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EP1332997B1 - Method and apparatus for the disposal of web material - Google Patents

Method and apparatus for the disposal of web material Download PDF

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Publication number
EP1332997B1
EP1332997B1 EP03008792A EP03008792A EP1332997B1 EP 1332997 B1 EP1332997 B1 EP 1332997B1 EP 03008792 A EP03008792 A EP 03008792A EP 03008792 A EP03008792 A EP 03008792A EP 1332997 B1 EP1332997 B1 EP 1332997B1
Authority
EP
European Patent Office
Prior art keywords
web
embossing
web material
separating
feed direction
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
EP03008792A
Other languages
German (de)
French (fr)
Other versions
EP1332997A1 (en
Inventor
Armin Steuer
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.)
STEUER GMBH PRINTING TECHNOLOGY
Original Assignee
Steuer Printing Technology GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Steuer Printing Technology GmbH filed Critical Steuer Printing Technology GmbH
Publication of EP1332997A1 publication Critical patent/EP1332997A1/en
Application granted granted Critical
Publication of EP1332997B1 publication Critical patent/EP1332997B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/02Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with longitudinal slitters or perforators
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00Advancing webs
    • B65H20/12Advancing webs by suction roller
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/04Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators
    • B65H35/08Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators from or with revolving, e.g. cylinder, cutters or perforators
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00Means using fluid
    • B65H2406/30Suction means
    • B65H2406/33Rotary suction means, e.g. roller, cylinder or drum
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00Handled material; Storage means
    • B65H2701/10Handled articles or webs
    • B65H2701/17Nature of material
    • B65H2701/175Plastic
    • B65H2701/1752Polymer film

