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EP2433717B1 - Device for selectively applying adhesive without the need for retrofitting - Google Patents

Device for selectively applying adhesive without the need for retrofitting Download PDF

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Publication number
EP2433717B1
EP2433717B1 EP10178285A EP10178285A EP2433717B1 EP 2433717 B1 EP2433717 B1 EP 2433717B1 EP 10178285 A EP10178285 A EP 10178285A EP 10178285 A EP10178285 A EP 10178285A EP 2433717 B1 EP2433717 B1 EP 2433717B1
Authority
EP
European Patent Office
Prior art keywords
adhesive
roller
adhesives
gap
proportioning
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.)
Not-in-force
Application number
EP10178285A
Other languages
German (de)
French (fr)
Other versions
EP2433717A1 (en
Inventor
Stefan Specht
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.)
Friz Kaschiertechnik GmbH
Original Assignee
Friz Kaschiertechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP10178285A priority Critical patent/EP2433717B1/en
Application filed by Friz Kaschiertechnik GmbH filed Critical Friz Kaschiertechnik GmbH
Priority to ES10178285T priority patent/ES2411129T3/en
Priority to PL10178285T priority patent/PL2433717T3/en
Priority to CN201180007928.7A priority patent/CN102740983B/en
Priority to PCT/EP2011/066001 priority patent/WO2012038316A1/en
Priority to US13/582,023 priority patent/US20120318193A1/en
Priority to RU2012131531/05A priority patent/RU2571143C2/en
Publication of EP2433717A1 publication Critical patent/EP2433717A1/en
Priority to HK12107318.6A priority patent/HK1166753A1/en
Application granted granted Critical
Publication of EP2433717B1 publication Critical patent/EP2433717B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B05C1/08—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 using a roller or other rotating member which contacts the work along a generating line
    • B05C1/086—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 using a roller or other rotating member which contacts the work along a generating line a pool of coating material being formed between a roller, e.g. a dosing roller and an element cooperating therewith
    • B05C1/0865—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 using a roller or other rotating member which contacts the work along a generating line a pool of coating material being formed between a roller, e.g. a dosing roller and an element cooperating therewith the cooperating element being a roller, e.g. a coating roller
    • 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
    • B05C1/08—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 using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0813—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 using a roller or other rotating member which contacts the work along a generating line characterised by means for supplying liquid or other fluent material to the roller
    • 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
    • B05C1/08—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 using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—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 using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/083—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 using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets being passed between the coating roller and one or more backing rollers

