EP0999991B1 - Winding method, device for separating a web and web winder - Google Patents

Winding method, device for separating a web and web winder Download PDF

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Publication number
EP0999991B1
EP0999991B1 EP98929372A EP98929372A EP0999991B1 EP 0999991 B1 EP0999991 B1 EP 0999991B1 EP 98929372 A EP98929372 A EP 98929372A EP 98929372 A EP98929372 A EP 98929372A EP 0999991 B1 EP0999991 B1 EP 0999991B1
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EP
European Patent Office
Prior art keywords
winding
web
mandrel
roller
winding mandrel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98929372A
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German (de)
French (fr)
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EP0999991A1 (en
Inventor
Gottlieb Looser
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.)
Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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Publication of EP0999991A1 publication Critical patent/EP0999991A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/26—Cutting-off the web running to the wound web roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/41419—Starting winding process
    • B65H2301/41426—Starting winding process involving suction means, e.g. core with vacuum supply

Definitions

  • the invention relates to a method for winding continuously running material web on a sequence of winding sleeves, a device for cutting the web at Changing the winding tubes, a web winding device and one Application of the procedure.
  • Web winders and web winding processes are different Known embodiments and e.g. in DE-A-2 243 504, EP-A-0 017 277, EP-A-0 394 197 and CH-A-683 992 as well as the one therein Described prior art documents.
  • the well-known winders that a relatively fast-running and more or less endless web of plastic film, Paper, textile goods or another, relatively thin (typically 10 to 1000 ⁇ m thick) and flexible material with Working widths of up to a few meters either in the course of the Production or processing of the web material continuous, i.e. without interrupting the material flow, must be wound on a sequence of winding spools that be fed to the winder from a winding spool magazine.
  • a common disadvantage of the known methods and devices is a more or less strong jerk during the wiggling process, the adverse effects on upstream, i.e. upstream manufacturing, processing or upgrading units can lead.
  • the object of the invention is to provide a winding method offer that the above disadvantages not or at most to a negligible extent.
  • the object of the invention is also an improved cutting device and a new web winder.
  • Preferred embodiments of the invention Process have those defined in claims 2 to 8 Characteristics.
  • the invention further relates to a new separation device having the features of claim 9, preferred Embodiments of this device have the features of Have claims 10-11.
  • the invention also relates to a device for Implementation of the new procedure with the characteristics of Claim 12 and in a preferred embodiment the features of claim 13.
  • DE-A-195 42 096 describes a device with comparable structure, the one used for winding Air flow but from a slot nozzle as an inject flow in the Proximity of the inflow area, i.e. in contrast to present invention with a local overpressure, is caused.
  • the invention also relates to the application of the new method for winding practically endless Sheets or strips of plastic film in the course of the Production or processing of the film.
  • winding contact means one sufficient for winding a fresh winding tube Contact between the sleeve and the by separating the new front end.
  • the speed of the air flow is preferred at least twice, especially at least three times and e.g. six times higher than the speed of typical web running speeds from 30 - 400 meters / minute or more continuously running material web.
  • Each winding roller is therefore both of the previous finished wrap as well as that of the fresh one subsequent winding connected to a central drive, the can be controlled so that the one acting on the web Tension can be kept at a desired value and is not dependent on the thickness of the respective roll.
  • the left and one of on the right side of the winder are controlled so that the left and one of on the right side of the winder.
  • the arcuate air flow is through a near the contact line between the winding roller and the this adjacent winding tube acting negative pressure, e.g. of -450 to -900 millibars.
  • the process is the formation of the arcuate Airflow supported by side inflows caused by the Pressure difference between the negative pressure applied and the ambient pressure or an atmospheric pressure from a Overpressure source are generated.
  • the material web be actuated the separator about half the circumference of the Winding sleeve bears against this.
  • the material web with the help of an inside of Vacuum roll applied negative pressure on the with openings of the roll shell provided to hold the winding roll. Further can strengthen the contact of the material web with the Winding sleeve inside the winding sleeve provided with openings a negative pressure can be applied.
  • the separating device according to the invention for a device for winding a continuously running material web on a sequence of winding cores is characterized that the separator is practically the length the winding tube has an extending vacuum channel, the with a the winding tube by at least a quarter of its circumference arcuate guide wall and a serrated knife is connected to that formed when the separation device is actuated front end of the running material web under the action an arcuate airflow that is at least about a quarter of the sleeve circumference at least approximately the width of the winding tube and up to the contact line between the winding roller and the adjacent winding tube, to bring in winding contact with the winding tube.
  • the separation device with a device for Swinging the knife into the path of the material web between a fresh winding tube lying against the winding roller and a movable guide roller, which is in a position close to the Winding sleeve is brought connected.
  • the inventive device for winding a continuously running material web on a sequence of winding sleeves has a winding roller, at least one movable one Deflection roller and a device for severing the material web, around this one onto a preceding full winding sleeve ascending web end and one for winding the following to form an empty winding tube specific end of web, and is characterized in that the separating device has a extending over the length of the winding tubes Has a vacuum channel with one around the winding tube encompassing at least a quarter of its circumference in an arc shape Guide wall and a serrated knife is connected to this when actuated the separator formed front end of the current Material web under the action of an arcuate Airflow that is at least about a quarter of the sleeve circumference at least approximately over the width of the winding tube and close to the line of contact between the winding roller and the adjacent winding tube extends with the winding tube bring in winding contact.
  • the winding roller (21) preferably has one with a Coat provided with a rubber pad, e.g. made of steel, and perforations, to by means of one prevailing inside the winding roller Vacuum an adjacent material web in reinforced To keep in touch and a practically smooth start-up operation to enable.
  • a rubber pad e.g. made of steel
  • the invention also relates to the application the new separation process for winding practically endless Sheets or strips of plastic film in the course of manufacture the film, e.g. by extrusion, or processing, e.g. by cutting, printing or other processing of the webs.
  • the term "practically endless” used here refers on web or tape lengths that are in relation to the Path or bandwidth are very large, e.g. at least around that Factor 1000 greater.
  • Suitable plastic films are those with Thicknesses in the range of typically between 5 and 1000 ⁇ m from the known polymers, copolymers, graft polymers, polymer mixtures with film-forming molecular weights included the additives common for film production and processing.
  • FIG. 1 shows the separation and winding process a device 15 in five stages (I - V). It has to be stressed that this subdivision is only for explanation and the process is actually ongoing.
  • the material web running over a winding roller 11 B e.g. a film web coming from an extruder made of plastic, a paper or textile material web, shown, on the adjacent, almost full web of material 12 wound around the preceding winding tube 14 becomes.
  • the almost full wrap 12 is usually on the side of one referred to as a "winding station" pivotable pair Arms 120 (only the front one is shown in Fig. 1) in one desired position and with desired or in known Wise (see e.g. the two European pantomexts mentioned above) controlled contact pressure on the winding roller 11 held.
  • 120 is not critical to the present invention can be different, e.g. as a controlled movable carriage with vertical support.
  • An empty fresh winding tube 16 with (not shown) Guide mandrel is made from a (not shown) Magazine of conventional design supplied and a guide roller 18 is from their rest position towards the film web B. the winding 12 out.
  • the deflection roller 18 comes in Contact with the film web B on the film wrap 12 during at the same time an empty winding tube 16 using a (for better overview, not shown) usual pair of swivel arms (referred to as the "winding station") towards Gap between the winding roller 11 and the film roll 12 out until the deflection roller 18 abuts the film roll 12.
  • a winding station usual pair of swivel arms
  • the foil wrapper 12 is pivoted (or method) of the winding station 120 from the winding roller 11 removed while the empty winding tube 16 and the guide roller 18 to be moved to the position in stage IV of the scheme of Figure 1, i.e. the deflection roller 18 on the film roll 12 is present and for this after termination of the contact serves with the winding roller 11 as a contact roller, and preferably in a position above that before termination the contact existing contact line between the winding roller 11 and the film wrap 12.
  • the web B continues in stage IV on the film wrap 12, but with the detour around empty winding tube 16 and the deflection roller 18th
  • the front end of the subsequent material web section embossed on the empty winding tube 16 thus the (not shown) central drive with the winding tube 16 is engaged, the winding process adjusted wrap can exercise.
  • the exact operating parameters Contact pressure at the gap between web winding and Winding roller; Tension and running speed
  • FIG. 2 schematically and in detail shows a winding device 25 with a separating device 20 according to the invention, which has been guided in the manner described in FIG. 1 into the path of the material web B between the winding roller 21 and the movable deflection roller 28.
  • the separating device 20 is provided with a knife 201 which is designed as a serrated knife in a manner which is not shown but is known per se and which extends at least over the entire width of the material web B.
  • the arcuate air flow L arises from the fact that by means of one curved and at least over the whole Width of the material web B extending guide or guide wall 203 and the adjacent surface of the winding tube 26 an arcuate space is formed, of which the winding roller 21 adjacent end is connected to a vacuum channel 200.
  • the channel 200 can be a housing connected to the knife 201 be that of the guide wall 203, the near the winding roller 21st extending wall 204, rear wall 205 and top wall 206 is formed.
  • the channel 200 has a slot shape over the Channel width extending opening 209 that the air flow L generated.
  • a baffle 27 can serve the path of the air flow L to lead close to the winding roller 21.
  • the side ends (not shown) of the vacuum channel are closed or with a vacuum source, e.g. one pressurized boiler (not shown) connected, which runs continuously with correspondingly powerful pumps is evacuated.
  • a vacuum source e.g. one pressurized boiler (not shown) connected, which runs continuously with correspondingly powerful pumps is evacuated.
  • the winding roller 21 has, according to a preferred embodiment of the invention when applied to airtight Web materials, such as plastic films in particular or relatively dense papers, a hollow interior 210, also with a vacuum source (not shown) is connected and the usually around 180 ° of the circumference of the winding roller 21 on this adjacent material web B on e.g. from a rubber layer 212 existing surface of the winding roller on the jacket wall 211 21 holds.
  • This measure has the particular advantage of Avoidance of jerky effects on the material web in the area between the winding roller 21 and an upstream side Area of the material web, e.g. in connection with the production of plastic films by extrusion or the like
  • Procedure is sensitive to jerky loads, such as uncontrolled stretching or sagging resulting tension in the web or by stretching caused differences in orientation or strength.
  • Fig. 2 the winding tube 26 is as on a solid Core mandrel 261 shown guided. But it is within the Invention, also inside the winding tube 26, a negative pressure to generate the over-the-dashed channels 263 acts on the adjacent material web and sucks it up.
  • Fig. 3 shows a modification of the in Fig. 2 schematically shown separator: this is the vacuum channel 300 from a hollow body, e.g. a tube 39, formed the a slot-shaped opening 309 for sucking in the air flow L. has.
  • the connection with the knife 301 can be arbitrary, e.g. in the form of a simple connecting plate or bracket be formed, provided only the arcuate guide wall 303 remains.
  • Features of the separator 30 - namely the vacuum channel 300, the arcuate guide wall 303 and so on connected knife 301 - with walls 304, 305 and 306 be a hollow body, optionally with the atmosphere connected or under increased pressure.
  • the geometry is preferably all essential to the invention Parts of a separation device according to the invention - i.e. in the embodiment of the shown in Figures 2 and 3 Baffle 203,303, the knife 201, 301 and the vacuum channel 200,300 - designed so that the arcuate airflow L at least 90 °, preferably at least 120 ° and in particular comprises at least 140 ° of the circumference of the winding tube and the until the moment the web is separated from the winding tube Material web the winding tube at least to about 180 ° of yours Scope includes.
  • a device according to the invention is instead of a Serrated knife 201,301 a known cross cutting device, e.g. according to DE-A-2 243 504, used with the housing 20.30 is connected and leads to an oblique cut.
  • a known cross cutting device e.g. according to DE-A-2 243 504
  • the invention can thus also be an oblique cut wrapped on a fresh tube at the beginning of a film section without using the familiar tools to tackle (Gluing or / and electrostatic adhesion) are used Need to become.
  • the separating device according to the invention enables a Comparison to the prior art simple construction as well offers simple yet safe operation and thus offers a number of other advantages: so the separating device-apart mostly made of steel, hard material or ceramic Knives - made of light metal, so the moving mass is comparatively small. It can Swinging in and out in the usual way with pneumatic or hydraulic actuators are effected.
  • the inventive Separating device can not only in new plants but also existing systems to replace the known ones Separators are installed.

