EP0978321A2 - Device for applying adhesive on a web - Google Patents

Device for applying adhesive on a web Download PDF

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Publication number
EP0978321A2
EP0978321A2 EP99114562A EP99114562A EP0978321A2 EP 0978321 A2 EP0978321 A2 EP 0978321A2 EP 99114562 A EP99114562 A EP 99114562A EP 99114562 A EP99114562 A EP 99114562A EP 0978321 A2 EP0978321 A2 EP 0978321A2
Authority
EP
European Patent Office
Prior art keywords
glue
control device
level control
bead
web
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.)
Withdrawn
Application number
EP99114562A
Other languages
German (de)
French (fr)
Inventor
Karl-Heinz Pawelko
Franz Rottmann
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.)
Koerber Technologies GmbH
Original Assignee
Hauni Maschinenbau 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
Application filed by Hauni Maschinenbau GmbH filed Critical Hauni Maschinenbau GmbH
Publication of EP0978321A2 publication Critical patent/EP0978321A2/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • 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
    • B05C1/0834—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 the coating roller co-operating with other rollers, e.g. dosing, transfer rollers

Definitions

  • the invention relates to a device for gluing a strip-shaped web on a machine for producing wrapped by the web or web sections Objects, with two rotating in opposite directions, interacting along a surface line Glue rollers, in their inlet gusset a fillable and level-monitored Glue bead is formed.
  • a glue transfer roller serves as the strip-shaped web, which continuously removes the amount of glue required for gluing the web from the glue supply of the glue bead. Due to the permanent removal and appropriate filling of glue, the amount of glue in the glue bead always has the required defined viscosity during normal operation of the machine, which always guarantees perfect gluing and quality of the glue connection. Each shutdown of the gluing unit can cause more or less malfunctions depending on the duration of the business interruption. Therefore, after the machine has stopped, the glue unit is usually kept in operation, but without any actual glue consumption, although glue is permanently removed from the glue bead and returned to the glue bead on the roller surface, becoming more and more solid as a result of drying out and losing its adhesiveness .
  • the invention has for its object, even with longer interruptions in operation full operational readiness and glue quality of the production machine to get the glue unit.
  • a level control device which monitors the glue bead when the machine is at a standstill and a water supply unit which is activated when the amount of glue decreases.
  • reliable monitoring of the amount of glue within the glue bead is ensured in that the glue bead is maintained within a housing chamber which is connected to a glue supply and is provided with a swelling opening facing the level control device.
  • a level fluctuations that quickly and precisely detect further training consists in that the level control device has a distance sensor.
  • the glue volume of the glue bead, which decreases due to water evaporation, is most quickly replenished according to a further proposal in that the water supply unit is provided with an addition line aligned with the swelling opening of the housing chamber.
  • a precise volume compensation of the glue bead is ensured according to a further embodiment in that the metering line is connected to a pump which can be controlled by the level control device and is connected to a storage tank.
  • the level control device is expediently assigned a temperature sensor which is aligned with the glue roller surface and which, together with the level control device, is linked to a sensor indicating the dependence between the roller temperature and the water evaporation of the glue bead per unit of time.
  • the advantage achieved by the invention is that by evaporation resulting water loss of the glue is always compensated immediately, so that at any time after restarting the machine, the gluing with the desired glue viscosity can be continued and a consistently good Quality of the bond points is guaranteed.
  • the glue unit installed on a cigarette manufacturing machine has two glue rollers 2 and 3 rotating in a collecting box 1, which rotate in opposite directions in the direction of arrows 4 and 6 and form an inlet gusset 7 along a surface line.
  • a housing chamber 8 Extending above the inlet gusset 7 is a housing chamber 8, into which a glue feed hole 9 opens, which is connected in a manner not shown to a distributor housing 11 located above it.
  • the housing chamber 8 has a glue source opening 12.
  • a level control device 13 is assigned to the glue unit, which is provided with a distance sensor 14 aligned with the source opening 12, which has a signal link to a measuring transducer 16, which is also connected by a signal link to a temperature sensor 17 aligned with the roller surface of the glue roller 2.
  • the glue unit is also assigned a water supply unit 18, the feed line 22 of which can be fed from a storage tank 19 via a pump 21 via the distributor housing 11 in the vicinity of the source opening 12 above the roller surface of the glue roller 2.
  • the pump 21 can be controlled via a signal line 23, which is connected as an output line to a level fluctuation of a measuring transducer 25, which is formed via the glue supply bore 9 within the housing chamber 8 in the region of the source opening.
  • glue is permanently fed through the glue feed hole 9 into the inlet gusset or into the housing chamber 8, so that the glue bead 24 forms, from which glue is continuously removed by the glue roller 3 and transferred to a paper web 26 to be glued .
  • Glue which has not been removed is returned through the two glue rollers 2 and 3 into the glue bead 24.
  • the amount of the glue in the glue bead 24 is monitored by the level control device 13 in such a way that glue emerging from the glue source opening 12 is monitored by the distance sensor 14 and that glue is replenished via the glue feed hole if the glue level is outside the tolerated fluctuation range.
  • the glue unit is kept in operation to prevent the glue from drying out.
  • glue is continuously removed from the glue bead 24 and guided around on the roller surfaces of the glue rollers 2 and 3, the glue volume within the glue bead 24 decreases due to permanent water evaporation of the glue, so that there is a risk that the glue will increasingly solidify.
  • the inevitably decreasing glue level at the glue source opening 12 is determined by the distance sensor.
  • a dependency between the roller temperature and the water evaporation of the glue bead per unit of time is indicated by the level transmitter 16 and the temperature signals. If a leakage can be excluded from these measured values, a signal is triggered via the signal line 23 for activating the pump 21 when the level of the glue at the glue source opening 12 of the housing chamber 8 drops, which water from the storage tank 19 via the addition line 22 in the immediate vicinity the glue source opening 12 is placed on the roller surface of the glue roller 2, so that the viscosity of the glue within the glue bead 24 is maintained by the addition of evaporation to compensate for the evaporation. This ensures that the gluing unit is always fully operational when the machine is restarted.

