EP0595017B1 - Extrusion tool for cartridges - Google Patents

Extrusion tool for cartridges Download PDF

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Publication number
EP0595017B1
EP0595017B1 EP93115136A EP93115136A EP0595017B1 EP 0595017 B1 EP0595017 B1 EP 0595017B1 EP 93115136 A EP93115136 A EP 93115136A EP 93115136 A EP93115136 A EP 93115136A EP 0595017 B1 EP0595017 B1 EP 0595017B1
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EP
European Patent Office
Prior art keywords
cartridge
cartridge holder
abutment
extrusion tool
holder
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
EP93115136A
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German (de)
French (fr)
Other versions
EP0595017A1 (en
Inventor
Werner Brüning
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.)
Alfred Fischbach KG Kunststoff Spritzgusswerk
Original Assignee
Alfred Fischbach KG Kunststoff Spritzgusswerk
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Publication date
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Publication of EP0595017A1 publication Critical patent/EP0595017A1/en
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Publication of EP0595017B1 publication Critical patent/EP0595017B1/en
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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
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/0005—Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like

Definitions

  • the invention relates to an extrusion tool of the type specified in the preamble of claim 1 and known from EP 0 412 198 A1.
  • EP 0 412 198 A1 describes an extrusion tool which has a mechanical or pneumatic pressing device, to which a cartridge holder is detachably fastened with a quick-release fastener.
  • the cartridge holder is tubular and has at its front end an abutment for the cartridge to be used.
  • the pressing device is actuated, while the cartridge is supported on an abutment of the cartridge holder.
  • the cartridge holder can be rotated relative to the pressing tool to replace the cartridge, thereby releasing the quick-release fastener. Then the cartridge can be removed from the rear end of the cartridge holder be taken out. Then the pusher is set aside to insert a new cartridge into the cartridge holder.
  • Another known extrusion tool has a cartridge holder which is fixedly attached to the pressing device. At the front end of the cartridge holder there are resilient tongues which are biased radially outward into the open position and form a funnel-shaped insertion opening for the cartridge to be inserted.
  • a longitudinally displaceable sleeve sits on the cartridge holder and can be pushed forward to press the resilient tongues inwards.
  • locking surfaces provided on the tongues engage over the cartridge face in order to form an abutment for supporting the cartridge during the pressing out.
  • the elastic tongues are biased inwards, but it is difficult to remove the cartridge because the tongues have to be opened.
  • the cartridge is inserted and removed through the front end of the cartridge holder.
  • the sleeve which can be moved on the cartridge holder for tensioning the tongues and for locking the cartridge forms a separate part which has to be moved after the cartridge has been inserted and which also moves before the cartridge is removed must become. Therefore, changing the cartridge requires numerous steps.
  • the invention has for its object to provide an extrusion tool that allows a quick and easy cartridge change in a few easy steps.
  • the cartridge is inserted through the front end of the cartridge holder and removed through the rear end.
  • an elastically expandable abutment that withdraws when the cartridge is inserted, but prevents the cartridge from being pulled out to the front because it snaps into place elastically over the front frame of the cartridge.
  • the abutment thus interacts with the cartridge in the manner of a ratchet, which only allows the cartridge to move into the cartridge holder, but does not move back in the opposite direction.
  • the quick-release fastener is released, the pressing device being held in one hand and the cartridge holder in the other hand. Then the cartridge is allowed to slide out of the open rear end of the cartridge holder by holding it obliquely while the pressing device is still held in the other hand. The cartridge holder can then be attached to the pressing device and locked with it without being released. While one hand is still the pushing device with the now attached to it holds the empty cartridge holder, a new cartridge can be grasped with the other free hand and inserted into the front end of the cartridge holder. When changing the cartridge, the pushing device does not need to be set aside, and there is also no need for a sliding ring or the like. to be moved on the cartridge holder.
  • the cartridge change can be carried out in a short time in a few short steps, so that the work process does not have to be interrupted for a longer time for a cartridge change.
  • the cartridge holder can be a one-piece part that is handled as a unit and has no separately operable components.
  • the cartridge holder can be manufactured easily and inexpensively and it has no operating elements.
