EP0492413B1 - Device for mixing and applying masses composed of several components - Google Patents

Device for mixing and applying masses composed of several components Download PDF

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Publication number
EP0492413B1
EP0492413B1 EP91121735A EP91121735A EP0492413B1 EP 0492413 B1 EP0492413 B1 EP 0492413B1 EP 91121735 A EP91121735 A EP 91121735A EP 91121735 A EP91121735 A EP 91121735A EP 0492413 B1 EP0492413 B1 EP 0492413B1
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EP
European Patent Office
Prior art keywords
pistons
cartridges
shaft
piston
clutch
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
EP91121735A
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German (de)
French (fr)
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EP0492413A1 (en
Inventor
Wolf Dietrich Dr. Herold
Gerd Brandhorst
Günter Rehfeld
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Thera Patent GmbH and Co KG Gesellschaft fuer Industrielle Schutzrechte
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Thera Patent GmbH and Co KG Gesellschaft fuer Industrielle Schutzrechte
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00503—Details of the outlet element
    • B05C17/00516—Shape or geometry of the outlet orifice or the outlet element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00553—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00553—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components
    • B05C17/00566—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components with a dynamic mixer in the nozzle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like
    • B05C17/0103—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like with electrically actuated piston or the like

Definitions

  • a device for mixing and dispensing multicomponent compositions having the features specified in the first part of claim 1 is known from DE-A-3 723 517.
  • the pistons used to squeeze the cartridges are driven by a motor which simultaneously rotates a shaft for driving the mixer element.
  • the cartridges contain the components to be mixed, for example an adhesive, which react chemically with one another and harden within a short time.
  • the pistons are pulled out of them by reversing the rotation of the motor, whereupon the cartridges can be removed and replaced with new ones.
  • the known device provides a rapid traverse for the retraction movement, the replacement of the cartridges is relatively time-consuming.
  • the pistons are advanced in the cartridges via piston rods designed as threaded spindles, each of which is driven by a gear carrier. If a cartridge has been emptied, one end of the piston rod is at the foremost end of the cartridge, while the other end only protrudes a little from the rear end of the gear carrier. After inserting a new full cartridge, the gear carrier is turned over and placed so that the short end of the piston rod now acts on the piston in the cartridge. This avoids time-consuming screwing back of the piston rods.
  • the invention has for its object to provide a device of the type mentioned, which allows a quick, effortless and easy replacement of the cartridges - even in the partially filled state.
  • the solution to this problem according to the invention is characterized in claim 1.
  • the motorized (and always relatively slow) drive is then disengaged when the cartridge is changed, so that the pistons can be manually moved forward and backward at a much higher speed. After inserting the new cartridges, the pistons will be manually retracted until they noticeably hit the contents of the cartridge, so that in the subsequent motor Feeding empty movements can be avoided.
  • the embodiment of the invention according to claim 2 is advantageous in that the clutch is engaged and disengaged simultaneously with the piston drive, so that a manual piston drive is only possible when the motor drive is switched off.
  • Another very important advantage of the simultaneous shutdown of the engine and clutch is that the pistons are relieved at the end of each application process, thereby preventing the components from flowing undesirably.
  • the shaft driving the mixer element can also be uncoupled from it by axial displacement. This makes it possible to remove the cartridges together with the mixing head as a unit by means of a movement transverse to the direction of advance of the pistons.
  • the design according to claim 4 has the further advantage that when the pistons are manually guided out of the cartridges, the shaft is automatically decoupled from the mixing head without requiring additional manipulations. After inserting the new set of cartridges, the spring provided according to claim 6 ensures that the shaft is automatically coupled again to the mixing head when the pistons are inserted into the cartridges. Claim 6 specifies a structurally simple measure for driving the shaft through the pistons.
  • a handwheel is advantageously used for manual displacement of the pistons, which is fastened directly to the output shaft of the clutch driving the pistons and therefore permits direct actuation of the pistons.
  • the pistons are connected to one another and can be moved back and forth together.
  • each piston is loosely coupled to the piston rod driving it, so that it can center itself within the cartridge, even if the piston rod gets out of alignment with the cartridge axis.
  • Such a lack of alignment can be particularly with highly viscous masses and common drive of the pistons occur.
  • the measures of claims 10 and 11 serve to ensure an effortless insertion of the pistons into the rear cartridge ends despite their loose coupling to the piston rods.
