EP3192582A1 - Tool for a mixing device and mixing device - Google Patents

Abstract

The invention relates to a tool (1) for a mixing device with a container for holding mixed material, in which the tool (1) rotates about a rotation axis (2) in a first direction of rotation (5) in order to comminute and / or close the mixture Mix. A rotary shaft (3) with at least one tool blade (7, 8, 17a, 17b, 18a, 18b, 19a, 19b) extending radially outward from the rotary shaft (3) forms an end face (9) in the first direction of rotation (5). with in a plane perpendicular to the axis of rotation (2) outwardly curved contour and in the opposite direction a rear side (10) in a plane perpendicular to the axis of rotation (2) inwardly arched Kontor from. The tool blade (7, 8, 17a, 17b, 18a, 18b, 19a, 19b) has at least one nozzle (20) for supplying gases, liquids and / or solids. Furthermore, the invention relates to a mixing device with a corresponding tool.

Description

The invention relates to a tool, in particular for comminuting and / or mixing of mixed material, for a mixing device with a container for receiving the mixed material, wherein the tool rotates in the container in a first rotational direction about an axis of rotation to crush the mix and / or and wherein the tool comprises a rotary shaft having at least one tool blade extending radially outward from the rotary shaft, forming a front end in the first rotational direction and a rear side in a direction opposite to the first rotational direction. The invention further relates to a mixing device with a corresponding tool.

Generic tools are used in mixing devices to mix or bulk material or bulk material, for example, dry and / or moistened solids to comminute and / or. An essential requirement for such mixing devices is a sufficient mixing action to ensure good homogeneity of the mixture. The term mix can be a combination of different substances, especially solids such as baking mixes. However, within the meaning of the invention, a single solid, such as e.g. Flour being processed by the blender. In a processing stage, additives (additives) such as gases, liquids and / or solids combinations thereof are introduced into the mix. This may be e.g. to be preservative, colorant, dye, etc. or even just air.

Mixing devices known from the prior art have a container rotatably mounted about a vertical axis for receiving the mixed material with an upper opening. Through the opening of the container is loaded with mix. A mixing tool, for example a rotatable mixing shaft with at least one helix, protrudes from above through the opening obliquely to the vertical axis of the container into it and rotates. The tool moves through the mix and mixes the substances, so that they are processed to a homogeneous mass. At appropriate speed not only a mixing takes place, but the tool additionally comminutes the mix. Such devices are typically used separately and are known by the term chopper or comminution tool. In particular, the front side of the tool blades ensures a comminution of the mixed material by this hits the mix at high speed.

From the DE 197 23 325 C1 For example, a batch mixer for mixing dry or wet solids with liquid addition is described. In a container, a rotating around the container longitudinal axis mixing tool is mounted, which transports the mix along the container wall upwards. In the bottom area in the container wall, a rotatably driven by an electric motor hollow shaft is arranged, which projects into the interior of the container. From the hollow shaft extending radially outward each cutting rotors, which serve to avoid lumps in the mix.

The in the DE 24 25 727 C3 described mixing device has in the bottom region a vortex device having a plurality of stirring members, which extend radially from the axis of rotation of the vortex device to the outside. The stirring members are angled at their outer end, wherein they bend upwards or downwards. Nozzles for introducing additives are arranged below the stirring members on an injection pipe.

It is known that the efficiency of moving through the mix tools certain limits are set, because often an insufficient material movement of the mix takes place, so that the mix is not a homogeneous Mass can be processed or shredded. This also means that the additives can not be efficiently introduced into the mix.

The object of the present invention is to improve the degree of efficiency of such a tool and a mixing device.

This object is achieved by a tool having the features of claim 1 and by a mixing device having the features of claim 15.

According to the invention, the end face in a plane perpendicular to the axis of rotation has an outwardly curved contour and the rear side in a plane perpendicular to the axis of rotation an inwardly curved Kontor, and the tool blade has at least one nozzle for supplying additives or gases, liquids and / or Solids.

