EP2036833A2 - Self-closing dispensing head - Google Patents

Self-closing dispensing head Download PDF

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Publication number
EP2036833A2
EP2036833A2 EP08016191A EP08016191A EP2036833A2 EP 2036833 A2 EP2036833 A2 EP 2036833A2 EP 08016191 A EP08016191 A EP 08016191A EP 08016191 A EP08016191 A EP 08016191A EP 2036833 A2 EP2036833 A2 EP 2036833A2
Authority
EP
European Patent Office
Prior art keywords
closing
opening
piston
dispensing
closing piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08016191A
Other languages
German (de)
French (fr)
Other versions
EP2036833B1 (en
EP2036833A3 (en
Inventor
Matthias Dr. Prox
Peter Menzel
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.)
COSMED GMBH & CO KG
Original Assignee
FENNEL COSMED GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by FENNEL COSMED GmbH and Co KG filed Critical FENNEL COSMED GmbH and Co KG
Priority to PL08016191T priority Critical patent/PL2036833T3/en
Publication of EP2036833A2 publication Critical patent/EP2036833A2/en
Publication of EP2036833A3 publication Critical patent/EP2036833A3/en
Application granted granted Critical
Publication of EP2036833B1 publication Critical patent/EP2036833B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/34—Cleaning or preventing clogging of the discharge passage
    • B65D83/345—Anti-clogging means for outlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/16—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means
    • B65D83/20—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means operated by manual action, e.g. button-type actuator or actuator caps
    • B65D83/205—Actuator caps, or peripheral actuator skirts, attachable to the aerosol container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/16—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means
    • B65D83/20—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means operated by manual action, e.g. button-type actuator or actuator caps
    • B65D83/205—Actuator caps, or peripheral actuator skirts, attachable to the aerosol container
    • B65D83/206—Actuator caps, or peripheral actuator skirts, attachable to the aerosol container comprising a cantilevered actuator element, e.g. a lever pivoting about a living hinge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1052—Actuation means
    • B05B11/1053—Actuation means combined with means, other than pressure, for automatically opening a valve during actuation; combined with means for automatically removing closures or covers from the discharge nozzle during actuation

