Mixer of extruder

Abstract

An extruder mixer has a stator and a rotor disposed coaxially with respect to the stator. The rotor is rotatably mounted relative to the stator. The stator is at least partially disposed within a volume defined by the rotor. The rotor has a rotor cage with a plurality of holes. The hole is elongated in a longitudinal direction. The longitudinal direction of the rotor extends obliquely relative to the rotation axis of the rotor.

Description

[0001] The invention relates to an extruder mixer having a stator and a rotor, which is arranged coaxially with respect to the stator, wherein the rotor is rotatably supported with respect to the stator.

[0002] Extruder mixers of the type mentioned in the introduction are known in principle from the art and are commonly used for mixing viscous and partially filled fluids and molten polymers.

[0003] Utility model specification DE 7433808 U discloses a device for mixing plastic resins.

[0004] European patent application EP 0 048 590 B1 describes an extruder mixer having a hollow cylindrical stator and a cylindrical rotor supported for rotation in the stator. The mutually facing cylindrical surfaces of the rotor and the stator each carry a large number of parallel rows of cavities extending in the circumferential direction.

[0005] German patent application DE 10 2007 022 287 A1 discloses an extruder mixer having an extrusion screw comprising at least one sleeve and a cylindrical screw head supported therein.

[0006] It is an object of the present invention to provide an alternative extruder mixer.

[0007] An extruder mixer is a device that is specifically configured for use in an extruder and is used to mix materials intended to be extruded. Therefore, not every device suitable for mixing fluids can be construed as an extruder mixer.

[0008] The extruder mixer has a rotor and a stator. The rotor is rotatable relative to the stator. The stator is non-rotatable as long as it cannot rotate during normal use of the extruder mixer. This may be caused, for example, by the stator being fixedly mounted. Preferably, no other elements are arranged between the rotor and the stator.

[0009] The object is achieved in that the stator is at least partially arranged in a volume defined by the rotor. It has been found to be advantageous for the stator to be arranged predominantly inside the rotor with respect to its stator length in the axial direction.

[0010] The extruder mixer according to the invention forms the basis for an extruder with a high mixing capacity and a small installation space. Furthermore, it has been found that an extruder mixer in which the stator is at least partially arranged in the volume defined by the rotor can be retrofitted into existing extruders in a relatively simple manner. Moreover, due to the simple axial positioning of the stator, a possible variability is created. A decisive additional advantage of the extruder mixer according to the invention is that an additive or additives can be introduced into the inner volume of the rotor via the stator.

[0011] The present invention includes the recognition that, for all extruder mixers of the prior art, the rotor is rotatably arranged inside the stator. In contrast to this technical prejudice, in the extruder mixer according to the invention, the stator is at least partially arranged within the volume defined by the rotor. It has been found to be advantageous for the major length of the stator to be arranged within the volume defined by the rotor.

[0012] In a particularly preferred embodiment, the stator has at least one particularly elongated groove and the rotor has at least one particularly elongated hole. In another particularly preferred configuration, the groove and the hole are arranged in such a way that during operation of the extruder mixer, the groove and the hole at least partially overlap. Preferably, the stator has a large number of grooves and / or the rotor has a large number of holes. Preferably, the grooves cover at least 30%, in particular at least 50% or even at least 80% of the surface area of ​​the stator. Preferably, the holes cover at least 30%, in particular at least 50% or even at least 80% of the surface area of ​​the rotor. Due to the grooves and holes, the fluid can be mixed particularly well.

[0013] In a further particularly preferred embodiment, the rotor has a rotor cage. It has been found to be advantageous for the stator to have an axial hole, via which a fluid can be introduced into the rotor. It has been found to be advantageous for the stator to be arranged predominantly inside the rotor cage with respect to its stator length in the axial direction. A rotor cage is intended to be understood as a lattice structure formed by lattice support bars and holes formed between the lattice support bars.

