EP3095528B1 - Application device for paste masses - Google Patents

Application device for paste masses Download PDF

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Publication number
EP3095528B1
EP3095528B1 EP16163750.9A EP16163750A EP3095528B1 EP 3095528 B1 EP3095528 B1 EP 3095528B1 EP 16163750 A EP16163750 A EP 16163750A EP 3095528 B1 EP3095528 B1 EP 3095528B1
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EP
European Patent Office
Prior art keywords
premixing chamber
discharge apparatus
bore
shaped feed
insert
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.)
Active
Application number
EP16163750.9A
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German (de)
French (fr)
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EP3095528A2 (en
EP3095528A3 (en
Inventor
Thomas Muschalek
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.)
Rublic and Canzler GmbH
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Rublic and Canzler GmbH
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Publication date
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Publication of EP3095528A2 publication Critical patent/EP3095528A2/en
Publication of EP3095528A3 publication Critical patent/EP3095528A3/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3131—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/716—Feed mechanisms characterised by the relative arrangement of the containers for feeding or mixing the components
    • B01F35/7164—Feed mechanisms characterised by the relative arrangement of the containers for feeding or mixing the components the containers being placed in parallel before contacting the contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/2305—Mixers of the two-component package type, i.e. where at least two components are separately stored, and are mixed in the moment of application
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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

