EP1528011A1 - Coaxial two component cartridge - Google Patents

Coaxial two component cartridge Download PDF

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Publication number
EP1528011A1
EP1528011A1 EP04019006A EP04019006A EP1528011A1 EP 1528011 A1 EP1528011 A1 EP 1528011A1 EP 04019006 A EP04019006 A EP 04019006A EP 04019006 A EP04019006 A EP 04019006A EP 1528011 A1 EP1528011 A1 EP 1528011A1
Authority
EP
European Patent Office
Prior art keywords
neck
ribs
coaxial
inner tube
grooves
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
EP04019006A
Other languages
German (de)
French (fr)
Other versions
EP1528011B1 (en
Inventor
Nikolaus Brugner
Alfons Gleich
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.)
Medmix Switzerland 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
Application filed by Sulzer Chemtech AG filed Critical Sulzer Chemtech AG
Publication of EP1528011A1 publication Critical patent/EP1528011A1/en
Application granted granted Critical
Publication of EP1528011B1 publication Critical patent/EP1528011B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00503—Details of the outlet element
    • B05C17/00516—Shape or geometry of the outlet orifice or the outlet element
    • 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
    • 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
    • B05C17/00596—The liquid or other fluent material being supplied from a rigid removable cartridge having no active dispensing means, i.e. the cartridge requiring cooperation with means of the handtool to expel the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/32—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging two or more different materials which must be maintained separate prior to use in admixture
    • B65D81/3216—Rigid containers disposed one within the other
    • B65D81/3227—Rigid containers disposed one within the other arranged parallel or concentrically and permitting simultaneous dispensing of the two materials without prior mixing
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S285/00—Pipe joints or couplings
    • Y10S285/921—Snap-fit

Definitions

  • the invention relates to a coaxial two-component cartridge according to the preamble of Claim 1.
  • Such coaxial two-component cartridges are advantageously prepared so that the Outer tube and the inner tube are manufactured separately.
  • the two pipes must then be subsequently joined together to obtain a coaxial cartridge. It has to go through a suitable latching be ensured that the inner tube fixed to the outer tube anchored. A loosening of the inner tube during transport and filling of the cartridge must be prevented.
  • a not well fastened, in particular no longer centric arranged inner tube can cause problems in automatic filling by the Filling device no longer finds the inner tube.
  • the paragraph can be removed from the back as an undercut, so that The cartridge can be made closed with molded cap. There the undercut must be forcibly demolished, the paragraph can not sharp-edged be executed and the width of the paragraph is limited to a few tenths of a millimeter. This leads to a greatly reduced, potentially insufficient holding power.
  • a two-part coaxial cartridge is known in which the Inner tube is made of aluminum. On the inner tube are sawtooth ribs appropriate. The aluminum saw teeth dig into plastic when pressed into place existing, soft outer tube and thus form a solid anchorage.
  • the disadvantage of this Solution is that the use of aluminum pipes is expensive, and a cartridge consisting of metal and plastic in disposal ecologically problematic.
  • a two-part To create coaxial cartridge which is made of inexpensive plastic, suitable for a closed, integrally connected to the cartridge and by tearing, Cutting or Cancel openable outlet is suitable, and the anchoring of the Inner tube securely holds and a centric positioning of the same is guaranteed.
  • the holding force for fixing the inner tube opposite the outer tube by a fir-tree-like rib structure on the outside the neck of the inner tube on a plurality of groove flanks on the inside of the neck of the outer tube and thus evenly over a significant part of the length of both necks distributed. This ensures a tight fit of the connection and a stable coaxial Position of both tubes relative to each other even with a small groove depth and a rounded shape of the grooves.
  • the inner profile of the outer tube which a variety of Having successive grooves, advantageously in the injection molding with final Removal in a single direction, namely opposite to the later installation direction of the inner tube.
  • a small groove depth is a Forced removal, with a formation of the grooves as a thread and a spindles possible.
  • connection of the two tubes can be carried out by axial pressing, wherein the ribs are bent back against the installation direction and permanently in the thus deformed state remain to an axial holding force on the inner tube exercise.
  • connection can also be made by screwing in, whereby the holding force the screw results.
  • one comprises Inventive two-component cartridge 1, a cylindrical outer tube 2 and a same inner tube 3.
  • the two tubes are coaxial arranged to each other and thereby define a gap 4 in the form of a Hollow cylinder, in which one of the two for simultaneous squeezing out of the cartridge 1 certain components of an adhesive or the like.
  • the other Component contains the interior 5 of the inner tube 3.
  • the outer tube 2 and the inner tube 3 are manufactured separately and connected together before the cartridge 1 with the two components is filled.
  • FIG. 1A shows the state after insertion of the inner tube 3 in the outer tube 2, however before bringing about a mechanical connection of the two tubes 2 and 3.
  • FIG. 1B shows the state in which the two tubes are firmly connected to each other and to Filling the two components are ready. Since the components of the two tubes 2 and 3 are identical in Figures 1A and 1B, not all reference numerals are in both figures entered.
  • the mechanical connection of the two tubes 2 and 3 takes place in the region of the Outlet channels for the two components forming necks 6 and 7.
  • the neck. 6 of the outer tube 2 in its lower region on the inside a plurality of similar grooves 8, which follow each other equidistantly in the axial direction.
  • the depth of the Grooves 8 is dimensioned such that in the production by injection molding still a forced removal on the inside of the neck 6 is possible.
  • the grooves 8 extend in the axial direction starting from the lower end of the neck 6 over slightly more than the lower half. she lie in mutually parallel planes whose normal direction in each case the axial direction of Cartridge 1 is.
  • the Neck 7 of the inner tube 3 on its outside a variety of similar, one-piece molded ribs 9, which also follow each other equidistantly in the axial direction.
  • the axial spacing of the ribs 9 corresponds to that of the grooves 8
  • Outer diameter of the neck 7 of the inner tube 3 including the ribs 9 is greater than the clear diameter of the grooves 8.
  • the axial length of the area of the neck 7 of the Inner tube 3, over which the ribs 9 extend corresponds approximately to the axial length of the Area of the neck 6 of the outer tube 23, over which the grooves 8 extend, i.
  • the Number of ribs 9 is at least approximately coincident with the number of grooves 8, wherein But it does not depend on an exact match.
  • the number of grooves 8 and ribs 9 is between 10 and 15, and is as shown in Figs. 1A and 1B Example 13.
  • the grooves 8 and ribs 9 are intended to be in each other Engage when the inner tube 3 until it stops in the outer tube. 2 is inserted.
  • This stop is determined by other ribs 10, which differ from the lower end of the neck 7 of the inner tube 3, starting along the outside in extend approximately radially.
  • These ribs 10 are in shape to the contour of the Inner surface of the outer tube 2 in the region of the transition 11 of at least one approximately radially extending end wall 12 of the same adapted to the neck 6.
  • On the The circumference of the inner tube 3 is at least three, in the example shown four ribs 10th equally distributed.
  • the height of the ribs 10 defines the height of the passage channel, by the in the hollow cylindrical space 4 between the outer tube 2 and the Inner tube 3 located component when pressing the cartridge 1 radially in the direction of Necks 6 and 7 are flowing.
  • the axial thickness of the ribs 9 on the outside of the inner tube 3 is in relation to their Radial length designed so that the ribs when exercising a predetermined Bending the axial force on the inner tube 3 downwards in the position shown in FIG. 1A, that the neck 7 of the inner tube 3 can slide into the neck 6 of the outer tube 2 until the previously explained, shown in Fig. 1B stop position is achieved.
  • Fig. 1B also shows an enlarged detail of the region of the two necks on the top right 6 and 7, in which the outer tube 2 and the inner tube 3 by the action of the ribs 9 in finally assembled state of the cartridge 1 are interconnected.
  • the ribs 9 due to their length, which is the inside width of the grooves 8 something exceeds, after pressing the neck 7 of the inner tube 3 in the neck 6 of the Outside tube 2 are no longer in the radial direction outward, but in contrast are slightly inclined, and in reverse with respect to installation direction, i. of the Direction of movement of the inner tube 3 at said pressing.
  • each rib 9 in the final assembly state of the cartridge 1 is comparable to that of the branches of a Tannenbaumes, each rib 9 is engaged in a groove 8 and with its end in this, i. especially supported on the lower flank.
  • the extent of the inclination depends depending on how much the outer diameter of the neck 7 including the ribs 9 the clear width of the grooves 8 exceeds.
  • FIG. 2A A side view of the inner tube 3 of the cartridge 1 in the unmounted initial state is in Fig. 2A shown enlarged.
  • Fig. 2A shows that the two types of ribs 9 and 10 and the Noses 17 even more clearly visible than in the cross-sectional view of the two mounting phases in Figures 1A and 1B.
  • Fig. 2A also shows that the ribs 9 are not annular run around the entire neck of the inner tube 3 around, but in the circumferential direction form individual segments, between each of which rib-free segments 18 are located.
  • the latter form in the final assembly state of the cartridge 1 vertical channels between the two Necks 6 and 7, through which in the space 4 between the outer tube 2 and the inner tube 3 located component during the extrusion of the cartridge 1 can flow. It does not depend on an exactly vertical course of these channels, but only in that for said component any passages in the vertical direction, the for example, could also be helical, are present.
  • the outer diameter of the neck 7 of the inner tube 3 including the ribs 9 and the Inner diameter of the neck 6 of the outer tube 2 decrease in the direction of the respective outlet end too small. This slight conicity, which in injection molded parts in the In view of the demolding, ensures in the present case that the Pressing the inner neck 7 in the outer neck 6 required force with increasing Pressing increases slightly less than it is at the same external or Inside diameters would be the case.
  • the outer diameter of the inner neck 7 at the height however, the uppermost of the ribs 9 including the same is still larger than that Inner diameter of the outer neck 6 at its lower beginning, so that already the uppermost the ribs 9 must be bent down during pressing to the bottom of the grooves 8 to be able to engage.
  • the inner tube 3 has two mutually perpendicular axes of symmetry, so that its neck 7 has four circumferential segments with ribs 9, four ribs 10 and four circumferential segments 18 without ribs.
  • the neck 7 is not hollow cylindrical shaped, but in the area his rib-free peripheral segments 18 concave inwardly recessed to the Cross-section of there in the final assembly state of the cartridge 1 together with the neck 6 of the Outside tube formed vertical outlet channels for the extrusion of the cartridge 1 to enlarge. This results in a substantially cross-shaped cross section of the neck. 7 of the inner tube 3, which is also the outlet channel 20 of the interior 5 of the inner tube.
  • 3 located component applies.
  • the Ribs about 35% of the final assembly between the inside of the outer neck. 6 and the outside of the inner neck 7 lying cross-sectional area covered.
  • the Covered area of the cross section may also be much larger or smaller.
  • the substantially radially extending end wall 19 of the inner tube 3 extends in Area of the upwardly projecting ribs 10 flange over the mantle surface the inner tube 3 and therefore also has substantially the shape of a cross on. As a result, a correspondingly greater length of the ribs 10 is made possible by the a correspondingly more stable support of the inner tube 3 on the end wall 12 of the Outer tube 2 is reached.
  • FIG. 3A and 3B 3A shows the final assembly state of the cartridge 101 and Fig. 3B shows a side view of the inner tube 103 analogous to Fig. 2A.
  • the shape of the outer tube 102 coincides as much as possible that of the first embodiment described above.
  • Outer tube 102 has the inner tube 103 as compared with the first embodiment larger diameter, but that does not matter.
  • the main difference in contrast to the first embodiment is in the form of ribs 109 at the Outside of the neck 107 of the inner tube 103 and in the form adapted to this the grooves 108 on the inside of the neck 106 of the outer tube 102nd
  • the ribs extend in the unmounted state of Inner tube 103 is not in each case in a plane whose normal direction, the axial direction of the Cartridge 1, but the ribs 109 form on the outside of the neck 107 a Screw thread. Accordingly, the grooves 108 in the neck 106 form a matching one Inner thread. Although in the second embodiment after injection molding a Forced removal of the grooves 108 is intended, their depth is in the same Magnitude as in the first embodiment. Alternatively, the grooves 108 may be removed from the mold by unwinding, giving a greater depth of the grooves 108 as well an edgy profile of the same allows.
  • the ribs 109 are thicker in the axial direction of the cartridge 101 than in the first Embodiment and in contrast to this is not intended when mounting the Cartridge 101 to be brought into a deformation state, they in the final Permanently maintain mounting condition. Rather, the ribs 109 are either at all not significantly deformed, which is the case when the connection between the Outer tube 102 and the inner tube 103 by screwing the formed by the ribs 109 External thread is made in the internal thread formed by the grooves 108, or the Neck 107 of the inner tube 103, as in the first embodiment in the neck 106 of the Outer tube 102 is pressed, resulting in temporary elastic deformations and snap over the threads several times before moving to the final position of the two Snap tubes 102 and 103 into place.
  • the latter mounting method sets obviously preceded by a relatively small depth of at least one of the two threads, wherein preferably the internal thread formed by the grooves 109 is laid out so flat, that it is demoldable by forced removal.
  • the construction of the second embodiment largely corresponds that of the first, so that a renewed explanation of the other Design features such as the ribs 110 acting as axial stops and the vertical outlet channels creating rib-free circumferential segments 118 of the neck 107, can be waived.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Tubes (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)

