WO2019185234A1

WO2019185234A1 - Mixer system

Info

Publication number: WO2019185234A1
Application number: PCT/EP2019/053565
Authority: WO
Inventors: Fabian KÖFFERS; Horst Weiss
Original assignee: Siempelkamp Maschinen- Und Anlagenbau Gmbh
Priority date: 2018-03-24
Filing date: 2019-02-13
Publication date: 2019-10-03
Also published as: DE102018002475A1

Abstract

The invention relates to a mixer system comprising at least two mixing devices (101) for continuously mixing fibres or chips with a binder for the production of fibre- or chipboards, wherein each mixing device (101) has at least one mixing chamber (1) supported by a framework (15, 16, 17), as well as multiple mixing or conveying tools (3, 8, 9, 10) secured on a rotatable mixer shaft (2) therein. In order to create a mixer system having mixing devices for fibres and glues, which can also undergo maintenance work during production, according to the invention, the mixer system (100) has at least one working position (41.1, 41.2) in which a mixing device (101) carries out the mixing process during operation, and at least one maintenance position (42.1, 42.2), at a distance from the working position (41.1, 41.2), to which a mixing device (101) can be transported by a transport means (43).

Description

mixer system

Description:

The invention relates to a mixer system with at least two mixing devices for continuously mixing fibers or chips with a binder for the production of fiber or chipboard, each mixing device at least one of a framework supported mixing chamber and therein a plurality of fixed to a rotatable mixer shaft mixing or Having conveying tools.

Such mixing devices are also referred to as gluing mixers. The mixing chamber is generally cylindrical in shape as a drum, but this drum is not rotated, but is fixed and only the mixer shaft rotates with the mixing or conveying tools.

The gluing of fibers or chips and consequently the mixing of fibers or chips with a binder or glue represents an essential process step in the course of the production of fiber or chipboard. The quality of the plates produced, for. B. wood-based panels or in particular also material plates from the fibers of the straw of annual plants, also depends significantly on the quality of the fibers and in particular a homogeneous gluing of the fibers. In the following, the description of the invention focuses on the mixing of fibers and binder, but this does not exclude the use of chips instead of fibers.

It is basically known to mix fibers in a so-called blowline with a binder or glue and thus to glue. However, the throughputs are limited in this gluing technique. Incidentally, in practice occasionally problems with so-called Leimflecken occur. Especially

the handling of isocyanate binders causes problems in blowline technology.

For this reason, the gluing of fibers in a gluing mixer has already been proposed. However, the results obtained in the past in practice with known blending mixers have often been unsatisfactory. Isocyanate binder, for example, hardens at a certain temperature, which may already occur in the mixer. A device for the continuous lining of fibers, which is designed as a horizontally oriented gluing mixer in drum construction, is known for example from DE 24 38 818. The mixing shaft is hollow in this embodiment and serves the glue supply. For this purpose, the mixer shaft is occupied with mixing tools, which are provided in the region of their hollow training with it Leimschleuderrohren protruding. The diameter of such a mixing container is about 600 mm, wherein a rotational speed of the mixer shaft of 1500 revolutions per minute is proposed. This is to achieve a throughput of 3 to 4 t fibers per hour.

In practice, care has been taken so far in the gluing of fibers with such devices that the fibers to be glued, which are set by the mixing tools in a "rotating" movement, have a predetermined speed or peripheral speed.

From DE 10 2009 057 916 B4 but it is also already known that preferably a high centrifugal acceleration of the fibers in the area of the mixer inner wall in the order of 10,000 to 30,000 m / sec ² at a correspondingly matched ratio of speed and diameter of

Mixing chamber can be selected. This significantly improves the mixing ratio.

The mixing chamber has at least one loading opening for the supply of fibers and at least one discharge opening for the removal of the fiber-binder mixture and a plurality of binder feed openings for the supply of the binder. The invention of DE 10 2009 057 916 B4 proposes that a plurality of spiked combs distributed over the circumference of the mixer shaft, each having a plurality of radially outwardly oriented spines, are provided as mixing tools, wherein the spiked combs extend substantially parallel to the mixer axis and in each case two adjacent spiked combs are offset in the axial direction by a predetermined amount to each other. These spiked combs or spikes take on the one hand a mixing function and on the other hand a conveying function, because in rotation of the mixer shaft with the mixing tools, the fibers are not only mixed with the binder, but the mixture is transported simultaneously in the conveying direction of the loading opening to the discharge properly and with high throughput , Due to the axial offset of the individual spiked combs one achieves a spiral arrangement of the spikes, which improves the conveying effect. The individual spines can also be referred to as spines or pins. It is also known to use shovel-like conveying tools instead of these pins, in particular in the vicinity of the loading or unloading opening. The spines, pins, thorns and blades are to be referred to in the following simplified as mixing or conveying tools.