  • the device comprises a housing, generally designated 10, a bowl-shaped receptacle 11 for two cartridges 12, 13 lying parallel to one another, at the front end of which a mixing head 14 is attached, pistons 15, 16 which are displaceable in the cartridges 12, 13, one Electric motor 17 for the piston drive, a shaft 18 running parallel to the cartridges 12, 13 and between them, which engages at its front end with a mixer element 19 rotatably mounted in the mixing head 14, and an electric motor 20 for driving the shaft 18.
  • the cartridges 12, 13 are shown with different diameters, which corresponds to the case that the components are fed to the mixing head 14 in a ratio different from 1: 1 at the same feed speed of the pistons 15, 16.
  • the two pistons 15 and 16 are connected via joints 23, 24 to cross-sectionally or angularly shaped piston rods 25 and 26, which are rigidly connected to one another at their rear end by means of a cross member 27.
  • the joints 23, 24 form such a loose coupling that the pistons 15, 16 are pivotable relative to their piston rods 25, 26 and are slightly displaceable laterally. This ensures that the pistons 15, 16 can center themselves within the cartridges 12, 13 and do not tilt and block when the piston rods 25, 26 are out of alignment when being advanced or retracted should come with the cartridge axes. This ensures smooth movement of the piston.
  • the piston is driven by the motor 17 via a reduction gear 28 onto the drive disk 29 of a magnetic coupling 30, the driven disk 31 of which is wedged onto an intermediate shaft 32.
  • the intermediate shaft 32 carries a handwheel 33 which is accessible on the outside of the housing 10.
  • the intermediate shaft 32 drives two chains 34, to which the crossbar 27 connecting the piston rods 25, 26 is fastened.
  • the shaft 18 is driven by the motor 20 via a gear 35, a pinion 36 seated on its output shaft and a pinion 37 meshing with it and fastened on the shaft 18.
  • the shaft 18 is mounted so as to be displaceable in the axial direction and is biased in the direction of engagement with the mixer element 19 (to the right in FIGS. 1 and 3) by a compression spring 38 which is arranged between the pinion 37 and a rear bearing bracket 39.
  • the intermeshing teeth of the pinions 36 and 37 are of sufficient axial length to remain in engagement when the shaft 18 according to FIGS. 1 and 3 is displaced to the left so far that its hexagon 40 provided at the front end is disengaged is withdrawn with the mixer element 19.
  • the pistons 15, 16 are located inside the guide cylinders 41 and 42, which have a cylindrical inner guide surface and open in the direction of the cartridges 12, 13 with an expanding conical surface.
  • the guide cylinders 41, 42 take over Guiding the pistons 15, 16 which are loosely coupled to the piston rods 25, 26, if these are located outside the cartridges 12, 13, and bring about an aligned insertion of the pistons into the cartridges.
  • the conical surfaces facilitate the insertion of the pistons 15, 16 into the guide cylinders 41, 42 in the event that these have been pushed forward when cartridges 12, 13 are missing.
  • the components of the mass to be produced can be filled directly into the cartridges 12, 13, in which case the pistons 15, 16 work on a feed element which closes the cartridges to the rear.
  • the components can be contained in foil bags which are inserted into the cartridges 12, 13 and are pressed out using the pistons 15, 16.
  • a cartridge 12, 13 with a mixing head 14 attached to it is first inserted into the receptacle 11 of the device, and the pistons 15, 16 are advanced with the magnetic clutch 30 disengaged by means of the handwheel 33 so far that they are on the rest of the filling (the feed elements or foil bags mentioned above). Then the two electric motors 17 and 20 are switched on simultaneously with a switch (not shown) and the magnetic clutch 30 is engaged.
  • the pistons 15, 16 are slowly advanced within the cartridges 12, 13, whereby the two components are pressed into the mixing head 14.
  • the mixer element 19 rotates and mixes the components to form a ready-to-use mass which is pressed out at the discharge opening 22 of the mixing head 14. After dispensing a desired amount, the device is switched off.
  • the pistons 15, 16 are then in an intermediate position inside the cartridges 12, 13.
  • the pistons 15, 16 can be guided out of the cartridges 12, 13 to the rear by turning the handwheel 33.
  • the pistons 15, 16 take the pinion 37 against the bias of the compression spring 38 to the left in FIG. 1, as a result of which the hexagon 40 provided at the front end of the shaft 18 disengages from the mixer element 19.
  • the unit consisting of the cartridges 12, 13 and the mixing head 14 can be removed from the device in a direction perpendicular to the direction of advance of the pistons 15, 16, namely upwards in FIG. 2, and replaced by another set of cartridges with a mixing head.

Abstract

A device for mixing and applying two-component materials, has two pistons 15, 16 which can be displaced in cartridges 12, 13 and which can be driven forwards together by an electric motor via a magnetic coupling 30, but which can be drawn back manually and inserted again via a manual wheel 33 when the motor is switched off and the magnetic coupling 30 moved out. At the end of the manual return movement, the pistons 15, 16 drive a shaft 18 which drives a mixing head 14 in rotation and which, simultaneously with the emergence of the pistons 15, 16 from the cartridges 12, 13, disengages with the mixing head 14. In this way, it is possible to remove the cartridges 12 and 13, together with the mixing head 14 connected thereto, out of the device as a unit and to replace them by another unit in order to change the spent cartridges or when the cartridges are still partially full to use the device in the interim to produce a different product. Despite the motor drive which is designed for a slow advance of the pistons 15, 16, such changing of the cartridges is quick and easy due to the manual extension and retraction of the pistons. <IMAGE>

