WO2020035228A1 - Apparatus for applying an at least two-component viscous material to workpieces - Google Patents
Apparatus for applying an at least two-component viscous material to workpieces Download PDFInfo
- Publication number
- WO2020035228A1 WO2020035228A1 PCT/EP2019/068584 EP2019068584W WO2020035228A1 WO 2020035228 A1 WO2020035228 A1 WO 2020035228A1 EP 2019068584 W EP2019068584 W EP 2019068584W WO 2020035228 A1 WO2020035228 A1 WO 2020035228A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- static mixer
- actuating element
- coupling
- open
- coupling part
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1036—Means for supplying a selected one of a plurality of liquids or other fluent materials, or several in selected proportions, to the applying apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4314—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles
- B01F25/43141—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles composed of consecutive sections of helical formed elements
-
- 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
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0208—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to separate articles
- B05C5/0212—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to separate articles only at particular parts of the articles
- B05C5/0216—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to separate articles only at particular parts of the articles by relative movement of article and outlet according to a predetermined path
-
- 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
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
-
- 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
- B05C17/00506—Means for connecting the outlet element to, or for disconnecting it from, the hand tool or its container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/32—Mixing; Kneading continuous, with mechanical mixing or kneading devices with non-movable mixing or kneading devices
- B29B7/325—Static mixers
Definitions
- the invention relates to a device for applying an at least two-component viscous material to workpieces according to the preamble of claim 1.
- Such devices are used, for example, in the manufacture of motor vehicles in order to apply multicomponent materials, such as, for example, two-component adhesives, to body components.
- the static mixer has a coupling section with which it is detachably fixed to the coupling device of the metering unit, and a mixing tube into which the components are introduced by the metering valves.
- the components are mixed as they are passed through from a material inlet at the first end of the mixing tube to a material outlet at the second end, in particular by being passed through a mixing spiral arranged in the mixing tube.
- the static mixer is a wearing part that over time builds up due to hardening residues of the viscous material and has to be replaced or cleaned from time to time.
- a static mixer is replaced manually by loosening the coupling section from the coupling device and attaching a new static mixer to the dosing unit.
- Known devices have a bayonet connection as coupling means for the connection between the coupling device and the coupling part. Detaching the bayonet connection by hand is perceived as complex, since a fitter must always be available when a static mixer has to be replaced.
- the coupling device of the metering unit has an actuating element which can be moved from a locking position into a release position by means of pressurization by a fluid such as compressed air.
- the movement from the release position into the locking position expediently takes place in that the actuating element is pushed into the locking position by the force of at least one elastic restoring element, so that it is held there by means of the force of the restoring element unless it is pressurized by the fluid
- the coupling device also has a plurality of engagement elements, while the coupling section of the static mixer has a corresponding number of recesses which are open at the edge and into which the engagement elements can engage.
- the engagement elements are held in the open-edged recesses by the actuating element when it is in the locking position, so that the coupling part is fixed to the coupling device.
- the release position of the actuating element released the engagement elements to release the fixation. It is thus possible, by pressurizing the actuating element, to decouple a static mixer that is no longer functional from the metering unit, to place the metering unit on a new static mixer, and to add this with its coupling part to the coupling device of the metering unit by reducing the pressure acting on the actuating element fix.
- the automatic change of the static mixer can be designed particularly advantageously if the device has a receiving device for static mixer.
- a receiving device which can also be referred to as a change station, serves to accommodate structurally identical static mixers, each of which has a mixing tube for mixing the components of the viscous material when passing through from the material inlet at the first end to the material outlet at the second end, and one that is detachable at the coupling device have fixable coupling part.
- the receiving device has a plate, which can also be referred to as a table, which has a plurality of receiving openings which are open at the edge, holding means for holding one of the static mixers being arranged in each receiving opening.
- the dosing unit with the static mixer fixed to it is moved to the receiving device by means of a robot, and the static mixer is then inserted into one of the receiving openings via the open edge and held there by means of the holding means.
- the actuating element is then moved into the release position by pressurizing the fluid, so that the fixing of the coupling part to the coupling device is released.
- the dosing unit is then lifted off the static mixer by means of the robot and placed on another static mixer held in another receiving opening of the receiving device. By reducing the pressurization, the actuating element is moved back into the locking position, so that the coupling part of the further static mixer is fixed to the coupling device.
- the dosing unit with the additional static mixer attached to it is moved out through the open edge by means of the robot moved the receiving opening away from the receiving device and can be used again for the application of viscous material.
- the change of the static mixer can be initiated automatically by means of a control unit if a measured parameter of the device deviates from a predetermined target value by more than a predetermined tolerance value.
- the parameter can be, for example, the pressure in the static mixer, which is measured by means of a pressure sensor and then rises above a tolerable value when the static mixer with hardened material has partially clogged.
- the coupling section engages in the coupling device and that the open-edged recesses are open to an outer lateral surface of the coupling section. This ensures a stable connection between the dosing unit and the static mixer.
- the open-edged recesses are connected to one another to form a circumferential annular groove, the annular groove expediently having a constant cross section over its entire length. This makes it easier to position the dosing unit with respect to the static mixer when it is coupled to the dosing unit.
- the metering unit can then be placed on the static mixer rotated as desired about a longitudinal center axis of the mixing tube if the engagement elements can engage at any point in the annular groove forming the recesses which are open at the edges.
- the actuating element it is possible for the actuating element to be designed in several pieces, with each of the pieces acting on one of the engaging elements in the locking position. A simpler construction is achieved, however, if the sections of the actuating element which each act on one of the engagement elements in the locking position are rigidly connected to one another and can be moved together into the locking position and back again into the release position.
- the coupling device expediently has a housing in which the actuating element is located between the locking position and the release position. is movable, this movement advantageously being linear. It is further preferred that the housing has a pressure space delimited on one side by the actuating element and means for introducing and discharging the fluid into and out of the pressure space.
- the actuating element then acts like a piston which is pressurized by the fluid, preferably compressed air.
- the housing expediently has a bottom wall delimiting the pressure chamber on the side facing away from the actuating element and in which at least one opening is closed by a removable closure element.
- the engagement elements are mounted in the housing. They are expediently designed as balls which are simple to produce and can also be moved without great effort, since they have a smooth surface over which the actuating element can slide and because they can be rotated about any axes of rotation.
- the engaging elements are preferably movable towards one another in the radial direction by acting on the actuating surfaces on the actuating element when it is moved into the locking position. They then narrow the cross section of the coupling device in the region of the open-edged recesses or in the region of the circumferential annular groove. Furthermore, it is preferred that the actuating element has retreat spaces for receiving the engagement elements in the release position. The engagement elements can withdraw into the retreat spaces if they are to be displaced from the open-ended recesses or from the annular groove forming the open-edge recesses in order to remove the fixation of the static mixer on the metering unit.
- the actuating element in each case connects an actuating surface with a retraction space and an angle of more than 180 ° with the respective actuating surface and less than 270 ° enclosing has tapered slopes so that the engagement elements are continuously advanced when the actuating element moves from the release position into the locking position.
- the coupling part is expediently detachably connected to the mixing tube.
- the mixing tube is clogged with material and must either be thrown away or cleaned, the coupling section can be detached from the mixing tube and attached to a new mixing tube and thus used again.
- mixing tubes can be used with the device according to the invention. It is possible that the mixing tube is rigid and made of metal. A mixing helix which is also made of metal is expediently inserted in such a mixing tube. Such mixing tubes are generally cleaned when they are clogged by hardened material by removing the mixing spiral and cleaning the components individually using cleaning fluid. Usually, however, the mixing tube has an inner tube made of plastic which has the material inlet and the material outlet and a support tube made of metal which receives the inner tube at least over most of its length. A mixing helix is then usually arranged in the inner tube, which is also expediently made of plastic.
- the inner tube is removed from the supporting tube and thrown away, while the supporting tube can be used again by inserting a new inner tube.
- the inner surface of the support tube lies against the outer lateral surface of the inner tube and prevents the inner tube from expanding under pressure.
