EP0502519B1 - Cartridge for plastic masses having several components - Google Patents
Cartridge for plastic masses having several components Download PDFInfo
- Publication number
- EP0502519B1 EP0502519B1 EP92103764A EP92103764A EP0502519B1 EP 0502519 B1 EP0502519 B1 EP 0502519B1 EP 92103764 A EP92103764 A EP 92103764A EP 92103764 A EP92103764 A EP 92103764A EP 0502519 B1 EP0502519 B1 EP 0502519B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cartridge
- moulded
- shut
- mouthpiece
- header
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- 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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/32—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging two or more different materials which must be maintained separate prior to use in admixture
- B65D81/325—Containers having parallel or coaxial compartments, provided with a piston or a movable bottom for discharging contents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
- B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
- B05C17/00503—Details of the outlet element
- B05C17/00506—Means for connecting the outlet element to, or for disconnecting it from, the hand tool or its container
- B05C17/00513—Means for connecting the outlet element to, or for disconnecting it from, the hand tool or its container of the thread type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
- B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
- B05C17/00503—Details of the outlet element
- B05C17/00516—Shape or geometry of the outlet orifice or the outlet element
Definitions
- the invention relates to multicomponent cartridges for plastic compositions, such as two-component adhesives or sealant compositions, in which the components are stored separately from one another before use and are only mixed together for use.
- the invention relates to a multi-chamber cartridge made of plastic injection molding for two- or multi-component plastic masses, with at least two cartridge tube wall parts arranged one inside the other to form at least two chambers for receiving one material component each, an end wall part arranged at the front end of the cartridge tube wall parts, on which a mouthpiece for Output of the material components is formed from the cartridge, and with pistons inserted at the rear end of the cartridge tube wall parts for expressing the material components.
- a multi-chamber cartridge of this type which corresponds to the preamble of claim 1, is known from EP-A-105181.
- shut-off valves at the outlet which are intended to prevent the material from flowing back when the pressure on the pistons is removed.
- these shut-off valves are designed as check valves and are arranged separately in the outlet channel of each chamber.
- the shut-off valve described in U.S. Patent 4,846,373 has a rotatable valve plug arranged transversely in a neck extension of the cartridge end wall and having two parallel transverse bores which can be brought into and out of register with the two outlet channels of the two chambers by rotating the valve plug.
- the aim of the invention is to improve a multi-chamber cartridge of the type mentioned so that it can be manufactured more easily and with simpler injection molding tools.
- Another object of the invention is to be able to manufacture two-chamber cartridges for different mixing ratios of the two components with a reasonable amount of injection mold.
- a still further object of the invention is to provide an improved shut-off valve at the outlet of a multi-chamber cartridge.
- the invention accordingly includes a multi-chamber cartridge made of plastic injection molding for two- or multi-component plastic masses, with at least two cartridge tube wall parts arranged one inside the other to form at least two chambers for accommodating one material component each, an end wall part arranged at the front end of the cartridge tube wall parts, on which a piece for dispensing the Material components formed from the cartridge, pistons used at the rear end of the cartridge tube wall parts for expressing the material components, the end wall part being designed as a separate head piece and the cartridge tube wall parts likewise being each made separately, and wherein snap connections are provided for connecting the cartridge tube wall parts to the head piece.
- the cartridge tube wall parts and the cartridge end wall part can each be manufactured separately, as a result of which the required injection molding tools can be made very simple and inexpensive.
- the injection molding tools for the tube wall parts do not require any side shift functions, and the need for remaining side shift functions is reduced to the injection molding tool for the relatively small cartridge end wall part.
- the multi-chamber cartridge according to the invention offers the possibility of reacting much more flexibly and quickly to short-term changes in the cartridge mixing ratio, for example in the case of a double coaxial cartridge, only the diameter of the inner tube of the cartridge, that is to say only the relevant simple tool, being changed or newly built.
- the end wall part can be designed for a number of different inner tube diameters which can be optionally fitted.
- the undercuts required to implement the snap-in technique are dimensionally designed so that they can be produced in an injection molding tool without side-shift functions on the one hand and that snap-on action can be achieved by elastic material deformation on the other. Accordingly, the radial expansion of the undercuts is in the tenths of a millimeter range.
- the invention includes a multi-chamber cartridge made of plastic injection molding for two- or multi-component plastic masses, with at least two Cartridge wall parts arranged one inside the other to form at least two chambers for receiving one material component each, an end wall part arranged at the front end of the cartridge pipe wall parts, on which a mouthpiece for dispensing the material components from the cartridge is formed, which is connected to each chamber through an outlet opening formed in the front wall part , Piston used at the rear end of the cartridge tube wall parts for pressing out the material components, and a mouthpiece shut-off device associated with the mouthpiece for optional closing or opening of the mouthpiece, which has a shut-off device which can be rotated between an open position and a closed position, the shut-off device having a disc which is soft is arranged on the mouthpiece of the cartridge transversely to the material flow direction directly in front of the outlet openings of the mouthpiece and can be rotated about an axis parallel to the longitudinal axis of the cartridge, and wherein the S disk itself has passage openings which can be brought
- the actuation movement takes place as a rotary movement about an axis lying parallel to the longitudinal axis of the cartridge.