Abstract

A method is disclosed for winding a continuous web of material on a core mandrel, the winder comprising a cutter that actuates to provide a new end of web material. The cutter itself comprises a source of vacuum for creating an airflow around a new core mandrel between the mandrel and a guide wall which extends around at least one fourth of the mandrel surface, the airflow causing the new web end to follow the mandrel around and tuck said new end between the mandrel circumference and the tensioned web extending between the new mandrel and upstream equipment.

Description

Die Erfindung betrifft ein Verfahren zum Anwickeln einer kontinuierlich laufenden Materialbahn auf eine Folge von Wikkelhülsen, eine Vorrichtung zum Durchtrennen der Bahn beim Wechseln der Wickelhülsen, eine Bahnwickelvorrichtung und eine Anwendung des Verfahrens.The invention relates to a method for winding continuously running material web on a sequence of winding sleeves, a device for cutting the web at Changing the winding tubes, a web winding device and one Application of the procedure.

Bahnwickler und Bahnwickelverfahren sind in verschiedenen Ausführungsformen bekannt und z.B. in DE-A-2 243 504, EP-A-0 017 277, EP-A-0 394 197 und CH-A-683 992 sowie dem in diesen Dokumenten genannten Stand der Technik beschrieben. Gemeinsam ist den bekannten Wicklern, dass eine relativ rasch laufende und mehr oder weniger endlose Materialbahn aus Kunststoffolie, Papier, textilem Gut oder einem anderen, verhältnismässig dünnen (typisch 10 bis 1000 µm Dicke) und flexiblen Material mit Arbeitsbreiten von bis zu einigen Metern entweder im Zuge der Herstellung des Bahnmaterials oder bei dessen Verarbeitung kontinuierlich, d.h. ohne Unterbrechung des Materialflusses, auf eine Folge von Wickelspulen aufgewickelt werden muss, die dem Wickler aus einem Wickelspulenmagazin zugeführt werden.Web winders and web winding processes are different Known embodiments and e.g. in DE-A-2 243 504, EP-A-0 017 277, EP-A-0 394 197 and CH-A-683 992 as well as the one therein Described prior art documents. Together is the well-known winders that a relatively fast-running and more or less endless web of plastic film, Paper, textile goods or another, relatively thin (typically 10 to 1000 µm thick) and flexible material with Working widths of up to a few meters either in the course of the Production or processing of the web material continuous, i.e. without interrupting the material flow, must be wound on a sequence of winding spools that be fed to the winder from a winding spool magazine.