[0014] In a particularly preferred embodiment, the rotor has a plurality of holes. The hole or holes can each be configured as a hole or a slot. In a particularly preferred embodiment, the holes of the rotor are arranged in a plurality of hole rows. It has been found that it is advantageous for the hole rows to each extend in the longitudinal direction (axial direction) of the rotor, in particular parallel to the axis of rotation of the rotor. In another particularly preferred embodiment, the hole rows are arranged on the rotor in a state uniformly spaced apart from each other along the circumference of the rotor. It has been found that it is advantageous for the holes to be configured to be elongated in the longitudinal direction and for their longitudinal directions to each extend parallel to the axis of rotation of the rotor. Alternatively, the longitudinal directions of the holes can each extend obliquely relative to the axis of rotation of the rotor.

[0015] The grooves in the stator are configured to be elongated in the longitudinal direction. The longitudinal directions of the grooves each extend obliquely relative to the rotation axis of the rotor. The longitudinal direction of the hole may be parallel to the longitudinal direction of the groove. The longitudinal direction of the hole may be oblique or cross relative to the longitudinal direction of the groove.

[0016] In another particularly preferred embodiment, the stator has a large number of grooves. In a particularly preferred embodiment, the grooves of the stator are arranged in a plurality of groove rows. It has been found that it is advantageous for the groove rows to each extend in the longitudinal direction of the stator, in particular parallel to the axis of rotation of the rotor. In another particularly preferred embodiment, the groove rows are arranged on the stator in a state uniformly spaced apart from each other in the circumferential direction of the rotor. It has been found that it is advantageous for the longitudinal portion of the stator formed with the plurality of grooves involved in the mixing operation to be arranged predominantly, preferably at a ratio of at least 50%, more preferably at least 80%, inside the rotor and / or the rotor cage.

[0017] It has been found to be advantageous that the holes of the rotor are each positioned with a center offset relative to the corresponding grooves of the stator. The center offset can be relative to the circumferential direction and / or the longitudinal direction of the stator. Due to the size and number of the grooves in the stator and the size and number of the holes in the rotor and the axial positioning of the rotor and the stator relative to each other, a variation of the mixing action is achieved (by changing the overlap of the inlet / outlet coverage). Thus, for example, by replacing the stator, the mixing capacity of the extruder mixer can be significantly influenced. Preferably, the arrangement of the holes of the rotor and the corresponding grooves in the stator is selected in rows and / or with a center offset of preferably 50% per row unit. Due to the axial displacement of the stator relative to the rotor, the offset (overlap) can be varied (10–50% / 90–50%).

[0018] In another particularly preferred embodiment, the holes of the rotor are arranged in an axially offset or spiral shape. It has been found to be advantageous that the holes of the rotor are introduced as a single-start or multi-start helix and that the holes preferably correspond to the grooves of the stator. It has been found to be advantageous that the grooves of the stator are introduced as a single-start or multi-start helix.

[0019] In another particularly preferred embodiment, the holes in the rotor and / or the corresponding recesses in the stator are in the form of spherical cups, part-circular disks and / or channel grooves.

[0020] In a particularly preferred embodiment, the number of grooves in the stator is different from the number of holes in the rotor. It has been found to be advantageous if the number of holes in the rotor is at least one greater than the corresponding number of grooves in the stator.

[0021] It has been found to be advantageous that the width of the hole in the rotor and / or the width of the corresponding groove in the stator is preferably 5 mm to 35 mm. The width of the hole and the groove is determined in the circumferential direction of the rotor or the stator. The length of the hole in the rotor and / or the length of the corresponding groove in the stator is preferably a larger number, preferably a factor of 2 to 5 times the width of the corresponding hole and / or groove. In another particularly preferred embodiment, the maximum depth of the groove in the stator, with respect to the radial direction of the stator, is preferably 5 mm to 15 mm. It has been found to be advantageous with regard to rheological optimization to choose the radius of the hole and / or the radius of the groove to be proportional to the corresponding width. In a particularly preferred embodiment, the radius is greater than 2 mm.