Landscapes

  • Coating Apparatus (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)

Abstract

A device for gluing a strip-shaped path on a machine for making objects surrounded by the path or the path sections has two glue rollers rotating in opposition. The rollers work together along a surface line in whose inlet wedge a seam of glue is formed which can be filled up, and whose state-of-fill can be monitored. A level control device (13) monitors the bead of glue (24) during the machine's stationary state and a water supply aggregate (18) is activated with a decreasing amount of glue. The bead of glue is maintained inside a housing chamber (8) connected to a glue supply (22), which is provided with a source opening (12) facing the level-control device.

Description

Die Erfindung betrifft eine Vorrichtung zum Beleimen einer streifenförmigen Bahn auf einer Maschine um Herstellen von durch die Bahn bzw. Bahnabschnitte umhüllten Gegenständen, mit zwei gegensinnig rotierenden, entlang einer Mantellinie zusammenwirkenden Leimwalzen, in deren Einlaufzwickel ein auffüllbarer und füllstandsüberwachter Leimwulst gebildet wird.The invention relates to a device for gluing a strip-shaped web on a machine for producing wrapped by the web or web sections Objects, with two rotating in opposite directions, interacting along a surface line Glue rollers, in their inlet gusset a fillable and level-monitored Glue bead is formed.

Von den eingangs genannten Leimwalzen dient eine als die streifenförmige Bahn kontaktierende Leimübertragungswalze, welche die zur Beleimung der Bahn erforderliche Leimmenge kontinuierlich aus dem Leimvorrat des Leimwulstes entnimmt. Durch die permanente Entnahme und entsprechende Auffüllung von Leim hat die im Leimwulst befindliche Leimmenge während des Normalbetriebes der Maschine immer die erforderliche definierte Viskosität, welche stets eine einwandfreie Beleimung und Qualität der Leimverbindung gewährleistet.
Jede Stillsetzung des Leimwerks kann je nach der Dauer der Betriebsunterbrechung mehr oder weniger Störungen verursachen. Deshalb wird üblicherweise nach dem Anhalten der Maschine das Leimwerk weiter in Betrieb gehalten, allerdings ohne tatsächlichen Leimverbrauch, wobei jedoch permanent Leim aus dem Leimwulst entnommen und auf der Walzenoberfläche in den Leimwulst zurückgeführt wird und sich dabei durch Austrocknung mehr und mehr verfestigt und seine Klebfähigkeit verliert.Of the glue rollers mentioned in the introduction, a glue transfer roller serves as the strip-shaped web, which continuously removes the amount of glue required for gluing the web from the glue supply of the glue bead. Due to the permanent removal and appropriate filling of glue, the amount of glue in the glue bead always has the required defined viscosity during normal operation of the machine, which always guarantees perfect gluing and quality of the glue connection.
Each shutdown of the gluing unit can cause more or less malfunctions depending on the duration of the business interruption. Therefore, after the machine has stopped, the glue unit is usually kept in operation, but without any actual glue consumption, although glue is permanently removed from the glue bead and returned to the glue bead on the roller surface, becoming more and more solid as a result of drying out and losing its adhesiveness .