Hierbei sind insbesondere zwei Probleme zu lösen, nämlich einerseits einen sehr raschen, sauberen und präzisen Trenn- bzw. Schnittvorgang zu bewirken und andererseits das Vorderende eines neuen Bahnabschnitts in Wickelkontakt mit einer frischen, d.h. leeren Wickelhülse zu bringen. Ein annähernd rechtwinkliger Schnittvorgang lässt sich bei höheren Bahnlaufgeschwindigkeiten praktisch nur mit einem schlagartig, z.B. innerhalb von 0,1 - 0,5 Sekunden und gleichzeitig über die gesamte Bahnbreite wirkenden Messer erzielen, das bei Bahnwicklern für die Produktion oder Verarbeitung von typischen technischen Kunststoffolien meist ein gezacktes Messer ist, wie z.B. in CH-A-674 352 beschrieben. Nach der z.B. in der oben genannten Patentschrift DE-A-2 243 504 beschriebenen Querschneidemethode wird eine Schneide oder Klinge mit relativ hoher Geschwindigkeit quer über die Materialbahn geführt, was zu einem schrägen Schnitt führt.In particular, two problems have to be solved here, namely on the one hand a very quick, clean and precise separation or cutting process and on the other hand the front end of a new web section in winding contact with a fresh, i.e. bring empty winding tube. An approximation Right-angled cutting can be done at higher web speeds practically only with a sudden, e.g. within 0.1 - 0.5 seconds and simultaneously over the entire Achieve web width acting knife, that with web winders for the production or processing of typical technical Plastic sheeting is mostly a serrated knife, like e.g. in CH-A-674 352. After e.g. in the above mentioned cross-cutting method described DE-A-2 243 504 becomes a relatively high cutting edge or blade Speed led across the web, leading to leads to an oblique cut.

Zum Erzielen des Wickelkontaktes für das Anwickeln einer noch leeren Wickelhülse werden üblicherweise Klebstoffe oder Klebebänder verwendet. Dies hat in der Praxis verschiedene Nachteile, wie das Unwirksamwerden der Klebschichten durch Verstauben, das ungewollte Verschleppen von Klebstoff oder Klebband in die Wickel und die Verwendung organischer Lösungsmittel. Vorschläge zum Erzielen des Wickelkontaktes auf elektrostatischem Wege, wie z.B. in EP-A-0 270 498 und dem darin diskutierten Stand der Technik beschrieben, haben sich in der Praxis wegen der erforderlichen hohen Spannungen und den Folgen einer Veränderung der Luftfeuchtigkeit bisher nicht durchsetzen können.To achieve the winding contact for winding one Empty winding sleeves are usually used as adhesives or Adhesive tapes used. In practice, this has several Disadvantages such as the ineffectiveness of the adhesive layers Dusting, the unwanted carryover of glue or Adhesive tape in the wrap and the use of organic solvents. Suggestions for achieving winding contact on electrostatic Ways such as in EP-A-0 270 498 and the therein discussed state of the art have been described in the Practice because of the high tensions required and the consequences a change in humidity has not yet been implemented can.

Ein gemeinsamer Nachteil der bekannten Verfahren und Vorrichtungen ist ein mehr oder weniger starker Ruck beim Anwikkelvorgang, der zu nachteiligen Auswirkungen auf vorgelagerte, d.h. aufstromseitige Fabrikations-, Verabreitungs- oder Veredelungseinheiten führen kann.A common disadvantage of the known methods and devices is a more or less strong jerk during the wiggling process, the adverse effects on upstream, i.e. upstream manufacturing, processing or upgrading units can lead.

Aufgabe der Erfindung ist es, ein Anwickelverfahren zu bieten, das die oben genannten Nachteile nicht oder höchstens in vernachlässigbarem Umfang hat. Aufgabe der Erfindung ist auch eine verbesserte Trennvorrichtung und ein neuer Bahnwickler. The object of the invention is to provide a winding method offer that the above disadvantages not or at most to a negligible extent. The object of the invention is also an improved cutting device and a new web winder.

Diese Aufgaben werden erfindungsgemäss gelöst durch ein Verfahren mit den in Anspruch 1 angegebenen Merkmalen.According to the invention, these objects are achieved by a Method with the features specified in claim 1.

Bevorzugte Ausführungsformen des erfindungsgemässen Verfahrens haben die in den Ansprüchen 2 bis 8 definierten Merkmale.Preferred embodiments of the invention Process have those defined in claims 2 to 8 Characteristics.

Die Erfindung betrifft ferner eine neue Trennvorrichtung mit den Merkmalen von Anspruch 9, wobei bevorzugte Ausführungsformen dieser Vorrichtung die Merkmale der Ansprüche 10-11 haben.The invention further relates to a new separation device having the features of claim 9, preferred Embodiments of this device have the features of Have claims 10-11.

Die Erfindung betrifft auch eine Vorrichtung zur Durchführung des neuen Verfahrens mit den Merkmalen von Anspruch 12 und bei einer bevorzugten Ausführungsform mit den Merkmalen von Anspruch 13.The invention also relates to a device for Implementation of the new procedure with the characteristics of Claim 12 and in a preferred embodiment the features of claim 13.

DE-A-195 42 096 beschreibt eine Vorrichtung mit vergleichbarem Aufbau, wobei der für das Anwickeln dienende Luftstrom aber von einer Schlitzdüse als Injektstrom in der Nähe des Einströmbereichs, d.h. im Gegensatz zur vorliegenden Erfindung mit einem lokalen Überdruck, verursacht wird.DE-A-195 42 096 describes a device with comparable structure, the one used for winding Air flow but from a slot nozzle as an inject flow in the Proximity of the inflow area, i.e. in contrast to present invention with a local overpressure, is caused.

Schliesslich betrifft die Erfindung auch die Anwendung des neuen Verfahrens zum Anwickeln von praktisch endlosen Bahnen oder Streifen aus Kunststofffolie im Zuge der Herstellung oder Verarbeitung der Folie. Finally, the invention also relates to the application of the new method for winding practically endless Sheets or strips of plastic film in the course of the Production or processing of the film.

Die hier verwendete Bezeichnung "Wickelkontakt" bedeutet einen für das Anwickeln einer frischen Wickelhülse ausreichenden Kontakt zwischen der Hülse und dem durch das Trennen der bahn entstandenen neuen vorderen bahnende.The term "winding contact" used here means one sufficient for winding a fresh winding tube Contact between the sleeve and the by separating the new front end.

Die Geschwindigkeit des Luftstroms ist dabei vorzugsweise mindestens zweimal, insbesondere mindestens dreimal und z.B. sechsmal höher als die Geschwindigkeit der typisch mit Bahnlaufgeschwindigkeiten von 30 - 400 Meter/Minute oder mehr kontinuierlich laufenden Materialbahn.The speed of the air flow is preferred at least twice, especially at least three times and e.g. six times higher than the speed of typical web running speeds from 30 - 400 meters / minute or more continuously running material web.

Dabei ist jede Wickelwalze, also sowohl diejenige des vorangehenden fertigen Wickels als auch die des frischen nachfolgenden Wickels mit einem Zentralantrieb verbunden, der so gesteuert werden kann, dass die auf die Bahn einwirkende Zugspannung auf einem gewünschten Wert gehalten werden kann und nicht von der Dicke des jeweiligen Wickels abhängig ist. Zweckmässiger Weise wird hierzu ein von der linken und ein von der rechten Seite des Wicklers einwirkender Antrieb verwendet.Each winding roller is therefore both of the previous finished wrap as well as that of the fresh one subsequent winding connected to a central drive, the can be controlled so that the one acting on the web Tension can be kept at a desired value and is not dependent on the thickness of the respective roll. For this purpose one of the left and one of on the right side of the winder.

Vorzugsweise wird der bogenförmige Luftstrom durch einen in der Nähe der Kontaktlinie zwischen Wickelwalze und der an dieser anliegenden Wickelhülse wirkenden Unterdruck, z.B. von -450 bis -900 Millibar, erzeugt. Gemäss einer bevorzugten Ausführungsform des Verfahrens wird die Bildung des bogenförmigen Luftstroms durch seitliche Zuströme unterstützt, die durch die Druckdifferenz zwischen dem angelegten Unterdruck und dem Umgebungsdruck oder einem überatmosphärischen Druck aus einer Überdruckquelle erzeugt werden.Preferably, the arcuate air flow is through a near the contact line between the winding roller and the this adjacent winding tube acting negative pressure, e.g. of -450 to -900 millibars. According to a preferred embodiment the process is the formation of the arcuate Airflow supported by side inflows caused by the Pressure difference between the negative pressure applied and the ambient pressure or an atmospheric pressure from a Overpressure source are generated.