Due to the special contour of the tool blade, there are differences in speed between the flows at the front and rear sides, which causes laminar and turbulent flow conditions in the mix in the area of the front and rear sides. As a result, the mix is whirled up, mixed better and can also be better crushed. The first direction of rotation designates the direction of rotation of the tool intended for the operation of a mixing device. The sheet geometry according to the invention and the possibility of introducing additives such as gases, liquids or solids or combinations of these substances during rotation from the tool blade into the mix, the result of the working process is significantly improved because the nozzle is used directly in the Verwirbelungsbereichen. The feeding of additives through the nozzles, in combination with the tool blades, causes additional mixing and uniform distribution of the additives.

The plane perpendicular to the axis of rotation designates the plane on which the axis of rotation is vertical. In other words, the axis of rotation is in each case perpendicular to the plane spanning the plane and lying perpendicular to each other vectors. The corresponding viewing direction along the axis of rotation may be referred to as the plan view of the plane. The front side may also be referred to as a front edge of the tool blade in the rotational direction and the rear side in the direction of rotation as a rear edge of the tool blade.

In the direction of rotation provided for the operation of the radially outwardly extending portion of the tool blade forms the intersecting end of the mix, in particular end face. The end face is the material flow, which flows along the tool blade, facing and therefore can also be referred to as windward side. The rear or so-called rear side refers to the side that is oriented opposite to the direction of rotation. This corresponds to the lee side of the tool blade and can form a rear surface accordingly. The tool blade moves around the axis of rotation in a plane to which the axis of rotation of the shaft is orthogonal.

The end face can have an arcuate cross section or an arcuate contour in a viewing direction along the axis of rotation (plan view) and thereby extend radially outwards, thereby approximating a first axis, along which the tool blade extends radially outwards, such that a outwardly convex or convex contour forms. The rear side extends arcuately radially outwardly and approaches the first axis. However, the rear side has an inwardly curved, concave shape or contour.

According to the invention, the surface portion of the end face may be greater than the area proportion of the rear side of the total area of the front and rear sides.

According to the invention, the rotary shaft and the tool blade can have at least one passage for additives to the at least one nozzle, so that additives can be passed through the rotary shaft and the tool blade from the nozzle into the mix. For this purpose, the rotary shaft may be formed as a hollow shaft or hollow lance for carrying out appropriate media or designed as a hollow shaft and receive a pipe or a pipe. The passage for the additives has at least one opening which is connected to the passage in the tool blade. The nozzles may be formed in the form of holes, openings or the like in the tool blade.

The tool according to the invention can be used as a mixing tool to mix the mix. Alternatively or additionally, the tool can be used as a comminuting tool to comminute the mix and thus improve the mixing result. The invention makes it possible to advantageously integrate the functions of a mixer and a comminution tool into a tool. Thus, the tool can be used in addition to a mixing helix, but also as an alternative to the mixing helix.

The tool is rotatably mounted, preferably in a lid closing the opening of the container and driven in rotation by a suitable drive, such as an electric motor. The tool blade or the tool blades are preferably arranged on a lower, that is to say on the end of the shaft projecting into the container.

In a plan view in the direction of the axis of rotation, the tool blade may have an outer contour surrounding the blade, which extends radially outward from the shaft like a wing. The tool blade can also have a directed in a first direction of the axis of rotation flat underside and directed in the opposite direction flat top. The sides may be defined by an edge, e.g. on the front and rear side, be separated from each other, wherein the edge may extend parallel to the axis of rotation and / or perpendicular to the top or bottom of the tool blade. The edges can also be inclined, e.g. as cutting edges, be formed. In plan view, the tool blade has a circumference that extends along the edge of the tool blade.

According to a further embodiment of the invention, the tool blade can end in the plan view in the radial direction or radially outward in a blunt outer portion. The outer portion may be configured to interconnect the rear and front sides. The outer section provides improved flow conditions, resulting in particularly strong and stable vortex configurations that provide additional mixing of the mix. In the area of the blunt outer portion, the mix does not strike the front edge of the tool blade as on the front side, but the outer area of the tool blade is drawn past the mix and draws a circular track through the mix.

