EP2460581A1 - Method for mixing powder or granular materials, and mixing machine - Google Patents

Abstract

The mixing machine (1) has a mixing head (3) with a motor driven tool and a head that is supported to move opposite to a frame (2). The tool has a base clearing tool driven at low speed for moving the mixing material in a radial direction away from the shaft of the tool. The redistribution of the mixing material particles in a direction parallel to the rotational axis of the tool is effected. The tool has a blade overhanging in the transition section between a base and wall section of a container part.

Description

The invention relates to a method for mixing powdered and / or granular materials with a mixing machine, comprising a mixing head, configured with one or more elements for connecting the same to a container containing a mix for forming a mixing mixture containing closed mixing container, which mixing head pivotable is mounted relative to a frame in such a way that the mixing container formed from the mixing container and container can be pivoted to perform the mixing process, and comprising means for generating a Mischgutstromes and at least one engaging in the Mischgutstrom, rotationally driven mixing tool. Furthermore, the invention relates to a mixing machine, comprising a mixing head, designed with one or more elements for connecting it to a mixture containing a container for forming a mixture containing the closed mixing container, which mixing head is pivotally mounted relative to a frame in such a way that from the mixing head and Container formed mixing container for performing the mixing process is pivotable, and comprising means for generating a Mischgutstromes and at least one engaging in the Mischgutstrom rotationally driven mixing tool.

Such mixing machines are industrial mixers which are used for mixing, in particular, bulk material, typically powdered bulk material, such as is required for producing plastic granulate mixtures or else in the paint industry. These mixing machines have a comparison with a frame pivotally mounted mixing head, which also serves to seal a container containing the mix, which is connected to the mixing head for the purpose of mixing therein. After the container has been connected to the mixing head, a closed mixing container is formed from the mixing head and the container containing the mix. For the purpose of connecting the container At the mixing head, the mixing head has one or more connection elements, for example a peripheral flange. Due to the fact that in these mixing machines a container containing the mix is connected to the mixing head, these mixers are also addressed as a container mixer. The mixing head itself is pivotally arranged relative to the frame of the mixing machine, so that the mixing with respect to the mixing head in an overhead position, in which the mixing head at the bottom and the container connected thereto are located at the top.

Such known container mixers have a device for generating a Mischgutstroms. As Mischgutstromerzeugungseinrichtung used in conventional mixers axially mounted in the mixing head tool, driven by rotation motor. Such a tool has a plurality of radially projecting from the drive shaft wings, so that it is designed in the manner of a propeller. Such a container mixer is off EP 0 225 495 A2 known. Further, it can be provided to arrange a plurality of such tools on the drive shaft. In the prior art mixers, this tool serves as a mixing tool and generates a Mischthrombus during operation of the mixer with the mix contained in the mixing container. By mixing or mixing the mix is thrown upwards in an axial region, deflected outwardly in the radial direction and then due to gravity back to the inner wall of the container to the tools. By the mixing tools described above, thus a Mischgutstrom is generated, in which the entire, located in the mixing vessel mix is included. Due to the acceleration of the mixed material on the one or more mixing tools and the turbulence contained in the Mischgutstrom the mixing process takes place.

In applications where more energy is to be introduced into the mix in addition to the mixing tools, a second motor-driven mixing tool is arranged radially engaging in the wall portion of the container. This tool is a significantly higher speed rotating tool compared to the rotational speed of the tool used to create the mixing turret. It can be provided that several such are provided radially arranged mixing tools. The at least one mixing tool is used for further energy input into the mixing thrombus generated by the conveying tool and for improving a particle dispersion and thus for supporting the mixing process. In the design of such mixing machines, the formation of the high-energy mixed thrombus is imperative for the mixing process. In these previously known mixing machines, the particles are conveyed in the mixing thrombus depending on the mix at a speed in the range of about 20 m / sec.