Description

Ein Gerät zum Mischen und Ausbringen von Mehrkomponenten-Massen mit den im ersten Teil des Anspruchs 1 angegebenen Merkmalen ist aus DE-A-3 723 517 bekannt. Dort werden die zum Auspressen der Kartuschen dienenden Kolben von einem Motor angetrieben, der gleichzeitig eine Welle zum Antrieb des Mischerelements dreht.A device for mixing and dispensing multicomponent compositions having the features specified in the first part of claim 1 is known from DE-A-3 723 517. There, the pistons used to squeeze the cartridges are driven by a motor which simultaneously rotates a shaft for driving the mixer element.

Bei dem bekannten Gerät enthalten die Kartuschen die miteinander zu mischenden Komponenten, beispielsweise eines Klebstoffs, die chemisch miteinander reagieren und innerhalb kurzer Zeit aushärten. Nach Entleeren der Kartuschen werden die Kolben durch entgegengesetzte Drehung des Motors aus ihnen nach hinten herausgezogen, woraufhin die Kartuschen entnommen und durch neue ersetzt werden können. Obwohl die bekannte Vorrichtung für die Rückziehbewegung einen Eilgang vorsieht, gestaltet sich der Austausch der Kartuschen verhältnismäßig zeitraubend.In the known device, the cartridges contain the components to be mixed, for example an adhesive, which react chemically with one another and harden within a short time. After the cartridges have been emptied, the pistons are pulled out of them by reversing the rotation of the motor, whereupon the cartridges can be removed and replaced with new ones. Although the known device provides a rapid traverse for the retraction movement, the replacement of the cartridges is relatively time-consuming.

Will man die Kartuschen im teilgefüllten Zustand auswechseln, um die gleiche Vorrichtung zum Mischen und Ausbringen eines anderen Materials zu verwenden, so ergibt sich wiederum die Notwendigkeit, die Kolben durch Umsteuern des Motors zurückzuziehen, wobei nun nach Einsetzen der anderen, möglicherweise ebenfalls nur noch teilgefüllten Kartuschen der langsame Vorwärtsgang eingeschaltet werden muß, so daß entsprechend viel Zeit vergeht, bis die Kolben zur Anlage kommen. Ferner läßt sich wegen des erheblichen Leervorschubs die erste Teilmenge des neuen Materials in der Praxis nur schwer dosieren.If you want to replace the cartridges in the partially filled state in order to use the same device for mixing and dispensing a different material, there is again the need to pull the pistons back by reversing the engine, now after inserting the other, possibly also only partially filled Cartridges the slow forward gear must be switched on so that a corresponding amount of time passes until the pistons come into contact. Furthermore, the first subset of the new material is difficult to dose in practice because of the considerable empty feed.

Aus EP-B-0 057 465 ist ein Gerät zum Mischen und Ausbringen von zwei Komponenten-Massen bekannt, bei denen der Mischkopf lösbar ist, so daß aus den gleichen Kartuschen mehrere Ausbringvorgänge mit zwischenzeitlichen längeren Unterbrechungen möglich sind. Vor jedem erneuten Ausbringen wird dabei der Mischkopf mit dem inzwischen ausgehärteten Gemisch abgenommen und durch einen neuen Mischkopf ersetzt.From EP-B-0 057 465 a device for mixing and dispensing two component masses is known in which the mixing head is detachable, so that several can be made from the same cartridges Spreading operations with longer interruptions in the meantime are possible. Before each new application, the mixing head with the now hardened mixture is removed and replaced with a new mixing head.

Bei diesem Gerät werde die Kolben in den Kartuschen über als Gewindespindeln ausgebildete Kolbenstangen vorgeschoben, die jeweils über einen Zahnradträger angetrieben werden. Ist eine Kartusche entleert worden, so befindet sich das eine Ende der Kolbenstange am vordersten Ende der Kartusche, während ihr anderes Ende nur noch wenig am hinteren Ende des Zahnradträgers herausragt. Nach Einsetzen einer neuen vollen Kartusche wird der Zahnradträger umgedreht und so aufgesetzt, daß nun das kurze Ende der Kolbenstange auf den in der Kartusche befindlichen Kolben wirkt. Dadurch wird ein zeitraubendes Zurückschrauben der Kolbenstangen vermieden.In this device, the pistons are advanced in the cartridges via piston rods designed as threaded spindles, each of which is driven by a gear carrier. If a cartridge has been emptied, one end of the piston rod is at the foremost end of the cartridge, while the other end only protrudes a little from the rear end of the gear carrier. After inserting a new full cartridge, the gear carrier is turned over and placed so that the short end of the piston rod now acts on the piston in the cartridge. This avoids time-consuming screwing back of the piston rods.