Abstract

An outer tube and an inner tube (103) are respectively provided with the locking components in the necks (107). The locking components of the outer and inner tubes are respectively formed with the successive channels and the successive ribs (109,110) in an axial direction. The outer diameter of the neck of the inner tube with the ribs is almost equal to the clearance diameter of the channel of the outer tube.

Description

Die Erfindung betrifft eine Koaxial-Zweikomponentenkartusche nach dem Oberbegriff des Anspruchs 1.The invention relates to a coaxial two-component cartridge according to the preamble of Claim 1.

Derartige Koaxial-Zweikomponentenkartuschen werden vorteilhaft so hergestellt, daß das Außenrohr und das Innenrohr separat hergestellt werden. Die beiden Rohre müssen dann nachträglich zusammengesteckt werden um eine Koaxialkartusche zu erhalten. Es muß durch eine geeignete Verrastung sichergestellt werden, daß das Innenrohr fest mit dem Außenrohr verankert wird. Ein Lösen des Innenrohres beim Transport und beim Abfüllen der Kartusche muß verhindert werden. Schon ein nicht gut befestigtes, insbesondere nicht mehr zentrisch angeordnetes Innenrohr kann beim automatischen Abfüllen Probleme bereiten, indem die Abfüllvorrichtung das Innenrohr nicht mehr findet. Ferner wirkt beim Auspressen der Kartusche der sich aufbauende Innendruck in der Kartusche auch auf den Boden des Innenrohres, was bei einer ungenügenden Verankerung dazu führen kann, daß sich das Innenrohr löst und so die Kartusche nicht mehr auspreßbar ist.Such coaxial two-component cartridges are advantageously prepared so that the Outer tube and the inner tube are manufactured separately. The two pipes must then be subsequently joined together to obtain a coaxial cartridge. It has to go through a suitable latching be ensured that the inner tube fixed to the outer tube anchored. A loosening of the inner tube during transport and filling of the cartridge must be prevented. Already a not well fastened, in particular no longer centric arranged inner tube can cause problems in automatic filling by the Filling device no longer finds the inner tube. Furthermore, acts when squeezing the Cartridge of the building up internal pressure in the cartridge also on the floor of the Inner tube, which can lead to an insufficient anchoring, that the Inner tube dissolves and so the cartridge is no longer auspreßbar.

