EP1274501A1 - Mixer - Google Patents

Mixer

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Publication number
EP1274501A1
EP1274501A1 EP01923721A EP01923721A EP1274501A1 EP 1274501 A1 EP1274501 A1 EP 1274501A1 EP 01923721 A EP01923721 A EP 01923721A EP 01923721 A EP01923721 A EP 01923721A EP 1274501 A1 EP1274501 A1 EP 1274501A1
Authority
EP
European Patent Office
Prior art keywords
mixer
range
openings
mixing
cartridge front
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.)
Granted
Application number
EP01923721A
Other languages
German (de)
French (fr)
Other versions
EP1274501B2 (en
EP1274501B1 (en
Inventor
Ingo Wagner
Gerd Brandhorst
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.)
3M Deutschland GmbH
Original Assignee
3M Espe AG
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
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Application filed by 3M Espe AG filed Critical 3M Espe AG
Publication of EP1274501A1 publication Critical patent/EP1274501A1/en
Application granted granted Critical
Publication of EP1274501B1 publication Critical patent/EP1274501B1/en
Publication of EP1274501B2 publication Critical patent/EP1274501B2/en
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Links

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
    • B01F27/0724—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
    • B01F27/07—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
    • B01F27/11—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
    • 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

Definitions

  • the invention relates to a device in the form of a mixer, in particular a dynamic mixer, and / or in the form of a cartridge front, which is used in the mixing of highly viscous pastes, or a combination of both devices.
  • a two-component discharge device is described in EP 0 232 733 A or US Pat. No. 5,487,606. Such discharge devices are also referred to as static or flow mixers.
  • mixers are essentially only suitable for mixing relatively small amounts of easily miscible compositions with a viscosity that is not too high.
  • the mixer is placed on a double cartridge with two pistons. The power is transferred to the pistons manually.
  • the quality of the mixing result ultimately depends on the length of the mixing tip and the number of helices it contains. Since the volume of the mixing cannula in relation to the volume of the cartridge cannot be neglected, there is an undesirable loss of material in the mixed or mixed mass when changing the mixing cannula.
  • a method and a device for mixing at least two pasty masses is also described in DE 42 02 591 A1.
  • the device comprises two containers, the outlet connections of which are arranged in parallel next to one another for joint coupling to a mixer.
  • An essentially ideal mixer allows, on the one hand, a high material throughput with a constant mixing quality, and on the other hand, it is small in size in order to avoid material loss during mixing and to keep manufacturing costs low.
  • a typical dynamic mixer has two round inlet openings for the masses to be mixed, as well as an opening for receiving a drive shaft that drives the mixing blades.
  • the masses to be mixed are usually discharged from corresponding cartridges via electrically driven pistons.
  • the amount of miscible mass per unit of time is limited, on the one hand, by the size of the inlet openings and, on the other hand, by the force that can be transmitted to the pistons.
  • the force on the punches could be increased.
  • this measure is limited by the material properties of the device in connection with the size of the inlet openings.
  • inlet openings By designing the inlet openings differently from the circular shape, it is possible to provide larger inlet openings for the masses to be mixed, with the mixer or the cartridge front being of the same size. If the parameters mentioned, which are characteristic of the material of the mixer or of the cartridge front, are observed, it may also be unnecessary to apply additional seals, such as sealing lips and / or sealing rings.
  • the device in the form of a mixer or a cartridge front is on the one hand sufficiently elastic and flexible to act as its own seal and, on the other hand, is sufficiently stable to be able to process the forces which occur when the mass to be mixed or when mixing is applied ,
  • a material has proven to be advantageous which has a modulus of elasticity measured according to DIN 53455 of greater than 200 N / mm 2 , preferably in the range from 200 to 3600 N / mm 2 , particularly preferably in the range from 500 to 1500 N / mm 2 ,
  • the material is preferably such that it has a modulus of elasticity and an elongation at break, as described above, in combination.
  • opening in the sense of the present invention means both inlet openings and outlet openings. This depends on the direction in which the substances to be mixed flow or are pressed and on whether openings in the mixer or the cartridge front are considered.
  • a cartridge front has at least one inlet opening that corresponds to the at least one outlet opening.
  • a mixer usually has two inlet openings and only one outlet opening.
  • Oval openings and / or openings in kidney or sickle shape are advantageous, in particular openings with rounded edges and corners.
  • Such a design enables an optimized arrangement of the inlet openings around the opening for the drive shaft which is usually located in the center of a dynamic mixer. Furthermore, this design allows the utilization of almost the entire surface of a dynamic mixer available for the inlet openings.
  • the device according to the invention preferably has at least two, but possibly also three or four openings.
  • the opening deviating from the circular shape usually has an area which is larger than would be possible with a circular design.
  • These openings are usually arranged symmetrically around the opening for the drive shaft.
  • the mixing element can also be driven off-center, as described, for example, in PCT / EP00 / 09447.
  • the device according to the invention in the form of a dynamic mixer usually comprises at least three components, in particular a base plate (1) into which the non-circular inlet openings (2, 3) and the opening (4) for the drive shaft (not shown) are embedded and a rotor (5) rotatably mounted in the base plate (1), to which the mixing blades (6) are attached and a molded groove (7) for receiving the drive shaft, and the housing (8) in which the rotor (5) runs.
