EP2559519B1 - Method and device for removing contamination from surfaces of draw rollers that interact with one another - Google Patents

Method and device for removing contamination from surfaces of draw rollers that interact with one another Download PDF

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Publication number
EP2559519B1
EP2559519B1 EP12179397.0A EP12179397A EP2559519B1 EP 2559519 B1 EP2559519 B1 EP 2559519B1 EP 12179397 A EP12179397 A EP 12179397A EP 2559519 B1 EP2559519 B1 EP 2559519B1
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EP
European Patent Office
Prior art keywords
dry ice
stretching
ice particles
carrier gas
roller
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EP12179397.0A
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German (de)
French (fr)
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EP2559519A1 (en
Inventor
Marcus Schönbeck
Jürgen Weitkamp
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Nitto Advanced Film Gronau GmbH
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Mondi Gronau GmbH
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Priority to PL12179397T priority Critical patent/PL2559519T3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
    • B24C3/04—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other stationary

Definitions

  • the invention relates to a method and apparatus for removing contaminants on surfaces of intermeshing draw rolls, the surfaces having elevations and depressions for expanding a resilient laminate passed through a nip between the draw rolls, and wherein the laminate is stretched in the nip transversely of the web direction.
  • EP 1 321 288 B1 describes a method for producing an elastic laminate in which a material web is stretched in the transverse direction by means of two intermeshing draw rolls.
  • layers of a nonwoven web also referred to as nonwoven
  • an elastomeric layer can be made into a laminate which is elastically extensible in a transverse direction stretch region defined by the stretch.
  • the process according to the invention relates to the cleaning of the surfaces of draw rolls which have elevations and depressions for stretching the laminate. These may be, for example, profile disks and grooves.
  • the drafting rollers interlock. In this case, an increase of a draw roller engages in a recess of the other draw roll.
  • the object of the invention is to provide a method and an apparatus for cleaning the surface of intermeshing draw rolls, in which the production plant does not have to be stopped and the contaminants are reliably removed during the ongoing drawing process.
  • dry ice particles are blown onto the surface of at least one draw roll during the current drawing process, and soiling removed from the profile surface of the draw roll and excess dry ice are sucked off.
  • Dry ice is solid carbon dioxide which, under normal conditions, sublimes at -78.48 ° C, ie it goes directly into the gas phase without first melting.
  • the impinging on the surface of the draw roll dry ice particles lead to a sudden supercooling of the dirt. Since the deposits have a different coefficient of thermal expansion than the roll surface, thermal stresses occur which lead to microcracking in the dirt layer. Crushed dry ice particles penetrate into the microcracks and sublimate. The sudden volume increase in the sublimation, the pollution of detached from the surface. The dissolved dirt and excess dry ice are sucked off.
  • WO 2007/105746 A1 describes a casting roll with a smooth surface to which a liquid polymer composition is applied. The polymer film is then peeled off the roller. The smooth surface of the casting roller is cleaned by blowing on dry ice particles.
  • the dry ice blasting technique becomes an ongoing incremental stretching process for activation integrated elastic laminate and thereby used for cleaning of intermeshing, rotating draw rolls.
  • the productivity is considerably increased by the integration of a cleaning unit in the production plant. Since the articles made by the use of the stretching process are mass-produced articles, such as elastic tapes for baby diapers, this leads to a considerable saving in operating costs.
  • the dry ice particles are inflated by means of nozzles on the surface.
  • each draw roll is associated with at least one nozzle.
  • the dry ice particles are preferably blown onto the surface by means of a nozzle, which is moved past the elevations and depressions by a traversing adjusting movement parallel to the axis of rotation of the draw roll .
  • the nozzle may be connected to a moving assembly associated with a controller adapted to periodically eject the nozzles at a predetermined rate Move speed along the surface and thereby inflate dry ice particles.
  • in another variant of the invention provides a plurality of nozzles, which are arranged side by side, parallel to the axis of rotation of each draw roll, for a uniform distribution of the dry ice particles.
  • the angle at which the dry ice particles impinge on the surface can also be varied by means of a movement arrangement.
  • the control device can control this process so that while the nozzle moves parallel to the axis of rotation of the draw roll, at the same time the discharge angle of the nozzle is varied.
  • the distance between the nozzle and the surface can be varied by means of a moving arrangement.
  • a suction arrangement which generates a negative pressure and is preferably arranged behind the nozzles, with respect to the direction of rotation of the draw rolls.
  • the dry ice particles are blown onto the surfaces of the draw rolls by means of a carrier gas stream.
  • a carrier gas stream In particular, air is suitable as the carrier gas stream.
  • an inert gas may be used as a carrier gas, such as nitrogen or carbon dioxide.
  • the carrier gas flow is generated by means of a conveying device, for example a blower.
  • a conveying device for example a blower.
  • the dry ice particles can be added to the carrier gas stream in different ways.
  • the dry ice particles are already in pellet form and are conveyed by means of the carrier gas stream from a container.
  • liquid carbon dioxide can also be metered into the carrier gas stream.
  • the dry ice particles form in the carrier gas stream.
  • the formation of the dry ice particles takes place in the nozzles.
  • Fig. 1 shows a scheme for the production of an elastic laminate, in which first a film strip 1 of an elastomeric polymer with two layers of nonwoven 2 are joined together after application of an adhesive 3 in a laminating unit 4. Subsequently, the material web 5 is stretched by a drafting unit 6.
  • the drafting unit 6 comprises two intermeshing drafting rolls 7.
  • each draw roll 7 is associated with a nozzle 8 and an exhaust assembly 11.
  • the draw rolls 7 include ridges 13 and depressions 14 extending around the entire circumference of the rolls.
  • the elevations 13 are formed as profile disks between which groove-shaped recesses remain.
  • the elevations 13 of one draw roll 7 mesh with the depressions 14 of the other draw roll.
  • an elevation 13 of a draw roller 7 engages in a recess 14 of the other draw roll 7 and vice versa.
  • a stretching unit 6 is therefore also referred to as a CD stretching unit (CD: cross direction).
  • Dry ice particles 9 are blown onto the surfaces of the draw rolls 7 through nozzles 8.
  • Each nozzle 8 can be moved by means of a moving assembly 15 parallel to the axis of rotation 12 of the respective stretching roller 7.
  • the moving assembly 15 is connected to a control device (not shown) in connection, which moves the nozzle parallel to the axis of rotation 12 at certain time intervals with a stored in the control device travel speed.
  • the removed contaminants are removed by suction arrangements 11 and therefore do not disturb the production operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Laminated Bodies (AREA)