Nevertheless, this embodiment, which has been tried and tested successfully, is also associated with disadvantages that are mainly found in complicated maintenance work.

The high speeds and centrifugal accelerations are partly responsible for high temperatures in the mixer. This creates the risk that at higher temperatures quickly curable glues and binders, such as isocyanate, cause damage in the mixing chamber. Incidentally, other suitable binders would be primarily methylene diphenyl isocyanates, urea formaldehydes, phenolic resins and the like. Ä. The mixing chamber must then be cleaned during a production standstill with great effort.

The mixing chamber inner wall and the tools are also subject to high wear, depending on the fiber and binder material. For this purpose, it is already known to use wear-resistant materials for the mixing chamber and the tools. However, a repair or replacement of these parts is relatively often necessary, which also leads to a loss of production.

The invention has for its object to provide a mixer system with mixing devices for fibers and glues, which can also be maintained during production.

The object is achieved with the features of claim 1 and in particular in that the mixer system has at least one working position in which a mixing device performs the mixing operation during operation, and at least one maintenance position, away from the working positions, to which a mixing device transportable with a transport is.

In this way it is possible for a mixing device to be maintained "at rest" while one or possibly several other mixing device (s) remain / remain involved in the production process. It has

It turned out that if, as usual, the production process is interrupted during maintenance, is economically less efficient, as an additional to the necessary in the production process mixing devices in use. For maintenance, therefore, a mixing device which is not involved in the production process can be brought from a working position to a maintenance position with a means of transport. There it does not disturb the continued production process.

As a means of transport vehicles or cranes are considered. Preferably, at least two working positions are present.

From a number of three mixing devices, two occupy the working positions and one is in the maintenance position, the mixer system according to the invention works advantageous if, as is common in today's fiberboard manufacturing plants, a large throughput of fibers must be provided with a binder. The high throughput usually requires higher speeds and both together causes the mixing chamber and the mixer shaft with their mixing tools must be examined more frequently for wear. The creation of a separate maintenance position understandably makes more sense the more work mixing devices are in use.

It is advantageous if the means of transport is formed by at least one rail vehicle, which is movable under the mixing device.

It can then take the weight of the mixing device and bring the dissolved from its anchor mixing device to the maintenance position.

It is preferred if the rail vehicle is equipped with a lifting element and / or the mixing device with a lowering device.

If the rail vehicle has a lifting element or the mixing device has a lowering device, the mixing device can be placed particularly gently on the loading surface of the rail vehicle. In this context, rails have proven at ground level with very flat dolly, as they are sold by the company Strothmann Machines & Handling GmbH in Schloß Holte-Stukenbrock.

Furthermore, it is advantageous if the maintenance position is in a different space than the working positions.

The process of maintenance, such as cleaning then does not affect the production process.

It can be provided that a couplable drive for the mixing device is provided in the maintenance position. Thus, the mixing device can be driven experimentally during repair work. In addition, for example, balancing operations can be conveniently performed.

With the interest of rapid maintenance, it may be advantageous if the mixing chamber of the mixing device comprises two connectable half-shells, which are supported in an upper frame part and a lower frame part. This is particularly the case when the upper frame part and the lower frame part are connected to each other via a hinge and that the respective

associated half-shell in the upper frame part and / or the lower frame part releasably secured and removable.

The mixing chamber is then divisible and the mixer shaft with its tools and the inner peripheral surface of the mixing chamber are freely accessible, which greatly simplifies any maintenance. In the particular case, the upper and the lower frame part, which may be formed, for example, similarly to a receiving tray for the half-shells, can then be opened with the half-shells. If this unfolding is made possible, for example, by more than 90 °, preferably even by 180 °, one obtains the particular advantage that the half shells of the mixing chamber can be removed from the upper frame part and / or the lower frame part.

In this case, for reasons of maintenance shortening even a half-shell with signs of wear or Bindingsverklebungen be completely replaced. This results in the particular advantage that you do not have to change the entire mixing chamber in case of maintenance, but only takes a half-shell from the associated frame part. Connected with it also removes the cooling channels which are thus easily accessible maintenance.