  • the device additionally has at least one seal in the area of the inlet openings (2, 3).
  • the shape of the groove (7) for the drive shaft is arbitrary, provided that sufficient force can be transmitted from the drive shaft to the mixing blades (6) for mixing.
  • the shaped groove (7) for the drive shaft is preferably triangular, square, square, pentagonal, hexagonal, heptagonal, octagonal or as a hollow pinion.
  • the length and / or the diameter of the mixer are usually in the range from 5 to 1000 mm, preferably in the range from 10 to 100 mm.
  • the area of the inlet openings is usually in the range from 0.1 to 5000 mm 2 , preferably in the range from 1 to 400 mm 2 .
  • This coordination is usually achieved by adapting the geometries of the openings of the cartridge front (10, 11) to the inlet openings (2, 3) of the mixer. This can be achieved by plug-in, snap-in or, if necessary, screw connections.
  • the adjustment can also be made by adapting the materials.
  • the material of the mixer has a modulus of elasticity in the range from 800 to 1400 N / mm 2 and / or an elongation at break in the range from 200 to 800% and the material of the cartridge front unites E-modulus in the range of 2000 to 3000 N / mm 2 and / or have an elongation at break in the range of 50 to 200%.
  • a comparably good sealing effect can be achieved if the material of the mixer has a modulus of elasticity in the range from 2000 to 3000 N / mm 2 and / or an elongation at break in the range of 50 to 200% and the material of the cartridge front has an modulus of elasticity in the range from 800 to 1400 N / mm 2 and / or an elongation at break in the range from 200 to 800%.
  • Suitable materials for the device in particular in the form of a mixer and / or a cartridge front with two non-circular inlet or. Outlet openings include PE, OPP, PP, PTFE, PC and / or POM.
  • the materials are preferably used in fiber-reinforced and / or filled form.
  • Suitable fibers and fillers include glass fibers / particles and carbon fibers / particles.
  • Suitable mixers and / or cartridge fronts can be produced, for example, in the injection molding process, if appropriate in a 2-component injection molding process.
  • the mixers and cartridge fronts according to the invention can be used in all fields of technology, in particular for mixing highly viscous, pasty and / or viscous compositions.
  • Examples include: adhesives, joint sealants, lacquers.
  • the mixers and cartridge fronts according to the invention can preferably be used in the dental field.
  • the devices according to the invention are particularly suitable for mixing highly viscous impression materials which, for example, are pressed out of tubular bags which are inserted into suitable cartridges using electrically driven punches.
  • the application of the materials is also conceivable and possible suitable cartridges that are directly filled with the material without the use of a tubular bag.
  • highly viscous masses includes all masses with a viscosity determined by consistency testing according to DIN 4823 class 0 to 3, which are measured with a diameter of less than 80 mm.
  • Silicones, polyethers, polyether silicones, epoxies and polyurethanes may be mentioned as examples of materials.
  • Figure 1 shows the device in the form of a dynamic mixer in longitudinal section.
  • Figure 2 shows the device in the form of a dynamic mixer in supervision.
  • FIG. 3 shows the device, comprising a mixer and a cartridge front.
  • Figure 4 shows the design in the form of a cartridge front in the supervision.
  • FIGS. 5 and 6 show further embodiments of a dynamic mixer in a top view.
  • FIG. 1 shows the device according to the invention in the form of a dynamic mixer with the three components, base plate (1), into which the non-circular inlet openings (2, 3) and the opening (4) for the drive shaft are inserted, one in the base plate (1 ) rotatably mounted rotor (5), to which the mixing blades (6) are attached, the opening having a shaped groove (7) for receiving the drive shaft, and the housing (9) in which the rotor (5) runs.
  • Figure 2 shows the device according to the invention in the form of a dynamic mixer with two kidney-shaped inlet openings of different sizes (2, 3) and a round opening (4) with a hexagonal shaped groove (7) for the drive shaft.
  • the mixing blade (6) which can be seen here in opening (2), is also indicated.
  • FIG. 3 shows the device according to the invention, comprising the mixer according to FIG. 1 in connection with two cartridge fronts (9, 9 ' ).
  • the two differently sized inlet openings (2, 3) of the dynamic mixer correspond to the two outlet openings of the cartridge front (10, 11).
  • FIG. 4 shows a top view of a cartridge with a kidney-shaped opening (10) which corresponds, for example, to the opening (3) in FIG. 2.
  • FIGS. 5 and 6 show further design options for the non-circular openings of the device according to the invention in the form of a dynamic mixer.
  • the mixer in FIG. 5 has two openings in an oval shape
  • the mixer in FIG. 6 has two openings in a semicircular shape with rounded corners.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Vehicle Body Suspensions (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Confectionery (AREA)
  • Accessories For Mixers (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

The invention relates to a device that is used for mixing pasty materials, wherein the elasticity module of the device is greater than 200 N/mm2 and/or strain at break of the material of the device ranges from 2 to 1000%, and wherein the device has at least two non-circular openings.

