EP1392450A1 - Expressing device for a coaxial cartridge - Google Patents

Expressing device for a coaxial cartridge

Info

Publication number
EP1392450A1
EP1392450A1 EP02791828A EP02791828A EP1392450A1 EP 1392450 A1 EP1392450 A1 EP 1392450A1 EP 02791828 A EP02791828 A EP 02791828A EP 02791828 A EP02791828 A EP 02791828A EP 1392450 A1 EP1392450 A1 EP 1392450A1
Authority
EP
European Patent Office
Prior art keywords
inner tube
ejection device
coaxial cartridge
tube
coaxial
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02791828A
Other languages
German (de)
French (fr)
Other versions
EP1392450B1 (en
Inventor
Nikolaus Brugner
Rolf Heusser
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.)
Sulzer Chemtech AG
Original Assignee
Sulzer Chemtech AG
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
Family has litigation
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Application filed by Sulzer Chemtech AG filed Critical Sulzer Chemtech AG
Publication of EP1392450A1 publication Critical patent/EP1392450A1/en
Application granted granted Critical
Publication of EP1392450B1 publication Critical patent/EP1392450B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B05C17/01—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
    • B05C17/0106—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 with means for longitudinally cutting container walls during relative displacement of the piston and its cooperating 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
    • B05C17/00553—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
    • B05C17/00553—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
    • B05C17/00559—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 the different components being stored in coaxial chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/001—Cutting tubes longitudinally
    • 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
    • B05C17/00576—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 characterised by the construction of a piston as pressure exerting means, or of the co-operating container
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means

Definitions

  • the invention relates to an ejection device for a coaxial cartridge according to the preamble of claim 1 and a coaxial cartridge with such an ejection device according to the preamble of claim 14.
  • Coaxial cartridges of the type mentioned are widely used for the storage and processing of reactive adhesives, sealing compounds and the like. They usually have an outer tube and an inner tube coaxial therewith, which delimit an inner and outer receiving chamber for the different components.
  • special extraction stamps must be provided.
  • the commercially available standard dispensing guns have only one press ram that would stand on the inner tube and prevent it from being squeezed out. Therefore, a specially designed push-out punch must be used, which consists of a central press punch and an outer press punch designed as a tube.
  • the ejection stamp takes up about half of the space available in a standard dosing gun for holding the cartridge and ejection stamp, so that the filling volume of such coaxial cartridges must be limited to half compared to the commercially available one-component cartridges.
  • the object of the invention is to provide an ejecting device and a coaxial cartridge of the type mentioned at the outset, which enable the filling volume of the coaxial cartridges which can be expressed with commercially available metering guns to be increased.
  • the concept according to the invention consists in that the inner tube of a coaxial cartridge is separated from one another by a separating device when the coaxial cartridge is pressed out, and is bent over onto the inner wall of the outer tube.
  • a specially designed squeezing device which contains a separating device for separating the inner tube and a deflecting device for deflecting the at least one cut pipe section to the inner wall of the outer pipe.
  • This push-out device can be designed as a separate component or can also be integrated in the sealing piston of the cartridge.
  • the separating device contains two cutting elements through which the inner tube is divided into approximately two halves of equal size.
  • the separating device can also have only one or more than two cutting elements for separating the inner tube.
  • the cutting element is expediently a plastic blade which is made in one piece with the ejection device produced as a plastic injection-molded part.
  • the cutting element can, however, also be a plastic blade molded as an individual part, which is mounted in the ejection device.
  • Metal cutting blades can also be used for harder cartridge materials. Metal things are preferably integrated as inserts in the ejection device produced by injection molding technology.
  • the cutting elements are advantageously mounted in such a way that they cut the inner tube not at a right angle to the tube wall, but at an angle. This can reduce the cutting resistance.
  • the cutting blades are preferably arranged at an angle of 45-60 ° to a tangent to a guide piece of the ejection device that fits into the inner tube.
  • the deflection device expediently consists of conical deflection surfaces and / or inclined guide surfaces, through which the cut sections of the inner tube are directed to lateral slots and are guided past the press ram of the metering gun or the like.
  • the split inner tube wall is bent by the deflection surfaces and the lateral slots and pressed against the inner wall of the outer tube.
  • the plunger of a conventional dosing gun for one-component cartridges has enough space to get past the inner tube that has been cut open and bent to the side and to press the sealing pistons forward using the ejection device.
  • the inner part of the push-out device preferably extends continuously from the front guide part fitting into the inner tube to the rear end. This places the inner tube under tension, which makes cutting easier.
  • V-shaped notches can be provided at the end of the inner tube.
  • the ejection device is preferably preassembled in the coaxial cartridge.
  • the inner tube of the cartridge is expediently shortened by the length of the ejection device, so that the ejection device is covered by the outer tube and the ejection device is guided through the outer tube when the cartridge begins to be pressed out.
  • Centering aids are preferably provided on the end of the push-out device facing the press ram of the metering gun for the central arrangement of the press ram with respect to the push-out device. This ensures that the separated inner tube areas can slide past the press ram safely.
  • one or more additional deflectors are provided, by means of which one end of the at least one cut-open section of the inner tube is pressed inwards and / or the other end is pressed outwards.