Preferably, the tool blade has a plurality of nozzles which are arranged such that at least a number of the nozzles have a different distance from the axis of rotation of the rotary shaft. Thus, a plurality of nozzles may be distributed along the circumferential edge of the tool blade such that at least a number of the nozzles have a different distance from the axis of rotation of the rotary shaft. On the one hand increases with increasing distance from the central axis of the peripheral speed of the tool blade, so that the impact on the mix can be done at a higher speed. In other words, the mixture hits the outer surface of the tool blade at a much higher speed on the end face, as in the vicinity of the central or rotational axis. At the same time, the acceleration of the additives within the tool blade in the vicinity of the axis of rotation is less than on the outer circumference of the tool blade. Thus, the pressure at which the liquid exits the nozzle is varied.

When the tool is used as a chopper by being driven at high speed, the centrifugal force causes the additive to be thrown outward in the tool blade, causing it to experience high acceleration and thereby leak out of the nozzles at high pressure.

A further embodiment of the invention provides that the tool blade has a number of nozzles at least on the front side and / or on the rear side. Preferably, the blunt outer portion also has at least one nozzle. The nozzles are distributed in the circumferential direction of the tool blade along the edge surrounding the tool blade. By introducing the additive into the mix at the front and at the rear, particularly advantageous effects occur in these areas. At the front side, the bulk material and / or mix enters the leading edge of the tool blade and the nozzles at high speed. At the appropriate rotational speed, the mixture bursts and fanning the exiting flow of additive further, so that the distribution of the additives is improved. At the rear side, turbulence of the bulk and / or mixed material is formed, which mixes with the almost undisturbed emerging additive flow.

In order to increase the speed differences between the front side and the rear side, a further embodiment of the invention provides that the tool is perpendicular in a first direction or along a first axis extends radially outward to the axis of rotation and that with increasing distance in the first direction from the axis of rotation of the radial distance between the end face and the axis of rotation is greater than the radial distance between the rear side and the axis of rotation. In this case, in each case a reference point on the axis in the first direction can be selected, on which the respective point of the front side or the rear side is projected vertically in plan view.

Preferably, the tool has two in the plane perpendicular to the axis of rotation opposite tool blades. These are then preferably combined in a tool element or form a tool element. It has been found to be particularly advantageous if the two tool blades are at least partially integrally connected to each other. For this purpose, the tool element may comprise at least one component which forms a portion of the first tool blade and a portion of the second tool blade. For example, the tool element may include a planar top member and a planar bottom member, wherein the top member and the bottom member each form a portion of the first and second tool blades. According to another embodiment, at least two tool blades are combined in a tool element and formed in one piece. For this purpose, the tool element may comprise an upper side member and a lower side member, which are interconnected by a peripheral edge. The invention also includes tool elements with more than two tool blades, for example three tool blades which are distributed at constant angular intervals around the rotary shaft.

To reinforce the turbulences, the outwardly curved end faces of a first tool blade and a second tool blade may be diametrically opposed with respect to the axis of rotation. The same goes for the after inside arched tail sections. This means that the tool element is shaped such that the outer contour of the first tool blade leaf substantially corresponds to a point mirroring of the second tool blade through the axis of rotation.

In order to achieve efficient turbulence and turbulent flows in one direction along the axis of rotation of the rotary shaft, a further embodiment of the invention provides that a plurality of tool elements or tool blades arranged one behind the other, preferably evenly distributed, are provided on the rotary shaft in the direction of the axis of rotation.

In continuation of this inventive concept adjacent or immediately adjacent tool elements or tool blades are arranged angularly offset in the direction of the axis of rotation, which amplifies the Verwirbelungseffekt in the vertical direction. The angular offset arrangement ensures that, for example, the turbulence generated on the leeward side is carried upwards in a vertical direction by the turbulences of the adjacent rotational blade following in the direction of rotation.

