CA2500637A1 - A static mixer for a curing mixed product - Google Patents
A static mixer for a curing mixed product Download PDFInfo
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- CA2500637A1 CA2500637A1 CA002500637A CA2500637A CA2500637A1 CA 2500637 A1 CA2500637 A1 CA 2500637A1 CA 002500637 A CA002500637 A CA 002500637A CA 2500637 A CA2500637 A CA 2500637A CA 2500637 A1 CA2500637 A1 CA 2500637A1
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- mixing
- corner
- static mixer
- accordance
- mixer
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/432—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction with means for dividing the material flow into separate sub-flows and for repositioning and recombining these sub-flows; Cross-mixing, e.g. conducting the outer layer of the material nearer to the axis of the tube or vice-versa
- B01F25/4321—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction with means for dividing the material flow into separate sub-flows and for repositioning and recombining these sub-flows; Cross-mixing, e.g. conducting the outer layer of the material nearer to the axis of the tube or vice-versa the subflows consisting of at least two flat layers which are recombined, e.g. using means having restriction or expansion zones
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/47—Mixing liquids with liquids; Emulsifying involving high-viscosity liquids, e.g. asphalt
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The static mixer is used for a curing mixed product of flowable components which react to form a solidifying mass on mixing. The mixer includes an installed element (1) manufactured by injection moulding and a tube encasing the installed element. The installed element has a chamber arrangement by a plurality of mixing chambers (2). The mixing chambers are arranged behind one another and next to one another along a tube axis (10). They are delineated from one another by radial longitudinal walls (3a, 3b, 3c, 3d) oriented in the direction of the tube axis and by transverse walls (4a, 4b) standing transversely to the tube axis. Openings (5a, 5b, 5c, 5d) in the radial long walls between adjacent chambers establish inlets and outlets for the mixed product.
Two outer sides, in particular two parallel outer longitudinal walls (6), extending in the direction of the tube axis form first outer sides (6a) of the mixing chambers. The transverse wall (4b) and one of the outer longitudinal walls (6) respectively include - for at least some of the mixing chambers - a corner which is filled with wall material and whose filling, namely the first corner filling (7), sets up a concave surface (7a) to the interior space of the mixing chamber.
Two outer sides, in particular two parallel outer longitudinal walls (6), extending in the direction of the tube axis form first outer sides (6a) of the mixing chambers. The transverse wall (4b) and one of the outer longitudinal walls (6) respectively include - for at least some of the mixing chambers - a corner which is filled with wall material and whose filling, namely the first corner filling (7), sets up a concave surface (7a) to the interior space of the mixing chamber.
Description
P.7445 Sulzer Chemtech AG. CH-8404 Winterthur (Switzerland) A static mixer for a curing mixed product The invention relates to a static mixer for a curing mixed product in accor-dance with the preamble of claim 1 and to use of the mixer.
Static mixers for the mixing of at least two flowable components are described in EP-A- 0 749 776 and EP-A- 0 815 929. These mixers, which are compact, deliver good mixing results despite a simple, material-saving design, and indeed in the mixing of high-viscosity substances such as sealants, finro-component foams or two-components adhesives. The installed elements forming the mixer structure can be manufactured at a favourable price by injection moulding from thermoplastics so that they can be used economically for one-time use. Such a "disposable mixer" is mainly used for curing prod-ucts, since the mixers can practically not be cleaned with these products.
Even if the mixing of a curing mixed product with disposable mixers is oper-ated continuously or quasi-continuously (for example in cycles), finite useful lives, however, result. With a continuous carrying out of the mixing under a pressing pressure remaining largely constant, i.e. with a pressure drop along the installed elements of the mixer, for example, the discharge of mixing product noticeably reduces according to the service life. An increase in the pressing pressure only allows a relatively short extension of the mixed product discharge.
It is the object of the invention to provide an improved mixer with respect to the said disposable mixers for which a longer service life results. This object is satisfied by the mixer defined in claim 1.