  • extrusion tool according to the invention is shown in side view, partially in section.
  • the pressing tool has a pressing device 10 with a housing, from which a handle 11 protrudes.
  • a trigger lever 12 is movable relative to the handle 11 and can be pivoted about an axis 13. By pulling the trigger lever 12, a rod 14 is gradually advanced, which extends through the housing in the longitudinal direction and which carries a feed plate 15 at its front end.
  • the tubular cartridge holder 17 is detachably fastened with a quick-release fastener 16.
  • the cartridge holder 17 is provided at its rear end with a sleeve 18 of larger diameter, which can be plugged onto a tubular extension 19 of the housing, the plug-on movement being limited by a flange 20 of the housing.
  • the quick release fastener 16 has cooperating fastener elements 21 and 22 on the outer surface of the tubular extension 19 and on the inner surface of the sleeve 18. These locking elements are integrally formed on the respective carrier part and they work together in the manner of a bayonet lock. There are gaps between the closure elements distributed over the circumference, which enable the cartridge holder 17 to be pushed onto the tubular extension 19. During a subsequent rotation of the cartridge holder 17 relative to the pressing device 10, the locking elements 20 engage behind the locking elements 21, so that the cartridge holder 17 is firmly locked on the pressing device 10 and secured against axial pulling off.
  • the cartridge 23, which contains the pasty mass, is arranged in the tubular cartridge holder 17.
  • the cartridge 23 is open at the rear end.
  • a piston 24 is located in the cartridge for advancing the plastic mass.
  • the feed plate 20 can penetrate into this piston in order to advance the piston in the cartridge 23.
  • the cylindrical cartridge 23 has a cartridge face 25 at its front end, on which a tube attachment 26 is provided.
  • the tip of the tube extension 26 can be cut off in order to create an outlet opening for the plastic mass.
  • a spout 27 can be screwed onto the tube extension 26.
  • the peripheral wall of the cartridge is extended forward beyond the edge of the cartridge face 25 to form an edge 28 which can be supported on the axial abutment 29 of the cartridge holder 17.
  • the abutment 29 is attached to longitudinal tongues 30 of the cartridge body 17, which are separated from one another by slots.
  • These tongues 30 are resiliently biased inwards, i.e. They can be moved radially outwards against their elastic prestress, but when they are released they spring back inwards, so that the tongues endeavor to assume the state shown in the drawing or to spring a little further inwards.
  • the abutment 29 is formed by projections which protrude inward from each of the tongues 30. These projections have inclined surfaces 31 on their front sides, which form a funnel-shaped insertion opening for inserting the cartridge into the cartridge holder, and on their rear ends, which point towards the interior of the cartridge holder, locking surfaces 32, on which the projecting edge 28 of the cartridge locks.
  • the locking surfaces 32 are designed here as undercut surfaces, which prevent the tongues 30 from spreading apart when the cartridge is pressed forward and the shoulder 28 engages the locking surfaces 32.
  • the cartridge By advancing the piston 24 in the cartridge 23, the cartridge is pressed firmly against the abutment 29.
  • the cartridge holder 17 is gripped with one hand and the housing 10 of the pressing device with the other hand.
  • the quick-release fastener 16 By rotating the cartridge holder 17 relative to the housing 10, the quick-release fastener 16 is released, so that the cartridge holder 17 with the cartridge 23 can be removed from the housing 10.
  • the cartridge By tilting the cartridge holder 17, the cartridge slides out of the rear end of the cartridge holder. Then the empty cartridge holder 17 is fastened again to the pressing device 10 without the respective hands having released the pressing device 10 and the cartridge holder 17.
  • a mechanical pressing device 10 the mechanism of which is described in EP 0 412 198 A1.
  • a pneumatic pressing device can be provided, in which the piston 24 contained in the cartridge 23 is advanced by pneumatic pressure.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Abstract

The extrusion tool (injection gun) has a pistol-shaped pressing device (10) to which a tubular cartridge holder (17) is detachably attached by means of a quick-action closure. The cartridge holder (17) contains the cartridge (23), the contents of which are to be extruded (pressed out). In this arrangement, the cartridge (23) is supported on an abutment (29) at the front end of the cartridge holder (17). The abutment (29) is designed so as to be radially resilient, so that the cartridge (23) can be introduced from the front end of the cartridge holder (17). Then the abutment (29) snaps in, so that the cartridge can no longer be moved out of the front end of the cartridge holder. The cartridge is removed through the rear end after release of the quick-action closure (16). The extrusion tool allows rapid cartridge exchange without it being necessary to put down parts and subsequently pick them up again.