[0022] It has been found that it is advantageous for the holes of the rotor and / or the grooves of the stator, each with respect to their longitudinal direction, to extend parallel to the axis of rotation of the rotor. Alternatively, the holes of the rotor and / or the grooves of the stator, each with respect to their longitudinal direction, each extend at an angle relative to the axis of rotation of the rotor. It has been found that it is advantageous to have such an angle fixed in the range of -45° to +45° relative to the axis of rotation.

[0023] The present invention is also implemented by an extruder having an extruder mixer of the above-described type and having an extrusion screw supported in a screw housing of the extruder and connected to a worm drive of the extruder. The extruder according to the present invention can be further developed in a corresponding manner by combining the features described for the extruder mixer. It has been found that it is advantageous for the rotor to be at least partially arranged in a volume defined by the screw housing. It has been found that it is advantageous for the rotor to be arranged primarily inside the screw housing with respect to its rotor length in the axial direction. In a particularly preferred embodiment, the stator, the rotor and the screw housing are arranged coaxially relative to each other.

[0024] In a particularly preferred embodiment, the worm drive is rotationally coupled to the rotor of the extruder mixer. In other words, the rotation of the worm drive preferably results in the rotation of the rotor of the extruder mixer.

[0025] In another particularly preferred embodiment, the extruder has an extruder head. It has been found that it is advantageous to flange the screw housing on the extruder head. In a particularly preferred embodiment, the stator of the extruder mixer is arranged in a rotationally fixed manner relative to the extruder head. The stator can be screwed to the extruder head. It has been found that it is advantageous to construct the extrusion screw integrally with the rotor. In another particularly preferred embodiment, the worm drive is arranged on the side of the screw housing facing away from the extruder head. In another particularly preferred embodiment, the extruder has a rotor drive that can be operated independently of the worm drive. It has been found that it is advantageous for the rotor drive to be rotationally coupled to the rotor of the extruder mixer. It has been found that it is advantageous for the worm drive to be arranged on one side of the screw housing. Alternatively, the worm drive can be arranged on one side of the rotor of the extruder mixer.

[0026] Other advantages will become apparent from the following description of the drawings. In the drawings, various exemplary embodiments of the invention are shown. The drawings, the description and the claims contain multiple features in combination. A person skilled in the art will also advantageously consider these features individually and combine them to form other advantageous combinations. In the drawings, identical and equivalent parts are given the same reference numerals. In the drawings:

[0027] Figure 1 A first preferred exemplary embodiment of an extruder mixer is shown;

[0028] Figure 2 A first preferred exemplary embodiment of an extruder is shown;

[0029] Figure 3 A second preferred exemplary embodiment of an extruder is shown; and

[0030] Figure 4 A third preferred exemplary embodiment of an extruder is shown;

[0031] Figure 5 A preferred exemplary embodiment of an extruder according to the present invention is shown;

[0032] Figure 6 A preferred exemplary embodiment of a rotor cage is shown;

[0033] Figure 7A preferred exemplary embodiment of a stator is shown; and

[0034] Figure 8 Shows Figure 6 The rotor cage and Figure 7 stator components.

[0035] A first preferred exemplary embodiment of the extruder mixer 10 is Figure 1 . The extruder mixer 10 is provided with a stator 1 and a rotor 3, which is arranged coaxially with respect to the stator 1. The rotor 3 is rotatably supported with respect to the stator 3. During operation, the rotor 3 rotates about the rotation axis R. The stator 1 has a plurality of grooves 5, and the rotor 3 has a plurality of holes 7. At least one groove 5 overlaps with at least one hole 7.

[0036] The stator 1 is at least partially arranged in a volume RV defined by the rotor 3. Figure 1 As can be seen in FIG. 1 , the stator shaft 6 of the stator 3 is mainly located in the rotor cage 4 of the rotor 3 with respect to the axial direction AR. The stator shaft 6 is particularly intended to be understood as a region of the stator 3 in which a plurality of grooves 5 are formed. The stator 3 comprises a stator shaft 6 and a stator head 8 formed integrally with the stator 6. The rotor cage 4 is particularly intended to be understood as a region of the rotor 3 in which a plurality of holes 7 are formed.