Static mixers for the mixing of at least two flowable components are described in EP-A- 0 749 776 and EP-A- 0 815 929. These mixers, which are compact, deliver good mixing results despite a simple, material-saving design, and indeed in the mixing of high-viscosity substances such as sealants, finro-component foams or two-components adhesives. The installed elements forming the mixer structure can be manufactured at a favourable price by injection moulding from thermoplastics so that they can be used economically for one-time use. Such a "disposable mixer" is mainly used for curing prod-ucts, since the mixers can practically not be cleaned with these products.
Even if the mixing of a curing mixed product with disposable mixers is oper-ated continuously or quasi-continuously (for example in cycles), finite useful lives, however, result. With a continuous carrying out of the mixing under a pressing pressure remaining largely constant, i.e. with a pressure drop along the installed elements of the mixer, for example, the discharge of mixing product noticeably reduces according to the service life. An increase in the pressing pressure only allows a relatively short extension of the mixed product discharge.
It is the object of the invention to provide an improved mixer with respect to the said disposable mixers for which a longer service life results. This object is satisfied by the mixer defined in claim 1.
The static mixer is used for a curing mixed product of flowable components which react to form a solidifying mass on mixing. The mixer includes an installed element manufactured by injection moulding and a tube encasing the installed element. The installed element has a chamber arrangement by a plurality of mixing chambers. The mixing chambers are arranged behind one another and next to one another along a tube axis. They are delineated from one another by radial longitudinal walls oriented in the direction of the tube axis and by transverse walls standing transversely to the tube axis. Openings in the radial long walls between adjacent chambers establish inlets and out-lets for the mixed product. Two parallel outer longitudinal walls form outer sides of the mixing chambers in a frequently used embodiment. The trans-verse wall and one of the outer longitudinal walls respectively include - for at least some of the mixing chambers - a corner which is filled with wall material and whose filling, namely the first comer filling, sets up a concave surface to the interior space of the mixing chamber.
Here, the "concave surface" means a surface which is not arched toward the interior space of the mixing chamber at any point. The surface can also be planar regionally. The concave surface is concavely curved or forms, together with the flanks of the corner, a "concave segment" in cross-section which approximately has the extent of a concavely curved curve. A small wedge-shaped corner filling provides an example for a concave surface in the sense of the second meaning.
Dependent claims 2 to 9 relate to advantageous embodiments of the mixer in accordance with the invention. A use of the mixer in accordance with the invention is the subject of claim 10.
A static mixer is known from US-A- 200410008576 whose installed element is similar to that of the mixer in accordance with the invention, but with the corresponding corner fillings being wedge-shaped and not concave in the sense of the meaning defined above. The shape of these corner fillings is less favourable with respect to an extension of the service life. There is also a disadvantage in that the wedge-shaped corner fillings mean relatively large aggregations of wall material. Such material aggregations are unfavourable in the injection moulding of the installed element since they result in longer production cycles and thus higher manufacturing costs.
The invention will be explained in the following with reference to the drawings.
There are shown:
Fig. 1 sectionally, a mixer structure (installed elements) of a known disposable mixer;
Fig. 2 a mixing chamber of a mixer in accordance with the invention;
and Fig. 3 a cylindrical installed element of the mixer in accordance with the invention.
The mixer structure shown sectionally in Fig. 1 of the disposable mixer known from the printed document EP-A-0 749 776 is an installed element 1 which is manufactured by injection moulding and which has been inserted into a tube (not shown). This tube encasing the installed element 1 has an interior space with a square cross-section into which the installed element 1 fits with shape matching. (The installed element 1 and the encasing tube could also be made cylindrically: cf. Fig. 3). Flowable components of a curing mixed product are pressed through the tube and the installed element 1 from cartridges by means of pistons, with the reactive mixed product components being mixed to form a solidifying mass. The installed element 1 has a chamber arrangement by a plurality of mixing chambers 2. The mixing chambers 2 are arranged behind one another and next to one another along a tube axis 10. The mixing chambers 2 are delineated from one another by radial longitudinal walls 3a, 3b, 3c and 3d which are oriented in the direction of the tube axis 10 and by transverse walls 4a and 4b standing transversely to the tube axis 10. Open-ings 5a, 5b, 5c and 5d in the radial longitudinal walls 3a, 3b, 3c and 3c be-tween adjacent chambers 2 represent inlets and outlets for the mixed product.