According to a further embodiment of the invention, the planar upper side member and the planar lower side member are spaced from each other and preferably arranged parallel to each other and connected by a flat outer contour, eg the front and rear side, or the peripheral edge, so that between the top and the lower side or the upper side component and the lower side component forms a cavity. In the outer contour, a plurality of nozzles may be provided. Further, the passage for the additives in the hollow shaft may communicate with the cavity, so that additives introduced into the rotating shaft may be ejected through the nozzles. The cavity then serves as a passage for the additives. It proves to be advantageous if, as described above, the top member and the bottom component are each part of two opposing tool blades. As a result, production costs can be saved and the assembly is considerably simplified.

According to a further embodiment, the tool comprises a temperature control device, preferably arranged in the rotary shaft, for tempering, ie for cooling and / or heating, the additives. The tempering device may have an inflow and an outflow for a tempering agent, e.g. have a heat transfer fluid such as cooling water. For example, it is possible to integrate the temperature control device in a temperature control circuit by connecting the inflow and the outflow with a heat exchanger or the like.

According to a further embodiment of the invention, the tool comprises at least two bushings and / or conduits provided in the hollow rotary shaft, such as pipes or the like, which extend in the axial direction of the rotary shaft, preferably parallel to the feedthrough for the additives and are connected to one another such that a temperature control can be pumped through the lines in the manner of a circuit.

According to a further embodiment, it is provided that the tempering device has a passage for the passage or passage of temperature control, wherein the implementation of the additives is at least partially disposed in the passage for the tempering. Efficient temperature control is achieved in particular when the hollow rotary shaft is designed as a tube, in particular for the inflow of the temperature control means, so that, for example, the inflowing temperature control medium flows in the intermediate space between the feedthrough for the additives and the hollow rotary shaft. For discharging the tempering means, one or more lines or pipes extending parallel to the passage for the additives may be provided, in the lower part of the rotary shaft with the space between the passage for the additives and the rotary shaft, so the inflow, in communication and form a circumferential channel.

On the side facing away from the tool blade or the tool blades side of the rotary shaft, the bushings may have corresponding connections for feeding and discharging for the tempering. To the terminals, a heat exchanger or the like can be connected to close the temperature control loop. In the lower part of the rotary shaft, the inflow and outflow communicate with each other. The terminals may e.g. be provided in the form of radial rotary inlets that allow the supply of fluids into rotating leads. To connect the bushing for the additives are axial rotary joints, which are connected to the upper end of the rotary shaft. Suitable rotary inlet are, for example, rotary entrances of DEUBLIN GmbH from Hofheim-Wallau, Germany.

In order to optimally place pipes or pipes for the inflow or outflow and to prevent movements within the rotary shaft, spacers may be provided between the pipes and an inner wall of the rotary shaft and / or between the pipes and the outer wall of the passage for the additives. The feedthrough for the additives is preferably arranged centrally in the hollow rotary shaft, so that the rotational axis of the feedthrough coincides with the rotational axis of the rotary shaft.

The object underlying the invention is further achieved by a mixing device for mixing mixed material comprising a tool with the features described herein. Such a mixing device may, in particular, have a container, which is preferably mounted rotatably about a vertical axis, for receiving the mixed material. It proves to be particularly advantageous when the tool is rotatably mounted in a lid covering a container opening, so that the tool can be removed from the container together with the lid, and wherein the tool can be inserted into the container when the lid is placed over the container whose opening is positioned (so-called mixer bell). The mixing device may further comprise a mixing tool, such as a mixing helix or the like, wherein the mixing tool transports the mix by rotation substantially along a container wall of the container upwards and mixed. The tool or its shaft can basically have the connections described above for connecting a source of additives, such as gases, liquids or solids. These can be introduced by means of a pump or other suitable device for introducing the additives into the hollow shaft.

Further developments, advantages and applications of the invention will become apparent from the following description of exemplary embodiments and the drawings. All described and / or illustrated features alone or in any combination form the subject matter of the invention, regardless of their summary in the claims or their back references.

