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EP0351358B1 - Method and apparatus to eject a substance from a cartridge - Google Patents

Method and apparatus to eject a substance from a cartridge Download PDF

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Publication number
EP0351358B1
EP0351358B1 EP89810462A EP89810462A EP0351358B1 EP 0351358 B1 EP0351358 B1 EP 0351358B1 EP 89810462 A EP89810462 A EP 89810462A EP 89810462 A EP89810462 A EP 89810462A EP 0351358 B1 EP0351358 B1 EP 0351358B1
Authority
EP
European Patent Office
Prior art keywords
cartridge
coupling part
substance
membrane
closure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89810462A
Other languages
German (de)
French (fr)
Other versions
EP0351358A2 (en
EP0351358A3 (en
Inventor
Wolfgang Dr. Saur
Robert Tonolla
Franz Taschke
Siegfried Staemmele
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.)
Dow Automotive AG
Original Assignee
Gurit Essex AG
Licentia Patent Verwaltungs GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE3823708A external-priority patent/DE3823708C2/en
Priority claimed from CH2749/88A external-priority patent/CH674949A5/en
Application filed by Gurit Essex AG, Licentia Patent Verwaltungs GmbH filed Critical Gurit Essex AG
Priority to AT89810462T priority Critical patent/ATE73692T1/en
Publication of EP0351358A2 publication Critical patent/EP0351358A2/en
Publication of EP0351358A3 publication Critical patent/EP0351358A3/en
Application granted granted Critical
Publication of EP0351358B1 publication Critical patent/EP0351358B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00553—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components
    • B05C17/00566—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components with a dynamic mixer in the nozzle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00553—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00586—Means, generally located near the nozzle, for piercing or perforating the front part of a cartridge
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/2305—Mixers of the two-component package type, i.e. where at least two components are separately stored, and are mixed in the moment of application