  • the sections accumulate less in the area of the Tre nstelle so that the separation easier and the cutting resistance is reduced.
  • Figure 1 is a partial view of a two-component coaxial cartridge with piston, ram and an ejection device according to the invention in section;
  • Figure 2 is a plan view of the part facing the piston of a second embodiment of an ejection device according to the invention.
  • FIG. 3 shows a perspective view of the part of the ejection device shown in FIG. 2 facing the piston;
  • FIG. 4 shows a perspective view of the part of the ejection device shown in FIG. 2 facing the press ram;
  • FIG. 5 shows a plan view of the part of a third embodiment of an ejection device according to the invention facing the piston;
  • Figure 6 is a sectional view taken along line A-A of Figure 5 and
  • FIG. 7 shows a perspective view of the part of a second exemplary embodiment of a device for opening the inner tube of a 1: 1 coaxial cartridge and facing the piston
  • FIG. 8 shows a further embodiment of an ejection device in a sectional view along the line A-A of FIGS. 9 and
  • FIG. 9 shows a plan view of the part of the embodiment of an ejection device shown in FIG. 8 facing the piston.
  • FIG. 1 schematically shows part of a two-component coaxial cartridge 1 with an outer tube 2 and an inner tube 3 concentric with it.
  • the inner tube 3 forms an inner chamber 4, in which a central inner piston 5 is slidably arranged.
  • an outer annular chamber 6 is delimited, in which an annular outer piston 7 is slidably arranged.
  • the inner chamber 4 and the outer annular chamber 6 serve to accommodate material components to be distributed, which by moving the two pistons 5 and 7 by means of a Press ram 8 exit a commercially available metering gun or the like at a cartridge outlet opening (not shown).
  • a squeezing device explained in more detail below is arranged.
  • the ejection device shown in cross section in FIG. 1 is designed in the form of a plunger with a cylindrical outer wall 9 and a conically widening inner part 10.
  • the outer diameter of the outer wall 9 is slightly smaller than the inner diameter of the outer tube 2.
  • the inner part 10 has at its piston-side front end a fitting in the inner tube 3 central guide piece 11, which has an oval cross section in the embodiment shown.
  • Conical deflecting surfaces 12 extend from the guide piece 11 to two opposite outlet slots 13, which are arranged in the region of the outer wall 9 at the rear end of the tappet pointing towards the press ram 8.
  • two opposite connecting webs are arranged, each with an upper edge 14 set back with respect to the guide piece 11 and guide surfaces 15 sloping on both sides.
  • the inner part 10 is designed as a hollow part with a plurality of through bores 17 which are spaced at equal angles and are circular segment-shaped in cross section.
  • the inner tube 3 is cut by the two cutting blades 16 when the ejection device is pressed in by means of the punch 8.
  • the separated sections 18 of the inner tube 3 are guided via the guide surfaces 15 and the conical deflection surfaces 12 of the inner part 10 to the two outlet slots 13 and are guided through this past the press ram 8.
  • FIGS. 2 to 4 show a further embodiment of an ejection device.
  • This embodiment differs from the exemplary embodiment shown in FIG. 1 only in that the cutting blades 16 are not offset on a common axis running through the center of the guide part 11, but offset parallel to one another at an angle ⁇ of less than 90 °, preferably between 45 and 60 °, are arranged opposite a tangent 19 to the guide part 11.
  • the one another corresponding parts are therefore provided with the same reference numerals.
  • conical deflection surfaces 12 run from the oval guide part 11 fitting into the inner tube to the outlet slots 13, which are arranged opposite one another on the edge of the outer wall 9.
  • the cutting blades 16 are arranged on the upper edges 14 of two offset connecting webs with obliquely or curved guide surfaces 15.
  • FIGS. 5 to 7 show a further exemplary embodiment of an ejection device which is intended for a 1: 1 two-component coaxial cartridges with the same holding volume of the inner and outer chamber.
  • the diameter of the guide piece 11 executed here with a circular cross section is adapted to the correspondingly larger inner diameter of the inner tube.
  • the cutting blades 16 are arranged on the upper edge 14 of a connecting web between the inner guide part 11 and the outer wall 9 and the sections separated by the cutting blades 16 are replaced by conical deflection surfaces 12 and curved or inclined guide surfaces
  • the cutting blades 16 which are bevelled on the upper side, are arranged diametrically opposite one another on a central axis 22 running through the center of the ejection device.
  • FIGS. 8 and 9 Another embodiment of an ejection device is shown in FIGS. 8 and 9.
  • the ejection device has a cylindrical outer wall 9 and an inner part 10 which widens conically in the direction of the press ram.
  • the inner part 10 also comprises a central guide piece 11 which fits into the inner tube 3 of a coaxial cartridge 1 and from which conical deflection surfaces 12 extend to two opposite outlet slots 13.
  • connecting webs with an upper edge 14 and guide surfaces 15 sloping towards both sides are provided.
  • the upper edges 14 are here as cutting edges formed and form the separating device for separating the inner tube 3 into two sections 23 and 24.
  • first deflectors 25 arranged on opposite sides of the edges 14 in the form of outwards molded projections.
  • This deflector 25 pushes one end of the cut gates 23 and 24 of the inner tube 3 radially outward in the region of the edge 14.
  • second deflectors 26 are optionally provided on the other side of the edges 14, by means of which the ends of the other wall section 23 or 24 of the inner tube 3 opposite the inwardly bent ends are pressed radially inwards.
  • diametrically opposite indentations 27 are provided for receiving the pressed-in ends of the sections 23 and 24. The ends of the cut sections 23 and 24 are thus pressed apart in the region of the cutting edge and are less likely to compress each other. In this way, the cutting process is less hindered and the cutting resistance is reduced.
  • the pushing-out devices described above are expediently produced as injection molded parts.
  • the cutting blades can be made in one piece with the injection molded part as plastic blades. But they can also be solidly injected or replaceable metal cutting blades into the injection molded part.
  • the invention is not limited to the exemplary embodiments described above and shown in the drawing.
  • the ejection device can be used for all standard coaxial cartridges with all filling volume ratios of the inner and outer chamber by appropriate dimensioning of the outer wall and the inner part.

