EP1199108B1 - Nozzle apparatus, coating device and coating method - Google Patents

Nozzle apparatus, coating device and coating method Download PDF

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Publication number
EP1199108B1
EP1199108B1 EP01123714A EP01123714A EP1199108B1 EP 1199108 B1 EP1199108 B1 EP 1199108B1 EP 01123714 A EP01123714 A EP 01123714A EP 01123714 A EP01123714 A EP 01123714A EP 1199108 B1 EP1199108 B1 EP 1199108B1
Authority
EP
European Patent Office
Prior art keywords
fluid
substrate
nozzle arrangement
applicator
channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01123714A
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German (de)
French (fr)
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EP1199108A3 (en
EP1199108A2 (en
Inventor
Franz-Josef Schnödewind
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SCHNOEDEWIND, FRANZ-JOSEF
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Schnodewind Franz-Josef
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Publication of EP1199108A2 publication Critical patent/EP1199108A2/en
Publication of EP1199108A3 publication Critical patent/EP1199108A3/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • 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
    • B05C5/0287—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 with no relative movement between the outlet and a moving work during the application
    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/02—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to separate articles
    • 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
    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/06—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length by rubbing contact, e.g. by brushes, by pads

Definitions

  • the present invention relates to a nozzle arrangement for dispensing and applying adhesive to a movable substrate, comprising a nozzle body and at least one fluid channel formed in the nozzle body, which is connectable to a fluid source and has an outlet opening through which the fluid can flow out and be dispensed.
  • the invention further relates to a device for applying fluid, in particular glue, to a substrate movable relative to the device with a supply channel connectable to a fluid source for supplying fluid, a nozzle arrangement which can be fed with fluid by means of the supply channel and having an outlet opening for discharging the fluid , and a valve assembly for intermittently interrupting the fluid flow having a valve body movable relative to a valve seat.
  • the invention further relates to a method for applying fluid to a substrate, in which the fluid is supplied from a fluid source to a nozzle arrangement which has a nozzle body and a fluid channel formed in the nozzle body, in which the fluid flows through the fluid channel up to an outlet opening.
  • nozzle arrangements and applicators are used for dispensing and applying fluids to different articles (substrates), for example, to apply adhesives, dyes or other flowable materials to automotive parts, packaging or furniture parts in the form of beads, dots or flat.
  • Application devices with such nozzle arrangements are regularly part of a complex application system comprising a container for the fluid, a delivery pump and a control device for controlling and / or regulating the individual components.
  • the substrate to which the fluid is to be applied is moved in many applications by means of a conveyor relative to the applicator, or the applicator is attached to a robot arm or the like and in this way movable relative to the substrate.
  • US 3,797,946 discloses a closure for adhesive adhesive adhesive tubes, consisting of a tube neck with removal opening, a cap and a coating member consisting of porous material.
  • the tube neck 2 is surrounded by the axially displaceable lapping member. When pushed out, the brush extends beyond the mouth of the tube neck.
  • the adhesive itself exits through the removal opening from the tube neck and is distributed with the end face of the applicator.
  • No. 4,035,090 discloses a storage container having application pads arranged on both end faces for applying a particularly liquid or semi-liquid adhesive from the storage container.
  • the application pillows are at the two container ends beyond the container longitudinal axis.
  • Each application cushion has at least one continuous, with the interior of the reservoir in communication channel, in which at least one of the two lids with an internal pin is inserted.
  • US 5,193,928 discloses an apparatus for applying a primer for adhesive bonds to a primer storage container and an applicator screwed to the storage container.
  • the applicator device has an actuating member which, by means of a relative movement relative to the storage container, converts the device into the ready-to-use state.
  • the applicator further includes an absorbent applicator member for applying the primer to a work surface.
  • the applicator is, for example, a felt plug.
  • a cylindrical cavity connects the removal opening of the container with the applicator member and thus forms the passage for the primer.
  • the object of the present invention is to provide a nozzle arrangement, an application device and a method for applying fluid, in particular adhesive, with which different application patterns can be produced on different substrates, and in where unwanted dripping can be prevented by intermittent application.
  • the invention solves this problem with a nozzle arrangement according to claim 1.
  • the invention also achieves the object with an applicator device of the type mentioned above having a nozzle arrangement according to the invention.
  • the invention also achieves the object by a method according to claim 19.
  • the advantages of the nozzle arrangement and application device and the method according to the invention are that a highly uniform distribution of the fluid to be applied, such as adhesive, is achieved by the fluid-permeable structure within the fluid channel, so that a uniform thickness is achieved within a application pattern produced on the substrate becomes.
  • the fluid to be applied is evenly distributed transversely in the flow direction of the fluid. Wall adhesion effects of conventional fluid channels are reduced, so that sufficient fluid is present in the wall-side edge region of the fluid channel, so that even in this respect a uniform application is ensured.
  • dripping can be largely prevented by the fluid within the structure having the cavities being held to a certain extent when the application valve is closed so that no drops drip down from the nozzle arrangement onto the substrate.
  • a further advantage of the invention is that the fluid flow can be released only very briefly by means of an application valve and thus only a relatively small amount of fluid flows through the fluid channel and the structure according to the invention, so that a quantity of fluid accumulates in the region of the surface of the fluid-permeable structure. which can be dispensed onto the substrate to be coated by bringing the nozzle assembly into contact with the substrate and thereby transferring the amount of fluid adhering to the structure. Thus, if necessary, very small amounts can be applied evenly.
  • the fluid-permeable structure extends to the outlet opening of the fluid channel.
  • the amount of fluid adhering to the fluid-permeable structure can be transferred to the substrate by contact.
  • the fluid-permeable structure "aligns" with the outlet opening.
  • a manufacturing technical advantage and a simple cleaning of the fluid-permeable structure can be achieved in that the fluid-permeable structure is formed on a separate part which can be inserted into the fluid channel of the nozzle body.
  • the insertable part can be used in a simple manner in the fluid channel and fixed in this.
  • the separate part consists of a sintered material, a sintered metal, foam, a woven material, a metal mesh or the like.
  • a sintered material has a high number of intercommunicating cavities formed between rigid structures.
  • a sintered metal can be produced inexpensively and is resistant to hot adhesives (hot melt) or the like.
  • the aforementioned structures allow a uniform fluid distribution and adhesion to the surface while allowing a relatively large amount of fluid to be transferred by contact with the substrate. As fluid is stored in the cavities near the surface and then transferred to the substrate surface.
  • the fluid-permeable structure extends beyond the outlet opening and protrudes from the nozzle body.
  • the fluid can also adhere to and emerge from lateral surfaces of the structure used, so that boundary walls of the recess can be coated by inserting the fluid-permeable structure into recesses formed in objects.
  • boundary walls of the recess can be coated by inserting the fluid-permeable structure into recesses formed in objects.
  • holes in workpieces evenly coated with adhesive or other fluids it is possible to proceed in such a way that the portion of the fluid-permeable structure protruding from the nozzle body is first introduced into a recess of the object and then the fluid flow is started by means of an application valve so that adhesive exits from the outer pores of the structure and onto the wall of a recess passes.
  • the separate part has a contact surface, which can be brought into contact with a substrate to be coated with fluid.
  • a contact surface By means of such contact surfaces, defined application images can be produced which have a sharp edge. It is preferred that the contact surface is substantially circular, circular, square, rectangular or oval or designed in other shapes.
  • a further preferred embodiment of the nozzle arrangement according to the invention is characterized in that it is fastened to an application head of a fluid application device and that the application head has an intermittently operable order valve for selectively interrupting or releasing the fluid flow in the fluid channel of the nozzle arrangement.
  • a device of the type mentioned is designed such that the nozzle assembly or the entire device is attached to a lifting device having a movable carrier for receiving the device or the nozzle assembly, wherein the carrier is so movable and driven in that the application head or the application device is moved back and forth relative to a substrate to be coated with fluid in such a way that the nozzle arrangement on the one hand comes into and out of contact with a substrate to be coated and movable relative to the device, and on the other hand during the contact is moved with the substrate together with this in the direction of relative movement between the substrate and applicator.
  • the advantages of this inventive solution are that in an industrial application of, for example, adhesive to substrates, which are moved by means of a conveyor to the nozzle assembly of the device, adhesive patterns are applied by the nozzle assembly is brought into contact with the substrate surface, during contact with transported at substantially the same speed in the direction of the substrate, so that there is no relative velocity between the nozzle assembly and substrate during the contact and thereby no damage to the substrate or grinding marks arise that lead to a non-uniform application pattern. Furthermore, the lifting device causes the nozzle assembly to be subsequently moved away from the substrate, so that the nozzle arrangement comes out of contact with the substrate surface. Subsequently, the Order valve are opened, so that the outer surface of the nozzle assembly, in particular the structure according to the invention having voids is wetted.
  • the lifting device ensures that the nozzle arrangement and in particular the adhering fluid quantity comes into contact with the substrate surface. This process can be repeated as often as required so that the passing substrate or a multiplicity of packaging parts, containers, workpieces or the like can be coated.
  • the lifting device has two spaced and synchronously rotatable rotary body and an eccentrically articulated on both rotary bodies connecting element and the carrier is coupled to the connecting element, so that the reciprocating motion of the carrier and thus the applicator and simultaneously the synchronous movement is achieved during the contact of the nozzle assembly with the substrate in a structurally simple manner.
  • the carrier is thereby moved together with the applicator device on a circular path.
  • a further embodiment provides that the rotary bodies are driven synchronously by means of a chain or a toothed belt and the connecting element is designed as a rod which is fastened by means of two rotary joints to the rotary bodies.
  • the lifting device is driven such that during the contact of the nozzle assembly with the substrate to be coated, the carrier is moved at substantially the same speed and direction as the substrate, so that a precise application image is generated.
  • a driving motor driving the rotary bodies is controlled in response to a signal provided by a conveyor for moving the substrate.
  • the drive motor may be, for example, a servomotor, which is driven at such a speed that during the contact Nozzle assembly and the substrate are moved in the same direction at substantially the same speed.
  • a sensor determines the speed of the relative movement between the substrate and a stationary point and provides the signal which is supplied by means of a signal line to the drive motor of the lifting device.
  • the sensor is a tachogenerator or incremental encoder coupled to a roller of a conveyor or drive shaft of the drive motor of the conveyor.
  • the conveyor for moving the substrate comprises an endless conveyor belt and at least two rollers for receiving the conveyor belt, of which at least one roller is driven by a drive motor and one of the rotary bodies is mechanically coupled to the drive motor of the conveyor by means of a drive chain or a toothed belt ,
  • the control part 2 has a metallic housing 6, which is screwed to a base body 10.
  • a fixed to the base 10 connecting piece 12 is connected by means of a heatable hose with an adhesive container as a fluid source.
  • a feed channel 14 formed in the base body 10 fluid can flow into a bore 18 formed in the housing 6 through an oblique bore 16 formed in the housing 6 of the control part 2, which communicates with the feed channel 14.
  • the valve arrangement 8 has a valve body 20 in the form of a rod or needle, which is axially related to a central axis 22 of the control part 2 and the nozzle assembly 4 is movable so that the lower surface 24 of the valve body 20 comes into or out of contact with a valve seat 26 which is formed on a bolted to the housing 6 part 28.
  • the valve body 20 is coupled to a piston 32 which is movable in a cylinder 30 and which can be impelled by compressed air which can be introduced below the piston 32 into the cylinder space 30 with a force which moves the valve body 20 upwards so that the valve arrangement 8 comes into its open position , so that adhesive from the channel 18 - down - through a bore 32 in the part 28 can flow into a fluid channel 34 which is formed in a nozzle body 34 of the nozzle assembly 4.
  • the compressed air is introduced conventionally through a helical bore 36 and a bore 38 in the cylinder 30.
  • an unillustrated electromagnetically actuated solenoid valve is opened.
  • a mounting clamp 40 serves to attach the entire applicator 1 to a lifting device, as described below.
  • the nozzle arrangement 4 is screwed to the control part 2.
  • an internal thread 42 is formed on the nozzle body 34 (FIG. 2), which cooperates with an external thread 44 formed on the part 28.
  • the fluid channel 34 of the nozzle arrangement 4 continues in the direction of flow through a plurality of holes 46 distributed uniformly around the circumference and inclined to the central axis 22 and through an annular channel 48 formed in the nozzle body 34.
  • the fluid channel 34 opens into an annular outlet opening 50 in the exemplary embodiment the fluid flowing through is discharged.
  • a structure 52 In the lower portion of the fluid channel 34 formed by the annular channel 48, a structure 52 according to the invention is formed or arranged, which has a plurality of at least partially mutually communicating cavities 54, which are shown only schematically.
  • the structure 52 is fluid-permeable so that fluid flows through the communicating cavities 54 through the bores 46 and the annular channel 48 and exits through the outlet opening 50.
  • the structure 52 is a separate, sintered metal part. Sintered metals are known to be made by metal particles which are fused together with surface portions, so that a rigid structure is formed with a plurality of communicating cavities. The sintered part is pressed in the embodiment in the valve body 34.
  • the structure 52 could be formed of a foam, a woven material, a metal mesh, a mesh of metal rods, or the like.
  • the outlet opening 50 and the lower contact surface of the sintered structure 52 coincide in the embodiment illustrated in FIGS.
  • the entire nozzle assembly 4 could be formed as an integral part, wherein the fluid-permeable structure in the fluid channel can be produced by suitable mechanical or thermal workpiece processing methods, for example by punching.
  • FIG. 4 shows two alternative embodiments of a nozzle arrangement 4 according to the invention.
  • the structure 54 comprising the cavities 54 extends beyond the outlet opening 50 of the fluid channel 34 and thus protrudes from the nozzle body 35. This has the effect of expelling fluid from the protruding portion of the structure 52 from the side surfaces 56 and from a bottom surface 58.
  • a further exemplary embodiment of the nozzle arrangement 4 is schematically illustrated, in which the structure 52 likewise extends beyond the outlet opening 50, but is bordered on the inside and on the underside by a projection 60 of the nozzle body 35, so that fluid only emerges an outer annular surface 62 formed on the structure 52 can escape.
  • an annular surface can be selectively coated, for example with adhesive.
  • the structure 52 is also removablebilet in the embodiment shown in Figure 4 as a sintered part.
  • the lower portion 64 of the lug 60 could be angesch bulk after insertion of the sintered part in the annular channel 48 after assembly.
  • FIG. 6 shows a further alternative embodiment of a nozzle arrangement 4 according to the invention, in which, unlike the previously described embodiments, a cylinder bore 66 is part of the fluid channel 34 instead of an annular channel 48 and into this a closed cylindrical structure 52 having a plurality of communicating cavities 54 schematically indicated, is inserted so that the lower contact surface 68, which can be brought into contact with a substrate to be coated, and the outlet opening 50 of the fluid channel 34 coincide.
  • FIGS. 7 and 8 schematically illustrate an application device 1 according to the invention and a nozzle arrangement according to the invention according to FIGS. 1 to 6, a lifting device 70 according to the invention, on which the application device 1 is mounted, and a conveying device 72 for moving substrates to be coated with fluid, here packaging 74, which are designed as boxes.
  • the conveyor 72 is slid as a conventional conveyor belt with two (or possibly more) cylindrical rollers 76, 78 and one of these tensioned and guided endless conveyor belt 80.
  • On the upper strand are the packages 74 and linear in the direction of arrow 82 with constant Speed moves.
  • the right roller 74 is driven in a manner not shown by means of an electric motor.
  • the rollers 78 are mounted on a frame structure.
  • a tachogenerator 84 receives as a sensor from the conveyor 72, the speed of the conveyor belt 80 and provides a signal which is transmitted through a line 86 to a servo motor 88 of the lifting device 70.
  • the lifting device 70 causes the application device 1, together with the nozzle assembly 4 according to the invention (not shown in detail in FIGS. 7 and 8) to be rotated along a circular path 90 in the direction of the arrow 92, thereby performing a reciprocating motion which brings the bottom of the nozzle assembly 4 and the lower contact surface of the structure 52 (see Figures 2 to 6) into and out of contact with a top 94 of the packages 74.
  • Superimposed is a reciprocating motion in and against the direction the movement of the packaging 74 (arrow 82), so that a total of a movement on a circular path 90 is formed.
  • the lifting device 70 has two rotating bodies 98, 100 mounted on supported shafts 96, on which by means of rotary joints 102, 104 a connecting element 106 in the form of a rod is articulated eccentrically, which is arranged horizontally.
  • the hinges 102, 104 may be formed by bolts or ball bearings or the like.
  • a carrier 108 is mounted to the connecting member 106 and carries the complete applicator 1 and the associated nozzle assembly 4.
  • the shafts 96 and thus the rotary bodies 98, 100 are coupled together by means of wheels 110, 112 and a toothed belt 114 or a chain, so that they be rotated synchronously.
  • the result is a kind of forced control, so that the application device 1 performs the movement described above on a circular path 90.
  • the wheel 116 of the lifting device 70 is coupled by means of a toothed belt 124 with a wheel 126 and is driven by the latter.
  • the wheel 126 is in turn mounted on the same shaft 128 as the roller 78, so that a mechanical coupling between the drive motor, not shown, the conveyor 72 and the lifting device is formed.
  • the method of applying fluid to the tops 94 of the packages 74 is performed as follows:
  • the application valve 8 of the applicator 1 is opened for a short time so that fluid flows through the fluid channel 34 and an amount of adhesive accumulates on the lower contact surface of the structure 52, but it adheres and does not drip. Then the order valve 8 is closed again. At the same time, the lifting device 70 moves the application device 1 along the circular path 90 and the conveying device 72 moves a package 74 in the direction of the application device 1.
  • the amount of adhesive adhered to the bottom of the structure 50 is transferred to the top 120 in a defined application image and remains adhered thereto.
  • the nozzle assembly 4 and the packages 74 are moved in the direction of the arrow 82 at substantially the same speed. The relative velocity during contact is essentially zero.