Definitions

  • the invention relates to a self-closing dispensing head for a pressure vessel with a dispensing valve for dispensing media, in particular viscose, self-foaming and / or gel-like products, wherein the dispensing head a closable by a closing element discharge opening, an opening mechanism through which in the assembled state, the dispensing valve of Pressure vessel can be opened, and having an opening into the discharge port channel for the medium, wherein the channel has at least a first channel portion and a second channel portion and wherein actuated by pressure on an actuating element both the opening mechanism and designed as a movable closing piston closing element and the second channel portion relative to each other are moved so that the closing element is moved out with the release of a discharge opening from the discharge opening.
  • Pressure vessels with dispensing heads for eg shaving foams and gels of conventional design usually have a non-closable dispensing opening, so that it After use often comes to the fact that in spite of no longer activated actuators, the medium nachlaufs or nachCumt, resulting in unsightly residues in the output port, which dry out and contaminate the newly applied, fresh medium when reused. In addition, the discharge opening is often clogged due to dried and clumped residual medium.
  • a dispensing head for a medium in which the closing element is elastic.
  • An actuator acts in a shaft-like area in front of the dispensing head of the closing element on this and can trigger a deflection of this shaft when actuated with the consequence that the dispensing head can be moved into the housing interior to release a dispensing opening.
  • the closing element is moved back into the dispensing opening with the consequence that still adhering medium residues are pressed into the dispensing opening and clog these or NachSumen is unavoidable.
  • the self-closing dispensing head for a pressure vessel of the type mentioned is characterized in that the closing element is designed as a movable closing piston with on its piston skirt surface at a distance provided and movable with the closing piston Zentrieran arrangementsn, wherein between individual Zentrieran arrangementsn flow-through are provided for the medium, which is provided on the side facing away from the dispensing opening end face of the closing piston, an elastic spring portion which is bounded at the end by a headpiece associated with the actuating element, wherein the head piece has a rounded cross-sectional configuration and the actuating element during the opening and closing movement of the closing piston on the rounded head piece slides in the open or closed position, wherein the rounding of the head piece is adapted to the movement path of the actuating element.
  • a self-closing dispensing head is created for a pressure vessel, with the very clean a medium and not, as conventionally rather spiral, but is straight forward.
  • This is due in particular to the fact that due to the provided centering projections, which are supported in the second channel portion on the inner surfaces during the entire movement of the closing piston both during transfer to its open position and during transfer to its closed position, relative positional deviations of the closing piston relative to housing parts safely avoided are, which means that over the prior art, no position inaccuracies during the closing process in the region of the outlet opening occur, so that the closing piston can be reproduced and accurately translated into its open and closed position.
  • the centering lugs are preferably distributed over a peripheral portion evenly distributed on the closing piston. It has been found that e.g. four centering approaches, which are evenly distributed over the circumference, allow a positionally accurate movement and centering of the closing piston. It must be ensured that during the entire closing movement no tilting moments are possible over the length of the closing piston, so that the centering elements on the closing piston extend near its front end.
  • the front end can also have a cross-sectional widening, which extends over the circumference of the closing piston, so that it has an enlarged peripheral portion there, on which the centering elements are arranged. This also leads to an increase in the flow rate of the medium to be dispensed there.
  • a sealing element molded, preferably via an inner central supply channel within the closing piston and perpendicular thereto, in the lateral surface of the closing piston opening feed lines.
  • a sealing material consists for example of a plastic soft material such as TPE, silicone.
  • the closing piston can eg consist of ABS, PP or POM material, in each case plastic hard materials.
  • the second channel portion has a valve seat into which the closing piston with the sealing element in its closed position is to be completely introduced.
  • a position is assumed, wherein an upper area of the output-side end of the closing piston is arranged at a distance from the dispensing opening end, but otherwise also no longer projects beyond the housing of the dispensing head in the region of the dispensing opening.
  • the closing piston assumes a position in the valve seat that its front end is flush with the outer surface of the housing, so that product residues can be easily removed. This can very clean there still adhering material on the seal and the valve seat are returned to the side channel section.
  • the dispensing head which is preferably formed integrally with the pressure vessel, not shown.
  • This has a housing 2 and a not shown discharge valve for dispensing media, such as viscous, self-foaming and / or gel-like products.
  • This dispensing valve is associated with the inner container space in which the medium is filled, and can be operated by an opening mechanism.
  • the dispensing head has a dispensing opening in fluid communication with a first channel section 4 and a second channel section 5.
  • the second channel portion is associated with the locking element designed as a closing piston, which controls the discharge opening 3.
  • This closing piston is arranged relatively movably within the channel section 5, so that it moves out of its closed position (FIG. Fig. 1 ) in its open position ( Fig. 2 ) can be moved.
  • an actuating element 7 is provided, which from its rest position ( Fig. 1 ) Can be pressed into the operating position and thus can be pivoted. This actuator 7 simultaneously actuates the opening mechanism with which the dispensing valve can be opened.
  • 6.1 centering 6.2 are formed in the front region of the closing piston 6 at a portion 6.1, which are supported on the inner circumferential surfaces of the second channel section 5 in the housing.
  • a total of four centering 6.2 are distributed evenly distributed over the circumference.
  • a valve seat 3.1 is formed in the housing. This valve seat is associated with the front region of the closing piston 6, which is provided with a molded plastic soft material seal 8.
  • the front head section 6.4 of the closing piston 6 has a congruent design following the conical shape of the valve seat and is to be completely introduced into the valve seat, as shown in more detail Fig. 3 shows. It takes in the Fig. 3 apparent upper part a distance from the outlet opening 3 (the front end) a. Nevertheless, he is a total of sunk arranged in the closed state, so that any remaining amounts of the spent medium are wiped with a finger prick and then with a simple flushing and the still accessible from the outside of the valve seat is rinse. This reliably avoids that residual quantities which can dry out and agglomerate remain in the area of the outlet opening 3.
  • By the return movement of the closing piston out of his Fig. 4 apparent opening position in the closed position in Fig. 3 causes residual amounts remaining to be returned to the inner channel section 5.
  • the discharge opening 3 facing away from the end of the closing piston has a spring element 9 made of a plastic soft material, which is provided to the actuating element 7 out with a head 10, which has a rounded sliding surface 10.1.
  • the spring element 9 is at the same time a sealing element, so that the product mass can not leave the container there either.
  • the actuating element has a correspondingly congruent contact surface 7.1, which slides along this surface 10.1 in the course of the actuation, that is to say depression of the actuating element 7. Due to the rounding there are only relatively low frictional forces, which also means that no tilting moments are transmitted to the closing piston as in the prior art.
  • the desired near-horizontal position of the closing piston can be realized, although it is acted perpendicular to the actuating element. Due to the low frictional forces, the reduced tilting moments and the provided centering approaches 6.2 the closing piston is very precise position in the respective open or closed position to transfer, which leads to an optimized sealing behavior and taking the closed position with superimposed return of the medium.
  • Fig. 8 is the inner channel 6.5 can be seen in the transverse channels 6.6 for molding the seal 8 and the spring element 9 open.

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

The head (1) has a locking element formed as a movable piston (6) with centering shoulders, which are movable with the piston and provided on a piston lateral surface. A set of flow through areas is provided between the shoulders. An elastic spring region is provided at a front end of the piston, where the end is turned away with a feed inlet (3). A head piece has round cross-section, and an actuator (7) slides into opening and/or closing position during opening and closing movement of the piston at the head piece, where the cross-section of the head piece is adapted to a path of the actuator.

Description

Die Erfindung bezieht sich auf einen selbstschließenden Ausgabekopf für einen Druckbehälter mit einem Abgabeventil zur Abgabe von Medien, insbesondere Viskosen, selbstschäumenden und/oder gelartigen Produkten, wobei der Ausgabekopf eine durch ein Schließelement verschließbare Ausgabeöffnung, einen Öffnungsmechanismus, durch welchen im montierten Zustand das Abgabeventil des Druckbehälters geöffnet werden kann, und einen in die Ausgabeöffnung mündenden Kanal für das Medium aufweist, wobei der Kanal wenigstens einen ersten Kanalabschnitt und einen zweiten Kanalabschnitt aufweist und wobei durch Druck auf ein Betätigungselement sowohl der Öffnungsmechanismus betätigt als auch das als beweglicher Schließkolben ausgebildete Schließelement und der zweite Kanalabschnitt relativ zueinander derart bewegt werden, dass das Schließelement unter Freigabe einer Ausgabeöffnung aus der Ausgabeöffnung herausbewegbar ist.The invention relates to a self-closing dispensing head for a pressure vessel with a dispensing valve for dispensing media, in particular viscose, self-foaming and / or gel-like products, wherein the dispensing head a closable by a closing element discharge opening, an opening mechanism through which in the assembled state, the dispensing valve of Pressure vessel can be opened, and having an opening into the discharge port channel for the medium, wherein the channel has at least a first channel portion and a second channel portion and wherein actuated by pressure on an actuating element both the opening mechanism and designed as a movable closing piston closing element and the second channel portion relative to each other are moved so that the closing element is moved out with the release of a discharge opening from the discharge opening.