Abstract

An expressing device for a coaxial cartridge with an outer tube and an inner tube. In order to increase the filling volume of coaxial cartridges that can be expressed with commercially available metering guns, the expressing device is provided with a separating device for severing the inner tube and with a deflecting device for deflecting the one or more severed sections of the inner tube toward the inner wall of the outer tube when the coaxial cartridge is expressed.

Description

Ausdrückvorrichtung für eine Coaxialkartusche Ejection device for a coaxial cartridge
Die Erfindung betrifft eine Ausdrückvorrichtung für eine Coaxialkartusche nach dem Oberbegriff des Anspruchs 1 und eine Coaxialkartusche mit einer derartigen Ausdrückvorrichtung nach dem Oberbegriff des Anspruchs 14.The invention relates to an ejection device for a coaxial cartridge according to the preamble of claim 1 and a coaxial cartridge with such an ejection device according to the preamble of claim 14.
Coaxialkartuschen der eingangs genannten Art werden vielfach zur Lagerung und Verarbeitung von reaktiven Klebstoffen, Dichtmassen und dgl. eingesetzt. Sie weisen üblicherweise ein Außenrohr und ein dazu koaxiales Innenrohr auf, die eine innere und äußere Aufnahmekammer für die unterschiedlichen Komponenten begrenzen. Um auch derartige Coaxialkartuschen mit den weit verbreiteten und kostengünstigen Standarddosierpistolen für die Einkomponentenkartuschen ausdrücken zu können, müssen allerdings besondere Ausdrückstempel vorgesehen werden. Die handelsüblichen Standarddosierpistolen haben nämlich nur einen Preßstempel, der auf dem Innenrohr aufstehen und ein Auspressen verhindern würde. Daher muß ein speziell ausgestalteter Ausdrückstempel eingesetzt werden, der aus einem mittigen Preßstempel und einem als Rohr ausgeführten äußeren Preßstempel besteht. Der Nachteil einer derartigen Ausführung besteht darin, daß der Ausdrückstempel ca. die Hälfte des in einer Standarddosierpistole für die Aufnahme von Kartusche und Ausdrückstempel zur Verfügung stehenden Platzes einnimmt, so daß das Füllvolumen von derartigen Coaxialkartuschen gegenüber den handelsüblichen Einkomponentenkartuschen auf die Hälfte beschränkt werden muß.Coaxial cartridges of the type mentioned are widely used for the storage and processing of reactive adhesives, sealing compounds and the like. They usually have an outer tube and an inner tube coaxial therewith, which delimit an inner and outer receiving chamber for the different components. In order to be able to express such coaxial cartridges with the widespread and inexpensive standard dispensing guns for the one-component cartridges, however, special extraction stamps must be provided. The commercially available standard dispensing guns have only one press ram that would stand on the inner tube and prevent it from being squeezed out. Therefore, a specially designed push-out punch must be used, which consists of a central press punch and an outer press punch designed as a tube. The disadvantage of such an embodiment is that the ejection stamp takes up about half of the space available in a standard dosing gun for holding the cartridge and ejection stamp, so that the filling volume of such coaxial cartridges must be limited to half compared to the commercially available one-component cartridges.
Es ist auch bereits vorgeschlagen worden, das Innenrohr einer Coaxialkartusche als faltbares Aluminiunirohr auszubilden, so daß das Innenrohr beim Auspressen der Coaxialkartusche mit einer handelsüblichen Dosierpistole für Einkomponentenkartuschen zusammengefaltet wird. Diese Ausführung hat jedoch den Nachteil, daß spezielle Anforderungen an das Abfüllen der Harze und an die Montage der Kolben gestellt werden müssen. Auch im Hinblick auf die Entsorgung sind die aus Kunststoff- und Metallteilen bestehenden Coaxialkartuschen nicht ideal. Aufgabe der Erfindung ist es, eine Ausdrückvorrichtung und eine Coaxialkartusche der eingangs genannten Art zu schaffen, die eine Vergrößerung des Füllvolumens der mit handelsüblichen Dosierpistolen ausdrückbaren Coaxialkartuschen ermöglichen.It has also been proposed to design the inner tube of a coaxial cartridge as a foldable aluminum tube, so that the inner tube is folded up with a commercially available metering gun for one-component cartridges when the coaxial cartridge is pressed out. However, this embodiment has the disadvantage that special requirements must be placed on the filling of the resins and on the assembly of the pistons. The coaxial cartridges made of plastic and metal parts are also not ideal with regard to disposal. The object of the invention is to provide an ejecting device and a coaxial cartridge of the type mentioned at the outset, which enable the filling volume of the coaxial cartridges which can be expressed with commercially available metering guns to be increased.
Diese Aufgabe wird durch eine Ausdrückvorrichtung mit den Merkmalen des Anspruchs 1 und durch eine Coaxialkartusche mit den Merkmalen des Anspruchs 14 gelöst. Zweckmäßige Ausgestaltungen und vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved by an ejection device with the features of claim 1 and by a coaxial cartridge with the features of claim 14. Expedient refinements and advantageous developments of the invention are specified in the subclaims.
Das erfindungsgemäße Konzept besteht darin, daß das Innenrohr einer Coaxialkartusche beim Ausdrücken der Coaxialkartusche durch eine Trenneinrichtung auseinandergetrennt und an die Innenwand des Außenrohres umgebogen wird. Dies erfolgt durch eine besonders gestaltete Ausdrückvorrichtung, die eine Trenneinrichtung zum Auftrennen des Innenrohrs und eine Umlenkeinrichtung zum Umlenken des mindestens einen aufgetrennten Rohrabschnitts zur Innenwand des Außenrohrs enthält. Diese Ausdrückvorrichtung kann als gesondertes Bauteil ausgeführt oder auch in den Dichtkolben der Kartusche integriert sein.The concept according to the invention consists in that the inner tube of a coaxial cartridge is separated from one another by a separating device when the coaxial cartridge is pressed out, and is bent over onto the inner wall of the outer tube. This is done by a specially designed squeezing device, which contains a separating device for separating the inner tube and a deflecting device for deflecting the at least one cut pipe section to the inner wall of the outer pipe. This push-out device can be designed as a separate component or can also be integrated in the sealing piston of the cartridge.
In einer besonders zweckmäßigen Ausführungsform der Erfindung enthält die Trenneinrichtung zwei Schneidelemente, durch welche das Innenrohr in etwa zwei gleich große Hälften aufgeteilt wird. Die Trenneinrichtung kann aber auch nur ein oder mehr als zwei Schneidelemente zum Auftrennen des Innenrohres aufweisen. Aus Kostengründen ist das Schneidelement zweckmäßigerweise eine Kunststoffklinge, die einteilig mit der als Kunststoffspritzteil hergestellten Ausdrückvorrichtung ausgeführt ist. Das Schneidelement kann aber auch eine als Einzelteil gespritzte Kunststoffklinge sein, die in der Ausdrückvorrichtung montiert wird. Bei härteren Kartuschenmaterialien können auch Schneidklingen aus Metall eingesetzt werden. Metallldingen werden bevorzugt als Einlegeteile in der durch Spritzgußtechnik hergestellten Ausdrückvorrichtung integriert.In a particularly expedient embodiment of the invention, the separating device contains two cutting elements through which the inner tube is divided into approximately two halves of equal size. However, the separating device can also have only one or more than two cutting elements for separating the inner tube. For reasons of cost, the cutting element is expediently a plastic blade which is made in one piece with the ejection device produced as a plastic injection-molded part. The cutting element can, however, also be a plastic blade molded as an individual part, which is mounted in the ejection device. Metal cutting blades can also be used for harder cartridge materials. Metal things are preferably integrated as inserts in the ejection device produced by injection molding technology.