- the support tube defines the location of the material outlet, since, in contrast to the inner tube made of plastic, it is not or only slightly flexible.
- the static mixer advantageously has two centering disks which protrude radially from the mixing tube and are spaced apart in the axial direction.
- the static mixers are then inserted into the change station sets that a first centering disc is arranged above and a second centering disc below the plate.
- the upper centering disc prevents the static mixer from moving downwards when the robot places the dosing unit on the coupling section.
- the lower centering disc prevents the static mixer from being pulled upwards out of the plate when the dosing unit lifts off the coupling section after moving the actuating element into the release position of the robot.
- 1 a, 1 b show an application device for two-component viscous material in a partial representation in section with a static mixer fixed to a dosing unit and with a static mixer detached from the dosing unit;
- FIG. 2a, 2b the static mixer according to FIG. 1 a, 1 b partially disassembled in perspective view and in section and
- Fig. 3 is a receiving device for static mixers.
- the device 10 partially shown in the drawing (FIGS. 1 a, 1 b) is used to apply a two-component adhesive to workpieces. It has a doiser unit 12 and a static mixer 14 which is moved relative to the workpieces by means of a robot (not shown) during the application process.
- the metering unit 12 has a valve block 16, only partially shown in FIGS. 1 a, 1 b, with two metering valves 18, which are designed as needle valves.
- the metering unit 12 has a coupling device 20, which is detachably and firmly connected to the valve block 16 and in which the valve seats 22 are arranged.
- the valve needles 24 extend into the coupling device 20 and open and close the metering valves 18 on the valve seats 22.
- the static mixer 14 has a coupling section 26 which engages in the coupling device 20 (FIG. 1 a) and is detachably fixed thereon.
- the static mixer 14 also has a mixing tube 28 which extends from a material inlet 30 at its first end to a material outlet 32 at its second end.
- the mixing tube is expanded at the material inlet 30 and communicates there with the metering valves 18.
- At the material outlet 32 it is conically narrowed.
- It has an inner tube 34 made of plastic, which has the material inlet 30 and the material outlet 32, in which a mixing spiral 36 is arranged.
- a support tube 38 made of metal, which extends over most of the length of the inner tube 34 and bears against the outer lateral surface 40 thereof.
- the two components base component and hardener
- the two components are each metered into the material inlet 30 by means of one of the metering valves 18 and are first fed separately to the mixing spiral 36 by a partition 42.
- the two components mix in the mixing spiral 36 on their way to the material outlet 32.
- the coupling part 26 is part of an adapter 44 which is detachably connected to the support tube 38 and for this purpose an internal thread 46 for screwing onto an external thread Has support tube 38.
- the coupling part 26 has a circumferential annular groove 50 which has a constant cross section over the entire circumference.
- Metal balls 52 are non-detachably received in the coupling device 20, which represent certain engagement elements for engagement in the annular groove 50 in order to fix the coupling part 26 in the coupling device 20.
- the annular groove 50 thus forms a continuous sequence of open-cut recesses 50 in the outer lateral surface 54 of the coupling part 26.
- the coupling device 20 has an annular actuating element 56 which is located in a housing 58 of the coupling device 20 between a Locking position (Fig. 1 a) and a release position (Fig. 1 b) is linearly displaceable.
- the actuating element 56 has actuating surfaces 60 which act on the balls in the locking position according to FIG. 1 a and move them in the direction of a longitudinal central axis 62 of the static Press the shear 14 into the annular groove 50 and hold it there in order to fix the coupling part 26 to the coupling device 20.
- the actuating element 56 also has a retraction space 64 for each ball, into which the respective ball 50 can retract away from the longitudinal central axis 62 when the actuating element 56 according to FIG. 1b is in the release position.
- the housing 58 has a pressure chamber 68 which is delimited at the top by the actuating element 56, which thereby acts like a piston. Compressed air can be introduced into the pressure chamber 68 via a compressed air connection and lifts the actuating element 56 against the force of compression springs 70 supported against the housing 58 from the locking position according to FIG.
- openings 74 are closed in the bottom of the housing 58 by screws 72 as closure elements, through which openings, for example with pins, are removed after the screws 72 have been removed can be reached to raise the actuator 56 against the force of the compression springs 70.
- the static mixer 14 must be replaced regularly with a new static mixer when hardened residues of the viscous material have been deposited in the mixing tube 28. This manifests itself regularly in a significant pressure increase in the mixing tube 28 during the material application. Such an increase in pressure can be detected using suitable sensors, and an automatic change of the static mixer 14 can then be carried out by means of a control unit.
- a receiving device 76 is provided (FIG. 3), which has a plate 78, which rests on a table top Stand 80 rests.
- the plate 78 has four open receiving edges 82, in each of which holding means 84 for static mixers 14 are arranged.
- FIG. 3 shows how a static mixer 14 according to FIGS.
- each of the static mixers 14 also has a lower and an upper centering disk 86, 88, which project radially from the mixing tube 28 at a distance from one another.
- the static mixers 14 are always arranged in the receiving device 76 in such a way that the lower centering disk 86 is arranged below the plate 78, while the upper centering disk 88 is arranged above the plate 78.
- the actuating element 56 is then automatically pressurized with compressed air and moves into the release position, so that the fixation of the static mixer 14 on the metering unit 12 is released.
- the metering unit 12 can then be lifted by the robot from the static mixer 14, the lower centering disk 86 holding the static mixer 14 in the receiving device 26 when the metering unit 12 is pulled upwards.
- the robot then moves the metering unit 12 to one of the further static mixers 14 held in the receiving device 76 and places the coupling device 20 on its coupling part 26, the upper centering disk 88 of the further static mixer 14 preventing it from moving downward the receiving device 76 is pushed out.
- the compressed air is then discharged from the pressure chamber 68, so that the compression springs 70 move the actuating element 56 into the locking position and the further static mixer 14 is fixed on the metering unit 12.
- the dosing unit 12 with the further static mixer 14 fixed to it is then moved with the flin
- Another static mixer 14 is removed from the open edge of the plate 78 by means of the robot from the receiving device 76 and used for the further application of two-component adhesive.
- the invention relates to a device 10 for applying an at least two-component viscous material to workpieces with a metering unit 12, which has a number of metering valves 18 and a coupling device 20 corresponding to the number of components of the viscous material, and with a Static mixer 14, which has a mixing tube 28 for mixing the components when passing through from a material inlet 30 at its first end to a material outlet 32 at its second end, and a coupling part 26 detachably fixed to the coupling device 20, wherein the metering valves 18 open into the material inlet 30.
- the coupling device 20 has a plurality of engagement elements 52 for engaging in recesses 50 with open edges on the coupling part 26 and an actuating element 56 which can be moved by means of pressurization by a fluid from a locking position into a release position and which in the locking position has the engagement elements 52 for fixing holds the coupling part 26 on the coupling device 20 in the open-edge recesses 50 and releases them in the release position to release the fixation.