Fig. 1

in einer Draufsicht in einer Blickrichtung entlang einer Rotationsachse ein Werkzeug nach einer ersten Ausführungsform der Erfindung;

Fig. 2

das Werkzeug aus Fig. 1 mit schematisch dargestellten Strömungsverhältnissen;

Fig. 3

ein Werkzeug gemäß einer weiteren Ausführungsform der Erfindung in einer perspektivischen Ansicht; und

Fig. 4

in einer Schnittansicht ein Werkzeug nach einer weiteren Ausführungsform der Erfindung;

Fig. 5

in einer Schnittansicht einen oberen Abschnitts des Werkzeugs aus Figur 4;

Fig. 6

in einer Schnittansicht einen unteren Abschnitts des Werkzeugs aus Figur 4;

Fig. 7

in einer Schnittansicht einen oberen Abschnitts des Werkzeugs aus Figur 4; und

Fig. 8

in einer Draufsicht den unteren Abschnitt des Werkzeugs aus Figur 4.

Show it:

Fig. 1

in a plan view in a viewing direction along a rotation axis, a tool according to a first embodiment of the invention;

Fig. 2

the tool off Fig. 1 with schematically shown flow conditions;

Fig. 3

a tool according to another embodiment of the invention in a perspective view; and

Fig. 4

in a sectional view of a tool according to another embodiment of the invention;

Fig. 5

in a sectional view of an upper portion of the tool FIG. 4 ;

Fig. 6

in a sectional view of a lower portion of the tool FIG. 4 ;

Fig. 7

in a sectional view of an upper portion of the tool FIG. 4 ; and

Fig. 8

in a plan view of the lower portion of the tool FIG. 4 ,

The presentation in the FIG. 1 corresponds to a viewing direction along the axis of rotation 2 provided for the tool 1 shown. The illustrated plan view corresponds to a plane which runs perpendicular to the axis of rotation 2. Shown is the cross section of the tool 1 in this plane. The tool 1 comprises a shaft 3 with a hollow inner section 4. In operation, the tool 1 is rotated about the rotation axis 2 in a first direction of rotation 5.

The tool 1 comprises a tool element 6 fastened to the shaft 3 with two mutually opposite tool blades 7 and 8. The first tool blade 7 extends radially outwardly in a first direction along the axis of rotation 2, as viewed in FIG FIG. 1 illustrated X-axis. The second tool blade 8 extends along the X-axis in the opposite Direction. The tool 1 can be used as a mixer or as a chopper. In particular, in this case, you can call the tool blades as Zerhackerblätter.

Like the ones in the FIG. 1 shown top view, the tool blades 7, 8 each have a wing-like contour. In the direction of rotation 5, the tool blades 7, 8 each form an end face 9 facing the direction of rotation, while they each form a rear side 10 in the direction away from the direction of rotation 5. The end faces 9 are each formed as flat end faces and the rear sides 10 are formed as flat rear surfaces which extend in a direction parallel to the axis of rotation.

The front side 9 is shaped so that it has an outwardly curved contour in the illustrated plan view. That means it's convex. In contrast, the rear side 10 is shaped so that it has an inwardly curved contour, that is concave.

The front side 9 and the rear side 10 are each connected by a blunt outer portion 11. The tool blade 7 or 8 ends in each case in this blunt outer portion 11, so that the tool blade 7, 8 has the shape of a truncated wing.

The end faces 9 of the tool blades 7 and 8 are relative to the axis of rotation 2 diametrically opposite. The same applies to the rear sides 10 of the tool blades 7 and 8. In fact, the outer contour of the tool element 6 is such that the outer contour of the second tool blade 8 is formed by a point reflection of the outer contour of the first tool blade 7 through the rotation axis 2.

Shown is a reference point 12 on the X-axis. Also drawn is a reference line extending through this reference point 12 parallel to the Y-axis (dash-dot line). With increasing distance of this reference line from the axis of rotation 2 along the X-axis, a point intersecting this reference line on the face 9 is located radially farther from the axis of rotation 2 than a reference line intersecting point on the tail side 10. In the example shown, therefore, the radial Distance 13 of the end face 9 greater than the radial distance 14 of the rear side 10th

The FIG. 2 shows the flow conditions on the tool 1 and the tool element 6 when it is immersed in a mix, for example. Solids or a pasty mass, and rotates about the axis of rotation 2 in the direction of rotation 5.

