EP2497721B1 - Cartridge comprising several components - Google Patents

Abstract

The discharging device has a multi-component cartridge (1) or a multi-component injection with multiple chambers (2,3), a mixer element (30) formed integrally with the multi-component cartridge and a mixer housing (10). A guide element is formed such that the mixer housing and the mixer element are movable against each other only in an axial direction in the closed position and released position and are movable on the complete path between both the positions.

Description

The invention relates to a discharge device for mixing and discharging multicomponent masses according to the preamble of claim 1.

An apparatus for mixing and dispensing multicomponent masses is disclosed in US Pat DE 102 54 409 A1 described. The device includes a cartridge having at least two parallel cylindrical chambers for receiving the components and a respective piston for squeezing the components. The chambers have outlet openings which are covered and closed by a circular inner surface of a cap. The cap has a curved outlet tube which encloses a mixing coil. The mixing spiral is flexible and curves in each case in the direction of the outlet tube. The mixing helix is fastened to a transverse wall formed on a cylindrical projection of the cartridge head. The transverse wall is held in a recess of the cap against rotation. By pressurizing the components, the cap is lifted out of the closed position and the outlet openings are released, the components emerging from the outlet openings being separated from one another by the transverse wall, so that one component can not readily enter the chamber of the other component. In the open position of the cap, the transverse wall no longer engages in the cap recess, so that the cap and thus also the outlet tube can be rotated in the direction desired by the user. To secure the open as well as the closing position of the cap, the cylindrical projection on an annular bead, which in corresponding recesses can engage, wherein the cap jumps from the closed position to an open position solely by the pressure of the components.

Due to the possibility of rotation of the discharge pipe in a suitable discharge position and the associated use of a flexible mixing spiral, the placement of the cap with the discharge pipe via the mixing spiral is made more difficult. In addition, the structure of the mixing coil is sensitive to mechanical damage, so that the sensitive flexible mixer structure must be carefully inserted into the discharge tube, while at the same time paying attention to the correct seating of the cap on the cylindrical projection. Also, the displacement of the cap between the open and the closed position carries the risk of tilting of the cap and the damage of the mixing helix.

To simplify the placement of a dispensing tube on a multi-component cartridge, is in DE 20 2006 004 738 U1 an output device proposed with an adapter element. In this case, an adapter element is arranged between the syringe body on the one hand and the mixing device on the other hand, wherein the adapter element interchangeable on the syringe body and the mixing means are arranged interchangeable on the adapter element.

The generic DE 10 2007 044 983 A1 describes a discharge device with two containers. The discharge device has a mixer which can be detachably fastened to the containers by means of a coupling device. The mixer is fixed by a rotation of a locking ring which forms the coupling device together with a spring arm on the containers. Closing elements for closing discharge openings of the containers are transferred from a closed position to a dispensing position by the internal pressure in the containers increased and the closure element are pushed out of the discharge openings. It is not possible to bring the closure elements from the issue position back into the closed position.

The DE 20 2006 014 087 U1 describes a discharge device for dispensing and mixing of multicomponent masses with a cartridge with two storage containers. A mixer for mixing the component masses can be connected to the cartridge by means of a bayonet closure.

The dispensing devices known from the prior art do not easily ensure that the dispensing tube can be arranged cleanly on the syringe part during placement without damaging the mixing coil. There is also the risk that the dispensing tube is not placed cleanly on the syringe part, so that when squeezing the syringes, the components can emerge laterally at the connection points between the syringe parts and the dispensing tube.

The object of the present invention is to provide a simply constructed discharge device for mixing and dispensing multicomponent masses, which prevents unintentional dispensing or mixing of the individual components and enables a reciprocating movement of a closure element between an open and a closed position of the dispensing device.

This object is achieved by a discharge device with the features of claim 1. Advantageous embodiments and expedient developments of the invention are specified in the subclaims.

The discharge device according to the invention for mixing and dispensing multicomponent masses contains a multicomponent cartridge or multicomponent syringe with a plurality of, in particular, cylindrical chambers, with double-cartridges or double-syringes having two chambers being particularly preferred. As a result, the term multicomponent cartridge is used as a representative of all embodiments. The chambers, i. the interior of the cartridges may be formed circular-cylindrical or have an elliptical or polygonal cross-section. The chambers contain at least one fluid component of a filling compound in the filled state. This filling material is separated from the environment usually by a freely displaceable in the chamber cartridge piston. The cartridge piston contains sealing elements, which seal the chamber contents fluid-tight from the environment. The components in the chambers of the multicomponent cartridge are discharged by means of an ejector ram, which cooperates with the corresponding cartridge piston such that the cartridge pistons can be displaced in the chamber.

The multicomponent cartridges contain, in addition to the cylindrical chambers, an integral part serving as an outlet part. It concerns the Auslassteil example, a total of tubular projections of the individual chambers and / or a cylindrical connection part. The outlet part can be engaged by the rotary cap and, on the mixer side, has an outlet opening for each component, ie the individual components are kept separate from one another up to the mixer-side end of the outlet part, so that premature mixing of the components is prevented. The dispensing openings can thus be kept fluid-tightly closed by the rotary cap, so that the components in the chambers of the multi-component cartridge can be stored for longer periods and can also be transported in the multi-component cartridge.

The discharge device also has an elongate mixing element integrally formed on the multi-component cartridge and thus fixed, and a mixer housing which can be turned over the mixer element. A fixed mixer element is understood as meaning a mixer element which is integrally connected to the multicomponent cartridge, that is to say a multicomponent cartridge and mixer element form a single component.