Definitions

  • the present invention relates to a device for the optional conversion-free application of hotmelt adhesives, in particular PUR adhesives, and dispersion adhesives, in particular PVAc adhesives, on flat objects, in particular plate-shaped components which at least partially made of wood, wood materials, plastic or the like.
  • glue application machines which apply glue to the substrate with the aid of rollers. Such machines are so far specialized in their equipment and structural design on the type of glue to be processed. Thus, there are machines with which low-viscosity glues such as solvent adhesive or PVAc adhesives (white glues) can be applied. Furthermore, there are glue application machines, which are only suitable for the application of hot melt adhesives (hotmelts).
  • hotmelts hot melt adhesives
  • a device according to the invention is set up, optionally without hot-melt adhesives, in particular PUR adhesives, and dispersion adhesives, in particular PVAc adhesives, to be applied to flat objects without a necessary conversion.
  • the device for adhesive application to plate-shaped components which consist at least partially of wood, wood materials, plastic or the like provided.
  • the term adhesive should be understood to include the glues according to the above categories.
  • the apparatus comprises at least one applicator roll for applying the adhesive and at least one metering roller for metering the adhesive, which side by side forming a tapered gap, in which the adhesive is supplied, are arranged forming.
  • the rollers rotate, with the adhesive passing through the nip between the rollers.
  • the distance of the metering roller to the applicator roll defines the gap width, which limits the amount of adhesive that is applied to the applicator roll and from there to the workpiece. A larger gap width allows more adhesive to reach the applicator roll and thus the workpiece.
  • both a glue supply for Hot melt adhesive as well as a glue supply for Dispersion adhesive provided, which are connected via an adhesive feed system with the gap. Because both types of adhesives are stored on the device and can be supplied to it, it is possible to selectively supply one of the adhesives of the device without retooling.
  • the supply system has corresponding supply lines and valves, which allow an optional supply of a type of adhesive without retooling.
  • the applicator roll on an outer coating, in particular a rubber coating, which prevents diffusing inward of water components of the dispersion adhesive in the applicator roll.
  • the applicator roll may also be made of base materials into which the dispersion adhesives would diffuse and which would not be usable without coating.
  • the metering roller or preferably also the applicator roller is particularly preferably heated. This allows hot melt adhesives to the desired operating temperature to be heated. Furthermore, the viscosity of the adhesives can be adapted very well to the process parameters via the temperature.
  • the device has at least one adhesive seal which seals the end face between the applicator roller and the metering roller in such a way that the adhesive in the tapering gap is largely prevented from extending outward in the axial direction of the rollers.
  • two adhesive seals are provided, which seal the gap on both sides to the ends of the shafts in the axial direction of the waves. This prevents the adhesive fed into the nip, which collects there like in a kind of gutter, from running towards the ends of the rolls.
  • the gap which is formed in the profile of the sheets of the metering roller and applicator roll, are made particularly flexible and accurate, which causes a high lateral tightness.
  • the temperature of the metering roller and / or the applicator roll is controllable. Since various adhesives are to be used flexibly, this embodiment has the advantage that the temperature of the respective roller can be optimally adapted to the requirements with regard to the processing temperature of the particular adhesive.
  • two separate adhesive delivery systems are provided. This makes it particularly easy to switch between the use of the individual types of adhesive, since a cleaning of a common supply line is eliminated.
  • the structure of the applicator rubber coating prevents ingress of water constituents of the dispersion adhesive. As the adhesive change requires a thorough cleaning of the machine anyway, it is unlikely that moisture will be transferred to the PUR glue bath. Experiments have shown that the influence is not greater than it occurs anyway by the normal humidity present. Deriving from this, the invention consists in the fact that no machine components need to be replaced.
  • the invention further consists of the equipment of the metering roller with a turn-off heating.
  • the glue bath is advantageously permanently heated via the metering roller.
  • this heater is simply switched off as PVAc adhesive is processed cold.
  • PVAc dispersion adhesives
  • Another component of the invention is the equipment of the machine with two separate glue supply systems, one for PUR adhesives and one for dispersion adhesives.
  • Fig. 1 shows a schematic partial perspective view of a device 1 according to the invention for the optional conversion-free application of adhesives.
  • a workpiece 20 to be coated is arranged between an application roller 4 and a metering roller 6 on one side and a counterpressure roller 8 on the other side.
  • the application roller 4 is arranged so close to the metering roller 6 that they form a tapered gap 7.
  • adhesive 30 is arranged.
  • the workpiece 20 is conveyed in the feed direction V.
  • the application roller 4 rolls on the workpiece 20.
  • Adhesive 30 is continuously fed to the gap 7.
  • the adhesive 30 passes in a defined amount corresponding to the nip width through the nip between the applicator roll 4 and the metering roller 6 on the lower part of the applicator roll 4 and finally on the workpiece 20.
  • the workpiece 20 is coated with adhesive 30.
  • the metering roller 6 is heatable in this embodiment, to heat the adhesive 30.
  • the applicator roll 4 has an outer coating 5, here a gumming, which prevents the inward diffusion of water constituents into the applicator roll 4 when using dispersion adhesive 30.
  • An adhesive seal 10 is provided which the gap 7 between applicator roller 4 and metering roller 6 so that the adhesive 30 is prevented in the tapered gap 7 largely from running in the axial direction of the rollers 4, 6 to the outside so as to seal the front side.
  • the adhesive seal 10 consists in this embodiment of individual mutually displaceable segments 12, here plastic jaws which bear tightly against each other under pressure.
  • the supply of the adhesive 30 is determined by FIG. 2 shown.
  • Fig. 2 shows a schematic perspective view of a device 1 according to the invention for the optional conversion-free application of adhesives.
  • the delivery system 37 for adhesive 30 is shown.
  • a supply of hot melt adhesive 36 is connected to the gap 7 via a hot melt adhesive feed line 39.
  • the metering roller 6 is heated to heat the adhesive 30.
  • adhesive 30 from the Dispersion adhesive supply 35 are supplied via the supply line for dispersion adhesive 38.
  • a return line with filter system 40 for Dispersion adhesive, in particular PVAc adhesive is connected to the supply of dispersion adhesive 35 and serves for the recycling and conditioning of the adhesive.
  • the heating of the metering roller 6 is preferably switched off.

Landscapes

  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Description

Technisches GebietTechnical area

Die vorliegende Erfindung bezieht sich auf eine Vorrichtung zum wahlweisen umrüstfreien Auftragen von Schmelzklebstoffen, insbesondere PUR-Klebstoffen, und Dispersionsklebstoffen, insbesondere PVAc-Klebstoffen, auf flächige Gegenstände, insbesondere plattenförmige Bauteile, die zumindest abschnittsweise aus Holz, Holzwerkstoffen, Kunststoff oder dergleichen bestehen.The present invention relates to a device for the optional conversion-free application of hotmelt adhesives, in particular PUR adhesives, and dispersion adhesives, in particular PVAc adhesives, on flat objects, in particular plate-shaped components which at least partially made of wood, wood materials, plastic or the like.

