. 2, the wing side 28 pointing outwards in the radial direction is also set in relation to the lateral surface 23, as is the wing underside 24 in relation to the horizontal H. The angle of the wing side 28 of the outer wing 22 with the lateral surface 23 is a few angular degrees smaller in the illustrated embodiment than the angle of incidence α of the underside 24 of the wing relative to the horizontal H.

Figur 6 zeigt ein weiteres Mischwerkzeug 19.1, welches prinzipiell aufgebaut ist, wie das Mischwerkzeug 19 der vorstehenden Figuren. Das Mischwerkzeug 19.1 unterscheidet sich in der konkreten Querschnittsgeometrie seiner Radialflügel 29, 29.1, 29.2 von denjenigen des Mischwerkzeuges 19. Die Querschnittsgeometrie dieser Radialflügel 29, 29.1, 29.2 ist anschaulicher in der Seitenansicht des Mischwerkzeuges 19.1 der Figur 7 erkennbar. Die Querschnittsgeometrie des Radialflügels 29 - Gleiches gilt auch für die beiden anderen Radialflügel 29.1, 29.2 - unterscheidet sich von derjenigen des Radialflügels 20 dadurch, dass die Flügelunterseite 30 insgesamt gerade ausgeführt ist und die Flügelunterseite 30 somit der gedachten Geraden entspricht, die das Flügelende mit dem vorderen Abschluss verbindet. Die Flügeloberseite 31 weist einen geraden hinteren Abschnitt auf, durch den der Abschnitt abnehmender Dicke ausgehend von der maximalen Dicke des Radialflügels 29 definiert ist. Dieser Radialflügel 29 hat seine größte Dicke (Abstand von Flügelunterseite 30) zur Flügeloberseite 31 gegenüber dem Radialflügel 20 etwas weiter von seinem vorderen Abschluss zurückversetzt. An dieser Stelle ist die Flügeloberseite 31 unter Ausbildung eines Scheitels gerundet ausgeführt und vorderseitig an die Flügelunterseite 30 unter Ausbildung einer Kante herangeführt. figure 6 shows another mixing tool 19.1, which is constructed in principle like the mixing tool 19 of the preceding figures. The mixing tool 19.1 differs from that of the mixing tool 19 in the specific cross-sectional geometry of its radial wings 29, 29.1, 29.2 figure 7 recognizable. The cross-sectional geometry of the radial wing 29 - the same also applies to the other two radial wing 29.1, 29.2 - differs from that of the radial wing 20 in that the underside of the wing 30 is generally straight and the underside of the wing 30 thus corresponds to the imaginary straight line connecting the end of the wing with the front end connects. The wing top 31 has a straight rear section which defines the section of decreasing thickness starting from the maximum thickness of the radial wing 29 . This radial wing 29 has its greatest thickness (distance from the underside 30 of the wing) to the wing top 31 compared to the radial wing 20 somewhat further back from its front end. At this point, the upper side 31 of the wing is rounded to form an apex and is brought up to the lower side 30 of the wing at the front, forming an edge.

Bei einer Rotation des Mischwerkzeuges 19.1 wird von dem Radialflügel 29 Mischgut ausschließlich nach oben und somit von der Kopfplatte 17 weg gefördert. Bei diesem Mischwerkzeug 19.1 wird bei einem Betrieb mehr Mischgut, welches von dem Radialflügel 29 nicht erfasst wird und sich in Richtung zur Kopfplatte 17 unterhalb seiner Bewegungsbahn befindet, aufgewirbelt, da von dem Radialflügel 29 im Unterschied zu dem Radialflügel 20 keine Mischgutanteile von diesem in Richtung zur Kopfplatte 17 hin verdrängt werden.When the mixing tool 19.1 rotates, the material to be mixed is conveyed exclusively upwards and thus away from the top plate 17 by the radial vane 29. With this mixing tool 19.1, more mixed material that is not caught by the radial wing 29 and is located below its path of movement in the direction of the head plate 17 is whirled up during operation, since the radial wing 29, in contrast to the radial wing 20, does not produce any parts of the mixed material in the direction be displaced towards the top plate 17.

