EP1149627B1 - Dynamic mixer - Google Patents

Dynamic mixer Download PDF

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Publication number
EP1149627B1
EP1149627B1 EP01106102A EP01106102A EP1149627B1 EP 1149627 B1 EP1149627 B1 EP 1149627B1 EP 01106102 A EP01106102 A EP 01106102A EP 01106102 A EP01106102 A EP 01106102A EP 1149627 B1 EP1149627 B1 EP 1149627B1
Authority
EP
European Patent Office
Prior art keywords
mixing
dynamic mixer
mixer according
mixing blade
chamber part
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
EP01106102A
Other languages
German (de)
French (fr)
Other versions
EP1149627A2 (en
EP1149627A3 (en
Inventor
Alfred Von Schuckmann
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.)
Kulzer GmbH
Original Assignee
Heraeus Kulzer GmbH
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
Priority claimed from DE10015133A external-priority patent/DE10015133C1/en
Priority claimed from DE10043489A external-priority patent/DE10043489A1/en
Application filed by Heraeus Kulzer GmbH filed Critical Heraeus Kulzer GmbH
Priority to DK01106102T priority Critical patent/DK1149627T3/en
Publication of EP1149627A2 publication Critical patent/EP1149627A2/en
Publication of EP1149627A3 publication Critical patent/EP1149627A3/en
Application granted granted Critical
Publication of EP1149627B1 publication Critical patent/EP1149627B1/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
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0722—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis perpendicular with respect to the rotating axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0724—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis directly mounted on the rotating axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/50—Mixing receptacles
    • B01F35/52—Receptacles with two or more compartments
    • B01F35/522—Receptacles with two or more compartments comprising compartments keeping the materials to be mixed separated until the mixing is initiated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/19—Mixing dentistry compositions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/2305—Mixers of the two-component package type, i.e. where at least two components are separately stored, and are mixed in the moment of application
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1125—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis
    • B01F27/11251—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis having holes in the surface