Each chamber of the multi-component cartridge has an outlet opening which can be closed by closure elements fixed to the mixer housing, wherein the outer surface of the mixer element and the inner wall of the mixer housing have a cooperating guide element which allows a displacement of the mixer housing on the mixer element only along the longitudinal axis of the mixer element. The mixer housing is connected by a connecting element with the multi-component cartridge axially displaceable. The multi-component cartridge can be transferred from a closing position closing the dispensing openings into a dispensing position which releases the dispensing openings.

The guide element is in particular designed such that the mixer housing and the mixer element in the closing and dispensing position and on the entire path between these two positions are only mutually displaceable in the axial direction. The connecting element is a rotary element, wherein the rotary element, the mixer housing and the multi-component cartridge have a cooperating engagement element, which is designed such that by rotating the rotary element results in an axial relative movement between the mixer housing and multi-component cartridge.

Preferably, the mixer element and the multi-component cartridge is integrally formed, in which case the mixer element and the multicomponent cartridge consist of the same material. In this case, the mixer element forms a molding on the outlet part of the multi-component cartridge, wherein the mixer element is conveniently located between the discharge openings of the cartridges. The mixer element is preferably dimensionally stable and has a rigid shape, at least at room temperature, so that it protrudes rigidly from the multicomponent cartridge. The mixer element is expediently a cylindrical or frustoconical element with an elliptical or polygonal cross section. Preferably, the mixer element is cylindrical and has a rectangular cross-section. This particular embodiment has the advantage that when assembling mixer element and mixer housing a faulty placement of the mixer housing is dispensed on the mixer element. More preferably, the mixer element has two elongate closed mixer walls, wherein the other two mixer longitudinal walls are open.

The mixer element has a longitudinal central axis, which is also referred to below as the longitudinal axis. The longitudinal central axes of the chambers of the multicomponent cartridge are preferably all parallel to one another. Most preferably, the discharge device is constructed such that the longitudinal center axes of the chambers and the longitudinal axis of the mixer element are all parallel to each other. Furthermore, in the axial direction of the discharge device, the direction of the longitudinal axis of the mixer element is always understood.

The discharge device also has a mixer housing which can be turned over via the mixer element. The mixer housing has at the end opposite the outlet part of the multicomponent cartridge a preferably conically tapered outlet region with a discharge opening. At the cartridge-side end, the mixer housing has a closure element for closing at least one of the dispensing openings of the chambers. As closure element, sealing plugs fixed to the mixer housing are preferred. The sealing plugs are designed, in particular, as closure elements formed on the mixer housing. Accordingly, the sealing plug and the mixer housing are preferably integrally formed from the same material.

The multi-component cartridge, the mixer element and the mixer housing are preferably made of the same material. In particular plastic is suitable as the material, wherein all plastics which can be processed into dimensionally stable, substantially rigid structures can be used. Especially preferred are polypropylene (PP), polyoxymethylene (POM) and acrylonitrile-butadiene-styrene copolymer (ABS). In a first embodiment of the discharge device according to the invention, the interior of the mixer housing comprising the mixer element has a shape which fits precisely to the mixer element, wherein a minimal clearance is provided to ensure axial displacement of the mixer housing on the mixer element. In this case, the form-fitting-like design of the inner wall of the mixer housing and the outer wall of the mixer element form the required axial guide element to ensure that the displacement of the mixer housing on the mixer element is possible only along the longitudinal axis of the mixer element.

In a further embodiment of the inventive discharge device, the guide element for axial displacement of the mixer housing on the mixer element are not formed by a positive connection of the mixer element with the mixer housing, but by at least one extending in the axial direction tongue and groove arrangement. In this case, only a single axially extending tongue and groove arrangement can be used, or else a plurality of separately arranged, axially extending tongue and groove arrangements. The groove can each be in the mixer element, in which case a spring-shaped molding on the mixer housing is necessary, or the groove can be attached to the inside of the mixer housing, in which case a spring-shaped Anformung on the outer wall of the mixer element is required.

The mixer housing is connected by a connecting element with the multi-component cartridge axially displaceable. It is essential that the mixer housing with the molded sealing plug for the discharge openings of the chambers is movable from a closing position closing the discharge openings into a dispensing position which releases them. Next essential to the invention is that the axial guide element are formed such that the mixer housing and the mixer element in the closing and dispensing position and on the the entire path between these two positions are only mutually displaceable in the axial direction.

The rotary element connecting the multicomponent cartridge to the mixer housing is, in particular, a rotary cap which is rotatable either relative to the multicomponent cartridge or the mixer housing, but is fixed in the axial direction in a stationary manner. The rotary cap is a cup-shaped element with a lid with a centrally located recess for the passage of the mixer housing and a peripheral wall. In particular, the lid has a substantially rotationally symmetrical shape. The circumferential wall has, in particular, an exposed edge area.

In an alternative embodiment, the rotary member may be a screw nut and the mixer housing or multi-component cartridge may have a coil cooperating therewith.

The fastening of the rotary member, so in particular the rotary cap on the multi-component cartridge or on the mixer housing is done for example by a snap-lock connection or by a bayonet connection.

A snap-lock connection is preferably formed in that the rotary cap has an at least partially encircling annular bead-shaped bulge on a free edge region and on the outer surface of the multi-component cartridge or on the outer surface of the mixer housing a cooperating with the bead-shaped bulge, at least partially encircling annular Anformung or groove is formed.

The outer surface is in particular the outer surface of the outlet part.

The free edge region of the rotary cap is formed to slipping over the bead-shaped bulge on the annular Anformung or groove on the outlet part of the multi-component cartridge or the mixer housing elastically deformable.