Stand der TechnikState of the art

Im Bereich Flächenkaschieren in der Möbel- und Bauelementeindustrie sind Leimauftragsmaschinen bekannt, die Leim mit Hilfe von Walzen auf das Substrat auftragen. Derartige Maschinen sind bisher in ihrer Ausrüstung und konstruktiven Ausführung auf die zu verarbeitende Leimart spezialisiert. So gibt es Maschinen mit denen niedrigviskose Leime wie zum Beispiel Lösungsmittelkleber oder PVAc-Klebstoffe (Weißleime) aufgetragen werden können. Des Weiteren gibt es Leimauftragsmaschinen, die ausschließlich für das Auftragen von Schmelzklebstoffen (Hotmelts) geeignet sind.In the field of surface laminating in the furniture and component industry, glue application machines are known which apply glue to the substrate with the aid of rollers. Such machines are so far specialized in their equipment and structural design on the type of glue to be processed. Thus, there are machines with which low-viscosity glues such as solvent adhesive or PVAc adhesives (white glues) can be applied. Furthermore, there are glue application machines, which are only suitable for the application of hot melt adhesives (hotmelts).

Aus DE 20 2004 018 588 sind Kombinationsmaschinen bekannt, bei denen das Auftragen von unterschiedlicher Leimtypen durch das Auswechseln von Maschinenkomponenten (Kassettensystem) ermöglicht wird.Out DE 20 2004 018 588 Combination machines are known in which the application of different glue types by the replacement of machine components (cassette system) is made possible.

Aus der G 85 07 105.6 ist eine Leimauftragsmaschine mit den Merkmalen des Oberbegriffs des Anspruchs 1, bekannt, die es durch ein zu- und abschaltbares Leitungs- und Düsensystem ermöglicht, zwei unterschiedliche Schmelzklebstoffarten nebeneinander auf eine Materialbahn aufzutragen.From G 85 07 105.6 a glue application machine with the features of the preamble of claim 1, known, which allows it by an on and off switchable line and nozzle system, two different Apply hot melt adhesive types side by side on a web.

Es besteht daher der Wunsch, Anwender in der Möbel- und Bauelementeindustrie, die bisher hauptsächlich PVAc-Leime verwendet haben, in die Lage zu versetzen, ohne Neukauf einer spezialisierten Maschine auch PUR-Klebstoffe verarbeiten zu können.There is therefore a desire to enable users in the furniture and component industry, which have hitherto mainly used PVAc glues, to be able to process PUR adhesives without buying a new specialized machine.

Darstellung der ErfindungPresentation of the invention

Es ist daher Aufgabe der vorliegenden Erfindung eine Vorrichtung zum Auftragen von Klebstoffen zur Verfügung zu stellen, die es ermöglicht ohne Umrüsten wahlweise Schmelzklebstoffe, insbesondere PUR-Klebstoffe, und Dispersionsklebstoffe, insbesondere PVAc-Klebstoffe, auf flächige Gegenstände, insbesondere plattenförmige Bauteile, die zumindest abschnittsweise aus Holz, Holzwerkstoffen, Kunststoff oder dergleichen bestehen, aufzutragen.It is therefore an object of the present invention to provide a device for applying adhesives available, which allows without retooling either hot melt adhesives, especially polyurethane adhesives, and dispersion adhesives, especially PVAc adhesives, on flat objects, in particular plate-shaped components, at least in sections made of wood, wood materials, plastic or the like, apply.

Erfindungsgemäß wird diese Aufgabe durch eine Vorrichtung zum wahlweisen umrüstfreien Auftragen von Klebstoffen mit den Merkmalen des Patentanspruchs 1 gelöst. In den Unteransprüchen finden sich vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung.According to the invention, this object is achieved by a device for the optional conversion-free application of adhesives having the features of patent claim 1. In the subclaims there are advantageous embodiments and improvements of the invention.

Eine erfindungsgemäße Vorrichtung ist eingerichtet, wahlweise ohne ein erforderliches Umrüsten sowohl Schmelzklebstoffe, insbesondere PUR-Klebstoffe, und Dispersionsklebstoffe, insbesondere PVAc-Klebstoffe, auf flächige Gegenstände aufzutragen. Bevorzugt ist die Vorrichtung zum Klebstoffauftrag auf plattenförmige Bauteile, die zumindest abschnittsweise aus Holz, Holzwerkstoffen, Kunststoff oder dergleichen bestehen, vorgesehen. Der Begriff Klebstoff soll so verstanden werden, dass auch die Leime entsprechend der oben genannten Kategorien umfasst sein sollen.A device according to the invention is set up, optionally without hot-melt adhesives, in particular PUR adhesives, and dispersion adhesives, in particular PVAc adhesives, to be applied to flat objects without a necessary conversion. Preferably, the device for adhesive application to plate-shaped components, which consist at least partially of wood, wood materials, plastic or the like provided. The term adhesive should be understood to include the glues according to the above categories.