Definitions

  • the invention relates to a method for disposing of flexible material which is in the form of at least one moving material web which is fed in a feed direction with a feed path speed of a disposal device, in particular for disposal of spent embossing film web during the operation of a hot stamping device.
  • a material layer to be embossed is guided in a hot embossing device at constant speed through an embossing gap which is formed between an embossing cylinder having an embossing tool and a counterpressure element, in particular an impression cylinder.
  • An embossing foil web is moved over the material layer in such a way that it moves at the same speed as the material layer during a stamping interval.
  • embossing material located on the embossing foil web for example discrete embossing units lying one behind the other, such as images or texts, or a Lucaslessness part of a color layer, transferred under the action of pressure and temperature on the material layer.
  • the embossing foil web is drawn off by a suitably formed transport device of a preferably roll-shaped film supply and moved through the embossing gap, and the spent embossing foil is carried away and must be disposed of.
  • An embossing device known from GB 2 254 586 has on the waste side a disposal device operating in the manner of a shredder or documentary printer, to which the used web material is fed by means of an upstream conveying station. This has two counter-rotating transport rollers, between which the web material is clamped and conveyed through. The discharge end of the conveyor emerging free end of the web material enters the insertion slot of the shredder, which ruptures the web material into small pieces of web material and promotes a collection container, which is emptied from time to time.
  • shredders can cause malfunctions in the cutting unit, for example due to incomplete tearing of the material or due to clogging of the cutting unit.
  • German patent DE 648 075 shows a cross cutter for paper webs with two rotating drums, one of which is partially wrapped by the web material and having a recess which is spanned by the web material, while the other has a synchronized with this drum rotating knife, which the Cutout spanning spanning web material severed.
  • a similar cross cutter, which is intended for dicing cigarette paper, is known from DE 37 30 810.
  • DE 40 21 573 A1 shows a device for removing and crushing cut strips calendered film. Between the strips of film fed to their actual use, narrow cut strips are cut out and it is the object of this device to break them up. To do this, they run between a pair of guide rollers into a cross-cutting station that works with a star-shaped knife roller. The strips have, when they run into the knife roller, a considerable distance from each other.
  • the invention has for its object to avoid the disadvantages of the prior art.
  • a method and a device are to be specified, with which a trouble-free continuous disposal especially of very thin web material, such as spent embossing foil web, is possible.
  • the invention proposes a method with the features of claim 1 and a disposal device with the features of claim 7.
  • the invention provides that the first web portion as viewed in the feed direction is at least partially adjacent to the second web portion and that the severing at an acute angle or substantially takes place parallel to the feed direction.
  • a longitudinal section or several longitudinal sections which are preferably parallel to each other and in particular performed simultaneously, it is possible to produce narrow strips of sheet material which, if appropriate, can still be shortened by means of suitable cross-sections or transverse cracks. Resulting strips can advantageously remain after the separation still in surface contact with a conveyor carrying them and thus be supplied in an orderly arrangement further disposal steps. In a brief retraction opposite to the feed direction, the longitudinal connection is maintained.
  • a first web section of the material web and a second web section of the web which is preferably arranged at a lateral distance from the first web section, can be held in place and the web can be severed in an intermediate section between the first and second web sections for producing web material pieces.
  • the pieces of web material can then be collected and possibly subjected to further processing steps.
  • embossing foil webs which are usually provided with a carrier film made of tough plastic, tend to be not or only partially incised in cutting units of conventional shredders whose cutting units are in cutting engagement with one another, because of a lack of foil tension and / or clog the reapers.
  • a further embodiment provides that the web material is severed in a between the detained track sections freely suspended and / or taut held intermediate section or separation section.
  • a complete separation can be promoted, because a separator used for separation by the Web material can completely penetrate defined surface.
  • the length of the free intermediate section may be correspondingly less than 1 cm, in particular between about 1 mm and about 5 mm.
  • a preferred embodiment provides that the first web section in the feed direction at the front and the second web section in the feed direction is behind and that the transection is transverse, in particular substantially perpendicular to the feed direction.
  • the respective front track piece can be separated and disposed of easily, while the underlying can still be held and can serve as a front piece of the subsequent separation.
  • By holding the respective rear track section is also ensured that the supplied material web can not slip out of the disposal facility, but is constantly held securely.
  • the separation or cutting behavior of the web material adapted method can be used.
  • a method in which the web material is cut for cutting with a free cutting edge that is, with a mechanical separating member that does not require a counter element, such as a counter knife or the like, for producing the separating effect.
  • Corresponding separation devices are particularly durable and wear-resistant, since in particular in the separation area levitating web material a Cutting edge only comes into contact with the (softer) web material. It is also possible that the web material is melted for transection in the intermediate region, in particular along a substantially straight melting line.
  • This variant which can be carried out, for example, by means of a hot-air blower or heated or glowing wire or the like, is particularly suitable for sheet material with thermoplastic material.
  • An advantageous variant is characterized in that the web material for transection in the intermediate region at many, preferably linearly arranged locations, preferably simultaneously, perforated and the perforations are then increased to grow together.
  • This method which can be carried out for example by means of an imprinted sawtooth blade, is particularly suitable for cutting through plastic films, requires only slight forces because of the initial punctiform action of a separating member on the film web to produce sufficient separating pressures, and can be used particularly advantageously for stretched web material in which the enlargement of the perforations can be supported in part by independently progressing cracks in the tensioned material.
  • a further embodiment provides that for holding a web portion is pressed onto a moving in the direction of pressure surface under construction of static friction or sliding friction.
  • a pressure surface of, for example, one or more square centimeters for a secure hold little force.
  • material damage to the web material which could lead to an unintentional crack, is reliably prevented by the surface engagement of the holding force.