In industrial mixing machines, the aim is to achieve the desired mixing in the shortest possible time. Even if with higher tool speeds basically a thorough mixing in a shorter time is possible, as with slower rotating tools is generally considered that in the material to be mixed not too much heat may be entered. Especially when mixing plastic granules is to pay attention to this, otherwise the individual granules particles baked together and / or can also cake on the tools. For this reason, in the mixing machines described above, the mixing time is limited in order to prevent the mixed material from being too much heated by the drive of the first and second mixing tools as well as the jacket friction of the particles on the inner wall of the container.

Based on this discussed prior art, the invention is therefore the object of an initially mentioned method and a mixing machine mentioned above to improve such that not only by a lower temperature input a gentler mixing is possible, but also that the mixing process is better controlled.

This procedural object is achieved according to the invention by an initially mentioned, generic method by means of Mischgutstromerzeugungseinrichtung a low-energy Primärmischgutstrom as a flow for supplying the mixed material contained in the mixing container to the at least one mixing tool is generated by which mixing tool a only a fraction of the mixing container located mixed mixture detecting, but responsible for the actual mixing process SekundärMischgutstrom is generated as a cross-flow to serving as a flow primary Mischgutstrom.

The device-related object is achieved by an aforementioned generic mixing machine, wherein the Mischgutstromerzeugungseinrichtung for generating a low-energy Primärmischgutstroms arranged as a flow for supplying the mixed material contained in the mixing container to the at least one in the mixing head in the primary mixed material flow generated by the Mischgutstromerzeugungseinrichtung intervening Mixing tool is designed and that the at least one mixing tool for generating a comprehensive only a fraction of the mixed material contained in the mixing container secondary stream of secondary material is provided as a cross-flow to the Primärärmischgutstrom.

In this method - the same applies to the claimed mixing machine - is produced with the Mischgutstromzeugungseinrichtung only a flow, which is referred to in the context of these remarks as Primärärmischgutstrom. In this Primischischgutstrom the entire, located in the mixing vessel mix is detected. This Mischgutstrom serves to supply the mixed material to one or more mixing tools, each generating a designed as a cross-flow to the flow secondary Mischgutstrom. Of the at least one mixing tool only a fraction of the mixing material detected in the mixing container is detected. This at least one Sekundärhmischgutstrom is responsible for the actual process of mixing the mix contained in the mixing container.

The special feature of this method and a mixing machine designed in this way is that the process of mixing is always carried out on only a fraction of the mixing material contained in the mixing container, wherein the mixed material is successively supplied to the one or more mixing tools by the Mischgutstromerzeugungseinrichtung for generating the Primärärmischgutstromes as a flow , The orientation of the secondary mixed material flow is transverse to the flow direction of the primary mixed material flow, wherein the primary mixed material flow is designed, so that successively and repeatedly the mixing material contained in the mixing container is supplied to the mixing tool or tools for carrying out the actual mixing. This concept has the advantage that the intended as a flow Primischischgutstrom can be generated with a minimum of energy input into the mix, since this stream basically serves only the purpose of promoting the mix contained in the container to the mixing tools or. Since the at least one mixing tool is provided for generating a secondary mixed material stream comprising a mass of material comparably small in comparison with the primary mixed material stream, the mixing tool can be designed to be correspondingly small in construction and with a correspondingly smaller dimensioned drive. In addition, this concept allows that several mixing tools can be arranged in the path of the primary mixed material flow, all of which work according to the aforementioned principle. If several such mixing tools are provided, they can be designed differently with regard to their tools. Therefore, it is possible with the above-described method and the above-described mixing machine to equip the mixing head with one or more dispersing tools and one or more homogenizing tools. With a mixing machine designed in this way, a mix can be mixed optimally according to the respective requirements, since the individual mixing tools can be controlled differently and, if desired, independently of one another. These can be operated individually or in addition to achieve a mixing result. By this possibility and by the separation of Mischgutbewegungen in a primary mixed flow as a flow and a Sekundärhmischgutstrom as Mischgutstrom this allows better control and a more sophisticated adjustment of the process parameters responsible for the mixing process.