Druckbehälter mit Ausgabeköpfen für z.B. Rasierschäume und -gele herkömmlicher Bauart haben üblicherweise eine nicht verschließbare Ausgabeöffnung, so dass es nach Gebrauch vielfach dazu kommt, dass trotz nicht mehr aktivierter Betätigungselemente das Medium nachfließt bzw. nachschäumt, was zu unansehnlichen Restmengen im Bereich der Ausgabeöffnung führt, die austrocknen und bei einem erneuten Gebrauch das neu ausgebrachte, frische Medium verunreinigen. Darüber hinaus ist die Ausgabeöffnung aufgrund von vertrocknetem und verklumptem Restmedium vielfach verstopft.Pressure vessels with dispensing heads for eg shaving foams and gels of conventional design usually have a non-closable dispensing opening, so that it After use often comes to the fact that in spite of no longer activated actuators, the medium nachlaufs or nachschäumt, resulting in unsightly residues in the output port, which dry out and contaminate the newly applied, fresh medium when reused. In addition, the discharge opening is often clogged due to dried and clumped residual medium.

Um diese Nachteile zu vermeiden, ist aus der EP 1 295 812 A1 ein selbstschließender Ausgabekopf für einen Druckbehälter der eingangs genannten Art bekannt, bei dem die Ausgabeöffnung über ein Schließelement geschlossen und geöffnet werden kann. Bei Druck auf ein Betätigungselement werden sowohl der Öffnungsmechanismus betätigt als auch das Schließelement und der zweite Kanalabschnitt relativ zueinander bewegt. Damit wird zum einen das Abgabeventil geöffnet, so dass das unter Druck stehende Medium in den Kanal einströmen kann. Dort kann es allerdings erst über die Ausgabeöffnung austreten, wenn das Schließelement den zweiten Kanalabschnitt freigegeben hat. Durch Federmittel, z.B. durch ein teilweise elastisch verformbar gestaltetes Gehäuse des Ausgabekopfes, können die jeweiligen Elemente mit nachlassendem Druck auf das Betätigungselement wieder in ihre ursprüngliche Lage relativ zueinander und zum Druckbehälter hingebracht werden, so dass sowohl das Abgabeventil als auch die Ausgabeöffnung wieder geschlossen sind. Damit ist einem Nachfließen bzw. Nachschäumen wirksam begegnet.To avoid these disadvantages is out of the EP 1 295 812 A1 a self-closing dispensing head for a pressure vessel of the type mentioned, in which the dispensing opening can be closed and opened via a closing element. When pressure is applied to an actuating element, both the opening mechanism are actuated and the closing element and the second channel section are moved relative to one another. Thus, on the one hand the dispensing valve is opened, so that the pressurized medium can flow into the channel. There, however, it can only exit via the dispensing opening when the closing element has released the second channel section. By spring means, for example by a partially elastically deformable shaped housing of the dispensing head, the respective elements with decreasing pressure on the actuator can be brought back into their original position relative to each other and to the pressure vessel, so that both the dispensing valve and the dispensing opening are closed again. In order for a Nachfließen or Nachschäumen is effectively met.

Nachteilig hierbei ist jedoch, dass im Bereich der Ausgabeöffnung nach wie vor Restmengen des abzugebenden Mediums verbleiben. Des weiteren bereitet das sichere Schließen der Ausgabeöffnung Probleme.The disadvantage here, however, is that residual amounts of the medium to be dispensed remain in the area of the dispensing opening. Furthermore, the safe closing of the delivery port causes problems.

Aus der US 5,205,443 ist ein Ausgabekopf für ein Medium bekannt, bei dem das Schließelement elastisch ausgebildet ist. Ein Betätigungselement wirkt in einem schaftartigen Bereicht vor dem Ausgabekopf des Schließelementes auf dieses ein und kann bei Betätigung eine Durchbiegung dieses Schaftes auslösen mit der Konsequenz, dass das Ausgabekopf in das Gehäuseinnere unter Freigabe einer Ausgabeöffnung bewegt werden kann. Bei einer nachfolgenden Entlastung des Betätigungselementes wird das Schließelement in die Ausgabeöffnung zurückbewegt mit der Konsequenz, dass noch anhaftende Mediumreste in die Ausgabeöffnung gedrückt werden und diese verstopfen bzw. ein Nachschäumen unvermeidbar ist.From the US 5,205,443 For example, a dispensing head for a medium is known in which the closing element is elastic. An actuator acts in a shaft-like area in front of the dispensing head of the closing element on this and can trigger a deflection of this shaft when actuated with the consequence that the dispensing head can be moved into the housing interior to release a dispensing opening. In a subsequent discharge of the actuating element, the closing element is moved back into the dispensing opening with the consequence that still adhering medium residues are pressed into the dispensing opening and clog these or Nachschäumen is unavoidable.