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Entfernung von Verschmutzungen auf Oberflächen ineinander greifender Streckwalzen, wobei die Oberflächen zur Dehnung eines durch einen Walzenspalt zwischen den Streckwalzen geführten elastischen Laminats Erhöhungen und Vertiefungen aufweisen und wobei das Laminat im Walzenspalt quer zur Bahnrichtung verstreckt wird.The invention relates to a method and apparatus for removing contaminants on surfaces of intermeshing draw rolls, the surfaces having elevations and depressions for expanding a resilient laminate passed through a nip between the draw rolls, and wherein the laminate is stretched in the nip transversely of the web direction.

In der EP 1 321 288 B1 wird ein Verfahren zur Herstellung eines elastischen Laminats beschrieben, bei dem mittels zwei ineinander greifenden Streckwalzen eine Materialbahn in Querrichtung gedehnt wird. Durch das Dehnen kann aus Schichten eines nichtgewebten Vlieses, das auch als Nonwoven bezeichnet wird, und einer elastomeren Schicht ein Laminat hergestellt werden, welches in einem durch die Verstreckung bestimmten Dehnungsbereich in Querrichtung elastisch dehnbar ist.In the EP 1 321 288 B1 describes a method for producing an elastic laminate in which a material web is stretched in the transverse direction by means of two intermeshing draw rolls. By stretching, layers of a nonwoven web, also referred to as nonwoven, and an elastomeric layer can be made into a laminate which is elastically extensible in a transverse direction stretch region defined by the stretch.