If the mixing tool is a dispersing tool with which a higher or higher energy secondary mixed material flow is generated, the energy input into the mixed material flow is relatively low even in such an embodiment of the mixing tool. On the one hand, the particles which form the secondary mixed material stream only stay in the latter for a certain period of time before they, as a consequence of the conveying process, remain in this particle of the primary mix stream are brought out of the secondary mix stream. Consequently, these particles discharged from the secondary mixed material stream then have sufficient opportunity to cool down before they are again supplied to this or another mixing tool by the circulation of the primary particle stream.

For generating a primary mixed material stream, a correspondingly pivotable suspension of the mixing container can be used as Mischgutstromerzzeugungseinrichtung. The primary mix stream is then generated by a corresponding movement of the mixing tank. Such a movement of the mixing container may be a pendulum and / or a tumbling motion. In this case, it is preferable to move the pendulum axis about an axis of rotation in discrete steps.

According to another embodiment, it is provided to generate the primary mixed stream by at least one arranged in the mixing vessel, rotatingly driven conveying tool. In such an embodiment, the primary mixed material stream is conveyed concentrically around the axis of rotation of the conveying tool, which axis of rotation preferably corresponds to the longitudinal axis of the mixing container. According to one embodiment, such a delivery tool is a soil-clearing, low-speed driven tool with its shaft passing through the bottom of the mixing head, comprising at least one bottom-clearing blade. In this embodiment, it is provided that the movement path of the at least one blade of the conveying tool with respect to the bottom of the mixing head also cross-shaft of the at least one mixing tool at a greater radial distance from the shaft of the conveying tool is arranged as the shaft of the mixing tool. Thus, in this embodiment, the blade is guided in the radial direction with respect to the shaft of the conveying tool on the outside of the respective shaft or of the or the tools of the mixing tool. The delivery tool is designed to clear the ground, so that no sediment accumulates on the bottom of the mixing container in the mixing position of the mixing machine, which is not supplied to further mixing.

Because by the delivery tool no or at most only a small amount of energy is introduced into serving as a flow Primaryischgutstrom, is not to be feared that caked on these tools Mischgutpartikel. Therefore, a cleaning of this mixing machine, in particular its delivery tools easily and as a result is faster to perform.

A designed as Bodenräumer conveyor tool has according to an embodiment of at least one helical segment-like designed conveying arm, which is arranged in the radial direction with respect to the shaft of the tool on the outside of the or the mixing tools vorbeiführbar. For gripping mixing material located on the bottom of the container part of the mixing head, which is arranged in the region of the shaft passage of the mixing tool or tools, the at least one blade of the conveying tool preferably has a recess pointing inwards in the radial direction, while the blade itself extends into the extends the region near the shaft of the conveying tool. The recess serves to move the conveying arm past the mixing tool or tools. The helical segment-like designed conveyor arms extend from the blade to a height above the upper end of the mixing tools. This ensures that a Mischgutmaterialumverteilung done to a sufficient extent.

For mixing heads of smaller diameter, the shaft of the mixing tool (s) will typically be inclined to the shaft of the conveying tool.

Fig.1:

eine schematisierte perspektivische Ansicht einer Mischmaschine mit einem an den Mischkopf derselben angeschlossenen, ein Mischgut enthaltenden Behältnis in Mischstellung,

Fig. 2:

eine perspektivische zum Teil geschnittene Einsicht in den Mischkopf der Mischmaschine der Figur 1,

Fig. 3:

eine Draufsicht auf den Mischkopf der Figur 2,

Fig. 4:

eine perspektivische Einsicht in einen Mischkopf gemäß einer weiteren Ausgestaltung einer Mischmaschine entsprechend derjenigen der Figur 1 und

Fig. 5:

eine Schnittdarstellung durch den Mischkopf der Figur 4.

