Mixer

Abstract

The present disclosure relates to a mixer for mixing pasty components, comprising a mixing case extending along a longitudinal axis and having at least one inlet, preferably two inlets, and an outlet, and comprising at least one mixing element received in the mixing case, which defines a plurality of chambers together with the mixing case, said chambers being arranged successively and/or adjacently along a flow path from the inlets to the outlet. The chambers are defined by transverse walls, each extending perpendicularly to the longitudinal axis, and four side walls that each extend parallel to the longitudinal axis, and adjacent chambers are interconnected by a flow by means of through-openings provided in the side walls, the mixing element comprising two strips forming side walls, which are connected by a web that forms other side walls and is perpendicularly arranged in relation to the strips, a first group of chambers having first through-openings arranged in the web, which extend up to a strip, and a second group of chambers comprising second through-openings positioned at a distance to at least one strip in the web.

Claims

1. A mixer for the mixing of pasty components, the mixer comprising: a mixing case extending along a longitudinal axis, the mixing case including at least one inlet and an outlet, wherein at least one mixing element is accommodated in the mixing case, wherein the mixing element, together with the mixing case, defines a plurality of chambers positioned along a flow path from the at least one inlet to the outlet behind and/or next to one another, wherein the plurality of chambers are restricted by a plurality of transverse walls, each extending transversely to the longitudinal axis, as well as by a plurality of lateral walls, which each extend in parallel to the longitudinal axis, and wherein adjacent chambers of the plurality of chambers are flow-connected with one another via through-openings provided in the plurality of lateral walls, wherein the mixing element has two strips that are connected by a web forming a lateral wall of the plurality of lateral walls and positioned perpendicularly to the two strips, wherein a first group of chambers has first through-openings positioned in the web and extend up to the two strips, wherein a second group of chambers has second through-openings that are positioned at a distance from at least one of the two or more strips, wherein the mixing case has a first section rectangular in cross-section, in which the mixing element is accommodated, and has a second section circular in cross-section, at which the outlet is provided.

2. The mixer in accordance with claim 1, wherein the mixing case and the mixing element form a third group of at least one chamber, which is formed as a reservoir chamber with closed lateral walls and only one opening, which is formed as an input opening in a transverse wall.

3. The mixer in accordance with claim 2, wherein the reservoir chamber is provided on the inlet-side end of the mixing element.

4. The mixer in accordance with claim 2, wherein the mixing element has at least one flow chamber adjacent to the reservoir chamber, wherein the at least one flow chamber has at least one through-opening running in parallel to the web.

5. The mixer in accordance with claim 4, wherein the cross-section of the flow chamber positioned perpendicularly to the direction of discharge of the material amounts to 80% to 120% of the cross-section of the through-opening of the flow chamber.

6. The mixer in accordance with claim 4, wherein the flow chamber is restricted in the direction of discharge of the material by a transverse wall of the plurality of transverse walls, and that the transverse wall has a transverse wall opening.

7. The mixer in accordance with claim 2, wherein the cross-section of the mixing element positioned perpendicularly to the longitudinal axis in a section of the reservoir chamber and/or flow chamber amounts to 105% to 150% of the cross-section of the mixing element positioned perpendicularly to the longitudinal axis of a following section of the mixing element considered in the direction of discharge of the material.

8. The mixer in accordance with claim 1, wherein the web centrally connects the two strips.

9. The mixer in accordance with claim 1, wherein the plurality of transverse walls are connected with the web and one of the two strips, and the lateral wall of the plurality of lateral walls extend from the plurality of transverse walls in the direction of the inlets in parallel to the two strips.

10. The mixer in accordance with claim 1, wherein chambers of the first group and the chambers of the second group each have precisely four through-openings, from which two through-openings are formed in the web and two additional through-openings run in parallel to the web.

11. The mixer in accordance with claim 1, wherein the mixing case and the mixing element each form four chambers positioned in the cross-section next to one another, which are at least partially offset in relation to one another in the direction of the longitudinal axis.

12. The mixer in accordance with claim 1, wherein the mixing case has an inlet section, in which an insert, which has at least two studs forming the inlets, is fixed in a sealed manner, and is set freely rotatably with respect to the mixing case.