Allgemein wird bevorzugt, dass die Materialbahn bei Betätigung der Trenneinrichtung etwa die Hälfte des Umfangs der Wickelhülse an dieser anliegt.It is generally preferred that the material web be actuated the separator about half the circumference of the Winding sleeve bears against this.

Um den Trennvorgang praktisch ruckfrei zu machen, ist es zweckmässig, die Materialbahn mit Hilfe eines im Inneren der Wickelwalze anliegenden Unterdrucks auf der mit Durchbrechungen des Walzenmantels versehen Wickelwalze zu halten. Ferner kann zur Verstärkung des Kontaktes der Materialbahn mit der Wickelhülse im Inneren der mit Durchbrechungen versehenen Wikkelhülse ein Unterdruck angelegt werden.To make the separation process practically smooth, it is expedient, the material web with the help of an inside of Vacuum roll applied negative pressure on the with openings of the roll shell provided to hold the winding roll. Further can strengthen the contact of the material web with the Winding sleeve inside the winding sleeve provided with openings a negative pressure can be applied.

Die erfindungsgemässe Trennvorrichtung für eine Vorrichtung zum Aufwickeln einer kontinuierlich laufenden Materialbahn auf eine Folge von Wickelhülsen ist dadurch gekennzeichnet, dass die Trennvorrichtung einen praktisch über die Länge der Wickelhülsen sich erstreckenden Vakuumkanal besitzt, der mit einer die Wickelhülse um mindestens ein Viertel ihres Umfangs bogenförmig umfassenden Leitwand und einem Zackenmesser verbunden ist, um das bei Betätigung der Trennvorrichtung gebildete vordere Ende der laufenden Materialbahn unter der Einwirkung eines bogenförmigen Luftstroms, der sich um mindestens etwa ein Viertel des Hülsenumfangs mindestens annähernd über die Breite der Wickelhülse und bis nahe zur Kontaktlinie zwischen der Wickelwalze und der anliegenden Wickelhülse erstreckt, mit der wickelhülse in Wickelkontakt zu bringen. Vorzugsweise ist die Trennvorrichtung mit einer Einrichtung zum Einschwenken des Messers in den Weg der Materialbahn zwischen einer an der Wickelwalze anliegenden frischen Wickelhülse und einer beweglichen Umlenkwalze, die in eine Position nahe der Wickelhülse gebracht ist, verbunden.The separating device according to the invention for a device for winding a continuously running material web on a sequence of winding cores is characterized that the separator is practically the length the winding tube has an extending vacuum channel, the with a the winding tube by at least a quarter of its circumference arcuate guide wall and a serrated knife is connected to that formed when the separation device is actuated front end of the running material web under the action an arcuate airflow that is at least about a quarter of the sleeve circumference at least approximately the width of the winding tube and up to the contact line between the winding roller and the adjacent winding tube, to bring in winding contact with the winding tube. Preferably is the separation device with a device for Swinging the knife into the path of the material web between a fresh winding tube lying against the winding roller and a movable guide roller, which is in a position close to the Winding sleeve is brought connected.

Die erfindungsgemässe Vorrichtung zum Aufwickeln einer kontinuierlich laufenden Materialbahn auf eine Folge von Wikkelhülsen besitzt eine Wickelwalze, mindestens eine bewegliche Umlenkwalze und eine Einrichtung zum Durchtrennen der Materialbahn, um an dieser ein auf eine vorangehende volle Wikkelhülse auflaufendes Bahnende und ein zum Anwickeln der nachfolgenden leeren Wickelhülse bestimmtes Bahnende zu bilden, und ist dadurch gekennzeichnet, dass die Trenneinrichtung einen über die Länge der Wickelhülsen sich erstrekkenden Vakuumkanal besitzt, der mit einer die Wickelhülse um mindestens ein Viertel ihres Umfangs bogenförmig umfassenden Leitwand und einem Zackenmesser verbunden ist, um das bei Betätigung der Trennvorrichtung gebildete vordere Ende der laufenden Materialbahn unter der Einwirkung eines bogenförmigen Luftstroms, der sich um mindestens etwa ein Viertel des Hülsenumfangs mindestens annähernd über die Breite der Wickelhülse und bis nahe zur Kontaktlinie zwischen der Wickelwalze und der anliegenden Wickelhülse erstreckt, mit der Wickelhülse in Wickelkontakt zu bringen.The inventive device for winding a continuously running material web on a sequence of winding sleeves has a winding roller, at least one movable one Deflection roller and a device for severing the material web, around this one onto a preceding full winding sleeve ascending web end and one for winding the following to form an empty winding tube specific end of web, and is characterized in that the separating device has a extending over the length of the winding tubes Has a vacuum channel with one around the winding tube encompassing at least a quarter of its circumference in an arc shape Guide wall and a serrated knife is connected to this when actuated the separator formed front end of the current Material web under the action of an arcuate Airflow that is at least about a quarter of the sleeve circumference at least approximately over the width of the winding tube and close to the line of contact between the winding roller and the adjacent winding tube extends with the winding tube bring in winding contact.

Vorzugsweise hat die Wickelwalze (21) einen mit einer Gummiauflage versehenen Mantel, z.B. aus Stahl, und Durchbrechungen, um mittels eines im Inneren der Wickelwalze herrschenden Unterdrucks eine anliegende Materialbahn in verstärktem Kontakt zu halten und einen praktisch ruckfreien Anwickelbetrieb zu ermöglichen.The winding roller (21) preferably has one with a Coat provided with a rubber pad, e.g. made of steel, and perforations, to by means of one prevailing inside the winding roller Vacuum an adjacent material web in reinforced To keep in touch and a practically smooth start-up operation to enable.

Schliesslich betrifft die Erfindung auch die Anwendung des neuen Trennverfahrens zum Anwickeln von praktisch endlosen Bahnen oder Bändern aus Kunststoffolie im Zuge der Herstellung der Folie, z.B. durch Extrusion, oder der Verarbeitung, z.B. durch Zertrennen, Bedrucken oder andere Bearbeitungen der Bahnen. Die hier verwendete Bezeichnung "praktisch endlos" bezieht sich auf Bahn- oder Bandlängen, die im Verhältnis zur Bahn- oder Bandbreite sehr gross sind, z.B. mindestens um den Faktor 1000 grösser. Geeignete Kunststoffolien sind solche mit Dicken im Bereich von typisch zwischen 5 und 1000 µm aus den bekannten Polymeren, Copolymeren, Propfpolymeren, Polymermischungen mit filmbildenden Molekulargewichten einschliesslich der für die Folienherstellung und -verarbeitung üblichen Zusatzstoffe.Finally, the invention also relates to the application the new separation process for winding practically endless Sheets or strips of plastic film in the course of manufacture the film, e.g. by extrusion, or processing, e.g. by cutting, printing or other processing of the webs. The term "practically endless" used here refers on web or tape lengths that are in relation to the Path or bandwidth are very large, e.g. at least around that Factor 1000 greater. Suitable plastic films are those with Thicknesses in the range of typically between 5 and 1000 µm from the known polymers, copolymers, graft polymers, polymer mixtures with film-forming molecular weights included the additives common for film production and processing.