Demzufolge ist es Aufgabe der vorliegenden Erfindung, einen selbstschließenden Ausgabekopf für einen Druckbehälter der eingangs genannten Art derart weiterzubilden, dass verbleibende Restmengen des abzugebenden Materials wirksam zu vermeiden und die Ausgabeöffnung sicher zu verschließen sind.Accordingly, it is an object of the present invention to develop a self-closing dispensing head for a pressure vessel of the type mentioned in such a way that remaining amounts of the material to be dispensed effectively to avoid and to close the discharge opening safely.

Zur Lösung dieser Aufgabe zeichnet sich der selbstschließende Ausgabekopf für einen Druckbehälter der eingangs genannten Art dadurch aus, dass das Schließelement als beweglicher Schließkolben mit auf seiner Kolbenmantelfläche mit Abstand zueinander vorgesehenen und mit dem Schließkolben bewegbaren Zentrieransätzen ausgebildet ist, wobei zwischen einzelnen Zentrieransätzen Durchströmräume für das Medium vorgesehen sind, das an dem mit der Ausgabeöffnung abgewandten Stirnende des Schließkolbens ein elastischer Federbereich vorgesehen ist, der endseitig von einem mit dem Betätigungselement in Verbindung stehenden Kopfstück begrenzt wird, wobei das Kopfstück eine gerundete Querschnittsgestaltung hat und das Betätigungselement während der Öffnungs- und Schließbewegung des Schließkolbens an dem gerundeten Kopfstück in die Öffnungs- bzw. Schließstellung entlanggleitet, wobei die Rundung des Kopfstückes an die Bewegungsbahn des Betätigungselementes angepasst ist.To solve this problem, the self-closing dispensing head for a pressure vessel of the type mentioned is characterized in that the closing element is designed as a movable closing piston with on its piston skirt surface at a distance provided and movable with the closing piston Zentrieransätzen, wherein between individual Zentrieransätzen flow-through are provided for the medium, which is provided on the side facing away from the dispensing opening end face of the closing piston, an elastic spring portion which is bounded at the end by a headpiece associated with the actuating element, wherein the head piece has a rounded cross-sectional configuration and the actuating element during the opening and closing movement of the closing piston on the rounded head piece slides in the open or closed position, wherein the rounding of the head piece is adapted to the movement path of the actuating element.

Damit ist ein selbstschließender Ausgabekopf für einen Druckbehälter geschaffen, mit dem sehr sauber ein Medium und nicht, wie herkömmlich eher spiralförmig, sondern geradlinig abzugeben ist. Dies ist insbesondere darauf zurückzuführen, dass aufgrund der vorgesehenen Zentrieransätze, die sich in dem zweiten Kanalabschnitt an dessen Innenflächen während der gesamten Bewegung des Schließkolbens sowohl bei Überführung in seine Öffnungsstellung als auch bei Überführung in seine Schließstellung abstützen, relative Lageabweichungen des Schließkolbens gegenüber Gehäuseteilen sicher vermieden sind, was dazu führt, dass gegenüber dem vorbekannten Stand der Technik keine Lageungenauigkeiten beim Schließvorgang im Bereich der Ausgangsöffnung auftreten, so dass der Schließkolben reproduzierbar und lagegenau in seine Öffnungs- und seine Schließstellung überführt werden kann. Dies führt dazu, dass noch in der Ausgangsöffnung verbliebene Restmengen sicher in den ersten Kanalabschnitt bei Überführung des Schließkolbens aus seiner Öffnungsstellung in die Schließstellung zurückgebracht werden können. Damit verbleiben am äußeren Bereich der Ausgabeöffnung des Ausgabekopfes allenfalls nur noch geringe Reste vom auszugebenden Medium, das vom Benutzer mit einfachen Mitteln, z.B. durch einfaches Abwischen mit dem Finger oder Abspülen zu entfernen ist. Der Gefahr einer Verstopfung der Ausgabeöffnung ist damit sicher begegnet.Thus, a self-closing dispensing head is created for a pressure vessel, with the very clean a medium and not, as conventionally rather spiral, but is straight forward. This is due in particular to the fact that due to the provided centering projections, which are supported in the second channel portion on the inner surfaces during the entire movement of the closing piston both during transfer to its open position and during transfer to its closed position, relative positional deviations of the closing piston relative to housing parts safely avoided are, which means that over the prior art, no position inaccuracies during the closing process in the region of the outlet opening occur, so that the closing piston can be reproduced and accurately translated into its open and closed position. As a result, residual quantities remaining in the outlet opening can be safely returned to the first channel section when the closing piston is transferred from its open position to the closed position. This remains at the outer region of the discharge opening of the dispensing head at best only small remnants of the medium to be dispensed, which can be removed by the user with simple means, eg by simply wiping with a finger or rinsing off. The risk of blockage of the discharge opening is thus safely met.