13. The mixer in accordance with claim 12, wherein the studs of the insert are flow-connected with the chambers by means of channels forming at least one compensation chamber and/or running at least partially radially inwardly.

14. The mixer in accordance with claim 1, wherein the chambers of the first group and the chambers of the second group, considered in the direction of discharge of the components, are positioned in the middle and/or upper area of the mixing element.

Description

BRIEF DESCRIPTION OF THE FIGURES

(1) The disclosure will be explained in further detail in the following by means of exemplary embodiments and with reference to the diagrams. All the characteristics described and/or graphically represented thus form the object of the disclosure, either by themselves or in any desired combination, independently of their summary in the claims or in their referrals back to the same.

(2) The following are depicted schematically:

(3) FIG. 1a shows the individual parts of a mixer in accordance with the disclosure in accordance with a first embodiment in a side view,

(4) FIG. 1b shows the individual parts of the mixer in accordance with FIG. 1a in an additional side view,

(5) FIG. 1c shows the individual parts of the mixer in accordance with FIG. 1a in a perspective view,

(6) FIG. 2a shows the mixer in accordance with FIG. 1a in a sectional view,

(7) FIG. 2b shows the mixer in accordance with FIG. 1a in an additional sectional view,

(8) FIG. 2c shows the mixer in accordance with FIG. 1a in a view from above,

(9) FIG. 3 shows a perspective view, components of the mixer in accordance with FIG. 1a with increased details,

(10) FIG. 4a shows the mixing element of a mixer in accordance with a second embodiment of the disclosure in a perspective view,

(11) FIG. 4b shows the mixing element in accordance with FIG. 4a in a sectional view,

(12) FIG. 5 is a perspective view of a mixer with a third mixing element, an insert, and a mixing case,

(13) FIGS. 6a, 6b and 6c show a perspective view (FIG. 6a), a side view (FIG. 6b), and a longitudinal section (FIG. 6c) along the section plane A-A of a fourth mixing element,

(14) FIGS. 7a, 7b and 7c show a perspective view (FIG. 7a), and a side view (FIG. 7b), and a longitudinal section (FIG. 7c) along the section plane B-B of a fifth mixing element,

(15) FIGS. 8a, 8b and 8c show a perspective view (FIG. 8a), and a side view (FIG. 8b), and a longitudinal section (FIG. 8c) along the section plane C-C of a sixth mixing element,

(16) FIGS. 9a, 9b and 9c show a perspective view (FIG. 9a), and a side view (FIG. 9b), and a longitudinal section (FIG. 9c) along the section plane D-D of a seventh mixing element,

(17) FIGS. 10a, 10b and 10c show a perspective view (FIG. 10a), and a side view (FIG. 10b), and a longitudinal section (FIG. 10c) along the section plane E-E of an eighth element, and:

(18) FIGS. 11a, 11b and 11c show a perspective view (FIG. 11a), and a side view (FIG. 11b), and a longitudinal section (FIG. 11c) along the section plane F-F of a ninth mixing element.

DETAILED DESCRIPTION

(19) The static mixer depicted in the first embodiment in accordance with FIGS. 1a to 3 is essentially constructed from three components, namely, a mixing case 1, a mixing element 2, and an insert 3.

(20) The mixing case 1 is an extended component, which extends along a longitudinal axis L. The mixing case 1 has, in FIGS. 1a to 1c, a lower intake area 4 with an essentially circular cross-section, a middle area with rectangular cross-section, one mixing chamber 5, and a discharge end 6, which again has an essentially circular cross-section. The intake area 4 can, as indicated in the embodiment depicted, be provided with a thread section or the like or fastening means for the connection of the mixer with a cartridge, as well as with an outer profiling.

(21) The insert 3 is accommodated in the intake area 4 in a freely rotatable but axially solid manner, however, and by means of latching, for example. The insert 3 is provided with two studs 7, which form inlets of the mixer. The discharge end 6 positioned opposite the insert 3 is provided with an outlet 8. In the embodiment depicted, a partition wall 9 is formed between the studs 7, which wall is provided with a coding element 10 projecting over the mixing case 1, which coding element may, in a manner not further depicted, engage with a cartridge in a corresponding opening of the cartridge for the guiding of the mixer during the production of the connection. The studs 7 are flow-connected with the mixing chamber 5 by means of partially radial or arc-shaped inwardly leading channels 11.