Die Erfindung wird anhand der beiliegenden Zeichnungen näher erläutert. Es zeigen:

  • Figur 1 eine schematische Darstellung des Ablaufs eines erfindungsgemässen Trennverfahrens;
  • Figur 2 eine schematische Teilansicht einer erfindungsgemässen Trenneinrichtung im Zusammenhang mit einer erfindungsgemässen Wickelvorrichtung und
  • Figur 3 eine Modifikation der Trenneinrichtung gemäss Darstellung in Figur 2.
    • The invention is explained in more detail with reference to the accompanying drawings. Show it:
  • Figure 1 is a schematic representation of the sequence of a separation method according to the invention;
  • FIG. 2 shows a schematic partial view of a separating device according to the invention in connection with a winding device according to the invention and
  • 3 shows a modification of the separating device as shown in FIG. 2.

    • Das Schema von Fig. 1 zeigt den Trenn- und Anwickelvorgang einer Vorrichtung 15 in fünf Stufen (I - V). Es muss betont werden, dass diese Unterteilung nur der Erläuterung dient und der Vorgang in Wirklichkeit kontinuierlich abläuft. In der ersten Stufe I ist die über eine Wickelwalze 11 laufende Materialbahn B, z.B. eine von einem Extruder kommende Folienbahn aus Kunststoff, eine Papier- oder Textilmaterialbahn, dargestellt, die auf dem anliegenden, nahezu vollen Materialbahnwickel 12 um die vorangehende Wickelhülse 14 aufgewickelt wird. Der nahezu volle Wickel 12 wird seitlich von einem üblicherweise als "Wickelstation" bezeichneten schwenkbaren Paar Arme 120 (nur der vordere ist in Fig. 1 dargestellt) in einer gewünschten Position und mit gewünschtem bzw. in bekannter Weise (siehe z.B. die beiden oben genannten Europäischen Pantentschriften) gesteuertem Anpressdruck an der Wickelwalze 11 gehalten. Eine schwenkbare Ausführungsform der Wickelstation 120 ist aber für die vorliegende Erfindung nicht kritisch und kann anders, z.B. als gesteuert verfahrbarer Schlitten mit vertikaler Abstützung ausgebildet sein.The diagram of Fig. 1 shows the separation and winding process a device 15 in five stages (I - V). It has to be stressed that this subdivision is only for explanation and the process is actually ongoing. In the first stage I is the material web running over a winding roller 11 B, e.g. a film web coming from an extruder made of plastic, a paper or textile material web, shown, on the adjacent, almost full web of material 12 wound around the preceding winding tube 14 becomes. The almost full wrap 12 is usually on the side of one referred to as a "winding station" pivotable pair Arms 120 (only the front one is shown in Fig. 1) in one desired position and with desired or in known Wise (see e.g. the two European pantomexts mentioned above) controlled contact pressure on the winding roller 11 held. A pivotable embodiment of the winding station However, 120 is not critical to the present invention can be different, e.g. as a controlled movable carriage with vertical support.

    Eine leere frische Wickelhülse 16 mit (nicht dargestelltem) Führungsdorn wird aus einem (nicht dargestellten) Magazin üblicher Bauart zugeführt und eine Umlenkwalze 18 wird aus ihrer Ruhestellung in Richtung auf die Folienbahn B auf dem Wickel 12 geführt.An empty fresh winding tube 16 with (not shown) Guide mandrel is made from a (not shown) Magazine of conventional design supplied and a guide roller 18 is from their rest position towards the film web B. the winding 12 out.

    In der folgenden Stufe II gelangt die Umlenkrolle 18 in Kontakt mit der Folienbahn B auf dem Folienwickel 12 während gleichzeitig eine leere Wickelhülse 16 mit Hilfe eines (zur besseren Uebersicht nicht dargestellten) üblichen Schwenkarmpaares (als "Anwickelstation" bezeichnet) in Richtung zum Spalt zwischen der Wickelwalze 11 und dem Folienwickel 12 geführt wird, bis die Umlenkrolle 18 am Folienwickel 12 anliegt. In the following stage II, the deflection roller 18 comes in Contact with the film web B on the film wrap 12 during at the same time an empty winding tube 16 using a (for better overview, not shown) usual pair of swivel arms (referred to as the "winding station") towards Gap between the winding roller 11 and the film roll 12 out until the deflection roller 18 abuts the film roll 12.

    In Stufe III wird der Foleinwickel 12 durch Verschwenken (bzw. Verfahren) der Wickelstation 120 von der Wickelwalze 11 entfernt, während die leere Wickelhülse 16 und die Umlenkrolle 18 in die Position bewegt werden, die in Stufe IV des Schemas von Fig. 1 dargestellt ist, d.h. die Umlenkrolle 18 am Folienwickel 12 anliegt und für diesen nach Beendigung des Kontaktes mit der Wickelwalze 11 als Anlegewalze dient, und zwar vorzugsweise in einer Position oberhalb der vor der Beendigung des Kontakts bestehenden Kontaktlinie zwischen der Wickelwalze 11 und dem Folienwickel 12. Die Bahn B läuft in Stufe IV weiter auf den Folienwickel 12, allerdings mit dem Umweg um die noch leere Wickelhülse 16 und die Umlenkrolle 18.In stage III, the foil wrapper 12 is pivoted (or method) of the winding station 120 from the winding roller 11 removed while the empty winding tube 16 and the guide roller 18 to be moved to the position in stage IV of the scheme of Figure 1, i.e. the deflection roller 18 on the film roll 12 is present and for this after termination of the contact serves with the winding roller 11 as a contact roller, and preferably in a position above that before termination the contact existing contact line between the winding roller 11 and the film wrap 12. The web B continues in stage IV on the film wrap 12, but with the detour around empty winding tube 16 and the deflection roller 18th

    Nun wird die Trenneinrichtung 10 in Richtung auf die Materialbahn B im Bereich zwischen der leeren Wickelhülse 16 und der Umlenkrolle 18 geführt, wo die Materialbahn frei läuft, d.h. weder an der Umlenkrolle 18 noch an der leeren Wickelhülse 16 anliegt. Zwischen der Umlenkrolle 18 und der leeren Wikkelhülse 16 muss somit ein ausreichender Abstand bestehen, damit die nunmehr zur Bahn B geführte Schneidvorrichtung 10 die Materialbahn B im Bereich ihres freien Laufs zwischen Umlenkrolle 18 und der immer noch leeren Wickelhülse beaufschlagen und schliesslich (Schritt V) durchtrennen kann, sodass ein auf den Folienwickle 12 auflaufendes "hinteres" Ende der Folienbahn B und ein zum Anwickeln auf der noch leeren Wickelhülse 16 bestimmtes "vorderes" Ende der kontinuierlich weiter laufenden Folienbahn B gebildet wird.Now the separating device 10 in the direction of the material web B in the area between the empty winding tube 16 and the deflection roller 18, where the material web runs freely, i.e. neither on the deflection roller 18 nor on the empty winding tube 16 is present. Between the guide roller 18 and the empty winding sleeve 16 must therefore be a sufficient distance so that the cutting device 10 now led to the web B. Material web B in the area of its free run between the deflection roller 18 and the still empty winding tube and finally (step V) can cut through so that a "rear" end running onto the film roll 12 the film web B and one for winding on the still empty Winding sleeve 16 certain "front" end of the continuous continued running film web B is formed.