Auch hier besteht die Schwierigkeit, daß beim Auswechseln teilgefüllter Kartuschen die Kolbenstangen durch Umsteuern des Antriebs oder auch manuell derart gegenüber den Zahnradträgern verdreht werden müssen, um sie in Anlage mit den in den neuen Kartuschen befindlichen Kolben zu bringen. Wird diese Stellung nicht genau erreicht, so ergibt sich bei erneuter Inbetriebnahme zunächst ein Leervorschub mit der Folge, daß eine etwa vorgegebene Relation zwischen Beaufschlagungszeit und ausgebrachter Gemischmenge nicht eingehalten wird.Here too there is the difficulty that when replacing partially filled cartridges, the piston rods have to be rotated relative to the gear carriers by reversing the drive or manually in order to bring them into contact with the pistons in the new cartridges. If this position is not exactly reached, an empty feed initially results when starting up again, with the result that a predetermined relationship between the exposure time and the quantity of mixture applied is not maintained.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs bezeichneten Art anzugeben, die ein rasches, mühe- und problemloses Auswechseln der Kartuschen - auch im teilgefüllten Zustand - gestattet.The invention has for its object to provide a device of the type mentioned, which allows a quick, effortless and easy replacement of the cartridges - even in the partially filled state.

Die erfindungsgemäße Lösung dieser Aufgabe ist im Anspruch 1 gekennzeichnet. Danach wird beim Kartuschenwechsel der motorische (und immer verhältnismäßig langsame) Antrieb ausgekuppelt, so daß die Kolben sich unmittelbar und mit wesentlich höherer Geschwindigkeit manuell vor- und zurückführen lassen. Nach dem Einsetzen der neuen Kartuschen werden die Kolben dabei manuell so weit eingefahren werden, bis sie spürbar auf den Kartuscheninhalt treffen, so daß beim nachfolgenden motorischen Vorschub Leerbewegungen vermieden werden.The solution to this problem according to the invention is characterized in claim 1. The motorized (and always relatively slow) drive is then disengaged when the cartridge is changed, so that the pistons can be manually moved forward and backward at a much higher speed. After inserting the new cartridges, the pistons will be manually retracted until they noticeably hit the contents of the cartridge, so that in the subsequent motor Feeding empty movements can be avoided.

Die Ausgestaltung der Erfindung nach Anspruch 2 ist insofern von Vorteil, als die Kupplung gleichzeitig mit dem Kolbenantrieb ein- und ausgerückt wird, so daß ein manueller Kolbenantrieb dann und nur dann möglich ist, wenn der motorische Antrieb ausgeschaltet ist. Ein weiterer, sehr wesentlicher Vorteil der gleichzeitigen Abschaltung von Motor und Kupplung besteht darin, daß die Kolben am Ende jedes Ausbringvorgangs entlastet werden und dadurch ein unerwünschtes Nachfließen der Komponenten vermieden wird.The embodiment of the invention according to claim 2 is advantageous in that the clutch is engaged and disengaged simultaneously with the piston drive, so that a manual piston drive is only possible when the motor drive is switched off. Another very important advantage of the simultaneous shutdown of the engine and clutch is that the pistons are relieved at the end of each application process, thereby preventing the components from flowing undesirably.

In der Weiterbildung der Erfindung nach Anspruch 3 läßt sich auch die das Mischerelement antreibende Welle durch Axialverschiebung von diesem entkuppeln. Dadurch wird es möglich, die Kartuschen samt Mischkopf als Einheit durch eine quer zur Vorschubrichtung der Kolben erfolgende Bewegung zu entnehmen.In the development of the invention according to claim 3, the shaft driving the mixer element can also be uncoupled from it by axial displacement. This makes it possible to remove the cartridges together with the mixing head as a unit by means of a movement transverse to the direction of advance of the pistons.

Die Gestaltung nach Anspruch 4 bringt den weiteren Vorteil mit sich, daß beim manuellen Herausführen der Kolben aus den Kartuschen automatisch auch die Welle vom Mischkopf entkoppelt wird, ohne zusätzliche Handgriffe zu erfordern. Nach dem Einsetzen des neuen Kartuschensatzes sorgt dabei die gemäß Anspruch 6 vorgesehene Feder dafür, daß beim Einführen der Kolben in die Kartuschen die Welle automatisch wieder an den Mischkopf angekoppelt wird. Anspruch 6 gibt eine konstruktiv einfache Maßnahme für die Mitnahme der Welle durch die Kolben an.The design according to claim 4 has the further advantage that when the pistons are manually guided out of the cartridges, the shaft is automatically decoupled from the mixing head without requiring additional manipulations. After inserting the new set of cartridges, the spring provided according to claim 6 ensures that the shaft is automatically coupled again to the mixing head when the pistons are inserted into the cartridges. Claim 6 specifies a structurally simple measure for driving the shaft through the pistons.

