EP1238698B1 - Static mixer - Google Patents

Static mixer Download PDF

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Publication number
EP1238698B1
EP1238698B1 EP02000849A EP02000849A EP1238698B1 EP 1238698 B1 EP1238698 B1 EP 1238698B1 EP 02000849 A EP02000849 A EP 02000849A EP 02000849 A EP02000849 A EP 02000849A EP 1238698 B1 EP1238698 B1 EP 1238698B1
Authority
EP
European Patent Office
Prior art keywords
static mixer
mixing
mixing elements
pitch
mixer according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02000849A
Other languages
German (de)
French (fr)
Other versions
EP1238698A1 (en
Inventor
Amir Assadi
Jürgen Grün
Jakob Rainer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fischerwerke Artur Fischer GmbH and Co KG
Original Assignee
Fischerwerke Artur Fischer GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fischerwerke Artur Fischer GmbH and Co KG filed Critical Fischerwerke Artur Fischer GmbH and Co KG
Publication of EP1238698A1 publication Critical patent/EP1238698A1/en
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Publication of EP1238698B1 publication Critical patent/EP1238698B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4314—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles
    • B01F25/43141—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles composed of consecutive sections of helical formed elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/50—Movable or transportable mixing devices or plants
    • B01F33/501—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use
    • B01F33/5011—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use portable during use, e.g. hand-held