Definitions

  • the invention relates to a method for ejecting a substance located in a cartridge or the like according to the preamble of claim 1 and to a device for performing the method.
  • the cartridges are brought individually into operational readiness and then inserted into the device. It is often difficult to empty the cartridges.
  • the cartridges which are provided with a squeeze-out element designed as a piston crown, are also sealed with a membrane so that air can be prevented with absolute certainty during storage. An unwanted air entry would cause a premature reaction of the cartridge contents trigger.
  • This membrane which is arranged in front of the piston crown, prevents or impedes access to the ejection element.
  • the other end of the cartridge which is provided with an outlet opening, must also remain airtight until it is used. In order to put the device into use, it is therefore necessary to open both the additional membrane closure on the side of the piston-like insert and the closure on the outlet end of the cartridge for each cartridge.
  • the method proposed according to the invention has the features listed in claim 4 and the device proposed according to the invention has the features listed in claim 4.
  • units which are expediently only intended for a single use, consist of the cartridges, the connecting lines between cartridges and a mixing device and the mixing device and are no longer used after use.
  • a major advantage of the proposed device is that the cartridges, which form part of the exchangeable unit, do not have to be made ready for operation by special manipulations, since the otherwise usual puncturing of the membrane at the outlet end of the cartridge by means of a suitable mandrel and, if appropriate, the otherwise usual removal of a tear-open lid is eliminated.
  • Each cartridge is opened under pressure at the outlet end and / or at the end of the piston-like insert.
  • Corresponding closures are provided for this purpose, which can expediently be designed as a membrane, possibly with a predetermined breaking point.
  • the threaded spindle designated 1 in FIG. 1 and rotatably mounted in a gear housing (not shown), is actuated by an electric motor with the interposition of a gear driven.
  • the threaded spindle 1 is accommodated in a slide part 2, which is provided in the region of its end on the gearbox side with a spindle nut 3 which is fixedly arranged in the interior of the slide part 2, which is designed, for example, as a square hollow profile.
  • a carrier 4 is fastened, in which the rear ends of two ejector piston rods 5 and 6 lying next to one another are articulated.
  • the slide part 2 which can be set into an axial movement by means of the threaded spindle 1 via the spindle nut 3, is located in the interior of a longitudinal spar 7 formed from a square hollow profile, to which a guide 8 for the two ejection piston rods 5 and 6 and for the slide part 2 is attached.
  • the longitudinal beam 7 is fastened by means of screws to the transmission housing, not shown.
  • the carrier 4 comes to rest in the front end position of the slide part 2.
  • the guide 8 delimits two receiving chambers 10 and 11 for two cartridges 12, 13, which contain the substances to be mixed with one another, for example one component each of a two-component adhesive.
  • the bottom part of each cartridge has an ejection piston 14, 15 attached to the piston rod 5 and 6 concerned.
  • the ejection pistons 14 and 15 run on them each assigned cartridge base, which itself embodies a piston element.
  • the cartridges 12, 13 in the receiving chambers 10 and 11 are left with an axial range of motion, the meaning of which will be explained later.
  • the contents of the two cartridges 12 and 13 are each pressed into a feed line 16, 17 in the case of ejection pistons 14 and 15, each of which opens into a mixer 18, which in the exemplary embodiment is designed as a dynamic mixer.
  • the mixer 18 is driven by the shaft journal 1 'of the threaded spindle 1, which also actuates the slide part 2 via the spindle nut 3.
  • the outlet nozzle of the mixer for the two mixed components is designated 19.
  • a coupling part 20 is used to fix the cartridges 12 and 13 to the two feed lines 16 and 17 opening into the mixer head 18 '.
  • the mixer 18 forms with the mixer head 18', the feed line 16, 17 with the coupling parts 20 and the cartridges 12 and 13 a unit that is completely interchangeable.
  • the coupling part 20 which is preferably made of a plastic, contains a plunging chamber 21 with the depth t or T, which is realized by an annular gap, a hollow cutting pin 22 and a holding member 23 in the form of an open spring ring.
  • the spring ring is by two am Inner circumference of the outer wall 24 offset in the circumferential direction from each other, inwardly extending cam-shaped lugs 25, 25 'secured against axial displacement, which delimit 26 receiving groove sections 27 for the spring ring with a collar-shaped stop surface 26 located inside the wall 24.
  • the extensions 25, 25 ' extending diametrically opposite one another in the circumferential direction over the length S.
  • a nose 28 prevents the spring ring from rotating and at the same time secures it against falling out. So that the spring ring can move radially outwards when the coupling part 20 is placed on the outlet or connection piece 30 or 31 of the cartridges, slot-like openings 32, 32 'are provided in its wall behind the cam-shaped projections 25 and 25, the expansion of which in Circumferential direction corresponds approximately to that of the cam-shaped lugs 25, 25 '. The spring can deflect into these slots with appropriate radial stress.
  • the outlet connector 30 or 31 of the cartridges 12 and 13 is expediently provided with a circumferential groove 33, in which the holding member 23 (spring ring) engages in the coupling case (see FIG. 5).
  • the coupling part 20 On its end facing the feed line 16 or 17 to the mixer 18, the coupling part 20 is provided with resilient tongues 34, each of which has a radially inwardly projecting raster elevation 34 '. These grid elevations are effective in the coupling case with the leads 18 and 17 leading to the mixer head snapping into a circumferential groove 35 of these leads.
  • the coupling part 20 is secured against rotation by two stops 36 in the circumferential groove 35.
  • the front edge of the hollow cutting pin 22 is chamfered and provided with a cutting edge 37. As can be seen from FIGS. 4 and 5, this cutting edge is assigned to the closure membrane 38 of the cartridges 12 and 13, respectively.
  • the threaded spindle 1 When the drive is switched on, the threaded spindle 1 is set in rotation, as is the mixer 18 via the shaft journal 1 'of the threaded spindle.
  • the two ejection pistons 14 and 15 run onto the axially displaceable base 39 of the cartridges 12 and 13 or onto a membrane 40 upstream of the base 39, the latter bursting, each of the two cartridges 12 and 13 guides one relative to the immovable coupling part 20 Forward movement.
  • the outlet connection 30 or 31 of the respective cartridge starting from the rest position according to FIG. 4, penetrates into the immersion chamber 21 of the coupling part 20, as can be seen from FIG. 5.
  • the bottom 41 of the immersion chamber 21 of the coupling piece 20 forms a limit stop.
  • the sealing membrane 38 of the cartridges runs onto the cutting edge 37 of the hollow cutting pin 22 and is thereby incised or severed. Under the pressure of the substance to be squeezed out, the sealing membrane 38 then, after hinge-like bending, rests against the inner wall of the coupling part 20, so that the substance in the cartridge can be pressed out practically unhindered.
  • the circumferential length and configuration of the cutting edge 37 of the cutting pin 22 must be selected in accordance with the particular circumstances.
  • a circumferential length (arc length) of the cutting edge corresponding to 60 ° to 180 ° has proven to be expedient.
  • the coupling 20 is supported, if necessary additionally, on a frame part indicated in FIGS. 4 and 5 and designated by 42.
  • the union of the coupling part 20 on the one hand with the associated supply line 16 or 17 to the mixer 18 and on the other hand with the outlet connection 30 or 31 can also be carried out in a manner other than that illustrated, for example in the manner of a bayonet lock.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Package Specialized In Special Use (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Coating Apparatus (AREA)
  • Sampling And Sample Adjustment (AREA)

Description

Die Erfindung bezieht sich auf ein Verfahren zum Ausstossen einer in einer Kartusche oder dergleichen befindliche Substanz nach dem Oberbegriff des Anspruchs 1 und auf eine Einrichtung zur Durchführung des Verfahrens.The invention relates to a method for ejecting a substance located in a cartridge or the like according to the preamble of claim 1 and to a device for performing the method.