The rotary cap can be fixed in the closed position and / or in the dispensing position of the multicomponent cartridge, in particular by means of a bayonet closure.

According to an advantageous embodiment, the rotary cap has a rotary cap slot extending helically in the longitudinal direction of the mixer element, and the mixer housing has a guide element cooperating with the rotary cap slot, in particular a housing button. According to an advantageous variant, a further slot element adjoins at least at one end of the rotary cap slot in a normal plane to the longitudinal axis of the rotary cap, which together with the guide element forms a bayonet securing device.

According to a further advantageous embodiment, the mixer housing has on its outer surface a helical in the longitudinal direction of the mixer element extending housing groove and the rotary cap cooperating with the housing groove guide element, in particular a rotary cap knob on.

According to a further advantageous variant, a further groove element adjoins at least one end of the housing groove in a normal plane to the longitudinal axis of the mixer housing, which groove forms a bayonet lock together with the guide element.

The Drehkappenschlitz or the housing groove are advantageously designed such that the rotation of the rotary cap about the longitudinal axis of the mixer element from the closed position to the dispensing position 270 ° and less, in particular 90 ° to 180 °, based on a full circle of 360 °.

The axial relative movement between mixer housing and multi-component cartridge from the closed position to the dispensing position is preferably 0.5 mm to 4 mm, in particular 1 mm to 3 mm.

The outer surface of the rotary cap may have axially extending rotary vanes or circumferentially distributed, axially extending corrugations for improved manual torque transmission.

In particular, the mixer element and the mixer housing have cooperating coding means, so that the mixer housing can be placed on the mixer element only in a predetermined position. The multicomponent cartridge has at the mixer-side end an outlet part, which is designed to be engaged by the mixer housing and the outer surface of the outlet part and / or the inner wall of the mixer housing have sealing means in order to eject the components to be mixed from the chambers a leaking leakage of the components between the Mixer housing and the multi-component cartridge to prevent.

In the multi-component cartridge according to the invention, according to an advantageous embodiment, the mixer element can be designed as a guide element for the axial displacement of the mixer housing in order to enable the mixer housing to be placed and moved on the outlet part of the multicomponent cartridge. To fix the To ensure mixer housing in an open position and / or in a closed position of the mixer housing, in an advantageous embodiment of the invention at the outlet part and / or on the outer wall of the chambers and / or the mixer housing additional engagement elements, in particular locking lugs and corresponding locking grooves may be provided. As a result, on the one hand, the components can be output trouble-free, but on the other hand, the chambers are sealingly closed, whereby dehydration or premature curing of the components present in the chambers can be prevented. Particularly advantageous dispensing openings of the chambers can be sealingly closed by arranged on the mixer housing corresponding sealing elements. In addition, the detents and grooves help the user ensure that the mixer housing is in the correct position.

Fig. 1

eine dreidimensionale Ansicht einer Mehrkomponentenkartusche mit aufgesetztem Mischergehäuse und Ausdrückstössel;

Fig. 2

eine Ansicht eines Ausschnitts der Mehrkomponentenkartusche aus Fig. 1;

Fig. 3

einen Querschnitt durch das austragseitige Ende der Mehrkomponentenkartusche aus Fig. 1;

Fig. 4

eine Detailansicht der Verbindung der Drehkappe mit dem Mischergehäuse und dem Ausgabehals gemäss Fig. 4;

Fig. 5

eine dreidimensionale Ansicht einer Variante des austragseitigen Endes der Mehrkomponentenkartusche sowie der Drehkappe und des Mischergehäuses;

Fig. 6

eine schematische Ansicht des aufgesetzten Mischergehäuses ohne Drehkappe;

Fig. 7

die Ansicht aus Fig. 6 mit aufgesetzter Drehkappe in geschlossener Stellung;

Fig. 8

ein zweites Ausführungsbeispiel einer Austragsvorrichtung;

Fig. 9

ein Detail des Mischergehäuses und der Drehkappe für das zweite Ausführungsbeispiel;

Fig. 10

ein Detail der Drehkappe des zweiten Ausführungsbeispiels;

Fig. 11

einen Schnitt durch das Mischergehäuse gemäss des zweiten Ausführungsbeispiels;

Fig. 12

eine Variante des zweiten Ausführungsbeispiels für ein Mischerelement mit einem quadratischen Querschnitt;

Fig. 13

ein drittes Ausführungsbeispiel einer Austragsvorrichtung;

Fig. 14

ein Detail des Mischergehäuses und der Drehkappe für das dritte Ausführungsbeispiel;

Fig. 15

ein Detail der Drehkappe des dritten Ausführungsbeispiels;

Fig. 16

einen Schnitt durch das Mischergehäuse gemäss des vierten Ausführungsbeispiels;

Fig. 17

ein viertes Ausführungsbeispiel einer Austragsvorrichtung;

Fig. 18

ein Detail des Mischergehäuses und der Drehkappe für das vierte Ausführungsbeispiel;

Fig. 19

einen Schnitt durch das Mischergehäuse gemäss des vierten Ausführungsbeispiels;

Fig. 20

ein Detail der Fig. 19.