Definitions

  • the invention relates to a static mixer for mixing a plurality of, in particular pasty material components, having the features of the preamble of claim 1.
  • a static mixer is known from DE 2 262 016.
  • the static mixer is particularly intended for mixing a hardener and a binder of a synthetic resin mortar. In principle, more than two material components can also be mixed.
  • the material components are, for example, from a cartridge off and pressed through the static mixer.
  • Such static mixers are known per se. They have a tube as a housing, which forms a passageway. In the tube or passage channel helical mixing elements are arranged one behind the other.
  • the mixing elements can also be understood as axial sections of a single, continuous mixing element.
  • the passages may be recesses or breakouts of the mixing elements.
  • the passages are achieved by an angular offset of mutually facing end and initial edges of successive mixing elements and / or by an axial distance of successive mixing elements.
  • the invention has for its object to further develop a static mixer of the type described above so that a compressive force is reduced and mixing is improved.
  • the static mixer according to the invention with the features of claim 1 has Mixing elements with gradients of different sizes.
  • the different sized slopes cause different flow velocities through the static mixer of pressed material components, whereby mixing is improved.
  • a homogeneous mixing of material components with different viscosities can be achieved.
  • mixing elements with larger and smaller pitch alternate.
  • a further improvement of the mixing of the material components is achieved in that mixing elements are provided with different pitch direction (right or left hand), which give the material components pressed through the static mixer a right or left twist.
  • the mixing elements arranged one behind the other alternately have a different pitch direction.
  • An embodiment of the invention provides that mutually facing starting and ending edges of mixing elements arranged one behind the other are angularly offset from one another. A reduction of the pressing force of the material components by the static mixer and a good mixing is achieved by optimizing the geometric relationships of the mixing elements.
  • An embodiment of the invention provides that mixing elements with a small increase in the longitudinal direction of the static mixer are shorter than mixing elements with a large gradient. The small pitch mixing elements impart greater swirl to the extruded material components than the high pitch mixing elements. This makes it possible to achieve a reduction in the press-through force.
  • mixing elements with a small pitch have a length which corresponds approximately to 0.5 times a transverse or diameter of the passage of the static mixer.
  • the mixing elements with a large pitch have a length which corresponds approximately to 0.9 to 1.0 times the transverse or diameter of the passage channel of the static mixer.
  • a mixing element has a twist angle of approximately 180 °.
  • twist angle is meant the angle by which a mixing element is twisted around itself in its longitudinal direction. At a twist angle of 180 ° are the beginning and end edge of the mixing element parallel to each other.
  • the mixing elements with small and large pitch can have the same angle of rotation.
  • FIGURE shows a static mixer according to the invention.
  • the static mixer 10 has an injection cannula 12, which forms a tubular housing of the static mixer 10.
  • An interior of the injection cannula 12 forms a passage channel 14 for pressing through to be mixed material components.
  • the injection cannula 12 has an internal thread 15 for screwing onto a cartridge, not shown, or the like.
  • Container from which the material components to be mixed can be pressed out and can be pressed through the injection cannula 12.
  • the injection cannula 12 may be conical.
  • mixing elements 16 with a small pitch and mixing elements 18 with a large pitch alternate each other.
  • the direction of the slope of the mixing elements 16 with a small pitch is opposite to the direction of the slope of the mixing elements 18 with a large pitch, it is the mixing elements 16 with small pitch to the right and the mixing elements 18 with large pitch left-handed or vice versa.
  • An axial length of the mixing elements 16 with a small pitch is shorter than an axial length of the mixing elements 18 with a large pitch.
  • the axial length of the small pitch mixing elements 16 is approximately 0.5 times a diameter of the passageway 14, and the axial length of the high pitch mixing elements 18 is approximately 0.9 to 1.0 pitch.
  • Both the mixing elements 16 with small pitch and the mixing elements 18 with high pitch have a twist angle over its axial length of approximately 180 °, so it is the one the end of the injection cannula 12 or the inner thread 15 facing the starting edge 20 approximately parallel to a front end of the injection cannula 12 facing end edge 22 of each mixing element 16, 18.
  • mutually facing end and beginning edges 20, 22 successive mixing elements 16, 18 are in aligned at right angles to each other, so they have an angular offset of about 90 °.
  • the mixing elements 16, 18 are integrally with each other, for example. Made by spreader casting of plastic.
  • the cartridge contains two separate components, for example a binder and a hardener of a 2-component synthetic resin mortar.
  • the two components are pasty and can have different viscosities.
  • the two components are pressed out of the cartridge together and in a predetermined volume ratio to each other. It is also possible for more than two material components to be pressed through the static mixer 10 according to the invention and thereby mixed with one another.
  • the material components are divided at the initial edges 20 of the mixing elements 16, 18 in two strands of material and merged at the passages 24 between the end and Conversesrändem 22 successively mixing elements 16, 18 again. Since the mixing elements 16, 18 are alternately right- and left-handed, a twist imposed on the pressed-through material strands by the screw shape of the mixing elements 16, 18 at the transition from a mixing element 16, 18 to the subsequent mixing element 18, 16, ie in the region of the passages 24 between the mixing elements 16, 18, vice versa. The previously split strands of material are brought together during the merging and thereby mixed together.
  • the flow rate of the material strands and the material components when pressed by the static mixer 10 according to the invention changes.
  • the flow rate increases and decreases alternately repeatedly over the length of the static mixer 10. This causes a thorough mixing of the material components.

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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)
  • Disintegrating Or Milling (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The static mixer (10) contains screw-like mixing sections (16, 18) of differing pitch. Preferred Features: The mixing sections form a sequence alternating between greater and lesser pitch. Their pitches differ. The mixing sections differ in their sense of rotation. The initial edge of one section, is offset at an angle with respect to the terminal edge of the preceding section. Mixing sections with smaller pitch, are shorter than those with greater pitch, measured along the length of the channel (14). The sections of smaller pitch, have a length about 0.5 times the channel diameter. Those with greater pitch have a length of 0.9-1 times the channel diameter. A mixing section has an angle of rotation of about 180 degrees .