Further advantages and embodiments of the invention will become apparent from the following description of embodiments with reference to the accompanying figures. Show it:

Fig.1:

a schematic perspective view of a mixing machine with a connected to the mixing head thereof, a mixture containing container in the mixing position,

Fig. 2:

a perspective partially cut insight into the mixing head of the mixing machine of FIG. 1 .

3:

a plan view of the mixing head of FIG. 2 .

4:

a perspective view into a mixing head according to another embodiment of a mixing machine corresponding to that of FIG. 1 and

Fig. 5:

a sectional view through the mixing head of FIG. 4 ,

A mixing machine 1 for industrial purposes has a frame 2, on which a mixing head 3 is pivotally mounted. The pivot axis of the mixing head 3 is denoted by the reference symbol S in FIG. 1 indicated. About a drive 4, the mixing head 3 is pivotable about its pivot axis S at least 180 °. In the illustrated embodiment, the pivotability of the mixing head 3 serves the purpose that in its opposite to the representation in FIG. 1 rotated 180 ° position a mixed goods container 5 as a mix containing container can be connected to the mixing head 3, then the unit formed from Mischgutcontainer 5 and mixing head 3 - the actual mixing container - in the FIG. 1 shown mixing position of the mixing head 3 to pivot. In this position, the mixing head 3 of the mixing machine 1 is at the bottom, so that the mix contained in the Mischgutcontainer 5 falls on the arranged in the mixing head 3 tools.

The mixing head 3 of the illustrated embodiment has two tools, which are each driven by an electric motor in the illustrated embodiments. A first electric motor 6 serves to drive a conveying tool; a second electric motor 7 serves to drive a mixing tool.

FIG. 2 shows the mixing head 3 with its tools W ₁ , W ₂ in a perspective view. The mixing head 3 has a container part 8 with a bottom 9 and a cylindrical wall section 10 formed thereon. The transition from the bottom 9 into the wall section 10 is designed to form a specific radius. The container part 8 is enclosed in a housing 11. The housing 11 carries at its free End of a coupling flange 12 to which a complementarily designed coupling piece of the Mischgutcontainer 5 rests after connection to the mixing head 3. This is used in the illustrated embodiment, the coupling flange 12 as an element for connecting a container containing a mix, here: the Mischgutcontainers. 5

The driven by the electric motor 6 tool W ₁ is designed as a delivery tool and engages with its shaft 14, the bottom 9 of the container part 8 in its center. The shaft 14 of the tool W ₁ thus extends along the longitudinal axis of the mixing container and thus parallel to the cylindrical wall portion 10, which surrounds the shaft 14 concentrically. The conveying tool W _{1 of} the mixing machine 1 comprises in the illustrated embodiment two conveying arms 15, 15.1. In the following, the conveying arm 15 is described. The conveying arm 15.1 is constructed identically. Both conveyor arms 15, 15.1 are arranged at an angular distance of 180 ° to each other. The conveyor arm 15 is designed like a spiral segment and has a curved coil section 16. The coil segment 16 carries at its lower bottom end a blade 17. Between the lower edge of the blade 17 and the top of the bottom 9 remains a small movement gap. Held is the helical segment 16 on a rod 18, which in turn is connected to the shaft 14. The rod 18 extends in the radial direction to the shaft 14. The helical segment 16 is curved in total from its blade 17 to its upper end and inclined inwardly in the direction of the shaft 14. In FIG. 2 this is especially noticeable on a wedge K of the conveying arm 15.1, by means of which the helical segment 16.1 is connected to the rod 18.1. The inclination of the helical segment 16 serves to compensate for the force acting on the mix during operation of the conveyor tools W ₁ centrifugal force with the purpose of counteracting a collection of material on the inner wall of the wall portion 10 of the container part 8 and thus to support the desired redistribution in the vertical direction. In its lower portion, a recess 19 is introduced into the helical segment 16. For this reason, the blade 17 is widened with respect to the recess 19, in the radial direction inwards. The radially outer end 20 of the helix 16 is guided at a short distance from the inside of the wall section 10.