Gemäß Anspruch 7 dient zum manuellen Verschieben der Kolben vorteilhafterweise ein Handrad, das unmittelbar auf der die Kolben treibenden Abtriebswelle der Kupplung befestigt ist und daher eine unmittelbare Betätigung der Kolben gestattet. Gemäß Anspruch 8 sind dabei die Kolben miteinander verbunden und gemeinsam vor- und zurückbewegbar.According to claim 7, a handwheel is advantageously used for manual displacement of the pistons, which is fastened directly to the output shaft of the clutch driving the pistons and therefore permits direct actuation of the pistons. According to claim 8, the pistons are connected to one another and can be moved back and forth together.

In der weiteren vorteilhaften Ausgestaltung der Erfindung nach Anspruch 9 ist jeder Kolben an die ihn antreibende Kolbenstange lose angekoppelt, so daß er sich innerhalb der Kartusche selbsttätig zentrieren kann, auch wenn die Kolbenstange außer Fluchtung mit der Kartuschenachse gerät. Eine derartige mangelnde Fluchtung kann insbesondere bei hochviskosen Massen und gemeinsamen Antrieb der Kolben auftreten. Die Maßnahmen der Ansprüche 10 und 11 dienen dazu, ein müheloses Einführen der Kolben in die hinteren Kartuschenenden trotz ihrer losen Ankopplung an die Kolbenstangen zu gewährleisten.In the further advantageous embodiment of the invention according to claim 9, each piston is loosely coupled to the piston rod driving it, so that it can center itself within the cartridge, even if the piston rod gets out of alignment with the cartridge axis. Such a lack of alignment can be particularly with highly viscous masses and common drive of the pistons occur. The measures of claims 10 and 11 serve to ensure an effortless insertion of the pistons into the rear cartridge ends despite their loose coupling to the piston rods.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnungen näher erläutert. Darin zeigen

Figur 1
einen horizontalen Längsschnitt durch ein Misch- und Ausbringgerät längs der Linie I-I der Figur 3,
Figur 2
einen Querschnitt längs der Linie II-II der Figur 3, und
Figur 3
einen vertikalen Längsschnitt längs der Linie III-III nach Figur 2.
An embodiment of the invention is explained below with reference to the drawings. Show in it
Figure 1
3 shows a horizontal longitudinal section through a mixing and spreading device along the line II in FIG. 3,
Figure 2
a cross-section along the line II-II of Figure 3, and
Figure 3
a vertical longitudinal section along the line III-III of Figure 2.

Gemäß den Zeichnungen umfaßt das Gerät ein generell mit 10 bezeichnetes Gehäuse, eine schalenförmige Aufnahme 11 für zwei parallel zueinander liegende Kartuschen 12, 13, an deren vorderem Ende ein Mischkopf 14 befestigt ist, in den Kartuschen 12, 13 verschiebbare Kolben 15, 16, einen Elektromotor 17 für den Kolbenantrieb, eine parallel zu den Kartuschen 12, 13 und zwischen diesen verlaufende Welle 18, die an ihrem vorderen Ende mit einem in dem Mischkopf 14 drehbar gelagerten Mischerelement 19 in Eingriff steht, und einen Elektromotor 20 zum Antrieb der Welle 18. Die Kartuschen 12, 13 sind mit unterschiedlichen Durchmessern dargestellt, was dem Fall entspricht, daß bei gleicher Vorschubgeschwindigkeit der Kolben 15, 16 die Komponenten in einem von 1:1 verschiedenen Verhältnis dem Mischkopf 14 zugeführt werden.According to the drawings, the device comprises a housing, generally designated 10, a bowl-shaped receptacle 11 for two cartridges 12, 13 lying parallel to one another, at the front end of which a mixing head 14 is attached, pistons 15, 16 which are displaceable in the cartridges 12, 13, one Electric motor 17 for the piston drive, a shaft 18 running parallel to the cartridges 12, 13 and between them, which engages at its front end with a mixer element 19 rotatably mounted in the mixing head 14, and an electric motor 20 for driving the shaft 18. The cartridges 12, 13 are shown with different diameters, which corresponds to the case that the components are fed to the mixing head 14 in a ratio different from 1: 1 at the same feed speed of the pistons 15, 16.