Other features and advantages of the invention will become apparent from the following description of a preferred embodiment with reference to the drawings. Show it

Fig . 1

a three-dimensional view of a multi-component cartridge with mounted mixer housing and Ausdrückstössel;

Fig. 2

a view of a section of the multi-component cartridge Fig. 1 ;

Fig. 3

a cross section through the discharge end of the multi-component cartridge Fig. 1 ;

Fig. 4

a detailed view of the connection of the rotary cap with the mixer housing and the output neck according Fig. 4 ;

Fig. 5

a three-dimensional view of a variant of the discharge end of the multi-component cartridge and the rotary cap and the mixer housing;

Fig. 6

a schematic view of the mounted mixer housing without turning cap;

Fig. 7

the view Fig. 6 with attached rotary cap in closed position;

Fig. 8

a second embodiment of a discharge device;

Fig. 9

a detail of the mixer housing and the rotary cap for the second embodiment;

Fig. 10

a detail of the rotary cap of the second embodiment;

Fig. 11

a section through the mixer housing according to the second embodiment;

Fig. 12

a variant of the second embodiment of a mixer element with a square cross-section;

Fig. 13

a third embodiment of a discharge device;

Fig. 14

a detail of the mixer housing and the rotary cap for the third embodiment;

Fig. 15

a detail of the rotary cap of the third embodiment;

Fig. 16

a section through the mixer housing according to the fourth embodiment;

Fig. 17

a fourth embodiment of a discharge device;

Fig. 18

a detail of the mixer housing and the rotary cap for the fourth embodiment;

Fig. 19

a section through the mixer housing according to the fourth embodiment;

Fig. 20

a detail of Fig. 19 ,

Fig. 1 shows a discharge device according to the invention for mixing and dispensing of multi-component masses according to a preferred embodiment. In the Fig. 1 formed as a double syringe multi-component cartridge 1 has a container which has two substantially cylindrical and firmly interconnected chambers 2, 3 for receiving different components. The components here are the two components of a two-component adhesive, which may only be mixed together shortly before application to the objects to be bonded. However, other components can also be stored in the chambers, for example impression materials for dental applications. In principle, the present multicomponent cartridge is particularly suitable for all applications in which small amounts of the components are to be applied once.

The multi-component cartridge has an entrance end 40 and an exit end 50. The inlet end 40 contains inlet openings 41, 42, through which the chambers 2, 3 filled with the corresponding components can be. The outlet end 50 includes an outlet part 5, which in Fig. 3 is shown. In order to be able to express the components from the chambers 2, 3, the multi-component cartridge has a squeeze-out ram 4, which of Fig. 1 down to the entry end 40 of the multi-component cartridge can be pushed out. The push-out ram has for each of the chambers 2, 3 corresponding piston elements, which are displaceable along the inner wall of the chambers. During a movement of these pistons in the direction of the outlet end 50, the components located in the chambers are pushed in the direction of the outlet part 5. The outlet part 5 includes discharge openings 9, 29, which in turn Fig. 3 are visible.

At the outlet end 50 of the chambers 2, 3, a mixer housing 10 is arranged, which is designed as a discharge tube. The mixer housing has according to Fig. 1 a substantially square cross section and a discharge opening 12 for discharging the components mixed on the way through the mixer housing. The mixer housing contains a mixing element 30, not shown here, which is described below in connection with FIG Fig. 3 showing the mixer element 30 will be described in more detail. The mixer element is integrally connected to the outlet part 5, that is, the mixer element is manufactured in a single step as part of the multi-component cartridge.

The mixer housing is slipped over mixer element and by an appropriately trained rotary element in a in Fig. 1 kept closed position shown. The rotary element of Fig. 1 is designed as a rotary cap 20. The rotary cap is rotatable relative to the multi-component cartridge 1 or to the mixer housing 10.

Fig. 2 shows a section of a view of the multi-component cartridge 1, which the outlet end 50 and a part of the mixer housing 10th shows. The exit end 50 is hidden from that of the rotary cap 20. The rotary cap 20 is a cup-shaped element which has a bottom with an opening through which the mixer housing 10 can be pushed. At the bottom joins a jacket element, which opens into a free edge region 21. At least one rotary vane 22 is mounted on the jacket element and / or the free edge region 21. By means of the rotary blade 22, it is made easier for the user to make the rotary movement of the rotary cap, or to hold the rotary cap when the mixer housing 10 is to be set in a rotational movement.

The rotary cap 20 holds the mixer housing 10, wherein the mixer housing 10 has an inlet end which is formed as a collar 11. Of the collar 11, which is largely hidden by the rotary cap 20, only a small part is visible, which is released by the pivot cap slot 24. On the outer lateral surface of the collar 11, a housing button 14 is arranged. The housing button 14 is displaceable in the rotary cap slot 24 by a rotational movement of the mixer housing 10 or the rotary cap 20 along the predetermined by the rotary cap slot 24 line. Under housing button is an arbitrarily shaped projection to understand, which has a shape suitable for the rotary cap slot, so that a relative movement of the rotary cap slot and housing button is not hindered. In particular, the housing button has a width that is smaller than the width of the pivot cap slot.

How out Fig. 3 It can be seen in which the outlet end 50 of the multi-component cartridge 1 and the mixer housing 10 is shown in section, a mixing element 30 provided with numerous deflecting elements is provided at an outlet part 5 of the multi-component cartridge 1. The mixer element 30 forms a single component with the multicomponent cartridge 1. The elongate mixer element 30 has a sleeve over the mixer element 30 can be inverted Mixer housing 10 on. The mixer housing 10 and the mixer element 30 are fixed by the rotary cap 20.

In the outlet part 5, the chambers 2, 3 are channel-shaped to discharge openings 9, 29 extended. Through the discharge openings 9, 29, the components from the chambers 2, 3 can be dispensed into the mixing chamber formed by the attached mixer housing 10, when the mixer housing in the in Fig. 6 shown opened position.