Das erfindungsgemäße Verfahren betrifft die Reinigung der Oberflächen von Streckwalzen, die zur Dehnung des Laminats Erhöhungen und Vertiefungen aufweisen. Dabei kann es sich beispielsweise um Profilscheiben und Rillen handeln. Die Streckwalzen greifen ineinander. Dabei greift eine Erhöhung der einen Streckwalze in eine Vertiefung der anderen Streckwalze.The process according to the invention relates to the cleaning of the surfaces of draw rolls which have elevations and depressions for stretching the laminate. These may be, for example, profile disks and grooves. The drafting rollers interlock. In this case, an increase of a draw roller engages in a recess of the other draw roll.

Beim Streckprozess kommt es zur Ablagerung von Verschmutzungen auf der Oberfläche der Streckwalzen. Dabei handelt es sich unter anderem um Faser- oder Kleberablagerungen, welche den Streckprozess behindern und auch die Materialbahn beschädigen oder zumindest verunreinigen können. Um diese Ablagerungen zu entfernen, ist es notwendig, die Anlage anzuhalten und mechanisch zu reinigen. Durch den Stillstand der Anlage geht wertvolle Produktionszeit verloren. Zudem fallen Personalkosten für den Reinigungsvorgang an.During the stretching process, dirt accumulates on the surface of the draw rolls. Among other things, these are fiber or adhesive deposits, which impede the stretching process and can also damage or at least contaminate the material web. To remove these deposits, it is necessary to stop the plant and mechanically to clean. Due to the shutdown of the system valuable production time is lost. In addition, personnel costs incurred for the cleaning process.

Aufgabe der Erfindung ist es, ein Verfahren sowie eine Vorrichtung zur Reinigung der Oberfläche von ineinander greifenden Streckwalzen anzugeben, bei dem die Produktionsanlage nicht angehalten werden muss und die Verschmutzungen zuverlässig während des laufenden Streckprozess entfernt werden.The object of the invention is to provide a method and an apparatus for cleaning the surface of intermeshing draw rolls, in which the production plant does not have to be stopped and the contaminants are reliably removed during the ongoing drawing process.

Gegenstand der Erfindung und Lösung dieser Aufgabe ist ein Verfahren nach Anspruch 1 sowie eine Vorrichtung nach Anspruch 6. Bevorzugte Ausgestaltungen des Verfahrens sowie der Vorrichtung sind in den Unteransprüchen beschrieben.The invention and solution of this problem is a method according to claim 1 and an apparatus according to claim 6. Preferred embodiments of the method and the device are described in the subclaims.

Erfindungsgemäß werden während des laufenden Streckprozesses Trockeneispartikel auf die Oberfläche mindestens einer Streckwalze geblasen und werden von der Profilfläche der Streckwalze abgelöste Verschmutzungen sowie überschüssiges Trockeneis abgesaugt.According to the invention, dry ice particles are blown onto the surface of at least one draw roll during the current drawing process, and soiling removed from the profile surface of the draw roll and excess dry ice are sucked off.

Bei Trockeneis handelt es sich um festes Kohlendioxid, das unter Normalbedingungen bei -78,48 °C sublimiert, also direkt in die Gasphase übergeht, ohne vorher zu schmelzen. Die auf der Oberfläche der Streckwalze auftreffenden Trockeneispartikel führen zu einer schlagartigen Unterkühlung der Verschmutzungen. Da die Ablagerungen einen anderen Wärmeausdehnungskoeffizienten haben als die Walzenoberfläche, entstehen thermische Spannungen, die zu einer Mikrorissbildung in der Schmutzschicht führen. Zerkleinerte Trockeneispartikel dringen in die Mikrorisse ein und sublimieren. Durch die schlagartige Volumenvergrößerung bei der Sublimation werden die Verschmutzungen von der Oberfläche abgelöst. Die gelösten Verschmutzungen und überschüssiges Trockeneis werden abgesaugt.Dry ice is solid carbon dioxide which, under normal conditions, sublimes at -78.48 ° C, ie it goes directly into the gas phase without first melting. The impinging on the surface of the draw roll dry ice particles lead to a sudden supercooling of the dirt. Since the deposits have a different coefficient of thermal expansion than the roll surface, thermal stresses occur which lead to microcracking in the dirt layer. Crushed dry ice particles penetrate into the microcracks and sublimate. The sudden volume increase in the sublimation, the pollution of detached from the surface. The dissolved dirt and excess dry ice are sucked off.