  • a track section is so-to-say held from below, while the side facing away from the pressure surface remains free of retaining means, which in particular sufficient space for attachment of a suitable separating device can be created.
  • a pressure surface may in particular be formed by an outer surface of a revolving conveying element of a suction conveyor, for example a suction belt, in particular a suction roll.
  • the disposal may include a step subsequent to the separation of collected pieces of material.
  • a step subsequent to the separation of collected pieces of material Preference is given to a method in which, after the severing, the web material pieces are detached from a moving contact surface carrying and / or holding them. This can be done, for example, by means of a spatula, doctor blade or the like, but is preferably carried out without contact by means of at least one air flow which lifts the web material pieces from the pressure surface, in particular sucks. Blow-off and suction can also be used in combination for detachment.
  • the packing density may preferably be increased by compressing the collected pieces of web material, preferably batchwise, for example to less than one half, one quarter or one eighth of the packing volume in the relaxed, uncompressed state.
  • the compacted example in a baler waste can then be stored to save space and / or transported away.
  • the invention enables a continuous disposal of used web material, which in particular also in thin films runs smoothly, so that disposal-related stoppages can be avoided and can be increased according to the throughput of the web material processing facility.
  • a disposal device suitable for carrying out the method has a separating device which carries out a longitudinal section for severing the web material in an intermediate section or separating section situated between web sections.
  • the device may comprise first holding means for holding a first web section flat, second holding means for holding at least one second web section flat, and at least one contact surface movable in the feed direction, to which the web sections can be pressed flatly.
  • the holding means can be formed by an endlessly circulating conveying means, such as a conveyor belt or a conveying roller, on which a longitudinal section of the web material rests flat. It is possible that the pressure surface is moved with the feed path speed, so that can build up between the web material and pressure surface stiction. It is also possible to move the pressure surface with a higher speed or excess speed relative to the supplied material, so that there is a slip between pressure surface and material web under construction of sliding friction.
  • the pressure can be made from the side opposite the pressure surface, for example, gentle on the material by means of brushes or the like.
  • the holding means are formed by a suction conveyor, in particular a suction roll, which has at least one conveying element which revolves at a feed speed or at a peripheral speed which is higher than the feed speed and has an outer surface serving as a pressure surface, to which a web section and the intermediate section or separating section comprehensive longitudinal section of the web material is sucked.
  • the pressure surface has at least one recess that can be bridged or braced by the web material and preferably extends transversely to the direction of movement. In the region of the recess, a portion of the pressed-on web material can be kept freely suspended and / or taut without any contact with the substrate, which promotes reliable separation in this area.
  • a separating device preferably has at least one movable separating member which is controlled in such a way that it cuts through the moving web material in the region of the recess bridged over freely by the web material.
  • the separating device may comprise at least one synchronized with the rotating conveyor, on its circumference at least one preferably transverse to the circumferential direction bearing separating member supporting rotary member which is arranged to the conveyor, that a separating member meshes with an associated recess or engages in this.
  • a particularly suitable for the cutting of embossing foil webs or other plastic films execution is characterized in that the separating member is a cutting blade, in particular with a serrated edge through which punctiform perforations initially arise at low contact pressure when the release member in the web material, which, if necessary . supported by the residual stress of the web material, at further Enlarge penetration of the cutting member and eventually grow together to form a continuous cut.
  • FIG. 1 schematically shows some elements of a transport device 1 for transporting a stamping foil web 2 in a hot embossing rotary machine.
  • This serves, for example, for embossing successive sheets or a web of paper, cardboard or plastic.
  • It has an embossing unit 3 with a horizontal embossing cylinder 4 and an approximately equal, underlying impression cylinder 5, between which an embossing gap 6 is formed.
  • the embossing cylinder 4 has along its circumference at least one heatable embossing die 7, is impressed in the figure on a passing through the embossing gap 6 with uniform web speed material layer 8 arranged on the embossing film web 2 embossing unit.
  • the stamping foil web 2 has a rear side 9 and a sensitive, hot-adhesive layer having front 10 and runs during a stamping interval shown in the same speed and in the same direction of movement 11 through the embossing gap 6, whereby transferred under the influence of pressure and temperature, the embossing unit to the material layer becomes.
  • the device may correspond to the rotary machine described in EP 0 718 099, the relevant features of which are incorporated herein by reference.
  • An embossing foil web starting from a non-illustrated, serving as a film supply unwinding storage roll through a film loop storage through a guide roller 15 to a controllable by a drive motor 16 control roller 17, which is followed by a embossing foil web to the embossing 6 deflecting guide roller 18.
  • the control roller 17 is formed as a suction roll and with respect to the direction of rotation and / or rotational speed controllable and controlled extent and direction of the film web movement through the embossing gap. It works with a not shown, the embossing gap 6 downstream guide roller 19 downstream draw device together, which serves to maintain a suitable web tension of the embossing foil in Recgespalt Scheme and the further transport of the spent embossing foil web. This is guided by a further film loop storage, not shown, to a continuously operating disposal device 25. In this embodiment, the web speed at which the film web leaves the film store corresponds to the feed web speed with which the material is supplied to the disposal device 25.
  • the disposal device 25 comprises a driven by a speed-controllable motor 26 transport roller 27, a cooperating with this separator 28 and one on the Extent of the suction roller directed, the separator 28 in the direction of rotation 29 of the suction roller downstream suction device 30th
  • the transport roller 27 is formed as a vacuum roller or suction roller. It has a fixed roller core 31, about which a roller sleeve 33, which is provided along its circumference with radially continuous openings 32, rotates.
  • the roll core 31 is formed in the shape of a cylinder sector and has a semi-cylindrical, open to the imaginary edge of the cylinder recess 44. Roll core and roll sleeve are sealed against each other so that the cavity formed in the recess only in the region adjacent to the openings 32 for cylindrical curved outer surface of the roller or the environment is open. In this region comprising approximately 180 °, the suction roller 27 is looped around by the embossing film web 2 coming from the deflection roller 19 and running in the direction of the suction direction 30.