Der Erfindung liegt die Aufgabe zugrunde, auch bei längeren Betriebsunterbrechungen der Produktionsmaschine die volle Betriebsbereitschaft und Leimqualität des Leimwerks zu erhalten.The invention has for its object, even with longer interruptions in operation full operational readiness and glue quality of the production machine to get the glue unit.

Diese Aufgabe wird erfindungsgemäß gelöst durch eine während des Maschinenstillstands den Leimwulst überwachende Niveaukontrolleinrichtung und ein bei abnehmender Leimmenge aktiviertes Wasserzuführungsaggregat.
Eine zuverlässige Überwachung der Leimmenge innerhalb des Leimwulstes wird gemäß einer vorteilhaften Ausgestaltung dadurch gewährleistet, daß der Leimwulst innerhalb einer an eine Leimzuführung angeschlossenen Gehäusekammer aufrechterhalten wird, welche mit einer der Niveaukontrolleinrichtung zugekehrten Quellöffnung versehen ist.
Eine Niveauschwankungen schnell und exakt erfassende Weiterbildung besteht darin, daß die Niveaukontrolleinrichtung einen Abstandssensor aufweist.
Das durch Wasserverdunstung abnehmende Leimvolumen des Leimwulstes wird am schnellsten nach einem weiteren Vorschlag dadurch wieder aufgefüllt, daß das Wasserzuführungsaggregat mit einer auf die Quellöffnung der Gehäusekammer ausgerichteten Zugabeleitung versehen ist.
Ein präziser Volumenausgleich des Leimwulstes ist gemäß einer weiteren Ausgestaltung dadurch gewährleistet, daß die Zugabeleitung mit einer durch die Niveaukontrolleinrichtung ansteuerbaren, an einen Vorratstank angeschlossenen Pumpe verbunden ist.
Zweckmäßigerweise ist der Niveaukontrolleinrichtung ein auf die Leimwalzenoberfläche ausgerichteter Temperatursensor zugeordnet, der zusammen mit der Niveaukontrolleinrichtung mit einem eine Abhängigkeit zwischen der Walzentemperatur und der Wasserverdunstung des Leimwulstes pro Zeiteinheit anzeigenden Meßwertgeber verknüpft ist. Auf diese Weise wird sichergestellt, daß ausschließlich durch Verdunstung bedingter Wasserverlust des Leimwulsts durch Wasserzugabe ausgeglichen wird und nicht infolge einer Leimleckage aus der Wulstkammer ausgetretener Leim durch den Leim in dem Leimwulst zunehmend verdünnendes Wasser ersetzt wird.This object is achieved according to the invention by means of a level control device which monitors the glue bead when the machine is at a standstill and a water supply unit which is activated when the amount of glue decreases.
According to an advantageous embodiment, reliable monitoring of the amount of glue within the glue bead is ensured in that the glue bead is maintained within a housing chamber which is connected to a glue supply and is provided with a swelling opening facing the level control device.
A level fluctuations that quickly and precisely detect further training consists in that the level control device has a distance sensor.
The glue volume of the glue bead, which decreases due to water evaporation, is most quickly replenished according to a further proposal in that the water supply unit is provided with an addition line aligned with the swelling opening of the housing chamber.
A precise volume compensation of the glue bead is ensured according to a further embodiment in that the metering line is connected to a pump which can be controlled by the level control device and is connected to a storage tank.
The level control device is expediently assigned a temperature sensor which is aligned with the glue roller surface and which, together with the level control device, is linked to a sensor indicating the dependence between the roller temperature and the water evaporation of the glue bead per unit of time. In this way it is ensured that water loss of the glue bead caused by evaporation is compensated for by water addition and that glue escaping from the bead chamber due to glue leakage is not replaced by the glue in the glue bead increasingly diluting water.