(22) The mixing element 2 is accommodated in the rectangular section of the mixing case 1 and has, on its lower end in FIGS. 1a to 1c, a plate 12 with a central intake aperture 12a, through which the components to be mixed arrive from the channels 11 into the mixing chamber 5. In particular, the mixing element 2 is insertable into the mixing case 1 and is held by means of the plate 12 in the axial direction in such a way that a displacement of the mixing element 2 in the direction of the discharge end 6 of the mixing case 1, such as, for example, through the discharge pressure of the components, is prevented. Two strips 13 of the mixing element 2, which are connected with one another by means of a web 14, which is designed in an H-shape in a cross-section perpendicular to the longitudinal axis L the mixing element 2, extend parallel to the longitudinal axis L. The strips 13 extend, in the embodiment depicted, over the entire width of the mixing chamber 5 into the area of the mixing case with a rectangular cross-section.

(23) The web 14 is provided with several through-openings, which are rectangular in the embodiment depicted. The first through-openings 15 thus extend over the entire width of the web 14 and thereby adjoin both strips 13. The second through-openings 16, on the other hand, do not extend over the entire width of the web 14 and are thereby positioned spaced from the strips 13. This is also evident from FIG. 2a and the enlarged detail A of FIG. 3.

(24) Several transverse walls 17 offset to one another in the direction of the longitudinal axis L are formed against the web 14, which [traverse walls], in the embodiment depicted, extend from one of the strips 13 up to approximately the middle of the web 14. In a cross-sectional plane perpendicular to the longitudinal axis L, a first transverse wall 17 is present on one side of the web 14, whereas a transverse wall 17 offset to the first transverse wall is provided on the other side of the web 14. In other words, for example, in the increased detailed view in FIG. 3, the forward transverse wall 17 is connected with the right strip 13, whereas the transverse wall 17 provided on the rear side of the web 14 is connected with the left strip 13.

(25) Lateral walls 18 extend from the transverse walls 17 in parallel with the longitudinal axis L and perpendicularly to the web 14 at the bottom of the figures, i.e., in the direction towards the intake area 4 of the mixer. These lateral walls 18 do not extend in the axial direction up to the following transverse wall 17, but are instead interrupted by additional through-openings 19, whereby the through-openings 15, 16 and the through-openings 19 are positioned in the direction of the longitudinal axis L offset to one another in such a way that the through-openings 19 are provided in the areas in which the web 14 is closed, i.e., where there are no through-openings 15, 16. On the other hand, the through-openings 15, 16 are positioned in the areas in which no through-openings 19 are present in the lateral walls 18.

(26) The mixing case 1, the strips 13, the web 14, the transverse walls 17, and the lateral walls 18 thus define the chambers 20, 21, which are flowed through by the components to be mixed on the flow path from the inlets to the outlet. The length of the chambers 20, 21 in the direction of the longitudinal axis L is defined by the distance of two transverse walls 17 positioned in parallel one behind the other to the longitudinal axis L. The chambers essentially differ through the differences of the through-openings 15, 16 in the first chambers 20 and the second chambers 21, as well as through their arrangement within the mixer. Adjacent chambers are thus positioned in the direction of the longitudinal axis L offset in relation to one another by a half chamber length.

(27) In this arrangement, each of the chambers is provided with two through-openings 15 or 16, respectively, and with two through-openings 19. Each of the chambers is thus flow-connected, by means of the through-openings 15 or 16, respectively, with a chamber backwardly offset along the longitudinal axis L by half a chamber length and by half a chamber length on the other side of the web 14. In addition, each chamber is connected in a flow-connected manner by way of the through-openings 19 with a chamber backwardly offset along the longitudinal axis L by half a chamber length and a chamber forwardly offset by half a chamber length on the same side of the web 14. Each chamber is thereby connected by way of the four through-openings 15, 16, 19 with four different other chambers. The deflection, splitting into partial streams, and merging of the partial streams of the components during the through-flow of the different chambers thereby brings about an intensive mixing of the components.

(28) In addition to these chambers 20, 21 designed essentially equally in their construction, there are also corresponding incomplete chambers with only one or with only two through-openings present in the area of the inlet end and of the outlet end of the mixer.