Because in this case it is particularly advantageous if cooling channels are arranged on the outer peripheral surface of the mixing chamber.

Preferably, a cooling channel is formed of at least one coolant channel leading first channel portion, a deflection and at least one immediately adjacent returning second channel portion, wherein the channel portions are formed from semi-finished products

Furthermore, it is advantageous if a part of a cooling channel is formed by the outer peripheral surface of the mixing chamber and if a cooling channel is releasably secured on the outer peripheral surface of the mixing chamber.

On the one hand, the mixing chamber can be cooled in this way simply and effectively, so that premature curing of binders can be suppressed. The cleaning work in the mixing chamber are thereby reduced. On the other hand, with an expansion of the mixing chamber from the mixing device, the cooling channels can be removed with the same and maintained or replaced.

If the cooling channels consist of semifinished products, that is to say, for example, of tubes, profiles or bent metal sheets, this allows an inexpensive and rapid production of the mixing device and in particular of the mixing chamber or a half shell.

It is advantageously provided that the cooling channels are arranged meander-shaped on the outer peripheral surface of the mixing chamber.

This can be, for example, two independent cooling circuits, one on each half shell.

In addition, if these cooling channels are detachably connected to the mixing chamber, maintenance in the maintenance position is simplified because these units made of semi-finished products can be replaced quickly. In order to easily maintain and replace the mixing or conveying tools, if they are polluted by the cured binder or damaged by abrasion of the fibers, it is preferred if the mixer shaft has partially covered grooves in which movable sliding blocks are arranged, the can be connected with a mixing or conveying tool.

Therefore, the mixer shaft according to the invention is provided with partially covered grooves in which a sliding block can be moved, which receives a tool. By partially covered grooves are therefore to be understood grooves having an opening width to one end of a tool

to be able to pass through. Partially covered, however, also means that the groove widens radially inward, so that a sliding block adapted to the expanded cross-section can not fall out upon rotation of the mixer shaft. The sliding block can therefore only be inserted from one end of the mixer shaft or an extension hole in the groove and under the cover.

Preferably, these mixing or conveying tools are also formed in the context of this invention without binder feed, ie the binder is not supplied via the mixing or conveying tools themselves, but via separate (non-rotating) binder feed tubes, which in z. B. radial direction by a predetermined amount through the mixing chamber shell protrude into the interior of the mixing chamber. It is expedient if the supply pipes projecting into the mixing chamber are arranged offset in the longitudinal direction to the tools. This configuration allows the mixing or conveying tools to readily rotate at high speeds without colliding with the feed tubes, although the feed tubes may protrude into the area of the mixing or conveying tools. The mixing device according to the invention is initially suitable for the gluing of fibers, for. B. for MDF production. Within the scope of the invention, fibers of annual plants, eg. B. fibers of straw, z. B. rice straw, glues. In particular, in such fibers of annual plants isocyanate or an isocyanate-containing binder is used as a binder. This binder is particularly useful for such annual plants because some annual plants are often provided with a wax layer. The high adhesive effect of isocyanate-containing binders nevertheless ensures perfect processing. The

Residues in the mixing chamber can be satisfactorily removed in the maintenance position.

Preferably, a plurality of parallel grooves extend axially on the circumference of the mixer shaft.

Thus, the mixing or conveying tools can be distributed as desired over the entire length of the mixer shaft. For example, depending on the fiber type and length, it is possible to use any number of conveying tools in the region of the loading or unloading opening. In the middle axial length range of the mixer shaft, the mixing tools, so for example spikes, can be accommodated in the required number. The distance between the tools is also adjustable.

Advantageously, the mixing or conveying tools with a threaded bolt at the end in a threaded bore of the sliding block can be screwed.

This attachment is easy to manufacture and the maintenance and replacement of tools is greatly simplified. In addition, a rotatable adjustment for the conveying tools is created.

In the following the invention will be explained in more detail with reference to exemplary embodiments illustrative drawings. Show it

1 shows a mixing device of the invention in the closed state in a perspective view,

2 is an exploded view of a mixing device of the invention in a perspective view,

Fig. 3 shows a detail of the mixer shaft of the invention in a perspective view

Fig. 4 shows a mixing chamber of the invention in a perspective view and

Fig. 5 is a plan view of a mixer system in the context of the invention.