Die Vorrichtung weist wenigstens eine Auftragswalze zum Auftragen des Klebstoffs und wenigstens einer Dosierwalze zum Dosieren des Klebstoffs, die nebeneinander einen sich verjüngenden Spalt, in den der Klebstoff zugeführt wird, bildend angeordnet sind auf. Im Betrieb rotieren die Walzen, wobei der Klebstoff durch den Spalt zwischen den Walzen hindurch tritt. Der Abstand der Dosierwalze zur Auftragswalze definiert hierbei die Spaltbreite, die die Menge an Klebstoff begrenzt, die auf die Auftragswalze und von dieser auf das Werkstück appliziert wird. Eine größere Spaltbreite lässt mehr Klebstoff auf die Auftragswalze und damit auf das Werkstück gelangen.The apparatus comprises at least one applicator roll for applying the adhesive and at least one metering roller for metering the adhesive, which side by side forming a tapered gap, in which the adhesive is supplied, are arranged forming. In operation, the rollers rotate, with the adhesive passing through the nip between the rollers. The distance of the metering roller to the applicator roll defines the gap width, which limits the amount of adhesive that is applied to the applicator roll and from there to the workpiece. A larger gap width allows more adhesive to reach the applicator roll and thus the workpiece.

Erfindungsgemäß ist sowohl ein Leimvorrat für
Schmelzklebstoff als auch ein Leimvorrat für
Dispersionsklebstoff vorgesehen, die über ein Zuführsystem für Klebstoff mit dem Spalt verbunden sind. Dadurch, dass beide Klebstofftypen an der Vorrichtung bevorratet sind und dieser zugeführt werden können, ist es möglich, ohne ein Umrüsten wahlweise einen der Klebstoffe der Vorrichtung zuzuführen. Das Zuführsystem weist dazu entsprechende Zuführleitungen und Ventile auf, die ein wahlweises Zuführen einer Klebstoffsorte ohne ein Umrüsten ermöglichen.According to the invention, both a glue supply for
Hot melt adhesive as well as a glue supply for
Dispersion adhesive provided, which are connected via an adhesive feed system with the gap. Because both types of adhesives are stored on the device and can be supplied to it, it is possible to selectively supply one of the adhesives of the device without retooling. The supply system has corresponding supply lines and valves, which allow an optional supply of a type of adhesive without retooling.

Gemäß einer bevorzugten Weiterbildung weist die Auftragswalze eine äußere Beschichtung, insbesondere eine Gummierung, auf, die ein hineindiffundieren von Wasserbestandteilen des Dispersionsklebstoffs in die Auftragswalze verhindert. Dadurch kann die Auftragswalze auch aus Grundmaterialien hergestellt sein, in die die Dispersionsklebstoffe hineindiffundieren würden und die ohne Beschichtung nicht einsetzbar wären.According to a preferred embodiment, the applicator roll on an outer coating, in particular a rubber coating, which prevents diffusing inward of water components of the dispersion adhesive in the applicator roll. As a result, the applicator roll may also be made of base materials into which the dispersion adhesives would diffuse and which would not be usable without coating.

Gemäß einer bevorzugten Ausführungsform der Erfindung ist besonders bevorzugt die Dosierwalze oder bevorzugt auch die Auftragswalze wahlweise beheizbar. Dadurch können Schmelzklebstoffe auf die gewünschte Einsatztemperatur erwärmt werden. Ferner kann die viskosität der Klebstoffe über die Temperatur sehr gut an die Prozessparameter angepasst werden.According to a preferred embodiment of the invention, the metering roller or preferably also the applicator roller is particularly preferably heated. This allows hot melt adhesives to the desired operating temperature to be heated. Furthermore, the viscosity of the adhesives can be adapted very well to the process parameters via the temperature.