Die Schneidelemente sind in vorteilhafter Weise derart angebracht, daß sie das Innenrohr nicht im rechten Winkel zur Rohrwandung, sondern schräg schneiden. Dadurch kann der Schneidwiderstand verringert werden. Vorzugsweise sind die Schneidklingen unter einem Winkel von 45-60° zu einer Tangente an ein in das Innenrohr passendes Führungsstück der Ausdrückvorrichtung angeordnet. Die Umlenkeinrichtung besteht zweckmäßigerweise aus kegelförmigen Umlenkflächen und/oder schrägen Führungsflächen, durch welche die aufgetrennten Abschnitte des Innenrohrs zu seitlichen Schlitzen gelenkt und an dem Preßstempel der Dosierpistole o.a. vorbeigeleitet werden. Durch die Umlenkflächen und die seitlichen Schlitze wird die aufgetrennte Innenrohrwand verbogen und an die Innenwand des Außenrohres gedrückt. Der Preßstempel einer üblichen Dosierpistole für Einkomponentenkartuschen hat so genügend Platz, um am aufgetrennten und zur Seite gebogenen Innenrohr vorbeizukommen und die Dichtkolben über die Ausdrückvorrichtung nach vorne zu pressen. Der Innenteil der Ausdrückvorrichtung weitet sich von dem in das Innenrohr passenden vorderen Führungsteil bis zum hinteren Ende vorzugsweise kontinuierlich aus. Dadurch wird das Innenrohr unter Zugspannung gesetzt, wodurch das Schneiden erleichtert wird. Um das Ansetzen der Schneidklingen zur Erleichtern können am Ende des Innenrohrs z.B. V-förmige Einkerbungen vorgesehen sein.The cutting elements are advantageously mounted in such a way that they cut the inner tube not at a right angle to the tube wall, but at an angle. This can reduce the cutting resistance. The cutting blades are preferably arranged at an angle of 45-60 ° to a tangent to a guide piece of the ejection device that fits into the inner tube. The deflection device expediently consists of conical deflection surfaces and / or inclined guide surfaces, through which the cut sections of the inner tube are directed to lateral slots and are guided past the press ram of the metering gun or the like. The split inner tube wall is bent by the deflection surfaces and the lateral slots and pressed against the inner wall of the outer tube. The plunger of a conventional dosing gun for one-component cartridges has enough space to get past the inner tube that has been cut open and bent to the side and to press the sealing pistons forward using the ejection device. The inner part of the push-out device preferably extends continuously from the front guide part fitting into the inner tube to the rear end. This places the inner tube under tension, which makes cutting easier. In order to facilitate the attachment of the cutting blades, for example V-shaped notches can be provided at the end of the inner tube.
Die Ausdrückvorrichtung wird vorzugsweise in der Coaxialkartusche vormontiert. Dazu wird zweckmäßigerweise das Innenrohr der Kartusche um die Länge der Ausdrückvorrichtung gekürzt, so daß die Ausdrückvorrichtung durch das Außenrohr abgedeckt ist und die Ausdrückvorrichtung beim beginnenden Auspressen der Kartusche durch das Außenrohr geführt wird.The ejection device is preferably preassembled in the coaxial cartridge. For this purpose, the inner tube of the cartridge is expediently shortened by the length of the ejection device, so that the ejection device is covered by the outer tube and the ejection device is guided through the outer tube when the cartridge begins to be pressed out.
Vorzugsweise sind an dem zum Preßstempel der Dosierpistole gewandten Ende der Ausdrückvorrichtung Zentrierhilfen zur zentrischen Anordnung des Preßstempels bezüglich der Ausdrückvorrichtung vorgesehen. Dadurch wird gewährleistet, daß die aufgetrennten Innenrohrbereiche sicher an dem Preßstempel vorbeigleiten können.Centering aids are preferably provided on the end of the push-out device facing the press ram of the metering gun for the central arrangement of the press ram with respect to the push-out device. This ensures that the separated inner tube areas can slide past the press ram safely.
In einer weiteren zweckmäßigen Ausführung sind ein oder mehrere zusätzliche Abweiser vorgesehen, durch die das eine Ende des mindestens einen aufgetrennten Abschnitts des Innenrohrs nach innen und/oder das andere Ende nach außen gedrückt wird. Die Abschnitte stauen sich im Bereich der Tre nstelle so weniger gegenseitig auf, wodurch das Auftrennen erleichtert und der Schneidwiderstand verringert wird.In a further expedient embodiment, one or more additional deflectors are provided, by means of which one end of the at least one cut-open section of the inner tube is pressed inwards and / or the other end is pressed outwards. The sections accumulate less in the area of the Tre nstelle so that the separation easier and the cutting resistance is reduced.
Weitere Besonderheiten und Vorzüge der Erfindung ergeben sich aus der folgenden Beschreibung bevorzugter Ausführungsbeispiele anhand der Zeichnung. Es zeigt: Figur 1 eine Teilansicht einer Zweikomponenten-Coaxialkartusche mit Kolben, Preßstempel und einer erfindungsgemäßen Ausdrückvorrichtung im Schnitt;Further special features and advantages of the invention result from the following description of preferred exemplary embodiments with reference to the drawing. It shows: Figure 1 is a partial view of a two-component coaxial cartridge with piston, ram and an ejection device according to the invention in section;
Figur 2 eine Draufsicht auf den zum Kolben gewandten Teil einer zweiten Ausführungsform einer erfindungsgemäßen Ausdrückvorrichtung;Figure 2 is a plan view of the part facing the piston of a second embodiment of an ejection device according to the invention;
Figur 3 eine perspektivische Ansicht des zum Kolben gewandten Teils der in Figur 2 dargestellten Ausdrückvorrichtung;FIG. 3 shows a perspective view of the part of the ejection device shown in FIG. 2 facing the piston;
Figur 4 eine perspektivische Ansicht des zum Preßstempel gewandten Teils der in Figur 2 dargestellten Ausdrückvorrichtung;FIG. 4 shows a perspective view of the part of the ejection device shown in FIG. 2 facing the press ram;
Figur 5 eine Draufsicht auf den zum Kolben gewandten Teil einer dritten Ausfülirungsform einer erfindungsgemäßen Ausdrückvorrichtung;FIG. 5 shows a plan view of the part of a third embodiment of an ejection device according to the invention facing the piston;
Figur 6 eine Schnittansicht entlang der Linie A-A von Figur 5 undFigure 6 is a sectional view taken along line A-A of Figure 5 and
Figur 7 eine perspektivische Ansicht des zum Kolben gewandten Teils eines zweiten Ausführungsbeispiels einer Vorrichtung zum Auftrennen des Innenrohrs einer 1:1- Coaxialkartusche undFIG. 7 shows a perspective view of the part of a second exemplary embodiment of a device for opening the inner tube of a 1: 1 coaxial cartridge and facing the piston