Der mit der Erfindung erzielte Vorteil besteht darin, daß der durch Verdunstung entstehende Wasserverlust des Leimes immer sofort ausgeglichen wird, so daß jederzeit nach einer Wiederinbetriebnahme der Maschine die Beleimung mit der gewünschten Leimviskosität fortgesetzt werden kann und eine gleichbleibend gute Qualität der Klebstellen gewährleistet ist.The advantage achieved by the invention is that by evaporation resulting water loss of the glue is always compensated immediately, so that at any time after restarting the machine, the gluing with the desired glue viscosity can be continued and a consistently good Quality of the bond points is guaranteed.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert.The invention is described below using an exemplary embodiment shown in the drawing explained in more detail.

In der Zeichnung ist ein Leimaggregat zur Beleimung eines Umhüllungsstreifens für stabförmige Rauchartikel dargestellt.In the drawing is a glue unit for gluing a wrapping strip for rod-shaped smoking article shown.

Das auf einer nicht weiter dargestellten Herstellungsmaschine für Zigaretten installierte Leimaggregat weist zwei in einem Auffangkasten 1 rotierende Leimwalzen 2 und 3 auf, die in Richtung der Pfeile 4 und 6 gegensinnig rotieren und entlang einer Mantellinie einen Einlaufzwickel 7 bilden. Über dem Einlaufzwickel 7 erstreckt sich eine Gehäusekammer 8, in die eine Leimzuführungsbohrung 9 einmündet, welche auf nicht weiter dargestellte Weise an ein darüber befindliches Verteilergehäuse 11 angeschlossen ist. Darüber hinaus weist die Gehäusekammer 8 eine Leimquellöffnung 12 auf.
Dem Leimwerk ist eine Niveaukontrolleinrichtung 13 zugeordnet, die mit einem auf die Quellöffnung 12 ausgerichteten Abstandssensor 14 versehen ist, welcher eine Signalverknüpfung zu einem Meßwertgeber 16 aufweist, der außerdem durch Signalverknüpfung mit einem auf die Walzenoberfläche der Leimwalze 2 ausgerichteten Temperatursensor 17 verbunden ist.
Dem Leimwerk ist außerdem ein Wasserzuführungsaggregat 18 zugeordnet, dessen aus einem Vorratstank 19 über eine Pumpe 21 beschickbare Zugabeleitung 22 über das Verteilergehäuse 11 in der Nähe der Quellöffnung 12 über der Walzenoberfläche der Leimwalze 2 mündet. Die Pumpe 21 ist über eine Signalleitung 23 ansteuerbar, die als Ausgangsleitung mit einem Niveauschwankungen eines über die Leimzuführungsbohrung 9 innerhalb der Gehäusekammer 8 gebildeten Leimwulstes 24 im Bereich der Quellöffnung registrierenden Meßwertgeber 25 verbunden ist.The glue unit installed on a cigarette manufacturing machine, not shown, has two glue rollers 2 and 3 rotating in a collecting box 1, which rotate in opposite directions in the direction of arrows 4 and 6 and form an inlet gusset 7 along a surface line. Extending above the inlet gusset 7 is a housing chamber 8, into which a glue feed hole 9 opens, which is connected in a manner not shown to a distributor housing 11 located above it. In addition, the housing chamber 8 has a glue source opening 12.
A level control device 13 is assigned to the glue unit, which is provided with a distance sensor 14 aligned with the source opening 12, which has a signal link to a measuring transducer 16, which is also connected by a signal link to a temperature sensor 17 aligned with the roller surface of the glue roller 2.
The glue unit is also assigned a water supply unit 18, the feed line 22 of which can be fed from a storage tank 19 via a pump 21 via the distributor housing 11 in the vicinity of the source opening 12 above the roller surface of the glue roller 2. The pump 21 can be controlled via a signal line 23, which is connected as an output line to a level fluctuation of a measuring transducer 25, which is formed via the glue supply bore 9 within the housing chamber 8 in the region of the source opening.