First outer sides 6a of the mixing chambers 2 are formed by two parallel outer longitudinal walls 6. The mixing chambers 2 each have a second outer side 6b between these longitudinal walls 6 which is open and which is not bounded by the tube (not shown). The outer longitudinal walls 6 can also be omitted.
In the said frequently used embodiment, the longitudinal walls 6 form the first outer sides 6a.
A mixing chamber 2 made in accordance with the invention is shown in Fig. 2.
The transport of the mixed product through the mixing chamber 2 is also shown with arrows there. The inlet 5a, through which a flow 12a of the mixed product enters, is located at the inlet side directly by the transverse wall 4a (see Fig. 1 ). A flow 12b enters through the second inlet 5b. The flow 12a branches into part flows 12ad and 12ac which flow off into adjacent mixing chambers through the outlets 5d and 5c. The flow 12b is accordingly branched into part flows 12bd and 12bc which exit the mixing chamber 2 shown in full in Fig. 2 together with the part flows 12ad and 12ac.
A field of pressure gradients is created in the mixing chamber 2 on the press-ing of the mixed product through the installed elements 1. A velocity field of the mixed product flow is formed in accordance with the pressure gradients.
The pressure gradients are the most pronounced in the region of the openings 5a, 5b, 5c and 5d, where the flow speeds are also the highest. The flow can be thought of as a bundle of flow threads. The cross-sections of the flow threads inside the mixing chamber 2 widen and relatively low flow speeds consequently occur there. The pressure gradients are also reduced accord-ingly. The reduction of the pressure gradients is location-dependent. The pressure gradients are in particular very low in corner regions which lie at a larger distance from the openings 5a, 5b, 5c and 5d. They practically disap-pear there so that the mixed product flows very slowly and practically stag-nates. A reaction occurs between the mixed product components in mixing chambers in which the mixing has already progressed a lot. This results in an increase in the viscosity of the mixed product in the regions with a stagnating 5 flow. The stagnating regions increase due to this change of the viscosity so that a local immobilisation inexorably occurs. This immobilisation starts in the said corner regions and expands from there into the interior region of the mixing chamber 2. The flow resistance of the installed elements 1 thereby increases. The mixing quality is also simultaneously impaired.
The fact is associated with the occurrence of the immobilisation that the mixing with the disposable mixer can only be carried out during a service life which depends on the reaction kinetics of the curing mixed product. The service life can be increased when measures are taken against the stagnation in the flowing mixed product. Such measures are modifications provided in accordance with the invention of the mixing chamber 2 shown in Fig. 1. The modifications in question are as follows:
At the outlet side, the transverse wall 4b and the outer longitudinal wall 6 include a corner which is filled with wall material and which is indicated as a "tripod" drawn with a chain-dotted line by the transverse wall 4b. The filling of this corner, which is termed a "first comer filling 7", sets up a concave surface 7a (in accordance with the meaning recited above) with respect to the interior space of the mixing chamber 2. As becomes vividly clear from Fig. 2, the conditions for the occurrence of stagnation are eased by the first corner filling 7, which brings about an extension of the service life.
A further measure in the form of a "second corner filling 8" additionally con-tributes to an extension of the service life: in the mixing chamber 2, the trans-verse wall 4a and the second outer side 6b include a corner which is filled with wall material and whose filling, namely the second corner filling 8, like-wise sets up a concave surface 8a to the interior space of the mixing chamber 2. The action of this second corner filling 8 is the same as that of the first corner filling 7.
The immobilisation comes into effect the more strongly, the further a mixing chamber 2 lies downstream - as long as no measure, or the same measure everywhere, is taken against this problem. It is therefore of advantage for the first andlor second comer fillings 7, 8 to be made at least partly of different size and for each corner filling 7 or 8 to be equally as large as or smaller than the corner fillings 7 or 8 following downstream.