In Figs. 1 and 2 there is shown a mixing apparatus 101 for continuous mixing of fibers with a binder for fiber board Fierstellung. The mixing device 101 has a substantially horizontally arranged, cylindrical mixing chamber 1 with a hollow cylindrical jacket 6 and at least one mixer shaft 2 arranged in a rotating manner in the mixing chamber 1, to which a plurality of mixing tools 3 are fastened. The mixing chamber 1 has a loading opening 4, which is formed in the embodiment as a loading funnel. About this loading funnel, the fibers are introduced from above into the interior of the mixing chamber 1. The fibers are mixed with the binder attached to the rotating mixer shaft 2 mixer tools 3 with a binder and at the same time promoted in the conveying direction from front to back through the mixer. The binder is supplied via a plurality of binder supply pipes 5, which are attached to the mixing chamber 1 and project through the mixing chamber jacket 6 into the interior of the mixing chamber 1. The supply of the binder is carried out in the illustrated embodiment, therefore, not on the mixer shaft or via the mixing tools, but on the firmly attached to the mixing chamber 1 and the jacket 6 of the mixing chamber 1 feed tubes 5, which are formed as feed nozzles. Furthermore, the mixing device has a discharge opening 7, which is arranged endwise in the conveying direction. About this discharge opening 7, the mixture of fibers on the one hand and binders on the other hand is discharged

or ejected. The discharge opening 7 is provided in the lower region of the mixing chamber 1.

An unillustrated drive is connected to the mixer shaft 2 in a conventional manner. In the exemplary embodiment, the drive is arranged on the end or outlet side.

Fig. 1 illustrates that a drive 34 is connected to the mixer shaft 2 in a conventional manner. In the exemplary embodiment, the drive is arranged on the end or outlet side. This should be easily coupled, because it recognizes below the mixing device, a transport 43, which is suitable to drive away the entire mixing device 101. This will be explained in more detail in the description of FIG. During operation of the mixing device according to the invention, the fibers are introduced via the loading opening 4 in the mixing chamber 1 and at the same time the binder, for. B. a glue such. As isocyanate, fed via the feed tubes 5. The fibers are transported by means of the mixing tools 3 along the longitudinal direction and thereby brought via the centrifugal acceleration in the outer region and thus accelerated in the region of the mixer wall 6. The rotational speed n of the mixer shaft and the diameter d of the mixing chamber are matched to one another such that the (nominal) centrifugal acceleration a of the fibers in the region of the mixer inner wall is 15,000 to 30,000 m / sec ² . In this case, the diameter d is preferably 300 mm to 1500 mm and the rotational speed n of the mixer shaft is preferably 2000 to 4000 U / min. It is therefore worked with relatively small diameters and high speeds, so that high centrifugal accelerations are achieved. This ensures that the fibers well on the jacket 6 and the inner wall of the mixer. 1

pressed and compressed as it were. This leads to increased friction and thus to a better gluing behavior. It can also high throughputs of z. B. 5 t to achieve 10 t per hour. The illustration in Fig. 2 shows in a special way the structure of the mixing device 101. Essentially, it consists of a lower, usually on the foundation releasably secured lower frame part 17 and an upper frame part 16, here in each case a cup-shaped sheet metal design with reinforcing Have bandages. The upper frame part 16 and the lower frame part 17 are connected to each other via a hinge 18. This joint 18 makes it possible that the cup-shaped upper frame member 16 and the cup-shaped lower frame member 17 can be folded to form a tubular jacket 6, but can also be opened by about 180 ° by means of a drive with gear 19.

As a result, the mixing chamber 1, which is likewise divided into an upper flared shell 11 and a lower flared shell 12, can be inserted into the shell-shaped framework parts 16, 17, but can also be removed for quick maintenance. The shrouds 11, 12 are preferably bent from a sheet and heat treated. If the mixing chamber 1 is likewise split open with the pouring or unfolding process, the mixer shaft 2 with its mixing tools 3 is freely accessible in a maintenance-friendly manner. In addition, the upper Flalbschale 11 or the lower Flalbschale 12 of the mixing chamber of the respective scaffolding half removed and replaced completely if too much wear.