Im normalen Produktionsablauf bei laufender Maschine wird permanent Leim über die Leimzuführungsbohrung 9 in den Einlaufzwickel bzw. in die Gehäusekammer 8 zugeführt, so daß sich der Leimwulst 24 bildet, aus dem kontinuierlich Leim durch die Leimwalze 3 entnommen und auf eine zu beleimende Papierbahn 26 übertragen wird. Dabei nicht abgenommener Leim wird durch die beiden Leimwalzen 2 und 3 in den Leimwulst 24 zurückgeführt. Die Menge des im Leimwulst 24 befindlichen Leims wird durch die Niveaukontrolleinrichtung 13 derart überwacht, daß aus der Leimquellöffnung 12 austretender Leim durch den Abstandssensor 14 überwacht und daß bei außerhalb der tolerierten Schwankungsbreite des Leimniveaus über die Leimzuführungsbohrung Leim nachgefüllt wird.
Falls die Maschine beispielsweise wegen einer Störung zeitweise angehalten werden muß, wird das Leimwerk weiterhin in Betrieb gehalten, um ein Eintrocknen des Leims zu verhindern. Da jedoch laufend Leim aus dem Leimwulst 24 entnommen und auf der Walzenoberflächen der Leimwalzen 2 und 3 herumgeführt wird, nimmt das Leimvolumen innerhalb des Leimwulstes 24 durch permanente Wasserverdunstung des Leims ab, so daß die Gefahr besteht, daß der Leim sich zunehmend verfestigt. Um dies zu vermeiden, wird das dabei zwangsläufig abnehmende Leimniveau an der Leimquellöffnung 12 durch den Abstandssensor festgestellt. Damit ein etwaiger verdunstungsunabhängiger bzw. leckagebedingter Leimverlust zu keiner Verfälschung des verdunstungsbedingten Niveausignals führt, wird durch den die Niveausignale und die Temperatursignale verrechnenden Meßwertgeber 16 eine Abhängigkeit zwischen der Walzentemperatur und der Wasserverdunstung des Leimwulstes pro Zeiteinheit angezeigt. Wenn aus diesen Meßwerten eine Leckage ausgeschlossen werden kann, wird bei registriertem sinkenden Pegelstand des Leims an der Leimquellöffnung 12 der Gehäusekammer 8 ein Signal über die Signalleitung 23 zur Aktivierung der Pumpe 21 ausgelöst, welche Wasser aus dem Vorratstank 19 über die Zugabeleitung 22 in unmittelbarer Nähe der Leimquellöffnung 12 auf die Walzenoberfläche der Leimwalze 2 gegeben, so daß durch die die Verdunstung ausgleichende Wasserzugabe die Viskosität des Leims innerhalb des Leimwulstes 24 aufrechterhalten wird. Damit ist bei Wiederinbetriebnahme der Maschine jederzeit die volle Betriebsbereitschaft des Leimwerks garantiert.In the normal production process with the machine running, glue is permanently fed through the glue feed hole 9 into the inlet gusset or into the housing chamber 8, so that the glue bead 24 forms, from which glue is continuously removed by the glue roller 3 and transferred to a paper web 26 to be glued . Glue which has not been removed is returned through the two glue rollers 2 and 3 into the glue bead 24. The amount of the glue in the glue bead 24 is monitored by the level control device 13 in such a way that glue emerging from the glue source opening 12 is monitored by the distance sensor 14 and that glue is replenished via the glue feed hole if the glue level is outside the tolerated fluctuation range.
If, for example, the machine has to be stopped temporarily due to a malfunction, the glue unit is kept in operation to prevent the glue from drying out. However, since glue is continuously removed from the glue bead 24 and guided around on the roller surfaces of the glue rollers 2 and 3, the glue volume within the glue bead 24 decreases due to permanent water evaporation of the glue, so that there is a risk that the glue will increasingly solidify. To avoid this, the inevitably decreasing glue level at the glue source opening 12 is determined by the distance sensor. So that any evaporation-independent or leakage-related glue loss does not lead to falsification of the evaporation-related level signal, a dependency between the roller temperature and the water evaporation of the glue bead per unit of time is indicated by the level transmitter 16 and the temperature signals. If a leakage can be excluded from these measured values, a signal is triggered via the signal line 23 for activating the pump 21 when the level of the glue at the glue source opening 12 of the housing chamber 8 drops, which water from the storage tank 19 via the addition line 22 in the immediate vicinity the glue source opening 12 is placed on the roller surface of the glue roller 2, so that the viscosity of the glue within the glue bead 24 is maintained by the addition of evaporation to compensate for the evaporation. This ensures that the gluing unit is always fully operational when the machine is restarted.