Abstract

The jet applicator assembly, especially for coating a substrate with an adhesive, has a jet body (35) with at least one fluid channel (34) between the fluid supply and the applicator opening (50). The fluid can flow from the supply, through the channel, and out through the jet opening. The fluid channel has a number of interlinked hollow zones in a structure (52) which is fluid permeable, and extends as far as the channel outlet opening. The permeable structure is a sintered component, inserted separately into the fluid channel opening, of a sintered metal, metal foam, woven metal, and the like.

Description

Die vorliegende Erfindung betrifft eine Düsenanordnung zum Abgeben und Auftragen von Klebstoff auf ein bewegbares Substrat, mit einem Düsenkörper und mindestens einem in dem Düsenkörper ausgebildeten Fluidkanal, der mit einer Fluidquelle verbindbar ist und eine Austrittsöffnung aufweist, durch welche das Fluid ausströmen und abgegeben werden kann.The present invention relates to a nozzle arrangement for dispensing and applying adhesive to a movable substrate, comprising a nozzle body and at least one fluid channel formed in the nozzle body, which is connectable to a fluid source and has an outlet opening through which the fluid can flow out and be dispensed.

Die Erfindung betrifft ferner eine Vorrichtung zum Auftragen von Fluid, insbesondere von Klebstoff, auf ein relativ zu der Vorrichtung bewegbares Substrat mit einem mit einer Fluidquelle verbindbaren Zuführkanal zum Zuführen von Fluid, einer mittels des Zuführkanals mit Fluid speisbaren Düsenanordnung mit einer Austrittsöffnung zum Abgeben des Fluids, und mit einer Ventilanordnung zum intermittierenden Unterbrechen bzw. Freigeben des Fluidflusses, welche einen relativ zu einem Ventilsitz bewegbaren Ventilkörper aufweist.The invention further relates to a device for applying fluid, in particular glue, to a substrate movable relative to the device with a supply channel connectable to a fluid source for supplying fluid, a nozzle arrangement which can be fed with fluid by means of the supply channel and having an outlet opening for discharging the fluid , and a valve assembly for intermittently interrupting the fluid flow having a valve body movable relative to a valve seat.

Die Erfindung betrifft ferner ein Verfahren zum Auftragen von Fluid auf ein Substrat, bei dem das Fluid aus einer Fluidquelle einer Düsenanordnung zugeleitet wird, welche einen Düsenkörper und einen in dem Düsenkörper ausgebildeten Fluidkanal aufweist, bei dem das Fluid den Fluidkanal bis zu einer Austrittsöffnung durchströmt.The invention further relates to a method for applying fluid to a substrate, in which the fluid is supplied from a fluid source to a nozzle arrangement which has a nozzle body and a fluid channel formed in the nozzle body, in which the fluid flows through the fluid channel up to an outlet opening.