Generell sind Reinigungsprozesse mittels Trockeneispartikeln seit vielen Jahrzehnten bekannt. So sind beispielsweise spezielle mobile Geräte erhältlich, die zum Trockeneisstrahlen eingesetzt werden. Dabei handelt es sich um ein Druckluftstrahlverfahren, bei dem als Strahlmittel Trockeneis eingesetzt wird.In general, cleaning processes using dry ice particles have been known for many decades. For example, special mobile devices are available that are used for dry ice blasting. This is a compressed air blast process, in which dry ice is used as blasting medium.

Darüber hinaus wird in der WO 2007/105746 A1 eine Casting-Walze mit einer glatten Oberfläche beschrieben, auf die eine flüssige Polymermasse aufgebracht wird. Der Polymerfilm wird anschließend von der Walze abgelöst. Eine Reinigung der glatten Oberfläche der Casting-Walze erfolgt durch Aufblasen von Trockeneispartikeln.In addition, in the WO 2007/105746 A1 describes a casting roll with a smooth surface to which a liquid polymer composition is applied. The polymer film is then peeled off the roller. The smooth surface of the casting roller is cleaned by blowing on dry ice particles.

In der JP 7186048 wird Trockeneisstrahlen zur Reinigung von Garnfilament-Transportrollen eingesetzt und die WO 2010/107543 A2 beschreibt das Entfernen von Kleberresten auf Releaselinem durch abrasive Partikel, wobei auch Trockeneispartikel eingesetzt werden.In the JP 7186048 dry ice blasting is used to clean yarn filament transport rollers and the WO 2010/107543 A2 describes the removal of adhesive residues on release liners by abrasive particles, whereby dry ice particles are also used.

Aus DE 10 2009 043 033 A1 ist es bekannt, Rollen und Walzen in Gießanlagen, Walzwerken oder Bandprozesslinien für Metallbänder mittels Trockeneis zu reinigen. Die Reinigung kann bei laufendem Rollen- oder Walzbetrieb durchgeführt werden. Die dazu eingesetzte Vorrichtung wird mit einem minimalen Abstand an die zylindrische Oberfläche der zu reinigenden Walzen oder Rollen positioniert und entlang des Walzen- oder Rollenkörpers verschoben. Für profilierte Streckwalzen ist die Vorrichtung nicht geeignet.Out DE 10 2009 043 033 A1 It is known to clean rollers and rollers in casting plants, rolling mills or belt processing lines for metal belts by means of dry ice. Cleaning can be done while the reel or roller is running. The device used for this purpose is positioned with a minimum distance to the cylindrical surface of the rollers or rollers to be cleaned and moved along the roller or roller body. For profiled stretching rollers, the device is not suitable.

Bei dem erfindungsgemäßen Verfahren wird die Technik des Trockeneisstrahlens in einen laufenden inkrementalen Stretchingprozess zur Aktivierung eines elastischen Laminats integriert und dabei zur Reinigung von ineinander greifenden, rotierenden Streckwalzen angewendet. Dies stellt einen erheblichen technischen Fortschritt gegenüber Streckverfahren nach dem Stand der Technik dar, da die Produktionsanlage nicht mehr für Reinigungsphasen angehalten werden muss. Die Produktivität wird durch die Integration einer Reinigungseinheit in die Produktionsanlage erheblich gesteigert. Da es sich bei den durch Anwendung des Streckprozesses hergestellten Artikeln um Massenartikel, wie beispielsweise elastische Tapes für Babywindeln, handelt, führt dies zu einer erheblichen Einsparung an Betriebskosten.In the method according to the invention, the dry ice blasting technique becomes an ongoing incremental stretching process for activation integrated elastic laminate and thereby used for cleaning of intermeshing, rotating draw rolls. This represents a significant technical advance over prior art stretching methods because the production line no longer needs to be stopped for cleaning phases. The productivity is considerably increased by the integration of a cleaning unit in the production plant. Since the articles made by the use of the stretching process are mass-produced articles, such as elastic tapes for baby diapers, this leads to a considerable saving in operating costs.