Definitions

  • the invention relates to a discharge device for merging and dispensing pasty masses, which has a premixing chamber for processing a pasty, curable material consisting of at least two components.
  • Multi-component materials such as adhesives, sealants, joint compounds or the like are usually produced by mixing two or more components of the material together immediately prior to application.
  • Various designs of discharge devices, for example so-called glue guns, are known for this purpose.
  • known adhesive guns usually have two (or more) receptacles for several, usually two, each containing one of the two components container , wherein usually the container of a first component has a larger diameter than the one or more containers of one or each of a second component, which should be mixed as well as possible with the first component in order to achieve a uniform chemical reaction between the components.
  • the containers may be, for example tubular cartridges, which are often made of plastic and disposed of after complete emptying. This type of containers is mainly used in home improvement used. On the other hand, in the professional field in particular containers are often used in which the components are packaged in tubular bags. In these containers, it is necessary to provide at the discharge a guide element which ensures a clean emptying. This can for example be realized in that the receptacle for the container is designed as a tube sleeve.
  • the thereby necessary opening of the container can for example be done by the user cuts the tubular bag before starting work in connection with the insertion into the receptacle, or in the receptacle one or more Aufstechieri are arranged, which penetrate the container during insertion, so that the corresponding component can escape.
  • the containers may in this case be connected to a premixing chamber belonging to the discharge device, into which the components emerging from the containers enter and are combined and roughly mixed with one another.
  • the components are introduced side by side in the premixing chamber, so that in the emerging from the discharge port strand, the individual components are still relatively separated from each other.
  • Discharge devices are known with a premixing chamber in which a dynamic mixer is arranged, for example in the form of a turbine-like arrangement of mixing blades on a rotor ( DE 90 17 323 U1 .
  • WO 2009/071318 A2 Discharge devices are known with a premixing chamber in which a dynamic mixer is arranged, for example in the form of a turbine-like arrangement of mixing blades on a rotor
  • a squeezing device for example a mechanically, pneumatically or electrically actuated cylinder, which may also have a plurality of pistons, for example one piston for each component to be mixed, simultaneously acts on all containers involved, so that the respective contents of the containers pass through the premixing chamber Direction is displaced to a dispensing opening. Before or in this dispensing opening, the components are mixed together, but a complete mixing is usually not achieved, as already described above.
  • a so-called static mixer is usually attached to the discharge opening.
  • This is usually an elongated spout inside which a plurality of swirling elements are disposed at fixed positions which successively swirl the still incompletely mixed strand containing components to be mixed which leaves the dispensing opening to progressively mix the components , with the aim of obtaining a homogeneous, completely mixed mass at the outlet of the static mixer.
  • discharge devices are known in which the various components, for example, introduced laterally directly into the static mixer and only there are mixed together. Examples of this are in DE 31 03 610 A1 . EP 0 057 465 A2 . FR 2 702 396 A1 . DE 695 20 513 T2 and EP 0 721 805 A2 described. Subsequently, as described above, the mass is then homogenized while passing through the arrangement of turbulence elements. In this case, the discharge device itself has no premixing chamber.
  • the static mixer is usually made of plastic part, which is delivered with the filled containers and disposed of after complete emptying of the container together with these, so that a Cleaning is not necessary.
  • DE 40 26 685 A1 has set itself the task of specifying a method and a discharge device, with which two pasty masses in a certain predetermined volume ratio can be constantly brought together so that always a closed outer layer of mass coming from the chamber of larger diameter remains around the other mass.
  • a discharge device for bringing together two pasty masses of different or the same viscosity from two different diameter, arranged parallel to each other chambers of a mixing device in which the exit region of the chamber of larger diameter a the outlet region of the chamber of smaller diameter forming feed nozzle to the output latter, forming an annulus completely surrounds.
  • a discharge device for merging at least two pasty masses is proposed, the receptacles for at least two exchangeable container, at least one acting on the container squeezing and directly connectable to the containers premixing chamber element with a premixing chamber having a longitudinal axis and a chamber cross-section, and a first input for a first pasty mass, at least one second input for a second pasty mass, to which a feed channel with a centrally opening in the chamber cross-section discharge opening connects, and a common output for a mixture of pasty masses, to which a static Mixer is attachable, wherein the one channel portion of the feed channel on which the discharge opening is arranged, perpendicular to the longitudinal axis in the premixing chamber extends into it.
  • the proposed solution makes it possible in contrast to the known solution according to DE 40 26 685 A1 in fact, the second component is embedded and completely enclosed by the first component. Since the supply channel of the second component projects into the pre-mixing chamber at right angles to the longitudinal axis, the first component can occur over the entire chamber cross-section over its entire area. As a result, the first component completely circumscribes the feed channel, the strand of the second component emerging from the discharge opening being trapped by the first component and the resulting strand of both components completely displacing the air from the premixing chamber. The thorough mixing of the components is then carried out in a known manner when passing through the static mixer.
  • the premixing chamber element comprises a base body and an insert which can be exchanged in the main body and delimits the premixing chamber.
  • the body can be a relatively massive, i. have solid structure, which is firmly installed in a discharge and reusable.
  • the interchangeable insert forms and limits the actual premixing chamber, in which the merging of the two components takes place.
  • the replaceable insert can be easily removed and disposed of after use, eliminating the need for cleaning.
  • the replaceable insert can be produced inexpensively, for example by injection molding. For example, such an insert can be supplied with each adhesive package, so that the user can always have a new insert when a new container is broken.
  • the insert extends from the first input to the common outlet of the premixing chamber element. In this way, it is completely prevented that the main body comes into contact with the pasty masses.
  • the premixing chamber element has anti-rotation means for preventing a relative rotation between the base body and the insert.
  • the one or more anti-rotation means can advantageously be designed so that they not only a relative rotation prevent, but at the same time enforce the correct position installation of the insert in the body.
  • the insert may have a projection and the base body may have a recess corresponding to the projection, such as a groove or the like. The insert can then be used only in the body when the projection engages the recess, so that a twisted installation of the insert is prevented in the body.
  • the premixing chamber element can have displacement-securing means for preventing a relative displacement between the base body and the insert, so that the insert, for example when replacing a deflated container with a full container, can not accidentally fall out. If two or more containers are processed directly one after the other, an exchange of the insert is not necessary.
  • a displacement securing means may be, for example, a screw arranged in a through bore of the base body, which acts on the insert and clamps it in the base body.
  • the supply channel is formed in a rod-shaped feed element. Since the premixing chamber element has a relatively complex shape, it can advantageously be produced, for example, by injection molding or by machining from plastic. In order to be able to form the supply channel on the one hand with the required strength and on the other hand removable for cleaning purposes, it is proposed that a rod-shaped feed element is arranged on and in the premixing chamber element, which can be made of a metallic material, for example. A central bore along the rod axis can form the supply channel.
  • a rod-shaped feed element can at a Embodiment in which the premixing chamber element comprises a base body and a replaceable insert, also be part of the insert. If the insert is made of plastic by injection molding, the rod-shaped feed element can be produced, for example, in one piece with the insert. In this case, no separate component is needed for the rod-shaped feed element.
  • the feed element is releasably secured in a first bore of the premixing chamber element.
  • the first bore can have an internal thread and the rod-shaped feed element can have a corresponding external thread.
  • the first bore in the premixing chamber element is guided on one side from the outside as a through-bore into the premixing chamber.
  • This embodiment allows a detachable attachment of the rod-shaped feed element to the premixing chamber element and its removal as needed to the side.
  • the rod-shaped feed element ends at the discharge opening.
  • the rod-shaped feed element ends in the middle of the premixing chamber, so that a directional attachment of a discharge opening for the second component is not needed.
  • the rod-shaped feed element extends transversely through the entire chamber cross-section.
  • the first component is a transversely through the Chamber cross-section equal flow resistance opposed, so that the embedding of the second component can be made even more precise in the middle of the first component.
  • the rod-shaped feed element is supported on the opposite side of the first bore of the premixing chamber in a second bore.
  • a discharge port to the rod-shaped delivery member at a location which is in the center of the premixing chamber when assembled.
  • the second bore can be advantageously designed as a blind hole to prevent unwanted leakage of the first component.
  • the rod-shaped feed element extends transversely through the entire chamber cross-section and the discharge opening on the rod-shaped feed element at a location which is in the mounted state in the middle of the premixing chamber, it is advantageous to provide that the discharge opening to the common Exit facing.
  • the rod-shaped feed element has a visible from outside of the premixing chamber element direction indicator.
  • a notch may be provided on its upper side indicating the orientation of the discharge opening on the rod-shaped feed element. The rod-shaped feed element could then be aligned when screwed into the premixing chamber member so that the notch is aligned with the common outlet of the premixing chamber.
  • the rod-shaped feed element protrudes from the premixing chamber element at at least one of its ends and has a toggle at this end.
  • the two latter features can be combined with each other so that the toggle is the direction indicator, i. the toggle indicates the dispensing direction of the dispensing opening.
  • the rod-shaped delivery member could then be aligned upon screwing into the premixing chamber member so that the toggle is aligned with the common exit of the premixing chamber.
  • the premixing chamber element has an external thread in the form of a round thread, flat thread or trapezoidal thread in the region of the common outlet.
  • the static mixer can be mounted in a conventional manner. Since the static mixers are usually disposable, disposed of with the empty containers after each use, the thread provided on the premixing chamber member must endure many screwing operations without excessive wear. In addition, the thread needs to be cleaned so adhesive residues will not render it unusable over time. Both requirements are well supported by the proposed thread types.
  • Fig. 1 shows a side view of a discharge device 1 in the form of an adhesive gun, in which a first component and a second component in a premixing chamber element 9 of the discharge device 1 are mixed together and then discharged through a static mixer 6 replaceably mounted on the premixing chamber element 9 of the discharge device 1.
  • the first component is provided in a first container 7 in the form of a tubular bag which is inserted into a tubular sleeve, which in turn is attached to a first inlet 11 of the premixing chamber element 9.
  • the second component is provided in a second container 8 in the form of a plastic tube attached to a second inlet 12 of the premixing chamber element 9.
  • the discharge device 1 also has a pneumatically acting on both containers 7, 8 simultaneously driven squeezing device 2, to which the premixing chamber element 9 is attached by means of spacer rods at a distance such that the containers 7, 8 can be received between the squeezing device 2 and the premixing chamber element 9.
  • this also has a handle 3 with an actuating element 4 for the squeezing device 2, through which the squeezing device 2 is acted upon by compressed air which is supplied to the discharge device 1 at the end of the handle 3 via a compressed air connection 5.
  • Fig. 2 shows how the second component of the first component in a premixing chamber 10 according to the invention is fed centrally.
  • the currents of the two components from the two inputs 11, 12 are shown to the common output 13 by flow lines.
  • the second component is radially supplied to the premixing chamber 10 through a rod-shaped delivery member 18 having the delivery channel 15 and delivered centrally from a centrally located delivery port 17 into the flow of the first component.
  • Fig. 3 to 5 show a first embodiment of a premixing chamber element 9, with which the functional principle of the centric mixture according to the invention is realized.
  • the premixing chamber element 9 has a premixing chamber 10 arranged therein.
  • the premixing chamber element 9 has two inlets 11, 12 through which a component is supplied to the premixing chamber 10. While the first input 11 for the first component is coaxial with the premixing chamber 10, the second input 12 for the second component is disposed laterally adjacent thereto.
  • a feed channel 15 for the second component extends at right angles to the longitudinal axis into the premixing chamber 10 into it.
  • the feed channel 15 is formed as an axially parallel bore in a rod-shaped feed element 18 which is releasably secured in a first bore 19 of the premixing chamber element 9 by means of thread 21.
  • the rod-shaped feed element 18 extends transversely through the entire chamber cross-section.
  • the first bore 19 is guided unilaterally in the premixing chamber element 9 from the outside as a through-bore into the premixing chamber 10, in which the rod-shaped feed element 18 is arranged and fixed by means of thread 21.
  • This first bore 19 is guided from the side of the first input 11 for the first component ago to the premixing chamber 10, from where also the rod-shaped feed element 18 is inserted into the first bore 19 and screwed therein.
  • the rod-shaped feed element 18 is also supported on the opposite side of the first bore 19 of the premixing chamber 10 in a second bore 20 which is designed as a blind hole.
  • This second bore 20 extends into the second input 12 for the second component, and the rod-shaped delivery member 18 is open at that end, i. it forms at its end an inlet opening 16, through which the second component can enter into the rod-shaped feed element 18 and thus into the feed channel 15.
  • the rod-shaped feed member 18 protrudes with one of its ends on the side of the first input 11 for the first component from the premixing chamber element 9. At this end of the rod-shaped feed element 18 is a gag for the tool-less mounting of the rod-shaped feed element 18 is arranged, which serves as a visible from outside of the premixing chamber element 9 direction indicator 22, because the toggle and the discharge opening 17 of the rod-shaped feed element 18 are both in the same direction.
  • the premixing chamber element 9 has, in the region of the common outlet 13, an external thread 14 in the form of a trapezoidal thread, which serves for the releasable attachment of a static mixer 6 and which is wear-resistant and easy to clean.
  • the 6 and 7 show a second embodiment of a premixing chamber element 9, with which the functional principle of the centric mixture according to the invention is realized.
  • This second embodiment differs from the first embodiment in that the first bore 19 is guided from the side of the second input 12 for the second component ago to the premixing chamber 10, from where also the rod-shaped feed element 18 is inserted into the first bore 19 and therein is screwed.
  • the first bore 19 leads through the second input 12 for the second component, and the rod-shaped feed element 18 has at this point a lateral inlet opening 16, so that the second component can enter the rod-shaped feed element 18 and thus into the feed channel 15.
  • the 8 and 9 show a third embodiment of a premixing chamber element 9, with which the functional principle of the centric mixture according to the invention is realized.
  • This third embodiment differs from the second embodiment in that the rod-shaped feed element 18 is similarly supported in the first embodiment on the opposite side of the first bore 19 Vormischsch 10 in a second bore 20, which is designed as a blind bore, wherein respect to the Premixing chamber 10 centrally disposed discharge opening 17, which forms the end of the feed channel 15, arranged laterally on the rod-shaped feed element 18 and the common output 13 of the premixing chamber 10 faces.
  • the 10 and 11 show a fourth embodiment of a premixing chamber element 9, with which the functional principle of the centric mixture according to the invention is realized.
  • This fourth exemplary embodiment differs from the other exemplary embodiments in that the premixing chamber element 9 comprises a main body 9a and an insert 9b, which is interchangeable in the main body 9a and delimits the premixing chamber 10.
  • the insert 9b extends from the first inlet 11, to which a container for a first pasty mass can be attached, to the common outlet 13, so that the base body 9a can not come into contact with the pasty masses.
  • the premixing chamber element 9 has anti-rotation means in the form of a recess 9c in the base body 9a and a projection 9d of the insert 9b corresponding to the recess 9c, which cooperate so as to force a correct installation of the insert 9b in the base body 9a and a relative rotation between the base body 9a and Counteract insert 9b.
  • a displacement securing means in the form of a screw 9e which clamps the insert 9b in the base body 9a, prevents a relative displacement between the base body 9a and insert 9b and thus also the unintentional falling out of the insert 9b from the base body 9a.
  • the rod-shaped feed element 18 which is an integral part of the insert 9b and is disposed of with it after use.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Accessories For Mixers (AREA)
  • Basic Packing Technique (AREA)

Description

Die Erfindung betrifft eine Austragvorrichtung zum Zusammenführen und Abgeben pastöser Massen, die eine Vormischkammer aufweist, zur Verarbeitung eines aus mindestens zwei Komponenten bestehenden pastösen, aushärtbaren Werkstoffs. Mehrkomponentige Werkstoffe wie Klebstoffe, Dichtstoffe, Fugenmassen oder dergleichen werden üblicherweise dadurch erzeugt, dass zwei oder mehr Komponenten des Werkstoffs unmittelbar vor der Ausbringung miteinander vermischt werden. Hierfür sind verschiedenste Ausgestaltungen von Austragvorrichtungen, beispielsweise so genannte Klebstoffpistolen, bekannt. Da in den meisten Fällen eine erste Komponente und eine zweite Komponente vermischt werden müssen, wobei im allgemeinen das angestrebte Mischungsverhältnis ungleich 1 ist, weisen bekannte Klebstoffpistolen üblicherweise zwei (oder mehr) Aufnahmen für mehrere, meist zwei, je eine der beiden Komponenten enthaltende Behälter auf, wobei meist der Behälter einer ersten Komponente einen größeren Durchmesser aufweist als der oder die Behälter einer oder je einer zweiten Komponente, die mit der ersten Komponente möglichst gut vermischt werden soll, um eine gleichmäßige chemische Reaktion zwischen den Komponenten zu erzielen.The invention relates to a discharge device for merging and dispensing pasty masses, which has a premixing chamber for processing a pasty, curable material consisting of at least two components. Multi-component materials such as adhesives, sealants, joint compounds or the like are usually produced by mixing two or more components of the material together immediately prior to application. Various designs of discharge devices, for example so-called glue guns, are known for this purpose. Since in most cases a first component and a second component must be mixed, wherein generally the desired mixing ratio is not equal to 1, known adhesive guns usually have two (or more) receptacles for several, usually two, each containing one of the two components container , wherein usually the container of a first component has a larger diameter than the one or more containers of one or each of a second component, which should be mixed as well as possible with the first component in order to achieve a uniform chemical reaction between the components.