The corner fillings 7, 8 should not form material aggregations which are too large, for which reasons were already given above. It is therefore advanta-genus if the following applies to the first corner filling 7 (and accordingly to the second comer filling 8): the concave surfaces 7a (or 8a) each merge at an interface line 7b into a planar surface part 4b' (or 4a') of the transverse wall 4b (or 4a); this interface line 7b should lie in a middle strip of the transverse wall 4b, with this strip occupying the middle third of the transverse wall 4b at its inner side.
The concave surfaces 7a or 8a are each at least approximately part of a circular cylinder. The axis of this cylinder lies in a plane standing perpendicu-lar to the tube axis 10. The cylinder axes associated with the two corner fillings 7 and 8 are aligned perpendicular to one another.
The concave surfaces 7a and 8a each merge with a smooth course into planar surface parts 4a' or 4b' of the transverse walls 4a or 4b. The same applies to transitions in planes on which the outer sides 6a or 6b of the mixing chamber 2 lie.
The second outer side 6b of the mixing chamber 2 is covered by the second corner filling in the region of a zone whose area is no larger than the opening area of the inlet 5a bordering on the transverse wall 4a. This condition results from the geometry of the tool used as the mould in the injection mould device.
A cylindrical installed element of the mixer in accordance with the invention is shown in Fig. 3 which also has first and second corner fillings 7 and 8. The outer longitudinal walls 6, which form the first outer sides 6a of the mixing chambers, have a circular segment-like cross-section. The second outer side 6b is curved. The one flank of the second corner filling 8 is therefore also curved accordingly.
On the use of the mixer in accordance with the mixer, the mixed product of components which react to form a solidifying mass on mixing is advanta-geously mixed continuously or quasi-continuously with a pressing pressure which remains largely constant or varies in cycles, i.e. with a pressure drop along the installed elements 1 of the mixer. The mixing is interrupted and the mixer replaced as soon as a discharge of mixed product becomes noticeably smaller or an increase of the pressing pressure becomes necessary.
Here, the "concave surface" means a surface which is not arched toward the interior space of the mixing chamber at any point. The surface can also be planar regionally. The concave surface is concavely curved or forms, together with the flanks of the corner, a "concave segment" in cross-section which approximately has the extent of a concavely curved curve. A small wedge-shaped corner filling provides an example for a concave surface in the sense of the second meaning.
Dependent claims 2 to 9 relate to advantageous embodiments of the mixer in accordance with the invention. A use of the mixer in accordance with the invention is the subject of claim 10.
A static mixer is known from US-A- 200410008576 whose installed element is similar to that of the mixer in accordance with the invention, but with the corresponding corner fillings being wedge-shaped and not concave in the sense of the meaning defined above. The shape of these corner fillings is less favourable with respect to an extension of the service life. There is also a disadvantage in that the wedge-shaped corner fillings mean relatively large aggregations of wall material. Such material aggregations are unfavourable in the injection moulding of the installed element since they result in longer production cycles and thus higher manufacturing costs.
The invention will be explained in the following with reference to the drawings.
There are shown:
Fig. 1 sectionally, a mixer structure (installed elements) of a known disposable mixer;
Fig. 2 a mixing chamber of a mixer in accordance with the invention;
and Fig. 3 a cylindrical installed element of the mixer in accordance with the invention.
The mixer structure shown sectionally in Fig. 1 of the disposable mixer known from the printed document EP-A-0 749 776 is an installed element 1 which is manufactured by injection moulding and which has been inserted into a tube (not shown). This tube encasing the installed element 1 has an interior space with a square cross-section into which the installed element 1 fits with shape matching. (The installed element 1 and the encasing tube could also be made cylindrically: cf. Fig. 3). Flowable components of a curing mixed product are pressed through the tube and the installed element 1 from cartridges by means of pistons, with the reactive mixed product components being mixed to form a solidifying mass. The installed element 1 has a chamber arrangement by a plurality of mixing chambers 2. The mixing chambers 2 are arranged behind one another and next to one another along a tube axis 10. The mixing chambers 2 are delineated from one another by radial longitudinal walls 3a, 3b, 3c and 3d which are oriented in the direction of the tube axis 10 and by transverse walls 4a and 4b standing transversely to the tube axis 10. Open-ings 5a, 5b, 5c and 5d in the radial longitudinal walls 3a, 3b, 3c and 3c be-tween adjacent chambers 2 represent inlets and outlets for the mixed product.