Gemäß dem Gebrauchsmuster DE 298 07 938 U1 sind zweiteilige Koaxialkartuschen aus Kunststoff bekannt. Dabei wird das Verrasten durch einen in einer Ebene liegenden Absatz im Halsbereich des Außenrohres und zugehörige Rastnasen am Innenrohr gelöst. Der Absatz im Außenrohr wird werkzeugtechnisch so gelöst, daß im Bereich des Absatzes eine Trennebene vorgesehen ist. Beim Entformen wird dabei der in das Rohr greifende Werkzeugteil oberhalb der Trennebene nach oben entformt und der in das Rohr greifende Werkzeugteil unterhalb der Trennebene nach unten entformt. Mit dieser Methode ist es möglich einen Absatz mit beliebiger Breite herzustellen, so daß die Rastnasen einwandfrei eingreifen und halten können. Da eine Entformung von beiden Seiten erfolgen muß, ist es mit diesem Konzept aber nicht möglich, eine Kartusche mit angespritztem einteilig mit dem Außenrohr verbundenen Verschluß herzustellen. Es braucht vielmehr eine zusätzliche Verschlußkappe die einen Mehraufwand an Herstellkosten und Montagekosten bedeutet.According to the utility model DE 298 07 938 U1 two-part coaxial cartridges are made Plastic known. In this case, the locking by a lying in a plane paragraph solved in the neck region of the outer tube and associated locking lugs on the inner tube. Paragraph in the outer tube is solved by technical tools so that in the area of the paragraph Dividing plane is provided. When demolding is the cross-reaching into the pipe Mold part above the dividing plane upwardly demolded and the cross-cutting into the pipe Molded part undressed below the parting line downwards. It is with this method possible to produce a paragraph with any width, so that the locking lugs properly can intervene and hold. Since a removal from both sides must be done, it is with This concept but not possible, a cartridge with molded einteilig with the Make outer tube connected closure. It needs rather an additional Cap that means an additional cost of manufacturing and assembly costs.

Grundsätzlich kann der Absatz auch als Hinterschneidung von hinten entformt werden, so daß die Kartusche geschlossen mit angespritztem Verschlußdeckel hergestellt werden kann. Da die Hinterschneidung dabei zwangsentformt werden muß, kann der Absatz nicht scharfkantig ausgeführt werden und die Breite des Absatzes ist auf wenige Zehntel-Millimeter begrenzt. Dies führt zu einer stark reduzierten, potentiell ungenügenden Haltekraft.Basically, the paragraph can be removed from the back as an undercut, so that The cartridge can be made closed with molded cap. There the undercut must be forcibly demolished, the paragraph can not sharp-edged be executed and the width of the paragraph is limited to a few tenths of a millimeter. This leads to a greatly reduced, potentially insufficient holding power.

Gemäß der DE 199 43 877 A1 ist eine zweiteilige Koaxialkartusche bekannt, bei der das Innenrohr aus Aluminium hergestellt ist. Am Innenrohr sind sägezahnförmige Rippen angebracht. Die Aluminiumsägezähne, graben sich beim Einpressen in das aus Kunststoff bestehende, weiche Außenrohr ein und bilden so eine feste Verankerung. Der Nachteil dieser Lösung liegt darin, daß der Einsatz von Aluminiumrohren teuer ist, und eine Kartusche bestehend aus Metall und Kunststoff bei der Entsorgung ökologisch problematisch ist.According to DE 199 43 877 A1 a two-part coaxial cartridge is known in which the Inner tube is made of aluminum. On the inner tube are sawtooth ribs appropriate. The aluminum saw teeth dig into plastic when pressed into place existing, soft outer tube and thus form a solid anchorage. The disadvantage of this Solution is that the use of aluminum pipes is expensive, and a cartridge consisting of metal and plastic in disposal ecologically problematic.

In Anbetracht dieses Standes der Technik ist es die Aufgabe der Erfindung, eine zweiteilige Koaxialkartusche zu schaffen, die aus kostengünstigem Kunststoff herstellbar ist, sich für einen geschlossenen, mit der Kartusche einteilig verbundenen und durch Abreißen, Aufschneiden oder Abbrechen zu öffnenden Auslaß eignet, und bei der die Verankerung des Innenrohres sicher hält und eine zentrische Positionierung desselben gewährleistet wird.In view of this prior art, it is the object of the invention, a two-part To create coaxial cartridge, which is made of inexpensive plastic, suitable for a closed, integrally connected to the cartridge and by tearing, Cutting or Cancel openable outlet is suitable, and the anchoring of the Inner tube securely holds and a centric positioning of the same is guaranteed.

Die Aufgabe wird erfindungsgemäß durch die im Anspruch 1 angegebenen Merkmale gelöst. Vorteilhafte Weiterbildungen der Erfindung sind den Unteransprüchen zu entnehmen.The object is achieved by the features specified in claim 1. Advantageous developments of the invention can be found in the dependent claims.

Durch die Erfindung wird erreicht, daß sich die Haltekraft zur Fixierung des Innenrohres gegenüber dem Außenrohr durch eine tannenbaumartige Rippenstruktur an der Außenseite des Halses des Innenrohres auf eine Vielzahl von Rillenflanken auf der Innenseite des Halses des Außenrohres und damit gleichmäßig über einen signifikanten Teil der Länge beider Hälse verteilt. Dies gewährleistet einen festen Sitz der Verbindung und eine stabile koaxiale Position beider Rohre relativ zueinander auch bei einer nur geringen Rillentiefe und einer abgerundeten Form der Rillen.By the invention it is achieved that the holding force for fixing the inner tube opposite the outer tube by a fir-tree-like rib structure on the outside the neck of the inner tube on a plurality of groove flanks on the inside of the neck of the outer tube and thus evenly over a significant part of the length of both necks distributed. This ensures a tight fit of the connection and a stable coaxial Position of both tubes relative to each other even with a small groove depth and a rounded shape of the grooves.

Dabei kann das Innenprofil des Außenrohres, welches eine Vielzahl von aufeinanderfolgenden Rillen aufweist, vorteilhaft im Spritzgußverfahren mit abschließender Entformung in einer einzigen Richtung, nämlich entgegengesetzt zur späteren Einbaurichtung des Innenrohres, hergestellt werden. Bei einer geringen Rillentiefe ist eine Zwangsentformung, bei einer Ausbildung der Rillen als Gewinde auch ein Ausspindeln möglich. In this case, the inner profile of the outer tube, which a variety of Having successive grooves, advantageously in the injection molding with final Removal in a single direction, namely opposite to the later installation direction of the inner tube. At a small groove depth is a Forced removal, with a formation of the grooves as a thread and a spindles possible.

Die Verbindung der beiden Rohre kann durch axiales Einpressen ausgeführt werden, wobei die Rippen entgegen der Einbaurichtung zurück gebogen werden und dauerhaft im solchermaßen verformten Zustand verbleiben, um eine axiale Haltekraft auf das Innenrohr auszuüben. Bei einer Ausführung der Rillen und Rippen als zueinander passende Gewinde kann die Verbindung auch durch Eindrehen hergestellt werden, wobei sich die Haltekraft aus der Schraubverbindung ergibt.The connection of the two tubes can be carried out by axial pressing, wherein the ribs are bent back against the installation direction and permanently in the thus deformed state remain to an axial holding force on the inner tube exercise. In an embodiment of the grooves and ribs as mating thread the connection can also be made by screwing in, whereby the holding force the screw results.