(29) In the second embodiment of FIGS. 4a and 4b, the mixing element 2 is modified relative to the first embodiment in such a way that reservoir chambers 22, which have only one inlet, but no outlets, however, are formed in the vicinity of the plate 12. In these reservoir chambers 22, the initial quantity of a component tending to forerunning can still be collected and stored before entering into the chambers 20, 21, without this initial quantity participating in the additional mixing process.

(30) A third embodiment of the mixing element 2 is depicted in FIG. 5. In comparison with the above-described embodiments, the mixing element 2 depicted here comprises both a rectangular area 2a as well as a helical area 2b, which connects in the direction of discharge of the components with the rectangular area 2a. This has the advantage that the length of the mixing element 2 can be adjusted to the respective application requirements. Because the rectangular area 2a has good mixing properties, but also a high discharge pressure, while the helical area 2b provides a lower discharge pressure, the mixing effect, the length, and the output pressure on the respective application requirements can be adjusted through the adjustment of the lengths of the rectangular area 2a and of the helical area 2b.

(31) FIGS. 6a to 11c depict additional embodiments of a mixing element 2 with a reservoir chamber 22. The components to be mixed can flow in through the intake opening 12a provided centrally in the collar 15 from the insert 3 (not depicted).

(32) FIGS. 6a to 6c depict a mixing element 2 in accordance with a fourth embodiment. Considered from the longitudinal view of FIG. 6b, the arrangement of the reservoir chamber 22 of the first portion of the mixing element 2 can be seen in the direction of discharge of the material. In addition, the section plane A-A is depicted, while the corresponding longitudinal section is depicted in FIG. 6c.

(33) Upon the flowing of the components in through the intake opening 12a, these are divided on a lateral wall 18 and flow partially into a reservoir chamber 22 and partially into a flow chamber 23. The components flow from the flow chamber 23 through a through-opening 19 to the chambers 20, 21 of the mixing element 2.

(34) In the fourth embodiment depicted here, the cross-section of the through-opening 19 is smaller than the cross-section of the flow chamber 23. The smaller cross-section, and here, therefore, the cross-section of the through-opening 19, is thus decisive for the drop in pressure upon the discharge of the components.

(35) Relatively high discharge pressures can thereby appear, whereby the discharge pressure is also influenced by the configuration of the mixing element 2 and the specific viscosity of the components.

(36) A fifth mixing element 2 is depicted in FIGS. 7a to 7c in a perspective view, in a side view, and in a longitudinal section along the section plane B-B. In comparison with the example depicted in FIGS. 6a to 6c, the mixing element 2 was shortened on its end positioned in the direction of discharge of the material. This reduces the discharge pressure, so that this embodiment for components is suitable upon higher viscosity.

(37) FIGS. 8a to 8c depict a mixing element 2 in a sixth embodiment. In comparison with the fourth embodiment, the draft angles in accordance with FIGS. 6a to 6c were increased here on the open sides of the mixing element. The draft angles have, in particular, an angular range of 0.1° to 2°, preferably 0.1° to 1° and, particularly preferably, up to 0.5°±0.1°.

(38) A seventh mixing element, which has been widened in the area of the reservoir chamber 22 and of the flow chamber 23, is depicted in FIGS. 9a to 9c. Through that fact, the pressure is reduced when the components are discharged, because the cross-section of flow has been increased overall in this area. This embodiment is therefore particularly advantageous for highly viscous components. In addition, the volume of the reservoir chamber 22 has been increased, so that even more forerun can be compensated for.

(39) An eighth mixing element 2 is depicted in FIGS. 10a to 10c. Here, the reservoir chamber 22 has been reduced in comparison with the preceding embodiments in such a way that the through-opening 19 has been increased. Here, the cross-section of flow of the flow chamber 23 and of the through-opening 19 are equally sized. This leads in turn to the fact that the discharge pressure has been reduced in comparison with other embodiments.

(40) FIGS. 11a to 11c depict a ninth mixing element. Here, in a transverse wall 17 sealing the flow chamber 23, a transverse wall opening 24 was added in the direction of discharge of the material. This allows a portion of the components through the transverse wall opening 24 to flow directly into the adjoining mixing chamber, without the through-opening 19 having to be passed. Through that fact, the discharge pressure of the components is reduced, since a portion of this does not have to change its direction of flow in order to flow through the through-opening 19.