As can be seen in FIG. 2, a plurality of mixing tools 3 distributed over the circumference of the mixer shaft 2, each having a plurality of radially outwardly oriented spikes 8, are provided as mixer tools 3 in the exemplary embodiment. The mixing tools 3 extend along the longitudinal direction of the

Mixing chamber and thus parallel to the longitudinal axis of the mixer. Preferably, in each case two adjacent mixing tools 3 are arranged offset in the axial direction or in the longitudinal direction by a predetermined amount to each other. This configuration results in that the ends of the individual spines 8 are arranged in a helical shape in a plan view. This ensures that on the spines 8 not only a perfect mixing of the fibers with the binder takes place, but that at the same time a perfect transport of the mixture is ensured with high throughput. In the embodiments, a plurality of feed pipes 5 are arranged in a row along the longitudinal direction of the mixer.

The binder feed tubes 5 protruding into the mixing chamber through the mixer wall 6 are arranged offset in the longitudinal direction to the spikes 8 of the mixing tools 3.

FIG. 2 also shows that the region of the mixer shaft 2 assigned to the loading opening 4 is designed to be free of spikes, wherein conveying tools 9 are fastened to the mixer shaft 2 in this feed region. These

In the exemplary embodiment, conveying tools are paddle-shaped as starting tools or starting paddles. They ensure that the fibers entering via the loading opening 4 into the mixing chamber 1 are accelerated rapidly and conveyed into the gluing area.

In addition, it can be seen that the region of the mixer shaft 2 assigned to the discharge opening 7 is partially formed with spikes. In addition, ejection tools 10 are attached to the mixer shaft 2 in this discharge area. These ejection tools 10 are paddle-shaped formed as Auswurfpaddel. They ensure rapid removal of the mixture of fibers and binder and consequently the glued fibers via the discharge opening 7.

In an alternative embodiment, not shown, the invention also includes embodiments in which the binder on the mixer shaft and the mixing tools, for. B. the spines, is supplied. In such a mixer with "Innenbeleimung" the mixer shaft is formed as a hollow shaft and the spikes are also designed as a binder feed tubes, which are connected to the mixer shaft.

If work is carried out with glue feed tubes which project in a substantially radial direction through the mixer jacket 6 into the mixing chamber 1, there is the possibility that these glue tubes are designed to be height-adjustable. This means that the immersion depth of the glue pipes can be adjustable in the radial direction into the interior of the mixing chamber. Fig. 3 shows clearly how the mixing and conveying tools 3, 8, 9, 10 are easy to adjust to the mixer shaft 2 adjustable. The mixer shaft 2 has in this embodiment a plurality of longitudinally arranged T-slots, ie grooves 20 which are partially covered. The shape of the groove 20 may differ within the scope of the invention and, for example, be dovetailed.

Within the groove 20 sliding blocks 21 are slidably inserted, which are provided with a threaded hole. Each mixing and conveying tool 3, 8, 9, 10 has on a lower shaft a threaded bolt 23 which is screwed into the sliding block 21. With the help of a lock nut 24, the mixing and conveying tool 3, 8, 9, 10 is fixed. In this case, a thick washer 25 larger diameter than that of the lock nut 24 helps to direct the forces beyond the groove cover in the mixer shaft 2.

Fig. 4 shows the cooling of the mixing chamber 1 in the context of this invention. The jacket of the mixer preferably water cooled. These are on the

Outside surface of the mixing chamber cooling channels made of semi-finished products 26 with at least one coolant inlet 28 and a coolant outlet 29 attached. The individual channel sections 27.1, 27.2 run in this embodiment in parallel in the axial direction and are connected via deflections 31 meandering.

Preferably, the semifinished products are pipes, pipe sections or beveled metal sheets which are adhesively bonded to the outer circumference of the mixing chamber 1, welded on or screwed on using interposed seals. For then it is possible to form a part of the channel wall 30 through the outer surface 14 of the mixing chamber 2 itself. Thus, the heat transfer is significantly improved. An exemplary screw connection 35 of bent metal sheets 26 with the mixing chamber 1, which together with a part of the surface 30 of the mixing chamber form a cooling channel 26, is shown in FIG. 4a. If the cooling channel 26 is detachably mounted on the mixing chamber 1, it can easily be maintained separately. Just as the spikes or pins are designed as wear-resistant spikes or pins, and the inner walls of the mixing chamber 1 wear-resistant, z. B armored with abrasion resistant coatings, be formed. By way of example, a surfacing weld 33 having a surface hardness of> 600 HV or silicon carbide tiles 32 is suitable here.