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating Apparatus (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
Vorrichtung zum Aufträgen eines mindestens zweikomponentigen Device for applying an at least two-component
viskosen Materials auf Werkstücke viscous material on workpieces
Die Erfindung betrifft eine Vorrichtung zum Aufträgen eines mindestens zweikom- ponentigen viskosen Materials auf Werkstücke gemäß Oberbegriff des Anspruchs 1 . Solche Vorrichtungen werden beispielsweise bei der Herstellung von Kraftfahr- zeugen verwendet, um mehrkomponentige Materialien, wie beispielsweise zwei- komponentige Klebstoffe, auf Karosseriebauteile aufzutragen. Sie weisen eine Dosiereinheit auf, die eine der Anzahl der Komponenten des viskosen Materials entsprechende Zahl von Dosierventilen sowie eine Kupplungseinrichtung auf- weist, wobei jedes Dosierventil an eine Zuleitung für eine der Komponenten an- geschlossen ist, um die betreffende Komponente dosiert an einen Statikmischer abzugeben. Der Statikmischer weist eine Kupplungspartie auf, mit der er lösbar an der Kupplungseinrichtung der Dosiereinheit fixiert ist, sowie ein Mischrohr, in das die Komponenten von den Dosierventilen eingeleitet werden. Die Komponen- ten werden beim Durchleiten von einem Materialeinlass am ersten Ende des Mischrohrs zu einem Materialauslass am zweiten Ende vermischt, insbesondere indem sie durch eine im Mischrohr angeordnete Mischwendel geleitet werden. Dabei ist der Statikmischer ein Verschleißteil, das sich im Lauf der Zeit durch aushärtende Reste des viskosen Materials zusetzt und von Zeit zu Zeit ausge- tauscht oder gereinigt werden muss. Der Austausch eines Statikmischers erfolgt dabei von Hand, indem die Kupplungspartie von der Kupplungseinrichtung gelöst wird und ein neuer Statikmischer an der Dosiereinheit befestigt wird. Vorbekannte Vorrichtungen weisen als Kupplungsmittel für die Verbindung zwischen der Kupp- lungseinrichtung und der Kupplungspartie eine Bajonettverbindung auf. Das Lö- sen der Bajonettverbindung von Hand wird dabei als aufwendig empfunden, da stets ein Monteur bereitstehen muss, wenn ein Statikmischer ausgetauscht wer- den muss. The invention relates to a device for applying an at least two-component viscous material to workpieces according to the preamble of claim 1. Such devices are used, for example, in the manufacture of motor vehicles in order to apply multicomponent materials, such as, for example, two-component adhesives, to body components. They have a metering unit which has a number of metering valves corresponding to the number of components of the viscous material and a coupling device, each metering valve being connected to a feed line for one of the components in order to meter the respective component to a static mixer , The static mixer has a coupling section with which it is detachably fixed to the coupling device of the metering unit, and a mixing tube into which the components are introduced by the metering valves. The components are mixed as they are passed through from a material inlet at the first end of the mixing tube to a material outlet at the second end, in particular by being passed through a mixing spiral arranged in the mixing tube. The static mixer is a wearing part that over time builds up due to hardening residues of the viscous material and has to be replaced or cleaned from time to time. A static mixer is replaced manually by loosening the coupling section from the coupling device and attaching a new static mixer to the dosing unit. Known devices have a bayonet connection as coupling means for the connection between the coupling device and the coupling part. Detaching the bayonet connection by hand is perceived as complex, since a fitter must always be available when a static mixer has to be replaced.
Es ist daher Aufgabe der Erfindung, eine Vorrichtung der eingangs genannten Art derart weiterzubilden, dass der Austausch des Statikmischers vereinfacht wird. Diese Aufgabe wird erfindungsgemäß durch eine Vorrichtung mit den Merkmalen des Anspruchs 1 sowie durch ein Verfahren mit den Merkmalen des Anspruchs 18 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der abhängi- gen Ansprüche. It is therefore an object of the invention to develop a device of the type mentioned in the introduction in such a way that the replacement of the static mixer is simplified. This object is achieved according to the invention by a device with the features of claim 1 and by a method with the features of claim 18. Advantageous developments of the invention are the subject of the dependent claims.
Der Erfindung liegt der Gedanke zugrunde, den Statikmischer automatisch auszu- tauschen, ohne dass hierfür ein Monteur eingreifen muss. Zu diesem Zweck weist die Kupplungseinrichtung der Dosiereinheit ein Betätigungselement auf, das mit- tels Druckbeaufschlagung durch ein Fluid wie beispielsweise Druckluft von einer Verriegelungsposition in eine Freigabeposition beweglich ist. Die Bewegung von der Freigabeposition in die Verriegelungsposition erfolgt zweckmäßig dadurch, dass das Betätigungselement durch die Kraft mindestens eines elastischen Rück- stellelements in die Verriegelungsposition gedrängt wird, so dass es dort mittels der Kraft des Rückstellelements gehalten wird, sofern es nicht mittels des Fluids druckbeaufschlagt wird. Die Kupplungseinrichtung weist zudem mehrere Ein- griffselemente auf, während die Kupplungspartie des Statikmischers eine ent- sprechende Anzahl von randoffenen Ausnehmungen aufweist, in die die Ein- g riffsei emente eingreifen können. Die Eingriffselemente werden durch das Betäti- gungselement in den randoffenen Ausnehmungen gehalten, wenn dieses sich in der Verriegelungsposition befindet, so dass die Kupplungspartie an der Kupp- lungseinrichtung fixiert ist. In der Freigabeposition des Betätigungselements wer- den die Eingriffselemente zum Lösen der Fixierung freigegeben. Es ist somit mög- lich, mittels Druckbeaufschlagung des Betätigungselements einen nicht mehr funktionsfähigen Statikmischer von der Dosiereinheit abzukoppeln, die Dosierein- heit auf einen neuen Statikmischer aufzusetzen und diesen mit seiner Kupplungs- partie durch Verringerung des das Betätigungselement beaufschlagenden Drucks an der Kupplungseinrichtung der Dosiereinheit zu fixieren. The invention is based on the idea of automatically exchanging the static mixer without a mechanic having to intervene for this. For this purpose, the coupling device of the metering unit has an actuating element which can be moved from a locking position into a release position by means of pressurization by a fluid such as compressed air. The movement from the release position into the locking position expediently takes place in that the actuating element is pushed into the locking position by the force of at least one elastic restoring element, so that it is held there by means of the force of the restoring element unless it is pressurized by the fluid , The coupling device also has a plurality of engagement elements, while the coupling section of the static mixer has a corresponding number of recesses which are open at the edge and into which the engagement elements can engage. The engagement elements are held in the open-edged recesses by the actuating element when it is in the locking position, so that the coupling part is fixed to the coupling device. In the release position of the actuating element released the engagement elements to release the fixation. It is thus possible, by pressurizing the actuating element, to decouple a static mixer that is no longer functional from the metering unit, to place the metering unit on a new static mixer, and to add this with its coupling part to the coupling device of the metering unit by reducing the pressure acting on the actuating element fix.
Besonders vorteilhaft kann der automatische Wechsel des Statikmischers gestal- tet werden, wenn die Vorrichtung eine Aufnahmeeinrichtung für Statikmischer aufweist. Eine solche Aufnahmeeinrichtung, die auch als Wechselbahnhof be- zeichnet werden kann, dient der Aufnahme von baugleichen Statikmischern, die jeweils eine Mischrohr zum Vermischen der Komponenten des viskosen Materials beim Durchleiten vom Materialeinlass am ersten Ende zum Materialauslass am zweiten Ende sowie eine an der Kupplungseinrichtung lösbar fixierbare Kupp- lungspartie aufweisen. Die Aufnahmeeinrichtung weist eine Platte auf, die auch als Tisch bezeichnet werden kann, die mehrere randoffene Aufnahmeöffnungen aufweist, wobei in jeder Aufnahmeöffnung Haltemittel zum Halten eines der Sta- tikmischer angeordnet sind. Zum Wechseln des nicht mehr funktionsfähigen Sta- tikmischers wird die Dosiereinheit mit dem an ihr fixierten Statikmischer mittels eines Roboters zur Aufnahmeeinrichtung bewegt, und der Statikmischer wird seit- lieh über den offenen Rand in eine der Aufnahmeöffnungen eingeführt und mittels der Haltemittel dort gehaltert. Anschließend wird das Betätigungselement durch Druckbeaufschlagung mittels des Fluids in die Freigabestellung bewegt, so dass die Fixierung der Kupplungspartie an der Kupplungseinrichtung aufgehoben wird. Sodann wird die Dosiereinheit mittels des Roboters vom Statikmischer abgehoben und auf einen weiteren, in einer anderen Aufnahmeöffnung der Aufnahmeeinrich- tung gehalterten Statikmischer aufgesetzt. Durch Verminderung der Druckbeauf- schlagung wird das Betätigungselement wieder in die Verriegelungsposition be- wegt, so dass die Kupplungspartie des weiteren Statikmischers an der Kupp- lungseinrichtung fixiert wird. Zu guter Letzt wird die Dosiereinheit mit dem an ihr fixierten weiteren Statikmischer mittels des Roboters durch den offenen Rand aus der Aufnahmeöffnung von der Aufnahmeeinrichtung weg bewegt und kann wieder zum Aufträgen von viskosem Material verwendet werden. The automatic change of the static mixer can be designed particularly advantageously if the device has a receiving device for static mixer. Such a receiving device, which can also be referred to as a change station, serves to accommodate structurally identical static mixers, each of which has a mixing tube for mixing the components of the viscous material when passing through from the material inlet at the first end to the material outlet at the second end, and one that is detachable at the coupling device have fixable coupling part. The receiving device has a plate, which can also be referred to as a table, which has a plurality of receiving openings which are open at the edge, holding means for holding one of the static mixers being arranged in each receiving opening. To change the static mixer, which is no longer functional, the dosing unit with the static mixer fixed to it is moved to the receiving device by means of a robot, and the static mixer is then inserted into one of the receiving openings via the open edge and held there by means of the holding means. The actuating element is then moved into the release position by pressurizing the fluid, so that the fixing of the coupling part to the coupling device is released. The dosing unit is then lifted off the static mixer by means of the robot and placed on another static mixer held in another receiving opening of the receiving device. By reducing the pressurization, the actuating element is moved back into the locking position, so that the coupling part of the further static mixer is fixed to the coupling device. Finally, the dosing unit with the additional static mixer attached to it is moved out through the open edge by means of the robot moved the receiving opening away from the receiving device and can be used again for the application of viscous material.