Description

Die Erfindung betrifft ein Auspreßwerkzeug der im Oberbegriff des Patentanspruchs 1 angegebenen und durch EP 0 412 198 A1 bekannten Art.The invention relates to an extrusion tool of the type specified in the preamble of claim 1 and known from EP 0 412 198 A1.

In EP 0 412 198 A1 ist ein Auspreßwerkzeug beschrieben, das eine mechanische oder pneumatische Drückvorrichtung aufweist, an welcher ein Kartuschenhalter mit einem Schnellverschluß lösbar befestigt ist. Der Kartuschenhalter ist rohrförmig ausgebildet und er weist an seinem vorderen Ende ein Widerlager für die einzusetzende Kartusche auf. Zum Auspressen der pastösen Masse aus der Kartusche wird die Drückvorrichtung betätigt, während die Kartusche an einem Widerlager des Kartuschenhalters abgestützt ist. Bei dem bekannten Auspreßwerkzeug kann zum Auswechseln der Kartusche der Kartuschenhalter relativ zum Drückwerkzeug gedreht werden, wodurch der Schnellverschluß gelöst wird. Dann kann die Kartusche aus dem rückwärtigen Ende des Kartuschenhalters herausgenommen werden. Dann wird die Drückvorrichtung beiseite gelegt, um eine neue Kartusche in den Kartuschenhalter einzuführen. Schließlich wird die Drückvorrichtung wieder in die Hand genommen und der mit einer Kartusche gefüllte Kartuschenhalter an dem Schnellverschluß der Drückvorrichtung befestigt. Zum Auswechseln einer Kartusche ist es also erforderlich, die Drückvorrichtung zwischenzeitlich beiseite zu legen, um mit der einen Hand den Kartuschenhalter und mit der anderen Hand die neue Kartusche zu halten, um diese in den Kartuschenhalter einzuführen.EP 0 412 198 A1 describes an extrusion tool which has a mechanical or pneumatic pressing device, to which a cartridge holder is detachably fastened with a quick-release fastener. The cartridge holder is tubular and has at its front end an abutment for the cartridge to be used. To press the pasty mass out of the cartridge, the pressing device is actuated, while the cartridge is supported on an abutment of the cartridge holder. In the known extrusion tool, the cartridge holder can be rotated relative to the pressing tool to replace the cartridge, thereby releasing the quick-release fastener. Then the cartridge can be removed from the rear end of the cartridge holder be taken out. Then the pusher is set aside to insert a new cartridge into the cartridge holder. Finally, the pressing device is picked up again and the cartridge holder filled with a cartridge is attached to the quick-release fastener of the pressing device. To replace a cartridge it is therefore necessary to put the pushing device aside in the meantime in order to hold the cartridge holder with one hand and the new cartridge with the other hand in order to insert it into the cartridge holder.