Finally, FIG. 5 shows an entire mixer system 100, by way of example for a large rice straw plant. In such a plant, the mixing devices are particularly at risk because the fibers to be mixed with binders are still very abrasive. To meet the maintenance requirements,

are provided for the mixing devices 101 working positions 41.1, 41.2, 41.3, 41.4 and two maintenance positions 42.1, 42.2. in a separate maintenance room. In both positions, the upper frame part 16 and the upper half shell 11 are shown unfolded by 180 °.

Between the individual working and maintenance positions transport means 43, which are able to transport a mixing device 101. A currently to be transported mixing device 101 a is shown in the closed state.

The solution shown and preferred in the exemplary embodiment in this case comprises transport carriages which can be moved on rails 44. It is envisaged that a lifting device 45 is present (recognizable in Fig. 1), which can lift the mixing device 101 detached from the foundation, so that a trolley can drive underneath. The mixing device is then deposited in its entirety on the transport means 43 and, for example, moved from a working position 41.1, 41.2, 41.3, 41.4 to a maintenance position 42.1, 42.2. The means of transport can be moved longitudinally and transversely, as offered for example by the company Strothmann Machines and Handling Systems GmbH with its round rail system.

In the maintenance position, the mixing device can then be conveniently opened and cleaned without interrupting the production process. If the mixing device is connected to a drive 34, the mixer shaft 2 can be rebalanced.

LIST OF REFERENCE NUMBERS

Claims

claims:

Mixer system comprising at least two mixing devices (101) for continuously mixing fibers or chips with a binder for the production of fiber or chipboard, each mixing device (101) comprising at least one mixing chamber (15, 16, 17) supported by a scaffold (15, 16, 17). 1) and therein a plurality of mixing or conveying tools (3, 8, 9, 10) fastened to a rotatable mixer shaft (2),

characterized in that

the mixer system (100) has at least one working position (41.1, 41.2) in which a mixing device (101) performs the mixing operation during operation, and at least one maintenance position (42.1, 42.2) away from the working position (41.1, 41.2), to the a mixing device (101) with a transport means (43) is transportable.

2. Mixer system according to claim 1, characterized in that at least two working positions (41.1, 41.2) are present.

3. mixer system according to claim 2, characterized in that the transport means (43) is formed by at least one rail vehicle, which is movable under the mixing device (101).

4. mixer system according to claim 3, characterized in that the transport means (43) is equipped with a lifting element and / or the mixing device with a lowering device.

5. Mixer system according to one of claims 1 to 4, characterized in that the maintenance position (42.1, 42.2) in a different space than the working positions (41.1, 41.2).

6. Mixer system according to one of claims 1 to 5, characterized in that in the maintenance position (42.1, 42.2) a couplable drive (34) for the mixing device (101) is provided.

7. Mixer system according to one of claims 1 to 6, characterized in that the mixing chamber (1) of the mixing device (101) comprises two connectable half-shells (11, 12) which in an upper frame part (16) and a lower frame part (17) are supported.

8. mixer system according to claim 7, characterized in that the upper

Scaffolding (16) and the lower frame part (17) via a joint (18) are interconnected and that the respective associated half-shell (11, 12) in the upper frame part (16) and / or the lower frame part (17) releasably secured and is removable.

9. mixer system according to one of claims 1 to 8, characterized in that cooling channels (26) on the outer peripheral surface of the mixing chamber (1) are arranged.

10. mixer system according to claim 9, characterized in that a

Cooling channel (26) from at least one coolant leading first channel portion (27.1), a deflection (31) and at least one immediately adjacent to the first channel section recirculating second channel section (27.2) is formed, wherein the channel sections (27,1, 27.2) of semi-finished are formed.

11. Mixer system according to one of claims 9 to 10, characterized in that a part of a cooling channel (26) through the outer peripheral surface of the mixing chamber (1) is formed.

12. Mixer system according to one of claims 9 to 11, characterized in that a cooling channel (26) on the outer peripheral surface of the mixing chamber (1) is releasably attached.

13. Mixer system according to one of claims 1 to 12, characterized in that the mixer shaft 82) partially covered grooves (20), in which movable sliding blocks (21) are arranged, with a mixing or conveying tool (3, 8, 9 , 10) are connectable.

14. Mixer system according to claim 13, characterized in that the mixing or conveying tools (3, 8, 9, 10) with a threaded bolt (23) at the end in a threaded bore (22) of the sliding block (21) are screwed.