Nachfolgend werden Ausführungsbeispiele der Erfindung anhand der Zeichnungen erläutert. In diesen zeigt

Fig. 1A
eine erste Ausführungsform einer erfindungsgemäßen Kartusche im Längsschnitt während der Montage vor der Verrastung der Hälse von Innen- und Außenrohr,
Fig. 1B
die erste Ausführungsform im fertig montierten Zustand,
Fig. 2A
eine Seitenansicht des Innenrohres der ersten Ausführungsform,
Fig. 2B
eine Querschnittsansicht entlang der Linie A-A in Fig. 2A,
Fig. 3A
eine zweite Ausführungsform einer erfindungsgemäßen Kartusche mit gewindeförmigen Rastelementen im fertig montierten Zustand im Längsschnitt, und
Fig. 3B
eine Seitenansicht des Innenrohres der zweiten Ausführungsform.
Hereinafter, embodiments of the invention will be explained with reference to the drawings. In these shows
Fig. 1A
a first embodiment of a cartridge according to the invention in longitudinal section during assembly prior to locking the necks of inner and outer tube,
Fig. 1B
the first embodiment in the fully assembled state,
Fig. 2A
a side view of the inner tube of the first embodiment,
Fig. 2B
a cross-sectional view along the line AA in Fig. 2A,
Fig. 3A
A second embodiment of a cartridge according to the invention with thread-shaped locking elements in the assembled state in the longitudinal section, and
Fig. 3B
a side view of the inner tube of the second embodiment.

Nach einer ersten, in den Figuren 1A und 1B dargestellten Ausführungsform umfaßt eine erfindungsgemäße Zweikomponentenkartusche 1 ein zylindrisches Außenrohr 2 und ein ebensolches Innenrohr 3. Beim Gebrauch der Kartusche 1 sind die beiden Rohre koaxial zueinander angeordnet und definieren hierdurch einen Zwischenraum 4 in Form eines Hohlzylinders, in dem sich eine der beiden zum gleichzeitigen Auspressen aus der Kartusche 1 bestimmten Komponenten eines Klebstoffs oder dergleichen befindet. Die andere Komponente enthält der Innenraum 5 des Innenrohres 3. Das Außenrohr 2 und das Innenrohr 3 werden separat hergestellt und miteinander verbunden, bevor die Kartusche 1 mit den beiden Komponenten befüllt wird. According to a first embodiment illustrated in FIGS. 1A and 1B, one comprises Inventive two-component cartridge 1, a cylindrical outer tube 2 and a same inner tube 3. When using the cartridge 1, the two tubes are coaxial arranged to each other and thereby define a gap 4 in the form of a Hollow cylinder, in which one of the two for simultaneous squeezing out of the cartridge 1 certain components of an adhesive or the like. The other Component contains the interior 5 of the inner tube 3. The outer tube 2 and the inner tube 3 are manufactured separately and connected together before the cartridge 1 with the two components is filled.

Fig. 1A zeigt den Zustand nach dem Einführen des Innenrohres 3 in das Außenrohr 2, jedoch vor der Herbeiführung einer mechanischen Verbindung der beiden Rohre 2 und 3. Fig. 1B zeigt den Zustand, in dem die beiden Rohre fest miteinander verbunden sind und zum Einfüllen der beiden Komponenten bereit sind. Da die Bestandteile der beiden Rohre 2 und 3 in den Figuren 1A und 1B identisch sind, sind nicht alle Bezugszahlen in beiden Figuren eingetragen.Fig. 1A shows the state after insertion of the inner tube 3 in the outer tube 2, however before bringing about a mechanical connection of the two tubes 2 and 3. FIG. 1B shows the state in which the two tubes are firmly connected to each other and to Filling the two components are ready. Since the components of the two tubes 2 and 3 are identical in Figures 1A and 1B, not all reference numerals are in both figures entered.

Die mechanische Verbindung der beiden Rohre 2 und 3 erfolgt im Bereich der die Auslaßkanäle für die beiden Komponenten bildenden Hälse 6 bzw. 7. Hierzu weist der Hals 6 des Außenrohres 2 in seinem unteren Bereich an der Innenseite eine Vielzahl von gleichartigen Rillen 8 auf, die äquidistant in Axialrichtung aufeinanderfolgen. Die Tiefe der Rillen 8 ist so bemessen, daß bei der Herstellung im Spritzguß noch eine Zwangsentformung an der Innenseite des Halses 6 möglich ist. Die Rillen 8 erstrecken sich in Axialrichtung ausgehend vom unteren Ende des Halses 6 über etwas mehr als dessen untere Hälfte. Sie liegen in zueinander parallelen Ebenen, deren Normalenrichtung jeweils die Axialrichtung der Kartusche 1 ist.The mechanical connection of the two tubes 2 and 3 takes place in the region of the Outlet channels for the two components forming necks 6 and 7. For this purpose, the neck. 6 of the outer tube 2 in its lower region on the inside a plurality of similar grooves 8, which follow each other equidistantly in the axial direction. The depth of the Grooves 8 is dimensioned such that in the production by injection molding still a forced removal on the inside of the neck 6 is possible. The grooves 8 extend in the axial direction starting from the lower end of the neck 6 over slightly more than the lower half. she lie in mutually parallel planes whose normal direction in each case the axial direction of Cartridge 1 is.

Als Gegenstück zu den Rillen 8 an der Innenseite des Halses 6 des Außenrohres 2 weist der Hals 7 des Innenrohres 3 an seiner Außenseite eine Vielzahl von gleichartigen, einstückig angeformten Rippen 9 auf, die ebenfalls äquidistant in Axialrichtung aufeinanderfolgen. Dabei entspricht das axiale Rastermaß der Rippen 9 demjenigen der Rillen 8. Der Außendurchmesser des Halses 7 des Innenrohres 3 einschließlich der Rippen 9 ist größer als der lichte Durchmesser der Rillen 8. Die axiale Länge des Bereiches des Halses 7 des Innenrohres 3, über den sich die Rippen 9 erstrecken, entspricht etwa der axialen Länge des Bereiches des Halses 6 des Außenrohres 23, über den sich die Rillen 8 erstrecken, d.h. die Anzahl der Rippen 9 stimmt zumindest annähernd mit der Anzahl der Rillen 8 überein, wobei es aber nicht auf eine exakte Übereinstimmung ankommt. Die Anzahl der Rillen 8 und Rippen 9 liegt zwischen 10 und 15, und beträgt bei dem in den Figuren 1A und 1B dargestellten Beispiel 13.As a counterpart to the grooves 8 on the inside of the neck 6 of the outer tube 2, the Neck 7 of the inner tube 3 on its outside a variety of similar, one-piece molded ribs 9, which also follow each other equidistantly in the axial direction. The axial spacing of the ribs 9 corresponds to that of the grooves 8 Outer diameter of the neck 7 of the inner tube 3 including the ribs 9 is greater than the clear diameter of the grooves 8. The axial length of the area of the neck 7 of the Inner tube 3, over which the ribs 9 extend, corresponds approximately to the axial length of the Area of the neck 6 of the outer tube 23, over which the grooves 8 extend, i. the Number of ribs 9 is at least approximately coincident with the number of grooves 8, wherein But it does not depend on an exact match. The number of grooves 8 and ribs 9 is between 10 and 15, and is as shown in Figs. 1A and 1B Example 13.

Wie Fig. 1B erkennen läßt, sind die Rillen 8 und Rippen 9 dazu bestimmt, miteinander in Eingriff zu gelangen, wenn das Innenrohr 3 bis zum Anschlag in das Außenrohr 2 eingeschoben wird. Dieser Anschlag wird durch andere Rippen 10 festgelegt, die sich vom unteren Ende des Halses 7 des Innenrohres 3 ausgehend entlang dessen Außenseite in ungefähr radialer Richtung erstrecken. Diese Rippen 10 sind in ihrer Form an die Kontur der Innenoberfläche des Außenrohres 2 im Bereich des Übergangs 11 von einer zumindest annähernd radial verlaufenden Stirnwand 12 desselben zum Hals 6 angepaßt. Über den Umfang des Innenrohres 3 sind mindestens drei, in dem gezeigten Beispiel vier Rippen 10 gleichmäßig verteilt. Dabei definiert die Höhe der Rippen 10 die Höhe des Durchlaßkanals, durch den die in dem hohlzylindrischen Zwischenraum 4 zwischen dem Außenrohr 2 und dem Innenrohr 3 befindliche Komponente beim Auspressen der Kartusche 1 radial in Richtung der Hälse 6 und 7 fließt.As can be seen Fig. 1B, the grooves 8 and ribs 9 are intended to be in each other Engage when the inner tube 3 until it stops in the outer tube. 2 is inserted. This stop is determined by other ribs 10, which differ from the lower end of the neck 7 of the inner tube 3, starting along the outside in extend approximately radially. These ribs 10 are in shape to the contour of the Inner surface of the outer tube 2 in the region of the transition 11 of at least one approximately radially extending end wall 12 of the same adapted to the neck 6. On the The circumference of the inner tube 3 is at least three, in the example shown four ribs 10th equally distributed. The height of the ribs 10 defines the height of the passage channel, by the in the hollow cylindrical space 4 between the outer tube 2 and the Inner tube 3 located component when pressing the cartridge 1 radially in the direction of Necks 6 and 7 are flowing.