Ein anderes bekanntes Auspreßwerkzeug nach EP 0 092 607 A1 weist einen Kartuschenhalter auf, der fest an der Drückvorrichtung angebracht ist. Am vorderen Ende des Kartuschenhalters befinden sich federnde Zungen, die radial nach außen in die Öffnungsstellung vorgespannt sind und eine trichterförmige Einführöffnung für die einzusetzende Kartusche bilden. Auf dem Kartuschenhalter sitzt eine längsverschiebbare Hülse, die vorgeschoben werden kann, um die federnden Zungen einwärts zu drücken. Hierbei greifen an den Zungen vorgesehene Verriegelungsflächen über die Kartuschenbrust, um ein Widerlager zum Abstützen der Kartusche während des Auspressens zu bilden. Bei einer anderen Ausführungsform sind die elastischen Zungen nach innen vorgespannt, jedoch ist es hierbei schwierig, die Kartusche herauszunehmen, da die Zungen zwangsweise geöffnet werden müssen. Das Einsetzen und Herausnehmen der Kartusche erfolgt jeweils durch das vordere Ende des Kartuschenhalters hindurch. Die auf dem Kartuschenhalter verschiebbare Hülse zum Spannen der Zungen und zum Verriegeln der Kartusche bildet ein separates Teil, das nach dem Einsetzen der Kartusche bewegt werden muß und das vor dem Herausnehmen der Kartusche ebenfalls bewegt werden muß. Daher erfordert ein Kartuschenwechsel zahlreiche Handgriffe.Another known extrusion tool according to EP 0 092 607 A1 has a cartridge holder which is fixedly attached to the pressing device. At the front end of the cartridge holder there are resilient tongues which are biased radially outward into the open position and form a funnel-shaped insertion opening for the cartridge to be inserted. A longitudinally displaceable sleeve sits on the cartridge holder and can be pushed forward to press the resilient tongues inwards. In this case, locking surfaces provided on the tongues engage over the cartridge face in order to form an abutment for supporting the cartridge during the pressing out. In another embodiment, the elastic tongues are biased inwards, but it is difficult to remove the cartridge because the tongues have to be opened. The cartridge is inserted and removed through the front end of the cartridge holder. The sleeve which can be moved on the cartridge holder for tensioning the tongues and for locking the cartridge forms a separate part which has to be moved after the cartridge has been inserted and which also moves before the cartridge is removed must become. Therefore, changing the cartridge requires numerous steps.

Der Erfindung liegt die Aufgabe zugrunde, ein Auspreßwerkzeug zu schaffen, das einen schnellen und einfachen Kartuschenwechsel mit wenigen Handgriffen ermöglicht.The invention has for its object to provide an extrusion tool that allows a quick and easy cartridge change in a few easy steps.

Die Lösung dieser Aufgabe erfolgt erfindungsgemäß mit den im Patentanspruch 1 angegebenen Merkmalen.This object is achieved according to the invention with the features specified in claim 1.

Bei dem erfindungsgemäßen Auspreßwerkzeug wird die Kartusche durch das vordere Ende des Kartuschenhalters eingeführt und durch das rückwärtige Ende herausgenommen. Am vorderen Ende des Kartuschenhalters befindet sich ein elastisch aufweitbares Widerlager, das beim Einführen der Kartusche zurückweicht, das Herausziehen der Kartusche nach vorne jedoch verhindert, weil es über dem vorderen Rahmen der Kartusche elastisch einrastet. Das Widerlager wirkt also mit der Kartusche nach Art einer Ratsche zusammen, die nur eine Bewegung der Kartusche in den Kartuschenhalter hinein ermöglicht, jedoch keine Zurückbewegung in entgegengesetzter Richtung.In the extrusion tool according to the invention, the cartridge is inserted through the front end of the cartridge holder and removed through the rear end. At the front end of the cartridge holder there is an elastically expandable abutment that withdraws when the cartridge is inserted, but prevents the cartridge from being pulled out to the front because it snaps into place elastically over the front frame of the cartridge. The abutment thus interacts with the cartridge in the manner of a ratchet, which only allows the cartridge to move into the cartridge holder, but does not move back in the opposite direction.