In addition to the two conveying arms 15, 15.1, the conveying tool W ₁ in the illustrated embodiment has two auxiliary tools 21, 21.1, which are connected directly above the passage of the shaft 14 through the bottom 9 to the shaft 14. The auxiliary tools 21, 21.1 are designed as individual wings, which are employed in the direction of rotation of the tool W ₁ . The auxiliary tools 21, 21.1 serve the purpose of directing the mixed material flow generated by the conveying arms 15, 15.1 from the shaft 14 in the radial direction to the outside. The conveying tool W ₁ is driven by the electric motor 6 and an intermediate gear 22 slowly rotating during operation of the mixing machine 1. The rotational speed of the conveying tool W ₁ is set in such a way that the mix is conveyed through the low-energy primary mixed material flow. This provided in the illustrated embodiment as a recirculating flow Primischischgutstrom serves to supply the mixed material to a mixing tool W ₂ described below.

The mixing head 3 further has a mixing tool W ₂ , which is driven by the electric motor 7. The shaft 23 of the tool W ₂ is inclined to the axis of rotation of the shaft 14. This arrangement has been chosen in the mixing machine 1 shown in the figures, so that the mixing blades of the tool W _{2 are arranged} at a sufficient distance from the inside of the wall portion 10 and the movement track of the conveying arms 15, 15.1. In order to be able to grasp mixed material from the region of the passage of the shaft 23 through the bottom 9, the recess 19 serves the helical segments 16, 16.1 of the two conveying arms 15, 15.1. The mixing tool W ₂ is designed as a dispersing tool. Its mixing blades are driven at an operation of the mixing machine 1 at a corresponding speed, which exceeds the speed of the conveying tools W ₁ many times.

FIG. 3 shows in a schematic plan view of the arrangement of the shaft 14, the two conveying arms 15, 15.1 with their blades 17, 17.1 and the two auxiliary tools 21, 21.1 to each other and in relation to the tool W _2nd Only for playback reasons, the housing 11 and the wall portion 10 of the container part 8 in FIG. 3 as a polygon shown. In fact, these elements are continuously curved.

The mixing machine 1 or its mixing head 3 is operated for mixing a mixed material contained in the mixed goods container 5 in the in FIG. 1 The mixed material container 5 is in this position in its overhead position, so that through the open top of the mix in the container part 8 of the mixing head 3 with the tools W ₁ , W ₂ arranged therein. For mixing, the conveying tool W _{1 is driven} by the electric motor 6 to work as Bodenräumer redistribute the resting on the bottom 9 of the container part 8 mix, namely lift off from the bottom 9 and about the helical segments 16, 16.1 of the two conveying arms 15, 15.1 raise and to unload over the upper end of the helical segments 16, 16.1 and subordinate possible way in the direction of the shaft 14. Thus, the conveying arms 15, 15.1 work in the manner of a plow. With the aid of the auxiliary tools 21, 21.1, the material conveyed via the helical segments 16, 16.1 is brought outward in the radial direction and thus returned to the blades 17, 17.1 of the conveying arms 15, 15.1.

Due to the low rotational speed, a low-energy primary mixed material flow is generated with the conveying tool W ₁ , in which the mixed material or the particles participating in the mixed material flow are moved at a speed of about 1-5 m / sec. The conveyor speed to be achieved depends on the material to be mixed. The material delivery by the conveying tool W ₁ thus takes place concentrically around the shaft 14.

The conveying tool W ₁ serves not only for redistribution, but also for supplying the mixed material to the mixing tool W ₂ responsible for the actual mixing process. This tool W ₂ , which is driven at a higher speed, generates a secondary mixed material flow which operates transversely to the primary mixed material flow, in which, in the illustrated embodiment, the mixed material particles are conveyed at a speed of 30-40 m / sec. Thus, the actual mixing process of the mixed material is carried out by the tool used for dispersing W ₂ .