The curved shapes of the front and rear sides 9, 10 create areas along which the mix flows at different flow rates. Since the end face 9 is relatively flat and elongated radially outwards, high flow velocities at the end face 9, combined with a laminar flow, result. On the rear side 10, however, results in a very turbulent flow pattern with vortex formations in the mix. The flow velocity here is comparatively low compared to the front side. The different speeds result from the fact that the outwardly curved longer path at the end face 9 must be covered by the medium surrounding the rotating tool blade in the same time as at the inwardly curved rear-side sections 10 of the tool blade, where the inwardly curved edges Cause turbulence. The different speeds create stalls that lead to turbulent flows. The change from laminar to turbulent flows, the internal friction between these multiphase flows, and especially the pressure difference between the windward and leeward sides between the two areas cause additional mixing and a uniform distribution of the mix.

As shown in the figure, arise in areas along the end faces 9, the laminar flows 15 at high speed. In the area of the rear sides 10, a turbulent flow pattern with vortex formations 16 arises due to the lower flow velocities. These flows cause a high mixing of the mixed material.

The in the FIG. 3 illustrated embodiment differs from the embodiment in the FIGS. 1 and 2 in that three tool elements 17, 18 and 19 are provided at the end of the rotary shaft 3, each also comprising two opposite tool blades 17a, 17b, 18a, 18b, 19a, 19b. The tool blade 19b is opposite to the tool blade 19a and therefore not visible. The rotary shaft 3 rotates in operation about the rotation axis 2 in the direction of rotation. 5

The uppermost tool element 17 is aligned parallel to the lower tool element 19 with respect to the rotation axis 2. In contrast, the central tool element 18 is arranged angularly offset with respect to the upper tool element 17 and the lower tool element 19. This also results in the vertical direction, i. in the direction of the axis of rotation 2, between the tool elements 17, 18 and 19 each turbulent flows 16, which also provide for mixing in the vertical direction.

By way of example, the structure of the tool elements 17, 18, 19 or of the tool blades is explained on the uppermost tool element 17. The uppermost tool element 17 comprises a planar upper side component 17c and an equally shaped lower side component 17d, which are arranged parallel to each other at a distance and by the peripheral edge, which inter alia Front and rear sides 9, 10 forms, connected to each other, so that in the interior of the tool blade 17a, 17b and the tool member 17 forms a cavity. The tool blades 17a and 17b share a common upper side member 17c and a common lower side member 17d, so that the tool blades 17a and 17b are partially formed integrally.

At the end faces 9 and at the rear sides 10, as well as in each case at the blunt outer portion 11 of the tool blades 17a, 17b, 18a, 18b, 19a, 19b, a plurality of nozzles 20 are formed for introducing additives into the mix. The nozzles 20 communicate with the cavity of the respective tool blade, the cavity also being in communication with a passage in the shaft 3. Through the implementation and the cavity additives, such as. Gases, liquids or solids or combinations thereof can be passed through the nozzle 20 and introduced into the mix.

As a result of the rotation of the tool 1, turbulent flow conditions 16 are produced by the tool elements 17, 18 and 19, which also lead to internal friction between these multiphase flows. There are pressure fluctuations between the areas of laminar flow and turbulent flow, which cause additional mixing. As a result, additives are evenly distributed. The introduction of additives also provides for a loosening of the mix and supports the mixing positively.

The FIG. 4 shows in a sectional view a tool 1 according to a further embodiment of the invention. The structure of the tool elements corresponds to that of the tool elements FIG. 3 , At the lower end of the rotary shaft 3 tool blades 7.8 are provided. The rotary shaft 3 is formed here as a hollow shaft and has in its interior a passage 21 in the form of a conduit which communicates with the nozzles 20 of the tool blades 7, 8 at the lower end of the rotary shaft 3. Inside the rotary shaft 3 is a passage 22 for introducing or supplying a tempering (temperature control water) is provided. The feedthrough 22 is referred to as an inflow feedthrough. The temperature control water passage 22 is formed by the hollow inner portion 4 of the rotary shaft 3 with the additive feed passage 21 disposed inside the inner portion 4 so that a temperature control water flowing through the inner portion 4 is the passage 21 lapped for the additive.