In vielen industriellen Anwendungen werden derartige Düsenanordnungen und Auftragsvorrichtungen zum Abgeben und Auftragen von Fluiden auf unterschiedliche Gegenstände (Substrate) eingesetzt, beispielsweise um Klebstoffe, Farbstoffe oder sonstige fließfähige Materialien auf Automobilteile, Verpackungen oder Möbelteile in Form von Raupen, Punkten oder flächig aufzutragen. Auftragsvorrichtungen mit derartigen Düsenanordnungen sind regelmäßig Teil eines komplexen Auftragssystems, dass einen Behälter für das Fluid, eine Förderpumpe und eine Steuerungseinrichtung zum Steuern und/oder Regeln der einzelnen Komponenten umfasst. Das Substrat, auf welches das Fluid aufgetragen werden soll, wird bei vielen Anwendungen mit Hilfe einer Fördereinrichtung relativ zu der Auftragsvorrichtung bewegt, oder die Auftragsvorrichtung ist an einem Roboterarm oder dergleichen befestigt und auf diese Weise relativ zu dem Substrat bewegbar.In many industrial applications such nozzle arrangements and applicators are used for dispensing and applying fluids to different articles (substrates), for example, to apply adhesives, dyes or other flowable materials to automotive parts, packaging or furniture parts in the form of beads, dots or flat. Application devices with such nozzle arrangements are regularly part of a complex application system comprising a container for the fluid, a delivery pump and a control device for controlling and / or regulating the individual components. The substrate to which the fluid is to be applied is moved in many applications by means of a conveyor relative to the applicator, or the applicator is attached to a robot arm or the like and in this way movable relative to the substrate.

In Abhängigkeit von dem konkreten Anwendungsfall müssen unterschiedliche Auftragsbilder auf den zu beschichtenden Substrat erzeugt werden und müssen selbstverständlich unterschiedliche fließfähige Materialien aufgetragen werden. Beim Auftragen von Klebstoffen, wie Heißschmelzklebstoff oder Kaltleim auf zu verklebende Werkstücke oder Verpackungsmaterial sind häufig definierte Auftragsmuster (Patterns) mit einer bestimmten Auftragsdicke zu erzeugen. Hierzu werden häufig sogenannte Schlitzdüsen eingesetzt, um flächige Auftragsmuster zu erzeugen, oder es werden Klebstoffraupen mit einer kreisförmige Austrittsöffnung aufweisenden Düsenanordnungen erzeugt. In beiden Fällen ist ein Nachtropfen von Klebstoff aus der Austrittsöffnung nach dem Schließen eines Auftragsventils zu vermeiden, so dass der Klebstoff nicht in unerwünschter Weise auf nicht zu beschichtende Teile der Verpackung gelangt.Depending on the specific application, different application images must be produced on the substrate to be coated and, of course, different flowable materials must be applied. When applying adhesives, such as hot melt adhesive or cold glue, to workpieces or packaging material to be bonded, frequently defined pattern patterns (patterns) with a specific application thickness are to be produced. For this purpose, so-called slot nozzles are frequently used to produce areal patterns, or adhesive beads are produced with nozzle arrangements having a circular outlet opening. In both cases, a dripping of adhesive from the outlet after closing an application valve is to be avoided so that the adhesive does not undesirably end up on parts of the package which are not to be coated.

Zwar können mit den bekannten Düsenanordnungen und Auftragsvorrichtungen brauchbare Auftragsbilder bereitgestellt werden, jedoch besteht generell der Bedarf, klar abgegrenzte Auftragsbilder und Auftragsmuster mit scharfen Rändern zu erzeugen und ein Nachtropfen weiter zu reduzieren.While useful pattern images can be provided with the prior art nozzle arrays and applicators, there is a general need to create clear demarcated pattern images and pattern patterns with sharp edges and further reduce dripping.

Aus dem US 5,122,158 ist ein Verfahren zum Reinigen von Kleidungsstücken bekannt, welches Verfahren eine Auftragseinrichtung für eine Reinigungsflüssigkeit verwendet, die Auftragseinrichtung einen Behälter für eine Reinigungsflüssigkeit und einen mit dem Behälter über Kanäle verbundenen Auftragsabschnitt aufweist, wobei letzter einen aus Plastik hergestellten porösen Körper aufweist, durch den die Reinigungsflüssigkeit hindurchtreten und von dem die Reinigungsflüssigkeit an das zu reinigende Kleidungsstück angegeben werden kann.From US 5,122,158 there is known a method of cleaning garments which method employs a cleaning liquid applicator, the applicator comprises a container for a cleaning liquid and an applicator portion connected to the container via channels, the latter having a porous body made of plastic, through which the cleaning liquid pass and from which the cleaning liquid can be indicated to the garment to be cleaned.

Die US 3,797,946 offenbart einen Verschluss für Klebstofftuben für Lösungsmittel-Klebstoff, bestehend aus einem Tubenhals mit Entnahmeöffnung, einer Verschlusskappe sowie einem aus porösem Material bestehenden Aufstreichorgan. Der Tubenhals 2 wird von dem axial verschiebbaren Aufstreichorgan umgeben. Im ausgeschobenen Zustand überragt das Aufstreichorgan die Mündung des Tubenhalses. Der Klebstoff selbst tritt durch die Entnahmeöffnung aus dem Tubenhals aus und wird mit der Stirnseite des Aufstreichorgans verteilt.US 3,797,946 discloses a closure for adhesive adhesive adhesive tubes, consisting of a tube neck with removal opening, a cap and a coating member consisting of porous material. The tube neck 2 is surrounded by the axially displaceable lapping member. When pushed out, the brush extends beyond the mouth of the tube neck. The adhesive itself exits through the removal opening from the tube neck and is distributed with the end face of the applicator.

Die US 4,035,090 offenbart einen Vorratsbehälter mit an beiden Stirnseiten angeordneten Auftragskissen zum Auftragen eines insbesondere flüssigen oder halbflüssigen Klebstoffes aus dem Vorratsbehälter. Die Auftragskissen stehen an den beiden Behälterenden über die Behälterlängsachse hinaus. Jedes Auftragskissen weist mindestens einen durchgehenden, mit dem Innenraum des Vorratsbehälters in Verbindung stehenden Kanal auf, in den wenigstens einer der beiden Deckel mit einem innenliegenden Zapfen einführbar ist. Durch Einführen des Zapfens kann auf besonders einfache Art und Weise die Tränkung des gegenüberliegenden Auftragskissens mit Klebstoff erfolgen, indem der Zapfen nach Art eines Kolbens wirkt.No. 4,035,090 discloses a storage container having application pads arranged on both end faces for applying a particularly liquid or semi-liquid adhesive from the storage container. The application pillows are at the two container ends beyond the container longitudinal axis. Each application cushion has at least one continuous, with the interior of the reservoir in communication channel, in which at least one of the two lids with an internal pin is inserted. By inserting the pin can be done in a particularly simple manner, the impregnation of the opposite application pad with adhesive by the pin acts like a piston.

Die US 5,193,928 offenbart ein Gerät zum Auftragen eines Grundiermittels für Klebeverbindungen mit einem Lagerbehälter für das Grundiermittel und einer Auftragsvorrichtung, die an den Lagerbehälter angeschraubt ist. Die Auftragsvorrichtung weist ein Betätigungsorgan auf, das durch eine Relativbewegung gegenüber dem Lagerbehälter das Gerät in den gebrauchsfertigen Zustand überführt. Die Auftragsvorrichtung weist weiter ein saugfähiges Auftragsorgan zum Auftragen des Grundiermittels auf eine Arbeitsfläche auf. Das Auftragsorgan ist beispielsweise ein Filzpfropfen. Ein zylindrischer Hohlraum verbindet die Entnahmeöffnung des Behälters mit dem Auftragsorgan und bildet so den Durchlass für das Grundiermittel.US 5,193,928 discloses an apparatus for applying a primer for adhesive bonds to a primer storage container and an applicator screwed to the storage container. The applicator device has an actuating member which, by means of a relative movement relative to the storage container, converts the device into the ready-to-use state. The applicator further includes an absorbent applicator member for applying the primer to a work surface. The applicator is, for example, a felt plug. A cylindrical cavity connects the removal opening of the container with the applicator member and thus forms the passage for the primer.

Aufgabe der vorliegenden Erfindung ist es, eine Düsenanordnung, eine Auftragsvorrichtung und ein Verfahren zum Auftragen von Fluid, insbesondere Klebstoff anzugeben, mit denen unterschiedliche Auftragsmuster auf unterschiedlichen Substraten erzeugt werden können, und bei
denen ein unerwünschtes Nachtropfen bei intermittierendem Auftrag verhindert werden kann.The object of the present invention is to provide a nozzle arrangement, an application device and a method for applying fluid, in particular adhesive, with which different application patterns can be produced on different substrates, and in
where unwanted dripping can be prevented by intermittent application.

Die Erfindung löst diese Aufgabe mit einer Düsenordnung nach Anspruch 1.The invention solves this problem with a nozzle arrangement according to claim 1.

Die Erfindung löst die Aufgabe ferner bei einer Auftragsvorrichtung einer eingangs genannten Art mit einer erfindungsgemäßen Düsenanordnung.The invention also achieves the object with an applicator device of the type mentioned above having a nozzle arrangement according to the invention.

Die Erfindung löst die Aufgabe ferner durch ein Verfahren nach Anspruch 19.The invention also achieves the object by a method according to claim 19.

Die Vorteile der Düsenanordnung und Auftragsvorrichtung und dem Verfahren gemäß der Erfindung bestehen darin, dass durch die fluiddurchlässige Struktur innerhalb des Fluidkanals eine sehr gleichmäßige Verteilung des aufzutragenden Fluids, wie Klebstoff, erreicht wird, so dass innerhalb eines auf dem Substrat erzeugten Auftragsmusters eine gleichmäßige Dicke erzielt wird. Innerhalb der eine Vielzahl von miteinander kommunizierenden Hohlräumen aufweisenden Struktur. verteilt sich das aufzutragene Fluid gleichmäßig auch quer in Flussrichtung des Fluids. Wandhaftungseffekte herkömmlicher Fluidkanäle werden reduziert, sodasss im wandseitigen Randbereich des Fluidkanals ausreichend Fluid vorhanden ist, so dass auch insoweit ein gleichmäßiger Auftrag gewährleistet ist. Ferner kann ein Nachtropfen dadurch weitgehend verhindert werden, dass das Fluid innerhalb der die Hohlräume aufweisenden Struktur bei geschlossenem Auftragsventil gewissermaßen gehalten wird, so dass keine Tropfen von der Düsenanordnung auf das Substrat heruntertropfen.The advantages of the nozzle arrangement and application device and the method according to the invention are that a highly uniform distribution of the fluid to be applied, such as adhesive, is achieved by the fluid-permeable structure within the fluid channel, so that a uniform thickness is achieved within a application pattern produced on the substrate becomes. Within the structure having a plurality of communicating cavities. the fluid to be applied is evenly distributed transversely in the flow direction of the fluid. Wall adhesion effects of conventional fluid channels are reduced, so that sufficient fluid is present in the wall-side edge region of the fluid channel, so that even in this respect a uniform application is ensured. Furthermore, dripping can be largely prevented by the fluid within the structure having the cavities being held to a certain extent when the application valve is closed so that no drops drip down from the nozzle arrangement onto the substrate.