Description

Mischer mixer
Die Erfindung betrifft eine Vorrichtung in Form eines Mischers, insbesondere eines dynamischen Mischers, und/oder in Form einer Kartuschenfront, die beim Mischen von hochviskosen Pasten Verwendung findet bzw. eine Kombination beider Vorrichtungen.The invention relates to a device in the form of a mixer, in particular a dynamic mixer, and / or in the form of a cartridge front, which is used in the mixing of highly viscous pastes, or a combination of both devices.
In der EP 0 232 733 A oder der US 5,487,606 wird eine Zweikomponenten- Austragseinrichtung beschrieben. Solche Austrageinrichtungen werden auch als statische oder Strömungsmischer bezeichnet.A two-component discharge device is described in EP 0 232 733 A or US Pat. No. 5,487,606. Such discharge devices are also referred to as static or flow mixers.
Diese Mischer eignen sich im wesentlichen nur zum Anmischen von verhältnismäßig kleinen Mengen leicht mischbarer Massen mit nicht allzu hoher Viskosität. Der Mischer wird auf eine Doppelkartusche aufgesetzt, in der sich zwei Kolben befinden. Die Kraftübertragung auf die Kolben erfolgt händisch. Die Qualität des Mischergebnisses ist letztlich abhängig von der Länge der Mischkanüle und der Anzahl der darin enthaltenen Wendel. Da das Volumen der Mischkanüle im Verhältnis zum Volumen der Kartusche nicht zu vernachlässigen ist, kommt es beim Wechseln der Mischkanüle zu unerwünschtem Materialverlust an anzumischender bzw. angemischter Masse.These mixers are essentially only suitable for mixing relatively small amounts of easily miscible compositions with a viscosity that is not too high. The mixer is placed on a double cartridge with two pistons. The power is transferred to the pistons manually. The quality of the mixing result ultimately depends on the length of the mixing tip and the number of helices it contains. Since the volume of the mixing cannula in relation to the volume of the cartridge cannot be neglected, there is an undesirable loss of material in the mixed or mixed mass when changing the mixing cannula.
Ein Teil dieser Probleme Iässt sich durch Verwendung eines dynamischen Mischers umgehen, wie er in der WO-98/43727 beschrieben ist.Part of these problems can be avoided by using a dynamic mixer as described in WO-98/43727.
Ein Verfahren und eine Vorrichtung zum Mischen von wenigstens zwei pastösen Massen wird auch in der DE 42 02 591 A1 beschrieben. Die Vorrichtung umfasst zwei Behälter, deren Auslassstutzen zur gemeinsamen Ankoppelung an einen Mischer parallel neben einander angeordnet sind.A method and a device for mixing at least two pasty masses is also described in DE 42 02 591 A1. The device comprises two containers, the outlet connections of which are arranged in parallel next to one another for joint coupling to a mixer.
Ein im wesentlichen idealer Mischer erlaubt zum einen einen hohen Materialdurchsatz bei gleichbleibender Mischqualität, zum anderen weist er eine geringe Baugröße auf, um Materialverlust beim Anmischen zu vermeiden und die Fertigungskosten gering zu halten. Ein typischer dynamischer Mischer weist zwei runde Einlassöffnungen für die zu mischenden Massen auf, sowie eine Öffnung zur Aufnahme einer Antriebswelle, die die Mischflügel antreibt. Die zu mischenden Massen werden üblicherweise über elektrisch angetriebene Kolben aus entsprechenden Kartuschen ausgebracht.An essentially ideal mixer allows, on the one hand, a high material throughput with a constant mixing quality, and on the other hand, it is small in size in order to avoid material loss during mixing and to keep manufacturing costs low. A typical dynamic mixer has two round inlet openings for the masses to be mixed, as well as an opening for receiving a drive shaft that drives the mixing blades. The masses to be mixed are usually discharged from corresponding cartridges via electrically driven pistons.
Gewünscht ist ein hoher Durchsatz bei gleichbleibender Mischqualität.A high throughput with constant mixing quality is desired.
Die Menge an mischbarer Masse pro Zeiteinheit wird allerdings beschränkt zum einen durch die Größe der Einlassöffnungen, zum anderen durch die auf die Kolben übertragbare Kraft.The amount of miscible mass per unit of time is limited, on the one hand, by the size of the inlet openings and, on the other hand, by the force that can be transmitted to the pistons.
Die Vergrößerung des Durchmessers der runden Einlassöffnungen führt notgedrungen zu einer Vergrößerung des Mischers insgesamt und damit auch zur unerwünschten Vergrößerung des Totvolumens.The enlargement of the diameter of the round inlet openings necessarily leads to an enlargement of the mixer as a whole and thus to an undesirable increase in the dead volume.
Eine Änderung der Geometrie der Einlassöffnungen führt zu Problemen hinsichtlich der Dichtung an dieser Stelle und wird zudem durch die notwendige Öffnung für die Antriebswelle beschränkt.A change in the geometry of the inlet openings leads to problems with regard to the seal at this point and is also limited by the opening required for the drive shaft.
Alternativ könnte die Kraft auf die Stempel erhöht werden. Diese Maßnahme wird allerdings durch die Materialeigenschaften der Vorrichtung in Verbindung mit der Größe der Einlassöffnungen begrenzt.Alternatively, the force on the punches could be increased. However, this measure is limited by the material properties of the device in connection with the size of the inlet openings.