  • groove-shaped recesses 34, 35 are provided on the circumference of the roller sleeve 33. It can also be provided only one recess or more than two, preferably arranged in the circumferential direction at regular intervals recesses.
  • the recesses shown schematically have a width of about 0.5 cm in the circumferential direction, go over the entire width of the roller sleeve and separate each one in the circumferential direction of the front portion 36 of the cylindrical peripheral surface of the roller from a distance behind the rear section 37.
  • the sections 36, 37 form in the feed direction of the embossing foil web movable, cylindrically curved pressure surfaces on which each of the lying thereon web sections with running suction fan under construction of stiction are pressed by passing between the suction roll surface and web material in the area the recess 44, a negative pressure is generated.
  • first holding means are formed in the region of the front section 36 and second holding means are formed in the region of the rear section 37, by means of which a resting stamping foil web is held over a large area.
  • the cooperating with the suction roller 27 separator 28 has a driven by the motor 26, synchronized with the roller sleeve 33 rotating cylindrical member 39, on the circumference of a transversely aligned to the circumferential direction separating member 40 is arranged in the form of a cutting blade with jagged, radially outwardly standing cutting edge ,
  • the suction roller 27 and the rotating blade carrier 39 of the separator are arranged to each other and synchronized driven that the separating member 40 alternately engages in each revolution of the roller 39 in one of the recesses 34, 35 approximately centrally between the Ausnaturalungsr selectedn, but without the bottom of the recess touch.
  • suction roller 27 conveying element of the drawing along its circumference one, but preferably a plurality of mutually parallel circumferential recesses, in the area fixed or equally circulating separating members, such as cutting blades intervene to cut the web into narrow longitudinal strips.
  • the suction device 30 has a suction nozzle 45, which is connected to a suction fan, not shown, and the suction roller 27 facing suction opening 46 is arranged at a small radial distance from the circumferential surface of the roller sleeve 33 in a circumferential region of the roller, in which the suction openings 32 coming from the recess 44 in the Run in the area of the openings covering the roller core 31. In this area, the vacuum force caused by the holding force is released by the sealing of the suction openings, so that a slight lifting of the still lying on the peripheral surface and possibly still adhering web material is guaranteed.
  • the device can work according to the following procedure. Before starting the embossing device, a free end portion of the embossing foil web is guided through the embossing gap and around the guide roller 19, etc., to the portion of the suction roller 27 provided with effective suction openings, where the free end portion is securely held by negative pressure.
  • the device is running and in the direction of the rotating roller sleeve 29, continuously fed web material is drawn in and arrives in each case on the separator section 28 upstream peripheral portion 37 in areal adhesion to the peripheral surface of the sleeve.
  • the speed of the sleeve surface corresponds in the circumferential direction of the feed path speed of the film web 2, so that they take along under construction of static friction without slipping or pulled by the suction roller 27 from the upstream film storage.
  • the recess is bridged by the embossing foil web under tension. The bridged region continues to run towards the separating device 28 while the film web is being pulled onto the holding section following the recess.
  • the serrated edge of the circulating separating member 40 runs on a circular path which intersects in the region of the connecting line between the axes of rotation of suction roller 27 and rotary member 39 with the cylindrical peripheral surface of the suction roll.
  • the separating member When entering an overstretched recess in the region of the separator, the separating member initially sets on the outside of the tensioned film and is continuously further in rotation to the position shown in Fig. 1, in which the blade points directly to the axis of rotation of the suction roll the interior of the recess pressed. Beyond the position shown maximum penetration depth, the separating member pulls back by the opposite rotation of the rotary members 27, 39 back out of the region of the recess.
  • the saw teeth press on expanding the perforations further into the recess, until finally Perforations grow together and in the direction of circulation in front of the recess located, detaching surface on the front portion 36 adhering part of the material web from the adhering to the rear pressing surface 37 section.
  • the suction openings covered by the front section are covered by the roller core 31 on the inside, so that the suction effect is eliminated and the material piece is not covered by the rest of the stamping foil web can be vacuumed easily.
  • the peripheral speed of the suction roller 27 is equal to the feed path speed
  • the peripheral speed of a rotating conveyor element at least temporarily, but preferably continuously larger than that
  • To choose feed path speed which builds up between the web and the corresponding pressure surfaces no static friction, but sliding friction or slip occurs. This causes the conveyor element of the disposal facility gently and smoothly, but steadily pulls the supplied web material.
  • the web material is briefly withdrawn against the direction of rotation of the conveying element in the direction of the embossing gap.
  • the length of the pressure surface in the circumferential direction can be suitably chosen so that complete slipping or pulling the web from the conveyor element is reliably prevented.
  • Such a conveying device of the disposal device can cooperate with a cross-sectional and / or longitudinal cutting separator. It can be used particularly advantageous slitter whose fixed or moving, in particular rotating separating members can cause a separation of the web material largely independent of the prevailing web speed of the web material supplied to them.
  • cross-cutters in a modification of the described embodiment, for example, be such that a rotating separating member rotates at a deviating from the peripheral speed of the suction conveyor rotational speed, which may be controlled depending on the actual feed path speed, if necessary, to tearing or plucking at the web material to be separated to prevent or minimize.
  • the disposal facility can form a traction device with slip drive for the web 2, which cooperates with the pre-nip upstream control roller 17 for continuous or discontinuous movement of the embossing film through the embossing gap.
  • a separate pulling device as for example by the suction conveyor formed with slip drive EP 0 718 099, omitted. It is also possible, if necessary, to dispense with a film store that may be arranged between embossing gap and disposal facility.
  • a suction conveyor may have a dual function, on the one hand as part of the film acceleration means for the correct movement speed and optionally direction of the embossing film web in the embossing gap and on the other hand acts as a holding means for the spent embossing film web in the continuous disposal.
  • Disposal facilities according to the invention work reliably even at high throughput speeds of the web material and are outstandingly suitable both for severing thicker, stiffer web material, such as paper or the like, but in particular for reliable fragmentation of thin film material.
  • the created possibility of a trouble-free, continuous disposal of used web material makes it possible to operate corresponding facilities for processing the web material without disposal-related downtimes to achieve higher performance.