Überraschenderweise führt das Aufblasen von Trockeneispartikeln zu sehr guten Reinigungseffekten der Streckwalzen, obwohl deren Oberflächen stark profiliert sind. Dies ist erstaunlich, da die dominant ausgebildeten Erhöhungen und Vertiefungen eine gleichmäßige Verteilung der Trockeneispartikel auf der Oberfläche erschweren. Eine Anwendung des Trockeneisstrahlens von stark profilierten Oberflächen während eines laufenden Produktionsbetriebes ist bisher nicht in Betracht gezogen worden.Surprisingly, the inflation of dry ice particles leads to very good cleaning effects of the draw rolls, although their surfaces are highly profiled. This is surprising, since the domes and depressions that are dominated make it difficult to evenly distribute the dry ice particles on the surface. An application of dry ice blasting of highly profiled surfaces during an ongoing production operation has hitherto not been considered.

Die Trockeneispartikel werden mittels Düsen auf die Oberfläche aufgeblasen. Vorzugsweise ist jeder Streckwalze mindestens eine Düse zugeordnet. Um trotz der Erhöhungen und Vertiefungen eine möglichst gleichmäßige Verteilung der Trockeneispartikel auf der Oberfläche der Streckwalzen zu erreichen, werden die Trockeneispartikel vorzugsweise mittels einer Düse auf die Oberfläche geblasen, die mit einer traversierenden Stellbewegung parallel zur Drehachse der Streckwalze an den Erhöhungen und Vertiefungen vorbei bewegt wird. Die Düse kann an eine Bewegungsanordnung angeschlossen werden, die mit einer Steuereinrichtung in Verbindung steht, die dazu eingerichtet ist, in periodischen Abständen die Düsen mit einer vorgegebenen Geschwindigkeit entlang der Oberfläche zu verschieben und dabei Trockeneispartikel aufzublasen.The dry ice particles are inflated by means of nozzles on the surface. Preferably, each draw roll is associated with at least one nozzle. In order to achieve the most even distribution of the dry ice particles on the surface of the draw rolls despite the elevations and depressions, the dry ice particles are preferably blown onto the surface by means of a nozzle, which is moved past the elevations and depressions by a traversing adjusting movement parallel to the axis of rotation of the draw roll , The nozzle may be connected to a moving assembly associated with a controller adapted to periodically eject the nozzles at a predetermined rate Move speed along the surface and thereby inflate dry ice particles.

Bei einer anderen Variante der Erfindung sorgt eine Vielzahl von Düsen, die nebeneinander, parallel zur Drehachse jeder Streckwalze angeordnet sind, für eine gleichmäßige Verteilung der Trockeneispartikel.In another variant of the invention provides a plurality of nozzles, which are arranged side by side, parallel to the axis of rotation of each draw roll, for a uniform distribution of the dry ice particles.

Als besonders vorteilhaft erweist es sich, wenn durch eine Beweganordnung auch der Winkel, unter dem die Trockeneispartikel auf die Oberfläche auftreffen, variiert werden kann. Die Steuereinrichtung kann diesen Vorgang so steuern, dass während die Düse parallel zur Drehachse der Streckwalze verfährt, gleichzeitig der Ausblaswinkel der Düse variiert wird.It proves to be particularly advantageous if the angle at which the dry ice particles impinge on the surface can also be varied by means of a movement arrangement. The control device can control this process so that while the nozzle moves parallel to the axis of rotation of the draw roll, at the same time the discharge angle of the nozzle is varied.

Zudem erweist es sich als vorteilhaft, wenn der Abstand zwischen Düse und Oberfläche mittels einer Beweganordnung variierbar ist.In addition, it proves to be advantageous if the distance between the nozzle and the surface can be varied by means of a moving arrangement.