Zum Herausnehmen der Kartusche aus dem Kartuschenhalter wird der Schnellverschluß gelöst, wobei die Drückvorrichtung in der einen und der Kartuschenhalter in der anderen Hand gehalten wird. Dann läßt man die Kartusche aus dem offenen rückwärtigen Ende des Kartuschenhalters durch Schräghalten herausgleiten, während die Drückvorrichtung immer noch in der anderen Hand gehalten wird. Der Kartuschenhalter kann dann, ohne daß er losgelassen wurde, wieder an die Drückvorrichtung angesetzt und mit dieser verriegelt werden. Während die eine Hand immer noch die Drückvorrichtung mit dem nunmehr daran befestigten leeren Kartuschenhalter hält, kann mit der freigewordenen anderen Hand eine neue Kartusche ergriffen und in das vordere Ende des Kartuschenhalters eingeführt werden. Bei einem Kartuschenwechsel braucht die Drückvorrichtung nicht beiseite gelegt zu werden, und es braucht auch kein Schiebering o.dgl. auf dem Kartuschenhalter bewegt zu werden. Der Kartuschenwechsel kann mit wenigen kurzen Handgriffen in kürzester Zeit durchgeführt werden, so daß der Arbeitsvorgang für einen Kartuschenwechsel nicht längere Zeit unterbrochen werden muß. Ein weiterer Vorteil besteht darin, daß der Kartuschenhalter ein einstückiges Teil sein kann, das als Einheit gehandhabt wird und keine separat zu betätigenden Komponenten aufweist. Der Kartuschenhalter kann einfach und kostengünstig hergestellt werden und er hat keinerlei Bedienungselemente.To remove the cartridge from the cartridge holder, the quick-release fastener is released, the pressing device being held in one hand and the cartridge holder in the other hand. Then the cartridge is allowed to slide out of the open rear end of the cartridge holder by holding it obliquely while the pressing device is still held in the other hand. The cartridge holder can then be attached to the pressing device and locked with it without being released. While one hand is still the pushing device with the now attached to it holds the empty cartridge holder, a new cartridge can be grasped with the other free hand and inserted into the front end of the cartridge holder. When changing the cartridge, the pushing device does not need to be set aside, and there is also no need for a sliding ring or the like. to be moved on the cartridge holder. The cartridge change can be carried out in a short time in a few short steps, so that the work process does not have to be interrupted for a longer time for a cartridge change. Another advantage is that the cartridge holder can be a one-piece part that is handled as a unit and has no separately operable components. The cartridge holder can be manufactured easily and inexpensively and it has no operating elements.

Im folgenden wird unter Bezugnahme auf die einzige Figur der Zeichnung ein Ausführungsbeispiel der Erfindung näher erläutert.In the following an embodiment of the invention will be explained with reference to the single figure of the drawing.

In der Zeichnung ist ein Auspreßwerkzeug nach der Erfindung in Seitenansicht, teilweise geschnitten, dargestellt.In the drawing, an extrusion tool according to the invention is shown in side view, partially in section.

Das Auspreßwerkzeug weist eine Drückvorrichtung 10 mit einem Gehäuse auf, von dem ein Handgriff 11 absteht. Relativ zu dem Handgriff 11 ist ein Abzugshebel 12 bewegbar, der um eine Achse 13 verschwenkt werden kann. Durch Ziehen an dem Abzugshebel 12 wird eine Stange 14 schrittweise vorbewegt, die in Längsrichtung durch das Gehäuse hindurchführt und die an ihrem vorderen Ende einen Vorschubteller 15 trägt.The pressing tool has a pressing device 10 with a housing, from which a handle 11 protrudes. A trigger lever 12 is movable relative to the handle 11 and can be pivoted about an axis 13. By pulling the trigger lever 12, a rod 14 is gradually advanced, which extends through the housing in the longitudinal direction and which carries a feed plate 15 at its front end.

An dem vorderen Ende des Gehäuses der Drückvorrichtung 10 ist mit einem Schnellverschluß 16 der rohrförmige Kartuschenhalter 17 lösbar befestigt. Der Kartuschenhalter 17 ist an seinem rückwärtigen Ende mit einer Muffe 18 größeren Durchmessers versehen, die auf einen Rohransatz 19 des Gehäuses aufgesteckt werden kann, wobei die Aufsteckbewegung durch einen Flansch 20 des Gehäuses begrenzt wird.At the front end of the housing of the pressing device 10, the tubular cartridge holder 17 is detachably fastened with a quick-release fastener 16. The cartridge holder 17 is provided at its rear end with a sleeve 18 of larger diameter, which can be plugged onto a tubular extension 19 of the housing, the plug-on movement being limited by a flange 20 of the housing.