Landscapes

  • Preliminary Treatment Of Fibers (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Paper (AREA)
  • Advancing Webs (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Details Of Cutting Devices (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

The web (2) is cut in an intermediate layer between a first web section (36) and at least one additional second web section (37). At least part of the first section is next to the second section and the separation is carried out at an acute angle or parallel to the web feed direction (11). Independent claims are also included for (a) the disposal device, comprising a separation device (28) used to make a length direction cut in the intermediate section of the web and (b) an embossing machine with at least one of the disposal devices located after the embossing nip (6).

Description

Die Erfindung betrifft ein Verfahren zur Entsorgung von flexiblem Material, das in Form mindestens einer bewegten Materialbahn vorliegt, die in einer Zufuhrrichtung mit einer Zufuhrbahngeschwindigkeit einer Entsorgungseinrichtung zugeführt wird, insbesondere zur Entsorgung von verbrauchter Prägefolienbahn während des Betriebes einer Heißprägevorrichtung.The invention relates to a method for disposing of flexible material which is in the form of at least one moving material web which is fed in a feed direction with a feed path speed of a disposal device, in particular for disposal of spent embossing film web during the operation of a hot stamping device.

Beim Heißprägen wird in einer Heißprägevorrichtung eine zu beprägende Materiallage mit konstanter Geschwindigkeit durch einen Prägespalt geführt, der zwischen einem ein Prägewerkzeug aufweisenden Prägezylinder und einem Gegendruckelement, insbesondere einem Gegendruckzylinder, gebildet ist. Über der Materiallage wird eine Prägefolienbahn so mitbewegt, daß sie sich während eines Prägeintervalls mit gleicher Geschwindigkeit wie die Materiallage bewegt. Während des Prägeintervalls wird auf der Prägefolienbahn befindliches Prägegut, beispielsweise diskrete hintereinanderliegende Prägeeinheiten wie Bilder oder Texte, oder ein aufzuprägender Teil einer Farbschicht, unter Einwirkung von Druck und Temperatur auf die Materiallage übertragen. Die Prägefolienbahn wird dabei durch eine geeignet ausgebildete Transporteinrichtung von einem vorzugsweise rollenförmigen Folienvorrat abgezogen und durch den Prägespalt bewegt, und die verbrauchte Prägefolie wird weggeführt und muß entsorgt werden.In hot embossing, a material layer to be embossed is guided in a hot embossing device at constant speed through an embossing gap which is formed between an embossing cylinder having an embossing tool and a counterpressure element, in particular an impression cylinder. An embossing foil web is moved over the material layer in such a way that it moves at the same speed as the material layer during a stamping interval. During the embossing interval, embossing material located on the embossing foil web, for example discrete embossing units lying one behind the other, such as images or texts, or a aufzuprägender part of a color layer, transferred under the action of pressure and temperature on the material layer. The embossing foil web is drawn off by a suitably formed transport device of a preferably roll-shaped film supply and moved through the embossing gap, and the spent embossing foil is carried away and must be disposed of.

Bei bekannten Heißprägevorrichtungen dieser Art erfolgt die Entsorgung, indem die verbrauchte Prägefolienbahn auf einer Aufwickel-Speicherrolle aufgewickelt wird. Wenn die Rolle auf der Abfallseite voll ist, muß für einen Rollenwechsel der Prägevorgang bzw. die Zufuhr zur Abfallrolle unterbrochen werden. Dies verursacht normalerweise die Gesamtprägeleistung herabsetzende Maschinenstillstandszeiten. Zudem kann es beim Anhalten der Anlage oder beim Wiederanfahren zu Betriebsstörungen und/oder zur Erzeugung von Ausschuß beim beprägten Material kommen. Zur Vermeidung derartiger Probleme wird eine kontinuierliche Entsorgung verbrauchten Bahnmaterials angestrebt.In known hot embossing devices of this type, the disposal takes place by the spent embossing film web is wound on a take-up storage roll. If the roll is full on the waste side, the embossing process or the supply to the waste roll must be interrupted for a roll change. This usually causes the overall stamping performance to degrade machine downtime. In addition, when stopping the system or when restarting it can lead to malfunction and / or the production of rejects in the embossed material. To avoid such problems, continuous disposal of spent web material is desired.