Wenn, wie es in Fig. 1B dargestellt ist, die Rippen 10 an dem Übergang 11 und der annähernd radialen Stirnwand 12 von innen anliegen, ragt das obere Ende 13 des Halses 7 des Innenrohres 3 in eine dafür vorgesehene innenseitige Ringnut 14 des einstückig mit dem Hals 6 des Außenrohres 2 verbundenen Deckels 15 der Kartusche 1. Hierdurch wird der Innenraum 5 des Innenrohres 3 gegenüber dem hohlzylindrischen Zwischenraum 4 zwischen den beiden Rohren 2 und 3 abgedichtet, so daß die in den Räumen 4 und 5 befindlichen beiden Komponenten in der Kartusche 1 nicht miteinander in Kontakt kommen und reagieren können. Die in den Figuren 1A und 1B an der Außenseite des äußeren Halses 6 sichtbaren Rippen 16 stellen ein Gewinde dar, das zum Aufschrauben einer Verschlußkappe zwecks Wiederverschließens einer benutzten Kartusche 1 oder eines Statikmischers zum Mischen der beiden Komponenten vorgesehen ist und mit der vorliegenden Erfindung nicht in Zusammenhang steht.When, as shown in Fig. 1B, the ribs 10 at the transition 11 and the approximately abut radial end wall 12 from the inside, the upper end 13 of the neck 7 of the projecting Inner tube 3 in a designated inner side annular groove 14 of the integral with the neck 6 of the outer tube 2 connected lid 15 of the cartridge 1. As a result, the interior 5 of the inner tube 3 with respect to the hollow cylindrical space 4 between the two Tubes 2 and 3 sealed so that the located in the rooms 4 and 5 two Components in the cartridge 1 do not come in contact and react can. The visible in the figures 1A and 1B on the outside of the outer neck 6 Ribs 16 represent a thread for screwing a cap for the purpose Reclosing a used cartridge 1 or a static mixer for mixing the Both components are provided and not included in the present invention Context stands.

Die axiale Dicke der Rippen 9 an der Außenseite des Innenrohres 3 ist im Verhältnis zu ihrer radialen Länge so ausgelegt, daß die Rippen sich bei Ausübung einer vorbestimmten Axialkraft auf das Innenrohr 3 in der in Fig. 1A gezeigten Position soweit nach unten biegen, daß der Hals 7 des Innenrohres 3 in den Hals 6 des Außenrohres 2 hineingleiten kann, bis die zuvor erläuterte, in Fig. 1B dargestellte Anschlagposition erreicht wird.The axial thickness of the ribs 9 on the outside of the inner tube 3 is in relation to their Radial length designed so that the ribs when exercising a predetermined Bending the axial force on the inner tube 3 downwards in the position shown in FIG. 1A, that the neck 7 of the inner tube 3 can slide into the neck 6 of the outer tube 2 until the previously explained, shown in Fig. 1B stop position is achieved.

Zur axialen Zentrierung des Halses 7 des Innenrohres 3 gegenüber dem Hals 6 des Außenrohres 2 sind oberhalb der Rippen 10 mehrere, d.h. mindestens drei, im gezeigten Beispiel vier Nasen 17 einstückig an den Hals 7 angeformt, die eine schräge Außenoberfläche aufweisen. Passend hierzu ist der Übergang 11 des Außenrohres 2 zu seinem Hals 6 an der Innenseite ebenfalls abgeschrägt, so daß in einer nichtzentrischen Position der beiden Rohre 2 und 3 zueinander bei axialer Kraftbeaufschlagung des Innenrohres 3 die schräge Außenoberfläche derjenigen Nase 17, welche zuerst mit dem Außenrohr 2 in Kontakt gelangt, auf besagter abgeschrägter Innenseite des Übergangs 11 entlang gleiten und sich das Innenrohr 3 in Richtung auf die zentrische Position bewegen kann.For axial centering of the neck 7 of the inner tube 3 relative to the neck 6 of the Outer tube 2 are above the ribs 10 more, i. at least three, in the shown Example, four lugs 17 integrally formed on the neck 7, which has an oblique outer surface exhibit. Fits to this, the transition 11 of the outer tube 2 to his neck 6 at the Inside also bevelled so that in a non-centric position of the two tubes. 2 and 3 to each other in axial force loading of the inner tube 3, the oblique Outer surface of that lug 17, which first comes into contact with the outer tube 2, slide on said beveled inside of the transition 11 along and the Inner tube 3 can move in the direction of the centric position.

Fig. 1B zeigt rechts oben auch einen vergrößerten Ausschnitt des Bereiches der beiden Hälse 6 und 7, in dem das Außenrohr 2 und das Innenrohr 3 durch die Wirkung der Rippen 9 im endgültig montierten Zustand der Kartusche 1 miteinander verbunden sind. Darin ist deutlich erkennbar, daß die Rippen 9 aufgrund ihrer Länge, welche die lichte Weite der Rillen 8 etwas übersteigt, nach dem Einpressen des Halses 7 des Innenrohres 3 in den Hals 6 des Außenrohres 2 nicht mehr in radialer Richtung nach außen stehen, sondern demgegenüber etwas geneigt sind, und zwar rückwärts bezüglich Einbaurichtung, d.h. der Bewegungsrichtung des Innenrohres 3 bei besagtem Einpressen. Die Neigung der Rippen 9 im Endmontagezustand der Kartusche 1 ist vergleichbar mit derjenigen der Äste eines Tannenbaumes, wobei jede Rippe 9 in eine Rille 8 eingerastet ist und sich mit ihrem Ende in dieser, d.h. insbesondere an deren unterer Flanke abstützt. Das Ausmaß der Neigung hängt davon ab, um wieviel der Außendurchmesser des Halses 7 einschließlich der Rippen 9 die lichte Weite der Rillen 8 übersteigt.Fig. 1B also shows an enlarged detail of the region of the two necks on the top right 6 and 7, in which the outer tube 2 and the inner tube 3 by the action of the ribs 9 in finally assembled state of the cartridge 1 are interconnected. This is clear recognizable that the ribs 9 due to their length, which is the inside width of the grooves 8 something exceeds, after pressing the neck 7 of the inner tube 3 in the neck 6 of the Outside tube 2 are no longer in the radial direction outward, but in contrast are slightly inclined, and in reverse with respect to installation direction, i. of the Direction of movement of the inner tube 3 at said pressing. The inclination of the ribs 9 in the final assembly state of the cartridge 1 is comparable to that of the branches of a Tannenbaumes, each rib 9 is engaged in a groove 8 and with its end in this, i. especially supported on the lower flank. The extent of the inclination depends depending on how much the outer diameter of the neck 7 including the ribs 9 the clear width of the grooves 8 exceeds.

Aus der Detailvergrößerung in Fig. 1B ist auch ersichtlich, daß das Oberflächenprofil der Innenseite des äußeren Halses 6 keine scharfen Kanten aufweist, sondern die Übergänge in die Rillen 9 sowie diese selbst einen glatten Verlauf haben. Dies ist durch die Notwendigkeit der Zwangsentformung bei der Herstellung im Spritzguß bedingt.It can also be seen from the detail enlargement in FIG. 1B that the surface profile of the Inside of the outer neck 6 has no sharp edges, but the transitions in the grooves 9 and these themselves have a smooth course. This is due to the need the compulsory removal in the production by injection molding.