- This operation of the shut-off device is perceived as pleasant and easy. It can be easily carried out with the hand holding the front end of the cartridge in the spray gun.
- 1 and 2 consists of a cartridge outer tube 10, a cartridge inner tube 20, a cartridge head piece 30 forming the end wall, which is attached to the front end of the cartridge tubes, and corresponding pressure pistons 40, which are inserted at the rear end of the cartridge tubes .
- a screw sleeve 50 is on the cartridge head piece 30 a locking mechanism 60 rotatable about the longitudinal axis is attached, onto which a mixing nozzle can be screwed.
- 2 shows openings 34 in the cartridge head piece 30, which in the example shown in FIG. 1 are aligned with openings 61 of the closure mechanism.
- the cartridge outer tube 10, the cartridge inner tube 20 and the cartridge head piece 30 each represent separate individual parts, the cartridge tubes 10 and 20 being latched into the cartridge head piece 30.
- the cartridge head piece 30 each has coaxial, cylindrical projections 31 and 32 or 31a and 32a, which are each arranged with a radial distance corresponding to the wall thickness of the respective cartridge tube 10 or 29.
- FIG. 1A shows the detail X encircled in FIG. 1 on an enlarged scale.
- the radially outer projection 31 of the cartridge head piece 30 has an undercut 35 and the outer tube 10 of the cartridge has a nose 11 corresponding to the undercut 35, which are locked into one another.
- both the undercut 35 and the nose 11 run continuously around the entire circumference of the cartridge head piece 30 or cartridge outer tube 10.
- the radially outer projection 33 of the cartridge head piece 30, which serves for fastening the cartridge inner tube 20 has a corresponding undercut and the cartridge inner tube 20 has a corresponding nose.
- the undercut 35 is preferably carried out in the radially outer projection, since when the head piece 30 is manufactured and the cartridge tubes 10 and 20 snap into the projections 31 and 32 or 31a and 32a, it is easier to bend the corresponding projection 31 or 31a, than in the opposite case a compression of the projection 32 or 32a.
- the cartridge headpiece 30 has an eccentric neck 31b, which is divided on the inside by an arcuate web 32b into two chambers, each of which is connected to a material chamber formed by the cartridge tubes 10, 20, and which is provided on the outside with a thread .
- the shut-off element 60 consists essentially of a hollow cylinder open at the top, which is divided into two partial cylinders by a central web 61, a thread for screwing on, for example, a mixing nozzle and two vanes 62 or another handle element for actuating the shut-off element 60 being provided.
- the screw sleeve 50 engages in a circumferential groove 63 of the shut-off element, the overhang of this engagement being dimensioned such that a snap-in of both parts made of plastic is made possible by elastic material deformation and corresponding flank design.
- This engagement between the screw sleeve 50 and the shut-off element 60 makes it possible to rotate the shut-off element 60 with respect to the retaining nut 50 and the neck 31 with a correspondingly selected axial compressive force.
- the neck 31b of the cartridge head 30 is at its Shut-off element 60 facing end closed with a bottom 33, in which two openings 34 are provided, each opening being on one side of the web 32b and correspondingly connected to the respective material chamber (see also FIG. 2).
- a bottom 64 of the cylinder 60 which forms the actual shut-off element has openings 65 which are congruent with respect to position and shape with respect to the openings 34 and which are shown one above the other in FIGS. 1 and 3; this corresponds to the open position of the shutoff element 60.
- shut-off element 60 shows the closed position of the shut-off element 60.
- the shut-off element 60 is rotated through 90 ° about its longitudinal axis, as a result of which the corresponding openings 34 of the head piece 30 and openings 65 of the shut-off element 60 no longer communicate and are therefore closed.
- the shut-off device 60 can be rotated in a defined manner, it is subjected to a positive guidance shown in FIGS. 5 and 6. 5, the shut-off element 60 has at its lower end two diametrically opposite projecting stop lugs 66 which engage in corresponding guide grooves 35 (FIG. 6) embedded in the bottom 33 of the neck 31b and, after a corresponding rotation of the shut-off member 30, abut against the boundaries thereof, so that defined open and closed positions are given.
- FIG. 6 shows another embodiment of the coaxial cartridge with a closure element 60 according to the invention.
- the only difference from the embodiment shown in FIG. 1 is that the circular web 32b is practically completely missing, but instead the shut-off cylinder 60 extends down to the plane formed by the cartridge head piece 30.