Da zwischen den einzelnen Zentrieransätzen Durchströmräume vorhanden sind, ist die Abgabe des Mediums nicht behindert. Gleiches gilt auch für das Zurückführen eines Mediums nach nachlassendem Druck auf das Betätigungselement und einer Bewegung des Schließkolbens in seine Schließstellung. Um eine über den Umfang gleichmäßig verteilte Zentrierung zu haben, sind die Zentrieransätze bevorzugt über einen Umfangsabschnitt gleichmäßig verteilt auf dem Schließkolben angeordnet. Hierbei hat sich herausgestellt, dass z.B. vier Zentrieransätze, die gleichmäßig über den Umfang verteilt sind, eine lagegenaue Bewegung und Zentrierung des Schließkolbens ermöglichen. Sicherzustellen ist hierbei, dass während der gesamten Schließbewegung keine Kippmomente möglich sind über die Länge des Schließkolbens, so dass sich die Zentrierelemente am Schließkolben erstrecken nahe seinem vorderen Ende. Dazu kann das vordere Ende auch eine Querschnittserweiterung haben, die sich über den Umfang des Schließkolbens erstreckt, so dass er dort einen vergrößerten Umfangsabschnitt hat, auf dem die Zentrierelemente angeordnet sind. Dies führt auch dazu, dass dort eine Erhöhung der Strömungsgeschwindigkeit des abzugebenden Mediums erfolgt.Since there are flow-through spaces between the individual centering approaches, the delivery of the medium is not hindered. The same applies to the return of a medium after decreasing pressure on the actuator and a movement of the closing piston in its closed position. In order to have an evenly distributed over the circumference centering, the centering lugs are preferably distributed over a peripheral portion evenly distributed on the closing piston. It has been found that e.g. four centering approaches, which are evenly distributed over the circumference, allow a positionally accurate movement and centering of the closing piston. It must be ensured that during the entire closing movement no tilting moments are possible over the length of the closing piston, so that the centering elements on the closing piston extend near its front end. For this purpose, the front end can also have a cross-sectional widening, which extends over the circumference of the closing piston, so that it has an enlarged peripheral portion there, on which the centering elements are arranged. This also leads to an increase in the flow rate of the medium to be dispensed there.

Besonders bevorzugt ist an dem vorderen Ende, d.h. dem Ende des Schließkolbens, der der Abgabeöffnung zugewandt ist, ein Dichtelement angespritzt, bevorzugt über einen inneren zentralen Zuführungskanal innerhalb des Schließkolbens und senkrecht dazu verlaufende, in die Mantelfläche des Schließkolbens mündende Zuführungsleitungen. Ein derartiges Dichtmaterial besteht z.B. aus einem Kunststoffweichmaterial wie z.B. TPE, Silikon. Der Schließkolben kann z.B. aus ABS-, PP- oder POM-Material, jeweils Kunststoffhartmaterialien, bestehen.Particularly preferred is at the front end, ie the end of the closing piston, which faces the discharge opening, a sealing element molded, preferably via an inner central supply channel within the closing piston and perpendicular thereto, in the lateral surface of the closing piston opening feed lines. Such a sealing material consists for example of a plastic soft material such as TPE, silicone. The closing piston can eg consist of ABS, PP or POM material, in each case plastic hard materials.

Um weiterhin das Rückführen von Abgabematerial zu begünstigen, hat der zweite Kanalabschnitt einen Ventilsitz, in den der Schließkolben mit dem Dichtelement in seiner Schließstellung vollständig einzubringen ist. Bei einer leichten Schrägausrichtung des Schließkolbens zur Horizontalen ist dabei eine Lage einzunehmen, wobei ein oberer Bereich des ausgabeseitigen Endes des Schließkolbens mit einem Abstand zum Ausgabeöffnungsende angeordnet ist, aber ansonsten auch nicht mehr über das Gehäuse des Ausgabekopfes im Bereich der Ausgabeöffnung vorsteht. Bevorzugt nimmt der Schließkolben eine Lage im Ventilsitz ein, dass sein vorderes Ende bündig mit der Außenfläche des Gehäuses abschließt, so dass Produktreste leicht entfernt werden können. Damit kann sehr sauber dort noch anhaftendes Material über die Dichtung und den Ventilsitz in den Seitenkanalabschnitt zurückgebracht werden.In order to further promote the return of dispensing material, the second channel portion has a valve seat into which the closing piston with the sealing element in its closed position is to be completely introduced. In the case of a slight oblique alignment of the closing piston relative to the horizontal, a position is assumed, wherein an upper area of the output-side end of the closing piston is arranged at a distance from the dispensing opening end, but otherwise also no longer projects beyond the housing of the dispensing head in the region of the dispensing opening. Preferably, the closing piston assumes a position in the valve seat that its front end is flush with the outer surface of the housing, so that product residues can be easily removed. This can very clean there still adhering material on the seal and the valve seat are returned to the side channel section.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus weiteren Unteransprüchen, der nachfolgenden Beschreibung und der Zeichnung. In der Zeichnung zeigen:

Fig. 1
ein Ausführungsbeispiel eines Ausgabekopfes (schematisch mit Einblick in das Innenleben) im geschlossenen Zustand des Schließkolbens;
Fig. 2
eine zu Fig. 1 analoge Darstellung mit geöffnetem Schließkolben;
Fig. 3
vergrößert ausschnittsweise eine Querschnittsdarstellung des Ausgabekopfes des Ausführungsbeispiels nach Fig. 1 im Bereich des Ausgabeendes und des Schließkolbens;
Fig. 4
eine zu Fig. 3 analoge Darstellung mit geöffnetem Schließkolben;
Fig. 5
die Darstellung nach Fig. 3 mit Ausrichtung des Schließkolbens;
Fig. 6
eine Querschnittsdarstellung gemäß der Querschnittslinie VI/VI in Fig. 5;
Fig. 7
vergrößert das der Ausgabeöffnung abgewandte Ende des Schließkolbens mit Federelement und Betätigungselement;
Fig. 8
eine Einzeldarstellung eines Schließkolbens (aufgeschnitten), mit innerem Kanal zum Anspritzen der vorderen Dichtung und des Federelementes.
Further advantageous embodiments of the invention will become apparent from further dependent claims, the following description and the drawings. In the drawing show:
Fig. 1
an embodiment of an output head (schematically with insight into the interior) in the closed state of the closing piston;
Fig. 2
one too Fig. 1 analogue representation with opened closing piston;
Fig. 3
Enlarged section of a cross-sectional view of the dispensing head of the embodiment according to Fig. 1 in the region of the discharge end and the closing piston;
Fig. 4
one too Fig. 3 analogue representation with opened closing piston;
Fig. 5
the representation after Fig. 3 with alignment of the closing piston;
Fig. 6
a cross-sectional view according to the cross-sectional line VI / VI in Fig. 5 ;
Fig. 7
increases the discharge opening facing away from the end of the closing piston with spring element and actuator;
Fig. 8
a single representation of a closing piston (cut open), with inner channel for injection molding of the front seal and the spring element.

In der Zeichnung sind grundsätzlich gleichwirkende Teile mit übereinstimmenden Bezugsziffern versehen. Allgemein mit 1 ist der Ausgabekopf beziffert, der bevorzugt einstückig mit dem nicht näher dargestellten Druckbehälter ausgebildet ist. Dieser hat ein Gehäuse 2 sowie ein nicht näher dargestelltes Abgabeventil zur Abgabe von Medien, beispielsweise viskosen, selbstschäumenden und/oder gelartigen Produkten. Dieses Abgabeventil ist dem inneren Behälterraum, in den das Medium eingefüllt ist, zugeordnet und kann durch einen Öffnungsmechanismus bedient werden.In the drawing, basically equivalent parts are provided with matching reference numerals. Generally indicated at 1 is the dispensing head, which is preferably formed integrally with the pressure vessel, not shown. This has a housing 2 and a not shown discharge valve for dispensing media, such as viscous, self-foaming and / or gel-like products. This dispensing valve is associated with the inner container space in which the medium is filled, and can be operated by an opening mechanism.

Der Ausgabekopf hat eine Ausgabeöffnung, die über einen ersten Kanalabschnitt 4 und einen zweiten Kanalabschnitt 5 in Strömungsverbindung steht. Dem zweiten Kanalabschnitt ist das als Schließkolben ausgebildete Schließelement zugeordnet, das die Ausgabeöffnung 3 beherrscht. Dieser Schließkolben ist relativ beweglich innerhalb des Kanalabschnittes 5 angeordnet, so dass er aus seiner Schließstellung (Fig. 1) in seine Öffnungsstellung (Fig. 2) bewegt werden kann.The dispensing head has a dispensing opening in fluid communication with a first channel section 4 and a second channel section 5. The second channel portion is associated with the locking element designed as a closing piston, which controls the discharge opening 3. This closing piston is arranged relatively movably within the channel section 5, so that it moves out of its closed position (FIG. Fig. 1 ) in its open position ( Fig. 2 ) can be moved.

Um diese Bewegung durchzuführen, ist ein Betätigungselement 7 vorgesehen, das aus seiner Ruhestellung (Fig. 1) in die Betätigungsstellung gedrückt und damit verschwenkt werden kann. Dieses Betätigungselement 7 betätigt gleichzeitig den Öffnungsmechanismus, mit dem das Abgabeventil geöffnet werden kann.To perform this movement, an actuating element 7 is provided, which from its rest position ( Fig. 1 ) Can be pressed into the operating position and thus can be pivoted. This actuator 7 simultaneously actuates the opening mechanism with which the dispensing valve can be opened.