Bei einer Beaufschlagung des Innenrohres 3 mit einer axialen Kraft entgegen der seiner Einbaurichtung vermögen die Rippen 9 aufgrund ihrer Neigung eine große axiale Kraftkomponente auf die unteren Rillenflanken zu übertragen und verhindern dadurch zuverlässig eine Ausrastung, d.h. Lösung der Verbindung.When an impact of the inner tube 3 with an axial force against his Installation direction wealth the ribs 9 due to their inclination a large axial To transmit force component to the lower groove flanks and thereby prevent reliably a disengagement, i. Solution of the connection.

Eine Seitenansicht des Innenrohres 3 der Kartusche 1 im unmontierten Ausgangszustand ist in Fig. 2A vergrößert dargestellt. Darin sind die beiden Arten von Rippen 9 und 10 sowie die Nasen 17 noch deutlicher sichtbar als in der Querschnittsansicht der beiden Montagephasen in den Figuren 1A und 1B. Insbesondere zeigt Fig. 2A auch, daß die Rippen 9 nicht ringförmig um den gesamten Hals des Innenrohres 3 herum verlaufen, sondern in Umfangsrichtung einzelne Segmente bilden, zwischen denen sich jeweils rippenfreie Segmente 18 befinden. Letztere bilden im Endmontagezustand der Kartusche 1 vertikale Kanäle zwischen den beiden Hälsen 6 und 7, durch welche die in dem Zwischenraum 4 zwischen dem Außenrohr 2 und dem Innenrohr 3 befindliche Komponente beim Auspressen der Kartusche 1 fließen kann. Dabei kommt es nicht auf einen genau vertikalen Verlauf dieser Kanäle an, sondern nur darauf, daß für besagte Komponente irgendwelche Durchlässe in vertikaler Richtung, die beispielsweise auch schraubenlinienförmig verlaufen könnten, vorhanden sind.A side view of the inner tube 3 of the cartridge 1 in the unmounted initial state is in Fig. 2A shown enlarged. Therein are the two types of ribs 9 and 10 and the Noses 17 even more clearly visible than in the cross-sectional view of the two mounting phases in Figures 1A and 1B. In particular, Fig. 2A also shows that the ribs 9 are not annular run around the entire neck of the inner tube 3 around, but in the circumferential direction form individual segments, between each of which rib-free segments 18 are located. The latter form in the final assembly state of the cartridge 1 vertical channels between the two Necks 6 and 7, through which in the space 4 between the outer tube 2 and the inner tube 3 located component during the extrusion of the cartridge 1 can flow. It does not depend on an exactly vertical course of these channels, but only in that for said component any passages in the vertical direction, the for example, could also be helical, are present.

Der Außendurchmesser des Halses 7 des Innenrohres 3 einschließlich der Rippen 9 sowie der Innendurchmesser des Halses 6 des Außenrohres 2 verringern sich in Richtung auf das jeweilige Auslaßende zu geringfügig. Diese leichte Konizität, die bei Spritzgußteilen im Hinblick auf die Entformung bekannt ist, sorgt in vorliegenden Fall dafür, daß die zum Einpressen des inneren Halses 7 in den äußeren Hals 6 benötigte Kraft mit zunehmender Einpreßtiefe etwas weniger stark zunimmt, als es bei gleichbleibenden Außen- bzw. Innendurchmessern der Fall wäre. Der Außendurchmesser des inneren Halses 7 auf der Höhe der obersten der Rippen 9 einschließlich derselben ist jedoch noch immer größer als der Innendurchmesser des äußeren Halses 6 an seinem unteren Anfang, so daß bereits die oberste der Rippen 9 beim Einpressen nach unten gebogen werden muß, um in die unterste der Rillen 8 einrasten zu können.The outer diameter of the neck 7 of the inner tube 3 including the ribs 9 and the Inner diameter of the neck 6 of the outer tube 2 decrease in the direction of the respective outlet end too small. This slight conicity, which in injection molded parts in the In view of the demolding, ensures in the present case that the Pressing the inner neck 7 in the outer neck 6 required force with increasing Pressing increases slightly less than it is at the same external or Inside diameters would be the case. The outer diameter of the inner neck 7 at the height however, the uppermost of the ribs 9 including the same is still larger than that Inner diameter of the outer neck 6 at its lower beginning, so that already the uppermost the ribs 9 must be bent down during pressing to the bottom of the grooves 8 to be able to engage.

Aus der in Fig. 2B gezeigten Querschnittsansicht entlang der Linie A-A in Fig. 2A ist zu ersehen, daß das Innenrohr 3 zwei zueinander senkrechte Symmetrieachsen aufweist, so daß sein Hals 7 vier Umfangssegmente mit Rippen 9, vier Rippen 10 und vier Umfangssegmente 18 ohne Rippen aufweist. Der Hals 7 ist nicht hohlzylindrisch geformt, sondern im Bereich seiner rippenfreien Umfangssegmente 18 konkav nach innen eingebuchtet, um den Querschnitt der dort im Endmontagezustand der Kartusche 1 zusammen mit dem Hals 6 des Außenrohres gebildeten vertikalen Auslaßkanäle für das Auspressen der Kartusche 1 zu vergrößern. Hierdurch ergibt sich ein im wesentlichen kreuzförmiger Querschnitt des Halses 7 des Innenrohres 3, was auch für den Auslaßkanal 20 der im Innenraum 5 des Innenrohres 3 befindlichen Komponente gilt. Bei dem dargestellten Ausführungsbeispiel wird durch die Rippen ca. 35 % der im Endmontagezustand zwischen der Innenseite des äußeren Halses 6 und der Außenseite des inneren Halses 7 liegenden Querschnittsfläche abgedeckt. Die abgedeckte Fläche vom Querschnitt kann aber auch wesentlich größer oder kleiner sein. From the cross-sectional view shown in Fig. 2B along the line A-A in Fig. 2A is to see that the inner tube 3 has two mutually perpendicular axes of symmetry, so that its neck 7 has four circumferential segments with ribs 9, four ribs 10 and four circumferential segments 18 without ribs. The neck 7 is not hollow cylindrical shaped, but in the area his rib-free peripheral segments 18 concave inwardly recessed to the Cross-section of there in the final assembly state of the cartridge 1 together with the neck 6 of the Outside tube formed vertical outlet channels for the extrusion of the cartridge 1 to enlarge. This results in a substantially cross-shaped cross section of the neck. 7 of the inner tube 3, which is also the outlet channel 20 of the interior 5 of the inner tube. 3 located component applies. In the illustrated embodiment is by the Ribs about 35% of the final assembly between the inside of the outer neck. 6 and the outside of the inner neck 7 lying cross-sectional area covered. The Covered area of the cross section may also be much larger or smaller.

Die im wesentlichen radial verlaufende Stirnwand 19 des Innenrohres 3 erstreckt sich im Bereich der von ihr aus nach oben ragenden Rippen 10 flanschartig über die Manteloberfläche des Innenrohres 3 hinaus und weist daher ebenfalls im wesentlichen die Form eines Kreuzes auf. Hierdurch wird eine entsprechend größere Länge der Rippen 10 ermöglicht, durch die eine entsprechend stabilere Abstützung des Innenrohres 3 auf der Stirnwand 12 des Außenrohres 2 erreicht wird.The substantially radially extending end wall 19 of the inner tube 3 extends in Area of the upwardly projecting ribs 10 flange over the mantle surface the inner tube 3 and therefore also has substantially the shape of a cross on. As a result, a correspondingly greater length of the ribs 10 is made possible by the a correspondingly more stable support of the inner tube 3 on the end wall 12 of the Outer tube 2 is reached.