In the course of the primary mixed flow, the mixed material particles are supplied to the tool W ₂ , detected by this and incorporated into the Sekundärhmischgutstrom and pushed out by nachgeschobenes mix from the Sekundärhmischgutstrom after a certain residence time to be re-supplied to the mixing tool W ₂ on the primary mixed flow after appropriate transport. This process is repeated until the desired mixing result is achieved.

The description of the two Mischgutströme - Primärischgutstrom and arranged transversely arranged Sekundärischgutstrom - make it clear that all or substantially all of the mixing material in the mixing container is part of the Primärärmischgutstromes, and that only a fraction of the mixed material contained in the mixing container is part of the Sekundärhmischgutstromes. Thus, in the mixing machine 1 there is a separation between a primarily as transport or Fördermischgutgutstrom for conveying the mixed material to the actual mixing tool and a Sekundärhmischgutstrom, which is the actual, for the mixing process significantly responsible Mischgutstrom.

In the illustrated embodiment, the conveying tool W ₁ has two helical segments 16, 16.1, each with a blade 17 and 17.1 in the ground-near area. A supply of mix to the mixing tool W ₂ takes place at a constant rotational speed of the conveying tool W ₁ with different intensity, this Mischgutzufuhrbewegung is greatest when a helical segment 16 or 16.1 has fallen below a certain minimum distance to the tools of the mixing tool W ₂ and this happens outside , Such mixed material supply can be addressed in the broadest sense as a pumped material supply.

In the described embodiment, the Mischgutpartikel be moved in the secondary Mischgutstrom about 8-10 times faster than in the primary Mischgutstrom.

FIG. 4 shows the mixing head 24 of a further, otherwise not shown mixing machine. The mixing head 24 is designed with respect to its conveying tool W ₁ 'as well as this to the mixing head 3 of the previous embodiment is described. In contrast to the mixing head 3, the mixing head 24 has two mixing tools W ₂ 'and W ₂ "The mixing tool W ₂ ' is designed as a dispersing tool, just like the mixing tool W _{2 of} the mixing head 3. The two mixing tools W ₂ 'and W ₂ " are arranged diametrically opposite one another with respect to the axis of rotation of the conveying tool W ₁ '. The mixing tool W ₂ "is designed in the manner of a screw conveyor, while the mixing tool W ₂ " is a homogenizing tool with which a low-energy secondary mixed material flow is produced. The mixing tool W ₂ "is also driven by an electric motor 25.

Depending on the material to be mixed and / or the mixing result to be achieved, either the mixing tool W ₂ 'or the mixing tool W ₂ "or both mixing tools W ₂ ', W ₂ " are operated to produce a respective secondary mixed material flow. Thus, the mixing head 24 can be used for mixing a variety of materials, without tool change.

To facilitate operation of the mixing head 24 for a user, it may be provided to couple a control of the mixing tools W ₂ 'and W ₂ "and the conveying tool W ₁ ' in terms of their speed depending on the material to be mixed and the desired mixing result. On a control panel can be adjusted as adjustment variables in addition to an individual control of the tools W ₁ ', W ₂ ' and W ₂ "the control variables" dispersion "and" homogenization ". If a higher dispersion of the mixed material is desired, this will generally result in an increase in the rotational speed of the mixing tool W ₂ ', which under certain circumstances may be associated with a reduction in the rotational speed of the other mixing tool W ₂ " Likewise, the rotational speed of the conveying tool W ₁ 'can be integrated to optimize the operation of the tools of the mixing head 24 to achieve a desired mixing result.

The sectional view of the FIG. 5 the mixing head 24 illustrates the to Longitudinal axis of the mixing head 24 inclined arrangement of the axes of rotation of the mixing tools W ₂ 'and W ₂ ".