Definitions

  • the invention relates to a dynamic mixer, in particular for viscous dental materials, with: a chamber part, with a discharge opening at the front end of the chamber part, with a closure part arranged at the rear end of the chamber part with inlet openings for individual components to be introduced, and a central bore for a mixing element which can be rotated in the chamber part about its longitudinal axis.
  • static mixer includes such to understand, which contain fixed mixing devices for example flow pins, which the individual materials to be mixed flow past and swirl and other interference.
  • dynamic mixer are to be understood as those, the active mixing devices, for example in the form of rotating Mixing blades included. In these, the components to be mixed are replaced by active ones Transport mixed together.
  • Static mixers are less with tough consistencies due to the high friction loss suitable, which is why mixers with rotating mixing elements are used in such cases.
  • EP 0 492 412 B1 discloses a dynamic mixer which essentially has a housing Cylindrical chamber part includes a discharge opening at its front end for the mixture, a closing body provided at the rear end of the chamber part with protruding pipe pins behind for direct insertion into outlet openings of the storage containers containing the components to be mixed, and one in the Has chamber part rotatable about the longitudinal axis of the mixer element that with its rear End is rotatably mounted in a bore of the end body.
  • the mixing element at least one wiper carries, with a cutting edge pointing forward in the direction of rotation, the front surface of the Cover plate sweeps, and a rising in the discharge direction on the cutting edge Adjoining the inclined surface.
  • a disadvantage of this mixer is u. a. the fact that it is a partially uncontrolled Escape of the components to be mixed between the end body and the rotating mixer element due to leaks. In addition, the degree of homogenization not satisfactory in every case, since the individual components adapt to the Push the mixer element past the molded mixer blades.
  • this problem is solved by a dynamic mixer according to claim 1 solved.
  • the dynamic mixer according to the invention has a chamber part, a discharge opening on front end of the chamber part, a closure part arranged at the rear end of the chamber part with inlet openings for individual components to be inserted and a central one Bore for a mixing element, which is rotatable in the chamber part about its longitudinal axis.
  • the Mixing element has at least two inches on its side facing the closure part In the longitudinal direction one behind the other mixing blades arranged with respect to the wall of the Chamber part are not designed to strip material, and the axially free passages have, wherein in the axial direction the passages of a mixing wing through each not free part of the other mixing wing are covered.
  • not stripping material is to understand the fact that the mixing blades used are not wall-accessible and act as a scraper, but keep a certain distance from the individual walls.
  • the staggered arrangement of the mixing blades ensures that Material not recorded by the first mixing blade with a very high probability by the second Mixing blades are gripped, sheared and then mixed with the other components.
  • the closure part there is essentially one that encompasses the rear end of the mixing element arranged in the longitudinal direction inner sleeve, which extends almost to the first Mixing wing extends.
  • the sleeve increases the stator area (under the term Stator surface "are all fixed and for the mixing of the individual components necessary surfaces) and the sealing surface (under the term “sealing surface” are to be understood as areas that cause the individual to flow out in an uncontrolled manner Prevent or reduce constituents or the mixed constituents to the outside and thus perform a sealing function). Due to the arrangement as at the rear end of the A high sealing effect can be achieved by the sleeve encompassing the mixing element.
  • the mixing blades have no rise in the longitudinal direction in which they are spread are formed (i.e. have no inclined blades in the plane of rotation), because in this way there is no discharge effect when the mixing blades rotate and thus the mixing element and its connection point to the drive axis of a not too high one are exposed to mechanical stress. Discharge is only done by pressing in the longitudinal direction of the chamber part accomplished.
  • the first arranged at the rear end of the chamber part Mixing wing molded in the direction of the closure part in the longitudinal direction such at least one mixing pin is that the viscous material entering from the inlet openings is free of cuts is elapsed, since this enables a very high shear rate.
  • At least one essentially in the longitudinal direction is advantageously on the closure part Aligned inner pin arranged as a flow disruptor to increase the mixing effect serves.
  • the first mixing wing is advantageously dome-shaped in the deploying longitudinal direction trained to in this way a low mixing and dead volume in dynamic Mixer remaining amount (after use) between the first and second To provide mixing blades.
  • the first mixing wing has inner and / or outer recesses has to ensure a better material throughput.
  • the inner recesses can be configured, for example, in the form of circles or ellipses, while the outer recesses, for example semicircular or parabolic circular segments can represent.
  • the second mixing wing for example, outer recesses in the form of circular segments to ensure a higher material throughput.
  • the second mixing blade has a material reinforcement in the longitudinal direction of the chamber part, for example in the form of a doubled round cross, in order in this way and Way to provide material redundancy for high mechanical resilience.
  • the mixing element has at least one in the extending longitudinal direction third mixing paddle, the one for further homogenization of the mix to be spread Material.
  • in at least one inlet opening at least one transverse to the Passage-oriented web-shaped element is arranged so that any hardening when removing the used mixer from the tubular bag / cartridge be pulled out with.
  • Web-shaped elements that have oval, diamond, are elliptical, polygonal or circular.
  • Sprayable plastics such as polyethylene, polypropylene or polystyrene have been found in particular Proven for housing and end body (chamber part or closure part).
  • plastics such as B. polyamide, polyoxymethylene or other impact-resistant polymers / blends advantageous.
  • FIG. 1 shows a cross section through a dynamic mixer according to the invention.
  • the dynamic mixer has a chamber part 1, a discharge opening 13 at the front end of the chamber part 1, a closure part 2 arranged at the rear end of the chamber part 1 Inlet openings 11 for individual components to be introduced and a central bore for a mixing element and a mixing element 3 rotatable about its longitudinal axis in the chamber part 1 on.
  • the mixing element 3 has two in the longitudinal direction one behind the other and radially offset in this way arranged stripping function-free mixing blades 5, 6 that the free passages of the first Mixing wing 5 are covered by the second mixing wing 6.
  • On the closure part 2 is in arranged essentially in the longitudinal direction of the sleeve 4, which is the rear end of the Mixing element 3 encompasses.
  • the mixing blades 5, 6 are designed to be free of rises in the deploying longitudinal direction (none at an angle provided wing blades).
  • the first mixing wing 5 is in the direction of the closure part 2 in the longitudinal direction a mixing pin 10 integrally formed.
  • the first mixing blade 5 does not run in the chamber part 1, d. H. it does not touch the housing wall 9 and forms between this and the first Mixing blades 5 two spacing volumes 7.
  • the closure part 2 has a rear base plate 8 on.
  • the mixing element 3 has four third mixing blades 14, 15, 16, 17 in the dispensing direction on.
  • FIG. 2 shows an excerpted cross section with respect to a further variant of the mixer according to the invention.
  • two pins 12 which are oriented essentially in the longitudinal direction are arranged on the closure part 2.
  • Figure 3 shows a cross section of a mixing element.
  • the mixing element 3 consists essentially of two in the longitudinal direction and one behind the other radially offset staggered mixing blades 5, 6, the free ones Passages of the first mixing wing 5 are covered by the second mixing wing 6. In spreading In the longitudinal direction, the mixing element 3 has four further third mixing blades 14, 15, 16, 17 on.
  • FIG. 4 shows a top view of a first mixing wing.
  • the first mixing blade 5 has inner and outer recesses 18, 19.
  • Figure 5 shows a plan view of a second mixing blade.
  • the second mixing blade 6 has a material reinforcement 21 in the longitudinal direction of the chamber part 1 and outer recesses 20.
  • Figures 6 and 7 show a cross section or a sketchy bottom view of the invention Mixer.
  • An inlet opening 11 has a diamond-shaped, transverse to the flow direction aligned web-shaped element 22.

Abstract

Dynamic mixer has a mixing element (3) with mixing wings (5, 6) arranged on the side facing the closing part (2). The wings are non material-stripping with respect to the wall of the chamber part (1) and have axially free recesses, where the recesses of one wing are covered by the non-free part of the other wing. An inner sleeve (4) which extends up to the first mixing wing is arranged on the closing part. Preferred Features: The mixing wings are arranged in the longitudinal direction. An inner peg (12) is arranged on the closing part. The first mixing wing has inner and/or outer recesses and the second mixing wing has only outer recesses. The mixer has a third mixing wing (14, 15, 16, 17).

Description

Die Erfindung betrifft einen dynamischen Mischer, insbesondere für viskose Dentalmaterialien, mit:
   einem Kammerteil, mit einer Ausbringöffnung am vorderen Ende des Kammerteils, mit einem am hinteren Ende des Kammerteils angeordneten Verschlussteil mit Eintrittsöffnungen für einzubringende Einzelkomponenten sowie einer zentrischen Bohrung für ein Mischelement, das im Kammerteil um seine Längsachse drehbar ist.The invention relates to a dynamic mixer, in particular for viscous dental materials, with:
a chamber part, with a discharge opening at the front end of the chamber part, with a closure part arranged at the rear end of the chamber part with inlet openings for individual components to be introduced, and a central bore for a mixing element which can be rotated in the chamber part about its longitudinal axis.