Die Behälter können dabei beispielsweise rohrförmige Kartuschen sein, die häufig aus Kunststoff hergestellt sind und nach der vollständigen Entleerung entsorgt werden. Diese Art von Behältern wird hauptsächlich im Heimwerkerbereich verwendet. Insbesondere im professionellen Bereich kommen dagegen oftmals Behälter zur Anwendung, bei denen die Komponenten in Schlauchbeuteln abgepackt sind. Bei diesen Behältern ist es notwendig, an der Austragvorrichtung ein Führungselement vorzusehen, das ein sauberes Entleeren sicherstellt. Dies kann beispielsweise dadurch realisiert sein, dass die Aufnahme für den Behälter als Rohrhülse ausgeführt ist. Das dabei nötige Öffnen des Behälters kann beispielsweise dadurch geschehen, dass der Anwender den Schlauchbeutel vor Beginn der Arbeit im Zusammenhang mit dem Einlegen in die Aufnahme aufschneidet, oder in der Aufnahme sind ein oder mehrere Aufstechelemente angeordnet, die den Behälter beim Einlegen penetrieren, so dass die entsprechende Komponente austreten kann.The containers may be, for example tubular cartridges, which are often made of plastic and disposed of after complete emptying. This type of containers is mainly used in home improvement used. On the other hand, in the professional field in particular containers are often used in which the components are packaged in tubular bags. In these containers, it is necessary to provide at the discharge a guide element which ensures a clean emptying. This can for example be realized in that the receptacle for the container is designed as a tube sleeve. The thereby necessary opening of the container can for example be done by the user cuts the tubular bag before starting work in connection with the insertion into the receptacle, or in the receptacle one or more Aufstechelemente are arranged, which penetrate the container during insertion, so that the corresponding component can escape.

Die Behälter können dabei mit einer zu der Austragvorrichtung gehörenden Vormischkammer verbunden sein, in welche die aus den Behältern austretenden Komponenten eintreten und dabei zusammengeführt und grob miteinander vermengt werden. Bei vielen bekannten Austragvorrichtungen werden die Komponenten nebeneinander in die Vormischkammer eingeführt, so dass in dem aus der Ausgabeöffnung austretenden Strang die einzelnen Komponenten noch relativ stark voneinander abgegrenzt sind.The containers may in this case be connected to a premixing chamber belonging to the discharge device, into which the components emerging from the containers enter and are combined and roughly mixed with one another. In many known discharge devices, the components are introduced side by side in the premixing chamber, so that in the emerging from the discharge port strand, the individual components are still relatively separated from each other.

Es sind Austragvorrichtungen bekannt mit einer Vormischkammer, in der ein dynamischer Mischer angeordnet ist, beispielsweise in Form einer turbinenartigen Anordnung von Mischflügeln auf einem Rotor ( DE 90 17 323 U1 , EP 1 510 248 A1 , WO 2009/033832 A1 , WO 2009/071318 A2 ).Discharge devices are known with a premixing chamber in which a dynamic mixer is arranged, for example in the form of a turbine-like arrangement of mixing blades on a rotor ( DE 90 17 323 U1 . EP 1 510 248 A1 . WO 2009/033832 A1 . WO 2009/071318 A2 ).

Eine Ausdrückeinrichtung, beispielsweise ein mechanisch, pneumatisch oder elektrisch betätigter Zylinder, der auch mehrere Kolben, beispielsweise je einen Kolben für jede zu vermischende Komponente aufweisen kann, wirkt gleichzeitig auf alle beteiligten Behälter ein, so dass der jeweilige Inhalt der Behälter durch die Vormischkammer hindurch in Richtung auf eine Ausgabeöffnung verdrängt wird. Vor oder in dieser Ausgabeöffnung werden die Komponenten miteinander vermengt, wobei jedoch eine vollständige Durchmischung meist nicht erreicht wird, wie oben bereits beschrieben wurde.A squeezing device, for example a mechanically, pneumatically or electrically actuated cylinder, which may also have a plurality of pistons, for example one piston for each component to be mixed, simultaneously acts on all containers involved, so that the respective contents of the containers pass through the premixing chamber Direction is displaced to a dispensing opening. Before or in this dispensing opening, the components are mixed together, but a complete mixing is usually not achieved, as already described above.

Deshalb wird an der Ausgabeöffnung üblicherweise ein sogenannter statischer Mischer angebracht. Dabei handelt es sich meist um eine langgestreckte Tülle, in deren Innerem mehrere Verwirbelungselemente an festen Positionen angeordnet sind, die den noch unvollständig vermischten, die zu vermischenden Komponenten enthaltenden Strang, der die Ausgabeöffnung verlässt, sukzessive so verwirbelt, dass die Komponenten fortschreitend stärker vermischt werden, mit dem Ziel, am Ausgang des statischen Mischers eine homogene, vollständig durchmischte Masse zu erhalten.Therefore, a so-called static mixer is usually attached to the discharge opening. This is usually an elongated spout inside which a plurality of swirling elements are disposed at fixed positions which successively swirl the still incompletely mixed strand containing components to be mixed which leaves the dispensing opening to progressively mix the components , with the aim of obtaining a homogeneous, completely mixed mass at the outlet of the static mixer.

Werden die Komponenten jedoch nebeneinander in eine Vormischkammer eingeführt, und sind sie aus diesem Grunde an der Ausgabeöffnung der Mischammer wie oben beschrieben noch relativ wenig miteinander vermischt, so zeigt sich, dass auch ein nachfolgend angeordneter statischer Mischer eine vollständig homogene Durchmischung der beteiligten Komponenten nicht erreichen kann.However, if the components are introduced side by side into a premixing chamber, and if they are still relatively little mixed with each other at the discharge opening of the mixing chamber as described above, it is evident that even a subsequently arranged static mixer will not achieve a completely homogeneous mixing of the components involved can.

Es sind auch Austragvorrichtungen bekannt, bei denen die verschiedenen Komponenten beispielsweise seitlich direkt in den statischen Mischer eingeführt und erst dort miteinander vermengt werden. Beispiele hierfür sind in DE 31 03 610 A1 , EP 0 057 465 A2 , FR 2 702 396 A1 , DE 695 20 513 T2 und EP 0 721 805 A2 beschrieben. Nachfolgend wird dann ebenfalls wie oben beschrieben die Masse beim Durchlaufen der Anordnung von Verwirbelungselementen homogenisiert. In diesem Falle weist die Austragvorrichtung selbst keine Vormischkammer auf. Der statische Mischer ist ein meist aus Kunststoff hergestelltes Teil, das mit den gefüllten Behältern ausgeliefert wird und nach der vollständigen Entleerung der Behälter zusammen mit diesen entsorgt wird, so dass eine Reinigung nicht notwendig ist. Wegen der schwierigen Reinigung nach dem Gebrauch werden statische Mischer im Allgemeinen nicht in Vormischkammern von Austragvorrichtungen angeordnet, da diese immer wieder verwendbar sein müssen. Eine Ausnahme stellt in dieser Hinsicht EP 1 892 033 A1 dar, in der eine Kombination eines dynamischen Mischers mit einem statischen Mischer in einer Vormischkammer vorgeschlagen wird.There are also discharge devices are known in which the various components, for example, introduced laterally directly into the static mixer and only there are mixed together. Examples of this are in DE 31 03 610 A1 . EP 0 057 465 A2 . FR 2 702 396 A1 . DE 695 20 513 T2 and EP 0 721 805 A2 described. Subsequently, as described above, the mass is then homogenized while passing through the arrangement of turbulence elements. In this case, the discharge device itself has no premixing chamber. The static mixer is usually made of plastic part, which is delivered with the filled containers and disposed of after complete emptying of the container together with these, so that a Cleaning is not necessary. Because of the difficulty of cleaning after use, static mixers are generally not placed in premixing chambers of discharge devices since they must be reusable over and over again. An exception in this regard EP 1 892 033 A1 in which a combination of a dynamic mixer with a static mixer in a premixing chamber is proposed.