- This embodiment is preferable to that shown in FIG. 1 for reasons of injection molding with regard to the head piece 30.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Closures For Containers (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
- Coating Apparatus (AREA)
Description
Die Erfindung bezieht sich auf Mehrkomponentenkartuschen für plastische Massen, wie beispielsweise zweikomponentige Klebstoffe oder Dichtstoffmassen, bei welchen die Komponenten vor Gebrauch getrennt voneinander aufbewahrt und erst zum Gebrauch miteinander vermischt werden.The invention relates to multicomponent cartridges for plastic compositions, such as two-component adhesives or sealant compositions, in which the components are stored separately from one another before use and are only mixed together for use.
Insbesondere bezieht sich die Erfindung auf eine aus Kunststoffspritzguß hergestellte Mehrkammerkartusche für zwei- oder mehrkomponentige plastische Massen, mit mindestens zwei ineinander angeordneten Kartuschenrohrwandteilen zur Bildung mindestens zweier Kammern zur Aufnahme jeweils einer Materialkomponente, einem am vorderen Ende der Kartuschenrohrwandteile angeordneten Stirnwandteil, an welchem ein Mundstück zur Ausgabe der Materialkomponenten aus der Kartusche gebildet ist, und mit am hinteren Ende der Kartuschenrohrwandteile eingesetzten Kolben zum Ausdrücken der Materialkomponenten. Ein Mehrkammerkartusche dieser Art, die dem Oberbegriff der Anspruchs 1 entspricht, ist aus der EP-A-105181 bekannt.In particular, the invention relates to a multi-chamber cartridge made of plastic injection molding for two- or multi-component plastic masses, with at least two cartridge tube wall parts arranged one inside the other to form at least two chambers for receiving one material component each, an end wall part arranged at the front end of the cartridge tube wall parts, on which a mouthpiece for Output of the material components is formed from the cartridge, and with pistons inserted at the rear end of the cartridge tube wall parts for expressing the material components. A multi-chamber cartridge of this type, which corresponds to the preamble of claim 1, is known from EP-A-105181.
Solche als Zweikammerkartuschen für zweikomponentige Massen mit koaxial ineinander angeordneten Kartuschenrohrwandteilen sind bereits bekannt, siehe beispielsweise US-Patent 2 826 339 (Maillard), US-Patent 4 366 919 (Anderson), und US-Patent 4 846 373 (Penn, Anderson). Bei den bekannten Zweikammerkartuschen sind die Rohrwandteile und das Stirnwandteil einteilig miteinander in einem Spritzgußvorgang aus Kunststoff hergestellt, was ein entsprechend kompliziertes und teures Spritzgußwerkzeug erfordert.Such as two-chamber cartridges for two-component compositions with coaxially arranged cartridge tube wall parts are already known, see, for example, US Pat. No. 2,826,339 (Maillard), US Pat. No. 4,366,919 (Anderson), and US Pat. No. 4,846,373 (Penn, Anderson). In the known two-chamber cartridges, the tube wall parts and the end wall part are in one piece with one another in an injection molding process made of plastic manufactured, which requires a correspondingly complicated and expensive injection molding tool.
Die bekannten Zweikammerkartuschen nach dem US-Patent 2 826 339 und nach dem US-Patent 4 846 373 sind außerdem am Auslaß mit Absperrventilen versehen, die ein Nachfließen des Materials beim Wegnehmen des Preßdrucks auf die Kolben verhindern sollen. Beim US-Patent 2 826 339 sind diese Absperrventile als Rückschlagventile ausgebildet und im Auslaßkanal jeder Kammer gesondert angeordnet. Das im US-Patent 4 846 373 beschriebene Absperrventil weist ein quer in einem Halsansatz der Kartuschenstirnwand angeordnetes drehbares Ventilküken mit zwei parallelen Querbohrungen auf, die durch Drehen des Ventilkükens in und außer Deckung mit den beiden Auslaßkanälen der beiden Kammern gebracht werden können.The known two-chamber cartridges according to US Pat. No. 2,826,339 and US Pat. No. 4,846,373 are also provided with shut-off valves at the outlet which are intended to prevent the material from flowing back when the pressure on the pistons is removed. In US Pat. No. 2,826,339, these shut-off valves are designed as check valves and are arranged separately in the outlet channel of each chamber. The shut-off valve described in U.S. Patent 4,846,373 has a rotatable valve plug arranged transversely in a neck extension of the cartridge end wall and having two parallel transverse bores which can be brought into and out of register with the two outlet channels of the two chambers by rotating the valve plug.
Ziel der Erfindung ist es, eine Mehrkammerkartusche der genannten Art so zu verbessern, daß sie sich leichter und mit einfacheren Spritzgußwerkzeugen fertigen läßt.The aim of the invention is to improve a multi-chamber cartridge of the type mentioned so that it can be manufactured more easily and with simpler injection molding tools.