Folglich ist es eine Aufgabe der vorliegenden Erfindung, eine Vorrichtung zum Mischen bereitzustellen, die einen höheren Materialdurchsatz bei im wesentlichem gleicher Mischqualität und vorzugsweise gleichem Stempeldruck der von dem Mischgerät zur Förderung der Massen aufgebracht werden muss, ermöglicht.Accordingly, it is an object of the present invention to provide a device for mixing which enables a higher material throughput with essentially the same mixing quality and preferably the same stamp pressure which has to be applied by the mixing device for conveying the masses.
Diese Aufgabe wird durch eine Vorrichtung gelöst, wie sie in den Ansprüchen beschrieben ist.This object is achieved by a device as described in the claims.
Durch eine Gestaltung der Eintrittsöffnungen abweichend von der Kreisform ist es möglich, bei gleicher Baugröße des Mischers oder der Kartuschenfront größere Eintrittsöffnungen für die anzumischenden Massen bereitzustellen. Bei Einhaltung der genannten Parameter, die kennzeichnend für das Material des Mischers oder der Kartuschenfront sind, erübrigt sich gegebenenfalls auch die Anbringung zusätzlicher Dichtungen, wie Dichtlippen und/oder Dichtungsringe.By designing the inlet openings differently from the circular shape, it is possible to provide larger inlet openings for the masses to be mixed, with the mixer or the cartridge front being of the same size. If the parameters mentioned, which are characteristic of the material of the mixer or of the cartridge front, are observed, it may also be unnecessary to apply additional seals, such as sealing lips and / or sealing rings.
In diesem Fall ist die Vorrichtung in der Form eines Mischer bzw. einer Kartuschenfront einerseits ausreichend elastisch und flexibel, um als ihre eigene Dichtung zu wirken, zum anderen ausreichend stabil, um die beim Ausbringen der anzumischenden Masse bzw. beim Anmischen auftretenden Kräfte verarbeiten zu können.In this case, the device in the form of a mixer or a cartridge front is on the one hand sufficiently elastic and flexible to act as its own seal and, on the other hand, is sufficiently stable to be able to process the forces which occur when the mass to be mixed or when mixing is applied ,
Als vorteilhaft hat sich ein Material erwiesen, das einen E-Modul gemessen nach DIN 53455 von größer 200 N/mm2, vorzugsweise im Bereich von 200 bis 3600 N/mm2, besonders bevorzugt im Bereich von 500 bis 1500 N/mm2 aufweist.A material has proven to be advantageous which has a modulus of elasticity measured according to DIN 53455 of greater than 200 N / mm 2 , preferably in the range from 200 to 3600 N / mm 2 , particularly preferably in the range from 500 to 1500 N / mm 2 ,
Als günstig hat sich auch ein Material erwiesen, das eine Reißdehnung [%] gemessen ebenfalls nach DIN 53455 im Bereich von 2 bis 1000, vorzugsweise im Bereich von 100 bis 800 aufweist.A material which has an elongation at break [%], likewise measured in accordance with DIN 53455, in the range from 2 to 1000, preferably in the range from 100 to 800, has also proven to be advantageous.
Vorzugsweise ist das Material derart beschaffen, das es einen E-Modul und eine Reißdehnung, wie oberhalb beschrieben, in Kombination aufweist.The material is preferably such that it has a modulus of elasticity and an elongation at break, as described above, in combination.
Materialien, die mindestens eine der oben genannten Eigenschaften nicht aufweisen, haben sich als ungeeignet erwiesen für Mischer, insbesondere dynamische Mischer, und/oder Kartuschenfronten mit Öffnungen, die von der Kreisform abweichen.Materials that do not have at least one of the properties mentioned above have proven unsuitable for mixers, in particular dynamic mixers, and / or cartridge fronts with openings that deviate from the circular shape.
Unter dem Begriff Öffnung im Sinne der vorliegenden Erfindung sind sowohl Einlassöffnungen als auch Auslassöffnungen zu verstehen. Dies ist abhängig davon, in welcher Richtung die anzumischenden Substanzen fließen bzw. gepresst werden und abhängig davon, ob Öffnungen im Mischer oder der Kartuschenfront betrachtet werden.The term opening in the sense of the present invention means both inlet openings and outlet openings. This depends on the direction in which the substances to be mixed flow or are pressed and on whether openings in the mixer or the cartridge front are considered.
Üblicherweise weist eine Kartuschenfront mindestens eine Einlassöffnung auf, die mit der mindestens einen Auslassöffnung korrespondiert. Ein Mischer weist hingegen üblicherweise zwei Einlassöffnungen und nur eine Auslassöffnung auf.Typically, a cartridge front has at least one inlet opening that corresponds to the at least one outlet opening. A mixer, on the other hand, usually has two inlet openings and only one outlet opening.
Vorteilhaft sind ovale Öffnungen und/oder Öffnungen in Nieren- oder Sichelform, insbesondere Öffnungen mit abgerundeten Kanten und Ecken.Oval openings and / or openings in kidney or sickle shape are advantageous, in particular openings with rounded edges and corners.