Zum Absaugen der von der Profilfläche der Streckwalzen gelösten Verunreinigungen kann eine Absauganordnung eingesetzt werden, die einen Unterdruck erzeugt und vorzugsweise hinter den Düsen, in Bezug auf die Rotationsrichtung der Streckwalzen, angeordnet ist. Durch das Absaugen der entfernten Verschmutzungen und des gasförmigen Kohlendioxids bzw. restlicher, noch nicht sublimierter Trockeneispartikel, wird eine Beeinträchtigung des Streckprozesses und folglich auch des Fertigungsprozesses bei der Herstellung aktivierter elastischer Materialbahnen vermieden.For sucking off the impurities dissolved by the profile surface of the draw rolls, it is possible to use a suction arrangement which generates a negative pressure and is preferably arranged behind the nozzles, with respect to the direction of rotation of the draw rolls. By sucking off the removed contaminants and the gaseous carbon dioxide or residual, not yet sublimated dry ice particles, an impairment of the stretching process and consequently of the manufacturing process in the production of activated elastic material webs is avoided.

Die Trockeneispartikel werden mittels eines Trägergasstroms auf die Oberflächen der Streckwalzen geblasen. Dabei eignet sich insbesondere Luft als Trägergasstrom. Bei bestimmten Anwendungen kann auch ein Inertgas als Trägergas eingesetzt werden, wie beispielsweise Stickstoff oder Kohlendioxid.The dry ice particles are blown onto the surfaces of the draw rolls by means of a carrier gas stream. In particular, air is suitable as the carrier gas stream. In certain applications, an inert gas may be used as a carrier gas, such as nitrogen or carbon dioxide.

Der Trägergasstrom wird mittels einer Fördereinrichtung, beispielsweise eines Gebläses erzeugt. Die Trockeneispartikel können dem Trägergasstrom auf unterschiedliche Weise beigemischt werden.The carrier gas flow is generated by means of a conveying device, for example a blower. The dry ice particles can be added to the carrier gas stream in different ways.

Bei einer Variante liegen die Trockeneispartikel bereits in Pelletform vor und werden mittels des Trägergasstroms aus einem Behältnis gefördert. Alternativ oder ergänzend kann auch flüssiges Kohlendioxid in den Trägergasstrom dosiert werden. Bei dieser Variante bilden sich die Trockeneispartikel in dem Trägergasstrom. Vorzugsweise erfolgt die Bildung der Trockeneispartikel in den Düsen.In one variant, the dry ice particles are already in pellet form and are conveyed by means of the carrier gas stream from a container. Alternatively or additionally, liquid carbon dioxide can also be metered into the carrier gas stream. In this variant, the dry ice particles form in the carrier gas stream. Preferably, the formation of the dry ice particles takes place in the nozzles.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der Beschreibung von Ausführungsbeispielen anhand von Zeichnungen. Es zeigen

Fig. 1
ein Schema zur Herstellung eines Folienlaminats unter Anwendung eines inkrementalen Streckprozesses mit integrierter Trockeneisreinigung,
Fig. 2
eine perspektivische Darstellung zweier ineinander greifender Streckwalzen mit integrierter Trockeneisreinigung.
Further features and advantages of the invention will become apparent from the description of embodiments with reference to drawings. Show it
Fig. 1
a schematic for producing a film laminate using an incremental stretching process with integrated dry ice cleaning,
Fig. 2
a perspective view of two intermeshing draw rolls with integrated dry ice cleaning.

Fig. 1 zeigt ein Schema zur Herstellung eines elastischen Laminats, bei dem zunächst ein Folienstreifen 1 aus einem elastomeren Polymer mit zwei Schichten Nonwoven 2 nach Aufbringen eines Klebers 3 in einem Kaschierwerk 4 zusammengefügt werden. Anschließend erfolgt eine Streckung der Materialbahn 5 durch eine Streckeinheit 6. Die Streckeinheit 6 umfasst zwei ineinander greifende Streckwalzen 7. Fig. 1 shows a scheme for the production of an elastic laminate, in which first a film strip 1 of an elastomeric polymer with two layers of nonwoven 2 are joined together after application of an adhesive 3 in a laminating unit 4. Subsequently, the material web 5 is stretched by a drafting unit 6. The drafting unit 6 comprises two intermeshing drafting rolls 7.