Description

Die Erfindung betrifft einen Statikmischer zum Mischen mehrerer, insbesondere pastöser Materialkomponenten, mit den Merkmalen des Oberbegriffs des Anspruchs 1. Ein solcher Statikmischer ist aus der DE 2 262 016 bekannt. Der Statikmischer ist insbesondere zum Mischen eines Härters und eines Binders eines Kunstharzmörtels vorgesehen. Es können grundsätzlich auch mehr als zwei Materialkomponenten gemischt werden. Die Materialkomponenten werden bspw. aus einer Kartusche aus- und durch den Statikmischer durchgepresst.The invention relates to a static mixer for mixing a plurality of, in particular pasty material components, having the features of the preamble of claim 1. Such a static mixer is known from DE 2 262 016. The static mixer is particularly intended for mixing a hardener and a binder of a synthetic resin mortar. In principle, more than two material components can also be mixed. The material components are, for example, from a cartridge off and pressed through the static mixer.

Derartige Statikmischer sind an sich bekannt. Sie weisen ein Rohr als Gehäuse auf, das einen Durchlasskanal bildet. In dem Rohr bzw. Durchlasskanal sind schneckenförmige Mischelemente hintereinander angeordnet. Die Mischelemente können auch als Axialabschnitte eines einzigen, durchgehenden Mischelements verstanden werden. Innerhalb der Mischelemente und/oder zwischen diesen bestehen Durchlässe zum Zusammenführen von Materialsträngen, die zuvor von einem Mischelement in die Materialstränge geteilt worden sind. Die Durchlässe können Ausnehmungen oder Ausbrechungen der Mischelemente sein. Vorzugsweise werden die Durchlässe durch einen Winkelversatz einander zugewandter End- und Anfangsränder aufeinander folgender Mischelemente und/oder durch einen Axialabstand aufeinander folgender Mischelemente erreicht. Durch die Mischelemente werden durch den Statikmischer durchgepresste Materialkomponenten wiederholt in Materialstränge geteilt und wieder zusammengeführt und dadurch vermischt.Such static mixers are known per se. They have a tube as a housing, which forms a passageway. In the tube or passage channel helical mixing elements are arranged one behind the other. The mixing elements can also be understood as axial sections of a single, continuous mixing element. Within the mixing elements and / or between them are passages for merging strands of material that have been previously divided by a mixing element in the material strands. The passages may be recesses or breakouts of the mixing elements. Preferably, the passages are achieved by an angular offset of mutually facing end and initial edges of successive mixing elements and / or by an axial distance of successive mixing elements. By the mixing elements by the static mixer pressed material components are repeatedly divided into strands of material and merged again and thereby mixed.

Der Erfindung liegt die Aufgabe zugrunde, einen Statikmischer der vorstehend erläuterten Art so weiter zu entwickeln, dass eine Durchpresskraft verringert und eine Durchmischung verbessert wird.The invention has for its object to further develop a static mixer of the type described above so that a compressive force is reduced and mixing is improved.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst. Der erfindungsgemäße Statikmischer mit den Merkmalen des Anspruchs 1 weist Mischelemente mit unterschiedlich großen Steigungen auf. Die unterschiedlich großen Steigungen bedingen unterschiedliche Fließgeschwindigkeiten durch den Statikmischer durchgepresster Materialkomponenten, wodurch eine Durchmischung verbessert wird. Insbesondere lässt sich ein homogenes Durchmischen von Materialkomponenten mit unterschiedlichen Viskositäten erreichen.This object is achieved by the features of claim 1. The static mixer according to the invention with the features of claim 1 has Mixing elements with gradients of different sizes. The different sized slopes cause different flow velocities through the static mixer of pressed material components, whereby mixing is improved. In particular, a homogeneous mixing of material components with different viscosities can be achieved.