Figur 8 eine weitere Ausführungsform einer Ausdrückvorrichtung in einer Schnittansicht entlang der Linie A-A von Figur 9 undFIG. 8 shows a further embodiment of an ejection device in a sectional view along the line A-A of FIGS. 9 and
Figur 9 eine Draufsicht auf den zum Kolben gewandten Teil der in Figur 8 gezeigten Ausführungsform einer Ausdrückvorrichtung.FIG. 9 shows a plan view of the part of the embodiment of an ejection device shown in FIG. 8 facing the piston.
In Figur 1 ist schematisch ein Teil einer Zweikomponenten-Coaxialkartusche 1 mit einem Außenrohr 2 und einem dazu konzentrischen Innenrohr 3 gezeigt. Das Innenrohr 3 bildet eine innere Kammer 4, in der ein zentraler innerer Kolben 5 verschiebbar angeordnet ist. Zwischen der Außenwand des Innenrohrs 3 und der Innenwand des Außenrohrs 2 wird eine äußere Ringkammer 6 begrenzt, in der ein ringförmiger äußerer Kolben 7 verschiebbar angeordnet ist. Die innere Kammer 4 und die äußere Ringkammer 6 dienen zur Aufnahme zu verteilender Materialkomponenten, die durch Verschiebung der beiden Kolben 5 und 7 mittels eines Preßstempels 8 einer handelsüblichen Dosierpistole oder dgl. an einer nicht dargestellten Kartuschenaustrittsöffhung austreten. Bei der in Figur 1 dargestellten Ausführung ist zwischen den beiden Kolben 5 bzw. 7 und dem Preßstempel 8 eine im folgenden näher erläuterte Ausdrückvorrichtung angeordnet.FIG. 1 schematically shows part of a two-component coaxial cartridge 1 with an outer tube 2 and an inner tube 3 concentric with it. The inner tube 3 forms an inner chamber 4, in which a central inner piston 5 is slidably arranged. Between the outer wall of the inner tube 3 and the inner wall of the outer tube 2, an outer annular chamber 6 is delimited, in which an annular outer piston 7 is slidably arranged. The inner chamber 4 and the outer annular chamber 6 serve to accommodate material components to be distributed, which by moving the two pistons 5 and 7 by means of a Press ram 8 exit a commercially available metering gun or the like at a cartridge outlet opening (not shown). In the embodiment shown in Figure 1 between the two pistons 5 and 7 and the press ram 8, a squeezing device explained in more detail below is arranged.
Die in Figur 1 in einem Querschnitt dargestellte Ausdrückvorrichtung ist in Form eines Stößels mit einer zylindrischen Außenwand 9 und einem sich kegelförmig erweiternden Innenteil 10 ausgeführt. Der Außendurchmesser der Außenwand 9 ist geringfügig kleiner als der Innendurchmesser des Außenrohrs 2. Der Innenteil 10 hat an seinem kolbenseitigen vorderen Ende ein in das Innenrohr 3 passendes zentrales Führui gsstück 11, das bei der gezeigten Ausführung einen ovalen Querschnitt aufweist. Von dem Führungsstück 11 verlaufen kegelförmige Umlenkflächen 12 zu zwei gegenüberliegenden Austrittsschlitzen 13, die im Bereich der Außenwand 9 an dem zum Preßstempel 8 weisenden hinteren Ende des Stößels angeordnet sind. Zwischen der Außenwand 9 und dem Innenteil 10 sind zwei gegenüberliegende Verbindungsstege mit jeweils einer gegenüber dem Führungsstück 11 zurückversetzten oberen Kante 14 und zu beiden Seiten schräg abfallenden Führungsflächen 15 angeordnet. Auf den oberen Kanten 14 der beiden Verbindungsstege ist jeweils eine an das Führungsstück 11 anschließende Schneidklinge 16 zum Auftrennen des Innenrohrs 3 angeordnet. Das Innenteil 10 ist als Hohlteil mit mehreren gleichwinklig beabstandeten und im Querschnitt kreissegmentförmigen Durchgangsbohrungen 17 ausgeführt.The ejection device shown in cross section in FIG. 1 is designed in the form of a plunger with a cylindrical outer wall 9 and a conically widening inner part 10. The outer diameter of the outer wall 9 is slightly smaller than the inner diameter of the outer tube 2. The inner part 10 has at its piston-side front end a fitting in the inner tube 3 central guide piece 11, which has an oval cross section in the embodiment shown. Conical deflecting surfaces 12 extend from the guide piece 11 to two opposite outlet slots 13, which are arranged in the region of the outer wall 9 at the rear end of the tappet pointing towards the press ram 8. Between the outer wall 9 and the inner part 10, two opposite connecting webs are arranged, each with an upper edge 14 set back with respect to the guide piece 11 and guide surfaces 15 sloping on both sides. On the upper edges 14 of the two connecting webs, a cutting blade 16 adjoining the guide piece 11 is arranged for cutting the inner tube 3. The inner part 10 is designed as a hollow part with a plurality of through bores 17 which are spaced at equal angles and are circular segment-shaped in cross section.
Wie aus Figur 1 hervorgeht, wird das Innenrohr 3 beim Eindrücken der Ausdrückvorrichtung mittels des Stempel 8 durch die beiden Schneidklingen 16 aufgetrennt. Die aufgetrennten Abschnitte 18 des Innenrohrs 3 werden über die Führungsflächen 15 und die kegelförmigen Umlenkflächen 12 des Innenteils 10 zu den beiden Austrittsschlitzen 13 gelenkt und durch diese hindurch an dem Preßstempel 8 vorbeigeführt.As can be seen from FIG. 1, the inner tube 3 is cut by the two cutting blades 16 when the ejection device is pressed in by means of the punch 8. The separated sections 18 of the inner tube 3 are guided via the guide surfaces 15 and the conical deflection surfaces 12 of the inner part 10 to the two outlet slots 13 and are guided through this past the press ram 8.
In den Figuren 2 bis 4 ist ein weiteres Ausführungsbeispiel einer Ausdrückvorrichtung gezeigt. Diese Ausführung unterscheidet sich von dem in Figur 1 dargestellten Ausführungsbeispiel lediglich dadurch, daß die Schneidklingen 16 nicht auf einer durch den Mittelpunkt des Führungsteils 11 verlaufenden gemeinsamen Achse, sondern zueinander parallel versetzt unter einem Winkel α von weniger als 90°, vorzugsweise zwischen 45 und 60°, gegenüber einer Tangente 19 zum Führungsteil 11 angeordnet sind. Die einander entsprechenden Teile sind daher mit denselben Bezugszeichen versehen. Auch bei dieser Ausführung verlaufen von dem in das Innenrohr passenden ovalen Führungsteil 11 kegelförmige Umlenkflächen 12 zu den Austrittsschlitzen 13, die einander gegenüberliegend am Rand der Außenwand 9 angeordnet sind. Die Schneidklingen 16 sind auf den oberen Kanten 14 zweier versetzter Verbindungsstege mit schräg oder gebogen verlaufenden Führungsflächen 15 angeordnet.FIGS. 2 to 4 show a further embodiment of an ejection device. This embodiment differs from the exemplary embodiment shown in FIG. 1 only in that the cutting blades 16 are not offset on a common axis running through the center of the guide part 11, but offset parallel to one another at an angle α of less than 90 °, preferably between 45 and 60 °, are arranged opposite a tangent 19 to the guide part 11. The one another corresponding parts are therefore provided with the same reference numerals. In this embodiment too, conical deflection surfaces 12 run from the oval guide part 11 fitting into the inner tube to the outlet slots 13, which are arranged opposite one another on the edge of the outer wall 9. The cutting blades 16 are arranged on the upper edges 14 of two offset connecting webs with obliquely or curved guide surfaces 15.