DE 40 26 685 A1 hat sich der Aufgabe gewidmet, ein Verfahren und eine Austragvorrichtung anzugeben, mit welchen zwei pastöse Massen in einem bestimmten vorgegebenen Volumenverhältnis konstant so zusammengeführt werden können, dass stets eine geschlossene Außenschicht der aus der Kammer größeren Durchmessers kommenden Masse um die andere Masse erhalten bleibt. Hierzu wird vorgeschlagen, dass die eine Masse während des Zusammenführens in der anderen Masse eingebettet und von letzterer unvollständig umschlossen wird. Konkret lehrt dieses Dokument eine Austragvorrichtung zum Zusammenführen zweier pastöser Massen unterschiedlicher oder gleicher Viskosität aus zwei unterschiedliche Durchmesser aufweisenden, parallel zueinander angeordneten Kammern eines Mischgerätes bei der der Austrittsbereich der Kammer größeren Durchmessers eine den Austrittsbereich der Kammer geringeren Durchmessers bildende Zuführdüse, um den Ausgang letzterer, einen Ringraum bildend, vollständig umgibt. Da jedoch bei der dortigen Lösung der als Zuführdüse ausgebildete Austrittsbereich der Kammer geringeren Durchmessers schräg in den Austrittsbereich der Kammer größeren Durchmessers eintritt, wird das angestrebte Ziel, dass die eine Masse während des Zusammenführens in der anderen Masse eingebettet und von letzterer vollständig umschlossen wird, nicht zufriedenstellend erreicht. Dies liegt insbesondere daran, dass sich im Bereich der Zuführdüse eine Luftblase bildet, die von der seitlich hinzutretenden ersten Komponente nicht verdrängt werden kann. Ähnliche Lösungen sind auch aus DE 89 00 469 U1 und EP 1 627 690 A1 bekannt. DE 40 26 685 A1 has set itself the task of specifying a method and a discharge device, with which two pasty masses in a certain predetermined volume ratio can be constantly brought together so that always a closed outer layer of mass coming from the chamber of larger diameter remains around the other mass. For this purpose, it is proposed that one mass be embedded in the other mass during the merging and that it is incompletely enclosed by the latter. Specifically, this document teaches a discharge device for bringing together two pasty masses of different or the same viscosity from two different diameter, arranged parallel to each other chambers of a mixing device in which the exit region of the chamber of larger diameter a the outlet region of the chamber of smaller diameter forming feed nozzle to the output latter, forming an annulus completely surrounds. However, since in the local solution of the outlet portion formed as a feed nozzle of the smaller diameter chamber obliquely enters the exit region of the larger diameter chamber, the desired goal that one mass is embedded in the other mass during the Zusammenführens and completely enclosed by the latter, not achieved satisfactorily. This is due, in particular, to the fact that an air bubble forms in the region of the feed nozzle, which is not displaced by the first component which enters laterally can. Similar solutions are also off DE 89 00 469 U1 and EP 1 627 690 A1 known.

Diese Nachteile des bekannten Standes der Technik sollen mit der vorliegenden Erfindung beseitigt werden.These disadvantages of the known art are to be eliminated with the present invention.

Dazu wird eine Austragvorrichtung entsprechend Anspruch 1 zum Zusammenführen von mindestens zwei pastösen Massen vorgeschlagen, die Aufnahmen für mindestens zwei austauschbare Behälter, mindestens eine auf die Behälter wirkende Ausdrückeinrichtung sowie ein mit den Behältern direkt verbindbares Vormischkammerelement mit einer Vormischkammer, die eine Längsachse und einen Kammerquerschnitt, sowie einen ersten Eingang für eine erste pastöse Masse, mindestens einen zweiten Eingang für eine zweite pastöse Masse, an den sich ein Zuführungskanal mit einer in dem Kammerquerschnitt mittig mündenden Abgabeöffnung anschließt, und einen gemeinsamen Ausgang für ein Gemisch der pastösen Massen, an dem ein statischer Mischer anbringbar ist, aufweist, wobei sich derjenige Kanalabschnitt des Zuführungskanals, an dem die Abgabeöffnung angeordnet ist, rechtwinklig zur Längsachse in die Vormischkammer hinein erstreckt.For this purpose, a discharge device according to claim 1 for merging at least two pasty masses is proposed, the receptacles for at least two exchangeable container, at least one acting on the container squeezing and directly connectable to the containers premixing chamber element with a premixing chamber having a longitudinal axis and a chamber cross-section, and a first input for a first pasty mass, at least one second input for a second pasty mass, to which a feed channel with a centrally opening in the chamber cross-section discharge opening connects, and a common output for a mixture of pasty masses, to which a static Mixer is attachable, wherein the one channel portion of the feed channel on which the discharge opening is arranged, perpendicular to the longitudinal axis in the premixing chamber extends into it.

Die vorgeschlagene Lösung ermöglicht es im Gegensatz zu der bekannten Lösung gemäß DE 40 26 685 A1 tatsächlich, dass die zweite Komponente von der ersten Komponente eingebettet und vollständig umschlossen wird. Da der Zuführungskanal der zweiten Komponente rechtwinklig zur Längsachse in die Vormischkammer ragt, kann die erste Komponente vollflächig über den gesamten Kammerquerschnitt eintreten. In der Folge umfließt die erste Komponente den Zuführungskanal vollständig, wobei der aus der Abgabeöffnung austretende Strang der zweiten Komponente von der ersten Komponente eingeschlossen wird und der so entstehende Strang aus beiden Komponenten die Luft aus der Vormischkammer vollständig verdrängt. Die gründliche Durchmischung der Komponenten erfolgt anschließend in bekannter Weise beim Durchlaufen des statischen Mischers.The proposed solution makes it possible in contrast to the known solution according to DE 40 26 685 A1 in fact, the second component is embedded and completely enclosed by the first component. Since the supply channel of the second component projects into the pre-mixing chamber at right angles to the longitudinal axis, the first component can occur over the entire chamber cross-section over its entire area. As a result, the first component completely circumscribes the feed channel, the strand of the second component emerging from the discharge opening being trapped by the first component and the resulting strand of both components completely displacing the air from the premixing chamber. The thorough mixing of the components is then carried out in a known manner when passing through the static mixer.

Gemäß einer Ausgestaltung ist vorgesehen, dass das Vormischkammerelement einen Grundkörper und einen im Grundkörper auswechselbar angeordneten Einsatz umfasst, der die Vormischkammer begrenzt. Dabei kann der Grundkörper eine relativ massive, d.h. feste Struktur aufweisen, die in einer Austragvorrichtung fest verbaut und wiederverwendbar ist. Der auswechselbare Einsatz bildet und begrenzt die eigentliche Vormischkammer, in der die Zusammenführung der beiden Komponenten erfolgt.According to one embodiment, it is provided that the premixing chamber element comprises a base body and an insert which can be exchanged in the main body and delimits the premixing chamber. In this case, the body can be a relatively massive, i. have solid structure, which is firmly installed in a discharge and reusable. The interchangeable insert forms and limits the actual premixing chamber, in which the merging of the two components takes place.

Durch diese Ausgestaltung kann die ansonsten sehr aufwendige Reinigung der Vormischkammer entfallen, die nach jedem Gebrauch nötig ist, damit das Komponentengemisch nicht aushärten und dadurch das gesamte Vormischkammerelement unbrauchbar machen kann. Der auswechselbare Einsatz kann nach Gebrauch einfach entfernt und entsorgt werden, wodurch die Reinigung nicht mehr erforderlich ist. Der auswechselbare Einsatz kann kostengünstig, beispielsweise im Spritzgussverfahren, hergestellt werden. Es kann beispielsweise zu jedem Klebstoffgebinde ein derartiger Einsatz mitgeliefert werden, so dass der Anwender stets über einen neuen Einsatz verfügen kann, wenn ein neues Gebinde angebrochen wird.By this configuration, the otherwise very expensive cleaning of the premixing can be omitted, which is necessary after each use, so that the component mixture does not harden and thereby make the entire premixing chamber element unusable. The replaceable insert can be easily removed and disposed of after use, eliminating the need for cleaning. The replaceable insert can be produced inexpensively, for example by injection molding. For example, such an insert can be supplied with each adhesive package, so that the user can always have a new insert when a new container is broken.

Vorteilhaft kann dabei vorgesehen sein, dass der Einsatz sich vom ersten Eingang bis zum gemeinsamen Ausgang des Vormischkammerelements erstreckt. Auf diese Weise wird vollständig verhindert, dass der Grundkörper mit den pastösen Massen in Berührung kommt.Advantageously, it may be provided that the insert extends from the first input to the common outlet of the premixing chamber element. In this way, it is completely prevented that the main body comes into contact with the pasty masses.