In the inner portion 4 of the rotary shaft 3, two lines 23 are further ( FIG. 6 ), which are also arranged in the passage for the temperature control water, but provide for the outflow of the temperature control water. These are referred to as drainage bushings. At the upper end of a holder 24 is arranged, with which the tool 1 can be attached to a mixer cover or the like. Also, a drive 25 for rotationally driving the rotary shaft 3 is provided.

The FIG. 5 shows the upper portion of the tool 1 from the FIG. 4 in the sectional view, but rotated by 90 ° about the axis of rotation. In the upper region of the rotary shaft 3, a supply 26 and a connection for the temperature control water is provided. In this feeder 26, the temperature control water can be introduced into the inner portion 4 and the inflow passage 22 so that it flows in the interior space between the inside of the rotary shaft 3 and the additive feedthrough 21. The additive feedthrough 21 is arranged centrally in the rotary shaft 3 in the form of a tube. When the temperature control water passes via the supply 26 in the inner portion 4, it flows in the direction of the tool blades down.

In the FIG. 6 is the lower portion of the tool 1 from the FIG. 4 shown. The additive passage 21 is in each case with the hollow interior spaces of the individual tool elements or tool blades in conjunction, which by curved arrows is indicated. When the tool rotates, the additive enters the interior of the tool blades 7, 8 and is introduced through the nozzles 20 in the mix, the shape of the tool blades 7, 8 as explained above, which causes advantageous Verwirbelungseffekte. While the additives reach the tool blades 7, 8, they are tempered by the temperature control water in the passage 22. The tempering may consist of cooling or heating of the additives.

As the FIG. 6 Furthermore, in the interior section 4, the passages 23 serving as a drain for the temperature control water are arranged in the form of conduits. These drain passages 23 are arranged on opposite sides of the additive passage 21. In the lower region, the discharge passages 23 have an opening 27, which communicate with the inlet passage 22 for the temperature control water. By means of the outflow passages 23, the temperature control water can thus be sucked off after passing through the inner section 4 in the lower region of the tool 1 and pumped upwards. The openings 27 protrude in the lower region of the tool 1 in a circumferential annular channel. As the FIG. 6 Furthermore, 23 spacers 28 are provided between the inner wall of the rotary shaft 3 and the drain passages, which ensure the secure fit of the discharge passages 23 in the rotating rotary shaft 3.

The FIG. 7 shows the upper portion of the tool 1 from the FIG. 4 , As can be seen, the drain passages 23 end in a drain 29, with a radial rotary inlet. There, the temperature control water is taken from the drain passages 23 and can be supplied to a heat exchanger, not shown, or another receptacle for the outflowing temperature control water. This heat exchanger, not shown, can Also with the supply 26 for the inflow passage for the temperature control water are in communication, so that a temperature control circuit can be established. At the upper end of the rotary shaft 3 there is also an axial rotary inlet 30, via which the additives or the additive can be introduced into the additive passages 21, which is indicated by a downward arrow.

In the FIG. 8 is again the lower portion of the tool 1 from the FIG. 4 shown in a viewing direction along the axis of rotation. Marked are the openings 27, which open into a circulation channel 31. This circulation channel 31 is in communication with the inner portion 4 and the inflow passage 22, so that even with rotation of the openings 27 always an optimal outflow of the temperature control water is guaranteed.