Each of the discharge openings 9, 29 can be closed by closure elements 16, 26 fixed to the mixer housing 10. The closure elements may in particular be designed as sealing plugs. The outer surface of the mixer element 30 and the inner wall of the mixer housing 10 have cooperating guide elements, which allow a displacement of the mixer housing 10 on the mixer element 30 only along the longitudinal axis 32 of the mixer element 30. The mixer housing 10 is axially displaceably connected to the multi-component cartridge 1 by a connecting element, wherein the multi-component cartridge 1 can be transferred from a closing position closing the dispensing openings 9, 29 into a dispensing position releasing the same. The guide elements are designed such that the mixer housing 10 and the mixer element 30 are displaceable against each other in the closing and dispensing position and on the entire path between these two positions only in the axial direction.

The rotary element 20, the mixer housing 10 and the multicomponent cartridge 1 have a cooperating engagement element 14, 24, which is designed such that by rotating the rotary member 20, an axial relative movement between the mixer housing 10 and Multi-component cartridge 1 results. The engagement element is designed in particular as a housing button 14 or as a cap bead.

The rotary cap 20 is attached to the outlet part 5 or the outer wall of the chambers 2, 3 by means of a snap connection 15. The snap connection 15 is located in the region of the free edge region 21 of the rotary cap. The free edge region 21 includes on its inside a groove into which an associated projection of the outlet part 5 or the outer wall of the chambers 2, 3 engages. Preferably, the free edge region is elastic, so that by means of a small deflection of the same under application of an axial compressive force a slipping over the outlet part or the outer wall takes place.

In Fig. 4 is a part of the Fig. 3 which shows the function of the engagement elements 18, 19 and the snap connection 15 in detail. The same parts carry the same reference numerals as in Fig. 3 , This shows Fig. 3 a part of the Ausgabehalses 8, which opens into the partially shown discharge opening 9. The discharge opening 9 is closed in the present illustration by a sealing plug 16, which is part of the mixer housing 10. The mixer housing 10 has a mixer housing collar 11, which is slipped over the dispensing neck. Via a first sealing projection 6 and a second sealing projection 7, the mixer housing 10 is fluid-tightly connected to the dispensing neck 8, so that in the closed state, the component located in the chamber 2 can not escape from the chamber.

The mixer housing 10 can be displaced in the axial direction, ie substantially in the direction of the longitudinal axis 32 of the mixer element 30, for which purpose the rotary cap 20 is provided. The rotary cap 20 has at a free edge region 21 at least partially encircling, annular bead-shaped bulge 18. On the outer surface 17 of the multi-component cartridge 1 is a corresponding thereto, at least partially encircling annular Anformung 19 or groove formed, and the free edge portion 21 of the rotary cap 20 for slipping over the bulbous bulge 18 on the annular Anformung 19 or groove of the multi-component cartridge 1 or the mixer housing 10 is elastically deformable.

By providing a snap connection to the rotary cap 20, it is also prevented that the mixer housing 10 from the multi-component cartridge 1 accidentally, z. B. is withdrawn when opening. The multi-component cartridge, that is, in particular the outer wall of the chambers 2, 3 or its outlet part 5 have at the discharge end a locking projection 19, which upon placement of the mixer housing 10 and the rotary cap 20 due to the flexibly formed engaging element, which here as a bulge-shaped bulge 18 of free edge region 21 rotary cap 20 is shown, can be pressed to the outside. After placing the mixer housing 10, the bead-shaped bulge 18 is engaged with the locking projection 19 and thus prevents its removal.

In order to seal the discharge openings 9, 29 sealingly in the closed position of the mixer housing 10, the inside of the mixer housing collar 11 has two substantially annular closure elements 16, 26 which taper inwards towards the discharge side and have a frustoconical cross section. Due to their special shape, the closure elements 16, 26 make it possible to close the dispensing openings 9, 29, whereby a certain force must be overcome for pulling out the closure elements 16, 26 from the dispensing openings 9, 29, which ensures the tightness in the closed state.

In the embodiment of the invention shown in the drawings, the guidance of the mixer housing 10 is ensured on the mixer element 30 by their matched square inner or outer contour, the cross-section of both the mixer element 30 and the mixer housing 10 is thus substantially square. So that the components are pressed as completely as possible by the mixer element 30, the distance between the inner contour of the mixer housing 10 and the outer contour of the mixer element 30 is as small as possible, wherein the displacement of the mixer housing 10 must still be possible. In addition, erroneous placement of the mixer housing 10 on the mixer element 30 can be prevented by means of a coding means that is easily recognizable from the outside, such as, for example, an elliptical shape of the mixer housing collar 11 and the dispensing neck 8 of the multicomponent cartridge 1. Since the mixer element 30 consists of a dimensionally stable material, secure guidance of the mixer housing 10 in the axial longitudinal direction of the multicomponent cartridge is ensured.

In an alternative embodiment of the invention, the outer contour of the mixer element 30 and the inner contour of the mixer housing 10 are rectangular, thus have a substantially rectangular cross-section, so that already hereby a rotation-safe guidance of the mixer housing 10 is ensured. In addition, it is advantageous in such a design that the mixer housing 10 can be placed on the mixer element 30 exclusively in the position necessary for the secure sealing and engagement of the closure elements 16, 26 in the dispensing openings 9, 29. In this case, the mixer housing collar 11 of the mixer housing 10 and the output neck 8 of the multi-component cartridge 1 may also have other shapes with a different cross-section, for example circular. Nevertheless, the special shape of the mixer element 30 ensures that the dispensing openings 9, 29 and the closure elements 16, 26 always intermesh.