Beim maschinellen kontinuierlichen Anmischen von Mehrkomponentenmaterialien, beispielsweise von Klebstoffen oder dentalen Abdruckmassen, ist es üblich, je nach Konsistenz dynamische oder statische Mischer zu verwenden. Unter dem Begriff "statischer Mischer" sind solche zu verstehen, die feststehende Mischeinrichtungen beispielsweise Strömungsstifte enthalten, an denen die zu vermischenden einzelnen Materialien vorbeiströmen und sich durch Verwirbelung und anderen Störungen miteinander mischen. Unter dem Begriff "dynamischer Mischer" sind solche zu verstehen, die aktive Mischeinrichtungen beispielsweise in Form von rotierenden Mischflügeln enthalten. Bei diesen werden die zu vermischenden Bestandteile durch aktiven Transport miteinander vermischt.When continuously mixing multicomponent materials, for example of adhesives or dental impression materials, it is common, depending on the consistency dynamic or use static mixers. The term "static mixer" includes such to understand, which contain fixed mixing devices for example flow pins, which the individual materials to be mixed flow past and swirl and other interference. Under the term "dynamic mixer" are to be understood as those, the active mixing devices, for example in the form of rotating Mixing blades included. In these, the components to be mixed are replaced by active ones Transport mixed together.

Statische Mischer sind wegen des hohen Reibungsverlustes bei zähen Konsistenzen weniger geeignet, weshalb in solchen Fällen Mischer mit rotierenden Mischelementen verwendet werden.Static mixers are less with tough consistencies due to the high friction loss suitable, which is why mixers with rotating mixing elements are used in such cases.

In DE 297 05 741 U1 ist ein dynamischer Mischer für zähe Massen, insbesondere für die Komponenten von zahnärztlichen Abdruckmassen, offenbart, der einerseits mit einem Masseausbringgerät verbindbar und andererseits eine Ausbringdüse für das Gemisch bildet oder damit verbindbar ist und ein Mischrohr, eine darin umlaufend antreibbare, mit dem Mischrohr einen ringförmigen Mischkanal bildende Mischerwelle und Mischerflügel umfasst, die ausschließlich von der Mischerwelle etwa radial zur Mischrohrwand vorspringen, wobei der dynamische Mischer dadurch gekennzeichnet ist, dass die radiale Weite des Mischkanals nicht größer als 2 mm ist.DE 297 05 741 U1 describes a dynamic mixer for viscous masses, especially for the components of dental impression materials, disclosed, on the one hand, with a mass application device connectable and on the other hand forms a discharge nozzle for the mixture or so is connectable and a mixing tube, one can be driven circumferentially therein, with the mixing tube one annular mixing channel forming mixer shaft and mixer blades, which exclusively Project from the mixer shaft approximately radially to the mixing tube wall, the dynamic mixer characterized in that the radial width of the mixing channel is not greater than Is 2 mm.

In EP 0 492 412 B1 ist ein dynamischer Mischer offenbart, der ein Gehäuse mit einem im wesentlichen zylindrischen Kammerteil umfasst, der an seinem vorderen Ende einer Ausbringöffnung für das Gemisch, einen am hinteren Ende des Kammerteils vorgesehenen Abschlusskörper mit nach hinter herausragenden Rohrzapfen zum unmittelbaren Einführen in Austrittsöffnungen von die zu mischenden Komponenten enthaltenden Vorratsbehältern, und ein in dem Kammerteil um dessen Längsachse drehbares Mischerelement aufweist, dass mit seinem hinteren Ende in einer Bohrung des Abschlusskörpers drehbar gelagert ist. Dabei ist der Abschlusskörper als Platte ausgebildet, wobei das Mischelement mindestens einen Abstreifer trägt, der mit einer in Drehrichtung nach vorne weisenden Schneidkante die vordere Fläche der Abschlussplatte überstreicht, und sich an die Schneidkante eine in Ausbringrichtung ansteigende Schrägfläche anschliesst.EP 0 492 412 B1 discloses a dynamic mixer which essentially has a housing Cylindrical chamber part includes a discharge opening at its front end for the mixture, a closing body provided at the rear end of the chamber part with protruding pipe pins behind for direct insertion into outlet openings of the storage containers containing the components to be mixed, and one in the Has chamber part rotatable about the longitudinal axis of the mixer element that with its rear End is rotatably mounted in a bore of the end body. Here is the final body formed as a plate, the mixing element at least one wiper carries, with a cutting edge pointing forward in the direction of rotation, the front surface of the Cover plate sweeps, and a rising in the discharge direction on the cutting edge Adjoining the inclined surface.