Wie aus Figur 4 hervorgeht, sind an dem zum Preßstempel gewandten hinteren Ende der Ausdrückvorrichtung zwei kreisbogenförmig verlaufende Zentrierstege 20 mit nach innen konisch zulaufenden Zenrierflächen 21 vorgesehen. Durch die zwischen den AustrittsschlitzenAs can be seen from FIG. 4, two centering webs 20 running in the shape of an arc of a circle and with conically tapering surfaces 21 are provided on the rear end of the ejection device facing the press ram. Through between the outlet slots
14 angeordneten Zentrierstege 20 wird eine mittige Anordnung des Preßstempels 8 an der Ausdrückeinrichtung und eine sichere Vorbeiführung der Abschnitte 18 am Preßstempel erreicht.14 arranged centering webs 20, a central arrangement of the press ram 8 on the ejection device and a safe passage of the sections 18 is achieved on the press ram.
Die Figuren 5 bis 7 zeigen ein weiteres Ausführungsbeispiel einer Ausdrückvorrichtung, die für eine 1:1 Zweikomponenten-Coaxialkartuschen mit gleichem Aufhahmevolumen der inneren und äußeren Kammer bestimmt ist. Bei dieser Ausfuhrung ist der Durchmesser des hier mit einem Kreisquerschnitt ausgeführten Führungsstücks 11 an den entsprechend größeren Innendurchmesser des Innenrohrs angepaßt. Auch hier sind die Schneidklingen 16 auf der oberen Kante 14 eines Verbindungsstegs zwischen dem inneren Führungsteil 11 und der Außenwand 9 angeordnet und die durch die Schneidklingen 16 aufgetrennten Abschnitte werden durch kegelförmige Umlenkflächen 12 und gebogene oder schräge FührungsflächenFIGS. 5 to 7 show a further exemplary embodiment of an ejection device which is intended for a 1: 1 two-component coaxial cartridges with the same holding volume of the inner and outer chamber. In this embodiment, the diameter of the guide piece 11 executed here with a circular cross section is adapted to the correspondingly larger inner diameter of the inner tube. Here too, the cutting blades 16 are arranged on the upper edge 14 of a connecting web between the inner guide part 11 and the outer wall 9 and the sections separated by the cutting blades 16 are replaced by conical deflection surfaces 12 and curved or inclined guide surfaces
15 zu den seitlichen Austrittsschlitzen 13 gelenkt. Bei der gezeigten Ausführung sind die auf der Oberseite abgeschrägten Schneidklingen 16 diametral gegenüberliegend auf einer durch den Mittelpunkt der Ausdrückvorrichtung verlaufenden Mittelachse 22 angeordnet.15 directed to the lateral outlet slots 13. In the embodiment shown, the cutting blades 16, which are bevelled on the upper side, are arranged diametrically opposite one another on a central axis 22 running through the center of the ejection device.
Ein weiteres Ausführungsbeispiel einer Ausdrückvorrichtung ist in den Figuren 8 und 9 gezeigt. Auch dort weist die Ausdrückvorrichtung eine zylindrische Außenwand 9 und einen sich in Richtung des Preßstempels kegelförmig erweiternden Innenteil 10 auf. Der Innenteil 10 umfaßt ebenfalls ein in das Innenrohr 3 einer Coaxialkartusche 1 passendes zentrales Führungsstück 11, von dem kegelförmige Umlenkflächen 12 zu zwei gegenüberliegenden Austrittsschlitzen 13 verlaufen. Zwischen der Außenwand 9 und dem Innenteil 10 sind auch hier Verbindungsstege mit einer oberen Kante 14 und zu beiden Seiten schräg abfallenden Führungsflächen 15 vorgesehen. Die oberen Kanten 14 sind hier als Schneidkanten ausgebildet und bilden die Trenneinrichtung zum Auftrennen des Innenrohrs 3 in zwei Abschnitte 23 und 24. Bei dieser Ausführung sind an der Außenseite des Führungsstücks 11 unterhalb der Kanten 14 zwei diametral gegenüberliegende und auf entgegengesetzten Seiten der Kanten 14 angeordnete erste Abweiser 25 in Form von nach außen vorstehenden Vorsprüngen angeformt. Durch diese Abweiser 25 wird das eine Ende der aufgetrennten Anschnitte 23 und 24 des Innenrohrs 3 im Bereich der Kante 14 radial nach außen gedrückt. Den ersten Abweisern 23 gegenüberliegend sind auf der anderen Seite der Kanten 14 optional zweite Abweiser 26 vorgesehen, durch welche die den nach innen gebogenen Enden gegenüberliegenden Enden des jeweils anderen Wandabschnitts 23 bzw. 24 des Innenrohrs 3 radial nach innen gedrückt werden. In dem Führungsstück 11 sind diametral gegenüberliegende Einbuchtungen 27 zur Aufnahme der nach innen gedrückten Enden der Abschnitte 23 und 24 vorgesehen. Die Enden der aufgetrennten Abschnitte 23 und 24 werden so im Bereich der Schneidkante auseinandergedrückt und stauchen sich so weniger gegenseitig auf. Auf diese Weise wird der Schneidvorgang weniger behindert und der Schneidwiderstand reduziert.Another embodiment of an ejection device is shown in FIGS. 8 and 9. There, too, the ejection device has a cylindrical outer wall 9 and an inner part 10 which widens conically in the direction of the press ram. The inner part 10 also comprises a central guide piece 11 which fits into the inner tube 3 of a coaxial cartridge 1 and from which conical deflection surfaces 12 extend to two opposite outlet slots 13. Between the outer wall 9 and the inner part 10 here, too, connecting webs with an upper edge 14 and guide surfaces 15 sloping towards both sides are provided. The upper edges 14 are here as cutting edges formed and form the separating device for separating the inner tube 3 into two sections 23 and 24. In this embodiment, on the outside of the guide piece 11 below the edges 14, two diametrically opposite first deflectors 25 arranged on opposite sides of the edges 14 in the form of outwards molded projections. This deflector 25 pushes one end of the cut gates 23 and 24 of the inner tube 3 radially outward in the region of the edge 14. Opposite the first deflectors 23, second deflectors 26 are optionally provided on the other side of the edges 14, by means of which the ends of the other wall section 23 or 24 of the inner tube 3 opposite the inwardly bent ends are pressed radially inwards. In the guide piece 11 diametrically opposite indentations 27 are provided for receiving the pressed-in ends of the sections 23 and 24. The ends of the cut sections 23 and 24 are thus pressed apart in the region of the cutting edge and are less likely to compress each other. In this way, the cutting process is less hindered and the cutting resistance is reduced.
Die vorstehend beschriebenen Ausdrückvorrichtungen sind zweckmäßigerweise als Spritzgußteile hergestellt. Die Schneidklingen können einstückig mit dem Spritzgußteil als Kunststoffklingen ausgeführt sein. Sie können aber auch fest in das Spritzgußteil eingespritzte oder auswechselbare Schneidklingen aus Metall sein.The pushing-out devices described above are expediently produced as injection molded parts. The cutting blades can be made in one piece with the injection molded part as plastic blades. But they can also be solidly injected or replaceable metal cutting blades into the injection molded part.
Die Erfindung ist nicht auf die vorstehend beschriebenen und in der Zeichnung dargestellten Ausführungsbeispiele beschränkt. So kann die Ausdrückvorrichtung durch entsprechende Dimensionierung der Außenwand und des Innenteils für sämtliche Standard- Coaxialkartuschen mit allen Füllvolumenverhältnissen der Innen- und Außenkammer eingesetzt werden. The invention is not limited to the exemplary embodiments described above and shown in the drawing. The ejection device can be used for all standard coaxial cartridges with all filling volume ratios of the inner and outer chamber by appropriate dimensioning of the outer wall and the inner part.