Es sind bereits motorisch angetriebene Einrichtungen bekannt geworden, z.B. aus der DE-U-8709753.2, die insbesondere zum Verkleben von Bauteilen mittels eines Zweikomponentenklebstoffs Verwendung finden, wobei die Kartuschen, welche die miteinander zu vermischenden Komponenten enthalten, mit Hilfe von Auspressorganen entleert werden. Die Komponenten gelangen in ein gemeinsames Mischorgan, in welchem sie gründlich gemischt und in Reaktion gebracht werden, wonach die gebildete Klebemasse durch eine Auftragsdüse an die Verbrauchsstelle gelangt.Motor-driven devices have already become known, e.g. from DE-U-8709753.2, which are used in particular for gluing components by means of a two-component adhesive, the cartridges containing the components to be mixed with one another being emptied with the aid of squeezing elements. The components pass into a common mixing element, in which they are thoroughly mixed and reacted, after which the adhesive mass formed reaches the point of use through an application nozzle.

In bekannter Weise werden die Kartuschen einzeln in Betriebsbereitschaft gebracht und anschliessend in die Einrichtung eingesetzt. Dabei bildet die Entleerung der Kartuschen oft Schwierigkeiten. Die mit einem als Kolbenboden ausgebildeten Auspressorgan versehenen Kartuschen sind zusätzlich noch mit einer Membrane verschlossen, damit ein Luftzutritt während der Lagerung mit absoluter Sicherheit verhindert wird. Ein ungewollter Luftzutritt würde nämlich eine vorzeitige Reaktion des Kartuscheninhalts auslösen. Diese vor dem Kolbenboden angeordnete Membrane verhindert oder erschwert den Zugang zum Auspressorgan. Das andere Kartuschenende, welches mit einer Auslassöffnung versehen ist, muss ebenfalls bis zum Gebrauch luftdicht verschlossen bleiben. Um die Einrichtung in Einsatz zu bringen, ist es also notwendig, bei jeder Kartusche sowohl den zusätzlichen Membranverschluss an der Seite des kolbenartigen Einsatzes als auch den Verschluss am Auslassende der Kartusche zu öffnen. Dieses Vorgehen war insbesondere dann erschwert, wenn die Kartuschen zusammen mit der Mischvorrichtung und den Verbindungsleitungen eine Einheit bildeten, welche als solche in die Einrichtung einfügbar sind. In diesem Falle sind insbesondere die mit Membrane verschlossenen Auslass-Enden der Kartuschen nicht oder nur schwer zugänglich, so dass oft der Anschluss der Verbindungsleitungen an die Kartuschen gelöst werden musste. Die Verwendung von aus den Kartuschen, aus den Verbindungsleitungen und der Mischvorrichtung gebildeten sogenannten Wegwerfeinheiten, die sonst sehr praktisch, sicher und arbeitssparend sind, war oft verunmöglicht.In a known manner, the cartridges are brought individually into operational readiness and then inserted into the device. It is often difficult to empty the cartridges. The cartridges, which are provided with a squeeze-out element designed as a piston crown, are also sealed with a membrane so that air can be prevented with absolute certainty during storage. An unwanted air entry would cause a premature reaction of the cartridge contents trigger. This membrane, which is arranged in front of the piston crown, prevents or impedes access to the ejection element. The other end of the cartridge, which is provided with an outlet opening, must also remain airtight until it is used. In order to put the device into use, it is therefore necessary to open both the additional membrane closure on the side of the piston-like insert and the closure on the outlet end of the cartridge for each cartridge. This procedure was particularly difficult when the cartridges together with the mixing device and the connecting lines formed a unit, which as such can be inserted into the device. In this case, the outlet ends of the cartridges, which are closed with a membrane, are not accessible or are difficult to access, so that the connection of the connecting lines to the cartridges often had to be disconnected. The use of so-called disposable units formed from the cartridges, the connecting lines and the mixing device, which are otherwise very practical, safe and labor-saving, was often impossible.

Es ist die Aufgabe der vorliegenden Erfindung, eine ein Verfahren und eine Einrichtung zu schaffen, welche die erwähnten Nachteile nicht mehr aufweist, sondern in sehr einfacher und arbeitssparender Weise auch die Verwendung von aus den Kartuschen, den Verbindungsleitungen und der Mischvorrichtung gebildeten Einheiten erlaubt, wobei das Öffnen der Kartuschen am Austrittsende sowie gegebenenfalls das Öffnen und Entfernen des Sicherheitsabschlusses am anderen Ende der Kartusche, ohne zusätzliche Manipulationen, zuverlässig erreicht wird.It is the object of the present invention to provide a method and a device which no longer has the disadvantages mentioned, but also allows the use of units formed from the cartridges, the connecting lines and the mixing device in a very simple and labor-saving manner, wherein opening the cartridges at the outlet end and, if necessary, opening and removing the Security closure at the other end of the cartridge is reliably achieved without additional manipulation.