Insbesondere kann der Wechsel des Statikmischers mittels einer Steuereinheit automatisch eingeleitet werden, wenn eine gemessene Kenngröße der Vorrich- tung um mehr als einen vorgegebenen Toleranzwert von einem vorgegebenen Sollwert abweicht. Die Kenngröße kann beispielsweise der Druck im Statikmi- scher sein, der mittels eines Drucksensors gemessen wird und dann über einen tolerierbaren Wert ansteigt, wenn sich der Statikmischer mit ausgehärtetem Mate- rial teilweise zugesetzt hat. Es wird bevorzugt, dass die Kupplungspartie in die Kupplungseinrichtung eingreift und dass die randoffenen Ausnehmungen zu einer äußeren Mantelfläche der Kupplungspartie offen sind. Dadurch wird eine stabile Verbindung zwischen der Dosiereinheit und dem Statikmischer erzielt. Zudem kann vorteilhaft vorgesehen sein, dass die randoffenen Ausnehmungen unter Ausbildung einer umlaufenden Ringnut miteinander verbunden sind, wobei die Ringnut über ihre gesamte Länge zweckmäßig einen konstanten Querschnitt aufweist. Dies erleichtert die Positio- nierung der Dosiereinheit bezüglich des Statikmischers, wenn dieser an die Do- siereinheit angekuppelt wird. Die Dosiereinheit kann dann beliebig um eine Längsmittelachse des Mischrohrs verdreht auf den Statikmischer aufgesetzt wer- den, wenn die Eingriffselemente an beliebigen, die randoffenen Ausnehmungen bildenden Stellen der Ringnut eingreifen können. In particular, the change of the static mixer can be initiated automatically by means of a control unit if a measured parameter of the device deviates from a predetermined target value by more than a predetermined tolerance value. The parameter can be, for example, the pressure in the static mixer, which is measured by means of a pressure sensor and then rises above a tolerable value when the static mixer with hardened material has partially clogged. It is preferred that the coupling section engages in the coupling device and that the open-edged recesses are open to an outer lateral surface of the coupling section. This ensures a stable connection between the dosing unit and the static mixer. In addition, it can advantageously be provided that the open-edged recesses are connected to one another to form a circumferential annular groove, the annular groove expediently having a constant cross section over its entire length. This makes it easier to position the dosing unit with respect to the static mixer when it is coupled to the dosing unit. The metering unit can then be placed on the static mixer rotated as desired about a longitudinal center axis of the mixing tube if the engagement elements can engage at any point in the annular groove forming the recesses which are open at the edges.
Es ist möglich, dass das Betätigungselement mehrstückig ausgebildet ist, wobei jedes der Stücke in der Verriegelungsposition eines der Eingriffselemente beauf- schlagt. Ein einfacherer Aufbau wird jedoch erzielt, wenn die Abschnitte des Betä- tigungselements, die in der Verriegelungsposition jeweils eines der Eingriffsele- mente beaufschlagen, starr miteinander verbunden sind und gemeinsam in die Verriegelungsposition und wieder zurück in die Freigabeposition beweglich sind. It is possible for the actuating element to be designed in several pieces, with each of the pieces acting on one of the engaging elements in the locking position. A simpler construction is achieved, however, if the sections of the actuating element which each act on one of the engagement elements in the locking position are rigidly connected to one another and can be moved together into the locking position and back again into the release position.
Zweckmäßig weist die Kupplungseinrichtung ein Gehäuse auf, in dem das Betäti- gungselement zwischen der Verriegelungsposition und der Freigabeposition be- weglich ist, wobei diese Bewegung zweckmäßig linear erfolgt. Dabei wird weiter bevorzugt, dass das Gehäuse einen auf einer Seite durch das Betätigungsele- ment begrenzten Druckraum sowie Mittel zum Ein- und Ausleiten des Fluids in den und aus dem Druckraum aufweist. Das Betätigungselement wirkt dann wie ein Kolben, der vom Fluid, vorzugsweise Druckluft, mit Druck beaufschlagt wird. Zweckmäßig weist das Gehäuse eine den Druckraum auf der dem Betätigungs- element abgewandten Seite begrenzende Bodenwand auf, in der mindestens eine durch ein herausnehmbares Verschlusselement verschlossene Öffnung angeord- net ist. Steht, beispielsweise bei einem Ausfall eines Druckluftkompressors, kein Fluid zur Verfügung, um das Betätigungselement zu beaufschlagen, so kann durch die Öffnung(en) eingegriffen werden, um das Betätigungselement in die Freigabeposition zu bewegen. Weiter wird bevorzugt, dass die Eingriffselemente im Gehäuse gelagert sind. Sie sind zweckmäßig als Kugeln ausgebildet, die ein- fach herstellbar und zudem ohne großen Kraftaufwand beweglich sind, da sie ei- ne glatte Oberfläche aufweisen, über die das Betätigungselement gleiten kann, und da sie um beliebige Drehachsen drehbar sind. The coupling device expediently has a housing in which the actuating element is located between the locking position and the release position. is movable, this movement advantageously being linear. It is further preferred that the housing has a pressure space delimited on one side by the actuating element and means for introducing and discharging the fluid into and out of the pressure space. The actuating element then acts like a piston which is pressurized by the fluid, preferably compressed air. The housing expediently has a bottom wall delimiting the pressure chamber on the side facing away from the actuating element and in which at least one opening is closed by a removable closure element. If, for example in the event of a compressed air compressor failure, there is no fluid available to act on the actuating element, then intervention can be made through the opening (s) in order to move the actuating element into the release position. It is further preferred that the engagement elements are mounted in the housing. They are expediently designed as balls which are simple to produce and can also be moved without great effort, since they have a smooth surface over which the actuating element can slide and because they can be rotated about any axes of rotation.