Claims (6)

Vorrichtung zum Beleimen einer streifenförmigen Bahn auf einer Maschine zum Herstellen von durch die Bahn bzw. die Bahnabschnitte umhüllten Gegenständen, mit zwei gegensinnig rotierenden, entlang einer Mantellinie zusammenwirkenden Leimwalzen, in deren Einlaufzwickel ein auffüllbarer und füllstandsüberwachter Leimwulst gebildet wird, gekennzeichnet durch eine während des Maschinenstillstands den Leimwulst (24) überwachende Niveaukontrolleinrichtung (13) und ein bei abnehmender Leimmenge aktiviertes Wasserzuführungsaggregat (18).Device for gluing a strip-shaped web on a machine for the production of objects encased by the web or the web sections, with two counter-rotating, interacting along a surface line Glue rollers, in the inlet gusset of which a fillable and fill level monitor Glue bead is formed, characterized by a during machine downtime the glue bead (24) monitoring level control device (13) and with decreasing amount of glue activated water supply unit (18). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Leimwulst (24) innerhalb einer an eine Leimzuführung (22) angeschlossenen Gehäusekammer (8) aufrechterhalten wird, welche mit einer der Niveaukontrolleinrichtung (13) zugekehrten Quellöffnung (12) versehen ist.Device according to claim 1, characterized in that the glue bead (24) within a housing chamber connected to a glue supply (22) (8) is maintained, which facing the level control device (13) Swell opening (12) is provided. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Niveaukontrolleinrichtung (13) einen Abstandssensor (14) aufweist.Device according to claim 1 or 2, characterized in that the Level control device (13) has a distance sensor (14). Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Wasserzuführungsaggregat (18) mit einer auf die Quellöffnung (12) der Gehäusekammer (8) ausgerichteten Zugabeleitung (22) versehen ist.Device according to one of claims 1 to 3, characterized in that that the water supply unit (18) with one on the source opening (12) Housing chamber (8) aligned feed line (22) is provided. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Zugabeleitung (22) mit einer durch die Niveaukontrolleinrichtung (13) ansteuerbaren, an einen Vorratstank (19) angeschlossenen Pumpe (21) verbunden ist.Device according to claim 4, characterized in that the addition line (22) with one that can be controlled by the level control device (13) Storage tank (19) connected pump (21) is connected. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Niveaukontrolleinrichtung (13) ein auf die Leimwalzenoberfläche ausgerichteter Temperatursensor (17) zugeordnet ist, der zusammen mit der Niveaukontrolleinrichtung mit einem eine Abhängigkeit zwischen der Walzentemperatur und der Wasserverdunstung des Leimwulstes (24) pro Zeiteinheit anzeigenden Meßwertgeber (16) verknüpft ist.Device according to one of claims 1 to 5, characterized in that that the level control device (13) is aligned with the glue roller surface Temperature sensor (17) is assigned, which together with the level control device with a dependency between the roll temperature and the water evaporation of the glue bead (24) per unit of time indicating the transmitter (16) is linked.
EP99114562A 1998-08-06 1999-07-24 Device for applying adhesive on a web Withdrawn EP0978321A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19835532A DE19835532A1 (en) 1998-08-06 1998-08-06 Device for gluing a strip-shaped web
DE19835532 1998-08-06

Publications (1)

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EP0978321A2 true EP0978321A2 (en) 2000-02-09

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EP99114562A Withdrawn EP0978321A2 (en) 1998-08-06 1999-07-24 Device for applying adhesive on a web

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US (1) US6258168B1 (en)
EP (1) EP0978321A2 (en)
JP (1) JP2000051759A (en)
CN (1) CN1247776A (en)
DE (1) DE19835532A1 (en)
PL (1) PL334745A1 (en)

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Also Published As

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PL334745A1 (en) 2000-02-14
CN1247776A (en) 2000-03-22
DE19835532A1 (en) 2000-02-10
JP2000051759A (en) 2000-02-22
US6258168B1 (en) 2001-07-10

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