    Die Einzelheiten des nunmehr folgenden Anwickelvorgangs gemäss der vorliegenden Erfindung durch einen Lufstrom sind eingehender im Zusammenhang mit den folgenden Fig. 2 und 3 beschrieben. In der dem Anwickelvorgang folgenden Stufe VI des Schemas von Fig.1 ist noch angedeutet, wie die Wickelstation 120 nach Entnahme des fertigen Folienwickels 12 die Wickelhülse 16 mit der darauf inzwischen angewickelten Folienbahn B aus der (nicht dargestellten) Anwickelstation übernimmt und bis zum nachfolgenden Bahntrennungs- und Anwickelvorgang in Kontakt mit der Wickelwalze 11 hält. Für das Verständnis der Erfindung ist noch zu ergänzen, dass sowohl die Wickelstation als auch vorzugsweise die Anwickelstation zum Betrieb als Zentralwickler mit einem (nicht dargestellten) regelbaren Drehbewegungsantrieb verbunden ist, um die auf die Bahn einwirkende Zugspannung in an sich bekannter Weise in Abhängigkeit von den Materialparametern, wie Art, Eigenschaft und Dicke des Bahnmaterials und dem gewünschten Lineardruckes am Spalt zwischen der Wickelwalze 11 und dem anliegenden Folienwickel 12 zu kontrollieren.The details of the following starting process according to the present invention by an air flow Described in more detail in connection with the following FIGS. 2 and 3. In the stage VI following the starting process Scheme of Fig.1 is still indicated, like the winding station 120 after removal of the finished film roll 12 the winding tube 16 with the film web B wound on it in the meantime the (not shown) winding station takes over and up for the subsequent web cutting and winding process holds with the winding roller 11. For understanding the invention is to add that both the winding station and also preferably the winding station for operation as a central winder with an adjustable rotary drive (not shown) connected to the one acting on the web Tension in a manner known per se depending on the Material parameters such as type, property and thickness of the web material and the desired linear pressure at the gap between check the winding roller 11 and the adjacent film winding 12.

    In jedem Fall wird das vordere Ende des nachfolgenden Materialbahnabschnitts auf der leeren Wickelhülse 16 angewikkelt, damit der (nicht dargestellte) Zentralantrieb, der mit der Wickelhülse 16 in Eingriff gebracht wird, den dem Wickelvorgang angepassten Wickelzug ausüben kann. Die genauen Betriebsparameter (Kontaktdruck am Spalt zwischen Bahnwickel und Wickelwalze; Zugspannung und Laufgeschwindigkeit) hängen in an sich bekannter Weise von der Art der Wickelvorrichtung 15 und dem Bahnmaterial ab und können von Fachleuten anhand einiger weniger einfacher Versuche optimiert werden.In any case, the front end of the subsequent material web section embossed on the empty winding tube 16, thus the (not shown) central drive with the winding tube 16 is engaged, the winding process adjusted wrap can exercise. The exact operating parameters (Contact pressure at the gap between web winding and Winding roller; Tension and running speed) hang in known manner from the type of winding device 15 and the web material and can be used by experts using some less simple experiments can be optimized.

    Der wesentlich Unterschied zwischen dem erfindungsgemässen Verfahren und dem Stand der Technik liegt nun in der Art, in welcher der zum Anwickeln erforderliche Wickelkontakt erzielt wird. Gemäss Stand der Technik wird dieser Kontakt entweder mit Hilfe von Klebstoff (z.B. in Form von Klebband auf der Oberfläche der Wickelhülse) oder mittels elektrostatischer Aufladung der Folie gegenüber der Wickelhülse erzielt. Beim erfindungsgemässen Verfahren wird auf diese Art der Bildung des Wickelkontkates verzichtet, d.h. weder Klebstoff in irgend einer Form noch eine elektrostatische Aufladung verwendet, und das neue "vordere" Ende der Materialbahn mit Hilfe eines Luftstroms auf die Wickelhülse geführt und auf dieser solange gehalten, bis die fortgesetzte Drehung der Wickelhülse eine Festklemmung des Bahnendes zwischen der Oberfläche der Wickelhüise und der darüber gewickelten folgenden Schicht der Materialbahn bewirkt. Diese neue Anwickelmethode wird hier auch kurz als "pneumatisches Anwickeln" bezeichnet und nachfolgend eingehender erläutert.The main difference between the inventive The method and the state of the art now lies in the way in which the winding contact required for winding is achieved becomes. According to the state of the art, this contact is either with the help of glue (e.g. in the form of adhesive tape the surface of the winding tube) or by means of electrostatic The film is charged against the winding tube. At the The method according to the invention is based on this type of formation of the winding contact, i.e. neither glue in any a form still uses an electrostatic charge, and the new "front" end of the material web with the help of an air stream guided on the winding tube and held on it as long as until the winding sleeve continues to rotate Clamping the end of the web between the surface of the wrap and the following layer of the material web wound over it causes. This new winding method is also here briefly referred to as "pneumatic winding" and below explained in more detail.

    In Fig. 2 ist schematisch und ausschnittsweise eine Wikkelvorrichtung 25 mit einer erfindungsgemässen Trenneinrichtung 20 dargestellt, die in der in Fig. 1 beschriebenen Weise in den Weg der Materialbahn B zwischen der Wickelwalze 21 und der beweglichen Umlenkrolle 28 geführt worden ist. Die Trenneinrichtung 20 ist mit einem Messer 201 versehen, das in nicht dargestellter, aber an sich bekannter Art als Zackenmesser ausgebildet ist und sich mindestens über die gesamte Breite der Materialbahn B erstreckt. Beim Kontakt des Messers 201 mit der Bahn B wird diese innerhalb eines sehr kurzen Zeitraums von z.B. 0,1 - 0,5 Sekunden schlagartig durchtrennt und dadurch das um die Umlenkrolle 28 auf den (nicht dargestellten) fertigen Bahnwickel auflaufende "hintere" Bahn-Ende E0 sowie das "neue" bzw. "vordere" Bahnende E1 gebildet. Letzteres wird von einem bogenförmigen Luftstrom L auf die Oberfläche der Wickelhülse 26 geblasen und auf dieser in Wickelkontakt gehalten.FIG. 2 schematically and in detail shows a winding device 25 with a separating device 20 according to the invention, which has been guided in the manner described in FIG. 1 into the path of the material web B between the winding roller 21 and the movable deflection roller 28. The separating device 20 is provided with a knife 201 which is designed as a serrated knife in a manner which is not shown but is known per se and which extends at least over the entire width of the material web B. When the knife 201 comes into contact with the web B, it is cut suddenly within a very short period of time, for example 0.1-0.5 seconds, and thereby the “rear” web end running around the deflection roller 28 onto the finished web reel (not shown) E 0 and the "new" or "front" web end E 1 are formed. The latter is blown onto the surface of the winding tube 26 by an arc-shaped air flow L and held in winding contact thereon.

    Der bogenförmige Luftstrom L entsteht dadurch, dass mittels einer gebogenen und sich mindestens über die gesamte Breite der Materialbahn B erstreckenden Leit- oder Führungswand 203 und der benachbarten Oberfläche-der Wickelhülse 26 ein bogenförmiger Raum gebildet wird, dessen der Wickelwalze 21 benachbartes Ende mit einem Vakuumkanal 200 verbunden ist. Der Kanal 200 kann ein mit dem Messer 201 verbundenes Gehäuse sein, das von der Leitwand 203, der nahe der Wickelwalze 21 verlaufenden Wand 204, der Rückwand 205 und der Oberwand 206 gebildet wird. Der Kanal 200 hat eine schlitzförmig über die Kanalbreite sich erstreckende Öffnung 209, die den Luftstrom L erzeugt. Ein Leitblech 27 kann dazu dienen, den Weg des Luftstromes L bis nahe an die Wickelwalze 21 zu führen.The arcuate air flow L arises from the fact that by means of one curved and at least over the whole Width of the material web B extending guide or guide wall 203 and the adjacent surface of the winding tube 26 an arcuate space is formed, of which the winding roller 21 adjacent end is connected to a vacuum channel 200. The channel 200 can be a housing connected to the knife 201 be that of the guide wall 203, the near the winding roller 21st extending wall 204, rear wall 205 and top wall 206 is formed. The channel 200 has a slot shape over the Channel width extending opening 209 that the air flow L generated. A baffle 27 can serve the path of the air flow L to lead close to the winding roller 21.