Gemäß einer bevorzugten Ausführungsform der Erfindung weist die Vorrichtung wenigstens eine Klebstoffabdichtung auf, die den Spalt zwischen Auftragswalze und Dosierwalze stirnseitig so abdichtet, dass der Klebstoff im sich verjüngenden Spalt weitgehend daran gehindert ist, in axialer Richtung der Walzen nach außen zu verlaufen. Bevorzugt sind zwei Klebstoffabdichtungen vorgesehen, die den Spalt beidseitig zu den Enden der Wellen in axialer Richtung der Wellen abdichten. Dadurch wird verhindert, dass sich der in den Spalt zugeführte Klebstoff, der sich dort wie in einer Art Rinne sammelt, zu den Enden der Walzen hin verläuft. Bevorzugt weist die Klebstoffabdichtung einzelne gegeneinander verschiebbare Segmente, insbesondere Kunststoffbacken, auf, die unter Druck dicht aneinander anliegen. Dadurch kann der Spalt, der im Profil aus den Bögen der Dosierwalze und Auftragswalze gebildet ist, besonders flexibel und genau ausgeführt werden, was eine hohe seitliche Dichtigkeit bewirkt.According to a preferred embodiment of the invention, the device has at least one adhesive seal which seals the end face between the applicator roller and the metering roller in such a way that the adhesive in the tapering gap is largely prevented from extending outward in the axial direction of the rollers. Preferably, two adhesive seals are provided, which seal the gap on both sides to the ends of the shafts in the axial direction of the waves. This prevents the adhesive fed into the nip, which collects there like in a kind of gutter, from running towards the ends of the rolls. Preferably, the adhesive seal on individual mutually displaceable segments, in particular plastic jaws, which bear tightly against each other under pressure. As a result, the gap, which is formed in the profile of the sheets of the metering roller and applicator roll, are made particularly flexible and accurate, which causes a high lateral tightness.

Gemäß einer bevorzugten Ausführungsform der Erfindung ist die Temperatur der Dosierwalze und/oder der Auftragswalze regelbar. Da verschiedene Klebstoffe flexibel eingesetzt werden sollen, bietet diese Ausführungsform den Vorteil, dass die Temperatur der jeweiligen Walze optimal an die Anforderungen hinsichtlich der Verarbeitungstemperatur des jeweiligen Klebstoffs angepasst werden kann.According to a preferred embodiment of the invention, the temperature of the metering roller and / or the applicator roll is controllable. Since various adhesives are to be used flexibly, this embodiment has the advantage that the temperature of the respective roller can be optimally adapted to the requirements with regard to the processing temperature of the particular adhesive.

Gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung sind zwei separate Klebstoffzuführungssysteme vorgesehen. Dadurch kann besonders einfach zwischen dem Einsatz der einzelnen Klebstoffsorten gewechselt werden, da ein Reinigen einer gemeinsamen Zuführleitung entfällt.In accordance with a preferred embodiment of the present invention, two separate adhesive delivery systems are provided. This makes it particularly easy to switch between the use of the individual types of adhesive, since a cleaning of a common supply line is eliminated.

Die Struktur der Gummierung der Auftragswalze verhindert ein hineindiffundieren von Wasserbestandteilen des Dispersionsklebstoffes. Da beim Klebstoffwechsel ohnehin eine gründliche Reinigung der Maschine erfolgen muss, ist kaum ein Übertrag von Feuchtigkeit in das PUR-Leimbad zu befürchten. Versuche haben gezeigt, dass die Beeinflussung nicht größer ist, als sie ohnehin durch die normal vorhandene Luftfeuchtigkeit auftritt. Daraus ableitend besteht die Erfindung darin, dass keine Maschinenkomponenten ausgetauscht werden müssen. Die Erfindung besteht des Weiteren aus der Ausrüstung der Dosierwalze mit einer abschaltbaren Heizung. Für die Verarbeitung von PUR Klebstoff wird das Leimbad vorteilhaft über die Dosierwalze permanent beheizt. Beim Wechsel auf die Verarbeitung von Dispersionsklebstoffen (PVAc) wird diese Heizung einfach abgeschaltet, da PVAc-Klebstoff kalt verarbeitet wird. Beim Wechsel zurück zur Verarbeitung von PUR bewirkt die Inbetriebnahme der Walzenheizung ein zusätzliches Verdampfen eventuell noch vorhandener Restfeuchtigkeit. Eine weitere Komponente der Erfindung ist die Ausstattung der Maschine mit zwei separaten Leimversorgungssystemen, eines für PUR-Klebstoffe und eines für Dispersionsklebstoffe.The structure of the applicator rubber coating prevents ingress of water constituents of the dispersion adhesive. As the adhesive change requires a thorough cleaning of the machine anyway, it is unlikely that moisture will be transferred to the PUR glue bath. Experiments have shown that the influence is not greater than it occurs anyway by the normal humidity present. Deriving from this, the invention consists in the fact that no machine components need to be replaced. The invention further consists of the equipment of the metering roller with a turn-off heating. For the processing of PUR adhesive, the glue bath is advantageously permanently heated via the metering roller. When switching to the processing of dispersion adhesives (PVAc), this heater is simply switched off as PVAc adhesive is processed cold. When changing back to the processing of PUR causes the commissioning of the roller heating an additional evaporation of any residual moisture remaining. Another component of the invention is the equipment of the machine with two separate glue supply systems, one for PUR adhesives and one for dispersion adhesives.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Die Erfindung wird im Folgenden anhand von
Ausführungsbeispielen unter Bezugnahme auf die beiliegenden Figuren der Zeichnung näher erläutert.The invention will be described below with reference to
Embodiments explained in more detail with reference to the accompanying figures of the drawing.