[0037] like Figure 1 It can also be seen that the holes 7 of the rotor 3 are arranged in a plurality of hole rows RD1, RD2, etc. The hole rows RD1, RD2 each extend in the axial direction AR and are arranged on the rotor 3 in a uniform manner and spaced apart from each other along the circumferential direction U of the rotor 3. The grooves 5 of the stator 1 are arranged in a plurality of groove rows RA1, RA2, etc. The groove rows RA1, RA2 each extend in the axial direction AR and are arranged on the stator 1 in a uniform manner and spaced apart from each other along the circumferential direction of the stator 1.

[0038] The stator 1 also has an axial hole 2 (see also Figure 2 ), the fluid can be introduced into the rotor 3 via the axial hole 2.

[0039] The first exemplary embodiment of the extruder 100 is Figure 2 The extruder 100 has a Figure 1 The extruder mixer 10 of the exemplary embodiment of the present invention is shown in FIG. Figure 2As can be seen in the figure, the extruder 100 is provided with an extrusion screw 30, which is supported in a screw housing 20 of the extruder 100. The extrusion screw 30 is coupled to a worm drive 40 of the extruder 100 so that the extrusion screw 30 can be rotated about a rotation axis R. The screw drive 40 is arranged on a side of the screw housing 20 facing away from the extruder head 50.

[0040] The extruder 100 has an extruder head 50, to which the screw housing 30 is flange-mounted. The stator head 8 of the stator 1 of the extruder mixer 10 is screwed to the extruder head 50 and is therefore arranged in a rotationally fixed manner relative to the extruder head 50. The term "extruder head" as a term includes the fact that this component is located at the head end of the extruder with the described function and preferably receives measuring devices (e.g. pressure and temperature sensors) for the physical description of the extruded fluid / polymer.

[0041] The worm drive 30 itself is rotationally coupled to the rotor 3 of the extruder mixer 10 so that the rotor 3 can be rotated about an axis of rotation R. In the exemplary embodiment shown in this example, the extrusion screw 30 is rotationally coupled to the rotor 3 of the extruder mixer 10 so that the worm drive 40 drives the extrusion screw 30 and the rotor 3 in rotation.

[0042] exist Figure 2 The axial bore 2 can be clearly seen in FIG. 1 , which extends coaxially in the stator 1 relative to the rotation axis R. A fluid, for example a color component, can be introduced into the rotor 3 via the axial bore 2 .

[0043] The extruder head 50 receives a single-component or multi-component stator 1 centrally. The stator 1 integrates the functions of a fixed stator head 8, an axial hole 2 (or multiple holes, if applicable) for connecting and supplying the components to be mixed in the mixing space formed by the rotor 3. In the stator shaft 6 in the form of a hole in the outlet area, a mechanical or hydraulic control device for temporarily closing and / or throttling the supplied fluid can be provided. The fluid flow discharged from the axial hole 2 is pressed into the central concentric mixer cavity located in the head and is evenly distributed in a radial manner on the circumference and the first hole 4. The stator 1 in the region of the extruder head 8 further contains the groove 5 (stator cavity) described, which is arranged to correspond to the hole 7 (rotor hole) of the rotor 3. The extruder head 50 and the filler 1 are both provided with holes for receiving sensors. Heating can be performed via both the fluid medium and via contact and convection heating systems. Correct operation enables the counterclockwise and clockwise rotation of the rotor 3 and the connected extrusion screw 30 around the central stator 1. The stator 1 may in turn be connected together from a plurality of parts, which preferably enables a simple changing / exchange of the grooves 5 (mixer chambers).

[0044] A second exemplary embodiment of the extruder 200 is Figure 3 The extruder 200 has a Figure 1 The extruder mixer 10 of the exemplary embodiment of the present invention is provided with an extrusion screw 30, which is supported in a screw housing 20 of the extruder 200. The extrusion screw 30 is coupled to a worm drive 40 of the extruder 200 so that the extrusion screw 30 can be rotated about a rotation axis R. Figure 2 Compared to the exemplary embodiment of Figure 3 In the extruder 200 , a separate or extended screw housing 21 with an extrusion screw 31 and an additional worm drive 41 (which together can be referred to as a feed unit) is arranged in the stator head 8 on the side facing away from the rotor 3 .