Die beiden Kolben 15 und 16 sind über Gelenke 23, 24 mit im Querschnitt kreuz- bzw. winkelförmigen Kolbenstangen 25 bzw. 26 verbunden, die an ihrem hinteren Ende über eine Traverse 27 starr miteinander verbunden sind. Die Gelenke 23, 24 bilden eine derartige lose Kopplung, daß die Kolben 15, 16 relativ zu ihren Kolbenstangen 25, 26 schwenkbar sowie geringfügig seitlich verschiebbar sind. Dadurch wird erreicht, daß die Kolben 15, 16 sich innerhalb der Kartuschen 12, 13 selbst zentrieren können und nicht verkanten und blockieren, wenn die Kolbenstangen 25, 26 beim Vorschub oder beim Zurückziehen außer Fluchtung mit den Kartuschenachsen gelangen sollten. Dadurch wird die Leichtgängigkeit der Kolbenbewegung sichergestellt.The two pistons 15 and 16 are connected via joints 23, 24 to cross-sectionally or angularly shaped piston rods 25 and 26, which are rigidly connected to one another at their rear end by means of a cross member 27. The joints 23, 24 form such a loose coupling that the pistons 15, 16 are pivotable relative to their piston rods 25, 26 and are slightly displaceable laterally. This ensures that the pistons 15, 16 can center themselves within the cartridges 12, 13 and do not tilt and block when the piston rods 25, 26 are out of alignment when being advanced or retracted should come with the cartridge axes. This ensures smooth movement of the piston.

Der Kolbenantrieb erfolgt von dem Motor 17 über ein Untersetzungsgetriebe 28 auf die Antriebsscheibe 29 einer Magnetkupplung 30, deren Abtriebsscheibe 31 auf eine Zwischenwelle 32 aufgekeilt ist. An ihrem anderen Ende trägt die Zwischenwelle 32 ein an der Außenseite des Gehäuses 10 zugängliches Handrad 33. Die Zwischenwelle 32 treibt zwei Ketten 34, an denen die die Kolbenstangen 25, 26 miteinander verbindende Traverse 27 befestigt ist.The piston is driven by the motor 17 via a reduction gear 28 onto the drive disk 29 of a magnetic coupling 30, the driven disk 31 of which is wedged onto an intermediate shaft 32. At its other end, the intermediate shaft 32 carries a handwheel 33 which is accessible on the outside of the housing 10. The intermediate shaft 32 drives two chains 34, to which the crossbar 27 connecting the piston rods 25, 26 is fastened.

Der Antrieb der Welle 18 erfolgt von dem Motor 20 über ein Getriebe 35, ein auf dessen Abtriebswelle sitzendes Ritzel 36 und ein mit diesem kämmendes, auf der Welle 18 befestigtes Ritzel 37.The shaft 18 is driven by the motor 20 via a gear 35, a pinion 36 seated on its output shaft and a pinion 37 meshing with it and fastened on the shaft 18.

Die Welle 18 ist in Axialrichtung verschiebbar gelagert und wird in Eingriffsrichtung mit dem Mischerelement 19 (in Figur 1 und 3 nach rechts) durch eine Druckfeder 38 vorgespannt, die zwischen dem Ritzel 37 und einem-hinteren Lagerbügel 39 angeordnet ist. Die miteinander kämmenden Zähne der Ritzel 36 und 37 weisen eine ausreichende axiale Länge auf, um noch in Eingriff zu bleiben, wenn die Welle 18 gemäß Figur 1 und 3 so weit nach links verschoben ist, daß ihr am vorderen Ende vorgesehener Sechskant 40 aus seinem Eingriff mit dem Mischerelement 19 zurückgezogen ist.The shaft 18 is mounted so as to be displaceable in the axial direction and is biased in the direction of engagement with the mixer element 19 (to the right in FIGS. 1 and 3) by a compression spring 38 which is arranged between the pinion 37 and a rear bearing bracket 39. The intermeshing teeth of the pinions 36 and 37 are of sufficient axial length to remain in engagement when the shaft 18 according to FIGS. 1 and 3 is displaced to the left so far that its hexagon 40 provided at the front end is disengaged is withdrawn with the mixer element 19.

In Figur 1 sind die Kolben 15, 16 in einer Stellung gezeigt, in der sie gerade noch in das hintere Ende der Kartuschen 12, 13 eingreifen. In dieser Stellung liegen ihre hinteren Flächen an der Vorderfläche des Ritzels 37 an. Werden die Kolben 15, 16 noch weiter nach links zurückgeführt, so nehmen sie das Ritzel 37 nach links mit, wodurch die Welle 18 außer Eingriff mit dem Mischerelement 19 gebracht wird.In Figure 1, the pistons 15, 16 are shown in a position in which they just engage in the rear end of the cartridges 12, 13. In this position, their rear surfaces lie against the front surface of the pinion 37. If the pistons 15, 16 are moved further back to the left, they take the pinion 37 with them to the left, as a result of which the shaft 18 is disengaged from the mixer element 19.