Ein weiterer Vorteil der Erfindung besteht darin, dass mittels eines Auftragsventils der Fluidfluss nur sehr kurz freigegeben werden kann und somit nur eine relativ geringe Fluidmenge durch den Fluidkanal und die erfindungsgemäße Struktur hindurchströmt, so dass sich im Bereich der Oberfläche der fluiddurchlässigen Struktur eine Fluidmenge ansammelt, die dadurch auf das zu beschichtende Substrat abgegeben werden kann, dass die Düsenanordnung in Kontakt mit dem Substrat gebracht wird und dadurch die an der Struktur anhaftende Fluidmenge transferiert wird. So können bei Bedarf sehr geringe Mengen gleichmässig aufgebracht werden.A further advantage of the invention is that the fluid flow can be released only very briefly by means of an application valve and thus only a relatively small amount of fluid flows through the fluid channel and the structure according to the invention, so that a quantity of fluid accumulates in the region of the surface of the fluid-permeable structure. which can be dispensed onto the substrate to be coated by bringing the nozzle assembly into contact with the substrate and thereby transferring the amount of fluid adhering to the structure. Thus, if necessary, very small amounts can be applied evenly.

Gemäß einer bevorzugten Ausführungsform der Erfindung ist vorgesehen, dass die fluiddurchlässige Struktur sich bis zur Austrittsöffnung des Fluidkanals erstreckt. Hierbei kann die bei an der fluiddurchlässigen Struktur anhaftende Fluidmenge durch Kontakt auf das Substrat übertragen werden. In anderen Worten "fluchtet" die fluiddurchlässige Struktur mit der Austrittsöffnung.According to a preferred embodiment of the invention it is provided that the fluid-permeable structure extends to the outlet opening of the fluid channel. In this case, the amount of fluid adhering to the fluid-permeable structure can be transferred to the substrate by contact. In other words, the fluid-permeable structure "aligns" with the outlet opening.

Ein herstellungstechnischer Vorteil und eine einfache Reinigung der fluiddurchlässigen Struktur lässt sich dadurch erzielen, dass die fluiddurchlässige Struktur an einem separaten, in den Fluidkanal des Düsenkörpers einsetzbaren Teil ausgebildet ist. Das einsetzbare Teil kann auf einfache Weise in dem Fluidkanal eingesetzt und in diesem fixiert werden.A manufacturing technical advantage and a simple cleaning of the fluid-permeable structure can be achieved in that the fluid-permeable structure is formed on a separate part which can be inserted into the fluid channel of the nozzle body. The insertable part can be used in a simple manner in the fluid channel and fixed in this.

Besonders bevorzugt ist es, dass das separate Teil aus einem Sintermaterial, einem Sintermetall, Schaumstoff, einem gewebten Material, einem Metallgewebe oder dgl. besteht. Insbesondere ein gesintertes Material weist ein hohe Anzahl von miteinander kommunizierenden Hohlräumen, die zwischen starren Strukturen ausgebildet sind. Ein Sintermetal lässt sich darüber hinaus kostengünstig herstellen und ist beständig gegenüber heissen Klebstoffen (hot melt) o. dgl.. Die vorgenannten Strukturen erlauben eine gleichmäßige Fluidverteilung und Anhaftung an der Oberfläche und erlauben gleichzeitig eine Übertragung einer relativ großen Fluidmenge durch Kontakt mit dem Substrat, da in den Oberflächen nahen Hohlräumen Fluid gespeichert und dann auf die Substratoberfläche übertragen wird.It is particularly preferred that the separate part consists of a sintered material, a sintered metal, foam, a woven material, a metal mesh or the like. In particular, a sintered material has a high number of intercommunicating cavities formed between rigid structures. In addition, a sintered metal can be produced inexpensively and is resistant to hot adhesives (hot melt) or the like. The aforementioned structures allow a uniform fluid distribution and adhesion to the surface while allowing a relatively large amount of fluid to be transferred by contact with the substrate. As fluid is stored in the cavities near the surface and then transferred to the substrate surface.

Bei einer alternativen Ausführungsform wird vorgeschlagen, dass sich die fluiddurchlässige Struktur über die Austrittsöffnung hinaus erstreckt und vom dem Düsenkörper absteht. Auf diese Weise lässt sich erreichen, dass das Fluid auch an seitlichen Oberflächen der eingesetzten Struktur anhaften und austreten kann, so dass durch Einführen der fluiddurchlässigen Struktur in in Gegenständen ausgebildete Ausnehmungen Begrenzungswände der Ausnehmung beschichtet werden können. Auf diese Weise lassen sich beispielsweise Bohrungen in Werkstücken gleichmäßig mit Klebstoff oder anderen Fluiden beschichten. Hierbei kann so vorgegangen werden, dass zunächst der von dem Düsenkörper anstehende Abschnitt der fluiddurchlässigen Struktur in eine Ausnehmung des Gegenstandes eingeführt wird und anschließend der Fluidstrom mittels eines Auftragsventils gestartet wird, so dass aus dem äußeren Poren der Struktur Klebstoff austritt und auf die Wandung einer Ausnehmung übergeht.In an alternative embodiment, it is proposed that the fluid-permeable structure extends beyond the outlet opening and protrudes from the nozzle body. In this way, it can be achieved that the fluid can also adhere to and emerge from lateral surfaces of the structure used, so that boundary walls of the recess can be coated by inserting the fluid-permeable structure into recesses formed in objects. In this way, for example holes in workpieces evenly coated with adhesive or other fluids. In this case, it is possible to proceed in such a way that the portion of the fluid-permeable structure protruding from the nozzle body is first introduced into a recess of the object and then the fluid flow is started by means of an application valve so that adhesive exits from the outer pores of the structure and onto the wall of a recess passes.

Vorzugsweise weist das separate Teil eine Kontaktfläche auf, die mit einem mit Fluid zu beschichtenden Substrat in Kontakt bringbar ist. Mittels derartiger Kontaktflächen lassen sich definierte Auftragsbilder erzeugen, die einen scharfen Rand aufweisen. Bevorzugt ist es, dass die Kontaktfläche im Wesentlichen kreisförmig, kreisringförmig, quadratisch, rechteckig oder oval oder in anderen Formen gestaltet ist.Preferably, the separate part has a contact surface, which can be brought into contact with a substrate to be coated with fluid. By means of such contact surfaces, defined application images can be produced which have a sharp edge. It is preferred that the contact surface is substantially circular, circular, square, rectangular or oval or designed in other shapes.

Eine weitere bevorzugte Ausführungsform der erfindungsgemäßen Düsenanordnung zeichnet sich dadurch aus, dass sie an einen Auftragskopf einer Fluidauftragsvorrichtung befestigt ist und dass der Auftragskopf ein intermitterend betätigbares Auftragsventil zum wahlweisen Unterbrechen bzw. Freigeben des Fluidflusses in dem Fluidkanal der Düsenanordnung aufweist.A further preferred embodiment of the nozzle arrangement according to the invention is characterized in that it is fastened to an application head of a fluid application device and that the application head has an intermittently operable order valve for selectively interrupting or releasing the fluid flow in the fluid channel of the nozzle arrangement.

Gemäß eines weiteren Aspekts der Erfindung wird eine Vorrichtung der eingangs genannten Art derart gestaltet, dass die Düsenanordnung oder die gesamte Vorrichtung an einer Hubvorrichtung befestigt ist, die einen bewegbaren Träger zum Aufnehmen der Vorrichtung oder der Düsenanordnung aufweist, wobei der Träger derart bewegbar und antreibbar ist, dass der Auftragskopf bzw. die Auftragsvorrichtung relativ zu einem mit Fluid zu beschichtenden Substrat derart hin- und her bewegt wird, dass die Düsenanordnung einerseits in und ausser Kontakt mit einem zu beschichtenden und relativ zu der Vorrichtung bewegbaren Substrat kommt, und andererseits während des Kontaktes mit dem Substrat zusammen mit diesem in Richtung der Relativbewegung zwischen Substrat und Auftragsvorrichtung bewegt wird.According to a further aspect of the invention, a device of the type mentioned is designed such that the nozzle assembly or the entire device is attached to a lifting device having a movable carrier for receiving the device or the nozzle assembly, wherein the carrier is so movable and driven in that the application head or the application device is moved back and forth relative to a substrate to be coated with fluid in such a way that the nozzle arrangement on the one hand comes into and out of contact with a substrate to be coated and movable relative to the device, and on the other hand during the contact is moved with the substrate together with this in the direction of relative movement between the substrate and applicator.