Nachteilig an diesem Mischer ist u. a. die Tatsache, dass es zu einem teilweise unkontrollierten Austreten der zu mischenden Komponenten zwischen Abschlusskörper und drehbarem Mischerelement aufgrund von Undichtigkeiten kommt. Darüber hinaus ist der Homogenisierungsgrad nicht in jedem Fall befriedigend, da sich die einzelnen Komponenten zu schnell an den am Mischerelement angeformten Mischerflügeln vorbeischieben.A disadvantage of this mixer is u. a. the fact that it is a partially uncontrolled Escape of the components to be mixed between the end body and the rotating mixer element due to leaks. In addition, the degree of homogenization not satisfactory in every case, since the individual components adapt to the Push the mixer element past the molded mixer blades.

Aus dem Vorgenannten ergibt sich das Problem, mit Hilfe eines neuartigen dynamischen Mischers die oben genannten Nachteile zumindest teilweise zu beseitigen. Das der Erfindung zugrundeliegende Problem liegt insbesondere darin, einen preiswert herzustellenden dynamischen Mischer für die Einmalverwendung bei niedrigviskosen bis zähen standfesten Mehrkomponentenmaterialien zu entwickeln, der einen sehr hohen Homogenisierungs- bzw. Dichtigkeitsgrad gewährleistet.The problem arises from the above with the aid of a novel dynamic mixer to at least partially eliminate the disadvantages mentioned above. That of the invention underlying problem is, in particular, a dynamic to produce inexpensive Mixer for single use with low-viscosity to tough, stable multi-component materials to develop a very high degree of homogenization or tightness guaranteed.

Dieses Problem wird erfindungsgemäss durch einen dynamischen Mischer nach Anspruch 1 gelöst.According to the invention, this problem is solved by a dynamic mixer according to claim 1 solved.

Der erfindungsgemäße dynamische Mischer weist ein Kammerteil, eine Ausbringöffnung am vorderen Ende des Kammerteils, ein am hinteren Ende des Kammerteils angeordnetes Verschlussteil mit Eintrittsöffnungen für einzubringende Einzelkomponenten sowie eine zentrische Bohrung für ein Mischelement, das im Kammerteil um seine Längsachse drehbar ist, auf. Das Mischelement weist auf seiner dem Verschlussteil zugewandten Seite mindestens zwei in Längsrichtung hintereinander angeordnete Mischflügel auf, die bezüglich der Wandung des Kammerteils nicht materialabstreifend ausgestaltet sind, und die jeweils axial freie Durchlässe aufweisen, wobei in axialer Richtung die Durchlässe eines Mischflügels jeweils durch den nicht freien Teil des anderen Mischflügels abgedeckt sind. Unter dem Begriff "nicht Material abstreifend" ist die Tatsache zu verstehen, dass die eingesetzten Mischflügel nicht wandgängig sind und als Abstreifer fungieren, sondern einen gewissen Abstand zu den einzelnen Wänden einhalten. Durch die versetzte Anordnung der Mischflügel untereinander wird gewährleistet, dass vom ersten Mischflügel nicht erfasstes Material mit sehr hoher Wahrscheinlichkeit vom zweiten Mischflügel erfasst, geschert und anschließend mit den anderen Komponenten vermischt wird.The dynamic mixer according to the invention has a chamber part, a discharge opening on front end of the chamber part, a closure part arranged at the rear end of the chamber part with inlet openings for individual components to be inserted and a central one Bore for a mixing element, which is rotatable in the chamber part about its longitudinal axis. The Mixing element has at least two inches on its side facing the closure part In the longitudinal direction one behind the other mixing blades arranged with respect to the wall of the Chamber part are not designed to strip material, and the axially free passages have, wherein in the axial direction the passages of a mixing wing through each not free part of the other mixing wing are covered. Under the term "not stripping material" is to understand the fact that the mixing blades used are not wall-accessible and act as a scraper, but keep a certain distance from the individual walls. The staggered arrangement of the mixing blades ensures that Material not recorded by the first mixing blade with a very high probability by the second Mixing blades are gripped, sheared and then mixed with the other components.

Am Verschlussteil ist eine das hintere Ende des Mischelementes umgreifende im wesentlichen in Längsrichtung ausgerichtete innere Hülse angeordnet, die sich nahezu bis zum ersten Mischflügel erstreckt. Die Hülse sorgt für eine Erhöhung der Statorfläche (unter dem Begriff Statorfläche" sind sämtliche stehenden festen und für die Vermischung der einzelnen Komponenten notwendigen Flächen zu verstehen) und der Dichtungsfläche (unter dem Begriff "Dichtungsfläche" sind solche Flächen zu verstehen, die ein unkontrolliertes Herausfließen der einzelnen Bestandteile bzw. der gemischen Bestandteile nach außen verhindern bzw. vermindern und so eine dichtende Funktion ausüben). Durch die Anordnung als am hinteren Ende des Mischelementes umgreifende Hülse ist eine hohe Dichtwirkung erzielbar.At the closure part there is essentially one that encompasses the rear end of the mixing element arranged in the longitudinal direction inner sleeve, which extends almost to the first Mixing wing extends. The sleeve increases the stator area (under the term Stator surface "are all fixed and for the mixing of the individual components necessary surfaces) and the sealing surface (under the term "sealing surface" are to be understood as areas that cause the individual to flow out in an uncontrolled manner Prevent or reduce constituents or the mixed constituents to the outside and thus perform a sealing function). Due to the arrangement as at the rear end of the A high sealing effect can be achieved by the sleeve encompassing the mixing element.