Claims

Ansprüche Expectations
1. Ausdrückvorrichtung für eine Coaxialkartusche mit einem Außenrohr (2) und einem Innenrohr (3), gekennzeichnet durch eine Trenneinrichtung (14, 16) zum Auftrennen des Innenrohrs (3) und eine Umlenkeinrichtung (12, 13, 15) zum Umlenken des mindestens einen aufgetrennten Abschnitts des Innenrohrs (3) zur Innenwand des Außenrohrs (2) beim Ausdrücken der Coaxialkartusche.1. ejection device for a coaxial cartridge with an outer tube (2) and an inner tube (3), characterized by a separating device (14, 16) for separating the inner tube (3) and a deflecting device (12, 13, 15) for deflecting the at least one separated section of the inner tube (3) to the inner wall of the outer tube (2) when pushing out the coaxial cartridge.
2. Ausdrückvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Trenneinrichtung mindestens ein Schneidelement (16) zum Durchtrennen der Wandung des Innenrohrs (3) enthält.2. Squeezing device according to claim 1, characterized in that the separating device contains at least one cutting element (16) for severing the wall of the inner tube (3).
3. Ausdrückvorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß das mindestens eine Schneidelement (16) eine integrierte oder einsetzbare Kunststoff- oder Metallklinge ist.3. ejection device according to claim 2, characterized in that the at least one cutting element (16) is an integrated or insertable plastic or metal blade.
4. Ausdrückvorrichtung nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß das mindestens eine Schneidelement (16) senkrecht oder schräg zur Rohrwandung des Innenrohrs (3) angeordnet ist.4. ejection device according to claim 2 or 3, characterized in that the at least one cutting element (16) is arranged perpendicular or obliquely to the tube wall of the inner tube (3).
5. Ausdrückvorrichtung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß das mindestens eine Schneidelement (16) neben einem in das Innenrohr (3) passenden Führungsstück (11) eines sich in Richtung mindestens eines seitlichen Austrittsschlitzes (13) erweiternden Innenteils (10) der Ausdrückvorrichtung angeordnet ist.5. ejecting device according to one of claims 2 to 4, characterized in that the at least one cutting element (16) in addition to a in the inner tube (3) matching guide piece (11) of a widening in the direction of at least one lateral outlet slot (13) inner part (10 ) the ejection device is arranged.
6. Ausdrückvorrichtung nach Ansprach 5, dadurch gekennzeichnet, daß sich das Innenteil (10) in Richtung des mindestens einen Austrittsschlitzes (13) kontinuierlich oder stufenweise erweitert. 6. Squeezing device according spoke 5, characterized in that the inner part (10) in the direction of the at least one outlet slot (13) extends continuously or stepwise.
7. Ausdrückvorrichtung nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß das mindestens eine Schneidelement (16) auf einem Verbindungssteg (14, 15) zwischen einer zylindrischen Außenwand (9) und dem Innenteil (10) angeordnet ist.7. ejection device according to one of claims 2 to 6, characterized in that the at least one cutting element (16) on a connecting web (14, 15) between a cylindrical outer wall (9) and the inner part (10) is arranged.
8. Ausdrückvorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Umlenkeinrichtung (12, 13, 15) kegelförmige Umlenkflächen (12) und/oder schräge Führangsflächen (15) zum Umlenken des mindestens einen aufgetrennten Abschnitts des Innenrohrs (3) zu einem oder mehreren seitlichen Schlitzen (13) aufweist.8. ejection device according to one of claims 1 to 7, characterized in that the deflecting device (12, 13, 15) conical deflecting surfaces (12) and / or inclined guide surfaces (15) for deflecting the at least one section of the inner tube (3) one or more lateral slots (13).
9. Ausdrückvorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß sie an ihrem zu einem Preßstempel (8) gewandten hinteren Ende Zentrierelemente (20) enthält.9. Ejecting device according to one of claims 1 to 8, characterized in that it contains centering elements (20) on its rear end facing a press ram (8).
10. Ausdrückvorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß im Bereich der Trenneinrichtung (14, 16) ein oder mehrere zusätzliche Abweiser (25, 26) vorgesehen sind, durch die das eine Ende des mindestens einen aufgetrennten Abschnitts (23, 24) des Innenrohrs (3) nach innen und/oder das andere Ende nach außen gedrückt wird.10. Ejection device according to one of claims 1 to 9, characterized in that one or more additional deflectors (25, 26) are provided in the region of the separating device (14, 16), through which one end of the at least one separated section (23, 24) of the inner tube (3) inwards and / or the other end is pressed outwards.
11. Ausdrückvorrichtung nach Ansprach 10, dadurch gekennzeichnet, daß die zusätzlichen Abweiser (25, 26) aus einem ersten Abweiser (25) auf der einen Seite der Trennneinrichtung (14, 16) und einem zweiten Abweiser (26) auf der anderen Seite der Trenneinrichtung (14, 16) bestehen.11. Expressing device according spoke 10, characterized in that the additional deflectors (25, 26) from a first deflector (25) on one side of the separating device (14, 16) and a second deflector (26) on the other side of the separating device (14, 16) exist.
12. Ausdrückvorrichtung nach einem der Ansprüche 5 bis 11, dadurch gekennzeichnet, daß das Führungsstück (11) mindestens eine Einbuchtung (27) zur Aufnahme des nach innen gedrückten Endes des mindestens einen aufgetrennten Abschnitts (23, 24) des Innenrohrs (3) aufweist. 12. Ejection device according to one of claims 5 to 11, characterized in that the guide piece (11) has at least one indentation (27) for receiving the inwardly pressed end of the at least one cut-open section (23, 24) of the inner tube (3).
13. Ausdrückvorrichtung nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß sie als einteiliges Spritzgußteil ausgeführt ist.13. Squeezing device according to one of claims 1 to 12, characterized in that it is designed as a one-piece injection molded part.
14. Coaxialkartusche mit einem Außenrohr (2), einem Innenrohr (3) und einer Ausdrückvorrichtung, dadurch gekennzeichnet, daß die Ausdrückvorrichtung nach einem der Ansprüche 1 bis 13 ausgebildet ist.14. Coaxial cartridge with an outer tube (2), an inner tube (3) and an ejection device, characterized in that the ejection device is designed according to one of claims 1 to 13.
15. Coaxialkartusche nach Ansprach 14, dadurch gekennzeichnet, daß das Innenrohr (3) mindestens eine Kerbe zum Ansetzen der Trenneinrichtung (14, 16) enthält.15. Coaxial cartridge according spoke 14, characterized in that the inner tube (3) contains at least one notch for attaching the separating device (14, 16).
16. Coaxialkartusche nach Anspruch 14 oder 15, dadurch gekennzeichnet, daß die Ausdrückvorrichtung als gesondertes Teil ausgeführt ist.16. Coaxial cartridge according to claim 14 or 15, characterized in that the ejection device is designed as a separate part.
17. Coaxialkartusche nach Anspruch 14 oder 15, dadurch gekennzeichnet, daß die Ausdrückvorrichtung in mindestens einen Dichtungskolben (5, 7) zur Abdichtung des Außenrohrs (2) und/oder des Innenrohrs (3) integriert ist.17. Coaxial cartridge according to claim 14 or 15, characterized in that the ejection device is integrated in at least one sealing piston (5, 7) for sealing the outer tube (2) and / or the inner tube (3).
18. Coaxialkartusche nach einem der Ansprüche 14 bis 17, dadurch gekennzeichnet, daß die Ausdrückvorrichtung in der Coaxialkartusche (1) vormontiert ist.18. Coaxial cartridge according to one of claims 14 to 17, characterized in that the ejection device in the coaxial cartridge (1) is preassembled.
19. Coaxialkartusche nach einem der Ansprüche 14 bis 18, dadurch gekennzeichnet, daß das Innenrohr (3) gegenüber dem Außenrohr (2) um die Länge der Ausdrückvorrichtung gekürzt ist. 19. Coaxial cartridge according to one of claims 14 to 18, characterized in that the inner tube (3) relative to the outer tube (2) is shortened by the length of the ejection device.
EP02791828A 2002-02-20 2002-12-14 Expressing device for a coaxial cartridge Expired - Lifetime EP1392450B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20202620U DE20202620U1 (en) 2002-02-20 2002-02-20 Ejection device for a coaxial cartridge
DE20202620U 2002-02-20
PCT/EP2002/014278 WO2003070385A1 (en) 2002-02-20 2002-12-14 Expressing device for a coaxial cartridge