[0045] like Figure 3As can be seen in the figure, the extruder 200 has a second drive 41 that can be operated independently of the worm drive 40 (or rotor drive 60). The drive 41 is coupled in rotation to the extrusion screw 31, which rotates in a temperature-controllable barrel, which is flanged or integrally constructed with the barrel of the extruder mixer 100 and conveys a fluid or produces a polymer melt. The second drive 41 is arranged on the opposite side of the worm drive 40 (or rotor drive 60) with respect to the stator head 8, and uses both the barrel 21 and the stator 8 as surrounding barrels. In the outlet area of ​​the stator head 6, a mechanically or hydraulically operated functional unit X is positioned on the rotating extrusion screw 31, or a throttling effect and / or closing of the outlet can be achieved by correspondingly shaping the outlet area and the axial positionability of the rotating extrusion screw 31. The temperature control of the barrels 20 and 21 can be performed both by the fluid medium and by contact and convection heating systems (and combinations thereof). Correct operation enables counterclockwise and clockwise rotation of the screw 21 connected in the central filling 8 which additionally has the described cavity (stator cavity) 5 arranged to correspond to the hole 7 of the rotor (rotor hole).

[0046] A mechanically or hydraulically operated functional unit X located in the outlet region of the stator shaft 6 can alternatively be coupled to the worm drive 40 (or rotor drive 60). Special forms of the functional unit X are in the form of a throttling unit X, a damping unit X2 or a displacement pump X3.

[0047] A third exemplary embodiment of the extruder 300 is Figure 4 The extruder 300 has a Figure 1 An exemplary embodiment of an extruder mixer 10. Figure 3 As in the exemplary embodiment of Figure 4 In the extruder 300 , the screw housing 20 , the extrusion screw 30 and the worm drive 40 (which may be collectively referred to as a feed unit) are arranged on a side of the stator head 8 facing away from the rotor 3 .

[0048] and Figure 3 Compared to the exemplary embodiment, Figure 4 The extruder 100 has only one drive in the form of a worm drive 40. The worm drive 40 is arranged on one side of the screw housing 20. Alternatively, instead of the worm drive 40, a rotor drive 60 can be arranged on one side of the rotor 3 of the extruder mixer 10.

[0049] The rotational coupling of the worm drive 40 to the rotor 3 of the extruder mixer 10 is achieved via a coupling rod which extends coaxially with respect to the axis of rotation R through the stator 1 .

[0050] Correct operation is achieved by supplying volume flows of different polymers and / or fluids via a screw conveying system and / or feed holes in the extruder mixer. Figure 2 The minimum case is shown for polymer supply via screw V0 and pressure feed of a second volume flow V1 in the extruder mixer 10. The outlet opening discharges the mixture as volume flow VM out of the extruder mixer 10. The number of pressure feeds of additional volume flows VX is unlimited.

[0051] Figure 3 The diagram in shows the correct operation of pressure feeding of two volume flows V0, V1 and a third volume flow V2 in the extruder mixer 10 supplied by separately driven screws / rotors. The outlet opening discharges the mixture as a volume flow VM out of the extruder mixer 10. The number of pressure feeds of additional volume flows VX is unlimited.

[0052] Figure 4 The diagram in shows the correct operation via the pressure feed of the volume flow V1 supplied by the coupled driven screw / rotor and the second volume flow V2 in the extruder mixer 10. The outlet opening discharges the mixture as the volume flow VM out of the extruder mixer 10. The number of pressure feeds of the additional volume flow VX is unlimited.