LIST OF REFERENCE NUMBERS

1

Tool

2

axis of rotation

3

rotary shaft

4

inner portion

5

direction of rotation

6

tool element

7

tool blade

8th

tool blade

9

front

10

rear side

11

dull outer section

12

reference point

13

radial distance

14

radial distance

15

laminar flow

16

turbulent flow

17

tool element

17a

tool blade

17b

tool blade

17c

Top part

17d

Underside members

18

tool element

18a

tool blade

18b

tool blade

19

tool element

19a

tool blade

19b

tool blade

20

jet

21

Carrying out for additive

22

Feedthrough for temperature control water (inflow)

23

Passage for temperature control water (drain)

24

bracket

25

rotary drive

26

additions

27

openings

28

spacer

29

outflow

30

axial rotary inlet

31

circulation channel

Claims (15)

Tool (1) for a mixing device with a container for receiving mixed material, in which the tool (1) rotates about a rotation axis (2) in a first direction of rotation (5) in order to comminute and / or mix the mixture Tool (1) a rotary shaft (3) with at least one of the rotary shaft (3) radially outwardly extending tool blade (7, 8, 17a, 17b, 18a, 18b, 19a, 19b), wherein the tool blade (7, 8 , 17a, 17b, 18a, 18b, 19a, 19b) in the first direction of rotation (5) forms a front side (9) and in a direction opposite to the first direction of rotation (5) a rear side (10);
characterized in that the end face (9) in a plane perpendicular to the axis of rotation (2) has an outwardly curved contour and the rear side (10) in a plane perpendicular to the axis of rotation (2) has an inwardly arched Kontor; and
in that the tool blade (7, 8, 17a, 17b, 18a, 18b, 19a, 19b) has at least one nozzle (20) for supplying gases, liquids and / or solids. Tool according to claim 1, characterized in that a plurality of nozzles (20) on the tool blade (7, 8, 17a, 17b, 18a, 18b, 19a, 19b) are distributed such that at least a number of the nozzles (20) at a different distance to the rotation axis (2) of the rotary shaft (3). Tool according to claim 1 or 2, characterized in that the tool blade (7, 8, 17a, 17b, 18a, 18b, 19a, 19b) at least on the end face (9) and / or on the rear side (10) a plurality of nozzles (20 ) having. Tool according to one of the preceding claims, characterized in that the tool blade (7, 8, 17a, 17b, 18a, 18b, 19a, 19b) ends in the radial direction in a blunt outer portion (11). Tool according to one of the preceding claims, characterized in that the blunt outer portion (11) has at least one nozzle (20). Tool according to one of the preceding claims, characterized in that the tool blade (7, 8, 17 a, 17 b, 18 a, 18 b, 19 a, 19 b) extends in a first direction radially outwardly, and that with increasing distance in the first direction of the rotational axis (2) of the radial distance (13) between the end face (9) and the rotation axis (2) is greater than the radial distance (14) between the rear side (10) and the rotation axis (2). Tool according to one of the preceding claims, characterized by at least two in a plane perpendicular to the axis of rotation (2) opposite tool blades (7, 8, 17a, 17b, 18a, 18b, 19a, 19b). Tool according to claim 7, characterized in that the tool blades (7, 8, 17a, 17b, 18a, 18b, 19a, 19b) are at least partially integrally connected to each other. Tool according to claim 8, characterized in that opposite tool blades have a common surface component (17c) and a common lower side member (17d) which are arranged at a distance from each other, so that a cavity is formed therebetween. Tool according to one of the preceding claims, characterized in that on the rotary shaft (3) in the direction of the axis of rotation (2) a plurality of tool blades (17a, 17b, 18a, 18b, 19a, 19b) are arranged one behind the other. Tool according to claim 10, characterized in that in the direction of the axis of rotation (2) adjacent tool blades (17a, 17b, 18a, 18b, 19a, 19b) are arranged angularly offset. Tool according to one of the preceding claims, characterized in that the rotary shaft (3) and the at least one tool blade (7, 8, 17a, 17b, 18a, 18b, 19a, 19b) has a passage for the gases, liquids and / or solids , Tool according to claim 12, characterized by a preferably in the rotary shaft (3) arranged temperature control for controlling the temperature of the gases, liquids and / or solids. Tool according to claim 13, characterized in that the tempering device has a passage (22) for Temperierungsmittel, wherein the passage (21) for the gases, liquids and / or solids is at least partially disposed in the passage (22) for Temperierungsmittel. Mixing device for mixing mixed material with a tool (1) according to one of the preceding claims.

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