EP2011562A1 - Mixer insert, static mixing device and method for manufacturing a static mixer insert - Google Patents

Abstract

The insert (2) has a set of mixing elements (4, 5) arranged adjacent to each other along a longitudinal axis (L), and two partial mixer insert units. Each insert unit has a longitudinal bar (3a, 3b) running towards the axis, where the bar is arranged at the mixing elements and is firmly connected with the mixing elements. The mixing elements are spaced towards the axis by forming spaces (Za, Zb). The spaces are designed longitudinally such that the mixing elements are inserted into the spaces to arrange the insert units and mixing elements adjacent to each other along the common axis. Independent claims are also included for the following: (1) a method for manufacturing a mixer insert (2) a method for assembling a mixer insert.

Description

The invention relates to a mixer insert for a static mixer according to the preamble of claim 1. The invention further relates to a static mixer according to the preamble of claim 15. The invention further relates to a method for producing a mixer insert according to the preamble of claim 16.

The publication CH 642 564 discloses a static mixing device consisting of a tubular housing with mixing elements arranged therein. The mixing elements consist of intersecting webs, which extend at an angle with respect to the course of the axis of the tubular housing. The static mixing device comprises a plurality of mixing elements, which are arranged one behind the other in the tubular housing, and mutually rotated with respect to the direction of the axis by 90 °. This mixing device has the disadvantages that the production of the mixing elements is relatively complicated and expensive. In the production of the mixing elements usually results in a relatively large committee of unusable mixing elements. In addition, the filling of the tube-like housing with the mixing elements is very time-consuming, and it is particularly difficult to ensure that the mutually adjacent mixing elements are arranged rotated by 90 ° and remain in this position, especially when the mixer is moved during assembly. In addition, it is difficult to assemble mixers with small mixing element diameters because the difficulty and time required for assembly usually increases with decreasing mixing element diameter. The known mixing elements have the further disadvantage that the mixing elements in the course of the static mixer due to the pressure drop generated by the flow are increasingly exposed to greater forces, which can damage certain mixing elements and / or webs.

It is an object of the present invention to propose a more economically advantageous mixer insert, a more advantageous static mixer and a more advantageous method for producing a mixer insert.

This object is achieved with a mixer insert having the features of claim 1. The dependent claims 2 to 14 relate to further, advantageously designed mixer inserts. The object is further achieved with a static mixer having the features of claim 15 and a method for producing a mixer insert comprising the features of claim 16.

The object is achieved in particular with a mixer insert for a static mixer, comprising a plurality of mixing elements arranged one after the other along a longitudinal axis, which consist of intersecting webs, wherein the mixer insert consists of at least two sub-mixer inserts, each sub-mixer insert comprises a longitudinal web extending in the longitudinal axis and mixing elements, wherein the longitudinal web is arranged peripherally to the mixing elements and fixedly connected to the mixing elements, wherein the mixing elements the first sub-mixer insert are spaced in the direction of the longitudinal axis with the formation of intermediate spaces, and wherein the mixing elements of the second sub-mixer insert are spaced in the direction of the longitudinal axis with the formation of gaps, wherein the interstices are at least designed so long that the mixing elements of the second sub-mixer insert in the interstices of the first sub-mixer insert are insertable, and that the mixing elements of the first sub-mixer insert are insertable into the interstices of the second sub-mixer insert to the sub-mixer inserts and d Heen mixing elements along a common longitudinal axis successively to arrange.

The mixer insert according to the invention has the advantage that, starting from a plurality of predetermined sub-mixer inserts, it can be assembled very quickly by connecting the sub-mixer inserts accordingly. In the simplest embodiment, the mixer insert consists of two sub-mixer inserts, wherein the mixing elements of the first sub-mixer insert are introduced into the interspaces of the second sub-mixer insert, and vice versa, by introducing the mixing elements of the second sub-mixer insert into the interspaces of the first sub-mixer insert. Since the mixing elements of each sub-mixer insert are fixedly connected to a longitudinal web, the position of the mixing elements is each Partial mixer insert predetermined, so that the sub-mixer inserts can be easily assembled to the mixing insert. A mixer insert preferably comprises four to sixteen mixing elements arranged one behind the other in the longitudinal direction and can be assembled, for example, with two, four, six or eight partial mixer inserts. Such a mixer insert can be assembled in a very short time. In addition, it is ensured that all mixing elements are mutually rotated by the same angle with respect to the longitudinal axis, usually by 90 degrees, and even in a movement of the mixer during assembly in the situation does not change.