Eine aus der GB 2 254 586 (nächstkommender Stand der Technik) bekannte Prägevorrichtung hat auf der Abfallseite eine nach Art eines Schredders bzw. Dokumentenvemichters arbeitende Entsorgungseinrichtung, der das verbrauchte Bahnmaterial mittels einer vorgeschalteten Förderstation zugeführt wird. Diese hat zwei gegenläufig drehende Transportwalzen, zwischen denen das Bahnmaterial eingeklemmt und hindurchgefördert wird. Das abfuhrseitig aus der Fördereinrichtung heraustretende freie Ende des Bahnmaterials gelangt in den Einfuhrschlitz des Schredders, der das Bahnmaterial in kleine Bahnmaterialstücke zerreißt und in einen Sammelbehälter fördert, der von Zeit zu Zeit geleert wird. Insbesondere bei relativ dünnem, wenig eigensteifem Bahnmaterial kann es im Schneidwerk von Schreddern zu Funktionsstörungen, beispielsweise durch unvollständiges Zerreißen des Materials oder durch Verstopfen des Schneidwerks, kommen.An embossing device known from GB 2 254 586 (closest prior art) has on the waste side a disposal device operating in the manner of a shredder or documentary printer, to which the used web material is fed by means of an upstream conveying station. This has two counter-rotating transport rollers, between which the web material is clamped and conveyed through. The discharge end of the conveyor emerging free end of the web material enters the insertion slot of the shredder, which ruptures the web material into small pieces of web material and promotes a collection container, which is emptied from time to time. Especially with relatively thin, less intrinsically stiff web material, shredders can cause malfunctions in the cutting unit, for example due to incomplete tearing of the material or due to clogging of the cutting unit.

Die deutsche Patentschrift DE 648 075 zeigt einen Querschneider für Papierbahnen mit zwei umlaufenden Trommeln, von denen eine vom Bahnmaterial teilweise umschlungen wird und eine Aussparung aufweist, die vom Bahnmaterial überspannt wird, während die andere ein mit dieser Trommel synchronisiertes umlaufendes Messer aufweist, welches das die Aussparrung überspannende Bahnmaterial durchtrennt. Ein ähnlicher Querschneider, der zum Zertrennen von Zigarettenpapier vorgesehen ist, ist aus der DE 37 30 810 bekannt.The German patent DE 648 075 shows a cross cutter for paper webs with two rotating drums, one of which is partially wrapped by the web material and having a recess which is spanned by the web material, while the other has a synchronized with this drum rotating knife, which the Cutout spanning spanning web material severed. A similar cross cutter, which is intended for dicing cigarette paper, is known from DE 37 30 810.

Die DE 40 21 573 A1 zeigt eine Vorrichtung zum Abführen und Zerkleinern von Beschnittstreifen kalandrierter Folie. Zwischen den ihrer eigentlichen Nutzung zugeführten Folienstreifen werden schmale Beschnittstreifen herausgeschnitten und es ist Aufgabe dieser Vorrichtung, sie zu zerkleinern. Dazu laufen sie zwischen einem Leitwalzenpaar hindurch in eine Querschneidestation, die mit einer sternförmigen Messerwalze arbeitet. Die Streifen haben, wenn sie in die Messerwalze einlaufen, einen erheblichen Abstand voneinander.DE 40 21 573 A1 shows a device for removing and crushing cut strips calendered film. Between the strips of film fed to their actual use, narrow cut strips are cut out and it is the object of this device to break them up. To do this, they run between a pair of guide rollers into a cross-cutting station that works with a star-shaped knife roller. The strips have, when they run into the knife roller, a considerable distance from each other.

Der Erfindung liegt die Aufgabe zugrunde, die Nachteile des Standes der Technik zu vermeiden. Insbesondere sollen ein Verfahren und eine Vorrichtung angegeben werden, mit denen eine störungsfreie kontinuierliche Entsorgung insbesondere auch von sehr dünnem Bahnmaterial, wie verbrauchter Prägefolienbahn, möglich ist.The invention has for its object to avoid the disadvantages of the prior art. In particular, a method and a device are to be specified, with which a trouble-free continuous disposal especially of very thin web material, such as spent embossing foil web, is possible.

Zur Lösung dieser Aufgabe schlägt die Erfindung ein Verfahren mit den Merkmalen von Anspruch 1 und eine Entsorgungsvorrichtung mit den Merkmalen von Anspruch 7 vor.To solve this problem, the invention proposes a method with the features of claim 1 and a disposal device with the features of claim 7.