With the mixing head 24, it is possible to realize different mixing processes and also different mixing process stages in one and the same mixing process. Thus, with the mixing head 24 in a first mixing stage, primarily the dispersing tool W ₂ 'can be used as a mixing tool in order to achieve a dispersion and an associated comminution. In an adjoining mixing stage, the rotational speed of the dispersing tool W ₂ 'is lowered or this tool W ₂ ' is completely switched off and followed by a phase of homogenization in which either alone or primarily the homogenizing tool W ₂ "is operated as a mixing tool in a mixing head contain other mixing tools, more mixing sub-steps can be driven.

By virtue of the concept of producing a plurality of mixed material streams and the resulting reduced energy input, in the case where a dispersing tool is present as a mixing tool, the particle size in the mixed product having a relatively narrow particle size spectrum can be set. This is primarily due to the fact that the dispersing tool does not have to be switched off prematurely as a result of increasing heating, as is the case in conventional mixing machines.

If desired, the pivotable configuration of the mixing heads 3, 24 can be used to put this together with Mischgutcontainer 5 in a tumbling or parallel movement. This allows the mixing process to be supported.

As a result of the above-described multi-stream conception - primary mixed stream and at least one secondary mixed material stream arranged transversely thereto - a mixing process can also take place with a lower degree of filling of the mixing container. While in conventional container mixers a filling of at least 60% had to be given in order to form a mixing thrombus necessary for the mixing process, with the described method and the described mixing machine satisfactory mixing results can be achieved even with mixing containers, which are only filled to 40% with mix.

In the above description, a dispersing tool and a homogenizing tool designed as a screw conveyor are described as mixing tools. Since the mixing tools are not responsible for the material redistribution in the design described, other mixing tools can be used, such as helical or segmental screws, i. Screw conveyors, which are composed of individual spiral segments. The individual spiral segments may be paddle-shaped. These can be adjustable in terms of their inclination.

The description of the invention has been made with reference to an embodiment. Without departing from the scope of the claims, numerous further embodiments of the invention will become apparent to a person skilled in the art without these having to be explained in greater detail.

LIST OF REFERENCE NUMBERS

1

mixer

2

frame

3

mixing head

4

drive

5

Mischgutcontainer

6

electric motor

7

electric motor

8th

container part

9

ground

10

wall section

11

casing

12

coupling flange

14

wave

15, 15.1

conveying arm

16, 16.1

Wendel segment

17

shovel

18, 18.1

Rod

19

recess

20

graduation

21, 21.1

auxiliary tool

22

transmission

23

wave

24

mixing head

25

electric motor

K

wedge

W ₁ , W ₁ '

conveying tool

W ₂ , W ₂ ', W ₂ "

mixing tool

Claims (13)