Eine derartige Gestaltung ermöglicht eine optimierte Anordnung der Einlassöffnungen um die sich üblicherweise im Zentrum eines dynamischen Mischers befindliche Öffnung für die Antriebswelle. Ferner erlaubt diese Gestaltung die Ausnützung nahezu der gesamten für die Eintrittsöffnungen zur Verfügung stehenden Oberfläche eines dynamischen Mischers.Such a design enables an optimized arrangement of the inlet openings around the opening for the drive shaft which is usually located in the center of a dynamic mixer. Furthermore, this design allows the utilization of almost the entire surface of a dynamic mixer available for the inlet openings.
Die erfindungsgemäße Vorrichtung weist vorzugsweise mindestens zwei, gegebenenfalls aber auch drei oder vier Öffnungen auf.The device according to the invention preferably has at least two, but possibly also three or four openings.
Die von der Kreisform abweichende Öffnung hat üblicherweise eine Fläche, die größer ist, als dies bei einer kreisförmigen Ausführung möglich wäre.The opening deviating from the circular shape usually has an area which is larger than would be possible with a circular design.
Diese Öffnungen sind üblicherweise symmetrisch um die Öffnung für die Antriebswelle angeordnet.These openings are usually arranged symmetrically around the opening for the drive shaft.
Der Antrieb des Mischelements kann aber auch außermittig erfolgen, wie es beispielsweise in der PCT/EP00/09447 beschrieben ist.However, the mixing element can also be driven off-center, as described, for example, in PCT / EP00 / 09447.
Die erfindungsgemäße Vorrichtung in der Form eines dynamischen Mischers umfasst üblicherweise mindestens drei Bauteile, insbesondere eine Basisplatte (1), in die die nicht-kreisförmigen Einlassöffnungen (2, 3) und die Öffnung (4) für die Antriebswelle (nicht gezeigt) eingelassen sind und einen in der Basisplatte (1) drehbar gelagerten Rotor (5), an den die Mischflügel (6) angebracht sind und eine Formnut (7) zur Aufnahme der Antriebswelle, sowie das Gehäuse (8) in dem der Rotor (5) läuft.The device according to the invention in the form of a dynamic mixer usually comprises at least three components, in particular a base plate (1) into which the non-circular inlet openings (2, 3) and the opening (4) for the drive shaft (not shown) are embedded and a rotor (5) rotatably mounted in the base plate (1), to which the mixing blades (6) are attached and a molded groove (7) for receiving the drive shaft, and the housing (8) in which the rotor (5) runs.
Gegebenenfalls weist die Vorrichtung zusätzlich mindestens eine Dichtung im Bereich der Einlassöffnungen (2, 3) auf. Die Form der Nut (7) für die Antriebswelle ist beliebig, unter der Vorraussetzung, dass eine zum Mischen eine ausreichende Kraftübertragung von der Antriebswelle auf die Mischflügel (6) erfolgen kann.If necessary, the device additionally has at least one seal in the area of the inlet openings (2, 3). The shape of the groove (7) for the drive shaft is arbitrary, provided that sufficient force can be transmitted from the drive shaft to the mixing blades (6) for mixing.
Öffnungen in kantiger Form haben sich zur Übertragung des Drehmoments von der Antriebswelle auf den Rotor als günstig erwiesen. Vorzugsweise ist die Formnut (7) für die Antriebswelle dreieckig, viereckig, quadratisch, fünfeckig, sechseckig, siebeneckig, achteckig oder als Hohlritzel ausgebildet.Openings in angular form have proven to be favorable for the transmission of the torque from the drive shaft to the rotor. The shaped groove (7) for the drive shaft is preferably triangular, square, square, pentagonal, hexagonal, heptagonal, octagonal or as a hollow pinion.
Die Länge und/oder der Durchmesser des Mischers liegen üblicherweise im Bereich von 5 bis 1000 mm, vorzugsweise im Bereich von 10 bis 100 mm.The length and / or the diameter of the mixer are usually in the range from 5 to 1000 mm, preferably in the range from 10 to 100 mm.
Die Fläche der Einlassöffnungen liegt üblicherweise im Bereich von 0,1 bis 5000 mm2, vorzugsweise im Bereich von 1 bis 400 mm2.The area of the inlet openings is usually in the range from 0.1 to 5000 mm 2 , preferably in the range from 1 to 400 mm 2 .
Um eine homogene Durchmischung der zu mischenden Substanzen sicherzustellen, ohne die Vorrichtung oberflächlich im Außenbereich zu kontaminieren, ist es erforderlich, dass Mischer und die in den Mischer einschiebbare Kartuschenfront aufeinander abgestimmt sind.In order to ensure homogeneous mixing of the substances to be mixed without contaminating the surface of the device on the outside, it is necessary for the mixer and the cartridge front which can be pushed into the mixer to be matched to one another.
Üblicherweise wird diese Abstimmung durch Anpassung der Geometrien der Öffnungen der Kartuschenfront (10, 11) auf die Einlassöffnungen (2,3) des Mischers erreicht. Dies kann durch Steck-, Schnapp oder gegebenenfalls auch Schraubverbindungen erreicht werden.This coordination is usually achieved by adapting the geometries of the openings of the cartridge front (10, 11) to the inlet openings (2, 3) of the mixer. This can be achieved by plug-in, snap-in or, if necessary, screw connections.
Alternativ oder kumulativ kann die Abstimmung auch durch Anpassung der Materialien erfolgen.Alternatively or cumulatively, the adjustment can also be made by adapting the materials.