First outer sides 6a of the mixing chambers 2 are formed by two parallel outer longitudinal walls 6. The mixing chambers 2 each have a second outer side 6b between these longitudinal walls 6 which is open and which is not bounded by the tube (not shown). The outer longitudinal walls 6 can also be omitted.
In the said frequently used embodiment, the longitudinal walls 6 form the first outer sides 6a.
A mixing chamber 2 made in accordance with the invention is shown in Fig. 2.
The transport of the mixed product through the mixing chamber 2 is also shown with arrows there. The inlet 5a, through which a flow 12a of the mixed product enters, is located at the inlet side directly by the transverse wall 4a (see Fig. 1 ). A flow 12b enters through the second inlet 5b. The flow 12a branches into part flows 12ad and 12ac which flow off into adjacent mixing chambers through the outlets 5d and 5c. The flow 12b is accordingly branched into part flows 12bd and 12bc which exit the mixing chamber 2 shown in full in Fig. 2 together with the part flows 12ad and 12ac.
A field of pressure gradients is created in the mixing chamber 2 on the press-ing of the mixed product through the installed elements 1. A velocity field of the mixed product flow is formed in accordance with the pressure gradients.
The pressure gradients are the most pronounced in the region of the openings 5a, 5b, 5c and 5d, where the flow speeds are also the highest. The flow can be thought of as a bundle of flow threads. The cross-sections of the flow threads inside the mixing chamber 2 widen and relatively low flow speeds consequently occur there. The pressure gradients are also reduced accord-ingly. The reduction of the pressure gradients is location-dependent. The pressure gradients are in particular very low in corner regions which lie at a larger distance from the openings 5a, 5b, 5c and 5d. They practically disap-pear there so that the mixed product flows very slowly and practically stag-nates. A reaction occurs between the mixed product components in mixing chambers in which the mixing has already progressed a lot. This results in an increase in the viscosity of the mixed product in the regions with a stagnating 5 flow. The stagnating regions increase due to this change of the viscosity so that a local immobilisation inexorably occurs. This immobilisation starts in the said corner regions and expands from there into the interior region of the mixing chamber 2. The flow resistance of the installed elements 1 thereby increases. The mixing quality is also simultaneously impaired.
The fact is associated with the occurrence of the immobilisation that the mixing with the disposable mixer can only be carried out during a service life which depends on the reaction kinetics of the curing mixed product. The service life can be increased when measures are taken against the stagnation in the flowing mixed product. Such measures are modifications provided in accordance with the invention of the mixing chamber 2 shown in Fig. 1. The modifications in question are as follows:
At the outlet side, the transverse wall 4b and the outer longitudinal wall 6 include a corner which is filled with wall material and which is indicated as a "tripod" drawn with a chain-dotted line by the transverse wall 4b. The filling of this corner, which is termed a "first comer filling 7", sets up a concave surface 7a (in accordance with the meaning recited above) with respect to the interior space of the mixing chamber 2. As becomes vividly clear from Fig. 2, the conditions for the occurrence of stagnation are eased by the first corner filling 7, which brings about an extension of the service life.
A further measure in the form of a "second corner filling 8" additionally con-tributes to an extension of the service life: in the mixing chamber 2, the trans-verse wall 4a and the second outer side 6b include a corner which is filled with wall material and whose filling, namely the second corner filling 8, like-wise sets up a concave surface 8a to the interior space of the mixing chamber 2. The action of this second corner filling 8 is the same as that of the first corner filling 7.