[0053] A fourth exemplary embodiment of an extruder 200 according to the present invention is Figure 5 Shown in. Figure 5 An exemplary embodiment of the invention is similar in structure to Figure 2 An exemplary embodiment of Figure 5 During correct operation of the extruder 200, the supply of the volume flow V0 does not take place and cannot take place at the worm drive. During correct operation, the supply of the volume flows takes place by supplying the volume flows V0, V1 and VX to the extruder head 50 (that is, perpendicular to the axis of rotation R of the rotor 3). During correct operation, the volume flow VM (volume flow "mixture") exits the stator 1 through the axial bore 2.

[0054] Figure 6 A preferred exemplary embodiment of a rotor 3 is shown, which has a rotor cage 4 with a large number of holes 7. Figures 1 to 5 Compared with the exemplary embodiment in which the hole 7 is constructed to be elongated in the longitudinal direction and its longitudinal direction each extends parallel to the rotation axis R of the rotor 3, the longitudinal direction L7 of the hole 7 does not extend parallel to the rotation axis R of the rotor 3.

[0055] Figure 7 A preferred exemplary embodiment of a stator 1 is shown, which has a large number of grooves 5. Figures 1 to 5Compared with the exemplary embodiment in which the grooves are constructed to be elongated in the longitudinal direction and their longitudinal directions each extend parallel to the rotation axis R of the rotor 3, the longitudinal direction L5 of the groove 5 does not extend parallel to the rotation axis R of the rotor 3 (not shown here).

[0056] Figure 8 Finally, the extruder mixer is shown as Figure 6 The rotor 3 and Figure 7 The components of the stator 1. Figure 8 It can be seen in FIG. 5 that the longitudinal direction L7 of the holes 7 does not extend parallel to the longitudinal direction L5 of the grooves 5. As a result, the mixing behavior of the extruder mixer can be influenced in a positive manner.

[0057] Reference numerals list

[0058] 1 Stator

[0059] 2 Axial hole

[0060] 3 Rotor

[0061] 4 Rotor cage

[0062] 5 Grooves

[0063] 6 Stator shaft

[0064] 7 holes

[0065] 8 Stator head

[0066] 10 Extruder mixer

[0067] 20 screw housing

[0068] 21 screw housing

[0069] 30 Extrusion screw

[0070] 31 Extrusion screw

[0071] 40 Worm drive

[0072] 41 Worm drive

[0073] 50 Extruder Head

[0074] 60 rotor drive

[0075] 100 Extruder with extruder mixer

[0076] 200 Extruders / Mixers in stand-alone mode

[0077] 300 Extruder / Mixer in Connected State

[0078] AR Axial Direction

[0079] Longitudinal direction of L5 groove

[0080] Longitudinal direction of L7 foramen

[0081] RRotation axis

[0082] RA groove row

[0083] RD hole row

[0084] RV rotor volume

[0085] T Temperature Control

[0086] U Circumferential

[0087] K join

[0088] X functional unit (can be connected)

[0089] X1 Functional unit for throttling

[0090] X2 functional unit for blocking

[0091] X3 functional unit for pumping

[0092] V0 volume flow "0"

[0093] V1 volume flow "1"

[0094] V2 Volume flow "2"

[0095] VX Volume Flow "X"

[0096] VM volume flow "mixture

Claims

1. An extruder mixer (10), comprising a stator (1) and a rotor (3), wherein the rotor (3) is arranged coaxially with respect to the stator (1), wherein: The rotor (3) is supported in a rotatable manner relative to the stator (1), wherein the stator (1) is at least partially arranged in a volume (RV) defined by the rotor (3), characterized in that the rotor (3) has a rotor cage (4), the rotor cage (4) has a large number of holes (7), wherein the holes (7) are constructed to be elongated in a longitudinal direction (L7) and their longitudinal directions (L7) each extend obliquely relative to the rotation axis (R) of the rotor (3).

2. The extruder mixer (10) according to claim 1, characterized in that The stator (1) has at least one groove (5) and the rotor (3) has at least one hole (7), wherein during operation of the extruder mixer (10), the groove and the hole at least partially overlap.

3. The extruder mixer (10) according to claim 1 or 2, characterized in that The stator (1) has an axial hole (2) through which a fluid can be introduced into the rotor (3).