Zunächst ist es vorteilhaft, wenn die Mischflügel in ausbringender Längsrichtung anstiegsfrei ausgebildet sind (d. h. in der Rotationsebene keine schräggestellten Flügelblätter aufweisen), da auf diese Art und Weise keine Austragswirkung bei Rotation der Mischflügel resultiert und somit das Mischelement und deren Verbindungsstelle zur Antriebsachse einer nicht allzu hohen mechanischen Belastung ausgesetzt sind. Ein Austrag wird lediglich durch Pressen in Längsrichtung des Kammerteils bewerkstelligt.First of all, it is advantageous if the mixing blades have no rise in the longitudinal direction in which they are spread are formed (i.e. have no inclined blades in the plane of rotation), because in this way there is no discharge effect when the mixing blades rotate and thus the mixing element and its connection point to the drive axis of a not too high one are exposed to mechanical stress. Discharge is only done by pressing in the longitudinal direction of the chamber part accomplished.

Weiterhin ist es vorteilhaft, dass am am hinteren Ende des Kammerteils angeordneten ersten Mischflügel in Richtung Verschlussteil in Längsrichtung derart mindestens ein Mischzapfen angeformt ist, dass das aus den Eintrittsöffnungen eintretende viskose Material zerschneidungsfrei verstrichen wird, da auf diese Art und Weise eine sehr hohe Scherungsrate ermöglicht wird.Furthermore, it is advantageous that the first arranged at the rear end of the chamber part Mixing wing molded in the direction of the closure part in the longitudinal direction such at least one mixing pin is that the viscous material entering from the inlet openings is free of cuts is elapsed, since this enables a very high shear rate.

Am Verschlussteil ist in vorteilhafter Weise mindestens ein im wesentlichen in Längsrichtung ausgerichteter innerer Zapfen angeordnet, der als Strömungsstörer zur Erhöhung der Mischwirkung dient. At least one essentially in the longitudinal direction is advantageously on the closure part Aligned inner pin arranged as a flow disruptor to increase the mixing effect serves.

Der erste Mischflügel ist in vorteilhafter Weise in ausbringender Längsrichtung kuppelförmig ausgebildet, um auf diese Art und Weise ein geringes Misch- und Totvolumen der im dynamischen Mischer verbleibenden Restmenge (nach Gebrauch) zwischen dem ersten und zweiten Mischflügel bereitzustellen.The first mixing wing is advantageously dome-shaped in the deploying longitudinal direction trained to in this way a low mixing and dead volume in dynamic Mixer remaining amount (after use) between the first and second To provide mixing blades.

Weiterhin ist es von Vorteil, wenn der erste Mischflügel innere und/oder äussere Ausnehmungen aufweist, um einen besseren Materialdurchsatz zu gewährleisten. Die inneren Ausnehmungen können beispielsweise in Form von Kreisen oder Ellipsen ausgestaltet sein, während die äusseren Ausnehmungen beispielsweise halbkreisförmige oder paraboloide Kreissegmente darstellen können.It is also advantageous if the first mixing wing has inner and / or outer recesses has to ensure a better material throughput. The inner recesses can be configured, for example, in the form of circles or ellipses, while the outer recesses, for example semicircular or parabolic circular segments can represent.

Weiterhin ist es von Vorteil, wenn der zweite Mischflügel äussere Ausnehmungen, beispielsweise in Form von Kreissegmenten aufweist, um einen höheren Materialdurchsatz zu gewährleisten.It is also advantageous if the second mixing wing, for example, outer recesses in the form of circular segments to ensure a higher material throughput.

Weiterhin weist der zweite Mischflügel in Längsrichtung des Kammerteils eine Materialverstärkung, beispielsweise in Form eines aufgedoppelten Rundkreuzes, auf, um auf diese Art und Weise eine Materialredundanz zur hohen mechanischen Belastbarkeit bereitzustellen.Furthermore, the second mixing blade has a material reinforcement in the longitudinal direction of the chamber part, for example in the form of a doubled round cross, in order in this way and Way to provide material redundancy for high mechanical resilience.

Darüber hinaus, weist das Mischelement in ausbringender Längsrichtung mindestens einen dritten Mischflügel auf, der zur weiteren Homogenisierung des auszubringenden gemischten Materials dient.In addition, the mixing element has at least one in the extending longitudinal direction third mixing paddle, the one for further homogenization of the mix to be spread Material.

Schließlich ist es von Vorteil, wenn in mindestens einer Eintrittsöffnung mindestens ein quer zur Durchlassöffnung ausgerichtetes stegförmiges Element angeordnet ist, damit eventuelle Aushärtungen beim Abnehmen des gebrauchten Mischers vom Schlauchbeutel/von der Kartusche mit herausgezogen werden.Finally, it is advantageous if in at least one inlet opening at least one transverse to the Passage-oriented web-shaped element is arranged so that any hardening when removing the used mixer from the tubular bag / cartridge be pulled out with.

Besonders bewährt haben sich stegförmige Elemente, die in Durchflussrichtung oval-, rauten-, ellipsen-, vieleck- oder kreisförmig sind.Web-shaped elements that have oval, diamond, are elliptical, polygonal or circular.