Weiter kann vorgesehen sein, dass das Vormischkammerelement Verdrehsicherungsmittel zur Verhinderung einer Relativverdrehung zwischen Grundkörper und Einsatz aufweist. Das oder die Verdrehsicherungsmittel können vorteilhaft so gestaltet sein, dass sie nicht nur eine Relativverdrehung verhindern, sondern gleichzeitig den lagerichtigen Einbau des Einsatzes in den Grundkörper erzwingen. Beispielsweise kann der Einsatz einen Vorsprung und der Grundkörper eine mit dem Vorsprung korrespondierende Vertiefung wie eine Nut oder dergleichen aufweisen. Der Einsatz lässt sich dann nur in den Grundkörper einsetzen, wenn der Vorsprung in die Vertiefung eingreift, so dass ein verdrehter Einbau des Einsatzes in den Grundkörper verhindert wird.It can further be provided that the premixing chamber element has anti-rotation means for preventing a relative rotation between the base body and the insert. The one or more anti-rotation means can advantageously be designed so that they not only a relative rotation prevent, but at the same time enforce the correct position installation of the insert in the body. For example, the insert may have a projection and the base body may have a recess corresponding to the projection, such as a groove or the like. The insert can then be used only in the body when the projection engages the recess, so that a twisted installation of the insert is prevented in the body.

Weiterhin kann das Vormischkammerelement Verschiebesicherungsmittel zur Verhinderung einer Relativverschiebung zwischen Grundkörper und Einsatz aufweisen, so dass der Einsatz, beispielsweise beim Austausch eines entleerten Behälters gegen einen vollen Behälter, nicht ungewollt herausfallen kann. Werden zwei oder mehrere Behälter direkt nacheinander verarbeitet, ist ein Austausch des Einsatzes nämlich nicht nötig. Ein derartiges Verschiebesicherungsmittel kann beispielsweise eine in einer Durchgangsbohrung des Grundkörpers angeordnete Schraube sein, die auf den Einsatz einwirkt und diesen im Grundkörper festklemmt.Furthermore, the premixing chamber element can have displacement-securing means for preventing a relative displacement between the base body and the insert, so that the insert, for example when replacing a deflated container with a full container, can not accidentally fall out. If two or more containers are processed directly one after the other, an exchange of the insert is not necessary. Such a displacement securing means may be, for example, a screw arranged in a through bore of the base body, which acts on the insert and clamps it in the base body.

Gemäß einer Ausgestaltung ist vorgesehen, dass der Zuführungskanal in einem stabförmigen Zuführungselement ausgebildet ist. Da das Vormischkammerelement eine relativ komplexe Form aufweist, kann es vorteilhaft beispielsweise durch Spritzgießen oder durch spanende Bearbeitung aus Kunststoff hergestellt werden. Um nun den Zuführungskanal einerseits mit der erforderlichen Festigkeit und andererseits zu Reinigungszwecken entfernbar ausbilden zu können, wird vorgeschlagen, dass an und in dem Vormischkammerelement ein stabförmiges Zuführungselement angeordnet ist, das beispielsweise aus einem metallischen Werkstoff hergestellt sein kann. Eine zentrale Bohrung entlang der Stabachse kann dabei den Zuführungskanal bilden.According to one embodiment, it is provided that the supply channel is formed in a rod-shaped feed element. Since the premixing chamber element has a relatively complex shape, it can advantageously be produced, for example, by injection molding or by machining from plastic. In order to be able to form the supply channel on the one hand with the required strength and on the other hand removable for cleaning purposes, it is proposed that a rod-shaped feed element is arranged on and in the premixing chamber element, which can be made of a metallic material, for example. A central bore along the rod axis can form the supply channel.

Ein stabförmiges Zuführungselement kann aber bei einer Ausführung, bei der das Vormischkammerelement einen Grundkörper und einen auswechselbaren Einsatz umfasst, auch Bestandteil des Einsatzes sein. Ist der Einsatz durch Spritzgießen aus Kunststoff hergestellt, so kann das stabförmige Zuführungselement beispielsweise einstückig mit dem Einsatz hergestellt sein. In diesem Falle wird für das stabförmige Zuführungselement kein separates Bauteil benötigt.But a rod-shaped feed element can at a Embodiment in which the premixing chamber element comprises a base body and a replaceable insert, also be part of the insert. If the insert is made of plastic by injection molding, the rod-shaped feed element can be produced, for example, in one piece with the insert. In this case, no separate component is needed for the rod-shaped feed element.

Gemäß einer weiteren Ausgestaltung ist vorgesehen, dass das Zuführungselement in einer ersten Bohrung des Vormischkammerelements lösbar befestigt ist. Wie oben bereits dargelegt, wird dadurch beispielsweise die Reinigung der Vormischkammer und aller damit verbundenen Elemente, die mit den Komponenten in Berührung kommen, wesentlich erleichtert. Die erste Bohrung kann dafür beispielsweise ein Innengewinde und das stabförmige Zuführungselement ein damit korrespondierendes Außengewinde aufweisen.According to a further embodiment it is provided that the feed element is releasably secured in a first bore of the premixing chamber element. As already explained above, for example, the cleaning of the premixing chamber and all associated elements that come into contact with the components, thereby substantially facilitated. For example, the first bore can have an internal thread and the rod-shaped feed element can have a corresponding external thread.

Beispielsweise kann vorgesehen sein, dass die erste Bohrung im Vormischkammerelement einseitig von außen als Durchgangsbohrung bis in die Vormischkammer geführt ist. Diese Ausgestaltung ermöglicht eine lösbare Anbringung des stabförmigen Zuführungselements an dem Vormischkammerelement sowie seine bedarfsweise Entnahme nach der Seite.For example, it can be provided that the first bore in the premixing chamber element is guided on one side from the outside as a through-bore into the premixing chamber. This embodiment allows a detachable attachment of the rod-shaped feed element to the premixing chamber element and its removal as needed to the side.

Weiterhin kann vorgesehen sein, dass das stabförmige Zuführungselement an der Abgabeöffnung endet. Mit anderen Worten endet das stabförmige Zuführungselement in der Mitte der Vormischkammer, so dass eine richtungsgebundene Anbringung einer Abgabeöffnung für die zweite Komponente nicht benötigt wird.Furthermore, it can be provided that the rod-shaped feed element ends at the discharge opening. In other words, the rod-shaped feed element ends in the middle of the premixing chamber, so that a directional attachment of a discharge opening for the second component is not needed.

In einer vorteilhaften Weiterbildung kann jedoch auch vorgesehen sein, dass das stabförmige Zuführungselement sich quer durch den gesamten Kammerquerschnitt erstreckt. Hierdurch wird der ersten Komponente ein quer durch den Kammerquerschnitt gleich großer Strömungswiderstand entgegengestellt, so dass die Einbettung der zweiten Komponente noch präziser in der Mitte der ersten Komponente erfolgen kann.In an advantageous development, however, it can also be provided that the rod-shaped feed element extends transversely through the entire chamber cross-section. As a result, the first component is a transversely through the Chamber cross-section equal flow resistance opposed, so that the embedding of the second component can be made even more precise in the middle of the first component.

Dabei kann weiter vorgesehen sein, dass das stabförmige Zuführungselement auf der der ersten Bohrung gegenüberliegenden Seite der Vormischkammer in einer zweiten Bohrung abgestützt ist. Dadurch werden Verformungen des stabförmigen Zuführungselements aufgrund des von der ersten Komponente auf das Zuführungselement ausgeübten Kraft sicher abgeleitet. In diesem Fall bedarf es der Anbringung einer Abgabeöffnung an dem stabförmigen Zuführungselement an einer Stelle, die sich im montierten Zustand in der Mitte der Vormischkammer befindet. Die zweite Bohrung kann vorteilhaft als Sacklochbohrung ausgeführt sein, um einen unerwünschten Austritt der ersten Komponente zu verhindern.It can further be provided that the rod-shaped feed element is supported on the opposite side of the first bore of the premixing chamber in a second bore. As a result, deformations of the rod-shaped feed element due to the force exerted by the first component on the feed element force are safely dissipated. In this case, it is necessary to attach a discharge port to the rod-shaped delivery member at a location which is in the center of the premixing chamber when assembled. The second bore can be advantageously designed as a blind hole to prevent unwanted leakage of the first component.

Insbesondere im zuletzt beschriebenen Fall, dass das stabförmige Zuführungselement sich quer durch den gesamten Kammerquerschnitt erstreckt und die Abgabeöffnung an dem stabförmigen Zuführungselement an einer Stelle, die sich im montierten Zustand in der Mitte der Vormischkammer befindet, ist es vorteilhaft vorzusehen, dass die Abgabeöffnung dem gemeinsamen Ausgang zugewandt ist.In particular, in the case described last, that the rod-shaped feed element extends transversely through the entire chamber cross-section and the discharge opening on the rod-shaped feed element at a location which is in the mounted state in the middle of the premixing chamber, it is advantageous to provide that the discharge opening to the common Exit facing.