Vorzugsweise wechseln Mischelemente mit größerer und mit kleinerer Steigung einander ab. Eine weitere Verbesserung der Durchmischung der Materialkomponenten wird dadurch erreicht, dass Mischelemente mit unterschiedlicher Steigungsrichtung (rechts- oder linksgängig) vorgesehen werden, die den durch den Statikmischer durchgepressten Materialkomponenten einen Rechts- bzw. Linksdrall verleihen. Vorzugsweise weisen die hintereinander angeordneten Mischelemente abwechselnd eine unterschiedliche Steigungsrichtung auf. Dadurch werden vom Mischelement zuvor geteilte Materialstränge zwingend ineinander geführt und es wird eine gute Durchmischung erreicht.Preferably, mixing elements with larger and smaller pitch alternate. A further improvement of the mixing of the material components is achieved in that mixing elements are provided with different pitch direction (right or left hand), which give the material components pressed through the static mixer a right or left twist. Preferably, the mixing elements arranged one behind the other alternately have a different pitch direction. As a result, previously split material strands are necessarily merged into each other by the mixing element and it is achieved a good mixing.

Eine Ausgestaltung der Erfindung sieht vor, dass einander zugewandte Anfangs- und Endränder hintereinander angeordneter Mischelemente zueinander winkelversetzt sind. Eine Verringerung der Durchpresskraft der Materialkomponenten durch den Statikmischer und eine gute Durchmischung wird durch eine Optimierung der geometrischen Verhältnisse der Mischelemente erreicht. Eine Ausgestaltung der Erfindung sieht vor, dass Mischelemente mit kleiner Steigerung in Längsrichtung des Statikmischer kürzer als Mischelemente mit großer Steigung sind. Die Mischelemente mit kleiner Steigung geben den durchgepressten Materialkomponenten einen größeren Drall als die Mischelemente mit großer Steigung. Dadurch lässt sich eine Verringerung der Durchpresskraft erreichen. Als günstig in Bezug auf eine geringe Durchpresskraft bei guter Durchmischung der Materialkomponenten hat sich eine Ausgestaltung erwiesen, bei der Mischelemente mit kleiner Steigung eine Länge aufweisen, die etwa dem 0,5-fachen eines Quer- bzw. Durchmessers des Durchlasskanals des Statikmischers entspricht. Ebenso hat es sich als günstig erwiesen, wenn die Mischelemente mit großer Steigung eine Länge aufweisen, die etwa dem 0,9 bis 1,0-fachen des Quer- bzw. Durchmessers des Durchlasskanals des Statikmischers entspricht.An embodiment of the invention provides that mutually facing starting and ending edges of mixing elements arranged one behind the other are angularly offset from one another. A reduction of the pressing force of the material components by the static mixer and a good mixing is achieved by optimizing the geometric relationships of the mixing elements. An embodiment of the invention provides that mixing elements with a small increase in the longitudinal direction of the static mixer are shorter than mixing elements with a large gradient. The small pitch mixing elements impart greater swirl to the extruded material components than the high pitch mixing elements. This makes it possible to achieve a reduction in the press-through force. As favorable in relation to a low press-through force with good mixing of the material components, an embodiment has been found in which mixing elements with a small pitch have a length which corresponds approximately to 0.5 times a transverse or diameter of the passage of the static mixer. Likewise, it has proved to be advantageous if the mixing elements with a large pitch have a length which corresponds approximately to 0.9 to 1.0 times the transverse or diameter of the passage channel of the static mixer.

Bei einer Ausgestaltung der Erfindung weist ein Mischelement einen Verdrehwinkel von ungefähr 180° auf. Mit Verdrehwinkel ist der Winkel gemeint, um den ein Mischelement in seiner Längsrichtung um sich selbst verdreht ist. Bei einem Verdrehwinkel von 180° sind Anfangs- und Endrand des Mischelements parallel zueinander. Die Mischelemente mit kleiner und mit großer Steigung können den gleichen Verdrehwinkel aufweisen.In one embodiment of the invention, a mixing element has a twist angle of approximately 180 °. By twist angle is meant the angle by which a mixing element is twisted around itself in its longitudinal direction. At a twist angle of 180 ° are the beginning and end edge of the mixing element parallel to each other. The mixing elements with small and large pitch can have the same angle of rotation.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Die einzige Figur zeigt einen erfindungsgemäßen Statikmischer.The invention will be explained in more detail with reference to an embodiment shown in the drawing. The single FIGURE shows a static mixer according to the invention.