Wie insbesondere näher aus den Fig. 3, 4, 5, 6 und 8 hervorgeht, sind im vorderen Bereich des Schließkolbens 6 an einem Abschnitt 6.1 Zentrieransätze 6.2 ausgebildet, die sich an den Innenmantelflächen des zweiten Kanalabschnitts 5 im Gehäuse abstützen. Im gezeigten Ausführungsbeispiel sind insgesamt vier Zentrieransätze 6.2 gleichmäßig verteilt über den Umfang angeordnet. Im vorderen Bereich des zweiten Kanalabschnittes 5, d.h. in seinem Endbereich, der in die Ausgangsöffnung 3 mündet, ist in dem Gehäuse ein Ventilsitz 3.1 ausgebildet. Diesem Ventilsitz ist der vordere Bereich des Schließkolbens 6 zugeordnet, der mit einer angespritzten Kunststoffweichmaterialdichtung 8 versehen ist. Der vordere Kopfabschnitt 6.4 des Schließkolbens 6 hat eine der konischen Gestalt des Ventilsitzes folgende kongruent ausgebildete Gestaltung und ist in den Ventilsitz vollständig einzubringen, wie dies näher Fig. 3 zeigt. Dabei nimmt der in der Fig. 3 ersichtliche obere Teil einen Abstand zur Ausgangsöffnung 3 (deren vorderes Ende) ein. Gleichwohl ist er insgesamt versenkt angeordnet in geschlossenem Zustand, so dass etwa noch verbliebene Restmengen des ausgegebenen Mediums mit einem Fingerstreich abzuwischen sind und anschließend mit einem einfachen Spülvorgang auch das noch von außen her Zugängliche vom Ventilsitz abzuspülen ist. Damit ist sicher vermieden, dass noch Restmengen, die austrocknen und verklumpen können, im Bereich der Ausgangsöffnung 3 verbleiben. Durch die Rückbewegung des Schließkolbens aus seiner aus Fig. 4 ersichtlichen Öffnungsstellung in die Schließstellung in Fig. 3 führt dazu, dass auch noch verbleibende Restmengen mit in den inneren Kanalabschnitt 5 zurückgebracht werden.As in particular closer from the Fig. 3, 4 . 5, 6 and 8th As can be seen, 6.1 centering 6.2 are formed in the front region of the closing piston 6 at a portion 6.1, which are supported on the inner circumferential surfaces of the second channel section 5 in the housing. In the illustrated embodiment, a total of four centering 6.2 are distributed evenly distributed over the circumference. In the front region of the second channel section 5, ie in its end region which opens into the outlet opening 3, a valve seat 3.1 is formed in the housing. This valve seat is associated with the front region of the closing piston 6, which is provided with a molded plastic soft material seal 8. The front head section 6.4 of the closing piston 6 has a congruent design following the conical shape of the valve seat and is to be completely introduced into the valve seat, as shown in more detail Fig. 3 shows. It takes in the Fig. 3 apparent upper part a distance from the outlet opening 3 (the front end) a. Nevertheless, he is a total of sunk arranged in the closed state, so that any remaining amounts of the spent medium are wiped with a finger prick and then with a simple flushing and the still accessible from the outside of the valve seat is rinse. This reliably avoids that residual quantities which can dry out and agglomerate remain in the area of the outlet opening 3. By the return movement of the closing piston out of his Fig. 4 apparent opening position in the closed position in Fig. 3 causes residual amounts remaining to be returned to the inner channel section 5.

Das der Ausgabeöffnung 3 abgewandte Ende des Schließkolbens hat ein Federelement 9 aus einem Kunststoffweichmaterial, das zum Betätigungselement 7 hin mit einem Kopfstück 10 versehen ist, das eine abgerundete Gleitfläche 10.1 aufweist. Das Federelement 9 ist gleichzeitig auch ein Dichtelement, so dass die Produktmasse auch dort das Behältnis nicht verlassen kann. Das Betätigungselement hat eine entsprechend kongruent ausgebildete Kontaktfläche 7.1, die im Verlaufe der Betätigung, also Niederdrücken des Betätigungselementes 7 an dieser Fläche 10.1 entlanggleitet. Aufgrund der Abrundung liegen dort nur relativ geringe Reibkräfte vor, was auch dazu führt, dass auch keine Kippmomente wie im Stand der Technik auf den Schließkolben übertragen werden. Des weiteren läßt sich die angestrebte Beinahe-Horizontallage des Schließkolbens verwirklichen, obgleich senkrecht auf das Betätigungselement eingewirkt wird. Aufgrund der geringen Reibungskräfte, der verminderten Kippmomente und den vorgesehenen Zentrieransätzen 6.2 ist der Schließkolben sehr lagegenau in die jeweilige Öffnungs- bzw. Schließstellung zu überführen, was zu einem optimierten Dichtverhalten und Einnahme der Schließstellung mit überlagertem Rückführen des Mediums führt. In Fig. 8 ist der innere Kanal 6.5 ersichtlich, in den Querkanäle 6.6 zum Anspritzen der Dichtung 8 und des Federelementes 9 münden.The discharge opening 3 facing away from the end of the closing piston has a spring element 9 made of a plastic soft material, which is provided to the actuating element 7 out with a head 10, which has a rounded sliding surface 10.1. The spring element 9 is at the same time a sealing element, so that the product mass can not leave the container there either. The actuating element has a correspondingly congruent contact surface 7.1, which slides along this surface 10.1 in the course of the actuation, that is to say depression of the actuating element 7. Due to the rounding there are only relatively low frictional forces, which also means that no tilting moments are transmitted to the closing piston as in the prior art. Furthermore, the desired near-horizontal position of the closing piston can be realized, although it is acted perpendicular to the actuating element. Due to the low frictional forces, the reduced tilting moments and the provided centering approaches 6.2 the closing piston is very precise position in the respective open or closed position to transfer, which leads to an optimized sealing behavior and taking the closed position with superimposed return of the medium. In Fig. 8 is the inner channel 6.5 can be seen in the transverse channels 6.6 for molding the seal 8 and the spring element 9 open.

Claims (5)