Spritzbare Kunststoffe wie Polyethylen, Polypropylen oder Polystyiol haben sich insbesondere für Gehäuse und Abschlusskörper (Kammerteil bzw. Verschlussteil) bewährt. Für den Einsatz bei zäheren Mischungen ist insbesondere beim Mischelement die Verwendung von hochwertigeren Kunststoffen wie z. B. Polyamid, Polyoximethylen oder anderen schlagzäheren Polymeren/Blends vorteilhaft. Sprayable plastics such as polyethylene, polypropylene or polystyrene have been found in particular Proven for housing and end body (chamber part or closure part). For use in the case of tougher mixtures, in particular in the case of the mixing element, the use of higher quality is required Plastics such as B. polyamide, polyoxymethylene or other impact-resistant polymers / blends advantageous.

Die Erfindung wird anhand eines nachfolgenden Beispiels näher erläutert.The invention is explained in more detail using the following example.

Die Zeichnungen zeigen:

Figur 1 -
einen Querschnitt durch einen erfindungsgemässen dynamischen Mischer;
Figur 2 -
einen auszugsweisen Querschnitt bezüglich einer weiteren Variante des erfindungsgemässen Mischers;
Figur 3 -
einen Querschnitt eines Mischelements;
Figur 4 -
eine Aufsicht eines ersten Mischflügels;
Figur 5 -
eine Aufsicht eines zweiten Mischflügels;
Figur 6 -
einen Querschnitt des erfindungsgemäßen dynamischen Mischers und
Figur 7 -
eine skizzenhafte untere Aufsicht des in Figur 6 dargestellten erfindungsgemaßen Mischers.
The drawings show:
Figure 1 -
a cross section through a dynamic mixer according to the invention;
Figure 2 -
a partial cross section with respect to a further variant of the mixer according to the invention;
Figure 3 -
a cross section of a mixing element;
Figure 4 -
a top view of a first mixing wing;
Figure 5 -
a top view of a second mixing wing;
Figure 6 -
a cross section of the dynamic mixer according to the invention and
Figure 7 -
a sketchy bottom view of the mixer according to the invention shown in Figure 6.

In Figur 1 ist ein Querschnitt durch einen erfindungsgemässen dynamischen Mischer abgebildet.1 shows a cross section through a dynamic mixer according to the invention.

Der dynamische Mischer weist ein Kammerteil 1, eine Ausbringöffnung 13 am vorderen Ende des Kammerteils 1, ein am hinteren Ende des Kammerteils 1 angeordnetes Verschlussteil 2 mit Eintrittsöffnungen 11 für einzubringende Einzelkomponenten sowie eine zentrische Bohrung für ein Mischelement und ein um dessen Längsachse im Kammerteil 1 drehbares Mischelement 3 auf. Das Mischelement 3 weist zwei in Längsrichtung hintereinander und radial derart versetzt angeordnete abstreifenfunktionsfreie Mischflügel 5, 6 auf, dass die freien Durchlässe des ersten Mischflügels 5 vom zweiten Mischflügel 6 abgedeckt werden. Am Verschlussteil 2 ist eine im wesentlichen in Längsrichtung ausgerichtete Hülse 4 angeordnet, die das hintere Ende des Mischelements 3 umgreift.The dynamic mixer has a chamber part 1, a discharge opening 13 at the front end of the chamber part 1, a closure part 2 arranged at the rear end of the chamber part 1 Inlet openings 11 for individual components to be introduced and a central bore for a mixing element and a mixing element 3 rotatable about its longitudinal axis in the chamber part 1 on. The mixing element 3 has two in the longitudinal direction one behind the other and radially offset in this way arranged stripping function-free mixing blades 5, 6 that the free passages of the first Mixing wing 5 are covered by the second mixing wing 6. On the closure part 2 is in arranged essentially in the longitudinal direction of the sleeve 4, which is the rear end of the Mixing element 3 encompasses.

Die Mischflügel 5, 6 sind in ausbringender Längsrichtung anstiegsfrei ausgebildet (keine schräg gestellten Flügelblätter). Am ersten Mischflügel 5 ist in Richtung Verschlussteil 2 in Längsrichtung ein Mischzapfen 10 angeformt. Der erste Mischflügel 5 läuft im Kammerteil 1 nicht wandgängig, d. h. er berührt nicht die Gehäusewandung 9 und bildet zwischen dieser und dem ersten Mischflügel 5 zwei Abstandvolumen 7. Das Verschlussteil 2 weist eine hintere Bodenplatte 8 auf. Das Mischelement 3 weist in ausbringender Richtung vier dritte Mischflügel 14, 15, 16, 17 auf. The mixing blades 5, 6 are designed to be free of rises in the deploying longitudinal direction (none at an angle provided wing blades). The first mixing wing 5 is in the direction of the closure part 2 in the longitudinal direction a mixing pin 10 integrally formed. The first mixing blade 5 does not run in the chamber part 1, d. H. it does not touch the housing wall 9 and forms between this and the first Mixing blades 5 two spacing volumes 7. The closure part 2 has a rear base plate 8 on. The mixing element 3 has four third mixing blades 14, 15, 16, 17 in the dispensing direction on.

In Figur 2 ist ein auszugsweiser Querschnitt bezüglich einer weiteren Variante des erfindungsgemässen Mischers dargestellt.
Bei dieser Variante sind am Verschlussteil 2 zwei im wesentlichen in Längsrichtung ausgerichtete Zapfen 12 angeordnet.FIG. 2 shows an excerpted cross section with respect to a further variant of the mixer according to the invention.
In this variant, two pins 12 which are oriented essentially in the longitudinal direction are arranged on the closure part 2.