Ein weiteres Ziel der Erfindung liegt darin, Zweikammerkartuschen für unterschiedliche Mischungsverhältnisse der beiden Komponenten mit vertretbarem Spritzgußwerkzeugaufwand herstellen zu können.Another object of the invention is to be able to manufacture two-chamber cartridges for different mixing ratios of the two components with a reasonable amount of injection mold.
Ein noch weiters Ziel der Erfindung besteht darin, ein verbessertes Absperrventil am Auslaß einer Mehrkammerkartusche zu schaffen.A still further object of the invention is to provide an improved shut-off valve at the outlet of a multi-chamber cartridge.
Die Erfindung beinhaltet demgemäß eine aus Kunststoffspritzguß hergestellte Mehrkammerkartusche für zwei- oder mehrkomponentige plastische Massen, mit mindestens zwei ineinander angeordneten Kartuschenrohrwandteilen zur Bildung mindestens zweier Kammern zur Aufnahme jeweils einer Materialkomponente, einem am vorderen Ende der Kartuschenrohrwandteile angeordneten Stirnwandteil, an welchem ein Munstück zur Ausgabe der Materialkomponenten aus der Kartusche gebildet ist, am hinteren Ende der Kartuschenrohrwandteile eingesetzten Kolben zum Ausdrücken der Materialkomponenten, wobei das Stirnwandteil als gesondertes Kopfstück ausgebildet ist und die Kartuschenrohrwandteile ebenfalls als jeweils separat hergestellte Teile ausgebildet sind, und wobei zur Verbindung der Kartuschenrohrwandteile mit dem Kopfstück Schnappverbindungen vorgesehen sind.The invention accordingly includes a multi-chamber cartridge made of plastic injection molding for two- or multi-component plastic masses, with at least two cartridge tube wall parts arranged one inside the other to form at least two chambers for accommodating one material component each, an end wall part arranged at the front end of the cartridge tube wall parts, on which a piece for dispensing the Material components formed from the cartridge, pistons used at the rear end of the cartridge tube wall parts for expressing the material components, the end wall part being designed as a separate head piece and the cartridge tube wall parts likewise being each made separately, and wherein snap connections are provided for connecting the cartridge tube wall parts to the head piece.
Durch die erfindungemäße Mehrkammerkartusche können die Kartuschenrohrwandteile und das Kartuschenstirnwandteil jeweils separat hergestellt werden, wodurch die erforderlichen Spritzgußwerkzeuge sehr einfach ausgeführt und billig sein können. Die Spritzgußwerkzeuge für die Rohrwandteile benötigen nämlich keine Seitenschieber-Funktionen, und die Notwendigkeit verbleibender Seitenschieber-Funktionen reduziert sich auf das Spritzgußwerkzeug für das verhältnismäßig kleine Kartuschenstirnwandteil.Due to the multi-chamber cartridge according to the invention, the cartridge tube wall parts and the cartridge end wall part can each be manufactured separately, as a result of which the required injection molding tools can be made very simple and inexpensive. The injection molding tools for the tube wall parts do not require any side shift functions, and the need for remaining side shift functions is reduced to the injection molding tool for the relatively small cartridge end wall part.
Des weiteren bietet die erfindungsgemäße Mehrkammerkartusche die Möglichkeit, sehr viel flexibler und schneller auf kurzfristige Änderungen des Kartuschenmischverhältnisses zu reagieren, in dem beispielsweise bei einer Doppel-Koaxialkartusche lediglich der Durchmesser des Kartuscheninnenrohrs, also nur das diesbezügliche einfache Werkzeug verändert bzw. neu gebaut wird. Insbesondere kann das Stirnwandteil für mehrere verschiedene, wahlweise aufzusteckende Innenrohrdurchmesser ausgebildet sein.Furthermore, the multi-chamber cartridge according to the invention offers the possibility of reacting much more flexibly and quickly to short-term changes in the cartridge mixing ratio, for example in the case of a double coaxial cartridge, only the diameter of the inner tube of the cartridge, that is to say only the relevant simple tool, being changed or newly built. In particular, the end wall part can be designed for a number of different inner tube diameters which can be optionally fitted.
Die zur Realisierung der Schnapptechnik erforderlichen Hinterschneidungen werden maßlich so ausgeführt, daß sie einerseits in einem Spritzgußwerkzeug ohne Seitenschieber-Funktionen herstellbar sind und andererseits ein Einschnappen durch elastische Materialverformung erreichbar ist. Dementsprechend bewegt sich deshalb die Radialausdehnung der Hinterschneidungen im Zehntel-Millimeter-Bereich.The undercuts required to implement the snap-in technique are dimensionally designed so that they can be produced in an injection molding tool without side-shift functions on the one hand and that snap-on action can be achieved by elastic material deformation on the other. Accordingly, the radial expansion of the undercuts is in the tenths of a millimeter range.