Die Vorteile dieser erfindungsgemäßen Lösung liegen darin, dass bei einer industriellen Aufbringung von beispielsweise Klebstoff auf Substrate, die mittels einer Fördervorrichtung an der Düsenanordnung der Vorrichtung vorbeibewegt werden, Klebstoffmuster aufgebracht werden, indem die Düsenanordnung in Kontakt mit der Substratoberfläche gebracht wird, während des Kontaktes mit im wesentlichen der gleichen Geschwindigkeit in Richtung des Substrats transportiert wird, so dass während des Kontaktes keine Relativgeschwindigkeit zwischen Düsenanordnung und Substrat besteht und dadurch keine Beschädigung des Substrates oder Schleifspuren entstehen, die zu einem ungleichmäßigen Auftragsbild führen. Ferner bewirkt die Hubvorrichtung, dass die Düsenanordnung anschließend von dem Substrat fortbewegt wird, so dass die Düsenanordnung ausser Kontakt von der Substratoberfläche gelangt. Anschließend kann erneut das Auftragsventil geöffnet werden, so dass die äußere Oberfläche der Düsenanordnung, insbesondere der erfindungsgemäße Hohlräume aufweisenden Struktur benetzt wird. Im Anschluss hieran sorgt die Hubvorrichtung dafür, dass die Düsenanordnung und insbesondere die anhaftende Fluidmenge mit der Substratoberfläche in Kontakt kommt. Dieser Vorgang kann beliebig oft wiederholt werden, so dass vorbeilaufende Substrat oder eine Vielzahl von Verpackungsteilen, Behältnissen, Werkstücken oder dergleichen beschichtet werden können.The advantages of this inventive solution are that in an industrial application of, for example, adhesive to substrates, which are moved by means of a conveyor to the nozzle assembly of the device, adhesive patterns are applied by the nozzle assembly is brought into contact with the substrate surface, during contact with transported at substantially the same speed in the direction of the substrate, so that there is no relative velocity between the nozzle assembly and substrate during the contact and thereby no damage to the substrate or grinding marks arise that lead to a non-uniform application pattern. Furthermore, the lifting device causes the nozzle assembly to be subsequently moved away from the substrate, so that the nozzle arrangement comes out of contact with the substrate surface. Subsequently, the Order valve are opened, so that the outer surface of the nozzle assembly, in particular the structure according to the invention having voids is wetted. Following this, the lifting device ensures that the nozzle arrangement and in particular the adhering fluid quantity comes into contact with the substrate surface. This process can be repeated as often as required so that the passing substrate or a multiplicity of packaging parts, containers, workpieces or the like can be coated.

Gemäß einer besonders bevorzugten Weiterbildung wird vorgeschlagen, dass die Hubvorrichtung zwei beabstandete und synchron rotierbare Drehkörper sowie ein exzentrisch an beiden Drehkörpern angelenktes Verbindungselement aufweist und der Träger mit dem Verbindungselement gekoppelt ist, so dass die Hin- und Herbewegung des Trägers und somit der Auftragsvorrichtung und gleichzeitig die synchrone Bewegung während des Kontaktes der Düsenanordnung mit dem Substrat auf konstruktiv einfache Weise erreicht wird. Der Träger wird zusammen mit der Auftragsvorrichtung hierbei auf eine Kreisbahn bewegt.According to a particularly preferred embodiment, it is proposed that the lifting device has two spaced and synchronously rotatable rotary body and an eccentrically articulated on both rotary bodies connecting element and the carrier is coupled to the connecting element, so that the reciprocating motion of the carrier and thus the applicator and simultaneously the synchronous movement is achieved during the contact of the nozzle assembly with the substrate in a structurally simple manner. The carrier is thereby moved together with the applicator device on a circular path.

Eine Weiterbildung sieht vor, dass die Drehkörper mittels einer Kette oder eines Zahnriemens synchron antreibbar sind und das Verbindungselement als Stange ausgebildet ist, die mittels zweier Drehgelenke an den Drehkörpern befestigt ist. Vorzugsweise wird die Hubvorrichtung derart angetrieben, dass während des Kontakts der Düsenanordnung mit dem zu beschichtenden Substrat der Träger im wesentlichen mit gleicher Geschwindigkeit und Richtung wie das Substrat bewegt wird, so dass ein präzises Auftragsbild erzeugt wird.A further embodiment provides that the rotary bodies are driven synchronously by means of a chain or a toothed belt and the connecting element is designed as a rod which is fastened by means of two rotary joints to the rotary bodies. Preferably, the lifting device is driven such that during the contact of the nozzle assembly with the substrate to be coated, the carrier is moved at substantially the same speed and direction as the substrate, so that a precise application image is generated.

Eine weitere alternative Aufführungsform zeichnet sich dadurch aus, dass ein die Drehkörper antreibender Antriebsmotor in Abhängigkeit von einem von einer Fördervorrichtung zum Bewegen des Substrats bereitgestellten Signals gesteuert wird. Der Antriebsmotor kann beispielsweise ein Servomotor sein, der mit einer solchen Geschwindigkeit angetrieben wird, dass während des Kontaktes die Düsenanordnung und das Substrat im wesentlichen mit der selben Geschwindigkeit in die selbe Richtung bewegt werden.Another alternative embodiment is characterized in that a driving motor driving the rotary bodies is controlled in response to a signal provided by a conveyor for moving the substrate. The drive motor may be, for example, a servomotor, which is driven at such a speed that during the contact Nozzle assembly and the substrate are moved in the same direction at substantially the same speed.

Vorzugsweise ermittelt ein Sensor die Geschwindigkeit der Relativbewegung zwischen Substrat und einem ortsfesten Punkt und stellt das Signal bereit, welches mittels einer Signalleitung dem Antriebsmotor der Hubvorrichtung zugeführt wird. Der Sensor ist ein Tachogenerator oder ein Inkrementaldrehgeber, der mit einer Rolle einer Fördervorrichtung oder der Antriebswelle des Antriebsmotors der Fördervorrichtung gekoppelt ist.Preferably, a sensor determines the speed of the relative movement between the substrate and a stationary point and provides the signal which is supplied by means of a signal line to the drive motor of the lifting device. The sensor is a tachogenerator or incremental encoder coupled to a roller of a conveyor or drive shaft of the drive motor of the conveyor.

Vorzugsweise weist die Fördervorrichtung zum Bewegen des Substrats ein Endlos-Förderband und mindestens zwei Rollen zum Aufnehmen des Förderbandes auf, von denen mindestens eine Rolle mittels eines Antriebsmotors angetrieben wird und einer der Drehkörper ist mittels einer Antriebskette oder eines Zahnriemens mechanisch mit dem Antriebsmotor der Fördervorrichtung gekoppelt.Preferably, the conveyor for moving the substrate comprises an endless conveyor belt and at least two rollers for receiving the conveyor belt, of which at least one roller is driven by a drive motor and one of the rotary bodies is mechanically coupled to the drive motor of the conveyor by means of a drive chain or a toothed belt ,

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus der beiliegenden Beschreibung von bevorzugten Ausführungsbeispielen unter Bezugnahme auf die beigefügten Zeichnungen:

Figur 1
eine Schnittdarstellung einer erfindungsgemäßen Vorrichtung zum Auftragen von Klebstoff mit einer erfindungsgemäßen Düsenanordnung;
Figur 2
eine vergrößerte Darstellung einer erfindungsgemäßen Düsenanordnung;
Figur 3
eine Draufsicht auf eine erfindungsgemäße Struktur in Form eines gesinterten Ringes.
Figur 4
eine schematische Darstellung weiterer alternativer Ausführungsformen einer erfindungsgemäßen Düsenanordnung in zwei Ausgestaltungen;
Figur 5
eine Draufsicht auf eine erfindungsgemäßen Struktur ein Form eines gesinterten Ringes;
Figur 6
ein weiteres alternatives Ausführungsbeispiel einer erfindungsgemäßen Düsenanordnung mit einem gesintereten Teil, welches eine Reihe von kommunizierenden Hohlräumen aufweist.
Figur 7
Eine erfindungsgemäße Auftragsvorrichtung mit einer Hubvorrichtung und einer Fördervorrichtung zum Fördern von Substraten in einer schematischen Darstellung;
Figur 8
ein weiteres Ausführungsbeispiel einer Hubvorrichtung und einer Fördervorrichtung zum Fördern von Substraten in einer schematischen Darstellung.
Further advantageous embodiments of the invention will become apparent from the accompanying description of preferred embodiments with reference to the accompanying drawings:
FIG. 1
a sectional view of a device according to the invention for applying adhesive with a nozzle arrangement according to the invention;
FIG. 2
an enlarged view of a nozzle arrangement according to the invention;
FIG. 3
a plan view of a structure according to the invention in the form of a sintered ring.
FIG. 4
a schematic representation of further alternative embodiments of a nozzle assembly according to the invention in two embodiments;
FIG. 5
a plan view of a structure according to the invention a form of a sintered ring;
FIG. 6
a further alternative embodiment of a nozzle assembly according to the invention with a sintered part, which has a series of communicating cavities.
FIG. 7
An application device according to the invention with a lifting device and a conveying device for conveying substrates in a schematic representation;
FIG. 8
a further embodiment of a lifting device and a conveying device for conveying substrates in a schematic representation.

Die in Figur 1 dargestellte Auftragsvorrichtung 1, die auch als Auftragskopf bezeichnet werden kann, dient zum Abgeben und Auftragen von Klebstoffen, insbesondere Heissschmelzklebstoff oder Kaltleim auf Oberflächen von Verpackungen oder auf andere Substrate im Kontaktverfahren und weist ein sogenanntes Steuerteil 2 mit einer Ventilanordnung 8 sowie eine erfingungsgemäße Düsenanordnung 4 auf. Das Steuerteil 2 hat ein metallisches Gehäuse 6, welches mit einem Grundkörper 10 verschraubt ist. In nicht näher dargestellter Weise ist ein an dem Grundkörper 10 befestigter Anschlussstutzen 12 mittels einer beheizbaren Schlauchleitung mit einem Klebstoffbehälter als Fluidquelle verbunden. Durch einen in dem Grundkörper 10 ausgebildeten Zuführkanal 14 kann Fluid durch eine in dem Gehäuse 6 des Steuerteiles 2 ausgebildete Schrägbohrung 16, welche mit dem Zuführkanal 14 kommuniziert, in eine in dem Gehäuse 6 ausgebildete Bohrung 18 einströmen.The application device 1 shown in FIG. 1, which can also be referred to as an application head, serves for dispensing and applying adhesives, in particular hotmelt adhesive or cold glue, to surfaces of packaging or to other substrates in the contact process and has a so-called control part 2 with a valve arrangement 8 and a erfingungsgemäße nozzle assembly 4. The control part 2 has a metallic housing 6, which is screwed to a base body 10. In a manner not shown a fixed to the base 10 connecting piece 12 is connected by means of a heatable hose with an adhesive container as a fluid source. By means of a feed channel 14 formed in the base body 10, fluid can flow into a bore 18 formed in the housing 6 through an oblique bore 16 formed in the housing 6 of the control part 2, which communicates with the feed channel 14.