Die Erfindung sieht vor, daß der erste Bahnabschnitt in Zufuhrrichtung gesehen mindestens abschnittsweise neben dem zweiten Bahnabschnitt liegt und daß die Durchtrennung im spitzen Winkel oder im wesentlichen parallel zur Zufuhrrichtung erfolgt. Durch einen Längsschnitt oder mehrere vorzugsweise zueinander parallele, insbesondere gleichzeitig durchgeführte Längsschnitte können ggf. schmale Streifen von Bahnmaterial erzeugt werden, die ggf. noch durch geeignete Querschnitte oder Querrisse verkürzt werden können. Entstehende Streifen können vorteilhaft nach der Trennung noch in flächiger Berührung mit einer sie tragenden Fördereinrichtung bleiben und damit in geordneter Anordnung weiteren Entsorgungsschritten zugeführt werden. Bei einem kurzzeitigen Zurückziehen entgegen der Zufuhrrichtung bleibt die Längsverbindung erhalten.The invention provides that the first web portion as viewed in the feed direction is at least partially adjacent to the second web portion and that the severing at an acute angle or substantially takes place parallel to the feed direction. By means of a longitudinal section or several longitudinal sections which are preferably parallel to each other and in particular performed simultaneously, it is possible to produce narrow strips of sheet material which, if appropriate, can still be shortened by means of suitable cross-sections or transverse cracks. Resulting strips can advantageously remain after the separation still in surface contact with a conveyor carrying them and thus be supplied in an orderly arrangement further disposal steps. In a brief retraction opposite to the feed direction, the longitudinal connection is maintained.

Zusätzlich kann ein erster Bahnabschnitt der Materialbahn und ein vorzugsweise mit einem lateralen Abstand von dem ersten Bahnabschnitt angeordneter zweiter Bahnabschnitt der Materialbahn festgehalten werden und die Materialbahn in einem zwischen dem ersten und dem zweiten Bahnabschnitt liegenden Zwischenabschnitt zur Erzeugung von Bahnmaterialstücken durchtrennt werden. Die Bahnmaterialstücke können anschließend gesammelt und ggf. weiteren Bearbeitungsschritten unterworfen werden. Durch das vorzugsweise flächige Festhalten des Bahnmaterials beidseitig des Trennbereiches kann erreicht werden, daß das Bahnmaterial während des Trennvorganges nicht in den Bereich der Trennung eingezogen wird, also nicht einem vorzugsweise mechanisch einwirkenden Trennorgan nachgibt, sondern diesem einen die Trennung erleichternden Widerstand entgegensetzt. Dies ist insbesondere vorteilhaft bei sehr dünnem, eine geringe Eigensteifigkeit aufweisendem Bahnmaterial, wie beispielsweise Prägefolienbahnen, deren typische Dicken im Bereich zwischen 10 und 20 µm liegen können. Derartige meist mit einem Trägerfilm aus zähem Kunststoff versehene Prägefolienbahnen neigen in Schneidwerken herkömmlicher Schredder, deren Schneidwerke in Schneideingriff miteinander stehende Schneidwalzen aufweisen, wegen mangelnder Folienspannung dazu, nicht oder nur unvollständig zertrennt zu werden und/oder die Schneidwerke zu verstopfen. Durch das erfindungsgemäße Festhalten des Bahnmaterials beidseitig des Trennabschnittes bzw. Zwischenabschnittes wird das Bahnmaterial im Trennabschnitt unter Spannung gehalten, was eine leichte, zuverlässige und vollständige Trennung begünstigt.In addition, a first web section of the material web and a second web section of the web, which is preferably arranged at a lateral distance from the first web section, can be held in place and the web can be severed in an intermediate section between the first and second web sections for producing web material pieces. The pieces of web material can then be collected and possibly subjected to further processing steps. By preferably flat retention of the web material on both sides of the separation region can be achieved that the web material is not drawn during the separation process in the region of separation, so does not give a preferably mechanically acting separating member, but this one opposes the separation facilitating resistance. This is particularly advantageous in the case of very thin web material having a low intrinsic stiffness, such as, for example, stamping foil webs, whose typical thicknesses can be in the range between 10 and 20 μm. Such embossing foil webs, which are usually provided with a carrier film made of tough plastic, tend to be not or only partially incised in cutting units of conventional shredders whose cutting units are in cutting engagement with one another, because of a lack of foil tension and / or clog the reapers. By holding the web material according to the invention on both sides of the separating section or intermediate section, the web material is kept under tension in the separating section, which promotes easy, reliable and complete separation.