Des weiteren beinhaltet die Erfindung eine aus Kunststoffspritzguß hergestellte Mehrkammerkartusche für zwei- oder mehrkomponentige plastische Massen, mit mindestens zwei ineinander angeordneten Kartuschenrohrwandteilen zur Bildung mindestens zweier Kammern zur Aufnahme jeweils einer Materialkomponente, einem am vorderen Ende der Kartuschenrohrwandteile angeordneten Stirnwandteil, an welchem ein Mundstück zur Ausgabe der Materialkomponenten aus der Kartusche gebildet ist, das mit jeder Kammer durch eine im Stirnwandteil gebildete Austrittsöffnung in Verbindung steht, am hinteren Ende der Kartuschenrohrwandteile eingesetzten Kolben zum Ausdrücken der Materialkomponenten, und einer dem Mundstück zugeordneten Mundstück-Absperrvorrichtung zum wahlweisen Verschließen bzw. Öffnen des Mundstücks, die ein zwischen einer Offenstellung und einer Schließstellung drehbares Absperrorgan aufweist, wobei das Absperrorgan eine Scheibe aufweist, weiche am Mundstück der Kartusche quer zur Materialströmungsrichtung direkt vor den Austrittsöffnungen des Mundstücks angeordnet ist und um eine zur Kartuschenlängsachse parallele Achse drehbar ist, und wobei die Scheibe ihrerseits Durchtrittsöffnungen aufweist, die durch Drehen der Scheibe zwischen Offen- und Schließstellung in und außer Deckung mit den Austrittsöffnungen des Mundstücks bringbar sind.Furthermore, the invention includes a multi-chamber cartridge made of plastic injection molding for two- or multi-component plastic masses, with at least two Cartridge wall parts arranged one inside the other to form at least two chambers for receiving one material component each, an end wall part arranged at the front end of the cartridge pipe wall parts, on which a mouthpiece for dispensing the material components from the cartridge is formed, which is connected to each chamber through an outlet opening formed in the front wall part , Piston used at the rear end of the cartridge tube wall parts for pressing out the material components, and a mouthpiece shut-off device associated with the mouthpiece for optional closing or opening of the mouthpiece, which has a shut-off device which can be rotated between an open position and a closed position, the shut-off device having a disc which is soft is arranged on the mouthpiece of the cartridge transversely to the material flow direction directly in front of the outlet openings of the mouthpiece and can be rotated about an axis parallel to the longitudinal axis of the cartridge, and wherein the S disk itself has passage openings which can be brought into and out of coincidence with the outlet openings of the mouthpiece by rotating the disk between the open and closed positions.
Bei der erfindungsgemäßen Absperrvorrichtung erfolgt die Betätigungsbewegung als Drehbewegung um eine parallel zur Kartuschenlängsachse liegenden Achse. Dieses Bedienen der Absperrvorrichtung wird als angenehm und leicht empfunden. Es läßt sich mit der das vordere Ende der Kartusche in der Spritzpistole haltenden Hand leicht ausführen.In the shut-off device according to the invention, the actuation movement takes place as a rotary movement about an axis lying parallel to the longitudinal axis of the cartridge. This operation of the shut-off device is perceived as pleasant and easy. It can be easily carried out with the hand holding the front end of the cartridge in the spray gun.
Die Erfindung wird nachstehend anhand von Ausführungsbeispielen unter Bezugnahme auf die anliegenden Zeichnungen mehr im einzelnen beschrieben.The invention is described in more detail below using exemplary embodiments with reference to the accompanying drawings.
In den Zeichnungen zeigt:
- Fig. 1
- einen Längsschnitt durch eine erfindungsgemäße Zweikammer-Koaxialkartusche mit einer Absperrvorrichtung am Kartuschenauslaß,
- Fig. 1A
- vergrößert die in Fig. 1 eingekreiste Einzelheit X,
- Fig. 2
- einen Querschnitt durch die Kartusche nach Fig. 1 entsprechend der Schnittlinie II-II in Fig. 1,
- Fig. 3
- eine Stirnansicht der Kartusche nach Fig. 1 mit geöffnetem Absperrorgan,
- Fig. 4
- eine Stirnansicht wie in Fig. 3, jedoch mit geschlossenem Absperrorgan,
- Fig. 5
- eine Untersicht des Absperrorgans entsprechend der Linie V-V in Fig. 1,
- Fig. 6
- eine Stirnansicht des Kopfstücks der in Fig. 1 dargestellten Kartusche entsprechend der Linie VI-VI in Fig. 1, und
- Fig. 7
- eine alternative Ausführungsform der Absperrvorrichtung im Längsschnitt.