Es wurde gefunden, dass sich gute Dichtwirkungen insbesondere dann erzielen lassen, wenn das Material des Mischers einen E-Modul im Bereich von 800 bis 1400 N/mm2 und/oder eine Reißdehnung im Bereich von 200 bis 800% und das Material der Kartuschenfront einen E-Modul im Bereich von 2000 bis 3000 N/mm2 und/oder eine Reißdehnung im Bereich von 50 bis 200% aufweisen. Eine vergleichbar gute Dichtwirkung Iässt sich erreichen, wenn das Material des Mischers einen E-Modul im Bereich von 2000 bis 3000 N/mm2 und/oder eine Reißdehnung im Bereich von 50 bis 200% und das Material der Kartuschenfront einen E-Modul im Bereich von 800 bis 1400 N/mm2 und/oder eine Reißdehnung im Bereich von 200 bis 800% aufweisen.It has been found that good sealing effects can be achieved in particular when the material of the mixer has a modulus of elasticity in the range from 800 to 1400 N / mm 2 and / or an elongation at break in the range from 200 to 800% and the material of the cartridge front unites E-modulus in the range of 2000 to 3000 N / mm 2 and / or have an elongation at break in the range of 50 to 200%. A comparably good sealing effect can be achieved if the material of the mixer has a modulus of elasticity in the range from 2000 to 3000 N / mm 2 and / or an elongation at break in the range of 50 to 200% and the material of the cartridge front has an modulus of elasticity in the range from 800 to 1400 N / mm 2 and / or an elongation at break in the range from 200 to 800%.
Geeignete Materialien für die Vorrichtung, insbesondere in der Form eines Mischer und/oder einer Kartuschenfront mit zwei nicht-kreisförmigen Einlassbzw. Auslassöffnungen umfassen PE, OPP, PP, PTFE, PC und/oder POM. Vorzugsweise werden die Materialien in faserverstärkter und/oder gefüllter Form verwendet.Suitable materials for the device, in particular in the form of a mixer and / or a cartridge front with two non-circular inlet or. Outlet openings include PE, OPP, PP, PTFE, PC and / or POM. The materials are preferably used in fiber-reinforced and / or filled form.
Geeignete Fasern und Füllstoffe umfassen Glasfasern/ -partikel und Kohlenstofffasern/ -partikel.Suitable fibers and fillers include glass fibers / particles and carbon fibers / particles.
Geeignete Mischer und/oder Kartuschenfronten lassen sich beispielsweise im Spritzgussverfahren, gegebenenfalls in einem 2-K-Spritzgussverfahren herstellen.Suitable mixers and / or cartridge fronts can be produced, for example, in the injection molding process, if appropriate in a 2-component injection molding process.
Die erfindungsgemäßen Mischer und Kartuschenfronten lassen sich auf allen Gebieten der Technik, insbesondere zum Mischen von hochviskosen, pastösen und/oder dickflüssigen Massen einsetzen.The mixers and cartridge fronts according to the invention can be used in all fields of technology, in particular for mixing highly viscous, pasty and / or viscous compositions.
Hierunter sind allgemein Stoffe zu verstehen, die im Lagerzustand getrennt in mindestens zwei Komponenten aufbewahrt werden und vor der Verwendung gemischt werden müssen.These are generally understood to mean substances that are stored separately in at least two components when stored and must be mixed before use.
Beispielhaft seien genannt: Kleber, Fugendichtmassen, Lacke.Examples include: adhesives, joint sealants, lacquers.
Vorzugsweise lassen sich die erfindungsgemäßen Mischer und Kartuschenfronten im Dentalbereich einsetzen. Besonders eignen sich die erfindungs- gemäßen Vorrichtungen zum Mischen hochviskoser Abformmaterialien, die beispielsweise aus Schlauchbeuteln, die in geeignete Kartuschen eingeschoben sind, mit elektrisch angetriebenen Stempeln ausgepresst werden. Denkbar und möglich ist auch die Ausbringung der Materialien aus geeigneten Kartuschen, die direkt mit dem Material befüllt sind ohne dass ein Schlauchbeutel verwendet wird.The mixers and cartridge fronts according to the invention can preferably be used in the dental field. The devices according to the invention are particularly suitable for mixing highly viscous impression materials which, for example, are pressed out of tubular bags which are inserted into suitable cartridges using electrically driven punches. The application of the materials is also conceivable and possible suitable cartridges that are directly filled with the material without the use of a tubular bag.
Der Begriff hochviskose Massen umfasst alle Massen mit einer Viskosität bestimmt durch Konsistenzprüfung nach DIN 4823 Klasse 0 bis 3, die mit einem Durchmesser von kleiner 80 mm gemessen werden.The term highly viscous masses includes all masses with a viscosity determined by consistency testing according to DIN 4823 class 0 to 3, which are measured with a diameter of less than 80 mm.
Als Materialien seien beispielhaft genannt Silikone, Polyether, Polyethersilikone, Epoxide und Polyurethane.Silicones, polyethers, polyether silicones, epoxies and polyurethanes may be mentioned as examples of materials.
Bevorzugte Ausführungsbeispiele werden nachstehend anhand der Zeichnungen erläutert.Preferred exemplary embodiments are explained below with reference to the drawings.