Zur Lösung dieser Aufgabe weist das erfindungsgemäss vorgeschlagene Verfahren die im Anspruch 1 und die erfindungsgemäss vorgeschlagene Einrichtung die im Anspruch 4 aufgeführten Merkmale auf. In dieser Weise wird die Verwendung von Einheiten ermöglicht, welche zweckmässigerweise nur für einen einzigen Einsatz bestimmt sind, aus den Kartuschen, den Verbindungsleitungen zwischen Kartuschen und einer Mischvorrichtung und aus der Mischvorrichtung bestehen und nach Gebrauch nicht mehr verwendet werden.To achieve this object, the method proposed according to the invention has the features listed in claim 4 and the device proposed according to the invention has the features listed in claim 4. In this way it is possible to use units which are expediently only intended for a single use, consist of the cartridges, the connecting lines between cartridges and a mixing device and the mixing device and are no longer used after use.

Ein wesentlicher Vorteil der vorgeschlagenen Einrichtung besteht noch darin, dass die Kartuschen, welche einen Teil der auswechselbaren Einheit bilden, nicht durch spezielle Manipulationen betriebsbereit gemacht werden müssen, da das sonst übliche Durchstossen der Membran am Auslassende der Kartusche mittels eines geeigneten Dorns und gegebenenfalls die sonst übliche Entfernung eines Aufreissdeckels wegfällt. Jede Kartusche wird am Auslassende und/oder am Ende des kolbenartigen Einsatzes unter Druckeinwirkung geöffnet. Dazu sind entsprechende Verschlüsse vorgesehen, welche zweckmässigerweise als Membrane, gegebenenfalls mit Sollbruchstelle, ausgebildet sein können.A major advantage of the proposed device is that the cartridges, which form part of the exchangeable unit, do not have to be made ready for operation by special manipulations, since the otherwise usual puncturing of the membrane at the outlet end of the cartridge by means of a suitable mandrel and, if appropriate, the otherwise usual removal of a tear-open lid is eliminated. Each cartridge is opened under pressure at the outlet end and / or at the end of the piston-like insert. Corresponding closures are provided for this purpose, which can expediently be designed as a membrane, possibly with a predetermined breaking point.

Die Erfindung wird im nachstehenden anhand der Zeichnung, die ein bevorzugtes Ausführungsbeispiel schematisch veranschau licht, erläutert.The invention is described below with reference to the drawing, which schematically illustrates a preferred exemplary embodiment light, explained.

Es zeigen:

  • Fig. 1 eine Draufsicht auf eine Dosier- und Mischeinrichtung für zwei Komponenten mit durch einen Antriebsmotor betätigtem Auspresskolben und durch denselben Antrieb in Drehung versetzten Mischer,
  • Fig. 2 eine Seitenansicht des Kupplungsteils zwischen den Austrittsstutzen der Kartuschen und der Zuleitung zum Mischer im Schnitt,
  • Fig. 3 eine Ansicht des Kupplungsteils gemäss Fig. 2 in Richtung A,
  • Fig. 4 eine Seitenansicht des mit dem Austrittsstutzen einer Kartusche vereinigten Kupplungsteils im Schnitt, wobei dem in der Ausgangslage befindlichen Kartuschenboden eine Membran vorgeordnet ist,
  • Fig. 5 eine Ansicht entsprechend Fig. 4, jedoch mit bereits vorwärtsbewegtem Auspresskolben.
Show it:
  • 1 is a plan view of a metering and mixing device for two components with a squeeze piston actuated by a drive motor and a mixer set in rotation by the same drive,
  • 2 is a side view of the coupling part between the outlet nozzle of the cartridges and the feed line to the mixer in section,
  • 3 shows a view of the coupling part according to FIG. 2 in direction A,
  • 4 shows a side view of the coupling part combined with the outlet connector of a cartridge, a membrane being arranged upstream of the cartridge base in the starting position,
  • Fig. 5 is a view corresponding to Fig. 4, but with the ejection piston already moved forward.