Fig. 5 shows a variant which shows another mixer element 30, a modified rotary cap 20 and an alternative embodiment of the closure elements 16, 26. Like-acting parts bear the same reference numerals as in the preceding Fig. 1 to 4 , The guide elements for the axial displacement of the mixer housing 10 on the mixer element 30 are formed by a formschlussähnliche formation of the inner wall 13 of the mixer housing 10 and the outer wall 31 of the mixer element 30, wherein at least the outer wall 31 of the mixer element 30 and the mixer element 30 enclosing inner wall 13 of the mixer housing 10 each have a polygonal, in particular rectangular or elliptical cross-section.

In the in Fig. 5 illustrated variant, the discharge device is shown in the open state, so that the filling material, which is a mixture of the located in the chambers 2, 3 components, can be discharged through the discharge opening 12 of the mixer housing 10. By rotation of the rotary cap 20 there is an axial displacement of the mixer housing 10 relative to the cartridge 1 or its mixer element 30. The housing button 14 is mounted in this variant not on the mixer housing collar 11, but on a projection 37, which in a corresponding Drehkappenschlitz 24 intervenes. The extension 37 extends from a closure element 16, 26 carrying connector 38 of the mixer housing. On the connecting piece 38, the closure elements 16, 26 are arranged on the side facing the cartridge 1. The closure elements 16, 26 have a cross-sectional area which is greater in the closed state than in the opened state. In the open state, the corresponding component can flow past the corresponding closure element. According to Fig. 5 the closure elements have a spherical shape.

Fig. 6 shows a schematic view of the mounted on the multi-component cartridge 1 mixer housing 10 without Twist cap. In this illustration, the engagement element is visible, which is designed as a housing button 14. A plurality of housing buttons may be mounted on the outer surface of the mixer housing collar 11. In Fig. 5 two housing buttons 14 are shown, which are arranged opposite to each other. Furthermore, the projection 37 is shown as a cylindrical annular element which extends from the connecting piece 38 in the direction of the mixer housing 10.

Fig. 7 shows the view Fig. 6 with attached rotary cap in closed position. In the closed position, the in Fig. 5 shown closure elements 16, 26 in the corresponding output openings 9, 29 a. The housing button 14 is then in the position in which it is the multi-component cartridge 1 closest, so in the illustration of Fig. 7 at the lower end of the pivot cap slot 24.

The rotary cap has a corrugation 23 on its outer lateral surface. Instead of the same could also rotary vane according to the embodiment according to Fig. 1 to Fig. 4 be provided.

8 to 11 show a variant according to which the guide elements for the axial displacement of the mixer housing 10 are formed on the mixer element 30 by at least one extending in the axial direction tongue and groove arrangement.

Fig. 8 shows a second embodiment of a discharge device, for which in turn like-acting parts are to be designated the same. In the following, only the differences to the first embodiment will be discussed, otherwise referred to the first embodiment.

Fig. 9 shows a detail of the mixer housing and the rotary cap for the second embodiment. The mixer housing 10 has the shape of an im substantially cylindrical tube whose cross-section is substantially circular or elliptical. The mixer housing 10 has a guide element 33, along which it is displaceable relative to the mixer element 30 in the direction of the common longitudinal axis 32.

Fig. 10 shows a detail of the rotary cap 20 of the second embodiment. The rotary cap 20 is configured with a rotary wing 22 and is as in Fig. 1 to 4 show a cup-shaped element, which has a bottom 60, a jacket element 61 and a free edge region 21. The jacket member 61 includes as in Fig. 2 a pivot cap slot 24, however, unlike the first embodiment, the pivot cap slot includes an extension formed as a slot member 64. This slot member 64 forms with the housing button a bayonet protection. The slot member 64 extends over a portion of the circumference of the shell member 61 and is disposed in a normal plane to the longitudinal axis of the pivot cap 20.

Fig. 11 is a section through the mixer housing according to the second embodiment. The mixer element 30 is received in a groove 34 of the guide element 33 of the mixer housing 10. It is also possible to provide a plurality of such grooves 34; in particular, a first groove 34 and a second groove 35 can be provided, which are arranged mirror-symmetrically with respect to one another. The plane of symmetry according to this embodiment runs along the longitudinal axis 32 of the mixer element 30 and is aligned normal to the center wall 36 of the mixer element.

Fig. 12 shows a variant of the second embodiment of a mixer element with a square cross-section. In this variant too, the rotary cap slot 24 has a slot element 64 which forms a bayonet securing device with the housing button.

According to all embodiments, the rotary member 20 is rotatable, but fixed in the axial direction fixed to the multi-component cartridge 1, wherein the rotary member 20 is fixed by means of a snap-lock connection 15 on the multi-component cartridge 1 or on the mixer housing 10.

Fig. 13 shows a third embodiment of a discharge device, according to which the rotary cap 20 is fixed with a bayonet securing to the multi-component cartridge 1, wherein the bayonet protection differs from those of the preceding embodiments. At at least one end of the rotary cap slot 24 in a normal plane to the longitudinal axis of the rotary cap 20 joins another slot member which forms a bayonet lock together with the guide element.

Fig. 14 shows a part of the mixer housing 10 and the rotary cap 20 for the third embodiment. The bayonet lock is in Fig. 14 shown in detail. The rotary cap 20 has a Drehkappenschlitz 24 and another slot member 70 which is associated with the bayonet protection. Furthermore, the rotary cap on a flange 71, which also contains a part of the bayonet protection.

Fig. 15 shows a section through the rotary cap of the third embodiment and Fig. 16 a detail of the flange 70 with the bayonet protection. According to the embodiment according to Fig. 15 the mixer element 30 is formed integrally with the cartridge 1. The cartridge 1 contains the two chambers 2, 3, which open into outlet part 5, each containing an outlet channel which leads to the corresponding outlet opening 9, 29 and forms a channel through which the corresponding component flows whose cross-sectional area is generally smaller than the cross-sectional area the corresponding chamber.