Figur 1 zeigt die Vorrichtung in der Form eines dynamischen Mischers im Längsschnitt.Figure 1 shows the device in the form of a dynamic mixer in longitudinal section.
Figur 2 zeigt die Vorrichtung in Form eines dynamischen Mischers in der Aufsicht.Figure 2 shows the device in the form of a dynamic mixer in supervision.
Figur 3 zeigt die Vorrichtung, umfassend einen Mischer und eine Kartuschenfront.FIG. 3 shows the device, comprising a mixer and a cartridge front.
Figur 4 zeigt die Ausführung in Form einer Kartuschenfront in der Aufsicht.Figure 4 shows the design in the form of a cartridge front in the supervision.
Figur 5 und 6 zeigen weitere Ausführungsformen eines dynamischen Mischers in der Aufsicht.FIGS. 5 and 6 show further embodiments of a dynamic mixer in a top view.
Figur 1 zeigt die erfindungsgemäße Vorrichtung in der Form eines dynamischen Mischers mit den drei Bauteilen, Basisplatte (1 ), in die die nichtkreisförmigen Einlassöffnungen (2,3) und die Öffnung (4) für die Antriebswelle eingelassen sind, einen in der Basisplatte (1) drehbar gelagerten Rotor (5), an den die Mischflügel (6) angebracht sind, wobei die Öffnung eine Formnut (7) zur Aufnahme der Antriebswelle aufweist, sowie das Gehäuse (9) in dem der Rotor (5) läuft. Figur 2 zeigt die erfindungsgemäße Vorrichtung in der Form eines dynamischen Mischers mit zwei nierenförmigen Einlassöffnungen unterschiedlicher Größe (2, 3) und einer runden Öffnung (4) mit sechseckiger Formnut (7) für die Antriebswelle. Angedeutet ist auch der hier in Öffnung (2) zu sehende Mischflügel (6).FIG. 1 shows the device according to the invention in the form of a dynamic mixer with the three components, base plate (1), into which the non-circular inlet openings (2, 3) and the opening (4) for the drive shaft are inserted, one in the base plate (1 ) rotatably mounted rotor (5), to which the mixing blades (6) are attached, the opening having a shaped groove (7) for receiving the drive shaft, and the housing (9) in which the rotor (5) runs. Figure 2 shows the device according to the invention in the form of a dynamic mixer with two kidney-shaped inlet openings of different sizes (2, 3) and a round opening (4) with a hexagonal shaped groove (7) for the drive shaft. The mixing blade (6), which can be seen here in opening (2), is also indicated.
Figur 3 zeigt die erfindungsgemäße Vorrichtung, umfassend den Mischer gemäß Figur 1 in Verbindung mit zwei Kartuschenfronten (9, 9'). Die beiden unterschiedlich großen Einlassöffnungen (2, 3) des dynamischen Mischers korrespondieren mit den beiden Auslassöffnungen der Kartuschenfront (10, 11).FIG. 3 shows the device according to the invention, comprising the mixer according to FIG. 1 in connection with two cartridge fronts (9, 9 ' ). The two differently sized inlet openings (2, 3) of the dynamic mixer correspond to the two outlet openings of the cartridge front (10, 11).
Figur 4 zeigt eine Kartuschenfront in Aufsicht mit einer nierenförmigen Öffnung (10), die beispielsweise mit der Öffnung (3) in Figur 2 korrespondiert.FIG. 4 shows a top view of a cartridge with a kidney-shaped opening (10) which corresponds, for example, to the opening (3) in FIG. 2.
In den Figuren 5 und 6 sind weitere Gestaltungsmöglichkeiten für die nicht- kreisförmigen Öffnungen der erfindungsgemäßen Vorrichtung in Form eines dynamischen Mischers zu sehen.FIGS. 5 and 6 show further design options for the non-circular openings of the device according to the invention in the form of a dynamic mixer.
Der Mischer in Figur 5 weist zwei Öffnungen in ovaler Form auf, der Mischer in Figur 6 zwei Öffnungen in Halbkreisform mit abgerundeten Ecken. The mixer in FIG. 5 has two openings in an oval shape, the mixer in FIG. 6 has two openings in a semicircular shape with rounded corners.