Der erfindungsgemäße Statikmischer 10 weist eine Injektionskanüle 12 auf, die ein rohrförmiges Gehäuse des Statikmischers 10 bildet. Ein Innenraum der Injektionskanüle 12 bildet einen Durchlasskanal 14 zum Durchpressen zu mischender Materialkomponenten. An einem hinteren Ende weist die Injektionskanüle 12 ein Innengewinde 15 zum Aufschrauben auf eine nicht dargestellte Kartusche oder dgl. Behälter auf, aus der die zu mischenden Materialkomponenten auspressbar und durch die Injektionskanüle 12 durchpressbar sind. Zum Entformen aus einem Spritzgießwerkzeug oder dgl. und/oder zum Einlegen von Mischelementen kann die Injektionskanüle 12 konisch ausgeführt sein.The static mixer 10 according to the invention has an injection cannula 12, which forms a tubular housing of the static mixer 10. An interior of the injection cannula 12 forms a passage channel 14 for pressing through to be mixed material components. At a rear end, the injection cannula 12 has an internal thread 15 for screwing onto a cartridge, not shown, or the like. Container from which the material components to be mixed can be pressed out and can be pressed through the injection cannula 12. For removal from an injection mold or the like and / or for insertion of mixing elements, the injection cannula 12 may be conical.

Im Durchlasskanal 14 der Injektionskanüle 12 liegen eine Anzahl schneckenförmiger Mischelemente 16, 18 ein, die axial hintereinander angeordnet sind. Dabei wechseln Mischelemente 16 mit kleiner Steigung und Mischelemente 18 mit großer Steigung einander ab. Die Richtung der Steigung der Mischelemente 16 mit kleiner Steigung ist der Richtung der Steigung der Mischelemente 18 mit großer Steigung entgegengerichtet, es sind die Mischelemente 16 mit kleiner Steigung rechtsgängig und die Mischelemente 18 mit großer Steigung linksgängig oder umgekehrt. Eine axiale Länge der Mischelemente 16 mit kleiner Steigung ist kürzer als eine axiale Länge der Mischelemente 18 mit großer Steigung. Im dargestellten und beschrieben Ausführungsbeispiel der Erfindung beträgt die axiale Länge der Mischelemente 16 mit kleiner Steigung ungefähr das 0,5-fache eines Durchmessers des Durchlasskanals 14, die axiale Länge der Mischelemente 18 mit großer Steigung beträgt ungefähr das 0,9 bis 1,0-fache des Durchmessers des Durchlasskanals 14. Sowohl die Mischelemente 16 mit kleiner Steigung als auch die Mischelemente 18 mit großer Steigung weisen einen Verdrehwinkel über ihre axiale Länge von ungefähr 180° auf, es ist also ein dem hinteren Ende der Injektionskanüle 12 bzw. dem Innengewinde 15 zugewandter Anfangsrand 20 in etwa parallel zu einem einem vorderen Ende der Injektionskanüle 12 zugewandten Endrand 22 jedes Mischelementes 16, 18. Einander zugewandte End- und Anfangsränder 20, 22 aufeinander folgender Mischelemente 16, 18 sind in etwa rechtwinklig zueinander ausgerichtet, sie weisen also einen Winkelversatz von ca. 90° auf. Durch die einander kreuzende Anordnung der einander zugewandten Anfangs- und Endränder 20, 22 hintereinander angeordneter Mischelemente 16, 18 sind Durchlässe 24 zwischen den Mischelementen 16, 18 gebildet. Die Mischelemente 16, 18 sind einstückig miteinander bspw. durch Spreizgießen aus Kunststoff hergestellt.In the passage 14 of the injection cannula 12 are a number of helical mixing elements 16, 18, which are arranged axially one behind the other. In this case, mixing elements 16 with a small pitch and mixing elements 18 with a large pitch alternate each other. The direction of the slope of the mixing elements 16 with a small pitch is opposite to the direction of the slope of the mixing elements 18 with a large pitch, it is the mixing elements 16 with small pitch to the right and the mixing elements 18 with large pitch left-handed or vice versa. An axial length of the mixing elements 16 with a small pitch is shorter than an axial length of the mixing elements 18 with a large pitch. In the illustrated and described embodiment of the invention, the axial length of the small pitch mixing elements 16 is approximately 0.5 times a diameter of the passageway 14, and the axial length of the high pitch mixing elements 18 is approximately 0.9 to 1.0 pitch. Both the mixing elements 16 with small pitch and the mixing elements 18 with high pitch have a twist angle over its axial length of approximately 180 °, so it is the one the end of the injection cannula 12 or the inner thread 15 facing the starting edge 20 approximately parallel to a front end of the injection cannula 12 facing end edge 22 of each mixing element 16, 18. Mutually facing end and beginning edges 20, 22 successive mixing elements 16, 18 are in aligned at right angles to each other, so they have an angular offset of about 90 °. Through the intersecting arrangement of the mutually facing beginning and end edges 20, 22 arranged in succession mixing elements 16, 18 passages 24 between the mixing elements 16, 18 are formed. The mixing elements 16, 18 are integrally with each other, for example. Made by spreader casting of plastic.