Die Erfindung ist anhand von Ausführungsbeispielen beschrieben worden. Ohne den Umfang der geltenden Ansprüche zu verlassen, ergeben sich für einen Fachmann weitere Möglichkeiten, die Erfindung umzusetzen, ohne dass dieses im Rahmen dieser Ausführungen näher erläutert werden müsste. Bezugszeichenliste 1 Mischmaschine 31 Flügeloberseite 2 Gestell 3, 3.1 Ständer G Gerade 4 Containereinfahrt H Horizontale 5, 5.1 Seitenwand S Schwenkantrieb 6 schwenkbare Baugruppe α Winkel 7 Rahmenbauteil β Winkel 8 Schwenkachse 9 Antriebseinheit 10, 10.1 Hubeinrichtung 11 Hubplatte 12 Spindel 13 Führung 14 Arretierungshebel 15 Elektromotor 16 Mischkopf 17 Kopfplatte 18 Antriebswelle 19 Elektromotor 20, 20.1, 20.2 Radialflügel 21 Nabe 22, 22.1, 22.2 Außenflügel 23 Mantelfläche 24 Flügelunterseite 25 Flügeloberseite 26 Flügelende 27 Stirn 28 Flügelseite 29, 29.1, 29.2 Radialflügel 30 Flügelunterseite The invention has been described using exemplary embodiments. Without departing from the scope of the applicable claims, there are further possibilities for a person skilled in the art to implement the invention without that this would have to be explained in more detail in the context of these statements. <b>Reference List</b> 1 blender 31 wing top 2 frame 3, 3.1 stand G Just 4 container entrance H horizontal 5, 5.1 Side wall S slewing drive 6 pivoting assembly a angle 7 frame component β angle 8th pivot axis 9 drive unit 10, 10.1 lifting device 11 lifting plate 12 spindle 13 guide 14 locking lever 15 electric motor 16 mixing head 17 headstock 18 drive shaft 19 electric motor 20, 20.1, 20.2 radial vane 21 hub 22, 22.1, 22.2 outer wing 23 lateral surface 24 wing underside 25 wing top 26 wing tip 27 Forehead 28 wing side 29, 29.1, 29.2 radial vane 30 wing underside

Claims (15)

  1. Industrial mixing machine, comprising a mixing head (16), a frame (2), and at least one connecting means for connecting a mixing container, containing a mixing material and open on the connection side, to the mixing head (16) for the purpose of forming a closed mixing container, said mixing head (16), as part of a component group or module (6) which can be pivoted in relation to the frame (2), is mounted in such a way that the closed mixing container, formed from the mixing head (6) and mixing container, can be pivoted in relation to the frame (2) in order to carry out the mixing process, and said mixing head (16) comprises at least one mixing tool (19, 19.1), located on a drive shaft (18) which engages through the base of the mixing head (16) and driven rotationally by this drive shaft, with several radial wings (20, 20.1, 20.2; 29, 29.1, 29.2), said radial wings (20, 20.1, 20.2; 29, 29.1, 29.2) exhibiting a cross-section geometry wherein, starting from its maximum thickness, the wing thickness decreases in the direction of rotation towards the rear wing end (26), wherein, in the section of decreasing wing thickness, the under side of the wing (24, 30) is configured as stronger in the direction of rotation to the horizontal (H) than the upper side of the wing (25, 31), and wherein an imaginary straight line (G), connecting the rear termination (26) of the radial wing (20, 20.1, 20.2; 29, 29.1, 29.2) with its respective front termination pointing in the direction of rotation, is inclined in the same direction as the inclination of the under side of the wing (24, 30) in the section of decreasing thickness in relation to the horizontal (H), characterised in that the upper side of the wing (25, 31) of the radial wing (20, 20.1, 20.2; 29, 29.1, 29.2) is inclined in the same direction to the under side of the wing (24, 30).
  2. Mixing machine according to claim 1, characterised in that, at least in the section of decreasing wing thickness, the wing under side (24, 30) is configured as straight.
  3. Mixing machine according to claim 2, characterised in that, at least to the greatest possible extent, the entire wing under side (30) is configured as straight.
  4. Mixing machine according to any one of claims 1 to 3, characterised in that, at least to a great extent, the wing upper side (25, 31) is configured as straight in the section of decreasing thickness.
  5. Mixing machine according to any one of claims 1 to 4, characterised in that the radial wings are configured in cross-section as mirror-symmetrical to the imaginary straight line (G).
  6. Mixing machine according to any one of claims 1 to 5, characterised in that the inclination of the imaginary straight line (G) between the respective rear and respective front wing termination of the radial wings (20, 20.1, 20.2; 29, 29.1, 29.2) is inclined at the maximum at that angle at which the wing under side (24, 31) is inclined to the horizontal (H) in the section of decreasing thickness.
  7. Mixing machine according to any one of claims 1 to 6, characterised in that the front side of the radial wings (20, 20.1, 20.2), pointing in the direction of rotation, is configured as rounded.
  8. Mixing machine according to claim 7, characterised in that the rounding on the wing front sides of the radial wings (20, 20.1, 20.2) is configured with a constant radius.
  9. Mixing machine according to claim 8, characterised in that it is in the rounding ends that the radial wings (20, 20.1, 20.2) exhibit their maximum thickness.
  10. Mixing machine according to any one of claims 1 to 6, characterised in that the front termination of the radial wings (29, 29.1, 29.2), facing in the direction of rotation, is formed by an edge which merges the wing upper side (31) and the wing under side (30).
  11. Mixing machine according to any one of claims 1 to 6, characterised in that the mixing tool (19, 19.1) comprises three radial wings (20, 20.1, 20.2; 29, 29.1, 29.2).
  12. Mixing machine according to any one of claims 1 to 11, characterised in that the ends of the radial wings (20, 20.1, 20.2; 29, 29.1, 29.2) carry on their upper side an outer wing (22, 22.1, 22.2).
  13. Mixing machine according to claim 12, characterised in that the front termination of the outer wing (22, 22.1, 22.2), extending away from the upper side of the radial wings, is inclined against the direction of rotation of the mixing tool (19, 19.1).
  14. Mixing machine according to claim 12 or 13, characterised in that the cross-section geometry of the outer wings (22, 22.1, 22.2) corresponds to that of the radial wings (20, 20.1, 20.2; 29, 29.1, 29.2), wherein that wing side, which is the under side (24, 30) in respect of the radial wings (20, 20.1, 20.2; 29, 29.1, 29.2), is, in respect of the outer wings (22, 22.1, 22.2), the wing side (28) which in the radial direction points outwards, and this is configured in the same way in relation to a cylindrical casing surface, which encloses the outer wing outer sides, as the under sides of the radial wings (20, 20.1, 20.2; 29, 29.1, 29.2) in relation to a horizontal (H).
  15. Mixing machine according to claim 14, characterised in that the configuration angle of the outer wing outer sides is smaller in relation to the cylindrical casing surface enclosing the outer wing outer sides than that with which the under sides (24, 30) of the radial wings (20, 20.1, 20.2; 29, 29.1, 29.2) are inclined in relation to the horizontal.
EP20193532.7A 2019-09-04 2020-08-31 Industrial mixing machine Active EP3789108B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202019104870.0U DE202019104870U1 (en) 2019-09-04 2019-09-04 mixer