    Die (nicht dargestellten) seitlichen Enden des Vakuumkanais sind verschlossen bzw. mit einer Vakuumquelle, z.B. einem unter Unterdruck stehenden (nicht dargestellten) Kessel verbunden, der laufend mit entsprechend leistungsfähigen Pumpen evakuiert wird.The side ends (not shown) of the vacuum channel are closed or with a vacuum source, e.g. one pressurized boiler (not shown) connected, which runs continuously with correspondingly powerful pumps is evacuated.

    Die Wickelwalze 21 hat gemäss einer bevorzugten Ausführungsform der Erfindung bei Anwendung auf luftundurchlässige Bahnmaterialien, wie insbesondere Kunststoffolien oder relativ dichte Papiere, einen hohlen Innenraum 210, der ebenfalls mit einer (nicht dargestellten) Vakuumquelle verbunden ist und die meist um etwa 180° des Umfangs der Wickelwalze 21 an dieser anliegende Materialbahn B auf der z.B. aus einer Gummischicht 212 auf der Mantelwand 211 bestehenden Oberfläche der Wickelwalze 21 hält. Diese Massnahme hat den besonderen Vorteil der Vermeidung von ruckartigen Einwirkungen auf die Materialbahn im Bereich zwischen der Wickelwalze 21 und einem aufstromseitigen Bereich der Materialbahn, der z.B. im Zusammenhang mit der Herstellung von Kunststoffolien durch Extrusion oder ähnliche Verfahren für ruckartige Belastungen empfindlich ist, etwa durch ein unkontrolliertes Verstrecken oder Durchhängenund dadurch bedingte Bahnverspannungen bzw. durch Verstrekken verursachte Orientierungs- bzw. Festigkeitsunterschiede.The winding roller 21 has, according to a preferred embodiment of the invention when applied to airtight Web materials, such as plastic films in particular or relatively dense papers, a hollow interior 210, also with a vacuum source (not shown) is connected and the usually around 180 ° of the circumference of the winding roller 21 on this adjacent material web B on e.g. from a rubber layer 212 existing surface of the winding roller on the jacket wall 211 21 holds. This measure has the particular advantage of Avoidance of jerky effects on the material web in the area between the winding roller 21 and an upstream side Area of the material web, e.g. in connection with the production of plastic films by extrusion or the like Procedure is sensitive to jerky loads, such as uncontrolled stretching or sagging resulting tension in the web or by stretching caused differences in orientation or strength.

    In Fig. 2 ist die Wickelhülse 26 als auf einem massiven Kerndorn 261 geführt dargestellt. Es liegt aber im Rahmen der Erfindung, auch im Inneren der Wickelhülse 26 einen Unterdruck zu erzeugen, der-über die durchbrochen eingezeichneten Kanäle 263 auf die anliegende Materialbahn einwirkt und diese ansaugt.In Fig. 2 the winding tube 26 is as on a solid Core mandrel 261 shown guided. But it is within the Invention, also inside the winding tube 26, a negative pressure to generate the over-the-dashed channels 263 acts on the adjacent material web and sucks it up.

    Fig. 3 zeigt eine Modifikation der in Fig. 2 schematisch dargestellten Trenneinrichtung: hierbei wird der Vakuumkanal 300 von einem Hohlkörper, z.B. einem Rohr 39, gebildet, das eine schlitzförmige Öffnung 309 zum Ansaugen des Luftstromes L besitzt. Die Verbindung mit dem Messer 301 kann dabei beliebig, z.B. in Form eines einfachen Verbindungsbleches oder -bügels ausgebildet sein, sofern nur die bogenförmige Leitwand 303 erhalten bleibt. Gewünschtenfalls können die drei erfindungswesentlichen Merkmale der Trenneinrichtung 30 - nämlich der Vakuumkanal 300, die bogenförmige Leitwand 303 und das damit verbundene Messer 301 - mit den Wänden 304, 305 und 306 zu einem Hohlkörper vereinigt sein, der wahlweise mit der Atmosphäre verbunden ist oder unter erhöhtem Druck steht. In beiden Fällen wird dabei der Luftstrom L über die Verbindungskanäle 322 mit zusätzlicher Luft versorgt, welche die Materialbahn B gegen die Wickelhülse 36 drückt. Auch im Bereich des Übergangs vom Messer 301 zur Leitwand 303 können eine oder mehrere Öffnungen 321 vorgesehen werden, um eine zusätzlich seitlich wirkende Komponente des Luftstroms L zu erzeugen.Fig. 3 shows a modification of the in Fig. 2 schematically shown separator: this is the vacuum channel 300 from a hollow body, e.g. a tube 39, formed the a slot-shaped opening 309 for sucking in the air flow L. has. The connection with the knife 301 can be arbitrary, e.g. in the form of a simple connecting plate or bracket be formed, provided only the arcuate guide wall 303 remains. If desired, the three essential to the invention Features of the separator 30 - namely the vacuum channel 300, the arcuate guide wall 303 and so on connected knife 301 - with walls 304, 305 and 306 be a hollow body, optionally with the atmosphere connected or under increased pressure. In both Cases of airflow L via the connecting channels 322 supplied with additional air, which the material web B presses against the winding tube 36. Also in the area of Transition from knife 301 to baffle 303 can be one or Multiple openings 321 are provided to add one to produce a laterally acting component of the air flow L.

    Vorzugsweise ist die Geometrie aller erfindungswesentlichen Teile einer erfindungsgemässen Trenneinrichtung - d.h. bei der in den Figuren 2 und 3 dargestellten Ausführung der Leitwand 203,303, des Messers 201, 301 und des Vakuumkanals 200,300 - so gestaltet, dass der bogenförmige Luftstrom L mindestens 90°, vorzugsweise mindestens 120° und insbesondere mindestens 140° des Umfangs der Wickelhülse umfasst und die bis zum Augenblick der Bahntrennung an der Wickelhülse anliegende Materialbahn die Wickelhülse mindestens zu etwa 180° ihres Umfangs umfasst.The geometry is preferably all essential to the invention Parts of a separation device according to the invention - i.e. in the embodiment of the shown in Figures 2 and 3 Baffle 203,303, the knife 201, 301 and the vacuum channel 200,300 - designed so that the arcuate airflow L at least 90 °, preferably at least 120 ° and in particular comprises at least 140 ° of the circumference of the winding tube and the until the moment the web is separated from the winding tube Material web the winding tube at least to about 180 ° of yours Scope includes.

    Gemäss einer (nicht dargestellten) modifizierten Ausführungsform der in den Fig. 2 und 3 beschriebenen Ausführungsformen einer erfindungsgemässen Vorrichtung wird anstelle eines Zackenmessers 201,301 eine bekannte Quertrennvorrichtung, z.B. gemäss DE-A-2 243 504, verwendet, die mit dem Gehäuse 20,30 verbunden ist und zu einem Schrägschnitt führt. Gemäss der Erfindung kann somit auch ein schräg verlaufender Schnitt am Anfang eines Folienabschnitts auf eine frische Hülse angewickelt werden, ohne dass die bekannten Hilfsmittel zum Anwikkeln (Kleben oder/und elektrostatisches Anhaften) verwendet werden müssen.According to a modified embodiment (not shown) of the embodiments described in FIGS. 2 and 3 a device according to the invention is instead of a Serrated knife 201,301 a known cross cutting device, e.g. according to DE-A-2 243 504, used with the housing 20.30 is connected and leads to an oblique cut. According to the invention can thus also be an oblique cut wrapped on a fresh tube at the beginning of a film section without using the familiar tools to tackle (Gluing or / and electrostatic adhesion) are used Need to become.