The sub-mixer inserts are preferably made of plastic or metal and are preferably produced by injection molding, precision casting (lost wax) or die casting. The mixing elements have intersecting webs, which is why expensive, very expensive, multi-part tools with slide inserts are required to produce the mixing elements with interlocking webs to produce the sub-mixer inserts in a possible manufacturing process. In a particularly advantageous embodiment, therefore, care is taken that the sub-mixer inserts are designed geometrically such that they are very inexpensive to produce by injection molding. Cost-effective injection molding is achieved, in particular, by using a simple "open-close tool", whereby a "open-close tool" is understood to be a tool which only has to be opened and closed to produce the sub-mixer insert by means of a linear movement , With such simple tools, production times can generally also be short cycle times and thus high productivity be achieved. In other words, this means that the entire mixer insert is subdivided into such geometrically configured sub-mixer inserts, that the individual sub-mixer inserts are very inexpensive to produce, in particular by injection molding with an "open-to-tool". In an advantageous embodiment, each sub-mixer insert forms only one sub-mixing element, wherein the joining of several sub-mixer inserts from the respective sub-mixing elements forms the complete mixing element. This makes it possible by combination or by assembling the cost-effectively produced sub-mixing elements arbitrarily complex designed mixing elements or mixer inserts with intersecting webs produce. Such a mixer insert may consist of a plurality of sub-mixing elements, which are inexpensive to produce by injection molding. Despite this possible variety of sub-mixing elements of the mixer insert is very easy to assemble, because a plurality of sub-mixing elements are firmly connected to the longitudinal web, and so form a sub-mixer insert, the mutual distance and the orientation of the sub-mixing elements is determined by the course of the longitudinal web. A mixer insert preferably consists of a total of two, four, six or eight sub-mixing elements, and thus consists of a small number of items that need to be assembled.

The mixer insert according to the invention can thus be assembled very easily from cost-effectively manufacturable partial mixer inserts, wherein the mixing elements usually have a multiplicity of intersecting webs. The inventive mixer insert has the advantageous mixing behavior of a static Mischers with intersecting webs, but is much cheaper to produce than previously known static mixer with intersecting webs. The mixer insert according to the invention is therefore particularly suitable as a disposable mixer.

The longitudinal webs of the sub-mixer inserts also have the advantage that these derive longitudinal forces, and in particular transferred to an outer housing, so that the forces acting in the longitudinal direction must not be transmitted solely from the mixing elements, as is known in the prior art, but partially or majority of the longitudinal webs are taken. This results in the advantages that the mixing elements or their webs can be formed with lower material thickness, which reduces the material and manufacturing costs that the void volume fraction is increased in the static mixer, since the mixer insert has a lower volume of material, and thereby the mixer use a smaller Has flow resistance.

Fig. 1

eine Seitenansicht eines ersten Teilmischereinsatzes;

Fig. 2

eine Seitenansicht eines zweiten Teilmischereinsatzes;

Fig. 3

ein zusammengestellter Mischereinsatz;

Fig. 4

eine Darstellung der Rückseite des in Figur 3 dargestellten Mischereinsatzes;

Fig. 5

eine Frontansicht des in Figur 1 dargestellten Teilmischereinsatzes aus Richtung A;

Fig. 6

eine Frontansicht des in Figur 2 dargestellten Teilmischereinsatzes aus Richtung B;

Fig. 7

eine Seitenansicht von zwei Teilmischereinsätzen;

Fig. 8

eine Frontansicht des in Figur 7 dargestellten Teilmischereinsatzes aus Richtung C;

Fig. 9

eine Detailansicht des in Figur 7 dargestellten Teilmischereinsatzes;

Fig. 10

eine Draufsicht auf die in Figur 9 dargestellte Detailansicht eines Teilmischereinsatzes;

Fig. 11

eine dreidimensionale Detailansicht der in Figur 7 dargestellten Teilmischereinsätze;

Fig. 12

einen noch nicht zusammengestellten Mischereinsatz umfassend vier Teilmischereinsätze;

Fig. 13

eine Frontansicht des in Figur 12 dargestellten Teilmischereinsatzes aus Richtung D;

Fig. 14

eine dreidimensionale Detailansicht der in Figur 12 dargestellten Teilmischereinsätze;