Der Schnellverschluß 16 weist zusammenwirkende Verschlußelemente 21 und 22 an der Außenfläche des Rohransatzes 19 und an der Innenfläche der Muffe 18 auf. Diese Verschlußelemente sind dem jeweiligen Trägerteil einstückig angeformt und sie wirken nach Art eines Bajonettverschlusses zusammen. Zwischen den über den Umfang verteilten Verschlußelementen befinden sich Lücken, die es ermöglichen, den Kartuschenhalter 17 auf den Rohransatz 19 aufzuschieben. Bei einer anschließenden Drehung des Kartuschenhalters 17 relativ zur Drückvorrichtung 10 greifen die Verschlußelemente 20 hinter die Verschlußelemente 21, so daß der Kartuschenhalter 17 fest an der Drückvorrichtung 10 verriegelt und gegen axiales Abziehen gesichert wird.The quick release fastener 16 has cooperating fastener elements 21 and 22 on the outer surface of the tubular extension 19 and on the inner surface of the sleeve 18. These locking elements are integrally formed on the respective carrier part and they work together in the manner of a bayonet lock. There are gaps between the closure elements distributed over the circumference, which enable the cartridge holder 17 to be pushed onto the tubular extension 19. During a subsequent rotation of the cartridge holder 17 relative to the pressing device 10, the locking elements 20 engage behind the locking elements 21, so that the cartridge holder 17 is firmly locked on the pressing device 10 and secured against axial pulling off.

In dem rohrförmigen Kartuschenhalter 17 ist die Kartusche 23 angeordnet, die die pastöse Masse enthält. Die Kartusche 23 ist am rückwärtigen Ende offen. In der Kartusche befindet sich ein Kolben 24 zum Vortreiben der plastischen Masse. In diesen Kolben kann der Vorschubteller 20 eindringen, um den Kolben in der Kartusche 23 vorzuschieben.The cartridge 23, which contains the pasty mass, is arranged in the tubular cartridge holder 17. The cartridge 23 is open at the rear end. A piston 24 is located in the cartridge for advancing the plastic mass. The feed plate 20 can penetrate into this piston in order to advance the piston in the cartridge 23.

Die zylindrische Kartusche 23 weist an ihrem vorderen Ende eine Kartuschenbrust 25 auf, an der ein Rohransatz 26 vorgesehen ist. Die Spitze des Rohransatzes 26 kann abgeschnitten werden, um eine Austrittsöffnung für die plastische Masse zu schaffen. Auf den Rohransatz 26 kann eine Tülle 27 aufgeschraubt werden. Die Umfangswand der Kartusche ist über den Rand der Kartuschenbrust 25 hinaus nach vorne verlängert, um einen Rand 28 zu bilden, der sich an dem axialen Widerlager 29 des Kartuschenhalter 17 abstützen kann.The cylindrical cartridge 23 has a cartridge face 25 at its front end, on which a tube attachment 26 is provided. The tip of the tube extension 26 can be cut off in order to create an outlet opening for the plastic mass. A spout 27 can be screwed onto the tube extension 26. The peripheral wall of the cartridge is extended forward beyond the edge of the cartridge face 25 to form an edge 28 which can be supported on the axial abutment 29 of the cartridge holder 17.

Das Widerlager 29 ist an längslaufenden Zungen 30 des Kartuschenkörpers 17 angebracht, die durch Schlitze voneinander getrennt sind. Diese Zungen 30 sind nach innen federnd vorgespannt, d.h. sie können gegen ihre elastische Vorspannung radial nach außen bewegt werden, federn aber, wenn sie freigegeben werden, wieder nach innen, so daß die Zungen bestrebt sind, den in der Zeichnung dargestellten Zustand einzunehmen oder noch etwas weiter nach innen zu federn.The abutment 29 is attached to longitudinal tongues 30 of the cartridge body 17, which are separated from one another by slots. These tongues 30 are resiliently biased inwards, i.e. They can be moved radially outwards against their elastic prestress, but when they are released they spring back inwards, so that the tongues endeavor to assume the state shown in the drawing or to spring a little further inwards.