Wenn das stabförmige Element jedoch lösbar in einer Bohrung gehalten, beispielsweise in diese eingeschraubt ist, ist von außen schwer feststellbar, ob dies der Fall ist. Deswegen wird weiterhin vorgeschlagen, dass das stabförmige Zuführungselement einen von außerhalb des Vormischkammerelements sichtbaren Richtungsindikator aufweist. Hat das stabförmige Zuführungselement beispielsweise einen INBUS-Schraubenkopf, so könnte an dessen Oberseite eine Kerbe angebracht sein, die die Orientierung der Abgabeöffnung am stabförmigen Zuführungselement anzeigt. Das stabförmige Zuführungselement könnte dann beim Einschrauben in das Vormischkammerelement so ausgerichtet werden, dass die Kerbe zum gemeinsamen Ausgang der Vormischkammer ausgerichtet ist.However, if the rod-shaped element is releasably held in a bore, for example screwed into this, it is difficult to determine from the outside if this is the case. Therefore, it is further proposed that the rod-shaped feed element has a visible from outside of the premixing chamber element direction indicator. For example, if the rod-shaped feed element has an INBUS screw head, a notch may be provided on its upper side indicating the orientation of the discharge opening on the rod-shaped feed element. The rod-shaped feed element could then be aligned when screwed into the premixing chamber member so that the notch is aligned with the common outlet of the premixing chamber.

Um das werkzeuglose Einschrauben des stabförmigen Zuführungselements in das Vormischkammerelement zu erleichtern, kann beispielsweise vorgesehen sein, dass das stabförmige Zuführungselement an mindestens einem seiner Enden aus dem Vormischkammerelement ragt und an diesem Ende einen Knebel aufweist.In order to facilitate the tool-free screwing of the rod-shaped feed element into the premixing chamber element, it can be provided, for example, that the rod-shaped feed element protrudes from the premixing chamber element at at least one of its ends and has a toggle at this end.

Besonders vorteilhaft können die beiden letztgenannten Merkmale so miteinander kombiniert werden, dass der Knebel der Richtungsindikator ist, d.h. der Knebel die Abgaberichtung der Abgabeöffnung anzeigt. Das stabförmige Zuführungselement könnte dann beim Einschrauben in das Vormischkammerelement so ausgerichtet werden, dass der Knebel zum gemeinsamen Ausgang der Vormischkammer ausgerichtet ist.Particularly advantageously, the two latter features can be combined with each other so that the toggle is the direction indicator, i. the toggle indicates the dispensing direction of the dispensing opening. The rod-shaped delivery member could then be aligned upon screwing into the premixing chamber member so that the toggle is aligned with the common exit of the premixing chamber.

Gemäß einer weiteren Ausgestaltung kann vorgesehen sein, dass das Vormischkammerelement im Bereich des gemeinsamen Ausgangs ein Außengewinde in Form eines Rundgewindes, Flachgewindes oder Trapezgewindes aufweist. An diesem Gewinde kann in an sich bekannter Weise der statische Mischer angebracht werden. Da die statischen Mischer üblicherweise Einwegprodukte sind, nach jedem Gebrauch mit den entleerten Behältern entsorgt werden, muss das dafür vorgesehene Gewinde am Vormischkammerelement viele Schraubvorgänge ertragen, ohne übermäßig zu verschleißen. Außerdem muss das Gewinde gereinigt werden, damit Klebstoffreste es nicht mit der Zeit unbrauchbar machen. Beide Anforderungen werden durch die vorgeschlagenen Gewindearten hervorragend unterstützt.According to a further embodiment, it can be provided that the premixing chamber element has an external thread in the form of a round thread, flat thread or trapezoidal thread in the region of the common outlet. At this thread, the static mixer can be mounted in a conventional manner. Since the static mixers are usually disposable, disposed of with the empty containers after each use, the thread provided on the premixing chamber member must endure many screwing operations without excessive wear. In addition, the thread needs to be cleaned so adhesive residues will not render it unusable over time. Both requirements are well supported by the proposed thread types.

Nachfolgend wird die Erfindung anhand von Ausführungsbeispielen und zugehörigen Zeichnungen näher erläutert. Dabei zeigen

  • Fig. 1 eine Klebstoffpistole für zweikomponentige Klebstoffe mit einem wiederverwendbaren Vormischkammerelement,
  • Fig. 2 das vorgeschlagene Funktionsprinzip der zentrischen Mischung,
  • Fig. 3 bis 5 ein erstes Ausführungsbeispiel eines erfindungsgemäßen Vormischkammerelements,
  • Fig. 6 und 7 ein zweites Ausführungsbeispiel eines erfindungsgemäßen Vormischkammerelements,
  • Fig. 8 und 9 ein drittes Ausführungsbeispiel eines erfindungsgemäßen Vormischkammerelements, und
  • Fig. 10 und 11 ein viertes Ausführungsbeispiel eines erfindungsgemäßen Vormischkammerelements.
The invention will be described in more detail below on the basis of exemplary embodiments and associated drawings explained. Show
  • Fig. 1 a glue gun for two-component adhesives with a reusable premixing chamber element,
  • Fig. 2 the proposed functional principle of the centric mixture,
  • Fig. 3 to 5 A first embodiment of a premixing chamber element according to the invention,
  • 6 and 7 A second embodiment of a premixing chamber element according to the invention,
  • 8 and 9 a third embodiment of a Vormischkammerelements invention, and
  • 10 and 11 A fourth embodiment of a premixing chamber element according to the invention.

Fig. 1 zeigt in einer Seitenansicht eine Austragvorrichtung 1 in Form einer Klebstoffpistole, bei der eine erste Komponente und eine zweite Komponente in einem Vormischkammerelement 9 der Austragvorrichtung 1 miteinander vermengt und anschließend durch einen an dem Vormischkammerelement 9 der Austragvorrichtung 1 auswechselbar angebrachten statischen Mischer 6 ausgetragen werden. Die erste Komponente wird in einem ersten Behälter 7 in Form eines Schlauchbeutels bereitgestellt, der in eine rohrförmige Hülse eingelegt wird, die ihrerseits an einem ersten Eingang 11 des Vormischkammerelements 9 angebracht wird. Die zweite Komponente wird in einem zweiten Behälter 8 in Form eines Plastikröhrchens bereitgestellt, das an einem zweiten Eingang 12 des Vormischkammerelements 9 angebracht wird. Fig. 1 shows a side view of a discharge device 1 in the form of an adhesive gun, in which a first component and a second component in a premixing chamber element 9 of the discharge device 1 are mixed together and then discharged through a static mixer 6 replaceably mounted on the premixing chamber element 9 of the discharge device 1. The first component is provided in a first container 7 in the form of a tubular bag which is inserted into a tubular sleeve, which in turn is attached to a first inlet 11 of the premixing chamber element 9. The second component is provided in a second container 8 in the form of a plastic tube attached to a second inlet 12 of the premixing chamber element 9.

Die Austragvorrichtung 1 weist außerdem eine auf beide Behälter 7, 8 gleichzeitig wirkende, pneumatisch angetriebene Ausdrückeinrichtung 2 auf, an der das Vormischkammerelement 9 mittels Distanzstäben in einer solchen Entfernung angebracht ist, dass die Behälter 7, 8 zwischen der Ausdrückeinrichtung 2 und dem Vormischkammerelement 9 aufgenommen werden können. Zur Handhabung der Austragvorrichtung 1 weist diese außerdem einen Griff 3 mit einem Betätigungselement 4 für die Ausdrückeinrichtung 2 auf, durch welches die Ausdrückeinrichtung 2 mit Druckluft beaufschlagt wird, die der Austragvorrichtung 1 am Ende des Griffs 3 über einen Druckluftanschluss 5 zugeführt wird.The discharge device 1 also has a pneumatically acting on both containers 7, 8 simultaneously driven squeezing device 2, to which the premixing chamber element 9 is attached by means of spacer rods at a distance such that the containers 7, 8 can be received between the squeezing device 2 and the premixing chamber element 9. For handling the discharge device 1, this also has a handle 3 with an actuating element 4 for the squeezing device 2, through which the squeezing device 2 is acted upon by compressed air which is supplied to the discharge device 1 at the end of the handle 3 via a compressed air connection 5.

Fig. 2 zeigt, wie die zweite Komponente der ersten Komponente in einer erfindungsgemäßen Vormischkammer 10 zentrisch zugeführt wird. Dabei werden die Ströme der beiden Komponenten von den beiden Eingängen 11, 12 zu dem gemeinsamen Ausgang 13 durch Strömungslinien dargestellt. Es ist zu erkennen, dass die zweite Komponente durch ein stabförmiges Zuführungselement 18, das den Zuführungskanal 15 aufweist, der Vormischkammer 10 radial zugeführt und aus einer zentral angeordneten Abgabeöffnung 17 mittig in den Strom der ersten Komponente abgegeben wird. Fig. 2 shows how the second component of the first component in a premixing chamber 10 according to the invention is fed centrally. The currents of the two components from the two inputs 11, 12 are shown to the common output 13 by flow lines. It will be appreciated that the second component is radially supplied to the premixing chamber 10 through a rod-shaped delivery member 18 having the delivery channel 15 and delivered centrally from a centrally located delivery port 17 into the flow of the first component.