The immobilisation comes into effect the more strongly, the further a mixing chamber 2 lies downstream - as long as no measure, or the same measure everywhere, is taken against this problem. It is therefore of advantage for the first andlor second comer fillings 7, 8 to be made at least partly of different size and for each corner filling 7 or 8 to be equally as large as or smaller than the corner fillings 7 or 8 following downstream.
The corner fillings 7, 8 should not form material aggregations which are too large, for which reasons were already given above. It is therefore advanta-genus if the following applies to the first corner filling 7 (and accordingly to the second comer filling 8): the concave surfaces 7a (or 8a) each merge at an interface line 7b into a planar surface part 4b' (or 4a') of the transverse wall 4b (or 4a); this interface line 7b should lie in a middle strip of the transverse wall 4b, with this strip occupying the middle third of the transverse wall 4b at its inner side.
The concave surfaces 7a or 8a are each at least approximately part of a circular cylinder. The axis of this cylinder lies in a plane standing perpendicu-lar to the tube axis 10. The cylinder axes associated with the two corner fillings 7 and 8 are aligned perpendicular to one another.
The concave surfaces 7a and 8a each merge with a smooth course into planar surface parts 4a' or 4b' of the transverse walls 4a or 4b. The same applies to transitions in planes on which the outer sides 6a or 6b of the mixing chamber 2 lie.
The second outer side 6b of the mixing chamber 2 is covered by the second corner filling in the region of a zone whose area is no larger than the opening area of the inlet 5a bordering on the transverse wall 4a. This condition results from the geometry of the tool used as the mould in the injection mould device.
A cylindrical installed element of the mixer in accordance with the invention is shown in Fig. 3 which also has first and second corner fillings 7 and 8. The outer longitudinal walls 6, which form the first outer sides 6a of the mixing chambers, have a circular segment-like cross-section. The second outer side 6b is curved. The one flank of the second corner filling 8 is therefore also curved accordingly.
On the use of the mixer in accordance with the mixer, the mixed product of components which react to form a solidifying mass on mixing is advanta-geously mixed continuously or quasi-continuously with a pressing pressure which remains largely constant or varies in cycles, i.e. with a pressure drop along the installed elements 1 of the mixer. The mixing is interrupted and the mixer replaced as soon as a discharge of mixed product becomes noticeably smaller or an increase of the pressing pressure becomes necessary.
Claims (10)
1. A static mixer for a curing mixed product of flowable components which react on mixing to form a solidifying mass, which mixer includes an in-stalled element (1) made by injection moulding and a tube encasing the installed element, wherein the installed element has a plurality of mix-ing chambers (2), the mixing chambers - arranged behind one another and next to one another along a tube axis (10) - are delineated from one another by radial longitudinal walls (3a, 3b, 3c, 3d) oriented in the direction of the tube axis and by transverse walls (4a, 4b) standing transversely to the tube axis, wherein openings (5a, 5b, 5c, 5c) in the radial longitudinal walls between adjacent chambers establish inlets and outlets for the mixed product and wherein two outer sides, in par-ticular two parallel outer longitudinal walls (6), extending in the direction of the tube axis form first outer sides (6a) of the mixing chambers, characterised in that - at least for some of the mixing chambers - one transverse wall (4b) and one of the first outer sides (6a) each form a corner which is partly filled with wall material and whose filling, namely the first corner filling (7), sets up a concave surface (7a) to the interior space of the mixing chamber which is concavely curved or forms a concave segment in cross-section with the flanks of the corner.
2. A static mixer in accordance with claim 1, characterised in that the mixing chambers (2) each have a second outer side (6b) between the first outer sides (6a) which is at least partly open and which is bounded there by the tube; in that one transverse wall (4a) and the second outer side respectively include - at least for some of the mixing chambers - a corner at the inlet side which is partly filled with wall material and whose filling, namely the second corner filling (8), sets up a concave surface (8a) to the interior space of the mixing chamber which is con-cavely curved or forms a concave segment in cross-section with the flanks of the corner.
3. A static mixer in accordance with claim 1 or claim 2, characterised in that the concave surfaces (7a, 8a) each merge into a planar surface part (4b') of the transverse wall (4b) at an interface line (7b) and this interface line lies in a middle strip of the transverse wall, with this strip occupying the middle third of the transverse wall on its inner sides.