Die in Figur 1 mit 1 bezeichnete, drehbar in einem nicht dargestellten Getriebegehäuse gelagerte Gewindespindel wird unter Zwischenschaltung eines Getriebes durch einen Elektromotor an getrieben. Die Gewindespindel 1 ist in einem Schlittenteil 2 untergebracht, das im Bereich seines getriebeseitig liegenden Endes mit einer Spindelmutter 3 versehen ist, die fest im Innern des beispielsweise als Vierkant-Hohlprofil ausgebildeten Schlittenteils 2 angeordnet ist. Am anderen Ende des Schlittenteils 2 ist ein Träger 4 befestigt, in dem die rückwärtigen Enden zweier nebeneinander liegender Ausstosskolbenstangen 5 und 6 gelenkig gelagert sind. Das durch die Gewindespindel 1 über die Spindelmutter 3 in eine Axialbewegung versetzbare Schlittenteil 2 befindet sich im Innern eines aus einem Vierkant-Hohlprofil gebildeten Längsholms 7, an dem eine Führung 8 für die beiden Ausstosskolbenstangen 5 und 6 sowie für das Schlittenteil 2 angebracht ist. Der Längsholm 7 ist mittels Schrauben am nicht dargestellten Getriebegehäuse befestigt. An einem in der rückwärtigen Stirnseite der Gewindespindel 1 eingeschraubten Anschlag 9 kommt der Träger 4 in der vorderen Endlage des Schlittenteils 2 zu Anlage.The threaded spindle, designated 1 in FIG. 1 and rotatably mounted in a gear housing (not shown), is actuated by an electric motor with the interposition of a gear driven. The threaded spindle 1 is accommodated in a slide part 2, which is provided in the region of its end on the gearbox side with a spindle nut 3 which is fixedly arranged in the interior of the slide part 2, which is designed, for example, as a square hollow profile. At the other end of the slide part 2, a carrier 4 is fastened, in which the rear ends of two ejector piston rods 5 and 6 lying next to one another are articulated. The slide part 2, which can be set into an axial movement by means of the threaded spindle 1 via the spindle nut 3, is located in the interior of a longitudinal spar 7 formed from a square hollow profile, to which a guide 8 for the two ejection piston rods 5 and 6 and for the slide part 2 is attached. The longitudinal beam 7 is fastened by means of screws to the transmission housing, not shown. At a stop 9 screwed into the rear end face of the threaded spindle 1, the carrier 4 comes to rest in the front end position of the slide part 2.

Die Führung 8 grenzt zwei Aufnahmekammern 10 und 11 für zwei Kartuschen 12, 13 ab, welche die miteinander zu mischenden Substanzen, zum Beispiel je eine Komponente eines Zweikomponentenklebers, enthalten. Dem Bodenteil jeder Kartusche ist ein auf der betreffenden Kolbenstange 5 und 6 angebrachter Ausstosskolben 14, 15 zugeordnet.The guide 8 delimits two receiving chambers 10 and 11 for two cartridges 12, 13, which contain the substances to be mixed with one another, for example one component each of a two-component adhesive. The bottom part of each cartridge has an ejection piston 14, 15 attached to the piston rod 5 and 6 concerned.

Beim Einschalten des Antriebs des Elektrowerkzeugs bzw. der Einrichtung laufen die Ausstosskolben 14 und 15 auf den ihnen jeweils zugeordneten Kartuschenboden auf, der selbst ein Kolbenelement verkörpert. Den Kartuschen 12, 13 in den Aufnahmekammern 10 und 11 ist ein axialer Bewegungsspielraum belassen, dessen Bedeutung später erläutert wird.When the drive of the power tool or the device is switched on, the ejection pistons 14 and 15 run on them each assigned cartridge base, which itself embodies a piston element. The cartridges 12, 13 in the receiving chambers 10 and 11 are left with an axial range of motion, the meaning of which will be explained later.

Der Inhalt der beiden Kartuschen 12 und 13 wird bei eine Vorschubbewegung ausführenden Ausstosskolben 14 und 15 jeweils in eine Zuleitung 16, 17 gepresst, von denen jede in einen Mischer 18 mündet, der beim Ausführungsbeispiel als dynamischer Mischer ausgebildet ist. Der Mischer 18 wird dabei vom Wellenzapfen 1′ der Gewindespindel 1 angetrieben, die auch das Schlittenteil 2 über die Spindelmutter 3 betätigt. Die Austrittsdüse des Mischers für die beiden vermischten Komponenten ist mit 19 bezeichnet.The contents of the two cartridges 12 and 13 are each pressed into a feed line 16, 17 in the case of ejection pistons 14 and 15, each of which opens into a mixer 18, which in the exemplary embodiment is designed as a dynamic mixer. The mixer 18 is driven by the shaft journal 1 'of the threaded spindle 1, which also actuates the slide part 2 via the spindle nut 3. The outlet nozzle of the mixer for the two mixed components is designated 19.

Zur Fixierung der Kartuschen 12 und 13 an den beiden in den Mischerkopf 18′ einmündenden Zuleitungen 16 und 17 dient jeweils ein Kupplungsteil 20. Im Kupplungsfall bilden der Mischer 18 mit dem Mischerkopf 18′, die Zuleitung 16, 17 mit den Kupplungsteilen 20 und die Kartuschen 12 und 13 eine Einheit, die komplett auswechselbar ist.A coupling part 20 is used to fix the cartridges 12 and 13 to the two feed lines 16 and 17 opening into the mixer head 18 '. In the coupling case, the mixer 18 forms with the mixer head 18', the feed line 16, 17 with the coupling parts 20 and the cartridges 12 and 13 a unit that is completely interchangeable.