    Die erfindungsgemässe Trenneinrichtung ermöglicht eine im Vergleich zum Stand der Technik einfache Konstruktion sowie einen einfachen aber dennoch sicheren Betrieb und bietet damit eine Reihe weiterer Vorteile: so kann die Trenneinrichtung-abgesehen von dem meist aus Stahl, Hartstoff oder Keramik gefertigten Messer - aus Leichtmetall hergestellt werden, sodass die bewegte Masse vergleichsweise gering ist. Dabei kann das Ein- und Ausschwenken in üblicher Weise mit pneumatischen oder hydraulischen Betätigungselementen bewirkt werden. Die erfindungsgemässe Trenneinrichtung kann nicht nur in neue Anlagen sondern auch bestehende Anlagen zum Ersatz der bekannten Trenneinrichtungen eingebaut werden.The separating device according to the invention enables a Comparison to the prior art simple construction as well offers simple yet safe operation and thus offers a number of other advantages: so the separating device-apart mostly made of steel, hard material or ceramic Knives - made of light metal, so the moving mass is comparatively small. It can Swinging in and out in the usual way with pneumatic or hydraulic actuators are effected. The inventive Separating device can not only in new plants but also existing systems to replace the known ones Separators are installed.

    Claims (14)

    1. A method of winding a continuously moving web (B) of material onto a sequence of winding mandrels (16;26;36) on a winder (15;25;35) comprising a winding roller (11;21;31), at least one movable deflection roller (18;28;38), and a web-cutting device (10;20;30), wherein the leading end (E1) of the moving web (B) is brought into winding contact with said winding mandrel by the effect of an arc-shaped stream of air (L) that extends around at least about one quarter of the circumference of the mandrel at least approximately over the width of the winding mandrel and up to near contact line (K) between the winding roller and the adjacent winding mandrel; characterized in that the arc-shaped stream of air (L) is caused by a slit-shaped opening (209;309) extending across the entire channel width and generating a reduced pressure near the contact line (K) between the winding roller and the winding mandrel in contact therewith.
    2. The method of claim 1, characterized in that the velocity of the stream of air is at least two times and preferably at least three times greater than the velocity of the continuously moving web, wherein the velocity of movement of web (B) preferably is in the range of 30 - 400 meters per minute.
    3. The method of any of claims 1 - 3, characterized in that each winding mandrel (16:26:36) is connected with a central drive.
    4. The method of any of claims 1 - 3, characterized in that the reduced pressure is in the region of - 450 to - 900 mBar.
    5. The method of any of claims 1 - 4, characterized in that formation of the arc-shaped stream of air L is supported by lateral afflux streams (321;322).
    6. The method of any of claims 1 - 5, characterized in that web (B) contacts approximately half the circumference of the winding mandrel (16;26;36) when the web-cutting device is actuated.
    7. The method of any of claims 1 - 6, characterized in that web (B) is held on the winding roller (11;21;31) provided with openings (213;313) of the roller jacket (211;311) by means of a reduced pressure applied within the interior of the winding roller in order to render the web-cutting action substantially free of jolting.
    8. The method of any of claims 1 - 7, characterized in that for improving contact of web (B) with the winding mandrel (26) a reduced pressure is applied at the interior of the winding mandrel provided with perforations (263).
    9. A web-cutting device (10;20;30) of an apparatus (15;25;35) for winding a continuous web (B) of material onto a sequence of winding mandrels (16;26;36), characterized in that the web-cutting device comprises a vacuum channel (200;300) extending over the length of the winding mandrels and being connected with a guide wall (203;303) encompassing, in the shape of an arc, at least one quarter of the circumference of the winding mandrel (16;26;36), and being connected with a serrated knife (201;301) so as to bring the leading end (E1) of the moving web (B), formed upon actuation of the web-cutting device under the effect of an arc-shaped stream of air (L) extending for at least about one quarter of the circumference of the mandrel over at least approximately the length of the winding mandrel and up to near contact line (K) between the winding roller and the adjacent winding mandrel, into winding contact with the winding mandrel.
    10. The web-cutting device of claim 9, characterized in that it is connected with a device for pivoting into the path of web (B) between a fresh winding mandrel (16;26;36) contacting the winding roller (11;21;31) and a movable deflecting roller (18;28;38) moved into a position near the winding mandrel.
    11. The web-cutting device of any of claims 9 or 10, characterized in that the guiding wall (303) directing the arc-shaped air stream L is provided with openings (321;322) connected with the ambient atmosphere our with a source of air under elevated pressure.
    12. An apparatus for winding a continuously moving web (B) onto a sequence of winding mandrels (16;26;36), wherein said apparatus comprises a winding roller (11;21;31), at least one movable deflection roller (18;28;38), and a device (10;20;30) for cutting the web, for producing thereon a web end (E0) moving onto a preceding full winding mandrel, as well as a web end (E1) for commencing winding of a following empty winding mandrel, characterized in that the device for cutting comprises a vacuum channel (200;300) extending over the length of the winding mandrels, and being connected with a guide wall (203;303) encompassing, in the shape of an arc, at least one quarter of the circumference of the winding mandrel (16;26;36), as well as with a serrated knife (201;301) so as to bring the web's leading end (E1), formed upon actuation of the web-cutting device under the effect of an arc-shaped stream of air extending for at least about one quarter of the circumference of the mandrel over at least approximately the width of the winding mandrel (16;26;36) near contact line (K) between the winding roller and the adjacent winding mandrel, into winding contact with the winding mandrel.
    13. The apparatus of claim 12, characterized in that the winding roller (21) comprises a jacket (211) provided with a rubber coat (212) and having openings (213) in order to hold in firm contact a web (B) of material by means of a reduced pressure at the interior (210) of the winding roller (21) and to provide for a substantially jolt-free operation when commencing winding.
    14. Application of the method of any of claims 1 - 8 for commencing winding of substantially endless webs or bands of a film of plastics in the course of producing or processing of the film.
    EP98929372A 1997-07-30 1998-05-25 Winding method, device for separating a web and web winder Expired - Lifetime EP0999991B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    CH182497 1997-07-30
    CH182497 1997-07-30
    PCT/EP1998/003067 WO1999006313A1 (en) 1997-07-30 1998-05-25 Winding method, device for separating a tape from the tape winder

    Publications (2)

    Publication Number Publication Date
    EP0999991A1 EP0999991A1 (en) 2000-05-17
    EP0999991B1 true EP0999991B1 (en) 2002-09-04

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98929372A Expired - Lifetime EP0999991B1 (en) 1997-07-30 1998-05-25 Winding method, device for separating a web and web winder

    Country Status (6)

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    US (1) US6305635B1 (en)
    EP (1) EP0999991B1 (en)
    JP (1) JP2002509510A (en)
    AT (1) ATE223347T1 (en)
    DE (1) DE59805441D1 (en)
    WO (1) WO1999006313A1 (en)

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    DE50109308D1 (en) 2000-08-07 2006-05-11 Windmoeller & Hoelscher METHOD AND DEVICE FOR DISCONNECTING A RUNNING MATERIAL RAILWAY AND FOR DETERMINING THE NEXT TRAINING TRAVEL ON A WRAPPING SLEEVE
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    DE10321642B4 (en) * 2003-05-13 2006-01-05 Windmöller & Hölscher Kg Winding device with straight mounting rail
    DE10321599A1 (en) * 2003-05-13 2004-12-30 Windmöller & Hölscher Kg Winding device with electrostatic charging means and method for setting multilayer film
    DE10321600B4 (en) * 2003-05-13 2005-05-04 Windmöller & Hölscher Kg Winding device with a radiation source for positioning the cores
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    Also Published As

    Publication number Publication date
    WO1999006313A1 (en) 1999-02-11
    DE59805441D1 (en) 2002-10-10
    US6305635B1 (en) 2001-10-23
    EP0999991A1 (en) 2000-05-17
    JP2002509510A (en) 2002-03-26
    ATE223347T1 (en) 2002-09-15

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