Die Kartusche enthält getrennt voneinander zwei Komponenten, bspw. einen Binder und einen Härter eines 2-Komponenten-Kunstharzmörtels. Die beiden Komponenten sind pastös und können unterschiedliche Viskositäten aufweisen. Die beiden Komponenten werden gemeinsam und in einem vorgegebenen Volumenverhältnis zueinander aus der Kartusche ausgepresst. Es können auch mehr als zwei Materialkomponenten durch den erfindungsgemäßen Statikmischer 10 durchgepresst und dabei miteinander vermischt werden.The cartridge contains two separate components, for example a binder and a hardener of a 2-component synthetic resin mortar. The two components are pasty and can have different viscosities. The two components are pressed out of the cartridge together and in a predetermined volume ratio to each other. It is also possible for more than two material components to be pressed through the static mixer 10 according to the invention and thereby mixed with one another.

Beim Durchpressen durch den Statikmischer 10 werden die Materialkomponenten an den Anfangsrändern 20 der Mischelemente 16, 18 in zwei Materialstränge geteilt und an den Durchlässen 24 zwischen den End- und Anfangsrändem 22 hintereinander angeordneter Mischelemente 16, 18 wieder zusammengeführt. Da die Mischelemente 16, 18 abwechselnd rechts- und linksgängig sind, wird ein den durchgepressten Materialsträngen durch die Schneckenform der Mischelemente 16, 18 aufgezwungener Drall am Übergang von einem Mischelement 16, 18 zum nachfolgenden Mischelement 18, 16, also im Bereich der Durchlässe 24 zwischen den Mischelementen 16, 18, umgekehrt. Die zuvor geteilten Materialstränge werden beim Zusammenführen ineinandergeführt und dadurch miteinander vermischt. Durch die unterschiedliche Steigung der Mischelemente 16, 18 ändert sich die Fließgeschwindigkeit der Materialstränge und der Materialkomponenten beim Durchpressen durch den erfindungsgemäßen Statikmischer 10. Die Fließgeschwindigkeit erhöht und verringert sich abwechselnd mehrfach wiederholt über die Länge des Statikmischers 10. Dies bewirkt eine gute Durchmischung der Materialkomponenten.When being pressed through the static mixer 10, the material components are divided at the initial edges 20 of the mixing elements 16, 18 in two strands of material and merged at the passages 24 between the end and Anfangsrändem 22 successively arranged mixing elements 16, 18 again. Since the mixing elements 16, 18 are alternately right- and left-handed, a twist imposed on the pressed-through material strands by the screw shape of the mixing elements 16, 18 at the transition from a mixing element 16, 18 to the subsequent mixing element 18, 16, ie in the region of the passages 24 between the mixing elements 16, 18, vice versa. The previously split strands of material are brought together during the merging and thereby mixed together. Due to the different pitch of the mixing elements 16, 18, the flow rate of the material strands and the material components when pressed by the static mixer 10 according to the invention changes. The flow rate increases and decreases alternately repeatedly over the length of the static mixer 10. This causes a thorough mixing of the material components.