Wie die Figuren 2 und 3 zeigen, enthält das vorzugsweise aus einem Kunststoff bestehende Kupplungsteil 20 eine durch einen Ringspalt verwirklichte Eintauchkammer 21 mit der Tiefe t bzw. T, einen hohlen Schneidzapfen 22 und ein Halteglied 23 in Form eines offenen Federrings. Der Federring ist dabei durch zwei am Innenumfang der Aussenwandung 24 in Umfangsrichtung gegeneinander versetzt angebrachte, sich nach innen erstreckende nockenförmige Ansätze 25, 25′ gegen Axialverschiebung gesichert, die mit einer im Innern der Wandung 24 befindlichen bundförmigen Anschlagfläche 26 Aufnahmenutabschnitte 27 für den Federring abgrenzen.As FIGS. 2 and 3 show, the coupling part 20, which is preferably made of a plastic, contains a plunging chamber 21 with the depth t or T, which is realized by an annular gap, a hollow cutting pin 22 and a holding member 23 in the form of an open spring ring. The spring ring is by two am Inner circumference of the outer wall 24 offset in the circumferential direction from each other, inwardly extending cam-shaped lugs 25, 25 'secured against axial displacement, which delimit 26 receiving groove sections 27 for the spring ring with a collar-shaped stop surface 26 located inside the wall 24.

Beim Ausführungsbeispiel liegen die sich in Umfangsrichtung über die Länge S erstreckenden Ansätze 25, 25′ einander diametral gegenüber. Eine Nase 28 verhindert eine Umlaufbewegung des Federrings und sichert diesen zugleich gegen Herausfallen. Damit der Federring beim Aufsetzen des Kupplungsteils 20 auf den Austritts- bzw. Anschlussstutzen 30 bzw. 31 der Kartuschen radial nach aussen ausweichen kann, sind in seiner Wandung hinter den nockenförmigen Ansätzen 25 und 25′ schlitzförmige Durchbrüche 32, 32′ angebracht, deren Ausdehnung in Umfangsrichtung etwa derjenigen der nockenförmigen Ansätze 25, 25′ entspricht. In diese Schlitze hinein kann die Feder bei entsprechender radialer Beanspruchung ausweichen. Der Austrittsstutzen 30 bzw. 31 der Kartuschen 12 und 13 ist dabei zweckmässigerweise mit einer Umfangsnut 33 versehen, in welche das Halteglied 23 (Federring) im Kupplungsfall eingreift (siehe hierzu Figur 5).In the embodiment, the extensions 25, 25 'extending diametrically opposite one another in the circumferential direction over the length S. A nose 28 prevents the spring ring from rotating and at the same time secures it against falling out. So that the spring ring can move radially outwards when the coupling part 20 is placed on the outlet or connection piece 30 or 31 of the cartridges, slot-like openings 32, 32 'are provided in its wall behind the cam-shaped projections 25 and 25, the expansion of which in Circumferential direction corresponds approximately to that of the cam-shaped lugs 25, 25 '. The spring can deflect into these slots with appropriate radial stress. The outlet connector 30 or 31 of the cartridges 12 and 13 is expediently provided with a circumferential groove 33, in which the holding member 23 (spring ring) engages in the coupling case (see FIG. 5).

An seinem der Zuleitung 16 bzw. 17 zum Mischer 18 zugewandten Stirnseite ist das Kupplungsteil 20 mit federnden Zungen 34 versehen, die jeweils eine radial nach innen ragende Rasterhebung 34′ besitzen. Diese Rasterhebungen greifen im Kupplungsfall mit den zum Mischerkopf 18′ führenden Zuleitungen 16 bzw. 17 einrastend in eine Umfangsnut 35 dieser Zuleitungen ein. Durch zwei Anschläge 36 in der Umfangsnut 35 ist das Kupplungsteil 20 gegen Verdrehen gesichert.On its end facing the feed line 16 or 17 to the mixer 18, the coupling part 20 is provided with resilient tongues 34, each of which has a radially inwardly projecting raster elevation 34 '. These grid elevations are effective in the coupling case with the leads 18 and 17 leading to the mixer head snapping into a circumferential groove 35 of these leads. The coupling part 20 is secured against rotation by two stops 36 in the circumferential groove 35.

Die Frontkante des hohlen Schneidzapfens 22 ist abgeschrägt und mit einer Schneide 37 versehen. Diese Schneide ist, wie aus den Figuren 4 und 5 ersichtlich ist, der Verschlussmembran 38 der Kartuschen 12 bzw. 13 zugeordnet.The front edge of the hollow cutting pin 22 is chamfered and provided with a cutting edge 37. As can be seen from FIGS. 4 and 5, this cutting edge is assigned to the closure membrane 38 of the cartridges 12 and 13, respectively.