Fig. 15

eine Frontansicht eines Mischereinsatzes umfassend drei übereinander angeordnete Teilmischereinsätze;

Fig. 16

eine dreidimensionale Detailansicht von zwei Teilmischereinsätzen aufweisend Einraststellen;

Fig. 17

schematisch ein Ausführungsbeispiel einer möglichen Anordnung von Mischelementen im Mischereinsatz;

Fig. 18

schematisch ein Ausführungsbeispiel einer weiteren möglichen Anordnung von Mischelementen im Mischereinsatz;

The invention will be explained in more detail with reference to embodiments. The figures show:

Fig. 1

a side view of a first part mixer insert;

Fig. 2

a side view of a second sub-mixer insert;

Fig. 3

a composite mixer insert;

Fig. 4

a representation of the back of the in FIG. 3 illustrated mixer insert;

Fig. 5

a front view of the in FIG. 1 illustrated sub-mixer insert from direction A;

Fig. 6

a front view of the in FIG. 2 illustrated sub-mixer insert from direction B;

Fig. 7

a side view of two sub-mixer inserts;

Fig. 8

a front view of the in FIG. 7 illustrated sub-mixer insert from direction C;

Fig. 9

a detailed view of the in FIG. 7 illustrated sub-mixer insert;

Fig. 10

a top view of the in FIG. 9 illustrated detail view of a sub-mixer insert;

Fig. 11

a three-dimensional detail view of in FIG. 7 shown sub-mixer inserts;

Fig. 12

a not yet assembled mixer insert comprising four sub-mixer inserts;

Fig. 13

a front view of the in FIG. 12 shown sub-mixer insert from direction D;

Fig. 14

a three-dimensional detail view of in FIG. 12 shown sub-mixer inserts;

Fig. 15

a front view of a mixer insert comprising three stacked sub-mixer inserts;

Fig. 16

a three-dimensional detail view of two sub-mixer inserts having latching points;

Fig. 17

schematically an embodiment of a possible arrangement of mixing elements in the mixer insert;

Fig. 18

schematically an embodiment of another possible arrangement of mixing elements in the mixer insert;

FIG. 1 shows a side view of a partial view of a first sub-mixer insert 2a comprising a longitudinal ridge L extending in the longitudinal direction 3a with four visible, each spaced over a respective space Za arranged Mixing elements 4. The mixing elements 4 have mutually parallel base webs 6,6a, 6b and mutually parallel additional webs 7,7a, 7b, wherein the base webs 6,6a, 6b and the additional webs 7,7a, 7b are crossed each other. A partial mixer insert usually has between two and ten mixing elements 4. The illustrated sub-mixer insert 2a could be made of plastic as an injection molding or of metal in a suitable casting process. For reasons of casting technology, the mixing elements 4 are connected in the illustrated arrangement to the longitudinal rib 3a, in order to produce the partial mixer insert 2a by injection molding with an "open-close" tool.

FIG. 2 shows in a further side view a partial view of a second sub-mixer insert 2b having a longitudinal web L extending in the longitudinal direction 3b with four visible, each spaced by a gap Zb mutually spaced mixing elements 5. In the illustrated embodiment, the first and the second sub-mixer insert 2a, 2b configured geometrically identical , If the second sub-mixer insert 2b will rotate by 90 degrees so that the longitudinal web 3b comes to lie down, the second sub-mixer insert 2b thus has the in FIG. 1 represented geometry or shape.

In FIG. 3 are the in FIGS. 1 and 2 shown sub-mixer inserts 2a, 2b are assembled to a mixer insert 2 by the mixing elements 4 of the first sub-mixer insert 2a are inserted into the interstices Zb of the second sub-mixer insert 2b, and vice versa, by the mixing elements 5 of the second sub-mixer insert 2b inserted into the interstices Za of the first sub-mixing insert 2a are, so all mixing elements 4,5 are arranged successively along a common longitudinal axis L and form the mixer insert 2. The rear side of the mixer insert 2, that is to say the mixer insert 2 turned through 180 degrees about the longitudinal axis L, is in FIG. 4 shown.