4. An extruder (100) having an extruder mixer (10), wherein: The extruder mixer (10) comprises a stator (1) and a rotor (3), the rotor (3) being arranged coaxially relative to the stator (1), wherein the rotor (3) is supported in a rotatable manner relative to the stator (3), wherein the stator (1) is at least partially arranged in a volume (RV) defined by the rotor (3), and the rotor (3) comprises a rotor cage (4), wherein the rotor cage (4) has a large number of holes (7), wherein the holes (7) are constructed to be elongated in a longitudinal direction (L7) and their longitudinal directions (L7) each extend obliquely relative to the rotation axis (R) of the rotor (3), and the extruder mixer comprises an extrusion screw (30), which is supported in a screw housing (20) of the extruder (100) and is connected to a worm drive (40) of the extruder (100).

5. The extruder (100) according to claim 4, characterized in that The extruder mixer (10) is constructed according to claim 2 or 3.

6. The extruder (100) according to claim 4 or 5, characterized in that The extruder (100) has an extruder head (50), wherein the screw housing (30) is flange-mounted on the extruder head (50) and the stator (1) of the extruder mixer (10) is arranged in a rotationally fixed manner relative to the extruder head (50).

7. The extruder (100) according to claim 6, characterized in that The extrusion screw (30) is constructed integrally with the rotor (3).

8. The extruder (100) according to claim 7, characterized in that The worm drive (40) is arranged on the side of the screw housing (20) facing away from the extruder head (50).

9. The extruder (100) according to any one of claims 4 to 6, characterized in that The worm drive (40) is arranged on the side of the screw housing (20).

10. The extruder (100) according to any one of claims 4 to 6, characterized in that The worm drive (40) is arranged on one side of the rotor (3) of the extruder mixer (10).

11. The extruder (200) according to claim 4, characterized in that The extruder (200) has a rotor drive (60) which can be operated independently of the worm drive (40), wherein the rotor drive (60) is rotationally coupled to the rotor (3) of the extruder mixer (10).

12. The extruder (200) according to claim 9, characterized in that The worm drive (40) or a separate rotor drive (60) of the extruder is rotationally coupled to the rotor (3) of the extruder mixer (10), and inside the stator head (8) a further worm drive (41) with an extrusion screw (31) acts centrally relative to the axis of rotation (R).

13. The extruder (200) according to claim 9, characterized in that The worm drive (41) with the worm drive (31) acts centrally relative to the axis of rotation (R) and can be positioned in an axial direction (AR).

14. The extruder (200) according to claim 9, characterized in that The worm drive (40) or a separate rotor drive (60) of the extruder is coupled (K) to a functional unit (X) inside the stator (1).

15. The extruder (200) according to claim 12, characterized in that The functional unit (X) has the function of a throttle (X1) inside the stator (1).

16. The extruder (200) according to claim 12, characterized in that The functional unit (X) has the function of a blocking device (X2) inside the stator (1).

17. The extruder (200) according to claim 12, characterized in that The functional unit (X) has the function of a positive displacement pump (X3) inside the stator (1).

18. An extruder, comprising an extruder mixer (10), the extruder mixer (10) comprising a stator (1) and a rotor (3), the rotor (3) being arranged coaxially with respect to the stator (1), wherein: The rotor (3) is supported in a rotatable manner relative to the stator (3), wherein the stator (1) is at least partially arranged in a volume (RV) defined by the rotor (3), in particular as described in any one of claims 4 to 17, wherein the extruder has an extruder head (50), the extruder head (50) having a supply part, through which a volume flow is supplied to the extruder.

19. The extruder according to claim 18, wherein The supply portion is configured to be perpendicular to the rotation axis (R) of the rotor (3).

20. The extruder (300) according to claim 4, characterized in that The extruder (300) has only a worm drive (40) or a rotor drive (60), wherein the rotor and the extrusion screw are rotationally coupled.

21. The extruder (300) according to claim 20, characterized in that The extruder (300) positions the worm drive (40) or rotor drive (60) at one of the two ends of the rotationally coupled unit.

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