Vorzugsweise sind die Eingriffselemente durch Beaufschlagung mittels Betäti- gungsflächen am Betätigungselement bei dessen Bewegung in die Verriege- lungsposition in radialer Richtung aufeinander zu beweglich. Sie verengen dann den Querschnitt der Kupplungseinrichtung im Bereich der randoffenen Ausneh- mungen bzw. im Bereich der umlaufenden Ringnut. Des Weiteren wird bevorzugt, dass das Betätigungselement Rückzugsräume zur Aufnahme der Eingriffselemen- te in der Freigabeposition aufweist. In die Rückzugsräume können sich die Ein- griffselemente zurückziehen, wenn sie aus den randoffenen Ausnehmungen bzw. aus der die randoffenen Ausnehmungen bildenden Ringnut verdrängt werden sol- len, um die Fixierung des Statikmischers an der Dosiereinheit aufzuheben. Um eine Bewegung der Eingriffselemente in die randoffenen Ausnehmungen bei einer Bewegung des Betätigungselements in die Verriegelungsposition zu erleichtern, ist vorteilhaft vorgesehen, dass das Betätigungselement jeweils eine Betätigungs- fläche mit einem Rückzugsraum verbindende, mit der jeweiligen Betätigungsflä- che einen Winkel von mehr als 180° und weniger als 270° einschließende Auf- laufschrägen aufweist, so dass die Eingriffselemente bei der Bewegung des Betä- tigungselements von der Freigabeposition in die Verriegelungsposition kontinuier- lich vorgeschoben werden. The engaging elements are preferably movable towards one another in the radial direction by acting on the actuating surfaces on the actuating element when it is moved into the locking position. They then narrow the cross section of the coupling device in the region of the open-edged recesses or in the region of the circumferential annular groove. Furthermore, it is preferred that the actuating element has retreat spaces for receiving the engagement elements in the release position. The engagement elements can withdraw into the retreat spaces if they are to be displaced from the open-ended recesses or from the annular groove forming the open-edge recesses in order to remove the fixation of the static mixer on the metering unit. In order to facilitate movement of the engagement elements into the open-edged recesses when the actuating element moves into the locking position, it is advantageously provided that the actuating element in each case connects an actuating surface with a retraction space and an angle of more than 180 ° with the respective actuating surface and less than 270 ° enclosing has tapered slopes so that the engagement elements are continuously advanced when the actuating element moves from the release position into the locking position.
Zweckmäßig ist die Kupplungspartie lösbar mit dem Mischrohr verbunden. Die Kupplungspartie kann dann, wenn das Mischrohr durch Material zugesetzt ist und entweder weggeworfen oder gereinigt werden muss, vom Mischrohr gelöst und an einem neuen Mischrohr angebracht und somit wieder verwendet werden. The coupling part is expediently detachably connected to the mixing tube. When the mixing tube is clogged with material and must either be thrown away or cleaned, the coupling section can be detached from the mixing tube and attached to a new mixing tube and thus used again.
Mit der erfindungsgemäßen Vorrichtung können unterschiedliche Arten von Mischrohren verwendet werden. Dabei ist es möglich, dass das Mischrohr starr ist und aus Metall besteht. Zweckmäßig ist in einem solchen Mischrohr eine eben- falls aus Metall gefertigte Mischwendel lösbar eingesetzt. Solche Mischrohre wer- den in der Regel, wenn sie durch ausgehärtetes Material zugesetzt sind, gerei- nigt, indem die Mischwendel herausgenommen wird und die Bauteile einzeln mit- tels Reinigungsflüssigkeit gereinigt werden. Meist weist das Mischrohr aber ein den Materialeinlass und den Materialauslass aufweisenden Innenrohr aus Kunst- stoff und ein das Innenrohr zumindest über den Großteil seiner Länge aufneh- mendes Stützrohr aus Metall auf. Im Innenrohr ist dann wiederum meist eine Mischwendel angeordnet, die ebenfalls zweckmäßig aus Kunststoff gefertigt ist.Different types of mixing tubes can be used with the device according to the invention. It is possible that the mixing tube is rigid and made of metal. A mixing helix which is also made of metal is expediently inserted in such a mixing tube. Such mixing tubes are generally cleaned when they are clogged by hardened material by removing the mixing spiral and cleaning the components individually using cleaning fluid. Usually, however, the mixing tube has an inner tube made of plastic which has the material inlet and the material outlet and a support tube made of metal which receives the inner tube at least over most of its length. A mixing helix is then usually arranged in the inner tube, which is also expediently made of plastic.
Ist das Mischrohr mit ausgehärtetem Material zugesetzt, so wird das Innenrohr aus dem Stützrohr entfernt und weggeworfen, während das Stützrohr wieder ver- wendet werden kann, indem ein neues Innenrohr eingesetzt wird. Das Stützrohr liegt mit seiner Innenfläche an der äußeren Mantelfläche des Innenrohrs an und verhindert ein Aufweiten des Innenrohrs unter Druck. Zudem definiert das Stütz- rohr den Ort des Materialauslasses, da es im Gegensatz zum Innenrohr aus Kunststoff nicht oder nur wenig biegsam ist. If the mixing tube with hardened material is clogged, the inner tube is removed from the supporting tube and thrown away, while the supporting tube can be used again by inserting a new inner tube. The inner surface of the support tube lies against the outer lateral surface of the inner tube and prevents the inner tube from expanding under pressure. In addition, the support tube defines the location of the material outlet, since, in contrast to the inner tube made of plastic, it is not or only slightly flexible.
Zur Positionierung in der oben beschriebenen Aufnahmeeinrichtung bzw. im Wechselbahnhof weist der Statikmischer vorteilhaft zwei vom Mischrohr radial abstehende, in axialer Richtung im Abstand zueinander angeordnete Zentrier- scheiben auf. Die Statikmischer werden dann so in den Wechselbahnhof einge- setzt, dass eine erste Zentrierscheibe oberhalb und eine zweite Zentrierschreibe unterhalb der Platte angeordnet ist. Die obere Zentrierscheibe verhindert ein Ausweichen des Statikmischers nach unten, wenn der Roboter die Dosiereinheit auf die Kupplungspartie aufsetzt. Die untere Zentrierscheibe verhindert ein Fler- ausziehen des Statikmischers nach oben aus der Platte, wenn nach Bewegen des Betätigungselements in die Freigabestellung der Roboter die Dosiereinheit von der Kupplungspartie abhebt. For positioning in the receiving device described above or in the change station, the static mixer advantageously has two centering disks which protrude radially from the mixing tube and are spaced apart in the axial direction. The static mixers are then inserted into the change station sets that a first centering disc is arranged above and a second centering disc below the plate. The upper centering disc prevents the static mixer from moving downwards when the robot places the dosing unit on the coupling section. The lower centering disc prevents the static mixer from being pulled upwards out of the plate when the dosing unit lifts off the coupling section after moving the actuating element into the release position of the robot.
Im Folgenden wird die Erfindung anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert. Es zeigen Fig. 1 a, 1 b eine Auftragsvorrichtung für zweikomponentiges viskoses Material in einer Teildarstellung im Schnitt mit an einer Dosiereinheit fixiertem Statikmischer sowie mit von der Dosiereinheit losgelöstem Statikmi- scher; The invention is explained in more detail below on the basis of an exemplary embodiment shown schematically in the drawing. 1 a, 1 b show an application device for two-component viscous material in a partial representation in section with a static mixer fixed to a dosing unit and with a static mixer detached from the dosing unit;
Fig. 2a, 2b den Statikmischer gemäß Figur 1 a, 1 b teilweise zerlegt in perspekti- vischer Ansicht sowie im Schnitt und 2a, 2b the static mixer according to FIG. 1 a, 1 b partially disassembled in perspective view and in section and
Fig. 3 eine Aufnahmeeinrichtung für Statikmischer. Fig. 3 is a receiving device for static mixers.