Eine zweite Ausführungsform der vorliegenden Erfindung ist in den Figuren 3A und 3B dargestellt, wobei Fig. 3A analog zu Fig. 1B den Endmontagezustand der Kartusche 101 und Fig. 3B analog zu Fig. 2A eine Seitenansicht des Innenrohres 103 zeigt. Die Bezugszeichen einander entsprechender Bestandteile der beiden Ausführungsformen unterscheiden sich stets um die Zahl 100.A second embodiment of the present invention is shown in Figs. 3A and 3B 3A, similar to FIG. 1B, shows the final assembly state of the cartridge 101 and Fig. 3B shows a side view of the inner tube 103 analogous to Fig. 2A. The reference numerals Corresponding components of the two embodiments always differ around the number 100.

Bei der zweiten Ausführungsform stimmt die Form des Außenrohres 102 weitestgehend mit derjenigen der zuvor beschriebenen ersten Ausführungsform überein. Im Verhältnis zum Außenrohr 102 hat das Innenrohr 103 im Vergleich zur ersten Ausführungsform einen größeren Durchmesser, was aber nicht von Bedeutung ist. Der wesentliche Unterschied gegenüber der ersten Ausführungsform liegt vielmehr in der Form Rippen 109 an der Außenseite des Halses 107 des Innenrohres 103 sowie in der auf diese abgestimmten Form der Rillen 108 an der Innenseite des Halses 106 des Außenrohres 102.In the second embodiment, the shape of the outer tube 102 coincides as much as possible that of the first embodiment described above. In relation to Outer tube 102 has the inner tube 103 as compared with the first embodiment larger diameter, but that does not matter. The main difference in contrast to the first embodiment is in the form of ribs 109 at the Outside of the neck 107 of the inner tube 103 and in the form adapted to this the grooves 108 on the inside of the neck 106 of the outer tube 102nd

Wie aus Fig. 3B zu ersehen ist, erstrecken sich die Rippen im unmontierten Zustand des Innenrohres 103 nicht jeweils in einer Ebene, deren Normalenrichtung die Axialrichtung der Kartusche 1 ist, sondern die Rippen 109 bilden an der Außenseite des Halses 107 ein Schraubgewinde. Dementsprechend bilden die Rillen 108 im Hals 106 ein dazu passendes Innengewinde. Wenn auch bei der zweiten Ausführungsform nach dem Spritzgießen eine Zwangsentformung der Rillen 108 beabsichtigt ist, liegt deren Tiefe in der gleichen Größenordnung wie bei der ersten Ausführungsform. Alternativ hierzu können die Rillen 108 auch durch Ausspindeln entformt werden, was eine größere Tiefe der Rillen 108 sowie auch ein kantiges Profil derselben ermöglicht.As can be seen from Fig. 3B, the ribs extend in the unmounted state of Inner tube 103 is not in each case in a plane whose normal direction, the axial direction of the Cartridge 1, but the ribs 109 form on the outside of the neck 107 a Screw thread. Accordingly, the grooves 108 in the neck 106 form a matching one Inner thread. Although in the second embodiment after injection molding a Forced removal of the grooves 108 is intended, their depth is in the same Magnitude as in the first embodiment. Alternatively, the grooves 108 may be removed from the mold by unwinding, giving a greater depth of the grooves 108 as well an edgy profile of the same allows.

Die Rippen 109 sind in der Axialrichtung der Kartusche 101 dicker als bei der ersten Ausführungsform und im Gegensatz zu dieser nicht dazu bestimmt, bei der Montage der Kartusche 101 in einen Verformungszustand gebracht zu werden, den sie im endgültigen Montagezustand dauerhaft beibehalten. Vielmehr werden die Rippen 109 entweder überhaupt nicht nennenswert verformt, was dann der Fall ist, wenn die Verbindung zwischen dem Außenrohr 102 und dem Innenrohr 103 durch Eindrehen des von den Rippen 109 gebildeten Außengewindes in das von den Rillen 108 gebildete Innengewinde hergestellt wird, oder der Hals 107 des Innenrohres 103 wird wie bei der ersten Ausführungsform in den Hals 106 des Außenrohres 102 eingepreßt, wobei es zu vorübergehenden elastischen Verformungen kommt und die Gewindegänge mehrmals überschnappen, bevor sie in der Endposition der beiden Rohre 102 und 103 ineinander einrasten. Die letztgenannte Montagemethode setzt selbstverständlich eine relativ geringe Tiefe zumindest eines der beiden Gewinde voraus, wobei vorzugsweise das durch die Rillen 109 gebildete Innengewinde so flach ausgelegt wird, daß es durch Zwangsentformung entformbar ist.The ribs 109 are thicker in the axial direction of the cartridge 101 than in the first Embodiment and in contrast to this is not intended when mounting the Cartridge 101 to be brought into a deformation state, they in the final Permanently maintain mounting condition. Rather, the ribs 109 are either at all not significantly deformed, which is the case when the connection between the Outer tube 102 and the inner tube 103 by screwing the formed by the ribs 109 External thread is made in the internal thread formed by the grooves 108, or the Neck 107 of the inner tube 103, as in the first embodiment in the neck 106 of the Outer tube 102 is pressed, resulting in temporary elastic deformations and snap over the threads several times before moving to the final position of the two Snap tubes 102 and 103 into place. The latter mounting method sets obviously preceded by a relatively small depth of at least one of the two threads, wherein preferably the internal thread formed by the grooves 109 is laid out so flat, that it is demoldable by forced removal.

Ansonsten entspricht die Konstruktion der zweiten Ausführungsform weitestgehend derjenigen der ersten, so daß auf eine erneute Erläuterung der weiteren Konstruktionsmerkmale, wie der als axiale Anschläge fungierenden Rippen 110 und der vertikale Auslaßkanäle schaffenden, rippenfreien Umfangssegmente 118 des Halses 107, verzichtet werden kann.Otherwise, the construction of the second embodiment largely corresponds that of the first, so that a renewed explanation of the other Design features such as the ribs 110 acting as axial stops and the vertical outlet channels creating rib-free circumferential segments 118 of the neck 107, can be waived.

Aus der vorausgehenden Beschreibung der beiden Ausführungsbeispiele ergeben sich für den Fachmann eine Reihe von Abwandlungen der Erfindung. So kann beispielsweise die Anzahl der Umfangssegmente mit Rippen, deren Länge in Umfangsrichtung im Verhältnis zu den rippenfreien Segmenten, sowie deren Anordnung in Umfangsposition über der Höhe variiert werden. Ebenfalls variierbar sind z. B. auch die Profile der Rippen und der Rillen im Längsschnitt sowie die Länge der mit Rippen bzw. Rillen versehenen Halsabschnitte. Solche und vergleichbare Modifikationen, die im Ermessen des Fachmannes liegen, sollen vom Schutz des Patents umfaßt sein.From the foregoing description of the two embodiments will be apparent to the One skilled in the art will appreciate a number of modifications of the invention. For example, the number the circumferential segments with ribs whose length in the circumferential direction in relation to the rib-free segments, and their arrangement varies in circumferential position above the height become. Also variable z. As well as the profiles of the ribs and the grooves in Longitudinal section and the length of the ribbed or grooved neck sections. Such and comparable modifications, which are at the discretion of the person skilled in the art, are intended to be by the Protection of the patent includes.