The mixer housing 10 is slipped over the mixer element 30 and placed on the outlet part of the cartridge such that the sealing plugs 16, 26 close the corresponding outlet openings 9, 29. On the outer wall of the output neck 8 of the outlet part 5 are as in Fig. 4 a first seal protrusion 6 and a second seal protrusion 7 arranged. In this position, the chambers 2, 3 are sealed fluid-tight, so that an exit of the components from the discharge openings 9, 29 can not be done.

The rotary cap 20 is passed over the mixer housing 10 and the mixer housing collar 11 until it rests on the flange 71. The rotary cap has on its outer surface 61, a slot member 70 for each housing button 14, so that the rotary cap 20 can be slipped over the mixer housing collar. The rotary cap is placed in a predetermined position relative to the cartridge 1 on the flange 71, said predetermined position is determined by the slot member 70. In Fig. 16 which is a detail of Fig. 15 shows, the slot member is shown in the position in which the rotary cap can be guided via the housing button 14. In the lateral surface 61, an extension 72 is provided, which allows the rotary cap on the housing button 14 along the inner wall of the extension 72 can be passed over.

After a variant, in Fig. 15 is shown on the right side, the lateral surface 61 contains instead of an extension a recess 73. According to this variant, no change in the inner diameter of the lateral surface of the rotary cap, as in the left side shown variant of the extension 72, which incidentally also in Fig. 14 is visible.

By a small rotation, the rotary cap is rotated in the direction of the pivot cap slot 24 so that the housing button 14 can be displaced along the path defined by the pivot cap slot 24. The direction of rotation is in the in Fig. 5 shown left-side embodiment and in Fig. 14 predetermined by a stop 74. Once the pivot cap is rotated relative to the flange 71 such that the housing button 14 is received in the path of the pivot cap slot, a rotating pivot cap flange 75 engages an engagement member 76 of the flange 71 such that the pivot cap on the flange 71 can be kept captive. By further rotation of the rotary cap of the housing button 14 and thus the mixer housing 10 is moved away from the cartridge. The discharge openings 9, 29 are opened when the housing button 14 is in the highest position (see Fig. 14 ) is located in the pivot cap slot 24. In this position, the components can enter the mixer element 30 through the opened discharge openings 9, 29 and the discharge of the components from the chambers of the cartridge can take place.

Fig. 17 shows a fourth embodiment of a discharge device, according to which the rotary cap has a pivot cap slot, which allows two different open positions.

Fig. 18 shows a detail of the mixer housing and the rotary cap for the fourth embodiment. The rotary cap has, following the lateral surface 61, a further lateral surface 62, which has a larger inner diameter than the lateral surface 61. The lateral surface 61 is connected to the lateral surface 62 via a shoulder 63. The lateral surface 62 includes a pivot cap slot 84 along which a button member 85 is slidable along a path defined by the pivot cap slot 84.

During assembly, as in the previous embodiments, the mixer housing 10 is guided over the mixer element 30 and placed on the output neck 8 of the cartridge. Thereafter, the rotary cap 20 is moved over the mixer housing 10 in the direction of the outlet end 50 of the cartridge 1. The rotary cap contains in the lateral surface 62 a bulge 86 through which the button element 85 can be passed. The rotating cap is in the representation according to Fig. 18 shifted down until the button member 85 is present at the upper end of the pivot cap slot 84. In this state, the discharge openings of the cartridge 1 are closed.

In order to discharge the components from the cartridge, the rotary cap is now turned either to the left or to the right. The button member 85 slides along the path defined by the pivot cap slot 84 so that the mixer housing 10 is displaced so as to release the discharge openings.

Fig. 19 shows a section through the rotary cap 20 according to the fourth embodiment along the rotary blades 22 in the in Fig. 18 drawn position in which the discharge openings 9, 29 are closed by the closure elements 16, 26. The mixer housing 10 also has a mixer housing collar 11, but unlike the previous embodiments, a rotating mixer housing flange 88. The mixer housing flange 88 engages a circumferential Drehkappennut 86, so that the rotary cap relative to the mixer housing 10 rotatable, but not relative to the mixer housing 10th axially displaceable, which is especially in Fig. 20 which is a detail of the mixer housing and the rotary cap for the embodiment according to Fig. 19 shows.

The button member 85 is attached to the wall of the cartridge 1.

According to another embodiment, not shown, the rotary member 20 has a helically extending in the longitudinal direction of the mixer element 30 Drehkappenschlitz 24 and the mixer housing 10 cooperating with the Drehkappenschlitz 24 guide element.

The mixer housing 10 may have on its outer surface 25 a helical in the longitudinal direction of the mixer element 30 extending housing groove and the rotary cap 20 cooperating with the housing groove guide member.

The pivot cap slot 24 or the housing groove are in particular designed such that the rotation of the rotary cap 20 about the longitudinal axis of the mixer element 30 from the closed position to the dispensing position 270 ° and less, in particular 90 ° to 180 °, based on a full circle of 360 °.

The outer surface 51 of the outlet part 5 and / or the inner wall 13 of the mixer housing 10 may have a sealing means 6, 7, during the expression of the components to be mixed from the chambers 2, 3 a leaking leakage of the components between the mixer housing 10 and the multi-component cartridge. 1 to prevent.

The mixer housing according to each of the preceding embodiments may be transparent or translucent. This allows a visual check that gives mixer satisfactory results, especially when blending differently colored components. The mixer housing can also be opaque, especially if polypropylene or polystyrene are used as materials.