Von den Figuren zeigen:

Fig. 1
eine schematische perspektivische Teildarstellung einer erfindungsgemäßen Vorrichtung zum wahlweisen umrüstfreien Auftragen von Klebstoffen; und
Fig. 2
eine schematische perspektivische Darstellung einer erfindungsgemäßen Vorrichtung zum wahlweisen umrüstfreien Auftragen von Klebstoffen.
From the figures show:
Fig. 1
a schematic partial perspective view of a device according to the invention for the optional conversion-free application of adhesives; and
Fig. 2
a schematic perspective view of a device according to the invention for the optional conversion-free application of adhesives.

In den Figuren bezeichnen dieselben Bezugszeichen gleiche oder funktionsgleiche Komponenten, soweit nichts Gegenteiliges angegeben ist.In the figures, the same reference numerals designate the same or functionally identical components, unless indicated otherwise.

Ausführliche Beschreibung der bevorzugten AusführungsformenDetailed Description of the Preferred Embodiments

Fig. 1 zeigt eine schematische perspektivische Teildarstellung einer erfindungsgemäßen Vorrichtung 1 zum wahlweisen umrüstfreien Auftragen von Klebstoffen. Ein zu beschichtendes Werkstück 20 ist zwischen einer Auftragswalze 4 und einer Dosierwalze 6 auf der einen Seite und einer Gegendruckwalze 8 auf der anderen Seite angeordnet. Die Auftragswalze 4 ist so nahe neben der Dosierwalze 6 angeordnet, dass sie einen sich verjüngenden Spalt 7 bilden. In diesem Spalt 7 ist Klebstoff 30 angeordnet. Fig. 1 shows a schematic partial perspective view of a device 1 according to the invention for the optional conversion-free application of adhesives. A workpiece 20 to be coated is arranged between an application roller 4 and a metering roller 6 on one side and a counterpressure roller 8 on the other side. The application roller 4 is arranged so close to the metering roller 6 that they form a tapered gap 7. In this gap 7 adhesive 30 is arranged.

Im Betrieb wird das Werkstück 20 in der Vorschubrichtung V gefördert. Dabei rollt die Auftragswalze 4 auf dem Werkstück 20 ab. Klebstoff 30 wird dabei kontinuierlich dem Spalt 7 zugeführt. Der Klebstoff 30 gelangt in einer definierten Menge entsprechend der Spaltbreite durch den Spalt zwischen der Auftragswalze 4 und der Dosierwalze 6 auf den unteren Teil der Auftragswalze 4 und schließlich auf das Werkstück 20. Auf diese Weise wird das Werkstück 20 mit Klebstoff 30 beschichtet. Die Dosierwalze 6 ist bei diesem Ausführungsbeispiel beheizbar, um den Klebstoff 30 zu erwärmen. Ferner weist die Auftragswalze 4 eine äußere Beschichtung 5, hier eine Gummierung, auf, die ein hineindiffundieren von Wasserbestandteilen, bei der Verwendung von Dispersionsklebstoff 30, in die Auftragswalze 4 verhindert. Eine Klebstoffabdichtung 10 ist vorgesehen, die den Spalt 7 zwischen Auftragswalze 4 und Dosierwalze 6 stirnseitig so abdichtet, dass der Klebstoff 30 im sich verjüngenden Spalt 7 weitgehend daran gehindert ist, in axialer Richtung der Walzen 4, 6 nach außen zu verlaufen. Die Klebstoffabdichtung 10 besteht bei diesem Ausführungsbeispiel aus einzelnen gegeneinander verschiebbaren Segmenten 12, hier Kunststoffbacken, die unter Druck dicht aneinander anliegen. Die Zuführung des Klebstoffs 30 wird anhand von Figur 2 dargestellt.In operation, the workpiece 20 is conveyed in the feed direction V. In this case, the application roller 4 rolls on the workpiece 20. Adhesive 30 is continuously fed to the gap 7. The adhesive 30 passes in a defined amount corresponding to the nip width through the nip between the applicator roll 4 and the metering roller 6 on the lower part of the applicator roll 4 and finally on the workpiece 20. In this way, the workpiece 20 is coated with adhesive 30. The metering roller 6 is heatable in this embodiment, to heat the adhesive 30. Furthermore, the applicator roll 4 has an outer coating 5, here a gumming, which prevents the inward diffusion of water constituents into the applicator roll 4 when using dispersion adhesive 30. An adhesive seal 10 is provided which the gap 7 between applicator roller 4 and metering roller 6 so that the adhesive 30 is prevented in the tapered gap 7 largely from running in the axial direction of the rollers 4, 6 to the outside so as to seal the front side. The adhesive seal 10 consists in this embodiment of individual mutually displaceable segments 12, here plastic jaws which bear tightly against each other under pressure. The supply of the adhesive 30 is determined by FIG. 2 shown.