FIG. 5 shows the front side or the front side of the in FIG. 1 illustrated sub-mixer insert 2a from the direction A, wherein substantially the mixing element 4 and the longitudinal ridge 3a are visible. FIG. 6 shows the front side or the front side of the in FIG. 2 The mixing element 4 comprises a plurality of base webs 6, 6a, 6b, which are directly connected to the longitudinal web 3a. The mixing element 4 also comprises a plurality of additional webs 7, 7a, 7b, which are connected only to the base webs 6, 6a, 6b. The base and additional webs 6,6a, 6b, 7,7a, 7b have in the illustrated embodiment from the illustrated viewing direction A, B a circular outer contour. The mixing element 4 could also have a square, rectangular or polygonal, for example hexagonal, or an oval outer contour by the basic and additional webs 6,6a, 6b, 7,7a, 7b are designed accordingly. Only dashed lines are indicated in FIG. 5 a tube 11 or an outer housing 11, into which the mixer insert 2 is introduced so as to form the static mixer 1.

The in the Figures 1 and 2 shown sub-mixer inserts 2a, 2b can be further subdivided in, for example, in which the sub-mixer insert 2 as in FIG. 7 shown, is bisected in the direction of the longitudinal axis L, so that two sub-mixer inserts 2c, 2d, arise, each sub-mixer insert 2c, 2d a sub-mixing element 5a, 5b form, so that only the two adjoining sub-mixer inserts 2c, 2d, the in FIG. 2 Forming mixing element 5 shown several times.

FIG. 8 shows the front side or the front side of the two in FIG. 7 Partial mixer inserts 2c, 2d shown from the viewing direction C, wherein substantially the longitudinal webs 3c, 3d, the base webs 6,6b connected thereto and the additional webs 7a, 7b connected to the base webs 6,6b and the sub-mixing elements 5a, 5b formed thereby can be seen. A partial mixing element 5a of the sub-mixer insert 2c is in FIG. 9 shown in three dimensions. The sub-mixing element 5a has mutually parallel base webs 6,6a, 6b and mutually parallel additional webs 7,7a, 7b, wherein the base webs 6,6a, 6b and the additional webs 7,7a, 7b crossed each other and at all intersections firmly together are connected. Some of the crossing points are marked with the reference numeral 8. The base webs 6,6a are firmly connected to the longitudinal web 3c. The additional webs 7,7a, 7b are connected only via the intersections with the base webs 6,6a, 6b. The longitudinal web 3 c has, on the outside, as shown on the right at the end of the longitudinal web 3 c, a rounded surface. FIG. 10 shows a plan view of the in FIG. 9 illustrated sub-mixing element 5a. All base webs 6, 6a, 6b and additional webs 7, 7a, 7b have parallel side faces extending vertically to the viewing plane. The sub-mixing element 5a is thus injection molding technology very simple and inexpensive to produce with an "open-to-tool". In addition, the sub-mixing elements 5a are arranged on the longitudinal web 3c, and the longitudinal web 3c is designed to extend in such a manner that the entire sub-blender insert 2c, comprising the longitudinal web 3c and a plurality of spaced apart in the longitudinal direction L. Partial mixing elements 5a, injection molding technology is simple and inexpensive to produce with a cost-effective to produce "on-to-tool".

The in FIG. 7 Sub-mixer insert 2d shown below is of geometrically identical design to the sub-mixer insert 2c shown above, wherein the lower sub-mixer insert 2d is only rotated 180 degrees with respect to the upper sub-mixer insert 2c. This means that thus only a single injection mold is required to produce the geometrically identical sub-mixer inserts 2c, 2d. By joining two sub-mixer inserts 2c, 2d, the in FIG. 2 illustrated sub-mixer insert are created. In addition, by joining two sub-mixer inserts 2c, 2d, the in FIG. 1 illustrated sub-mixer insert are created. Therefore, in the FIGS. 3 and 4 shown mixer insert 2 by four identical, in the FIG. 7 shown sub-mixer inserts 2c and 2d are compiled. It suffices thus a single injection mold for a single geometry of a sub-mixer insert to the in the FIGS. 3 and 4 assembled and trained mixer insert 2. Therefore, it is possible to produce the in itself very demanding mixer insert 2, comprising a plurality of mutually intersecting webs, both cost-effective and quick and easy to assemble and insert into the tube 11 of the static mixer 1.

Stacked submersible inserts 2c, 2d can not only be arranged as shown in FIG FIG. 7 be arranged, but for example also as in FIG. 11 represented such that in Lengthwise L on each side of a longitudinal web 3c, 3d extends, which has the advantage that the forces acting in the longitudinal direction L on the webs 6,6a, 6b, 7,7a, 7b forces can be dissipated more evenly distributed.