Die Fig. 3 bis 5 zeigen ein erstes Ausführungsbeispiel eines Vormischkammerelements 9, mit dem das erfindungsgemäße Funktionsprinzip der zentrischen Mischung realisiert wird.The Fig. 3 to 5 show a first embodiment of a premixing chamber element 9, with which the functional principle of the centric mixture according to the invention is realized.

Das Vormischkammerelement 9 weist eine darin angeordnete Vormischkammer 10 auf. Das Vormischkammerelement 9 weist zwei Eingänge 11, 12 auf, durch die der Vormischkammer 10 jeweils eine Komponente zugeführt wird. Während der erste Eingang 11 für die erste Komponente koaxial zur Vormischkammer 10 angeordnet ist, ist der zweite Eingang 12 für die zweite Komponente seitlich daneben angeordnet.The premixing chamber element 9 has a premixing chamber 10 arranged therein. The premixing chamber element 9 has two inlets 11, 12 through which a component is supplied to the premixing chamber 10. While the first input 11 for the first component is coaxial with the premixing chamber 10, the second input 12 for the second component is disposed laterally adjacent thereto.

Ein Zuführungskanal 15 für die zweite Komponente erstreckt sich rechtwinklig zur Längsachse in die Vormischkammer 10 hinein. Der Zuführungskanal 15 ist als achsparallele Bohrung in einem stabförmigen Zuführungselement 18 ausgebildet, das in einer ersten Bohrung 19 des Vormischkammerelements 9 mittels Gewinde 21 lösbar befestigt ist. Das stabförmige Zuführungselement 18 erstreckt sich quer durch den gesamten Kammerquerschnitt.A feed channel 15 for the second component extends at right angles to the longitudinal axis into the premixing chamber 10 into it. The feed channel 15 is formed as an axially parallel bore in a rod-shaped feed element 18 which is releasably secured in a first bore 19 of the premixing chamber element 9 by means of thread 21. The rod-shaped feed element 18 extends transversely through the entire chamber cross-section.

Die erste Bohrung 19 ist im Vormischkammerelement 9 einseitig von außen als Durchgangsbohrung bis in die Vormischkammer 10 geführt, in der das stabförmige Zuführungselement 18 angeordnet und mittels Gewinde 21 fixiert ist. Diese erste Bohrung 19 ist von der Seite des ersten Eingangs 11 für die erste Komponente her zur Vormischkammer 10 geführt, von wo aus auch das stabförmige Zuführungselement 18 in die erste Bohrung 19 eingeführt und darin verschraubt ist. Das stabförmige Zuführungselement 18 ist außerdem auf der der ersten Bohrung 19 gegenüberliegenden Seite der Vormischkammer 10 in einer zweiten Bohrung 20 abgestützt, die als Sacklochbohrung ausgeführt ist. Diese zweite Bohrung 20 reicht bis in den zweiten Eingang 12 für die zweite Komponente hinein, und das stabförmige Zuführungselement 18 ist an diesem Ende offen, d.h. es bildet an seinem Ende eine Eintrittsöffnung 16, durch die die zweite Komponente in das stabförmige Zuführungselement 18 und damit in den Zuführungskanal 15 eintreten kann.The first bore 19 is guided unilaterally in the premixing chamber element 9 from the outside as a through-bore into the premixing chamber 10, in which the rod-shaped feed element 18 is arranged and fixed by means of thread 21. This first bore 19 is guided from the side of the first input 11 for the first component ago to the premixing chamber 10, from where also the rod-shaped feed element 18 is inserted into the first bore 19 and screwed therein. The rod-shaped feed element 18 is also supported on the opposite side of the first bore 19 of the premixing chamber 10 in a second bore 20 which is designed as a blind hole. This second bore 20 extends into the second input 12 for the second component, and the rod-shaped delivery member 18 is open at that end, i. it forms at its end an inlet opening 16, through which the second component can enter into the rod-shaped feed element 18 and thus into the feed channel 15.

Die an dem stabförmigen Zuführungselement 18 bezüglich der Vormischkammer 10 mittig angeordnete Abgabeöffnung 17, die das Ende des Zuführungskanals 15 bildet, ist seitlich an dem stabförmigen Zuführungselement 18 angeordnet und dem gemeinsamen Ausgang 13 der Vormischkammer 10 zugewandt.The discharge opening 17 centrally disposed on the rod-shaped feed element 18 with respect to the premixing chamber 10, which forms the end of the feed channel 15, is arranged laterally on the rod-shaped feed element 18 and faces the common outlet 13 of the premixing chamber 10.

Das stabförmige Zuführungselement 18 ragt mit einem seiner Enden an der Seite des ersten Eingangs 11 für die erste Komponente aus dem Vormischkammerelement 9. An diesem Ende des stabförmigen Zuführungselements 18 ist ein Knebel für die werkzeuglose Montage des stabförmigen Zuführungselements 18 angeordnet, der gleichzeitig als ein von außerhalb des Vormischkammerelements 9 sichtbarer Richtungsindikator 22 dient, denn der Knebel und die Abgabeöffnung 17 des stabförmigen Zuführungselements 18 weisen beide in dieselbe Richtung.The rod-shaped feed member 18 protrudes with one of its ends on the side of the first input 11 for the first component from the premixing chamber element 9. At this end of the rod-shaped feed element 18 is a gag for the tool-less mounting of the rod-shaped feed element 18 is arranged, which serves as a visible from outside of the premixing chamber element 9 direction indicator 22, because the toggle and the discharge opening 17 of the rod-shaped feed element 18 are both in the same direction.

Das Vormischkammerelement 9 weist im Bereich des gemeinsamen Ausgangs 13 ein Außengewinde 14 in Form eines Trapezgewindes auf, das der lösbaren Anbringung eines statischen Mischers 6 dient und das verschleißarm und leicht zu reinigen ist.The premixing chamber element 9 has, in the region of the common outlet 13, an external thread 14 in the form of a trapezoidal thread, which serves for the releasable attachment of a static mixer 6 and which is wear-resistant and easy to clean.

Die Fig. 6 und 7 zeigen ein zweites Ausführungsbeispiel eines Vormischkammerelements 9, mit dem das erfindungsgemäße Funktionsprinzip der zentrischen Mischung realisiert wird.The 6 and 7 show a second embodiment of a premixing chamber element 9, with which the functional principle of the centric mixture according to the invention is realized.

Dieses zweite Ausführungsbeispiel unterscheidet sich von dem ersten Ausführungsbeispiel dadurch, dass die erste Bohrung 19 von der Seite des zweiten Eingangs 12 für die zweite Komponente her zur Vormischkammer 10 geführt ist, von wo aus auch das stabförmige Zuführungselement 18 in die erste Bohrung 19 eingeführt und darin verschraubt ist. Die erste Bohrung 19 führt dabei durch den zweiten Eingang 12 für die zweite Komponente hindurch, und das stabförmige Zuführungselement 18 hat an dieser Stelle eine seitliche Eintrittsöffnung 16, so dass die zweite Komponente in das stabförmige Zuführungselement 18 und damit in den Zuführungskanal 15 eintreten kann.This second embodiment differs from the first embodiment in that the first bore 19 is guided from the side of the second input 12 for the second component ago to the premixing chamber 10, from where also the rod-shaped feed element 18 is inserted into the first bore 19 and therein is screwed. The first bore 19 leads through the second input 12 for the second component, and the rod-shaped feed element 18 has at this point a lateral inlet opening 16, so that the second component can enter the rod-shaped feed element 18 and thus into the feed channel 15.

Die an dem stabförmigen Zuführungselement 18 bezüglich der Vormischkammer 10 mittig angeordnete Abgabeöffnung 17, die das Ende des Zuführungskanals 15 bildet, ist zentral an dem stabförmigen Zuführungselement 18 angeordnet. Sie bildet den Abschluss des stabförmigen Zuführungselements 18, das in diesem Ausführungsbeispiel nicht auf der gegenüberliegenden Seite der Vormischkammer 10 abgestützt ist.The discharge opening 17, which is arranged centrally on the rod-shaped feed element 18 with respect to the premixing chamber 10 and forms the end of the feed channel 15, is arranged centrally on the rod-shaped feed element 18. It forms the end of the rod-shaped feed element 18, which is not supported on the opposite side of the premixing chamber 10 in this embodiment.

Die Fig. 8 und 9 zeigen ein drittes Ausführungsbeispiel eines Vormischkammerelements 9, mit dem das erfindungsgemäße Funktionsprinzip der zentrischen Mischung realisiert wird.The 8 and 9 show a third embodiment of a premixing chamber element 9, with which the functional principle of the centric mixture according to the invention is realized.