Fig. 2 zeigt eine schematische perspektivische Darstellung einer erfindungsgemäßen Vorrichtung 1 zum wahlweisen umrüstfreien Auftragen von Klebstoffen. Hier ist auch das Zuführsystem 37 für Klebstoff 30 dargestellt. Ein Vorrat für Schmelzklebstoff 36 ist über eine Zuführungsleitung für Schmelzklebstoff 39 mit dem Spalt 7 verbunden. Bei der Verwendung des Schmelzklebstoffvorrats 36 wird die Dosierwalze 6 beheizt um den Klebstoff 30 zu erwärmen. Wahlweise kann auch Klebstoff 30 aus dem
Dispersionsklebstoffvorrat 35 über die Zuführungsleitung für Dispersionsklebstoff 38 zugeführt werden. Eine Rückführungsleitung mit Filtersystem 40 für
Dispersionsklebstoff, insbesondere PVAc-Klebstoff, ist mit dem Vorrat für Dispersionsklebstoff 35 verbunden und dient der Rückführung und Aufbereitung des Klebstoffs. Bei Verwendung von Dispersionsklebstoff wird die Beheizung der Dosierwalze 6 bevorzugt abgeschaltet. Fig. 2 shows a schematic perspective view of a device 1 according to the invention for the optional conversion-free application of adhesives. Here also the delivery system 37 for adhesive 30 is shown. A supply of hot melt adhesive 36 is connected to the gap 7 via a hot melt adhesive feed line 39. When using the hot melt adhesive reservoir 36, the metering roller 6 is heated to heat the adhesive 30. Optionally, also adhesive 30 from the
Dispersion adhesive supply 35 are supplied via the supply line for dispersion adhesive 38. A return line with filter system 40 for
Dispersion adhesive, in particular PVAc adhesive, is connected to the supply of dispersion adhesive 35 and serves for the recycling and conditioning of the adhesive. When using dispersion adhesive, the heating of the metering roller 6 is preferably switched off.

Obwohl die vorliegende Erfindung anhand bevorzugter Ausführungsbeispiele vorliegend beschrieben wurde, ist sie darauf nicht beschränkt, sondern auf vielfältige Weise modifizierbar.Although the present invention has been described in terms of preferred embodiments herein, it is not limited thereto, but modifiable in a variety of ways.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Vorrichtungcontraption
44
Auftragswalzeapplicator roll
55
Beschichtungcoating
66
Dosierwalzemetering
77
Spaltgap
88th
GegendruckwalzeBacking roll
1010
Klebstoffabdichtungadhesive sealing
1212
Segmentsegment
2020
Werkstückworkpiece
3030
Klebstoffadhesive
3535
Vorrat für DispersionsklebstoffStock for dispersion adhesive
3636
Vorrat für SchmelzklebstoffStock for hot melt adhesive
3737
Zuführsystem für KlebstoffFeeding system for glue
3838
Zuführungsleitung für DispersionsklebstoffSupply line for dispersion adhesive
3939
Zuführungsleitung für SchmelzklebstoffFeed line for hot melt adhesive
4040
Rückführungsleitung mit Filtersystem für PVAc-KlebstoffReturn line with filter system for PVAc adhesive
VV
Vorschubrichtungfeed direction

Claims (10)