4. A static mixer in accordance with any one of claims 1 to 3, character-ised in that the concave surface (7a, 8a) is at least approximately part of a circular cylinder whose axis lies in a plane standing perpendicular to the tube axis (10).
5. A static mixer in accordance with claim 1 or claim 2, characterised in that the concave surfaces (7a, 8a) each merge with a smooth course into planar surface parts (4b') of the transverse walls (4b) and/or in planes on which the outer sides (6a, 6b) of the mixing chambers (2) lie.
6. A static mixer in accordance with any one of claims 1 to 5, character-ised in that the second outer side (6b) of the mixing chamber (2) is covered by the second corner filling (8) in the region of a zone whose area is equally as large as the opening area of the inlet 5a which bor-ders on the transverse wall (4a).
7. A static mixer in accordance with any one of claims 1 to 6, character-ised in that the first and/or second comer fillings (7, 8) are at least partly of different sizes.
8. A static mixer in accordance with claim 7, characterised in that each corner filling is equally as large as or smaller than the corresponding corner fillings following downstream.
9. A static mixer in accordance with any one of claims 1 to 8, character-ised in that the cross-sections of the tube, and accordingly that of the installed element (1), are rectangular or circular.
10. Use of the static mixer in accordance with any one of claims 1 to 9 for the mixing of a curing mixed product of flowable components which re-act to form a solidifying mass on mixing, with mixing taking place con-tinuously or quasi-continuously at a pressing pressure which remains largely constant or varies in cycles, i.e. with a pressure drop along the installed elements (1) of the mixer, and with the mixing being inter-rupted and the mixer replaced as soon as a discharge of mixed product becomes noticeably smaller or an increase in the pressing pressure becomes necessary.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04405246 | 2004-04-22 | ||
| EP04405246.2 | 2004-04-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2500637A1 true CA2500637A1 (en) | 2005-10-22 |
| CA2500637C CA2500637C (en) | 2013-06-25 |
Family
ID=34932067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2500637A Expired - Fee Related CA2500637C (en) | 2004-04-22 | 2005-03-14 | A static mixer for a curing mixed product |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US7322740B2 (en) |
| EP (1) | EP1588757B1 (en) |
| JP (1) | JP4686246B2 (en) |
| CN (1) | CN100478058C (en) |
| AT (1) | ATE368507T1 (en) |
| CA (1) | CA2500637C (en) |
| DE (1) | DE502005001119D1 (en) |
| ES (1) | ES2290872T3 (en) |
| TW (1) | TWI354577B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040141413A1 (en) * | 2002-12-06 | 2004-07-22 | Wilhelm A. Keller | Static mixer |
| DE202008007801U1 (en) | 2007-09-19 | 2008-08-21 | Kettenbach Gmbh & Co. Kg | container |
| US8215940B2 (en) * | 2009-03-20 | 2012-07-10 | The United States Of America As Represented By The Secretary Of The Army | Layer multiplying apparatus |
| US7985020B2 (en) * | 2009-09-25 | 2011-07-26 | Nordson Corporation | Cross flow inversion baffle for static mixer |
| DE202011050465U1 (en) | 2011-06-16 | 2011-08-17 | Vosschemie Gmbh | Static mixer for mixing at least two flowable components |
| KR101432185B1 (en) | 2012-11-14 | 2014-08-20 | 주식회사 생 | Plate spiral type rectangular conduit line mixer |