Das Widerlager 29 wird von Vorsprüngen gebildet, die von jeder der Zungen 30 nach innen abstehen. Diese Vorsprünge haben an ihren Vorderseiten Schrägflächen 31, die eine trichterförmige Einführungsöffnung zum Einführen der Kartusche in den Kartuschenhalter bilden, und an ihren rückwärtigen Enden, die zum Inneren des Kartuschenhalters weisen, Verriegelungsflächen 32, an denen sich der vorstehende Rand 28 der Kartusche verriegelt. Die Verriegelungsflächen 32 sind hier als hinterschnittene Flächen ausgebildet, die ein Auseinanderspreizen der Zungen 30 verhindern, wenn die Kartusche nach vorne gedrückt wird und der Ansatz 28 an den Verriegelungsflächen 32 angreift.The abutment 29 is formed by projections which protrude inward from each of the tongues 30. These projections have inclined surfaces 31 on their front sides, which form a funnel-shaped insertion opening for inserting the cartridge into the cartridge holder, and on their rear ends, which point towards the interior of the cartridge holder, locking surfaces 32, on which the projecting edge 28 of the cartridge locks. The locking surfaces 32 are designed here as undercut surfaces, which prevent the tongues 30 from spreading apart when the cartridge is pressed forward and the shoulder 28 engages the locking surfaces 32.

Durch das Vortreiben des Kolbens 24 in der Kartusche 23 wird die Kartusche fest gegen das Widerlager 29 gedrückt. Wenn der Kolben 24 seine vordere Endstellung erreicht hat und die Kartusche leer ist, wird der Kartuschenhalter 17 mit der einen und das Gehäuse 10 der Drückvorrichtung mit der anderen Hand ergriffen. Durch Drehen des Kartuschenhalters 17 relativ zum Gehäuse 10 wird der Schnellverschluß 16 gelöst, so daß der Kartuschenhalter 17 mit der Kartusche 23 von dem Gehäuse 10 abgezogen werden kann. Durch Schrägstellen des Kartuschenhalters 17 gleitet die Kartusche aus dem rückwärtigen Ende des Kartuschenhalters heraus. Dann wird der leere Kartuschenhalter 17 wieder an der Drückvorrichtung 10 befestigt, ohne daß die jeweiligen Hände die Drückvorrichtung 10 und den Kartuschenhalter 17 losgelassen hätten. Diejenige Hand, die den Kartuschenhalter 17 festgehalten hatte, wird nun losgelassen und mit dieser Hand ergreift man eine neue Kartusche 23, die nun in das vordere Ende des Kartuschenhalters 17 eingeschoben wird. Beim Einschieben stößt das rückwärtige Ende der Kartusche 23 gegen die Schrägflächen 31, wodurch die Zungen 30 auseinandergespreizt werden, so daß die Kartusche in den Kartuschenhalter eingeführt werden kann. Vor dem Einschieben der Kartusche wird der Vorschubteller 15 mit der Stange 14 zurückgezogen. Wenn die Kartusche vollständig eingeschoben ist, bewegen sich die Zungen 30 nach innen, so daß das Widerlager 29 die Kartusche am Herausbewegen nach vorne hindert. Das Widerlager schnappt also automatisch ein, ohne daß es einer Bedienung bedarf. Auf dem Kartuschenhalter 17 sind keine Bedienungs- oder Betätigungselemente vorhanden.By advancing the piston 24 in the cartridge 23, the cartridge is pressed firmly against the abutment 29. When the piston 24 has reached its front end position and the cartridge is empty, the cartridge holder 17 is gripped with one hand and the housing 10 of the pressing device with the other hand. By rotating the cartridge holder 17 relative to the housing 10, the quick-release fastener 16 is released, so that the cartridge holder 17 with the cartridge 23 can be removed from the housing 10. By tilting the cartridge holder 17, the cartridge slides out of the rear end of the cartridge holder. Then the empty cartridge holder 17 is fastened again to the pressing device 10 without the respective hands having released the pressing device 10 and the cartridge holder 17. The hand that held the cartridge holder 17 is now released and this hand is used to grip a new cartridge 23, which is now inserted into the front end of the cartridge holder 17. When inserted, the rear end of the cartridge 23 abuts against the inclined surfaces 31, as a result of which the tongues 30 are spread apart, so that the cartridge can be inserted into the cartridge holder. Before inserting the cartridge, the feed plate 15 with the rod 14 is withdrawn. When the cartridge is fully inserted, the tabs 30 move inward so that the abutment 29 prevents the cartridge from moving forward. The abutment snaps in automatically without the need for an operator. No operating or actuating elements are present on the cartridge holder 17.