- Fig. 1
- a longitudinal section through a two-chamber coaxial cartridge according to the invention with a shut-off device at the cartridge outlet,
- Fig. 1A
- enlarges the detail X encircled in FIG. 1,
- Fig. 2
- 2 shows a cross section through the cartridge according to FIG. 1 along the section line II-II in FIG. 1,
- Fig. 3
- 1 with the shut-off device open,
- Fig. 4
- 3 shows an end view as in FIG. 3, but with the shut-off element closed,
- Fig. 5
- a bottom view of the shut-off device along the line VV in Fig. 1,
- Fig. 6
- an end view of the head of the cartridge shown in Fig. 1 along the line VI-VI in Fig. 1, and
- Fig. 7
- an alternative embodiment of the shut-off device in longitudinal section.
Die in den Fig. 1 und dargestellte Doppel-Koaxialkartusche besteht aus einem Kartuschenaußenrohr 10, einem Kartuscheninnenrohr 20, einem die Stirnwand bildenden Kartuschenkopfstück 30, welches am vorderen Ende der Kartuschenrohre aufgesetzt ist, und entsprechenden Druckkolben 40, welche am hinteren Ende der Kartuschenrohre eingesetzt sind. Auf dem Kartuschenkopfstück 30 ist mittels einer Schraubmuffe 50 ein um die Längsachse drehbarer Verschlußmechanismus 60 befestigt, auf welchen eine Mischdüse aufschraubbar ist. In Fig. 2 sind Öffnungen 34 im Kartuschenkopfstück 30 erkennbar, welche in dem in Fig. 1 dargestellten Beispiel mit Öffnungen 61 des Verschlußmechanismus ausgerichtet sind.1 and 2 consists of a cartridge
Wie aus der Fig. 1 zu erkennen ist, stellen das Kartuschenaußenrohr 10, das Kartuscheninnenrohr 20 und das Kartuschenkopfstück 30 jeweils separate Einzelteile dar, wobei jeweils die Kartuschenrohre 10 und 20 in das Kartuschenkopfstück 30 eingerastet sind. Das Kartuschenkopfstück 30 weist dazu jeweils koaxiale, zylindrische Vorsprünge 31 und 32 bzw. 31a und 32a auf, die jeweils mit einem der Wandstärke des jeweiligen Kartuschenrohrs 10 bzw 29 entsprechenden Radialabstand angeordnet sind.As can be seen from FIG. 1, the cartridge
Fig. 1A stellt die in Fig. 1 eingekreiste Einzelheit X vergrößert dar. Dort ist zu erkennen, daß der radial äußere Vorsprung 31 des Kartuschenkopfstücks 30 eine Hinterschneidung 35 und das Kartuschenaußenrohr 10 eine der Hinterschneidung 35 entsprechende Nase 11 aufweist, welche ineinander eingerastet sind. Sowohl die Hinterschneidung 35 als auch die Nase 11 verlaufen im vorliegenden Ausführungsbeispiel durchgehend um den gesamten Umfang des Kartuschenkopfstücks 30 bzw. Kartuschenaußenrohrs 10. Analog dazu weist der radial äußere Vorsprung 33 des Kartuschenkopfstücks 30, welcher zur Befestigung des Kartuscheninnenrohr 20 dient, eine entsprechende Hinterschneidung und das Kartuscheninnenrohr 20 eine entsprechende Nase auf.FIG. 1A shows the detail X encircled in FIG. 1 on an enlarged scale. There it can be seen that the radially
Vorzugsweise ist die Hinterschneidung 35 jeweils im radial äußeren Vorsprung ausgeführt, da beim Herstellen des Kopfstücks 30 und beim Einrasten der Kartuschenrohre 10 und 20 in die Vorsprünge 31 und 32 bzw. 31a und 32a ein Aufbiegen des entsprechenden Vorsprungs 31 bzw. 31a leichter möglich ist, als im umgekehrten Falle ein Stauchen des Vorsprungs 32 bzw. 32a.The undercut 35 is preferably carried out in the radially outer projection, since when the
Aus Gründen der Deutlichkeit ist die Radialausdehnung der Hinterschneidung 35 bzw. der Nase 11 in den Fig. 1 und 3 übertrieben dargestellt; sie nimmt nur sehr geringe Ausmaße an und bewegt sich bei den in der Praxixs vorkommenden Kartuschen im Zehntel-Millimeter-Bereich.For reasons of clarity, the radial extent of the undercut 35 or the
Nunmehr wird die Absperrvorrichtung am Kartuschen-Kopfstück beschrieben.The shut-off device on the cartridge head piece will now be described.