Selbstschließender Ausgabekopf für einen Druckbehälter mit einem Abgabeventil zur Abgabe von Medien, insbesondere Viskosen, selbstschäumenden und/oder gelartigen Produkten, wobei der Ausgabekopf eine durch ein Schließelement verschließbare Ausgabeöffnung (3), einen Öffnungsmechanismus, durch welchen im montierten Zustand das Abgabeventil des Druckbehälters geöffnet werden kann, und einen in die Ausgabeöffnung (3) mündenden Kanal für das Medium aufweist, wobei der Kanal wenigstens einen ersten Kanalabschnitt (4) und einen zweiten Kanalabschnitt (5) aufweist und wobei durch Druck auf ein Betätigungselement (7) sowohl der Öffnungsmechanismus betätigt als auch das als beweglicher Schließkolben (6) ausgebildete Schließelement und der zweite Kanalabschnitt (5) relativ zueinander derart bewegt werden, dass das Schließelement unter Freigabe einer Ausgabeöffnung (3) aus der Ausgabeöffnung (3) herausbewegbar ist, dadurch gekennzeichnet, dass das Schließelement als beweglicher Schließkolben (6) mit auf seiner Kolbenmantelfläche mit Abstand zueinander vorgesehenen und mit dem Schließkolben (6) bewegbaren Zentrieransätzen (6.2) ausgebildet ist, wobei zwischen einzelnen Zentrieransätzen (6.2) Durchströmräume (6.3) für das Medium vorgesehen sind, das an dem mit der Ausgabeöffnung (3) abgewandten Stirnende des Schließkolbens (6) ein elastischer Federbereich (9) vorgesehen ist, der endseitig von einem mit dem Betätigungselement (7) in Verbindung stehenden Kopfstück (10) begrenzt wird, wobei das Kopfstück (10) eine gerundete Querschnittsgestaltung hat und das Betätigungselement (7) während der Öffnungs- und Schließbewegung des Schließkolbens (6) an dem gerundeten Kopfstück (10) in die Öffnungs- bzw. Schließstellung entlanggleitet, wobei die Rundung des Kopfstückes (10) an die Bewegungsbahn des Betätigungselementes (7) angepasst ist.Self-closing dispensing head for a pressure vessel with a dispensing valve for dispensing media, in particular viscose, self-foaming and / or gelatinous products, wherein the dispensing head a closable by a closing element discharge opening (3), an opening mechanism through which the discharge valve of the pressure vessel are opened in the assembled state can, and has a channel opening into the discharge opening (3) for the medium, wherein the channel has at least a first channel portion (4) and a second channel portion (5) and wherein actuated by pressure on an actuating element (7) both the opening mechanism also the closing element formed as a movable closing piston (6) and the second channel section (5) are moved relative to one another such that the closing element can be moved out of the dispensing opening (3) while releasing a dispensing opening (3), characterized in that the closing element is movable he closing piston (6) is provided with on its piston skirt surface at a distance from each other and with the closing piston (6) movable centering lugs (6.2), between each centering lugs (6.2) flow-through spaces (6.3) are provided for the medium, the end face of the closing piston (6) facing away from the discharge opening (3) is provided with an elastic spring area (9) which is delimited at the end by a head piece (10) which is connected to the actuating element (7), the head piece (10 ) has a rounded cross - sectional configuration and slides the actuating element (7) during the opening and closing movement of the closing piston (6) on the rounded head piece (10) in the open or closed position, wherein the rounding of the head piece (10) to the movement path of the Actuating element (7) is adapted. Selbstschließender Ausgabekopf nach Anspruch 1, dadurch gekennzeichnet, dass die Zentrieransätze (6.2) gleichmäßig über den Umfang des Schließkolbens (6) verteilt auf dessen Mantelfläche vorgesehen sind.Self-closing dispensing head according to claim 1, characterized in that the centering lugs (6.2) are distributed uniformly over the circumference of the closing piston (6) provided on the lateral surface thereof. Selbstschließender Ausgabekopf nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Längsmittelachse des Schließkolbens (6) derart ausgerichtet ist, dass sie einen Winkel α von kleiner 15° zur Horizontalen aufweist.Self-closing dispensing head according to claim 1 or 2, characterized in that the longitudinal center axis of the closing piston (6) is oriented such that it has an angle α of less than 15 ° to the horizontal. Selbstschließender Ausgabekopf nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Schließkolben (6) eine mit einer angespritzten Dichtung (8) aus einem Kunststoffweichmaterial versehenes Kopfstück hat und der zweite Kanalabschnitt (5) einen Ventilsitz (3.1) hat, in den der Schließkolben (6) mit dem Dichtelement (8) für die Einnahme der Schließstellung vollständig oder mit zumindest einem teilweisen Abstand zum vorderen Ausgabeende der Ausgabeöffnung (3) einführbar ist.Self-closing dispensing head according to one of claims 1 to 3, characterized in that the closing piston (6) and one with a molded-on seal (8) provided with a soft plastic material head part, the second channel section (5) a valve seat (3.1) has, in the Closing piston (6) with the sealing element (8) for taking the closed position completely or at least a partial distance to the front output end of the discharge opening (3) can be inserted. Selbstschließender Ausgabekopf nach Anspruch 4, dadurch gekennzeichnet, dass der Schließkolben (6) eine zentrale Leitung und im Bereich des vorzusehenden Dichtungselementes mit zur Mantelfläche des Schließkolbens (6) hin ausgerichteten, in den zentralen Öffnungskanal mündenden Abzweigungsleitungen zum Anspritzen des Weichdichtungselementes (8) versehen ist.Self-closing dispensing head according to claim 4, characterized in that the closing piston (6) is provided with a central conduit and in the region of the sealing element to be provided with to the lateral surface of the closing piston (6) aligned, opening into the central opening channel branch lines for molding the soft sealing element (8) ,
EP08016191.2A 2007-09-15 2008-09-15 Self-closing dispensing head Active EP2036833B1 (en)

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ES2527108T3 (en) 2015-01-20
DE102007044180A1 (en) 2009-03-19
EP2036833B1 (en) 2014-10-15
US20090230156A1 (en) 2009-09-17
PL2036833T3 (en) 2015-04-30
DE102007044180B4 (en) 2014-02-06
EP2036833A3 (en) 2014-01-15

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