The FIGS. 12 and 13 show the assembling of a mixer insert 2 to the in the FIGS. 3 and 4 illustrated geometric shape. The in the FIGS. 12 and 13 shown mixer insert 2 consists of four sub-mixer inserts 2a, 2b, 2c, 2d. FIG. 13 shows an end view of FIG. 12 from the viewing direction D. In the illustrated state, the two sub-mixer inserts 2 a and 2 b are already joined together. As the next step, the sub-mixer insert 2c is inserted into the sub-mixer inserts 2a and 2b in the direction of movement 10b, and thereafter inserted as the last step, the sub-mixer insert 2d in the direction of movement 10b in the sub-mixer inserts 2a, 2b and 2c, so that the entire mixer insert 2 is assembled. FIG. 14 shows the in the FIGS. 12 and 13 shown sub-mixer inserts 2a, 2b, 2c, 2d in a perspective view in a position shortly before assembling.

FIG. 15 shows the front view of another embodiment of a mixer insert 2 and the front view of a mixing elements 4 of the in FIG. 12 perspective view D. In contrast to the in the FIGS. 12 and 13 The embodiment shown in FIG FIG. 15 illustrated mixing element 4 formed by three superimposed sub-mixer inserts 2a, 2b, 2c, each having a longitudinal ridge 3a, 3b, 3c, to which, similar to, for example, in FIG. 9 represented, base webs 6,6a, 6b and additional webs 7,7a, 7b are arranged. These bridges 6,6a, 6b, 7,7a, 7b and the longitudinal webs 3a, 3b, 3c are configured and arranged such that the mixing element 4 formed therefrom has a circular outer cross section, the webs 6, 6a, 6b, 7, 7a, 7b advantageously have parallel side surfaces, such as in FIG. 10 represented, so that the sub-mixer inserts 2a, 2b, 2c can be produced by injection molding with a simple "open-to-tool". Unlike in the FIGS. 12 and 13 The embodiment shown in FIG FIG. 15 shown mixing element 4 two additional rows of webs 6,6a, 6b, 7.7a.7b, which may have a better mixing effect. The mixing element 4 could also be formed by more than three sub-mixer inserts 2a, 2b, 2c arranged one above the other, for example by four, five, six or more sub-mixer inserts 2a, 2b, 2c. Such a mixing element 4 could therefore also have a corresponding plurality of webs 6, 6a, 6b, 7, 7a, 7b lying next to one another on the end side. This structure of longitudinally L successive and spaced intermediate mixing elements 4 could, for example, with the in FIG. 2 illustrated sub-mixer insert 2b with mixing elements 5 or with the in FIG. 7 shown sub-mixer insert 2c and 2d, forming the mixer elements 5, to be assembled. Of course, the mixer elements 4 and 5 can also be created by the same number of sub-mixer inserts, as in the Figures 1 and 2 shown with a sub-mixer insert 2a, 2b, or as in FIG. 13 shown with two sub-mixer inserts 2a, 2b; 2c, 2d, or as in FIG. 15 only partially visible, each with three sub-mixer inserts 2a, 2b, 2c and not apparent sub-mixer inserts 2d, 2e, 2f. This in FIG. 15 shown mixing element 4 has a substantially cylindrical outer contour on, for example, in FIG. 2 in the direction L outer contour shown.

It may, as in FIG. 16 shown to be advantageous to provide the base webs 6,6a, 6b with recesses 9 or notches 9, which are arranged at the intersections, so that oppositely arranged crossing points of the base webs 6,6a, 6b engage with each other and thereby mutually support.

So far, only embodiments of sub-mixer inserts 2 a, 2 b, 2 c, 2 d have been shown, the mixing elements 4,5 in the longitudinal direction L are designed to be substantially as long or slightly shorter than the spaces Za, Zb, so that the mixing elements 4,5 in the interstices Za, For example, are insertable. The FIGS. 17 and 18 schematically show two sub-mixer inserts 2a, 2b with longitudinal webs 3a, 3b, on which mixing elements are arranged 4.5. As can be seen, the mixing elements 4, 5 may have different lengths in the longitudinal direction L, and may also have gaps Za, Za of different lengths, which are, however, adapted to one another in such a way that the sub-mixer inserts 2a, 2b can be brought together such that the mixing elements 4, 5 are thereafter arranged successively along a common longitudinal axis L.