Dieses dritte Ausführungsbeispiel unterscheidet sich von dem zweiten Ausführungsbeispiel dadurch, dass das stabförmige Zuführungselement 18 ähnlich wie im ersten Ausführungsbeispiel auf der der ersten Bohrung 19 gegenüberliegenden Seite der Vormischkammer 10 in einer zweiten Bohrung 20 abgestützt ist, die als Sacklochbohrung ausgeführt ist, wobei die bezüglich der Vormischkammer 10 mittig angeordnete Abgabeöffnung 17, die das Ende des Zuführungskanals 15 bildet, seitlich an dem stabförmigen Zuführungselement 18 angeordnet und dem gemeinsamen Ausgang 13 der Vormischkammer 10 zugewandt ist.This third embodiment differs from the second embodiment in that the rod-shaped feed element 18 is similarly supported in the first embodiment on the opposite side of the first bore 19 Vormischkammer 10 in a second bore 20, which is designed as a blind bore, wherein respect to the Premixing chamber 10 centrally disposed discharge opening 17, which forms the end of the feed channel 15, arranged laterally on the rod-shaped feed element 18 and the common output 13 of the premixing chamber 10 faces.

Die Fig. 10 und 11 zeigen ein viertes Ausführungsbeispiel eines Vormischkammerelements 9, mit dem das erfindungsgemäße Funktionsprinzip der zentrischen Mischung realisiert wird.The 10 and 11 show a fourth embodiment of a premixing chamber element 9, with which the functional principle of the centric mixture according to the invention is realized.

Dieses vierte Ausführungsbeispiel unterscheidet sich von den anderen Ausführungsbeispielen dadurch, dass das Vormischkammerelement 9 einen Grundkörper 9a und einen im Grundkörper 9a auswechselbar angeordneten Einsatz 9b umfasst, der die Vormischkammer 10 begrenzt. Der Einsatz 9b erstreckt sich vom ersten Eingang 11, an dem ein Behälter für eine erste pastöse Masse angebracht werden kann, bis zum gemeinsamen Ausgang 13, so dass der Grundkörper 9a mit den pastösen Massen nicht in Berührung kommen kann.This fourth exemplary embodiment differs from the other exemplary embodiments in that the premixing chamber element 9 comprises a main body 9a and an insert 9b, which is interchangeable in the main body 9a and delimits the premixing chamber 10. The insert 9b extends from the first inlet 11, to which a container for a first pasty mass can be attached, to the common outlet 13, so that the base body 9a can not come into contact with the pasty masses.

Das Vormischkammerelement 9 weist Verdrehsicherungsmittel in Form einer Vertiefung 9c im Grundkörper 9a und eines mit der Vertiefung 9c korrespondierenden Vorsprungs 9d des Einsatzes 9b auf, die so zusammenwirken, dass sie einen lagerichtigen Einbau des Einsatzes 9b im Grundkörper 9a erzwingen und einer Relativverdrehung zwischen Grundkörper 9a und Einsatz 9b entgegenwirken.The premixing chamber element 9 has anti-rotation means in the form of a recess 9c in the base body 9a and a projection 9d of the insert 9b corresponding to the recess 9c, which cooperate so as to force a correct installation of the insert 9b in the base body 9a and a relative rotation between the base body 9a and Counteract insert 9b.

Ein Verschiebesicherungsmittel in Form einer Schraube 9e, die den Einsatz 9b im Grundkörper 9a festklemmt, verhindert eine Relativverschiebung zwischen Grundkörper 9a und Einsatz 9b und somit auch das unbeabsichtigte Herausfallen des Einsatzes 9b aus dem Grundkörper 9a.A displacement securing means in the form of a screw 9e, which clamps the insert 9b in the base body 9a, prevents a relative displacement between the base body 9a and insert 9b and thus also the unintentional falling out of the insert 9b from the base body 9a.

Quer durch die Vormischkammer 10 erstreckt sich das stabförmige Zuführungselement 18, das einstückiger Bestandteil des Einsatzes 9b ist und nach Gebrauch mit diesem entsorgt wird.Across the premixing chamber 10 extends the rod-shaped feed element 18, which is an integral part of the insert 9b and is disposed of with it after use.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Austragvorrichtungdischarge
22
Ausdrückeinrichtungpush out
33
GriffHandle
44
Betätigungselementactuator
55
DruckluftanschlussCompressed air connection
66
statischer Mischerstatic mixer
77
erster Behälterfirst container
88th
zweiter Behältersecond container
99
VormischkammerelementVormischkammerelement
9a9a
Grundkörperbody
9b9b
Einsatzcommitment
9c9c
Verdrehsicherungsmittel (Vertiefung)Anti-rotation device (recess)
9d9d
Verdrehsicherungsmittel (Vorsprung)Anti-rotation device (projection)
9e9e
Verschiebesicherungsmittel (Schraube)Anti-slip device (screw)
1010
Vormischkammerpremix
1111
erster Eingangfirst entrance
1212
zweiter Eingangsecond entrance
1313
gemeinsamer Ausgangcommon output
1414
Außengewindeexternal thread
1515
Zuführungskanalfeed channel
1616
Eintrittsöffnunginlet opening
1717
Abgabeöffnungdischarge opening
1818
stabförmiges Zuführungselementrod-shaped feed element
1919
erste Bohrungfirst hole
2020
zweite Bohrungsecond hole
2121
Gewindethread
2222
Richtungsindikatordirection indicator

Claims (17)

  1. Discharge apparatus for bringing together at least two pasty masses, comprising
    receptacles for at least two exchangeable containers (7, 8),
    at least one pushing-out device which acts on the containers (7, 8), and
    a premixing chamber element (9) which is able to be connected directly to the containers (7, 8) and which has a premixing chamber (10), said premixing chamber having a longitudinal axis and a chamber cross section, having a first inlet (11) for a first pasty mass, having at least one second inlet (12) for a second pasty mass, which is adjoined by a feed channel (15) with a delivery opening (17) which opens centrally in the chamber cross section, and having a common outlet (13) for a mixture of the pasty masses, to which a static mixer (6) is able to be attached,
    wherein that channel section of the feed channel (15) on which the delivery opening is arranged extends into the premixing chamber (10) at right angles to the longitudinal axis.
  2. Discharge apparatus according to Claim 1, characterized in that the premixing chamber element (9) comprises a main body (9a) and an insert (9b) which is arranged exchangeably in the main body (9a) and which delimits the premixing chamber (10).
  3. Discharge apparatus according to Claim 2, characterized in that the insert (9b) extends from the first inlet (11) to the common outlet (13).
  4. Discharge apparatus according to Claim 2 or 3, characterized in that the premixing chamber element (9) has rotation prevention means (9c, 9d) for preventing a relative rotation between the main body (9a) and the insert (9b).
  5. Discharge apparatus according to one of Claims 2 to 4, characterized in that the premixing chamber element (9) has displacement prevention means (9e) for preventing a relative displacement between the main body (9a) and the insert (9b).
  6. Discharge apparatus according to one of Claims 1 to 5, characterized in that the feed channel (15) is formed in a bar-shaped feed element (18).
  7. Discharge apparatus according to Claim 6, characterized in that the bar-shaped feed element (18) is a constituent part of the insert (9b).
  8. Discharge apparatus according to Claim 6, characterized in that the bar-shaped feed element (18) is fastened detachably in a first bore (19) of the premixing chamber element (9).
  9. Discharge apparatus according to Claim 8, characterized in that the first bore (19) in the premixing chamber element (9) is led as a through bore into the premixing chamber (10) from the outside on one side.
  10. Discharge apparatus according to one of Claims 6 to 9, characterized in that the bar-shaped feed element (18) ends at the delivery opening (17).
  11. Discharge apparatus according to one of Claims 6 to 10, characterized in that the bar-shaped feed element (18) extends transversely through the entire chamber cross section.
  12. Discharge apparatus according to one of Claims 8 to 11, characterized in that the bar-shaped feed element (18) is supported in a second bore (20) on that side of the premixing chamber (10) which is opposite the first bore (19).
  13. Discharge apparatus according to Claim 12, characterized in that the second bore (20) is in the form of a blind bore.
  14. Discharge apparatus according to one of Claims 1 to 13, characterized in that the delivery opening (17) faces the common outlet (13).
  15. Discharge apparatus according to one of Claims 6 to 14, characterized in that the bar-shaped feed element (18) has a direction indicator (22) which is visible from outside the premixing chamber element (9).
  16. Discharge apparatus according to one of Claims 6 to 15, characterized in that the bar-shaped feed element (18) projects from the premixing chamber element (9) at at least one of its ends and has a toggle at this end.
  17. Discharge apparatus according to Claims 15 and 16, characterized in that the toggle is the direction indicator (22).
EP16163750.9A 2015-04-02 2016-04-04 Application device for paste masses Active EP3095528B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015105186.9A DE102015105186A1 (en) 2015-04-02 2015-04-02 Discharge device for pasty masses

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EP3095528A3 EP3095528A3 (en) 2017-02-22
EP3095528B1 true EP3095528B1 (en) 2019-07-10

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Publication number Publication date
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EP3095528A3 (en) 2017-02-22
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