Publications (2)

Publication Number Publication Date
EP1392450A1 true EP1392450A1 (en) 2004-03-03
EP1392450B1 EP1392450B1 (en) 2005-07-27

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ID=7968026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02791828A Expired - Lifetime EP1392450B1 (en) 2002-02-20 2002-12-14 Expressing device for a coaxial cartridge

Country Status (11)

Country Link
US (1) US6938797B2 (en)
EP (1) EP1392450B1 (en)
JP (1) JP4563685B2 (en)
CN (1) CN1245260C (en)
AT (1) ATE300361T1 (en)
AU (1) AU2002358141A1 (en)
CA (1) CA2442768C (en)
DE (2) DE20202620U1 (en)
ES (1) ES2244827T3 (en)
TW (1) TWI249436B (en)
WO (1) WO2003070385A1 (en)

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US10463413B2 (en) 2016-03-17 2019-11-05 Heraeus Medical Gmbh Storage and mixing system for pasty cement components and method therefor

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DE102007051968A1 (en) * 2007-10-31 2009-05-07 Fischerwerke Gmbh & Co. Kg Cartridge, for the application of two separated components, has a container wall thickness which is variable along its length
EP2353733B1 (en) * 2010-01-27 2014-03-19 Rolf Höse Cutting plunger
US8544683B2 (en) 2010-10-29 2013-10-01 Nordson Corporation Multiple component dispensing cartridge and method with side-by-side fluid chambers
DE102013107955A1 (en) 2013-07-25 2015-01-29 Fischerwerke Gmbh & Co. Kg Expressing device for a multi-chamber cartridge
KR101344670B1 (en) 2013-09-23 2014-01-15 최두리 Pastry bag tool having deflection shape nozzle
US9757763B2 (en) 2013-10-31 2017-09-12 Nordson Corporation Side by side cartridge assemblies and related methods
ES2696754T3 (en) 2014-08-05 2019-01-17 Basf Coatings Gmbh Support of cartridges, multi-chamber cartridges and dosing and mixing devices comprising the same
DE102016103816A1 (en) * 2016-03-03 2017-09-07 Heraeus Medical Gmbh Storage and mixing system for pasty cement components and method therefor
DE102016104409A1 (en) * 2016-03-10 2017-09-14 Heraeus Medical Gmbh Storage and mixing system for pasty cement components and method therefor
DE102016107911B4 (en) 2016-04-28 2020-02-27 Heraeus Medical Gmbh Storage and mixing system for pasty starting components with squeezable inner cartridge
DE102016113467B4 (en) 2016-07-21 2023-01-26 Heraeus Medical Gmbh Bone cement applicator with three-way pressure relief valve and method of expressing a bone cement with the bone cement applicator
DE102016113468A1 (en) 2016-07-21 2018-01-25 Heraeus Medical Gmbh Bone cement applicator with three-way valve for pressure relief
AU2018326211A1 (en) 2017-09-01 2020-02-27 Basf Coatings Gmbh Measuring and mixing devices
WO2019042774A1 (en) 2017-09-01 2019-03-07 Basf Coatings Gmbh Measuring and miixing devices
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Also Published As

Publication number Publication date
ATE300361T1 (en) 2005-08-15
CN1503703A (en) 2004-06-09
CA2442768A1 (en) 2003-08-28
JP2005517599A (en) 2005-06-16
TW200303240A (en) 2003-09-01
AU2002358141A1 (en) 2003-09-09
WO2003070385A1 (en) 2003-08-28
US6938797B2 (en) 2005-09-06
CN1245260C (en) 2006-03-15
EP1392450B1 (en) 2005-07-27
DE50203762D1 (en) 2005-09-01
TWI249436B (en) 2006-02-21
ES2244827T3 (en) 2005-12-16
CA2442768C (en) 2009-04-14
JP4563685B2 (en) 2010-10-13
US20040129122A1 (en) 2004-07-08
DE20202620U1 (en) 2003-04-30

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