BezuqszeichenlisteLIST OF REFERENCES
Basisplatte (1)Base plate (1)
Einlassöffnungen (2, 3)Inlet openings (2, 3)
Öffnung für Antriebswelle (4) Rotor (5)Opening for drive shaft (4) rotor (5)
Mischflügel (6)Mixing blades (6)
Formnut (7)Shaped groove (7)
Gehäuse (8)Housing (8)
Kartuschenfront (9, Öffnungen der Kartuschenfront (10, 1) Cartridge front (9, openings of the cartridge front (10, 1)

Claims

Patentansprücheclaims
Vorrichtung in Form eines dynamischen Mischers oder einer Kartuschenfront, der/die beim Mischen von pastösen Massen Verwendung findet, mit mindestens zwei Öffnungen, von denen mindestens eine nicht-kreisförmig ist, wobei die Vorrichtung in Form eines Mischers zur Verbindung mit mindestens einer Vorrichtung in Form einer Kartuschenfront ausgebildet ist, die über korrespondierende Öffnungen verfügt, und wobei entweder der Elastizitätsmodul des Materials der Vorrichtung in Form eines Mischers einen E-Modul im Bereich von 800 bis 1400Device in the form of a dynamic mixer or a cartridge front, which is used in the mixing of pasty masses, with at least two openings, at least one of which is non-circular, the device in the form of a mixer for connection to at least one device in the form a cartridge front is formed, which has corresponding openings, and either the elastic modulus of the material of the device in the form of a mixer has an elastic modulus in the range from 800 to 1400
N/mm2 und/oder eine Reißdehnung im Bereich von 200 bis 800% aufweisen, und die Reißdehnung des Materials der Vorrichtung in Form einer Kartuschenfront im Bereich von 50 bis 200 % liegt und/oder der E- Modul im Bereich von 2000 bis 3000 N/mm2 liegen, oder der Elastizitätsmodul des Materials der Vorrichtung in Form einerN / mm 2 and / or have an elongation at break in the range from 200 to 800%, and the elongation at break of the material of the device in the form of a cartridge front is in the range from 50 to 200% and / or the modulus of elasticity is in the range from 2000 to 3000 N / mm2, or the elastic modulus of the material of the device in the form of a
Kartuschenfront einen E-Modul im Bereich von 800 bis 1400 N/mm2 und/oder eine Reißdehnung im Bereich von 200 bis 800% aufweisen, und die Reißdehnung des Materials der Vorrichtung in Form eines Mischers im Bereich von 50 bis 200 % liegt und/oder der E-Modul im Bereich von 2000 bis 3000 N/mm2 liegen. Vorrichtung nach Anspruch 1 in Form eines Mischers mit zwei, drei oder vier nicht-kreisförmigen Öffnungen.Cartridge front have a modulus of elasticity in the range from 800 to 1400 N / mm 2 and / or an elongation at break in the range from 200 to 800%, and the elongation at break of the material of the device in the form of a mixer is in the range from 50 to 200% and / or the modulus of elasticity is in the range from 2000 to 3000 N / mm 2 . Device according to claim 1 in the form of a mixer with two, three or four non-circular openings.
Vorrichtung nach einem der vorstehenden Ansprüche, wobei die mindestens eine nicht-kreisförmige Öffnung nierenförmig, oval oder sichelförmig ist.Device according to one of the preceding claims, wherein the at least one non-circular opening is kidney-shaped, oval or sickle-shaped.
Vorrichtung nach einem der vorstehenden Ansprüche in Form eines dynamischen Mischers, wobei sich in der Öffnung für die Antriebswelle eine Formnut befindet, die dreieckig, viereckig, fünfeckig, sechseckig, siebeneckig achteckig, sternförmig oder als Hohlritzel ausgebildet ist.Device according to one of the preceding claims in the form of a dynamic mixer, wherein in the opening for the drive shaft there is a shaped groove which is triangular, square, pentagonal, hexagonal, octagonal octagonal, star-shaped or as a hollow pinion.
Verfahren zur Herstellung einer Vorrichtung nach einem der vorstehenden Ansprüche durch Spritzgießen. Verwendung einer Vorrichtung nach einem der vorstehenden Ansprüche zum Mischen von hochviskosen, pastösen und/oder dickflüssigen Massen.Method for producing a device according to one of the preceding claims by injection molding. Use of a device according to one of the preceding claims for mixing highly viscous, pasty and / or viscous masses.
Verwendung eines Materials mit einem Elastitzitätsmodul im Bereich von größer als 200 N/mm2 und/oder einer Reißdehnung im Bereich von 2 bisUse of a material with a modulus of elasticity in the range of greater than 200 N / mm 2 and / or an elongation at break in the range of 2 to
1000% zur Herstellung einer Vorrichtung in Form eines dynamischen Mischers oder einer Kartuschenfront, mit mindestens zwei Öffnungen, von denen eine nicht-kreisförmig ist, wobei die Vorrichtung in Form eines Mischers zur Verbindung mit mindestens einer Vorrichtung in Form einer Kartuschenfront ausgebildet ist, die über korrespondierende Öffnungen verfügt. 1000% for the manufacture of a device in the form of a dynamic mixer or a cartridge front, with at least two openings, one of which is non-circular, the device being designed in the form of a mixer for connection to at least one device in the form of a cartridge front, which corresponding openings.
EP01923721A 2000-04-20 2001-04-11 Mixer Expired - Lifetime EP1274501B2 (en)

Applications Claiming Priority (3)

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DE10019893A DE10019893C2 (en) 2000-04-20 2000-04-20 Device in the form of a dynamic mixer or a cartridge front and their use
DE10019893 2000-04-20
PCT/EP2001/004141 WO2001080986A1 (en) 2000-04-20 2001-04-11 Mixer

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EP1274501A1 true EP1274501A1 (en) 2003-01-15
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US20030137898A1 (en) 2003-07-24
EP1274501B2 (en) 2008-01-23
DE10019893C2 (en) 2003-05-28
JP2003531000A (en) 2003-10-21
WO2001080986A1 (en) 2001-11-01
DE10019893A1 (en) 2001-10-31
DE50102677D1 (en) 2004-07-29
EP1274501B1 (en) 2004-06-23
AU2001250422A1 (en) 2001-11-07
ATE269754T1 (en) 2004-07-15

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