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EP3789108A1 EP3789108A1 (en) 2021-03-10
EP3789108B1 true EP3789108B1 (en) 2022-09-21

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EP20193532.7A Active EP3789108B1 (en) 2019-09-04 2020-08-31 Industrial mixing machine

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US (1) US20210060504A1 (en)
EP (1) EP3789108B1 (en)
DE (1) DE202019104870U1 (en)
ES (1) ES2931203T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202019104870U1 (en) * 2019-09-04 2019-09-18 Dr. Herfeld Gmbh & Co. Kg mixer
CN115487731A (en) * 2022-09-20 2022-12-20 浙江绍兴福元科技有限公司 Dye broken wall dissolving device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1361011A (en) * 1963-06-21 1964-05-15 Huels Chemische Werke Ag Method and device for agglomerating powdered thermoplastic synthetic substances
DE3543913A1 (en) 1985-12-12 1987-06-19 Herfeld Friedrich W MIXING DEVICE
DE202009001937U1 (en) * 2009-03-04 2009-04-30 Mixaco Dr. Herfeld Gmbh & Co. Kg mixer
DE202013103591U1 (en) * 2013-08-09 2013-08-27 Dr. Herfeld Gmbh & Co Kg Inliner for lining a mixed container and arrangement comprising a mixing container and an inliner inserted therein
DE202014101787U1 (en) * 2014-04-15 2014-04-30 Dr. Herfeld Gmbh & Co. Kg mixer
DE202015103284U1 (en) * 2015-06-23 2016-09-26 Dr. Herfeld Gmbh & Co Kg Blender and inliner for it
DE202016107397U1 (en) 2016-12-27 2018-03-28 Zeppelin Systems Gmbh Mixing tool for a mixer and mixer
US11224848B2 (en) * 2018-02-20 2022-01-18 Dr. Herfeld Gmbh & Co. Kg Mixing machine
ES2899452T3 (en) * 2018-02-20 2022-03-11 Dr Herfeld Gmbh & Co Kg mixing machine
DE202019104870U1 (en) * 2019-09-04 2019-09-18 Dr. Herfeld Gmbh & Co. Kg mixer

Also Published As

Publication number Publication date
EP3789108A1 (en) 2021-03-10
ES2931203T3 (en) 2022-12-27
US20210060504A1 (en) 2021-03-04
DE202019104870U1 (en) 2019-09-18

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