Mittels zweier Düsen 8 werden Trockeneispartikel 9 von einem Trägergasstrom 10 auf die Oberflächen der Streckwalzen 7 geblasen. Die gelösten Verschmutzungen werden mittels einer Absauganordnung 11 abgezogen. Jeder Streckwalze 7 ist eine Düse 8 und eine Absauganordnung 11 zugeordnet.By means of two nozzles 8 dry ice particles 9 are blown by a carrier gas stream 10 on the surfaces of the drafting rollers 7. The dissolved contaminants are removed by means of a suction 11. Each draw roll 7 is associated with a nozzle 8 and an exhaust assembly 11.

In Fig. 2 sind zwei Streckwalzen 7 perspektivisch dargestellt. Die Streckwalzen 7 umfassen Erhöhungen 13 und Vertiefungen 14, die sich um den gesamten Umfang der Walzen erstrecken. Im Ausführungsbeispiel sind die Erhöhungen 13 als Profilscheiben ausgebildet zwischen denen rillenförmige Vertiefungen verbleiben. Die Erhöhungen 13 der einen Streckwalze 7 kämmen mit den Vertiefungen 14 der anderen Streckwalze. Dabei greift jeweils eine Erhöhung 13 der einen Streckwalze 7 in eine Vertiefung 14 der anderen Streckwalze 7 und umgekehrt.In Fig. 2 two drafting rollers 7 are shown in perspective. The draw rolls 7 include ridges 13 and depressions 14 extending around the entire circumference of the rolls. In the exemplary embodiment, the elevations 13 are formed as profile disks between which groove-shaped recesses remain. The elevations 13 of one draw roll 7 mesh with the depressions 14 of the other draw roll. In each case, an elevation 13 of a draw roller 7 engages in a recess 14 of the other draw roll 7 and vice versa.

In Fig. 2 ist aus Gründen einer vereinfachten Darstellung nur die Düse 8 und die Absauganordnung 11 der oberen Streckwalze 7 darstellt. Die Verstreckung des Laminats erfolgt quer zur Bahnrichtung. Eine solche Streckeinheit 6 wird daher auch als CD-Streckeinheit (CD: cross direction, Querrichtung) bezeichnet.In Fig. 2 For reasons of a simplified illustration, only the nozzle 8 and the suction arrangement 11 of the upper draw roller 7 are shown. The stretching of the laminate is transverse to the web direction. Such a stretching unit 6 is therefore also referred to as a CD stretching unit (CD: cross direction).

Durch Düsen 8 werden Trockeneispartikel 9 auf die Oberflächen der Streckwalzen 7 geblasen. Jede Düse 8 kann mittels einer Beweganordnung 15 parallel zur Drehachse 12 der jeweiligen Streckwalze 7 verschoben werden. Die Beweganordnung 15 steht mit einer Steuereinrichtung (nicht dargestellt) in Verbindung, welche die Düse in bestimmten Zeitabständen mit einer in der Steuereinrichtung hinterlegten Verfahrgeschwindigkeit parallel zur Drehachse 12 verfährt. Die entfernten Verschmutzungen werden durch Absauganordnungen 11 abgezogen und stören daher nicht den Produktionsbetrieb.Dry ice particles 9 are blown onto the surfaces of the draw rolls 7 through nozzles 8. Each nozzle 8 can be moved by means of a moving assembly 15 parallel to the axis of rotation 12 of the respective stretching roller 7. The moving assembly 15 is connected to a control device (not shown) in connection, which moves the nozzle parallel to the axis of rotation 12 at certain time intervals with a stored in the control device travel speed. The removed contaminants are removed by suction arrangements 11 and therefore do not disturb the production operation.