It may prove to be advantageous basic and additional webs 6,6a, 6b, 7,7a, 7b, which are arranged to a longitudinal ridge 3a, 3b, 3c, 3d, slightly to cut at the periphery, so that, the sub-mixer insert 2a, 2b, as in FIG. 5 shown by dashed lines, has an opening 3e. In a mixer insert 2 inserted in the tube 11, the longitudinal web 3b comes into the opening 3e lie, so that the circular outer contour of the mixer insert 2 remains guaranteed. The opening 3e advantageously has substantially the same cross-sectional area as the longitudinal web 3b. This embodiment has the advantage that no or the smallest possible gap arises between the mixer insert 2 and the tube 11. In an advantageous embodiment, the cross-section of a mixer insert 2 inserted into the tube 11 has as possible no gap to the tube 11 towards. Such a cross-section, which is as gap-free as possible, prevents longitudinal flows in the region of the tube 11, and thus ensures good mixing of the fluid flowing in tube 11. This is particularly important if the fluids to be mixed have a very different viscosity, as can occur when mixing a high-viscosity and a low-viscosity fluid.

In a further advantageous embodiment, no such opening 3e is formed, wherein the webs 6,6a, 6b, 7,7a, 7b are configured so flexible, and for example made of plastic, that the webs 6,6a, 6b, 7,7a , 7b slightly distort where the longitudinal webs 3a, 3b, 3c, 3d are arranged to provide this space. The additional webs 7, 7a, 7b could also be designed such that they are connected at their tips, where possible, also with the respective longitudinal web 3a, 3b, 3c, 3d.

Claims (17)