Claims (13)

Koaxial-Zweikomponentenkartusche, mit einem Außenrohr und einem separaten Innenrohr, welche sich beide an jeweils einem Ende zu einem jeweiligen Hals verjüngen, wobei die Innenseite des Halses des Außenrohres und die Außenseite des Halses des Innenohres jeweils mit Rastelementen versehen sind, die bei einem koaxialen Einführen des Innenrohres in das Außenrohr so miteinander in Eingriff versetzbar sind, daß sie das Innenrohr gegenüber dem Außenrohr koaxial und in einer vorbestimmten axialen Position fixieren, dadurch gekennzeichnet, daß die Rastelemente des Halses (6; 106) des Außenrohres (2; 102) durch eine Vielzahl von in Axialrichtung aufeinanderfolgenden Rillen (8; 108) und die Rastelemente des Halses (7; 107) des Innenrohres (3; 103) durch eine Vielzahl von in Axialrichtung aufeinanderfolgenden, einstückig an den Hals (7; 107) angeformten Rippen (9; 109) gebildet werden, und daß der Außendurchmesser des Halses (7; 107) des Innenrohres (3; 103) einschließlich der Rippen (9; 109) mindestens so groß ist wie der lichte Durchmesser der Rillen (8; 108).A coaxial two-component cartridge, having an outer tube and a separate inner tube, both tapering at a respective end to a respective neck, wherein the inside of the neck of the outer tube and the outer side of the neck of the inner ear are each provided with locking elements, which in a coaxial insertion of the inner tube into the outer tube are engageable with each other so as to fix the inner tube coaxially and in a predetermined axial position relative to the outer tube, characterized in that the locking elements of the neck (6; 106) of the outer tube (2; A plurality of axially successive grooves (8; 108) and the locking elements of the neck (7; 107) of the inner tube (3; 103) by a plurality of axially successive integrally formed on the neck (7; 107) ribs (9; 109), and that the outer diameter of the neck (7; 107) of the inner tube (3; 103) including the rib (9; 109) is at least as large as the clear diameter of the grooves (8; 108). Koaxial-Zweikomponentenkartusche nach Anspruch 1, dadurch gekennzeichnet, daß die axialen Abstände der Rippen (9; 109) mit den Abständen der Rillen (8; 108) übereinstimmen und somit im montierten Zustand ineinander eingreifen.Coaxial two-component cartridge according to Claim 1, characterized in that the axial spacings of the ribs (9; 109) coincide with the spacings of the grooves (8; 108) and thus engage in one another in the assembled state. Koaxial-Zweikomponentenkartusche nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Anzahl der Rillen (8; 108) gleich oder etwa so groß ist wie die Anzahl der Rippen (9; 109).A coaxial two-component cartridge according to claim 1 or 2, characterized in that the number of grooves (8; 108) is equal to or about the same as the number of ribs (9; 109). Koaxial-Zweikomponentenkartusche nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß sich die Rippen (9; 109) zumindest über die Hälfte der Länge des Halses (7; 107) des Innenrohres (3; 103) erstrecken. Coaxial two-component cartridge according to one of Claims 1 to 3, characterized in that the ribs (9; 109) extend over at least half the length of the neck (7; 107) of the inner tube (3; 103). Koaxial-Zweikomponentenkartusche nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß sich die Rippen (9; 109) entlang des Umfangs des Halses (7; 107) des Innenrohres (3; 103) über eine Vielzahl von einzelnen Segmenten erstrecken, zwischen denen Umfangssegmente (18; 118) ohne Rippen (9; 109) liegen.Coaxial two-component cartridge according to one of claims 1 to 4, characterized in that the ribs (9; 109) extend along the circumference of the neck (7; 107) of the inner tube (3; 103) over a plurality of individual segments between which Circumferential segments (18, 118) without ribs (9, 109) lie. Koaxial-Zweikomponentenkartusche nach Anspruch 5, dadurch gekennzeichnet, daß alle Rippen (9; 109) in Umfangsrichtung relativ zum Durchmesser der zugeordneten Rillen (8; 108) gleich lang und in dieser Richtung zueinander äquidistant angeordnet sind.Coaxial two-component cartridge according to Claim 5, characterized in that all the ribs (9; 109) are arranged equidistantly in the circumferential direction relative to the diameter of the associated grooves (8; 108) and equidistant from one another in this direction. Koaxial-Zweikomponentenkartusche nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß sich die Rippen (9; 109) im unmontierten Zustand des Innenrohres (3; 103) senkrecht zu dessen Mittelachse erstrecken, und daß die Rillen (8; 108) in senkrecht zur Mittelachse des Außenrohres (2; 102) stehenden Ebenen liegen.Coaxial two-component cartridge according to one of claims 1 to 6, characterized in that the ribs (9; 109) in the unassembled state of the inner tube (3; 103) extend perpendicular to the central axis thereof, and in that the grooves (8; lie to the central axis of the outer tube (2; Koaxial-Zweikomponentenkartusche nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß sich der Außendurchmesser des Halses (7; 107) des Innenrohres (3) einschließlich der Rippen (9; 109) sowie der Innendurchmesser des Halses (6; 106) des Außenrohres (2; 102) in Richtung auf das jeweilige Auslaßende zu verringern.Coaxial two-component cartridge according to one of claims 1 to 7, characterized in that the outer diameter of the neck (7; 107) of the inner tube (3) including the ribs (9; 109) and the inner diameter of the neck (6; 106) of the outer tube (2, 102) towards the respective outlet end. Koaxial-Zweikomponentenkartusche nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Außendurchmesser des Innenrohres (3) einschließlich der Rippen (9) größer ist als der lichte Durchmesser der Rillen (8). Coaxial two-component cartridge according to one of claims 1 to 8, characterized in that the outer diameter of the inner tube (3) including the ribs (9) is greater than the clear diameter of the grooves (8). Koaxial-Zweikomponentenkartusche nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß sowohl die Rippen (109), als auch die Rillen (108) als zueinander passende Schraubgewinde ausgebildet sind, mittels derer das Innenrohr (103) mit dem Außenrohr (102) durch Verschraubung verbindbar ist.Coaxial two-component cartridge according to one of claims 1 to 8, characterized in that both the ribs (109) and the grooves (108) are formed as mutually matching screw threads, by means of which the inner tube (103) with the outer tube (102) Screw connection is connectable. Koaxial-Zweikomponentenkartusche nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß beide Rohre (2, 3; 102, 103) im Spritzgußverfahren aus Kunststoff hergestellt sind.Coaxial two-component cartridge according to one of Claims 1 to 10, characterized in that both tubes (2, 3, 102, 103) are produced by injection molding from plastic. Koaxial-Zweikomponentenkartusche nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Rillen (8; 108) durch Zwangsentformung oder durch Ausschrauben von hinten erzeugt werden.Coaxial two-component cartridge according to one of claims 1 to 11, characterized in that the grooves (8; 108) are produced by forced removal or unscrewing from the rear. Koaxial-Zweikomponentenkartusche nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß an dem Außenrohr (2; 102) ein mit diesem einstückiger abschneidbarer, aufreißbarer oder abbrechbarer Verschluß oder Deckel (15) angeordnet ist.Coaxial two-component cartridge according to one of Claims 1 to 12, characterized in that a closure or cover (15) which can be cut off, ruptured or broken off in one piece is arranged on the outer tube (2;
EP04019006A 2003-10-31 2004-08-11 Coaxial two component cartridge Expired - Lifetime EP1528011B1 (en)

Applications Claiming Priority (2)

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DE20316879U 2003-10-31
DE20316879U DE20316879U1 (en) 2003-10-31 2003-10-31 Coaxial two-component cartridge

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EP2258468B1 (en) * 2009-06-05 2012-05-16 Ritter GmbH Mixing system for dual component cartridges
EP2258466A1 (en) * 2009-06-05 2010-12-08 Ritter GmbH Mixing system for dual component cartridges
KR20120028925A (en) 2009-06-16 2012-03-23 술저 믹스팩 아게 Multicomponent cartridge for single use
US20110127296A1 (en) * 2009-11-30 2011-06-02 Jeffrey Marc Hayet Apparatus for simultaneously dispensing two products
NZ728407A (en) * 2014-09-01 2018-08-31 Illinois Tool Works Cartridge for dispensing two-part fluids
EP3677345A1 (en) 2019-01-03 2020-07-08 Sulzer Mixpac AG Coaxial cartridge for multi-component materials and method of assembling a coaxial cartridge
DE102020123944A1 (en) * 2020-09-15 2022-03-17 DIBAU GmbH two-component cartridge

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JP2005132492A (en) 2005-05-26
US20050093300A1 (en) 2005-05-05
DE20316879U1 (en) 2005-03-17
EP1528011B1 (en) 2011-08-03
US7207607B2 (en) 2007-04-24

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