Claims (10)

  1. A method for removing impurities from surfaces of meshing stretching rollers (7), wherein the surfaces for stretching an elastic laminate (5), which is guided through a roller nip between the stretching rollers (7), comprise protuberances (13) and indentations (14), and wherein the laminate (5) is stretched in the roller nip transversely to the web direction, characterised in that, while stretching is in progress, dry ice particles (9) are blown onto the surface of at least one stretching roller (7) and in that impurities which have become detached from the profiled surface of the stretching roller (7) and excess dry ice are removed by suction.
  2. The method according to claim 1, characterised in that the dry ice particles (9) are blown onto the surface by at least one nozzle (8) which is moved past the protuberances (13) and indentations (14) of the stretching roller (7) with a traversing positioning motion parallel to the rotary axis (12) of the stretching roller (7).
  3. The method according to claim 1 or 2, characterised in that the dry ice particles (9) are blown onto the surface by means of a carrier gas current.
  4. The method according to claim 3, characterised in that at least a partial current of the carrier gas current conveys the dry ice particles (9) out of a receptacle.
  5. The method according to claim 3 or 4, characterised in that liquid carbon dioxide is metered into the carrier gas current and the dry ice particles (9) are formed in the carrier gas current.
  6. An arrangement for carrying out the method according to one of claims 1 to 5 with meshing stretching rollers (7) for stretching an elastic material web (5) transversely to the web direction, which stretching rollers comprise protuberances (13) and indentations (14), and with a device for removing impurities from surfaces of the stretching rollers (7), characterised by
    a) a nozzle (8) through which dry ice particles (9) can be blown onto the profile surface of at least one stretching roller (7) while stretching is in progress, and
    b) an exhausting arrangement (11) for removing detached impurities and excess dry ice.
  7. The arrangement according to claim 6, characterised in that each stretching roller (7) has a nozzle (8) associated with it.
  8. The arrangement according to claim 6 or 7, characterised in that the nozzle (8) is connected with a motion arrangement, wherein the motion arrangement (15) is in communication with a control device which is arranged to vary the position of the nozzle (8) parallel to the rotary axis (12) of the stretching roller (7).
  9. The arrangement according to one of claims 6 to 8, characterised by a conveying device for generating a carrier gas current which transports the dry ice particles (9).
  10. The arrangement according to claim 9, characterised in that a metering device is provided for metering liquid carbon dioxide into the carrier gas current, with dry ice particles (9) being formed in the carrier gas current.
EP12179397.0A 2011-08-17 2012-08-06 Method and device for removing contamination from surfaces of draw rollers that interact with one another Not-in-force EP2559519B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12179397T PL2559519T3 (en) 2011-08-17 2012-08-06 Method and device for removing contamination from surfaces of draw rollers that interact with one another

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011052771A DE102011052771A1 (en) 2011-08-17 2011-08-17 Method and device for removing soiling on profiled surfaces of intermeshing draw rolls

Publications (2)

Publication Number Publication Date
EP2559519A1 EP2559519A1 (en) 2013-02-20
EP2559519B1 true EP2559519B1 (en) 2014-12-03

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EP12179397.0A Not-in-force EP2559519B1 (en) 2011-08-17 2012-08-06 Method and device for removing contamination from surfaces of draw rollers that interact with one another

Country Status (7)

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US (1) US20130206175A1 (en)
EP (1) EP2559519B1 (en)
JP (1) JP2013039560A (en)
CN (1) CN103056781B (en)
DE (1) DE102011052771A1 (en)
ES (1) ES2527832T3 (en)
PL (1) PL2559519T3 (en)

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DE202014105542U1 (en) * 2014-11-18 2016-02-19 Krones Aktiengesellschaft labeling
JP6811537B2 (en) * 2016-02-19 2021-01-13 住友化学株式会社 Expander device, porous film manufacturing device, and porous film manufacturing method
MX2022006954A (en) * 2019-12-12 2022-07-12 Nippon Steel Corp Device for removing foreign matter from roller surface, method for removing foreign matter from roller surface, and method for manufacturing steel strip.
CN111439022B (en) * 2020-04-21 2021-01-15 马鞍山奥卡包装科技有限公司 Printed matter preparation laminating machine

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Also Published As

Publication number Publication date
ES2527832T3 (en) 2015-01-30
EP2559519A1 (en) 2013-02-20
CN103056781A (en) 2013-04-24
JP2013039560A (en) 2013-02-28
DE102011052771A1 (en) 2013-02-21
US20130206175A1 (en) 2013-08-15
CN103056781B (en) 2017-06-30
PL2559519T3 (en) 2015-07-31

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