Mixer insert (2) for a static mixer (1) comprising a plurality of along a longitudinal axis (L) successively arranged mixing elements (4,5), which consist of intersecting webs, characterized in that the mixer insert (2) of at least two sub-mixer inserts (2a, 2b), each sub-mixer insert (2a, 2b) extending in the direction of the longitudinal axis (L) extending longitudinal web (3a, 3b) and mixing elements (4,5), wherein the longitudinal web (3a, 3b) peripherally is arranged to the mixing elements (4,5) and is fixedly connected to the mixing elements (4,5), wherein the mixing elements (4) of the first part mixer insert (2a) in the direction of the longitudinal axis (L) spaced to form spaces (Za) are, and wherein the mixing elements (5) of the second sub-mixer insert (2b) in the direction of the longitudinal axis (L) to form spaces (Zb) are spaced, wherein the spaces (Za, Zb) are at least designed so long that the di e mixing elements (5) of the second sub-mixer insert (2b) in the interstices (Za) of the first sub-mixer insert (2a) are inserted, and that the mixing elements (4) of the first sub-mixer insert (2a) in the intermediate spaces (Zb) of the second sub-mixer insert (2b ) are insertable so as to successively arrange the sub-mixer inserts (2a, 2b) and their mixing elements (4,5) along a common longitudinal axis (L). Mixer insert (2) according to claim 1, characterized in that all intermediate spaces (Za, Zb) have the same length. Mixer insert (2) according to one of the preceding claims, characterized in that all mixing elements (4,5) have the same length. Mixer insert (2) according to one of the preceding claims, characterized in that all sub-mixer inserts (2a, 2b) are configured identically. Mixer insert (2) according to one of the preceding claims, characterized in that the mixer insert (2) has two sub-mixer inserts (2a, 2b), and that the two sub-mixer inserts (2a, 2b) with respect to the longitudinal axis (L) by an angle of 90 ° are arranged rotated. Mixer insert (2) according to one of claims 1 to 4, characterized in that the mixer insert (2) at least four sub-mixer inserts (2a, 2b, 2c, 2d), each sub-mixer insert (2a, 2b, 2c, 2d) from a longitudinal web (3a, 3b, 3c, 3d) and a plurality of spaced apart in the direction of the longitudinal axis (L), fixedly connected to the respective longitudinal web (3a, 3b, 3c, 3d) sub-mixing elements (4a, 4b, 4c, 5a, 5b, 5c), wherein in each case at least two sub-mixer inserts (2a, 2b) are so assembled that their sub-mixing elements (4a, 4b, 4c, 5a, 5b, 5) come to lie one above the other and the superimposed sub-mixing elements (4a, 4b, 4c, 5a, 5b, 5c) together form the mixing elements (4, 5). Mixer insert (2) according to claim 6, characterized in that the mixing elements (4,5) are designed such that they substantially fill an inner cross section of the static mixer (1), and an inner cross section from the group circular, square, rectangular, polygonal or oval. Mixer insert (2) according to claim 7, characterized in that in each case two sub-mixing elements (4a, 4b; 5a, 5b) arranged one above the other form a mixing element (4, 5) with a substantially cylindrical outer contour. Mixer insert (2) according to claim 8, characterized in that each sub-mixing elements (4a, 4b; 5a, 5b) have a semicircular side view. Mixer insert (2) according to claim 8, characterized in that in each case three sub-mixing elements (4a, 4b; 5a, 5b) arranged one above the other form a mixing element (4; 5) with a substantially cylindrical outer contour. Mixer insert (2) according to claim 9 or 10, characterized in that the mixing element (4; 5) or the sub-mixing element (4a, 4b, 5a, 5b) has a plurality of parallel base webs (6a), which with the longitudinal web (3a, 3b) and are transverse with respect to the longitudinal web (3a, 3b), and that the mixing element (4; 5) or the sub-mixing element (4a, 4b, 5a, 5b) has a plurality of parallel additional webs (7a), wherein the Additional webs (7a) are directly connected to the base webs (6a). Mixer insert (2) according to one of Claims 8 to 11, characterized in that each sub-mixer insert (2a, 2b, 2c, 2d) consists of a longitudinal web (3a, 3b, 3c, 3d) and sub-mixing elements (4a, 4b, 4c , 5a, 5b, 5c), each sub-mixing element (4a, 4b, 4c, 5a, 5b, 5c) having base webs (6a) and additional webs (7a) arranged in such a way that the sub-mixing elements (4a, 4b, 4c, 5a, 5b, 5c) can be produced by injection molding from thermoplastic or thermosetting plastics by means of a linearly movable "open-close-tool". Mixer insert (2) according to one of Claims 8 to 11, characterized in that each sub-mixer insert (2a, 2b, 2c, 2d) consists of a longitudinal web (3a, 3b, 3c, 3d) and sub-mixing elements (4a, 4b, 4c , 5a, 5b, 5c), each sub-mixing element (4a, 4b, 4c, 5a, 5b, 5c) having base webs (6a) arranged in this way and additional webs (7a), the sub-mixing elements (4a, 4b, 4c, 5a, 5b, 5c) can be produced by means of precision casting or die-casting as metal parts. Mixer insert (2) according to one of the preceding claims, characterized in that the webs (6, 6a, 6b, 7, 7a, 7b) have an opening (3e) which is arranged and configured in such a way that the longitudinal axis ( L) extending longitudinal web (3a, 3b) finds place in it. Static mixer (1) comprising a cylindrical container (3) and a mixer insert (2) arranged inside the container (3) according to one of the preceding claims. Method for producing a mixer insert (1) having a plurality of sub-mixer inserts (2a, 2b), each sub-mixer insert (2a, 2b) comprising a longitudinal web (3a, 3b) extending in the longitudinal direction, with mixing elements (4, 4) arranged thereon and spaced longitudinally , 5) according to any one of claims 1 to 12, characterized in that each sub-mixer insert (2a, 2b) is produced by injection molding of thermosetting or thermosetting plastics by means of a linearly movable "open-close tool". A method of assembling a mixer insert (2) for a static mixer (1) comprising at least two sub-mixer inserts (2a, 2b), each sub-mixer insert (2a, 2b) comprises a longitudinal web (3a, 3b) extending in the direction of the longitudinal axis (L) and mixing elements (4, 5), the longitudinal web (3a, 3b) being fixedly connected to the mixing elements (4, 5) the mixing elements (4) of the first partial mixer insert (2a) are spaced apart in the direction of the longitudinal axis (L) to form intermediate spaces (Za), and wherein the mixing elements (5) of the second partial mixer insert (2b) are formed in the direction of the longitudinal axis (L) of intermediate spaces (Zb) are spaced, wherein the intermediate spaces (Za, Zb) are at least designed so long that the mixing elements (5) of the second sub-mixer insert (2b) in the intermediate spaces (Za) of the first sub-mixer insert (2a) can be inserted the mixing elements (4) of the first partial mixer insert (2a) are introduced into the intermediate spaces (Zb) of the second partial mixer insert (2b), and wherein the mixing elements (5) of the second partial mixer insert (2b) into the intermediate spaces (Za) of the first partial mixing 2 (a) so that the sub-mixer inserts (2 a, 2 b) and their mixing elements (4, 5) are successively arranged along a common longitudinal axis (L).

Images