In der in Figur 1 gezeigten Stellung befinden sich die Kolben 15, 16 innerhalb der Führungszylinder 41 bzw. 42, die eine zylindrische innere Führungsfläche aufweisen und sich in Richtung der Kartuschen 12, 13 mit einer sich erweiternden Kegelfläche öffnen. Die Führungszylinder 41, 42 übernehmen die Führung der mit den Kolbenstangen 25, 26 lose gekoppelten Kolben 15, 16, wenn diese sich außerhalb der Kartuschen 12, 13 befinden, und bewirken ein fluchtendes Einführen der Kolben in die Kartuschen. Die Kegelflächen erleichtern das Einführen der Kolben 15, 16 in die Führungszylinder 41, 42 für den Fall, daß diese bei fehlenden Kartuschen 12, 13 vorgeschoben worden sind.In the position shown in FIG. 1, the pistons 15, 16 are located inside the guide cylinders 41 and 42, which have a cylindrical inner guide surface and open in the direction of the cartridges 12, 13 with an expanding conical surface. The guide cylinders 41, 42 take over Guiding the pistons 15, 16 which are loosely coupled to the piston rods 25, 26, if these are located outside the cartridges 12, 13, and bring about an aligned insertion of the pistons into the cartridges. The conical surfaces facilitate the insertion of the pistons 15, 16 into the guide cylinders 41, 42 in the event that these have been pushed forward when cartridges 12, 13 are missing.

Die Komponenten der zu erzeugenden Masse können unmittelbar in die Kartuschen 12, 13 eingefüllt sein, wobei in diesem Fall die Kolben 15, 16 auf ein die Kartuschen nach hinten verschließendes Vorschubelement arbeiten. In anderer Ausführungsform können die Komponenten in Folienbeuteln enthalten sein, die in die Kartuschen 12, 13 eingelegt werden und mit Hilfe der Kolben 15, 16 ausgedrückt werden.The components of the mass to be produced can be filled directly into the cartridges 12, 13, in which case the pistons 15, 16 work on a feed element which closes the cartridges to the rear. In another embodiment, the components can be contained in foil bags which are inserted into the cartridges 12, 13 and are pressed out using the pistons 15, 16.

Beim Betrieb wird zunächst eine aus gefüllten Kartuschen 12, 13 mit an diese angesetztem Mischkopf 14 bestehende Einheit in die Aufnahme 11 des Gerätes eingelegt, und die Kolben 15, 16 werden bei ausgerückter Magnetkupplung 30 mit Hilfe des Handrades 33 soweit vorgeschoben, daß sie auf der hinteren Begrenzung der Füllung (den oben erwähnten Vorschubelementen oder Folienbeuteln) aufliegen. Sodann werden mit einem (nicht gezeigten) Schalter gleichzeitig die beiden Elektromotoren 17 und 20 eingeschaltet und die Magnetkupplung 30 eingerückt. Die Kolben 15, 16 werden dabei langsam innerhalb der Kartuschen 12, 13 vorgeschoben, wodurch die beiden Komponenten in den Mischkopf 14 eingedrückt werden. Gleichzeitig rotiert das Mischerelement 19 und bewirkt eine Vermischung der Komponenten unter Bildung einer gebrauchsfertigen Masse, die an der Ausbringöffnung 22 des Mischkopfes 14 herausgepreßt wird. Nach Ausbringen einer gewünschten Menge wird das Gerät abgeschaltet. Die Kolben 15, 16 befinden sich dann in einer Zwischenstellung im Innern der Kartuschen 12, 13.During operation, a cartridge 12, 13 with a mixing head 14 attached to it is first inserted into the receptacle 11 of the device, and the pistons 15, 16 are advanced with the magnetic clutch 30 disengaged by means of the handwheel 33 so far that they are on the rest of the filling (the feed elements or foil bags mentioned above). Then the two electric motors 17 and 20 are switched on simultaneously with a switch (not shown) and the magnetic clutch 30 is engaged. The pistons 15, 16 are slowly advanced within the cartridges 12, 13, whereby the two components are pressed into the mixing head 14. At the same time, the mixer element 19 rotates and mixes the components to form a ready-to-use mass which is pressed out at the discharge opening 22 of the mixing head 14. After dispensing a desired amount, the device is switched off. The pistons 15, 16 are then in an intermediate position inside the cartridges 12, 13.

Soll nun mit dem gleichen Gerät ein anderes Material angemischt und ausgebracht werden, so lassen sich die Kolben 15, 16 durch Drehen des Handrades 33 aus den Kartuschen 12, 13 nach hinten herausführen. Am Ende dieser Rückführbewegung nehmen die Kolben 15, 16 das Ritzel 37 gegen die Vorspannung der Druckfeder 38 in Figur 1 nach links mit, wodurch der am vorderen Ende der Welle 18 vorgesehene Sechskant 40 außer Eingriff mit dem Mischerelement 19 gelangt. In dieser Stellung kann die aus den Kartuschen 12, 13 sowie dem Mischkopf 14 bestehende Einheit in einer zur Vorschubrichtung der Kolben 15, 16 senkrechten Richtung, nämlich in Figur 2 nach oben, aus dem Gerät entnommen und durch einen anderen Kartuschensatz mit Mischkopf ersetzt werden.If another material is now to be mixed and applied with the same device, the pistons 15, 16 can be guided out of the cartridges 12, 13 to the rear by turning the handwheel 33. At the end of this return movement, the pistons 15, 16 take the pinion 37 against the bias of the compression spring 38 to the left in FIG. 1, as a result of which the hexagon 40 provided at the front end of the shaft 18 disengages from the mixer element 19. In this position, the unit consisting of the cartridges 12, 13 and the mixing head 14 can be removed from the device in a direction perpendicular to the direction of advance of the pistons 15, 16, namely upwards in FIG. 2, and replaced by another set of cartridges with a mixing head.