Die in der Zeichnung (Fig. 1 a, 1 b) teilweise dargestellte Vorrichtung 10 dient dem Aufträgen eines zweikomponentigen Klebstoffs auf Werkstücke. Sie weist eine Doisereinheit 12 sowie einen Statikmischer 14 auf, die mittels eines nicht darge- stellten Roboters während des Auftragsvorgangs relativ zu den Werkstücken be- wegt wird. Die Dosiereinheit 12 weist einen in Fig. 1 a, 1 b nur teilweise gezeigten Ventilblock 16 mit zwei Dosierventilen 18 auf, die als Nadelventile ausgebildet sind. Des Weiteren weist die Dosiereinheit 12 eine Kupplungseinrichtung 20 auf, die lösbar und fest mit dem Ventilblock 16 verbunden ist, und in der die Ventilsitze 22 angeordnet sind. Die Ventilnadeln 24 erstrecken sich in die Kupplungseinrich- tung 20 und öffnen und schließen die Dosierventile 18 an den Ventilsitzen 22. Der Statikmischer 14 weist eine Kupplungspartie 26 auf, die in die Kupplungsein- richtung 20 eingreift (Fig. 1 a) und lösbar an dieser fixiert ist. Der Statikmischer 14 weist zudem ein Mischrohr 28 auf, das sich von einem Materialeinlass 30 an sei- nem ersten Ende bis zu einem Materialauslass 32 an seinem zweiten Ende er- streckt. Das Mischrohr ist am Materialeinlass 30 aufgeweitet und kommuniziert dort mit den Dosierventilen 18. Am Materialauslass 32 ist es konisch verengt. Es weist ein den Materialeinlass 30 und den Materialauslass 32 aufweisendes Innen- rohr 34 aus Kunststoff auf, in dem eine Mischwendel 36 angeordnet ist. Zudem weist es ein Stützrohr 38 aus Metall auf, das sich über den größten Teil der Länge des Innenrohrs 34 erstreckt und an dessen äußerer Mantelfläche 40 anliegt. Beim Auftrag des zweikomponentigen Klebstoffs werden die beiden Komponenten (Ba- siskomponente und Härter) jeweils mittels eines der Dosierventile 18 dosiert in den Materialeinlass 30 abgegeben und zunächst noch durch eine Trennwand 42 getrennt der Mischwendel 36 zugeführt. In der Mischwendel 36 vermischen sich die beiden Komponenten auf ihrem Weg zum Materialauslass 32. Die Kupplungs- partie 26 ist Bestandteil eines Adapters 44, der lösbar mit dem Stützrohr 38 ver- bunden ist und zu diesem Zweck ein Innengewinde 46 zum Aufschrauben auf ein Außengewinde am Stützrohr 38 aufweist. The device 10 partially shown in the drawing (FIGS. 1 a, 1 b) is used to apply a two-component adhesive to workpieces. It has a doiser unit 12 and a static mixer 14 which is moved relative to the workpieces by means of a robot (not shown) during the application process. The metering unit 12 has a valve block 16, only partially shown in FIGS. 1 a, 1 b, with two metering valves 18, which are designed as needle valves. Furthermore, the metering unit 12 has a coupling device 20, which is detachably and firmly connected to the valve block 16 and in which the valve seats 22 are arranged. The valve needles 24 extend into the coupling device 20 and open and close the metering valves 18 on the valve seats 22. The static mixer 14 has a coupling section 26 which engages in the coupling device 20 (FIG. 1 a) and is detachably fixed thereon. The static mixer 14 also has a mixing tube 28 which extends from a material inlet 30 at its first end to a material outlet 32 at its second end. The mixing tube is expanded at the material inlet 30 and communicates there with the metering valves 18. At the material outlet 32, it is conically narrowed. It has an inner tube 34 made of plastic, which has the material inlet 30 and the material outlet 32, in which a mixing spiral 36 is arranged. In addition, it has a support tube 38 made of metal, which extends over most of the length of the inner tube 34 and bears against the outer lateral surface 40 thereof. When the two-component adhesive is applied, the two components (base component and hardener) are each metered into the material inlet 30 by means of one of the metering valves 18 and are first fed separately to the mixing spiral 36 by a partition 42. The two components mix in the mixing spiral 36 on their way to the material outlet 32. The coupling part 26 is part of an adapter 44 which is detachably connected to the support tube 38 and for this purpose an internal thread 46 for screwing onto an external thread Has support tube 38.
Zur Fixierung an der Kupplungseinrichtung 20 weist die Kupplungspartie 26 eine umlaufende Ringnut 50 auf, die über den gesamten Umfang einen konstanten Querschnitt aufweist. In der Kupplungseinrichtung 20 sind Metallkugeln 52 unver- lierbar aufgenommen, die zum Eingriff in die Ringnut 50 bestimmte Eingriffsele- mente darstellen, um die Kupplungspartie 26 in der Kupplungseinrichtung 20 zu fixieren. Die Ringnut 50 bildet somit eine kontinuierliche Abfolge von randoffenen Ausnehmungen 50 in der äußeren Mantelfläche 54 der Kupplungspartie 26. Zur Beaufschlagung der Kugeln 52 weist die Kupplungseinrichtung 20 ein ringförmi- ges Betätigungselement 56 auf, das in einem Gehäuse 58 der Kupplungseinrich- tung 20 zwischen einer Verriegelungsposition (Fig. 1 a) und einer Freigabepositi- on (Fig. 1 b) linear verschieblich ist. Das Betätigungselement 56 weist Betäti- gungsflächen 60 auf, die in der Verriegelungsposition gemäß Fig. 1 a die Kugeln beaufschlagen und sie in Richtung zu einer Längsmittelachse 62 des Statikmi- schers 14 in die Ringnut 50 drücken und dort halten, um die Kupplungspartie 26 an der Kupplungseinrichtung 20 zu fixieren. Das Betätigungselement 56 weist zudem für jede Kugel einen Rückzugsraum 64 auf, in den sich die jeweilige Kugel 50 von der Längsmittelachse 62 weg zurückziehen kann, wenn sich das Betäti- gungselement 56 gemäß Fig. 1 b in der Freigabeposition befindet. Zwischen den Rückzugsräumen 64, die wiederum rings umlaufend miteinander verbunden sein können, und den Betätigungsflächen 60 ist jeweils eine Auflaufschräge 66 ange- ordnet, an der beim Bewegen des Betätigungselements 56 von der Freigabeposi- tion in die Verriegelungsposition die jeweilige Kugel 50 abgleiten kann, und die mit der zugehörigen Betätigungsfläche 60 einen Winkel von ca. 225° einschließt. Zur Bewegung des Betätigungselements 56 weist das Gehäuse 58 einen Druck- raum 68 auf, der nach oben hin durch das Betätigungselement 56 begrenzt ist, das dadurch wie ein Kolben wirkt. In den Druckraum 68 ist über einen Druckluft- anschluss Druckluft einleitbar, die das Betätigungselement 56 gegen die Kraft von gegen das Gehäuse 58 abgestützten Druckfedern 70 aus der Verriegelungsposi- tion gemäß Fig. 1 a in die Freigabeposition gemäß Fig. 1 b anhebt. Die Druckfe- dern 70 drängen das Betätigungselement 56 in drucklosem Zustand nach unten und halten es in der Verriegelungsposition. Um den Statikmischer 14 von der Do- siereinheit lösen zu können, wenn keine Druckluft zur Verfügung steht, sind im Boden des Gehäuses 58 durch Schrauben 72 als Verschlusselemente verschlos- sene Öffnungen 74 angeordnet, durch die nach Entfernen der Schrauben 72 bei- spielsweise mit Stiften durchgegriffen werden kann, um das Betätigungselement 56 gegen die Kraft der Druckfedern 70 anzuheben. For fixing to the coupling device 20, the coupling part 26 has a circumferential annular groove 50 which has a constant cross section over the entire circumference. Metal balls 52 are non-detachably received in the coupling device 20, which represent certain engagement elements for engagement in the annular groove 50 in order to fix the coupling part 26 in the coupling device 20. The annular groove 50 thus forms a continuous sequence of open-cut recesses 50 in the outer lateral surface 54 of the coupling part 26. To act on the balls 52, the coupling device 20 has an annular actuating element 56 which is located in a housing 58 of the coupling device 20 between a Locking position (Fig. 1 a) and a release position (Fig. 1 b) is linearly displaceable. The actuating element 56 has actuating surfaces 60 which act on the balls in the locking position according to FIG. 1 a and move them in the direction of a longitudinal central axis 62 of the static Press the shear 14 into the annular groove 50 and hold it there in order to fix the coupling part 26 to the coupling device 20. The actuating element 56 also has a retraction space 64 for each ball, into which the respective ball 50 can retract away from the longitudinal central axis 62 when the actuating element 56 according to FIG. 1b is in the release position. Between the retraction spaces 64, which in turn can be connected to one another all around, and the actuating surfaces 60 there is in each case a run-up slope 66, on which the respective ball 50 can slide when the actuating element 56 is moved from the release position into the locking position, and which encloses an angle of approximately 225 ° with the associated actuating surface 60. For moving the actuating element 56, the housing 58 has a pressure chamber 68 which is delimited at the top by the actuating element 56, which thereby acts like a piston. Compressed air can be introduced into the pressure chamber 68 via a compressed air connection and lifts the actuating element 56 against the force of compression springs 70 supported against the housing 58 from the locking position according to FIG. 1 a into the release position according to FIG. 1 b. The pressure springs 70 push the actuating element 56 down in the depressurized state and hold it in the locking position. In order to be able to detach the static mixer 14 from the metering unit when no compressed air is available, openings 74 are closed in the bottom of the housing 58 by screws 72 as closure elements, through which openings, for example with pins, are removed after the screws 72 have been removed can be reached to raise the actuator 56 against the force of the compression springs 70.