Bei dem beschriebenen Ausführungsbeispiel ist eine mechanische Drückvorrichtung 10 vorhanden, deren Mechanismus in EP 0 412 198 A1 beschrieben ist. Anstelle einer mechanischen Drückvorrichtung kann auch eine pneumatische Drückvorrichtung vorgesehen sein, bei der der in der Kartusche 23 enthaltene Kolben 24 durch pneumatischen Druck vorgeschoben wird.In the exemplary embodiment described there is a mechanical pressing device 10, the mechanism of which is described in EP 0 412 198 A1. Instead of a mechanical pushing device, a pneumatic pressing device can be provided, in which the piston 24 contained in the cartridge 23 is advanced by pneumatic pressure.

Claims (5)

  1. An extrusion tool for cartridges containing pasty masses, comprising a pressing device (10) and a substantially tubular cartridge holder (17) being releasably mounted thereon by means of a quick-action closure (16), said cartridge holder being open at its rear end facing the pressing device (10) for removing a cartridge (23) contained therein, and comprising an abutment (29) for the inserted cartridge (23) at its front end,
    characterized in
    that the abutment (29) is configured such that it permits the insertion of a cartridge (23) into the front end of the cartridge holder with the abutment (29) being elastically flared outward, and locks the inserted cartridge against moving out of the front end of the cartridge holder (17) by means of the elastic restoring force.
  2. The extrusion tool according to claim 1, characterized in that the abutment (29) is provided on longitudinally extending tongues (30) which are radially elastic and inwardly biased.
  3. The extrusion tool according to claim 1 or 2, characterized in that the abutment (29) comprises outer inclined surfaces (31) being pressed apart by the cartridge (23) upon its insertion into the cartridge holder (17), and inner locking surfaces (32).
  4. The extrusion tool according to claim 2, characterized in that the locking surfaces (32) form undercuts engaging over an annular extension (28) of the cartridge (23).
  5. The extrusion tool according to one of claims 1 to 4, characterized in that the quick-action closure (16) consists of cooperating closing elements (21,22) of the pressing device (10) and the cartridge holder (17).
EP93115136A 1992-10-29 1993-09-21 Extrusion tool for cartridges Expired - Lifetime EP0595017B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4236550 1992-10-29
DE4236550A DE4236550C1 (en) 1992-10-29 1992-10-29 Extraction tool for cartridges

Publications (2)

Publication Number Publication Date
EP0595017A1 EP0595017A1 (en) 1994-05-04
EP0595017B1 true EP0595017B1 (en) 1995-12-27

Family

ID=6471662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93115136A Expired - Lifetime EP0595017B1 (en) 1992-10-29 1993-09-21 Extrusion tool for cartridges

Country Status (3)

Country Link
EP (1) EP0595017B1 (en)
AT (1) ATE132062T1 (en)
DE (2) DE4236550C1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19720442A1 (en) * 1997-05-15 1998-11-19 Martin Wundsam Method and appliance for applying glue to workpieces, especially parquet tiles or floor boards

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE26180E (en) * 1967-04-04 Dispensing gun
DE3200542A1 (en) * 1982-01-11 1983-07-21 Teroson Gmbh, 6900 Heidelberg METHOD FOR EMPTYING CARTRIDGE-LIKE CONTAINERS AND CONTAINERS FOR IMPLEMENTING THE METHOD
DE8212205U1 (en) * 1982-04-28 1982-07-01 Teroson Gmbh, 6900 Heidelberg Gun for holding a cartridge
ATE102084T1 (en) * 1989-08-11 1994-03-15 Fischbach A Kunststoff Kg PRESSING TOOL FOR CARTRIDGES.

Also Published As

Publication number Publication date
EP0595017A1 (en) 1994-05-04
ATE132062T1 (en) 1996-01-15
DE4236550C1 (en) 1993-10-07
DE59301252D1 (en) 1996-02-08

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