Die Verfahrensweise zur ganzen oder teilweisen Beseitigung der Verschlussmembran 38 zwecks Freigabe des Ausströmkanals aus den Kartuschen 12 und 13 zu den zum Mischer 18 führenden Zuleitungen 16 und 17 ist wie folgt:The procedure for completely or partially removing the sealing membrane 38 to release the outflow channel from the cartridges 12 and 13 to the feed lines 16 and 17 leading to the mixer 18 is as follows:

Beim Einschalten des Antriebs wird die Gewindespindel 1 in Drehung versetzt, desgleichen der Mischer 18 über den Wellenzapfen 1′ der Gewindespindel. Beim Auflaufen der beiden Ausstosskolben 14 und 15 auf den axial verschiebbaren Boden 39 der Kartuschen 12 und 13 bzw. auf eine dem Boden 39 vorgelagerte Membran 40, wobei die letztere zerplatzt, führt jeder der beiden Kartuschen 12 und 13 relativ zum jeweils unverschiebbaren Kupplungsteil 20 eine Vorwärtsbewegung aus. Dabei dringt der Austrittsstutzen 30 bzw. 31 der jeweiligen Kartusche ausgehend von der Ruhelage gemäss Fig. 4 in die Eintauchkammer 21 des Kupplungsteils 20 ein, wie dies aus Fig. 5 ersichtlich ist. Der Boden 41 der Eintauchkammer 21 des Kupplungsstücks 20 bildet dabei eine Anschlagbegrenzung.When the drive is switched on, the threaded spindle 1 is set in rotation, as is the mixer 18 via the shaft journal 1 'of the threaded spindle. When the two ejection pistons 14 and 15 run onto the axially displaceable base 39 of the cartridges 12 and 13 or onto a membrane 40 upstream of the base 39, the latter bursting, each of the two cartridges 12 and 13 guides one relative to the immovable coupling part 20 Forward movement. The outlet connection 30 or 31 of the respective cartridge, starting from the rest position according to FIG. 4, penetrates into the immersion chamber 21 of the coupling part 20, as can be seen from FIG. 5. The bottom 41 of the immersion chamber 21 of the coupling piece 20 forms a limit stop.

Während dieser Relativbewegung Kartuschen 12, 13 - Kupplungsstück 20 läuft die Verschlussmembran 38 der Kartuschen jeweils auf die Schneide 37 des hohlen Schneidzapfens 22 auf und wird dadurch eingeritzt bzw. durchtrennt. Unter dem Druck der auszupressenden Substanz legt sich dann die Verschlussmembran 38 nach scharnierartigem Umbiegen an die Innenwandung des Kupplungsteils 20 an, so dass die in der Kartusche befindliche Substanz praktisch unbehindert herausgepresst werden kann.During this relative movement of cartridges 12, 13 - coupling piece 20, the sealing membrane 38 of the cartridges runs onto the cutting edge 37 of the hollow cutting pin 22 and is thereby incised or severed. Under the pressure of the substance to be squeezed out, the sealing membrane 38 then, after hinge-like bending, rests against the inner wall of the coupling part 20, so that the substance in the cartridge can be pressed out practically unhindered.

Die Umfangslänge und Ausgestaltung der Schneide 37 des Schneidzapfens 22 ist den jeweiligen Gegebenheiten entsprechend zu wählen. Eine 60° bis 180° entsprechende Umfangslänge (Bogenlänge) der Schneidkante hat sich als zweckmässig erwiesen.The circumferential length and configuration of the cutting edge 37 of the cutting pin 22 must be selected in accordance with the particular circumstances. A circumferential length (arc length) of the cutting edge corresponding to 60 ° to 180 ° has proven to be expedient.

Die Kupplung 20 stützt sich dabei, gegebenenfalls zusätzlich, an einem in den Figuren 4 und 5 angedeuteten und mit 42 bezeichneten Gestellteil ab. Die Vereinigung des Kupplungsteils 20 einerseits mit der zugehörigen Zuleitung 16 bzw. 17 zum Mischer 18 und andererseits mit dem Austrittsstutzen 30 bzw. 31 kann auch auf eine andere als die veranschaulichte Weise erfolgen, beispielsweise nach Art eines Bajonettverschlusses.The coupling 20 is supported, if necessary additionally, on a frame part indicated in FIGS. 4 and 5 and designated by 42. The union of the coupling part 20 on the one hand with the associated supply line 16 or 17 to the mixer 18 and on the other hand with the outlet connection 30 or 31 can also be carried out in a manner other than that illustrated, for example in the manner of a bayonet lock.

Claims (15)