Figur 3 zeigt einen Querschnitt eines Mischelementes.Figure 3 shows a cross section of a mixing element.

Das Mischelement 3 besteht im wesentlichen aus zwei in Längsrichtung hintereinander und radial derart versetzt angeordnete abstreifenfunktionsfreie Mischflügel 5, 6, wobei die freien Durchlässe des ersten Mischflügels 5 vom zweiten Mischflügel 6 abgedeckt werden. In ausbringender Längsrichtung weist das Mischelement 3 vier weitere dritte Mischflügel 14, 15, 16, 17 auf.The mixing element 3 consists essentially of two in the longitudinal direction and one behind the other radially offset staggered mixing blades 5, 6, the free ones Passages of the first mixing wing 5 are covered by the second mixing wing 6. In spreading In the longitudinal direction, the mixing element 3 has four further third mixing blades 14, 15, 16, 17 on.

Figur 4 zeigt eine Aufsicht eines ersten Mischflügels.FIG. 4 shows a top view of a first mixing wing.

Der erste Mischflügel 5 weist innere und äussere Ausnehmungen 18, 19 auf.The first mixing blade 5 has inner and outer recesses 18, 19.

Figur 5 zeigt eine Aufsicht eines zweiten Mischflügels.Figure 5 shows a plan view of a second mixing blade.

Der zweite Mischflügel 6 weist in Längsrichtung des Kammerteils 1 eine Materialverstärkung 21 und äussere Ausnehmungen 20 auf.The second mixing blade 6 has a material reinforcement 21 in the longitudinal direction of the chamber part 1 and outer recesses 20.

Figuren 6 und 7 zeigen einen Querschnitt bzw. eine skizzenhafte untere Aufsicht des erfindungsgemäßen Mischers. Eine Eintrittsöffnung 11 weist ein rautenförmiges, quer zur Durchflussrichtung ausgerichtetes stegförmiges Element 22 auf.Figures 6 and 7 show a cross section or a sketchy bottom view of the invention Mixer. An inlet opening 11 has a diamond-shaped, transverse to the flow direction aligned web-shaped element 22.

Claims (12)

  1. Dynamic mixer, in particular for viscous dental materials, with a chamber part (1) with a discharge opening (13) at the forward end of the chamber part (1), with a stopper part (2) arranged at the rear end of the chamber part (1) with entry openings (11) for individual components to be inserted and a central bore for a mixer element (3) which is rotatable inside the chamber part (1) about its longitudinal axis, characterized in that the mixer element (3) has at least two mixing blades (5, 6) arranged one behind the other in the longitudinal direction on its end towards the stopper part (2) which are not designed to be material-scraping with respect to the wall of the chamber part (1) and which each have axially free openings (18, 19, 20) such that the openings (18, 19, 20) of one mixing blade (5, 6) are covered in the axial direction by the solid part of the other mixing blade (6, 5), and in that an essentially longitudinally aligned inner sleeve (4) clasping the rear end of the mixer element (3) and extending nearly as far as the first mixing blade (5) is arranged on the stopper part (2).
  2. Dynamic mixer according to Claim 1, characterized in that the mixing blades (5, 6) are designed with nil rise in the longitudinal discharge direction.
  3. Dynamic mixer according to Claim 1 or Claim 2, characterized in that at least one mixing peg (10) is formed in the direction towards the stopper part (2) in the longitudinal direction on the first mixing blade (5) arranged at the rear end of the chamber part (1) so that the viscous material entering from the entry openings (11) is spread without being chopped up.
  4. Dynamic mixer according to any one of Claims 1 to 3, characterized in that at least one essentially longitudinally aligned inner peg (12) is arranged on the stopper part (2).
  5. Dynamic mixer according to any one of Claims 1 to 4, characterized in that the first mixing blade (5) is dome-shaped in the longitudinal discharge direction.
  6. Dynamic mixer according to any one of Claims 1 to 5, characterized in that first mixing blade (5) has inner and/or outer cutaways (18, 19).
  7. Dynamic mixer according to any one of Claims 1 to 6, characterized in that the second mixing blade (6) has outer cutaways (20).
  8. Dynamic mixer according to any one of Claims 1 to 7, characterized in that the second mixing blade (6) has material reinforcement (21) in the longitudinal direction of the chamber part (1).
  9. Dynamic mixer according to any one of Claims 1 to 8, characterized in that the mixer element (3) has at least one third mixing blade (14, 15, 16, 17) in the longitudinal discharge direction.
  10. Dynamic mixer according to any one of Claims 1 to 9, characterized in that at least one bridge element is arranged across the direction of flow in at least one entry opening (11).
  11. Dynamic mixer according to Claim 10, characterized in that in the direction of flow the bridge element (22) is oval, diamond-shaped, elliptical, polygonal, or circular.
  12. Use of a dynamic mixer according to any one of Claims 1 to 11 for blending viscous multi-component materials, in particular dental materials.
EP01106102A 2000-03-29 2001-03-13 Dynamic mixer Expired - Lifetime EP1149627B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK01106102T DK1149627T3 (en) 2000-03-29 2001-03-13 Dynamic mixer