Claims (15)

1. A dispensing apparatus for the mixing and dispensing of multi-component masses including a multi-component cartridge (1) or a multi-component syringe having a plurality of chambers (2, 3), a mixer element (30) having a longitudinal axis and a mixer housing (10) which can be placed over the mixer element (30), wherein each chamber (2, 3) has a dispensing opening (9, 29) closable by means of closure elements (16), wherein an outer surface of the mixer element (30) and an inner wall of the mixer housing (10) have a cooperating guide element which only allows a displacement of the mixer housing (10) at the mixer element (30) along the longitudinal axis of the mixer element (30); and the mixer housing (10) is axially displaceably connected to the multi-component cartridge (1) by a connection element, wherein the multi-component cartridge (1) can be transferred from a closed position locking the dispensing openings (9, 29) into a dispensing position freeing these,
   characterized in that
   the mixer element (30) is made as one piece with the multi-component cartridge (1), the closure elements (16) being formed at the mixer housing (10) and in this way it being ensured that the guide element is designed such that the mixer housing (10) and the mixer element (30) are only displaceable against one another in an axial direction in the closed position and the dispensing position, as well as on the overall path between these two positions and the connection element is a rotary element (20), wherein the rotary element (20), the mixer housing (10) and the multi-component cartridge (1) have a cooperating interaction element (14, 24) which is designed such that through a rotation of the rotary element (20) an axial relative movement results between the mixer housing (10) and the multi-component cartridge (1).
2. A dispensing apparatus in accordance with claim 1, wherein the guide element for the axial displacement of the mixer housing (10) at the mixer element (30) is formed by a form-fitting like formation of the inner wall (13) of the mixer housing (10) and the outer wall (31) of the mixer element (30), wherein, in particular at least the outer wall (31) of the mixer element (30) and the inner wall (13) of the mixer housing (10) surrounding the mixer element (30) each have a polygonal, in particular rectangular or elliptical cross-section.
3. A dispensing apparatus in accordance with one of the preceding claims, wherein the guide element for the axial displacement of the mixer housing (10) at the mixer element (30) is formed by at least one tongue and groove arrangement extending in a axial direction.
4. A dispensing apparatus in accordance with any one of the preceding claims, wherein the rotary element (20) is attached rotatably to the multi-component cartridge (1), but is attached to the multi-component cartridge (1) rotationally fixedly in the axial direction.
5. A dispensing apparatus in accordance with claim 4, wherein the rotary element (20) is attached at the multi-component cartridge (1) or at the mixer housing (10) by means of a snap and lock connection (15).
6. A dispensing apparatus in accordance with claim 4, wherein the rotary element (20) is rotatably and axially fixedly attached at the multi-component cartridge (1) or at the mixer housing (10) by means of a bayonet connection.
7. A dispensing apparatus in accordance with any one of the claims 4 to 6, wherein the rotary element is a rotary cap (20) which has a cover with a centrally arranged recess for guiding through the mixer housing (10) and a surrounding wall.
8. A dispensing apparatus in accordance with claim 7, wherein the rotary cap (20) has an at least partially surrounding ring-shaped bead-like indentation (18) at a free boundary region (21) and an at least partially surrounding ring-shaped molding (19) or groove corresponding therewith at the outer surface (17, 25) of the multi-component cartridge (1) or the mixer housing (10) and the free boundary region (21) of the rotary cap (20) is elastically deformable for the placing over of the bulge-shaped indentation (18) over the ring-shaped molding (19) or groove of the multi-component cartridge (1) or the mixer housing (10).
9. A dispensing apparatus in accordance with any one of the preceding claims, wherein the rotary element (20) can be fixed in the closed position and/or in the dispensing position of the multi-component cartridge (1).
10. A dispensing apparatus in accordance with any one of the preceding claims, wherein the rotary element (20) has a rotary cap slot (24) running helically in the longitudinal direction of the mixer element (30) and the mixer housing (10) has a guide element cooperating with the rotary cap slot (24).
11. A dispensing apparatus in accordance with claim 10, wherein a further slot element adjoins at at least one end of the rotary cap slot (24) in a normal plane with regard to the longitudinal axis of the rotary cap (20) which forms a bayonet security together with the guide element.
12. A dispensing apparatus in accordance with any one of the preceding claims, wherein the mixer housing (10) has a housing groove running helically at its outer surface (25) in the longitudinal direction of the mixer element (30) and the rotary cap (20) has a guide element cooperating with the housing groove.
13. A dispensing apparatus in accordance with claim 12, wherein a further groove element adjoins at at least one end of the housing groove in a normal plane with regard to the longitudinal axis of the mixer housing (10), said groove element forming a bayonet security together with the guide element.
14. A dispensing apparatus in accordance with any one of the claims 10 to 13, wherein the rotary cap slot (24) or the housing groove are formed such that the rotation of the rotary cap (20) about the longitudinal axis of the mixer element (30) from the closed position to the dispensing position amounts to 270° and less, in particular 90° to 180° with regard to a full circle of 360°.
15. A dispensing apparatus in accordance with any one of the preceding claims, wherein the multi-component cartridge (1) has an outlet part (5) at the mixer side end which outlet part is overlappingly formed by the mixer housing (10) and the outer surface (51) of the outlet part (5) and/or the inner wall (13) of the mixer housing (10) has/have sealing means (6, 7) in order to prevent a leaking emergence of the component between the mixer housing (10) and the multi-component cartridge (1) during the expulsion of the components to be mixed from the chambers (2, 3).

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