Claims (9)

  1. Static mixer for mixing a plurality of material components which are especially in paste form, having helical mixing elements arranged behind one another in a through-channel and having passageways for the bringing together of strands of material which have previously been divided up into the strands of material by a mixing element, characterised in that the static mixer (10) has mixing elements (16, 18) which have slopes of different degree.
  2. Static mixer according to claim 1, characterised in that the mixing elements (16, 18) arranged behind one another have a relatively large slope and a relatively small slope in alternating manner.
  3. Static mixer according to claim 1, characterised in that the static mixer (10) has mixing elements (16, 18) having different directions of slope.
  4. Static mixer according to claim 3, characterised in that the mixing elements (16, 18) arranged behind one another have different directions of slope in alternating manner.
  5. Static mixer according to claim 1, characterised in that a leading edge (20) of a downstream mixing element (16, 18) is offset at an angle to a trailing edge (22) of an upstream mixing element (16, 18).
  6. Static mixer according to claim 1, characterised in that mixing elements (16) having a relatively small slope are shorter in the longitudinal direction of the through-channel (14) than mixing elements (18) having a relatively large slope.
  7. Static mixer according to claim 6, characterised in that mixing elements (16) having a relatively small slope have a length that is about 0.5 times the transverse dimension of the through-channel (14).
  8. Static mixer according to claim 6, characterised in that mixing elements (18) having a relatively large slope have a length that is about 0.9 to 1.0 times the transverse dimension of the through-channel (14).
  9. Static mixer according to claim 1, characterised in that a mixing element (16, 18) has a turning angle of approximately 180°.
EP02000849A 2001-03-07 2002-01-15 Static mixer Expired - Lifetime EP1238698B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20103983U 2001-03-07
DE20103983U DE20103983U1 (en) 2001-03-07 2001-03-07 static mixer

Publications (2)

Publication Number Publication Date
EP1238698A1 EP1238698A1 (en) 2002-09-11
EP1238698B1 true EP1238698B1 (en) 2004-12-29

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EP (1) EP1238698B1 (en)
AT (1) ATE285837T1 (en)
CZ (1) CZ2002853A3 (en)
DE (2) DE20103983U1 (en)
DK (1) DK1238698T3 (en)
ES (1) ES2233720T3 (en)
HU (1) HU222906B1 (en)
PL (1) PL352647A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1670409A1 (en) * 2003-09-30 2006-06-21 Coloplast A/S A wound care device
CZ302452B6 (en) * 2004-04-14 2011-05-25 Tvrdík@Jaroslav Static spiral mixer
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HUP0200380A3 (en) 2003-04-28
EP1238698A1 (en) 2002-09-11
DE20103983U1 (en) 2002-07-11
DE50201865D1 (en) 2005-02-03
HUP0200380A2 (en) 2003-01-28
ATE285837T1 (en) 2005-01-15
PL352647A1 (en) 2002-09-09
HU0200380D0 (en) 2002-03-28
DK1238698T3 (en) 2005-02-07
HU222906B1 (en) 2003-12-29
CZ2002853A3 (en) 2002-10-16
ES2233720T3 (en) 2005-06-16

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