A method of mixing powdered and / or granular materials with a mixing machine (1), comprising a mixing head (3, 24) configured with one or more elements (12) for connecting it to a container (5) containing a mix for formation a closed mixing container containing the mixture, which mixing head (3, 24) is pivotally mounted relative to a frame (2) such that the mixing container formed from the mixing head (3, 24) and container (5) can be pivoted to perform the mixing process, and comprising a device for generating a Mischgutstromes and at least one engaging in the Mischgutstrom, rotationally driven mixing tool (W ₂ , W ₂ '), characterized in that by means of Mischgutstromerzeugungseinrichtung a low-energy Primärmischgutstrom as a flow for supplying the mixed material contained in the mixing container to the at least one mixing tool (W ₂ , W ₂ ') produce t is, by which mixing tool (W ₂ , W ₂ ') a only a fraction of the mixed material in the mixing container grasping, but responsible for the actual mixing secondary mixed material flow is generated as a cross-flow to serving as a flow Primärmischgutstrom, the Primärhmischgutstrom by at least one in the mixing vessel arranged, rotationally driven conveying tool (W ₁ , W ₁ ') is generated. A method according to claim 1, characterized in that the primary mixed flow is generated by a movement of the mixing container, preferably by utilizing its pivotable suspension. A method according to claim 2, characterized in that for generating the primary mixed goods flow of the mixed material container is placed in a swinging and / or tumbling motion. Method according to one of claims 1 to 3, characterized that the Primärmischgutstrom is concentrically supported to the longitudinal axis of the mixing vessel. A mixing machine comprising a mixing head (3, 24) configured with one or more elements (12) for connection to a container (5) containing a mix to form a closed mixing vessel containing the mix, which mixing head (3, 24) is pivotable a frame (2) is mounted such that the mixing container (3, 24) and container (5) formed mixing container for performing the mixing process is pivotable, and comprising means for generating a Mischgutstromes and at least one engaging in the Mischgutstrom rotationally driven mixing tool , characterized in that the Mischgutstromzeugungseinrichtung for generating a low-energy primary mixed material flow as a flow for supplying the mixed material contained in the mixing container to the at least one in the mixing head (3, 24) engaging in the generated by the Mischgutstromerzeugungseinrichtung Primarilyischgutstrom arranged Blending tool (W ₂ , W ₂ ') is designed and that the at least one mixing tool (W ₂ , W ₂ ') is provided for generating a comprehensive only a fraction of the mixed material in the mixing container secondary stream as a cross flow to the primary mixed stream, wherein as Mischgutstromzeugungseinrichtung a rotatably driven bodenräumendes conveying tool (W _1, W ₁ ') for causing conveyance of mix concentric with the rotation axis of the transfer tool (W _1, W _1') is provided, which tool (W _1, W ₁ ') via at least one blade (17, 17.1), and that the at least one mixing tool (W ₂ , W ₂ ') between the movement path of the blade (17, 17.1) of the conveying tool (W ₁ , W ₁ ') and the shaft (14) of the mixing tool (W ₁ , W ₁ ') is arranged. Mixing machine according to claim 5, characterized in that the conveying tool (W ₁ , W ₁ ') comprises at least one helical segment-like designed conveying arm (15, 15.1), in the radial direction relative to the shaft (14) of the conveying tool (W ₁ , W ₁ ') on the outside of the at least one mixing tool (W ₂ , W ₂ ') is arranged vorbeibewegbarbar. Mixing machine according to claim 6, characterized in that the conveying arm (15, 15.1) above its blade (17, 17.1) has a recess (19) pointing inwards in the radial direction and below the recess the blade (17, 17.1) with its to the bottom (9) of the mixing head (3, 24) facing a radial distance from the shaft (14) of the conveying tool (W ₁ , W ₁ '), which is greater than the distance of the shaft while leaving a certain play ( 23) of the mixing tool (W ₂ , W ₂ ') of the shaft (14). Mixing machine according to claim 6 or 7, characterized in that the conveying tool (W ₁ , W ₁ ') has a plurality of, at the same angular distance from each other arranged conveying arms (15, 15.1). Mixing machine according to one of claims 5 to 8, characterized in that the conveying tool (W ₁ , W ₁ ') at least one on its shaft (14) connected auxiliary tool (21, 21.1) is arranged, whose radial extent is smaller than the distance of Shaft (23) of the mixing tool (W ₂ , W ₂ ') of the shaft (14) of the conveying tool (W ₁ , W ₁ '). Mixing machine according to one of claims 5 to 9, characterized in that the mixing tool (W ₂ , W ₂ ') is a dispersing tool or a homogenizing tool (W ₂ "). Mixing machine according to one of claims 5 to 10, characterized in that the longitudinal axis of the shaft (23) of the mixing tool (W ₂ , W ₂ ', W ₂ ") relative to the shaft (14) of the conveying tool (W ₁ , W ₁ ') is inclined. Mixing machine according to one of claims 5 to 11, characterized in that the mixing machine has at least two mixing tools (W ₂ ', W ₂ "), one of which is a dispersing tool (W ₂ ') and another is a homogenizing tool (W ₂ "). Mixing machine according to claim 10 to 12, characterized in that the homogenizing tool (W ₂ ") is designed in the manner of a screw.

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