| US9724653B2 (en) | 2015-02-12 | 2017-08-08 | Nordson Corporation | Double wedge mixing baffle and associated static mixer and methods of mixing |
| JP6931355B2 (en) | 2015-11-13 | 2021-09-08 | リ ミキサーズ，インコーポレーテッド | Static mixer |
| US10232327B2 (en) | 2016-03-03 | 2019-03-19 | Nordson Corporation | Flow inverter baffle and associated static mixer and methods of mixing |
| CH713229A1 (en) * | 2016-12-14 | 2018-06-15 | Streiff Felix | Mixing elements with high strength and mixing effect. |
| DE102017117198A1 (en) | 2017-07-28 | 2019-01-31 | 3lmed GmbH | mixer |
| US11717794B2 (en) | 2017-07-28 | 2023-08-08 | 3lmed GmbH | Mixer |
| DE102019123200B4 (en) * | 2019-08-29 | 2021-12-30 | Marco Systemanalyse Und Entwicklung Gmbh | DEVICE AND METHOD FOR SUPPLYING A LIQUID MEDIUM |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CH376476A (en) * | 1958-07-08 | 1964-04-15 | Onderzoekings Inst Res | Method and device for mixing flowing media by means of stationary guide elements |
| US3239197A (en) * | 1960-05-31 | 1966-03-08 | Dow Chemical Co | Interfacial surface generator |
| US3328003A (en) * | 1965-02-09 | 1967-06-27 | Dow Chemical Co | Method and apparatus for the generation of a plurality of layers in a flowing stream |
| DE2245820C2 (en) * | 1972-09-19 | 1974-08-22 | Windmoeller & Hoelscher, 4540 Lengerich | Extrusion press for processing plastic, in particular thermoplastic or non-crosslinked elastomeric materials |
| US4179222A (en) * | 1978-01-11 | 1979-12-18 | Systematix Controls, Inc. | Flow turbulence generating and mixing device |
| NL8602338A (en) * | 1986-09-16 | 1988-04-18 | Hoogovens Groep Bv | GAS MIXER. |
| US4850705A (en) * | 1987-11-18 | 1989-07-25 | Horner Terry A | Motionless mixers and baffles |
| EP0749776B1 (en) * | 1995-06-21 | 2001-01-24 | Sulzer Chemtech AG | Mixer with tubular housing |
| EP0815929B1 (en) * | 1996-07-05 | 2000-08-30 | Sulzer Chemtech AG | Static mixer |
| ATE308375T1 (en) * | 2000-02-17 | 2005-11-15 | Sulzer Chemtech Ag | STATIC MIXER |
| US20030048694A1 (en) * | 2001-09-12 | 2003-03-13 | Tah Industries Inc. | Material mixing device and method |
| US6773156B2 (en) * | 2002-07-10 | 2004-08-10 | Tah Industries, Inc. | Method and apparatus for reducing fluid streaking in a motionless mixer |
-
2005
- 2005-03-07 TW TW094106836A patent/TWI354577B/en not_active IP Right Cessation
- 2005-03-14 CA CA2500637A patent/CA2500637C/en not_active Expired - Fee Related
- 2005-03-23 AT AT05405261T patent/ATE368507T1/en not_active IP Right Cessation
- 2005-03-23 EP EP05405261A patent/EP1588757B1/en active Active
- 2005-03-23 DE DE502005001119T patent/DE502005001119D1/en active Active
- 2005-03-23 ES ES05405261T patent/ES2290872T3/en active Active
- 2005-04-21 CN CNB2005100676091A patent/CN100478058C/en active Active
- 2005-04-21 JP JP2005123938A patent/JP4686246B2/en not_active Expired - Fee Related
- 2005-04-25 US US11/113,522 patent/US7322740B2/en active Active
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| CA2500637C (en) | 2013-06-25 |
| JP4686246B2 (en) | 2011-05-25 |
| US7322740B2 (en) | 2008-01-29 |
| CN1695780A (en) | 2005-11-16 |
| JP2005305436A (en) | 2005-11-04 |
| EP1588757A1 (en) | 2005-10-26 |
| US20050237856A1 (en) | 2005-10-27 |
| EP1588757B1 (en) | 2007-08-01 |
| CN100478058C (en) | 2009-04-15 |
| TW200600184A (en) | 2006-01-01 |
| ATE368507T1 (en) | 2007-08-15 |
| DE502005001119D1 (en) | 2007-09-13 |
| TWI354577B (en) | 2011-12-21 |
| ES2290872T3 (en) | 2008-02-16 |
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