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10015133 2000-03-29
DE10015133A DE10015133C1 (en) 2000-03-29 2000-03-29 Dynamic mixer for dental materials has at least two paddles in succession at the mixer on the side towards the chamber closure which do not strip the chamber walls
DE10043489 2000-09-01
DE10043489A DE10043489A1 (en) 2000-09-01 2000-09-01 Dynamic mixer used for mixing viscous multiple component materials, especially dental material has a mixing element with mixing wings arranged on the side facing the closing part

Publications (3)

Publication Number Publication Date
EP1149627A2 EP1149627A2 (en) 2001-10-31
EP1149627A3 EP1149627A3 (en) 2003-06-04
EP1149627B1 true EP1149627B1 (en) 2004-08-04

Family

ID=26005041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01106102A Expired - Lifetime EP1149627B1 (en) 2000-03-29 2001-03-13 Dynamic mixer

Country Status (7)

Country Link
EP (1) EP1149627B1 (en)
AT (1) ATE272440T1 (en)
DE (1) DE50103064D1 (en)
DK (1) DK1149627T3 (en)
ES (1) ES2223666T3 (en)
PT (1) PT1149627E (en)
TR (1) TR200401986T4 (en)

Cited By (3)

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KR101355130B1 (en) * 2013-04-25 2014-01-27 (주)디엑스엠 Impression mixing tip
US9415361B2 (en) 2004-09-22 2016-08-16 3M Innovative Properties Company Mixer for multi-component pastes, kit, and method of mixing paste components
DE102020134316A1 (en) 2020-12-18 2022-06-23 Kulzer Gmbh Rotor shaft with worm thread for a dynamic mixer for mixing low to high viscosity components

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EP1112779B1 (en) * 1998-10-14 2004-03-03 Kettenbach GmbH & CO. KG Opener for opening two tubular bags each comprising a paste
EP1072323B1 (en) 1999-07-29 2003-09-10 Wilhelm A. Keller Cartridge discharge device with actuator for dynamic mixers
EP1099470B1 (en) * 1999-11-12 2004-08-11 Kettenbach GmbH & Co. KG Device for mixing two pasty materials, especially for mixing a dental impression material with a catalyst material
US6443612B1 (en) * 1999-12-02 2002-09-03 Wilhelm A. Keller Dynamic mixer
DE59904983D1 (en) * 1999-12-23 2003-05-15 Muehlbauer Ernst Gmbh & Co Kg Dynamic mixer for dental impression materials
DE10112904C5 (en) 2001-03-15 2010-04-22 3M Espe Ag Dynamic mixer and method for mixing at least two paste components
DE10164385C1 (en) * 2001-12-28 2003-03-06 Kettenbach Gmbh & Co Kg Device for mixing two paste-like substances for dental work includes first channel extending through coupling section and having first and second parts with adjoining deflection section inbetween to ensure constant mixing ratio at outlet
WO2004080611A1 (en) * 2003-03-06 2004-09-23 Dentsply International Inc. Dispensing and mixing tip
EP1510248B1 (en) 2003-08-14 2005-06-08 3M Espe Ag Mixer element for a mixer for multi-component pastes, and mixer using the same
JP4413561B2 (en) 2003-09-01 2010-02-10 株式会社ジーシー Dental impression mixing mixer
EP1588779A1 (en) 2004-04-19 2005-10-26 3M Espe AG Dynamic mixer
EP1802385B1 (en) 2004-09-22 2008-01-23 3M Espe AG Mixer for multi-component pastes, kit, and method of mixing paste components
EP1836992A1 (en) 2006-03-10 2007-09-26 3M Innovative Properties Company Mixing device and drive for the mixing device
BRPI0817218B8 (en) * 2007-09-10 2023-03-21 Sulzer Mixpac Ag DYNAMIC MIXER
EP2680959B1 (en) 2011-02-28 2016-07-27 Sulzer Mixpac AG Dynamic mixer and use thereof
EP2618921B1 (en) 2011-08-24 2014-06-18 Kettenbach GmbH & CO. KG Mixer
DE102012004056A1 (en) * 2012-03-02 2013-09-05 Udo Tartler Device for mixing at least two fluid components, rotary driven mixer insert therefor and system of both

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DE29705741U1 (en) * 1997-04-01 1998-08-06 Muehlbauer Ernst Kg Dynamic mixer for dental impression materials

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US9415361B2 (en) 2004-09-22 2016-08-16 3M Innovative Properties Company Mixer for multi-component pastes, kit, and method of mixing paste components
KR101355130B1 (en) * 2013-04-25 2014-01-27 (주)디엑스엠 Impression mixing tip
WO2014175673A1 (en) * 2013-04-25 2014-10-30 (주)디엑스엠 Impression material mixing tip
DE102020134316A1 (en) 2020-12-18 2022-06-23 Kulzer Gmbh Rotor shaft with worm thread for a dynamic mixer for mixing low to high viscosity components
WO2022129322A1 (en) 2020-12-18 2022-06-23 Kulzer Gmbh Rotor shaft comprising a helix for a dynamic mixer for mixing low- to high-viscosity components

Also Published As

Publication number Publication date
TR200401986T4 (en) 2004-10-21
PT1149627E (en) 2004-11-30
DK1149627T3 (en) 2004-11-22
EP1149627A2 (en) 2001-10-31
ES2223666T3 (en) 2005-03-01
EP1149627A3 (en) 2003-06-04
DE50103064D1 (en) 2004-09-09
ATE272440T1 (en) 2004-08-15

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