Da die Bewegung der Kolben 15, 16 beim Herausziehen aus den Kartuschen 12, 13 ebenso wie beim Einführen in diese manuell anhand des Handrades 33 erfolgt, das auf der die Ketten 34 und damit die Kolben unmittelbar antreibenden Zwischenwelle 32 sitzt, läßt sich diese Bewegung schnell und für den Anwender einsichtig durchführen. Ein Wechsel der Kartuschen, sei es bei Teilfüllung zum Produktwechsel, sei es beim Ersatz vollständig entleerter Kartuschen, ist daher schnell und mit wenigen Handgriffen durchzuführen.Since the movement of the pistons 15, 16 when pulling them out of the cartridges 12, 13, as well as when they are inserted into them, is carried out manually by means of the handwheel 33, which is located on the intermediate shaft 32 which drives the chains 34 and thus the pistons, this movement can be carried out quickly and perform it clearly for the user. Changing the cartridges, be it for partial filling to change the product or replacing completely empty cartridges, is therefore quick and easy.

Claims (11)

  1. An apparatus for mixing and dispensing multiple-component substances, comprising
       a housing (10) for receiving at least two cartridges (12, 13) each containing one component, and a mixer head (14) connected to the cartridges,
       a shaft (18) driven by a motor for rotating a mixer element (19) disposed in the mixer head (14), and
       pistons (15, 16) connected via clutch (30) to a drive motor (17) for emptying the cartridges (12, 13) by pressure, and adapted to be retracted at a speed higher than their advancing speed for exchanging the cartridges (12, 13),
       characterised by handle means (33) accessible from outside the housing (10) for manually advancing and retracting the pistons (15, 16) when the clutch (30) is disengaged.
  2. The apparatus of claim 1, wherein the clutch is a magnetic clutch (30) adapted to be engaged and disengaged simultaneously with the piston drive motor (17) being switched on and off.
  3. The apparatus of claim 1 or 2, wherein the shaft (18) is axially movably supported in the housing (10) and adapted to be disengaged from the mixer element (19) by being retracted.
  4. The apparatus of claim 3, wherein a piston advancing element is movable parallel to the axis (18) and positively moves the shaft (18) during the final portion of its retracting motion.
  5. The apparatus of claim 3 or 4, including a spring (38) biasing the shaft (18) into engagement with the mixer element (19).
  6. The apparatus of claim 4 or 5, wherein the shaft (18) is driven through a pair of pinions (36, 37) which are axially displaceable with respect to each other, the pinion (37) mounted on the shaft (18) having an abutment surface for the pistons (15, 16).
  7. The apparatus of any one of claims 1 to 6, wherein the handle means is formed by a hand wheel (33) which is mounted on an output shaft (32) of the clutch (30) driving the pistons (15, 16).
  8. The apparatus of any one of claims 1 to 7, wherein the pistons (15, 16) are interconnected for common advancement and retraction.
  9. The apparatus of any one of claims 1 to 8, wherein each piston (15, 16) is loosely coupled to a piston rod (25, 26) connected to the drive.
  10. The apparatus of claim 9, wherein a centering guide (41, 42) for the respective piston (15, 16) is disposed at the rear side of each cartridge (12, 13).
  11. The apparatus of claim 10, wherein the centering guide (41, 42) has an inner cylindrical surface having a conical surface that opens outwardly towards the respective cartridge (12, 13).
EP91121735A 1990-12-21 1991-12-18 Device for mixing and applying masses composed of several components Expired - Lifetime EP0492413B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9017322U 1990-12-21
DE9017322U DE9017322U1 (en) 1990-12-21 1990-12-21

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EP0492413B1 true EP0492413B1 (en) 1994-11-30

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EP (1) EP0492413B1 (en)
JP (1) JP3181958B2 (en)
AT (1) ATE114496T1 (en)
DE (2) DE9017322U1 (en)
ES (1) ES2064867T3 (en)

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DE9017322U1 (en) 1992-04-16
JP3181958B2 (en) 2001-07-03
EP0492413A1 (en) 1992-07-01
ES2064867T3 (en) 1995-02-01
ATE114496T1 (en) 1994-12-15
DE59103689D1 (en) 1995-01-12
JPH04284838A (en) 1992-10-09
US5286105A (en) 1994-02-15

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