Die Ventilanordnung 8 weist einen als Stange oder Nadel ausgebildeten Ventilkörper 20 auf, der achsial bezogen auf eine Zentralachse 22 des Steuerteiles 2 und der Düsenanordnung 4 bewegbar ist, so dass die untere Fläche 24 des Ventilkörpers 20 in bzw. ausser Kontakt mit einem Ventilsitz 26 kommt, der an einem mit dem Gehäuse 6 verschraubten Teil 28 ausgebildet ist. Der Ventilkörper 20 ist mit einem in einem Zylinder 30 bewegbaren Kolben 32 gekoppelt, welcher durch unterhalb des Kolbens 32 in dem Zylinderraum 30 einleitbare Druckluft mit einer Kraft aufschlagbar ist, die den Ventilkörper 20 nach oben gewegt, so dass die Ventilanordnung 8 in ihre Öffnungsstellung kommt, so dass Klebstoff aus dem Kanal 18 - nach unten - durch eine Bohrung 32 in dem Teil 28 in einen Fluidkanal 34 einströmen kann, der in einem Düsenkörper 34 der Düsenanordnung 4 ausgebildet ist. Die Druckluft wird in herkömmlicherweise durch eine Schrägbohrung 36 und eine Bohrung 38 in den Zylinder 30 eingeleitet. Hierzu wird ein nicht dargestelltes elektromagnetisch betätigbares Magnetventil geöffnet. Bei Einlassen der Druckluft auf dem Zylinderraum unterhalb des Kolbens 32 durch entsprechendes Schalten des Magnetventils wird mittels einer Spiralfeder 38 eine Kraft auf den Kolben 32 und damit den Ventilkörper 20 aufgebracht, die letzteren in Kontakt mit dem Ventilsitz 26 bringt, so dass die Ventilanordnung 8 in ihre Schließstellung kommt, so dass der Fluidfluss durch den Kanal 18 und somit die Bohrung 32 und den Fluidkanal 34 der Düsenanordnung 4 unterbrochen ist. Auf diese Weise kann die Ventilanordnung 8 intermittierend betätigt werden. Eine Befestigungsklemme 40 dient zum Anbringen der gesamten Aufragsvorrichtung 1 an einer Hubvorrichtung, wie nachfolgend beschrieben ist.The valve arrangement 8 has a valve body 20 in the form of a rod or needle, which is axially related to a central axis 22 of the control part 2 and the nozzle assembly 4 is movable so that the lower surface 24 of the valve body 20 comes into or out of contact with a valve seat 26 which is formed on a bolted to the housing 6 part 28. The valve body 20 is coupled to a piston 32 which is movable in a cylinder 30 and which can be impelled by compressed air which can be introduced below the piston 32 into the cylinder space 30 with a force which moves the valve body 20 upwards so that the valve arrangement 8 comes into its open position , so that adhesive from the channel 18 - down - through a bore 32 in the part 28 can flow into a fluid channel 34 which is formed in a nozzle body 34 of the nozzle assembly 4. The compressed air is introduced conventionally through a helical bore 36 and a bore 38 in the cylinder 30. For this purpose, an unillustrated electromagnetically actuated solenoid valve is opened. When the compressed air on the cylinder chamber below the piston 32 by appropriate switching of the solenoid valve, a force is applied to the piston 32 and thus the valve body 20 by means of a coil spring 38, the latter brings into contact with the valve seat 26, so that the valve assembly 8 in its closed position comes, so that the fluid flow through the channel 18 and thus the bore 32 and the fluid channel 34 of the nozzle assembly 4 is interrupted. In this way, the valve assembly 8 can be actuated intermittently. A mounting clamp 40 serves to attach the entire applicator 1 to a lifting device, as described below.

Die Düsenanordnung 4 ist, wie aus Figur 1 ersichtlichh ist, mit dem Steuerteil 2 verschraubt. An dem Düsenkörper 34 ist hierzu ein Innengewinde 42 ausgebildet (Figur 2), welches mit einem an dem Teil 28 ausgebildeten Außengewinde 44 zusammenwirkt. Der Fluidkanal 34 der Düsenanordnung 4 setzt sich fort in Flussrichtung durch mehrere gleichmäßig über den Umfang verteilte schräg zur Zentralachse 22 angeordnete Bohrungen 46 und durch einen in dem Düsenkörper 34 ausgebildeten Ringkanal 48. Der Fluidkanal 34 mündet in eine im Ausführungsbeispiel kreisringförmige Austrittsöffnung 50, durch welche das hindurchströmende Fluid abgegeben wird.As can be seen from FIG. 1, the nozzle arrangement 4 is screwed to the control part 2. For this purpose, an internal thread 42 is formed on the nozzle body 34 (FIG. 2), which cooperates with an external thread 44 formed on the part 28. The fluid channel 34 of the nozzle arrangement 4 continues in the direction of flow through a plurality of holes 46 distributed uniformly around the circumference and inclined to the central axis 22 and through an annular channel 48 formed in the nozzle body 34. The fluid channel 34 opens into an annular outlet opening 50 in the exemplary embodiment the fluid flowing through is discharged.

In dem durch den Ringkanal 48 gebildeten unteren Abschnitt des Fluidkanals 34 ist eine erfindungsgemäße Struktur 52 ausgebildet oder angeordnet, welche eine Vielzahl von wenigstens teilweise miteinander kommunizierenden Hohlräumen 54 aufweist, die lediglich schematisch dargestellt sind. Die Struktur 52 ist fluiddurchlässig, so dass durch die kommunizierenden Hohlräume 54 Fluid durch die Bohrungen 46 und den Ringkanal 48 strömen und durch die Austrittsöffnung 50 austreten. Im Ausführungsbeispiel ist die Struktur 52 ein separtes, gesintertes Metallteil. Gesintete Metalle werden bekanntlich durch Metallpartikel, welche mit Oberflächenabschnitten miteinander verschmolzen werden, hergestellt, so dass eine starre Struktur mit einer Vielzahl von kommunizierenden Hohlräumen gebildet ist. Das gesinterte Teil ist im Ausführungsbeispiel in den Ventilkörper 34 eingepresst. Altenativ könnte die Struktur 52 aus einem Schaumstoff, aus einem gewebten Material, einem Metallgewebe, einem Gitter aus Metallstäben oder dergleichen gebildet sein . Die Austrittsöffnung 50 und die untere Kontakt-Fläche der gesinterten Struktur 52 fallen in den Figuren 1 bis 3 dargestellten Ausführungsbeispiel zusammen. In nicht dargestellter Weise könnte die gesamte Düsenanordnung 4 als einstückiges Teil ausgebildet sein, wobei die fluiddurchlässige Struktur in dem Fluidkanal durch geeignete mechanische oder thermische Werkstückbearbeitungsverfahren hergestellt werden kann, beispielsweise durch Stanzen.In the lower portion of the fluid channel 34 formed by the annular channel 48, a structure 52 according to the invention is formed or arranged, which has a plurality of at least partially mutually communicating cavities 54, which are shown only schematically. The structure 52 is fluid-permeable so that fluid flows through the communicating cavities 54 through the bores 46 and the annular channel 48 and exits through the outlet opening 50. In the exemplary embodiment, the structure 52 is a separate, sintered metal part. Sintered metals are known to be made by metal particles which are fused together with surface portions, so that a rigid structure is formed with a plurality of communicating cavities. The sintered part is pressed in the embodiment in the valve body 34. Alternatively, the structure 52 could be formed of a foam, a woven material, a metal mesh, a mesh of metal rods, or the like. The outlet opening 50 and the lower contact surface of the sintered structure 52 coincide in the embodiment illustrated in FIGS. In a manner not shown, the entire nozzle assembly 4 could be formed as an integral part, wherein the fluid-permeable structure in the fluid channel can be produced by suitable mechanical or thermal workpiece processing methods, for example by punching.

Figur 4 zeigt zwei alternative Ausführugsbeispiele einer erfindungsgemäßen Düsenanordnung 4. Links von der Zentralachse 22 ist ein Ausführungsbeispiel dargestellt, bei dem die Hohlräume 54 aufweisenen Struktur 52 sich über die Austrittsöffnung 50 des Fluidkanals 34 hinaus erstreckt und somit von dem Düsenkörper 35 absteht. Dies hat den Effekt, dass Fluid aus dem abstehenden Teil der Struktur 52 aus den seitlichen Oberflächen 56 austritt und aus einer unteren Oberfläche 58. Durch Einführen des abstehenden Abschnitts in eine entsprechend ausgebildete Ausnehmung eines zu beschichtenden Gegenstandes könnten dessen gegenüberliegende Oberflächen beschichtet werden.FIG. 4 shows two alternative embodiments of a nozzle arrangement 4 according to the invention. On the left side of the central axis 22 is shown an embodiment in which the structure 54 comprising the cavities 54 extends beyond the outlet opening 50 of the fluid channel 34 and thus protrudes from the nozzle body 35. This has the effect of expelling fluid from the protruding portion of the structure 52 from the side surfaces 56 and from a bottom surface 58. By inserting the protruding portion into a correspondingly formed recess of an article to be coated, its opposite surfaces could be coated.

In dem rechten Abschnitt der Figur 4 ist ein weiteres Ausführungsbeispiel der Düsenanordnung 4 schematisch dargestellt, bei welchem die Struktur 52 ebenfalls sich über die Austrittsöffnung 50 hinaus erstreckt, jedoch innenseitig und unterseitig durch einen Ansatz 60 des Düsenkörpers 35 eingefasst ist, so dass Fluid nur aus einer äußeren Ringfläche 62, die an der Struktur 52 ausgebildet ist, austreten kann. Auf diese Weise ließe sich durch Einführen der Düsenanordnung 4 in eine Ausnehmung eines zu beschichtenden Gegenstandes eine Ringfläche gezielt beschichten, beispielsweise mit Klebstoff. Die Struktur 52 ist bei den in Figur 4 dargestellten Ausführungsbeispiel ebenfalls als Sinterteil ausgebilet. Der untere Abschnitt 64 des Ansatzes 60 könnte nach Einsetzen des Sinterteiles in den Ringkanal 48 nach der Montage angeschweist werden.In the right-hand section of FIG. 4, a further exemplary embodiment of the nozzle arrangement 4 is schematically illustrated, in which the structure 52 likewise extends beyond the outlet opening 50, but is bordered on the inside and on the underside by a projection 60 of the nozzle body 35, so that fluid only emerges an outer annular surface 62 formed on the structure 52 can escape. In this way, by inserting the nozzle arrangement 4 into a recess of an object to be coated, an annular surface can be selectively coated, for example with adhesive. The structure 52 is also ausgebilet in the embodiment shown in Figure 4 as a sintered part. The lower portion 64 of the lug 60 could be angeschweiß after insertion of the sintered part in the annular channel 48 after assembly.