Der Statikmischer 14 muss regelmäßig dann gegen einen neuen Statikmischer ausgetauscht werden, wenn sich im Mischrohr 28 ausgehärtete Reste des visko- sen Materials abgelagert haben. Dies äußert sich regelmäßig in einem signifikan ten Druckanstieg im Mischrohr 28 während des Materialauftrags. Ein solcher Druckanstieg kann mit geeigneten Sensoren detektiert werden, und mittels einer Steuereinheit kann dann ein automatischer Wechsel des Statikmischers 14 durchgeführt werden. Zu diesem Zweck ist eine Aufnahmeeinrichtung 76 vorge- sehen (Fig. 3), die eine Platte 78 aufweist, die wie eine Tischplatte auf einem Ständer 80 ruht. Die Platte 78 weist vier randoffene Aufnahmeöffnungen 82 auf, in denen jeweils Haltemittel 84 für Statikmischer 14 angeordnet sind. In Fig. 3 ist dargestellt, wie in drei Aufnahmeöffnungen 82 jeweils ein Statikmischer 14 gemäß Fig. 2a, 2b aufgenommen ist, während die vierte Aufnahmeöffnung 82 leer ist. Wenn die Steuereinheit erkennt, dass der an der Dosiereinheit 12 fixierte Statik mischer 14 ausgetauscht werden muss, wird die Dosiereinheit 12 mit dem Statik- mischer 14 vom Roboter zur Aufnahmeeinrichtung 76 bewegt und das Mischrohr 28 wird in radialer Richtung in die freie Aufnahmeöffnung 82 eingeführt, wobei der Materialauslass 32 nach unten und die Kupplungspartie 26 nach oben weist. Das Mischrohr 28 rastet zwischen den Haltemitteln 84 ein, die es an einem Herausfal- len durch den offenen Rand hindern. Jeder der Statikmischer 14 weist zudem ei- ne untere und eine obere Zentrierscheibe 86, 88 auf, die im Abstand zueinander jeweils radial vom Mischrohr 28 abstehen. Dabei werden die Statikmischer 14 stets so in der Aufnahmeeinrichtung 76 angeordnet, dass die untere Zentrier- scheibe 86 unter der Platte 78 angeordnet ist, während die obere Zentrierscheibe 88 über der Platte 78 angeordnet ist. Das Betätigungselement 56 wird dann au- tomatisch mit Druckluft beaufschlagt und bewegt sich in die Freigabeposition, so dass die Fixierung des Statikmischers 14 an der Dosiereinheit 12 aufgehoben wird. Die Dosiereinheit 12 kann dann vom Roboter vom Statikmischer 14 abgeho- ben werden, wobei die untere Zentrierscheibe 86 den Statikmischer 14 in der Aufnahmeeinrichtung 26 hält, wenn die Dosiereinheit 12 nach oben weggezogen wird. The static mixer 14 must be replaced regularly with a new static mixer when hardened residues of the viscous material have been deposited in the mixing tube 28. This manifests itself regularly in a significant pressure increase in the mixing tube 28 during the material application. Such an increase in pressure can be detected using suitable sensors, and an automatic change of the static mixer 14 can then be carried out by means of a control unit. For this purpose, a receiving device 76 is provided (FIG. 3), which has a plate 78, which rests on a table top Stand 80 rests. The plate 78 has four open receiving edges 82, in each of which holding means 84 for static mixers 14 are arranged. FIG. 3 shows how a static mixer 14 according to FIGS. 2a, 2b is received in three receiving openings 82, while the fourth receiving opening 82 is empty. If the control unit detects that the static mixer 14 fixed to the dosing unit 12 has to be replaced, the dosing unit 12 is moved with the static mixer 14 from the robot to the receiving device 76 and the mixing tube 28 is inserted in the radial direction into the free receiving opening 82. with the material outlet 32 pointing downwards and the coupling part 26 pointing upwards. The mixing tube 28 engages between the holding means 84, which prevent it from falling out through the open edge. Each of the static mixers 14 also has a lower and an upper centering disk 86, 88, which project radially from the mixing tube 28 at a distance from one another. The static mixers 14 are always arranged in the receiving device 76 in such a way that the lower centering disk 86 is arranged below the plate 78, while the upper centering disk 88 is arranged above the plate 78. The actuating element 56 is then automatically pressurized with compressed air and moves into the release position, so that the fixation of the static mixer 14 on the metering unit 12 is released. The metering unit 12 can then be lifted by the robot from the static mixer 14, the lower centering disk 86 holding the static mixer 14 in the receiving device 26 when the metering unit 12 is pulled upwards.
Der Roboter bewegt anschließend die Dosiereinheit 12 zu einem der weiteren, in der Aufnahmeeinrichtung 76 gehalterten Statikmischer 14 und setzt die Kupp- lungseinrichtung 20 auf dessen Kupplungspartie 26 auf, wobei die obere Zentrier- scheibe 88 des weiteren Statikmischers 14 verhindert, dass dieser nach unten aus der Aufnahmeeinrichtung 76 hinausgedrückt wird. Anschließend wird die Druckluft aus dem Druckraum 68 abgelassen, so dass die Druckfedern 70 das Betätigungselement 56 in die Verriegelungsposition bewegen und der weitere Statikmischer 14 an der Dosiereinheit 12 fixiert wird. Die Dosiereinheit 12 mit dem an ihr fixierten weiteren Statikmischer 14 wird dann unter Flinausbewegen des weiteren Statikmischers 14 aus dem offenen Rand der Platte 78 mittels des Robo- ters von der Aufnahmeeinrichtung 76 entfernt und zum weiteren Auftrag von zwei- komponentigem Klebstoff benutzt. The robot then moves the metering unit 12 to one of the further static mixers 14 held in the receiving device 76 and places the coupling device 20 on its coupling part 26, the upper centering disk 88 of the further static mixer 14 preventing it from moving downward the receiving device 76 is pushed out. The compressed air is then discharged from the pressure chamber 68, so that the compression springs 70 move the actuating element 56 into the locking position and the further static mixer 14 is fixed on the metering unit 12. The dosing unit 12 with the further static mixer 14 fixed to it is then moved with the flin Another static mixer 14 is removed from the open edge of the plate 78 by means of the robot from the receiving device 76 and used for the further application of two-component adhesive.