Das Kartuschenkopfstück 30 weist gemäß Fig. 1 einen exzentrischen Hals 31b auf, welcher im Inneren durch einen kreisbogenförmigen Steg 32b in zwei jeweils mit einer durch die Kartuschenrohre 10, 20 gebildeten Materialkammern in Verbindung stehende Kammern geteilt ist, und welcher außen mit einem Gewinde versehen ist.1, the
Auf diesem Gewinde sitzt eine Schraubmuffe 50, welche ein Absperrorgan 60 drehbar auf dem Hals 31b des Kartuschenkopfstücks 30 hält.On this thread sits a
Das Absperrorgan 60 besteht im wesentlichen aus einem oben offenen Hohlzylinder, welcher durch einen Mittelsteg 61 in zwei Teilzylinder geteilt ist, wobei ein Gewinde zum Aufschrauben beispielsweise einer Mischdüse und zwei Flügel 62 oder ein sonstiges Griffelement zum Betätiguen des Absperrorgans 60 vorgesehen sind.The shut-off
Die Schraubmuffe 50 greift in eine Umfangsnut 63 des Absperrorgans ein, wobei der Überhang dieses Eingriffs maßlich derart gestaltet ist, daß ein Einrasten beider aus Kunststoff bestehenden Teile durch elastische Materialverformung und entsprechende Flankengestaltung ermöglicht wird. Durch diesen Eingriff zwischen der Schraubmuffe 50 und dem Absperrorgan 60 ist bei entsprechend gewählter axialer Druckkraft ein Verdrehen des Absperrorgans 60 bezüglich der Haltemutter 50 und des Halses 31 möglich.The
Der Hals 31b des Kartuschenkopfstücks 30 ist an seinem dem Absperrorgan 60 zugewandten Ende mit einem Boden 33 abgeschlossen, in welchem zwei Öffnungen 34 vorgesehen sind, wobei jede Öffnung auf einer Seite des Stegs 32b liegt und dementsprechend mit der jeweiligen Materialkammer in Verbindung steht (siehe auch Fig. 2). Ein das eigentliche Absperrorgan bildender Boden 64 des Zylinders 60 weist zu den Öffnungen 34 bezüglich Lage und Form kongruente Öffnungen 65 auf, welche in den Fig. 1 und 3 jeweils übereinanderliegend dargestellt sind; dies entspricht der Offenstellung des Absperrorgans 60.The
In Fig. 4 ist die Schließstellung des Absperrorgans 60 dargestellt. Dort ist das Absperrorgan 60 um 90° um seine Längsachse gedreht, wodurch die entsprechenden Öffnungen 34 des Kopfstücks 30 und Öffnungen 65 des Absperrorgans 60 nicht mehr kommunizieren und dadurch verschlossen sind.4 shows the closed position of the shut-off
Damit das Absperrorgan 60 in definierter Weise verdreht werden kann, wird es einer in den Fig. 5 und 6 dargestellten Zwangsführung unterworfen. Entsprechend Fig. 5 weist das Absperrorgan 60 an seinem unteren Ende zwei diametral gegenüberliegende vorstehende Anschlagnasen 66 auf, welche in entsprechenden im Boden 33 des Halses 31b eingelassenen Führungsnuten 35 (Fig. 6) eingreifen und nach entsprechender Drehung des Absperrorgans 30 an deren Begrenzungen anstoßen, so daß definierte Offen- und Schließstellungen gegeben sind.So that the shut-off
In Fig. 6 ist eine andere Ausführungsform der Koaxialkartusche mit einem erfindungsgemäßen Abschlußorgan 60 dargestellt. Einziger Unterschied zu der in Fig. 1 dargestellten Ausführungsform besteht darin, daß der kreisbogenförmige Steg 32b praktisch völlig fehlt, dafür aber der Absperrorgan-Zylinder 60 bis zur vom Kartuschenkopfstück 30 gebildeten Ebene hinabreicht. Diese Ausführungsform ist gegenüber der in Fig. 1 dargestellten aus spritzgußtechnischen Gründen bezüglich des Kopfstücks 30 zu bevorzugen.6 shows another embodiment of the coaxial cartridge with a
Statt des dargestellten Griffelements in Form eines Knebels mit zwei Flügeln 62 kann auch ein einziger seitlich vom Absperrorgan 60 wegragender Griffhebel (nicht dargestellt) Anwendung finden.Instead of the handle element shown in the form of a toggle with two
Claims (10)
- An injection-moulded multi-chamber cartridge for two- or multi-component flowable compounds, including
at least two tubular cartridge wall sections (10, 20) arranged one within the other to form at least two chambers to accommodate one material component each,
a front wall section (30) arranged at the front end of the tubular cartridge wall sections onto which a mouthpiece (31) is moulded to dispense the material components from the cartridge, connected to each chamber by an outlet moulded into the front wall section,
a piston (40) inserted into the rear end of each of the tubular cartridge wall sections to press out the material components,
characterized in that the front wall section has been moulded as a separate header (30) and the tubular cartridge wall sections (10, 20) have also been moulded as separate components,
and snap-on connections (11, 35) arranged to connect the tubular cartridge wall sections with the header. - A cartridge according to claim 1, characterized in that the snap-on connections between the header (30) and each tubular cartridge wall section (10, 20) have an annular flange (31, 32 and/or 31a, 32a) moulded to one section, an axial annular groove having an undercut (35) and a matching annular projection (11) on the other component to engage into the undercut (35) in the annular groove.