Fig. 6 zeigt ein weiteres alternatives Ausführungsbeispiel einer erfindungsgemäßen Düsenanordnung 4, bei dem in Abweichung zu den zuvor beschriebenen Ausführungsbeispielen anstelle eines Ringkanals 48 eine Zylinderbohrung 66 Teil des Fluidkanals 34 ist und in diese eine gesinnterte ebenfalls zylindrische Struktur 52 mit einer Vielzahl von kommunizierenden Hohlräumen 54, die schematisch angedeutet sind, eingesetzt ist, so dass die untere Kontakt-Fläche 68, die mit einem zu beschichtenden Substrat in Kontakt gebracht werden kann, und die Austrittsöffnung 50 des Fluidkanals 34 zusammenfallen.FIG. 6 shows a further alternative embodiment of a nozzle arrangement 4 according to the invention, in which, unlike the previously described embodiments, a cylinder bore 66 is part of the fluid channel 34 instead of an annular channel 48 and into this a closed cylindrical structure 52 having a plurality of communicating cavities 54 schematically indicated, is inserted so that the lower contact surface 68, which can be brought into contact with a substrate to be coated, and the outlet opening 50 of the fluid channel 34 coincide.

Die Fig. 7 und 8 veranschaulichen schematisch eine erfindungsgemäße Auftragsvorrichtung 1 und eine erfindungsgemäße Düsenanordnung gemäß den Fig. 1 bis 6, eine erfindungsgemäße Hubvorrichtung 70, an welcher die Auftragsvorrichtung 1 montiert ist, sowie eine Fördervorrichtung 72 zum Bewegen von mit Fluid zu beschichtenden Substraten, hier Verpackungen 74, die als Boxen ausgebildet sind.7 and 8 schematically illustrate an application device 1 according to the invention and a nozzle arrangement according to the invention according to FIGS. 1 to 6, a lifting device 70 according to the invention, on which the application device 1 is mounted, and a conveying device 72 for moving substrates to be coated with fluid, here packaging 74, which are designed as boxes.

Die Fördervorrichtung 72 ist als herkömmliches Förderband mit zwei (oder ggf. mehreren) zylindrischen Rollen 76, 78 und einem von diesen gespannten und geführten Endlos-Förderband 80 ausgeblidet. Auf dem Obertrum liegen die Verpackungen 74 und werden in Richtung des Pfeils 82 linear mit konstanter Geschwindigkeit bewegt. Die rechte Rolle 74 wird in nicht dargestellter Weise mittels eines Elektromotors angetrieben. Die Rollen 78 sind an einer Rahmenstruktur gelagert. Ein Tachogenerator 84 nimmt als Sensor von der Fördervorrichtung 72 die Geschwindigkeit des Förderbandes 80 auf und stellt ein Signal bereit, welches durch eine Leitung 86 zu einem Servomotor 88 der Hubvorrichtung 70 übertragen wird.The conveyor 72 is slid as a conventional conveyor belt with two (or possibly more) cylindrical rollers 76, 78 and one of these tensioned and guided endless conveyor belt 80. On the upper strand are the packages 74 and linear in the direction of arrow 82 with constant Speed moves. The right roller 74 is driven in a manner not shown by means of an electric motor. The rollers 78 are mounted on a frame structure. A tachogenerator 84 receives as a sensor from the conveyor 72, the speed of the conveyor belt 80 and provides a signal which is transmitted through a line 86 to a servo motor 88 of the lifting device 70.

Die Hubvorrichtung 70 bewirkt, dass die Auftragsvorrichtung 1 zusammen mit der erfindungsgemäßen Düsenanordnung 4, (die in den Fig. 7 und 8 nicht im Einzelnen dargestellt ist) entlang einer Kreisbahn 90 in Richtung des Pfeils 92 rotiert wird und dabei eine Hin- und Herbewegung ausführt, die die Unterseite der Düsenanordnung 4 und die untere Kontakt-Fläche der Struktur 52 (sh. Fig. 2 bis 6) in und außer Kontakt bringt mit einer Oberseite 94 der Verpackungen 74. Überlagert ist eine Hin- und Herbewegung in und entgegen der Richtung der Bewegung der Verpackungen 74 (Pfeil 82), so dass insgesamt eine Bewegung auf einer Kreisbahn 90 entsteht.The lifting device 70 causes the application device 1, together with the nozzle assembly 4 according to the invention (not shown in detail in FIGS. 7 and 8) to be rotated along a circular path 90 in the direction of the arrow 92, thereby performing a reciprocating motion which brings the bottom of the nozzle assembly 4 and the lower contact surface of the structure 52 (see Figures 2 to 6) into and out of contact with a top 94 of the packages 74. Superimposed is a reciprocating motion in and against the direction the movement of the packaging 74 (arrow 82), so that a total of a movement on a circular path 90 is formed.

Die Hubvorrichtung 70 weist zwei an gelagerten Wellen 96 befestigte Drehkörper 98, 100 auf, an denen mittels Drehgelenken 102, 104 ein Verbindungselement 106 in Form einer Stange exzentrisch angelenkt ist, die horizontal angeordnet ist. Die Drehgelenke 102, 104 können durch Bolzen oder Kugellager oder dgl. gebildet sein. Ein Träger 108 ist an das Verbindungselement 106 montiert und trägt die komplette Auftragsvorrichtung 1 sowie die zugehörige Düsenanordnung 4. Die Wellen 96 und somit die Drehkörper 98, 100 sind mittels Rädern 110, 112 und einem Zahnriemen 114 oder einer Kette miteinander gekoppelt, so dass sie synchron rotiert werden. Es entsteht eine Art Zwangssteuerung, so dass die Auftragsvorrichtung 1 die zuvor beschriebene Bewegung auf einer Kreisbahn 90 ausführt.The lifting device 70 has two rotating bodies 98, 100 mounted on supported shafts 96, on which by means of rotary joints 102, 104 a connecting element 106 in the form of a rod is articulated eccentrically, which is arranged horizontally. The hinges 102, 104 may be formed by bolts or ball bearings or the like. A carrier 108 is mounted to the connecting member 106 and carries the complete applicator 1 and the associated nozzle assembly 4. The shafts 96 and thus the rotary bodies 98, 100 are coupled together by means of wheels 110, 112 and a toothed belt 114 or a chain, so that they be rotated synchronously. The result is a kind of forced control, so that the application device 1 performs the movement described above on a circular path 90.

Bei dem in Fig. 7 dargestellten Ausführungsbeispiel wird, wie schematisch dargestellt ist, ein mit dem Rad 112 gekoppeltes Antriebsrad 116 von dem Servomotor 88 angetrieben (gestrichelte Linie 118). Die Drehgeschwindigkeit des Servomotors 88 wird mittels des von dem Tachogenerator 84 bereitgestellten Signals derart gesteuert, dass während des Kontakts der Düsenanordnung 4 des Auftragskopfes 1 mit der Oberseite 94 einer Verpackung 74 im Wesentlichen die selbe Geschwindigkeit in Richtung des Pfeils 82 eingestellt ist im Verhältnis zu der Geschwindigkeit der Verpackungen 74 in Richtung des Pfeils 82. Auf diese Weise kann ein präziser Auftragstransfer von Klebstoff erreicht werden. Schematisch ist die aufgetragene Klebstoffbeschichtung 120 bzw. der zu beschichtende Bereich 122 oberhalb der Verpackungen 74 dargestellt.In the embodiment shown in Fig. 7, as schematically shown, coupled to the wheel 112 drive wheel 116 of the servo motor 88 driven (dashed line 118). The rotational speed of the servomotor 88 is controlled by means of the signal provided by the tachogenerator 84 such that during contact of the nozzle assembly 4 of the applicator head 1 with the top surface 94 of a package 74 substantially the same speed is set in the direction of the arrow 82 in relation to FIG Speed of the packages 74 in the direction of the arrow 82. In this way, a precise job transfer of adhesive can be achieved. Schematically, the applied adhesive coating 120 or the region 122 to be coated is shown above the packaging 74.

Bei dem in Fig. 8 dargestellten alternativen Ausführungsbeispiel ist das Rad 116 der Hubvorrichtung 70 mittels eines Zahnriemens 124 mit einem Rad 126 gekoppelt und wird von diesem angetrieben. Das Rad 126 ist seinerseits auf der selben Welle 128 befestigt wie die Rolle 78, so dass eine mechanische Kopplung zwischen dem nicht dargestellten Antriebsmotor der Fördervorrichtung 72 und der Hubvorrichtung gebildet ist.In the alternative embodiment shown in Fig. 8, the wheel 116 of the lifting device 70 is coupled by means of a toothed belt 124 with a wheel 126 and is driven by the latter. The wheel 126 is in turn mounted on the same shaft 128 as the roller 78, so that a mechanical coupling between the drive motor, not shown, the conveyor 72 and the lifting device is formed.

Das Verfahren zum Auftragen von Fluid auf die Oberseiten 94 der Verpackungen 74 wird wie folgt ausgeführt:The method of applying fluid to the tops 94 of the packages 74 is performed as follows:

Während die Düsenanordnung 4 außer Kontakt mit einer Oberseite 94 der Verpackung 74 ist, wird das Auftragsventil 8 der Auftragsvorrichtung 1 eine kurze Zeit geöffnet, so dass Fluid durch den Fluidkanal 34 hindurchströmt und sich an der unteren Kontakt-Fläche der Stuktur 52 eine Klebstoffmenge ansammelt, die jedoch anhaftet und nicht heruntertropft. Dann wird das Auftragsventil 8 wieder geschlossen. Gleichzeitig bewegt die Hubvorrichtung 70 die Auftragsvorrichtung 1 entlang der Kreisbahn 90 und die Fördervorrichtung 72 bewegt eine Verpackung 74 in Richtung auf die Auftragsvorrichtung 1.While the nozzle assembly 4 is out of contact with an upper surface 94 of the package 74, the application valve 8 of the applicator 1 is opened for a short time so that fluid flows through the fluid channel 34 and an amount of adhesive accumulates on the lower contact surface of the structure 52, but it adheres and does not drip. Then the order valve 8 is closed again. At the same time, the lifting device 70 moves the application device 1 along the circular path 90 and the conveying device 72 moves a package 74 in the direction of the application device 1.