1. Method for ejecting a substance contained in a cartridge or the like, which in the initial state of the cartridge is prevented from flowing out by a closure member located in its outlet connection, characterised in that the closure member (38) is severed by a relative movement between the cartridge (12, 13) and a coupling part (20) connected to its outlet connection (30, 31), by means of a cutting member (22) provided in the coupling part, at least to such an extent that as a result of the pressure exerted on the closure member by the substance located in the cartridge (12, 13) at the beginning of the ejection operation, the closure member (38) completely or partly clears the flow path for this substance.
2. Method according to Claim 1, characterised in that the cartridge (12, 13) is displaced relative to the coupling part (20).
3. Method according to Claim 1, characterised in that the cartridge (12, 13) is rotated relative to the coupling part (20).
4. Apparatus for carrying out the method according to Claim 1, characterised in that it comprises a coupling part (20) connected to the outlet connection (30, 31) of the cartridge (12, 13), with an insertion chamber (21), a cutting member (22) and a holding member (23) for the outlet connection (30, 31), the depth of the insertion chamber (21) being dimensioned so that the cartridge (12, 13) is able to slide under the action of a pushing force relative to the coupling part (20) by such an extent that the closure member (38) of the cartridge encounters the cutting member (22) during its feed movement and is thus severed to such an extent that the closure member (38) no longer withstands the pressure of the substance to be ejected and arrives in a position clearing a flow cross-section for the substance.
5. Apparatus according to Claim 4, characterised in that the closure member is formed by a closure membrane (38).
6. Apparatus according to Claim 5, characterised in that the closure membrane (38) has a predetermined breaking point.
7. Apparatus according to Claim 6, characterised in that the predetermined breaking point is formed by a circular groove.
8. Apparatus according to Claim 5, characterised in that the cutting member (22) is constructed as a hollow cutting lug, which is dimensioned and designed so that the closure membrane (38) remains connected mechanically to the wall of the outlet connection (30, 31) of the cartridge in a limited region, this connecting point forming a hinge-like axis of rotation for the closure membrane (38), which bears against the inner wall of the hollow cutting lug under the action of the substance flowing out.
9. Apparatus according to Claim 8, characterised in that relative to a plane extending transversely with respect to the longitudinal axis of the cartridge, the cutting edge (37) of the hollow cutting lug extends obliquely, in which case the angle of slope may be positive or negative.
10. Apparatus according to Claims 4 to 9, characterised in that on its end side facing the cartridge, the coupling part (20) comprises at least two cam-shaped projections (25, 25′) staggered with respect to each other in the peripheral direction, which extend radially inwards by a certain angle in the peripheral direction and so far axially rearwards that together with a collar-shaped stop face (26) in the inside of the wall (24) of the coupling part, they define receiving groove sections (27) for a holding member (23) constructed as a spring ring, with which are associated openings (32, 32′) located in the wall in the region behind the cam-shaped projections (25, 25′), for its radial deflection.
11. Apparatus according to Claim 10, characterised in that the coupling part (20) comprises resilient tongues (34), which are provided with locking projections (34′), which when joined to the supply line (16 or 17) leading to the outlet nozzle (19), engage in a locking manner in a peripheral groove (35) of the respective supply line.
12. Apparatus according to Claim 11, characterised in that the coupling part (20) and the supply tine (16, 17) are prevented from rotating by stops (36) located in the peripheral groove (35) of the supply line.
13. Apparatus according to one of Claims 4 to 12, characterised in that the outlet nozzle (19) follows a dynamic mixer (18), into which open two supply lines (16, 17) for two substances to be mixed together.
14. Apparatus according to Claim 13, characterised in that the mixer (18) and the ejection piston (14, 15) are driven by a single drive motor and a transmission following the latter.
15. Apparatus according to one of Claims 4 to 14, characterised in that located in front of the base (39) of the cartridges (12, 13) is a membrane (40) which bursts on encountering the ejection piston (14, 15) and that located in the space between the cartridge base and the membrane is a material absorbing moisture.
EP89810462A 1988-07-13 1989-06-15 Method and apparatus to eject a substance from a cartridge Expired - Lifetime EP0351358B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89810462T ATE73692T1 (en) 1988-07-13 1989-06-15 METHOD FOR EJECTING A SUBSTANCE CONTAINED IN A CARTRIDGE AND EQUIPMENT FOR CARRYING OUT THE METHOD.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3823708A DE3823708C2 (en) 1988-07-13 1988-07-13 Motor-driven device for dosing and mixing at least two substances
DE3823708 1988-07-13
CH2749/88 1988-07-19
CH2749/88A CH674949A5 (en) 1988-07-19 1988-07-19 Dispenser and mixer for reaction multicomponent substance

Publications (3)

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EP0351358A2 EP0351358A2 (en) 1990-01-17
EP0351358A3 EP0351358A3 (en) 1990-04-04
EP0351358B1 true EP0351358B1 (en) 1992-03-18

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EP89810462A Expired - Lifetime EP0351358B1 (en) 1988-07-13 1989-06-15 Method and apparatus to eject a substance from a cartridge

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US (1) US4986443A (en)
EP (1) EP0351358B1 (en)
JP (1) JPH0257591A (en)
AU (1) AU613501B2 (en)
CA (1) CA1321372C (en)
DE (1) DE58900981D1 (en)
ES (1) ES2029752T3 (en)

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Also Published As

Publication number Publication date
ES2029752T3 (en) 1992-09-01
CA1321372C (en) 1993-08-17
EP0351358A2 (en) 1990-01-17
AU3718689A (en) 1990-01-18
EP0351358A3 (en) 1990-04-04
DE58900981D1 (en) 1992-04-23
JPH0257591A (en) 1990-02-27
US4986443A (en) 1991-01-22
AU613501B2 (en) 1991-08-01

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