  1. Apparatus (1) for the optional application without conversion of hot-melt adhesives, in particular PUR adhesives, and dispersion adhesives, in particular PVAc adhesives, to two-dimensional objects (20), in particular board-like structural members, which in at least one section are made of wood, derived timber products, plastic or the like, wherein a glue supply (36) for hot-melt adhesive and a glue supply (35) for dispersion adhesive are provided, characterised by
    at least one applicator roller (4) for applying the adhesive (30) and at least one proportioning roller (6) for proportioning the adhesive (30), which are arranged adjacent to each other, forming a tapering gap (7) into which the adhesive (30) is fed, wherein the glue supply (36) for hot-melt adhesive and the glue supply (35) for dispersion adhesive are connected to the gap (7) via a feed system (37) for adhesive (30).
  2. Apparatus (1) according to claim 1, characterised in that the applicator roller (4) has an outer coating (5), in particular a rubber coating, which prevents water components of the dispersion adhesive (30) from diffusing into the applicator roller (4).
  3. Apparatus (1) according to claim 1 or 2, characterised in that the proportioning roller (6) and/or the applicator roller (4) is optionally heatable.
  4. Apparatus (1) according to any of the preceding claims, characterised in that a counterpressure roller (8) is provided in such a way that the workpiece (20) is passed through between the applicator roller (4) and the counterpressure roller (6) during application of the adhesive (30).
  5. Apparatus (1) according to any of the preceding claims, characterised in that the apparatus has at least one adhesive seal (10) which seals off the gap (7) between applicator roller (4) and proportioning roller (6) at the end faces in such a way that the adhesive (30) in the tapering gap (7) is to a large extent prevented from flowing to the outside in the axial direction of the rollers (4, 6).
  6. Apparatus (1) according to claim 5, characterised in that two adhesive seals (10) are provided, which seal off the gap (7) on both sides at the ends of the rollers (4, 6) in the axial direction of the rollers (4, 6).
  7. Apparatus (1) according to claim 6, characterised in that the adhesive seal (10) has individual segments (12) which are slidable relative to each other, in particular plastic jaws, which abut against each other sealingly under pressure.
  8. Apparatus (1) according to any of the preceding claims, characterised in that the temperature of the proportioning roller (6) and/or the applicator roller (4) can be regulated.
  9. Apparatus (1) according to any of the preceding claims, characterised in that the distance between the proportioning roller (6) and the applicator roller (4) is adjustable.
  10. Apparatus (1) according to any of the preceding claims, characterised in that two separate adhesive feed pipes (38, 39) are provided for the different adhesives.
EP10178285A 2010-09-22 2010-09-22 Device for selectively applying adhesive without the need for retrofitting Not-in-force EP2433717B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
ES10178285T ES2411129T3 (en) 2010-09-22 2010-09-22 Device for optional application without adhesive retrofitting
PL10178285T PL2433717T3 (en) 2010-09-22 2010-09-22 Device for selectively applying adhesive without the need for retrofitting
EP10178285A EP2433717B1 (en) 2010-09-22 2010-09-22 Device for selectively applying adhesive without the need for retrofitting
PCT/EP2011/066001 WO2012038316A1 (en) 2010-09-22 2011-09-15 Device for applying adhesives, optionally in a retrofit-free manner
CN201180007928.7A CN102740983B (en) 2010-09-22 2011-09-15 For the device of application of adhesive in the way of not reequiping alternatively
US13/582,023 US20120318193A1 (en) 2010-09-22 2011-09-15 Device for applying adhesives, optionally in a retrofit-free manner
RU2012131531/05A RU2571143C2 (en) 2010-09-22 2011-09-15 Device for selective non-changeover application of glues
HK12107318.6A HK1166753A1 (en) 2010-09-22 2012-07-25 Device for selectively applying adhesive without the need for retrofitting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10178285A EP2433717B1 (en) 2010-09-22 2010-09-22 Device for selectively applying adhesive without the need for retrofitting

Publications (2)

Publication Number Publication Date
EP2433717A1 EP2433717A1 (en) 2012-03-28
EP2433717B1 true EP2433717B1 (en) 2013-03-06

Family

ID=43502965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10178285A Not-in-force EP2433717B1 (en) 2010-09-22 2010-09-22 Device for selectively applying adhesive without the need for retrofitting

Country Status (8)

Country Link
US (1) US20120318193A1 (en)
EP (1) EP2433717B1 (en)
CN (1) CN102740983B (en)
ES (1) ES2411129T3 (en)
HK (1) HK1166753A1 (en)
PL (1) PL2433717T3 (en)
RU (1) RU2571143C2 (en)
WO (1) WO2012038316A1 (en)

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Also Published As

Publication number Publication date
HK1166753A1 (en) 2012-11-09
EP2433717A1 (en) 2012-03-28
RU2012131531A (en) 2014-01-27
CN102740983A (en) 2012-10-17
PL2433717T3 (en) 2013-08-30
CN102740983B (en) 2016-10-12
ES2411129T3 (en) 2013-07-04
US20120318193A1 (en) 2012-12-20
WO2012038316A1 (en) 2012-03-29
RU2571143C2 (en) 2015-12-20

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