Ist die Verpackung 74 in einen Bereich unterhalb der Auftragsvorrichtung 1 gelangt aufgrund der Bewegung auf der Kreisbahn 90 und die Düsenanordnung 8 in Kontakt mit der Oberseite 94 der Verpackung 74, wird die an der Unterseite der Struktur 50 anhaftende Klebstoffmenge auf die Oberseite 120 in einem definierten Auftragsbild transferiert und bleibt dort haften. Während des Kontaktes werden aufgrund der erfindungsgemäßen synchronisierten Steuerung der Fördervorrichtung 72 und der Hubvorrichtung 70 die Düsenanordnung 4 und die Verpackungen 74 im Wesentlichen mit der selben Geschwindigkeit in Richtung des Pfeils 82 bewegt. Die Relativgeschwindigkeit ist während des Kontaktes geht im Wesentlichen gegen null.Is the package 74 in an area below the applicator 1 passes due to the movement on the circular path 90 and the nozzle assembly 8 in Contact with the top 94 of the package 74, the amount of adhesive adhered to the bottom of the structure 50 is transferred to the top 120 in a defined application image and remains adhered thereto. During contact, due to the inventive synchronized control of the conveyor 72 and the lifting device 70, the nozzle assembly 4 and the packages 74 are moved in the direction of the arrow 82 at substantially the same speed. The relative velocity during contact is essentially zero.

Anschließend gelangt während der weiteren Bewegung der Kreisbahn 90 die Düsenanordnung 4 wieder außer Kontakt von der Oberseite 94 der Verpackung 74, während diese weiter fortbewegt wird in Richtung des Pfeils 82. Nun kann erneut das Auftragsventil 8 in die Öffnungsstellung gebracht werden, so dass erneut der Fluidfluss in dem Fluidkanal 34 kurz freigegeben wird, so dass eine Klebstoffmenge durch den Fluidkanal strömt. Der zuvor beschriebene Vorgang kann nun beliebig oft wiederholt werden.Subsequently, during the further movement of the circular path 90, the nozzle assembly 4 again comes out of contact from the top 94 of the package 74, while this is further moved in the direction of arrow 82. Now, the order valve 8 can be brought into the open position again, so that again the Fluid flow in the fluid passage 34 is briefly released, so that an amount of adhesive flows through the fluid channel. The process described above can now be repeated as often as desired.

Claims (21)

  1. A nozzle arrangement for the, in particular mechanical, delivery and application of adhesive onto a movable substrate,
    with a nozzle body (35) and at least one fluid channel (34) formed in the nozzle body (35), said fluid channel (34) being able to be connected with a fluid source and having an outlet opening (50) through which the fluid can flow out and be delivered,
    characterized in that
    - in the fluid channel (34) a fluid-permeable structure (52) is formed, having a plurality of communicating cavities (54),
    - the nozzle arrangement is fastened to an applicator head of a fluid applicator device (1) and
    - the applicator head has an intermittently actuatable applicator valve (8) for the selective interruption or release of the fluid flow in the fluid channel (34) of the nozzle arrangement (4).
  2. The nozzle arrangement according to Claim 1,
    characterized in that the fluid-permeable structure (52) extends up to the outlet opening (50) of the fluid channel (34).
  3. The nozzle arrangement according to Claim 2,
    characterized in that the fluid-permeable structure (52) is formed on a separate part which is able to be inserted into the fluid channel (34) of the nozzle body (35).
  4. The nozzle arrangement according to Claim 3,
    characterized in that the separate part consists of a sintered material, in a sintered metal, foam, a woven material or a metal gauze.
  5. The nozzle arrangement according to any of the preceding claims,
    characterized in that the fluid-permeable structure (52) extends beyond the outlet opening (50) and projects from the nozzle body (35).
  6. The nozzle arrangement according to any of Claims 3 to 5,
    characterized in that the separate part has a contact surface which is able to be brought into contact with a substrate which is to be coated with fluid.
  7. The nozzle arrangement according to Claim 6, characterized in that the contact surface is substantially circular, in the shape of a circular ring, square, rectangular or oval.
  8. The nozzle arrangement according to any of the preceding Claims 3 to 7,
    characterized in that the separate part is pressed into the fluid channel (34).
  9. A device for the, in particular mechanical, application of fluid, particularly of adhesive, onto a substrate which is movable relative to the device,
    with a supply channel (18), connectable to a fluid source, for the supply of fluid,
    a nozzle arrangement (4), able to be supplied with fluid by means of the supply channel (18), with an outlet opening (50) for the delivery of the fluid, and with a valve arrangement for the intermittent interruption or release of the fluid flow, which has a valve body which is movable relative to a valve seat (26),
    characterized in that the nozzle arrangement (4) is formed according to any of the preceding Claims 1 to 8.
  10. The device according to Claim 9,
    characterized in that the nozzle arrangement (4) or the entire device is fastened to an elevating device (70) which has a movable support to receive the device or the applicator head, the support (108) being movable and drivable such that the applicator head or the applicator device (1) is moved to and from relative to a substrate which is to be coated with fluid such that the nozzle arrangement (4) on the one hand comes in and out of contact with a substrate which is to be coated and is movable relative to the device, and on the other hand during the contact with the substrate is moved together therewith in the direction of the relative movement between substrate and applicator device (1).
  11. The device according to Claim 10,
    characterized in that the elevating device (70) has two rotary bodies (98, 100) which are spaced apart and are rotatable in synchronism, and also has a connecting element (106) articulated eccentrically to both rotary bodies (98, 100), and the support (108) is coupled with the connecting element (106).
  12. The device according to Claim 11,
    characterized in that the rotary bodies (98, 100) are drivable in synchronism by means of a chain or a toothed belt (114), and the connecting element (106) is constructed as a rod which is fastened to the rotary bodies (98, 100) by means of two swivel joints (102, 104).
  13. The device according to Claim 11 or 12,
    characterized in that the elevating device (70) is driven such that during the contact of the nozzle arrangement with the substrate which is to be coated, the support is moved substantially at the same speed and in the same direction as the substrate.
  14. The device according to Claim 13,
    characterized in that a drive motor, driving the rotary bodies (98, 100) is controlled as a function of a signal provided by a conveyor device (72) for moving the substrate.
  15. The device according to Claim 14,
    characterized in that a sensor (84) determines the speed of the relative movement between substrate and a fixed point and provides the signal, and that a signal is supplied to the drive motor of the elevating device (70) by means of a signal line (86).
  16. The device according to Claim 15,
    characterized in that the sensor is a tachogenerator.
  17. The device according to any of Claims 9 to 16,
    characterized in that the conveyor device (72) for moving the substrate has an endless conveyor belt (80) and at least two rollers (76, 78) to receive the conveyor belt (80), at least one roller (78) of which is driven by means of a driving motor, and that one of the rotary bodies (98, 100) is coupled mechanically with the driving motor of the conveyor device (72) by means of a drive chain (124) or a toothed belt.
  18. The device according to any of Claims 9 to 17,
    characterized in that the fluid-permeable structure (52) has a contact surface which has any desired form, so that application patterns which have a sharp edge can be produced on the substrate.
  19. A method for the, particularly mechanical, application of adhesive onto a movable substrate,
    in which the fluid is supplied from a fluid source of a nozzle arrangement which has a nozzle body (35) and a fluid channel (34) formed in the nozzle body (35), in which the fluid flows through the fluid channel (34) up to an outlet opening (50), and in which the nozzle arrangement is fastened to an applicator head of a fluid applicator device,
    characterized in that the fluid flows through a fluid-permeable structure (52) having cavities and which is formed in the fluid channel (34), and the fluid-permeable structure (52) is brought in contact with the movable substrate which is to be coated, so that the fluid passes over onto the substrate, the fluid flow being selectively interrupted or released by means of an intermittently actuatable applicator valve of the applicator head.
  20. The method according to Claim 19,
    characterized in that the fluid is delivered from a surface of the fluid-permeable structure (52) which has any desired shape.
  21. The method according to Claim 20,
    characterized in that the fluid is delivered from a surface of the structure (52) which is circular, in the shape of a circular ring, square, rectangular or oval.
EP01123714A 2000-10-20 2001-10-04 Nozzle apparatus, coating device and coating method Expired - Lifetime EP1199108B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10052280 2000-10-20
DE10052280A DE10052280A1 (en) 2000-10-20 2000-10-20 Nozzle arrangement, application device and application method

Publications (3)

Publication Number Publication Date
EP1199108A2 EP1199108A2 (en) 2002-04-24
EP1199108A3 EP1199108A3 (en) 2003-10-15
EP1199108B1 true EP1199108B1 (en) 2007-04-18

Family

ID=7660602

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01123714A Expired - Lifetime EP1199108B1 (en) 2000-10-20 2001-10-04 Nozzle apparatus, coating device and coating method

Country Status (3)

Country Link
EP (1) EP1199108B1 (en)
AT (1) ATE359868T1 (en)
DE (2) DE10052280A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023108694A1 (en) 2023-04-05 2024-04-18 Audi Aktiengesellschaft Application device and robot arrangement

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202005000656U1 (en) * 2005-01-17 2005-03-17 Hhs Leimauftrags Systeme Gmbh Device for the intermittent delivery of fluid media
DE102005023046A1 (en) * 2005-05-13 2006-11-16 Nordson Corp., Westlake Glue nozzle with cooled monitoring optics
US20070145164A1 (en) * 2005-12-22 2007-06-28 Nordson Corporation Jetting dispenser with multiple jetting nozzle outlets
DE102009019192B4 (en) * 2009-04-28 2014-08-07 Dürr Systems Wolfsburg GmbH Short track gun
DE102014113952A1 (en) * 2014-09-26 2016-03-31 Khs Gmbh Device and method for applying adhesive to an object
CN117359078B (en) * 2023-12-06 2024-02-23 四川钛程钛业有限公司 Explosion welding device and explosion welding method for marine titanium steel composite board

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB688161A (en) * 1950-12-13 1953-02-25 Eclipse Spraying Company Ltd Improvements in sprayer nozzles
US5122158A (en) * 1981-07-16 1992-06-16 Kao Corporation Process for cleaning clothes
US4657186A (en) * 1985-10-04 1987-04-14 Shapiro Eugene B Stream former

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023108694A1 (en) 2023-04-05 2024-04-18 Audi Aktiengesellschaft Application device and robot arrangement

Also Published As

Publication number Publication date
EP1199108A3 (en) 2003-10-15
EP1199108A2 (en) 2002-04-24
ATE359868T1 (en) 2007-05-15
DE50112364D1 (en) 2007-05-31
DE10052280A1 (en) 2002-04-25

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