Zusammenfassend ist folgendes festzuhalten: Die Erfindung betrifft eine Vorrich- tung 10 zum Aufträgen eines mindestens zweikomponentigen viskosen Materials auf Werkstücke mit einer Dosiereinheit 12, die eine der Zahl der Komponenten des viskosen Materials entsprechende Zahl von Dosierventilen 18 sowie eine Kupplungseinrichtung 20 aufweist, und mit einem Statikmischer 14, der ein Misch- rohr 28 zum Vermischen der Komponenten beim Durchleiten von einem Material- einlass 30 an seinem ersten Ende zu einem Materialauslass 32 an seinem zwei- ten Ende sowie eine lösbar an der Kupplungseinrichtung 20 fixierte Kupplungs- partie 26 aufweist, wobei die Dosierventile 18 in den Materialeinlass 30 münden. Erfindungsgemäß ist vorgesehen, dass die Kupplungseinrichtung 20 mehrere Eingriffselemente 52 zum Eingreifen in randoffene Ausnehmungen 50 an der Kupplungspartie 26 sowie ein mittels Druckbeaufschlagung durch ein Fluid von einer Verriegelungsposition in eine Freigabeposition bewegliches Betätigungs- element 56 aufweist, das in der Verriegelungsposition die Eingriffselemente 52 zur Fixierung der Kupplungspartie 26 an der Kupplungseinrichtung 20 in den randoffenen Ausnehmungen 50 hält und sie in der Freigabeposition zum Lösen der Fixierung freigibt. In summary, the following can be stated: The invention relates to a device 10 for applying an at least two-component viscous material to workpieces with a metering unit 12, which has a number of metering valves 18 and a coupling device 20 corresponding to the number of components of the viscous material, and with a Static mixer 14, which has a mixing tube 28 for mixing the components when passing through from a material inlet 30 at its first end to a material outlet 32 at its second end, and a coupling part 26 detachably fixed to the coupling device 20, wherein the metering valves 18 open into the material inlet 30. According to the invention, it is provided that the coupling device 20 has a plurality of engagement elements 52 for engaging in recesses 50 with open edges on the coupling part 26 and an actuating element 56 which can be moved by means of pressurization by a fluid from a locking position into a release position and which in the locking position has the engagement elements 52 for fixing holds the coupling part 26 on the coupling device 20 in the open-edge recesses 50 and releases them in the release position to release the fixation.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018119838.8 | 2018-08-15 | ||
| DE102018119838.8A DE102018119838A1 (en) | 2018-08-15 | 2018-08-15 | Device for applying an at least two-component viscous material to workpieces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2020035228A1 true WO2020035228A1 (en) | 2020-02-20 |
Family
ID=67514567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2019/068584 Ceased WO2020035228A1 (en) | 2018-08-15 | 2019-07-10 | Apparatus for applying an at least two-component viscous material to workpieces |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102018119838A1 (en) |
| WO (1) | WO2020035228A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113967563A (en) * | 2020-07-09 | 2022-01-25 | 苏州振州机电科技有限公司 | Mixed rotary gluing head |
| WO2022089932A1 (en) * | 2020-10-26 | 2022-05-05 | Dürr Systems Ag | Changing system and method for changing a mixer |
| WO2023194633A1 (en) * | 2021-04-16 | 2023-10-12 | Jose Antonio Mata Vasco | Automatic resin mixer exchange device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019121347A1 (en) | 2019-08-07 | 2021-02-11 | Atlas Copco Ias Gmbh | Monitoring process and application device for multi-component viscous material |
| LU502629B1 (en) * | 2022-08-05 | 2024-02-08 | Loewe Fenster Loeffler Gmbh | Application system |
| DE102023116174A1 (en) * | 2023-06-21 | 2024-12-24 | Scheugenpflug Gmbh | Device for applying a multi-component viscous material to workpieces |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5499745A (en) * | 1994-02-18 | 1996-03-19 | Nordson Corporation | Apparatus for mixing and dispensing two chemically reactive materials |
| US6698617B1 (en) * | 2002-09-13 | 2004-03-02 | Ford Motor Company | System and method of changing a disposable nozzle tip for dispensing reactant mixtures |
| US20170198849A1 (en) * | 2014-05-28 | 2017-07-13 | Parker Hannifin Manufacturing France Sas | Connection system for connecting to devices with fluid connection between the two devices |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4453745A (en) * | 1981-08-17 | 1984-06-12 | Nelson Norman A | Lockdown mechanism for wellhead connector |
| US5413253A (en) * | 1993-12-06 | 1995-05-09 | Coltene/Whaledent, Inc. | Static mixer |
| DE59904990D1 (en) * | 1998-10-14 | 2003-05-15 | Kettenbach Gmbh & Co Kg | DEVICE FOR DISCHARGING A PASTOUS TWO-COMPONENT MIXTURE |
| DE10033748A1 (en) * | 2000-07-12 | 2002-01-24 | Fischer Artur Werke Gmbh | Cartridge for dispensing a mass |
| US6921111B2 (en) * | 2003-06-10 | 2005-07-26 | Silvatech Global Systems Inc. | Remotely actuated quick-release coupling |
| CN105050732B (en) * | 2012-10-23 | 2017-03-22 | 苏舍米克斯帕克有限公司 | Discharging device |
| US10281074B2 (en) * | 2016-01-14 | 2019-05-07 | Nordson Corporation | Adapters for connecting a separated-outlet fluid cartridge to a single-inlet mixer, and related methods |
-
2018
- 2018-08-15 DE DE102018119838.8A patent/DE102018119838A1/en active Pending
-
2019
- 2019-07-10 WO PCT/EP2019/068584 patent/WO2020035228A1/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5499745A (en) * | 1994-02-18 | 1996-03-19 | Nordson Corporation | Apparatus for mixing and dispensing two chemically reactive materials |
| US6698617B1 (en) * | 2002-09-13 | 2004-03-02 | Ford Motor Company | System and method of changing a disposable nozzle tip for dispensing reactant mixtures |
| US20170198849A1 (en) * | 2014-05-28 | 2017-07-13 | Parker Hannifin Manufacturing France Sas | Connection system for connecting to devices with fluid connection between the two devices |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113967563A (en) * | 2020-07-09 | 2022-01-25 | 苏州振州机电科技有限公司 | Mixed rotary gluing head |
| WO2022089932A1 (en) * | 2020-10-26 | 2022-05-05 | Dürr Systems Ag | Changing system and method for changing a mixer |
| WO2023194633A1 (en) * | 2021-04-16 | 2023-10-12 | Jose Antonio Mata Vasco | Automatic resin mixer exchange device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018119838A1 (en) | 2020-02-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2020035228A1 (en) | Apparatus for applying an at least two-component viscous material to workpieces | |
| DE2548626C3 (en) | Method and device for inserting an O-ring seal into the groove of a seat ring | |
| DE3613489A1 (en) | DEVICE FOR HANDLING PRE-FILLED SYRINGES | |
| EP4223471B1 (en) | System for applying a building material | |
| DE202007002792U1 (en) | Device for producing filler for joint surfaces of motor vehicle chasses comprises assembly element for placing and arranging container on support element | |
| EP4355498B1 (en) | Device and method for applying an at least two-component viscous material to workpieces | |
| DE202007016136U1 (en) | Device for producing a ready-to-use filler by mixing a binder and a hardener component | |
| DE102014017856A1 (en) | Quick-change nozzle, associated nozzle quick-change system and associated application system | |
| EP1578539A1 (en) | Dispensing device for fluid substances | |
| EP2868393A1 (en) | Discharge plunger, discharging device comprising the discharging plunger and method | |
| DE102006038897A1 (en) | Apparatus for generating a multicomponent mass | |
| DE102022103257A1 (en) | Integration of ejection needles with fluid ejection valve and method therefor | |
| EP2072114B1 (en) | Device for mixing bone cement | |
| EP2910325A1 (en) | Tool revolver | |
| EP3907005B1 (en) | Extraction cell for extracting a sample | |
| DE102012018242A1 (en) | Device for manufacturing screen cloths from plastic for vibrating screens, has retainers for individual elements that are aligned perpendicular to stop element, provided at other individual elements that are aligned parallel to stop element | |
| DE102007053528A1 (en) | Plain bearing with exchangeable sliding coating | |
| DE202007004570U1 (en) | Mixing device for mixing of binding component and curing component to obtain a pasty or liquid mixed product, comprises inlet openings, discharge openings, and a mixing chamber arranged between the openings | |
| EP3760376B1 (en) | Use of a rotation clamping device | |
| DE202009008413U1 (en) | Tool system for a forming press | |
| EP1682311B1 (en) | Grinding roller comprising a coating | |
| EP1667920B1 (en) | Feeding piston | |
| DE102017214718A1 (en) | filtering device | |
| EP4552798A1 (en) | Tensioning system and method | |
| EP0125461A1 (en) | Machine for the shear-proof joining of semi-profiles by way of plastic strips |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 19748714 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 19748714 Country of ref document: EP Kind code of ref document: A1 |