- A cartridge according to claim 2, characterized in that the annular flange has been moulded to the header (30) and the annular projection of each tubular wall section (10, 20) and the undercut (35) has been moulded to each external groove face (31 and/or 31a).
- A cartridge according to claim 2 or claim 3, characterized in that the radial expansion of the undercut (35) is within a range of several tenths of a millimetre.
- A cartridge according to one of claims 1 to 4, characterized in that a shut-off device for optional closing and/or opening of the mouthpiece has been allocated to the mouthpiece, including a shut-off device (60) which may be rotated between open and closed position, with the shut-off device including a disc (64) arranged in the mouthpiece of the cartridge laterally to the material flow, directly in front of the outlet (34) of the mouthpiece, which may be rotated around an axis parallel to the longitudinal axis of the cartridge, and with the disc (64) in turn having orifices (65) which can be positioned congruent or non-congruent with the outlets (34) of the mouthpiece by rotating the disc between open and closed position.
- A cartridge according to claim 5, characterized in that rotation of the disc (64) between open and closed position is limited by stops (35, 66) moulded to both the disc and the mouthpiece (30).
- A cartridge according to claim 5 for a two-component cartridge including two coaxial tubular cartridge wall sections, characterized in that the shut-off device has the shape of a hollow cylinder open at the front, whose base is formed by a disc (64), with a handle device (62) at its sleeve to operate the shut-off device, and a circumferential groove (63) in which the locking device (50) to guide the cylinder and to lock the same to the header (30) will engage.
- A cartridge according to claim 7, characterized in that the locking device (50) is a threaded socket (50) screwed to the neck (31b) of the header (30).
- A cartridge according to claims 7 or 8, characterized in that the hollow cylinder (60) is open at the front, is divided into two cylinder sections by a central web (61), and has a thread for screwing-on the mixing nozzle moulded to its sleeve.
- A cartridge according to one of claims 6 to 9, characterized in that the disc (64) includes two top projections (66) engaging into two recessed guide grooves (35) moulded into the header, forming at their ends a counterstop for the stop projections (66).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9102635U DE9102635U1 (en) | 1991-03-06 | 1991-03-06 | |
| DE9102636U | 1991-03-06 | ||
| DE9102636U DE9102636U1 (en) | 1991-03-06 | 1991-03-06 | |
| DE9102635U | 1991-03-06 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0502519A2 EP0502519A2 (en) | 1992-09-09 |
| EP0502519A3 EP0502519A3 (en) | 1992-12-02 |
| EP0502519B1 true EP0502519B1 (en) | 1993-12-01 |
Family
ID=25957924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92103764A Expired - Lifetime EP0502519B1 (en) | 1991-03-06 | 1992-03-05 | Cartridge for plastic masses having several components |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5301842A (en) |
| EP (1) | EP0502519B1 (en) |
| JP (1) | JPH0872945A (en) |
| DE (1) | DE59200027D1 (en) |
| ES (1) | ES2049116T3 (en) |
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| CN110352099A (en) * | 2017-02-02 | 2019-10-18 | 诺信公司 | Dual fluid cartridge component |
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| US5027981A (en) * | 1988-07-26 | 1991-07-02 | Magister Herbert K | Dispenser cartridge for two component system |
| US4969747A (en) * | 1990-01-26 | 1990-11-13 | Laurence Colin | Reverse flow dispensing mixer |
| US5115946A (en) * | 1991-02-11 | 1992-05-26 | Libit Sidney M | Squeeze bottle |
-
1992
- 1992-02-21 US US07/839,428 patent/US5301842A/en not_active Expired - Fee Related
- 1992-03-05 DE DE92103764T patent/DE59200027D1/en not_active Expired - Fee Related
- 1992-03-05 EP EP92103764A patent/EP0502519B1/en not_active Expired - Lifetime
- 1992-03-05 JP JP4083271A patent/JPH0872945A/en not_active Withdrawn
- 1992-03-05 ES ES92103764T patent/ES2049116T3/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110352099A (en) * | 2017-02-02 | 2019-10-18 | 诺信公司 | Dual fluid cartridge component |
Also Published As
| Publication number | Publication date |
|---|---|
| US5301842A (en) | 1994-04-12 |
| DE59200027D1 (en) | 1994-01-13 |
| EP0502519A3 (en) | 1992-12-02 |
| ES2049116T3 (en) | 1994-04-01 |
| EP0502519A2 (en) | 1992-09-09 |
| JPH0872945A (en) | 1996-03-19 |
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