Eine Weiterbildung sieht vor, daß das Bahnmaterial in einem zwischen den festgehaltenen Bahnabschnitten frei schwebenden und/oder gespannt gehaltenen Zwischenabschnitt bzw. Trennabschnitt durchtrennt wird. Hierdurch kann eine vollständige Durchtrennung gefördert werden, weil ein zur Trennung verwendetes Trennorgan die durch das Bahnmaterial definierte Fläche vollständig durchdringen kann. Zur Erzielung einer zuverlässigen Trennung ist es vorteilhaft, die Länge des frei schwebenden, also nicht in Berührungskontakt mit einer Unterlage stehenden Zwischenabschnittes möglichst kurz zu halten, um ein durch Dehnungselastizität des zu durchtrennenden Bahnmaterials begünstigtes Ausweichen des Bahnmaterials beim Durchtrennen zu minimieren. Die Länge des freien Zwischenabschnittes kann entsprechend weniger als 1 cm betragen, insbesondere zwischen ca. 1 mm und ca. 5 mm liegen.A further embodiment provides that the web material is severed in a between the detained track sections freely suspended and / or taut held intermediate section or separation section. In this way, a complete separation can be promoted, because a separator used for separation by the Web material can completely penetrate defined surface. In order to achieve a reliable separation, it is advantageous to keep the length of the free-floating intermediate section, which is not in contact with a support, as short as possible in order to minimize dodging of the web material when it is severed by elasticity of the web material to be severed. The length of the free intermediate section may be correspondingly less than 1 cm, in particular between about 1 mm and about 5 mm.

Eine bevorzugte Weiterbildung sieht vor, daß der erste Bahnabschnitt in Zufuhrrichtung vorne und der zweite Bahnabschnitt in Zufuhrrichtung hinten liegt und daß die Durchtrennung quer, insbesondere im wesentlichen senkrecht zur Zufuhrrichtung erfolgt. Bei dieser normalerweise über die gesamte Breite der Materialbahn geführten Quertrennung kann das jeweils vorne liegende Bahnstück abgetrennt und leicht entsorgt werden, während das dahinterliegende noch festgehalten werden kann und als vorderes Stück der darauffolgenden Trennung dienen kann. Durch das Festhalten des jeweils hinteren Bahnabschnittes ist auch gewährleistet, daß die zugeführte Materialbahn nicht aus der Entsorgungseinrichtung rutschen kann, sondern ständig sicher gehalten ist.A preferred embodiment provides that the first web section in the feed direction at the front and the second web section in the feed direction is behind and that the transection is transverse, in particular substantially perpendicular to the feed direction. In this usually across the entire width of the web guided cross-separation, the respective front track piece can be separated and disposed of easily, while the underlying can still be held and can serve as a front piece of the subsequent separation. By holding the respective rear track section is also ensured that the supplied material web can not slip out of the disposal facility, but is constantly held securely.

Zur Durchtrennung des Bahnmaterials können unterschiedliche, vorzugsweise dem Trenn- bzw. Schnittverhalten des Bahnmaterials angepaßte Verfahren eingesetzt werden. Besonders bevorzugt ist ein Verfahren, bei dem das Bahnmaterial zur Durchtrennung mit freier Schneide geschnitten wird, also mit einem mechanischen Trennorgan, das zur Erzeugung der Trennwirkung kein Gegenelement, wie ein Gegenmesser oder dergleichen, benötigt. Entsprechende Trennvorrichtungen sind besonders langlebig und verschleißarm, da insbesondere bei im Trennbereich frei schwebendem Bahnmaterial eine Schneide nur mit dem (weicheren) Bahnmaterial in Kontakt kommt. Es ist auch möglich, daß das Bahnmaterial zur Durchtrennung im Zwischenbereich aufgeschmolzen wird, insbesondere entlang einer im wesentlichen geraden Schmelzlinie. Diese beispielsweise mittels Heißluftgebläse oder aufgeheiztem bzw. glühendem Draht oder dergleichen durchführbare Variante ist besonders für Bahnmaterial mit thermoplastischem Kunststoff geeignet. Eine vorteilhafte Variante zeichnet sich dadurch aus, daß das Bahnmaterial zur Durchtrennung im Zwischenbereich an vielen, vorzugsweise linienartig angeordneten Stellen, vorzugsweise gleichzeitig, perforiert wird und die Perforationen anschließend bis zum Zusammenwachsen vergrößert werden. Dieses beispielsweise mittels eines aufgedrückten Sägezahnmessers durchführbare Verfahren eignet sich besonders zur Durchtrennung von Kunststofffolien, erfordert wegen der anfänglich punktförmigen Einwirkung eines Trennorgans auf die Folienbahn zur Erzeugung ausreichender Trenndrücke nur geringe Kräfte und kann besonders vorteilhaft bei gespanntem Bahnmaterial eingesetzt werden, bei dem die Vergrößerung der Perforationen zum Teil durch selbständig fortschreitende Risse im gespannten Material unterstützt werden kann.For the separation of the web material different, preferably the separation or cutting behavior of the web material adapted method can be used. Particularly preferred is a method in which the web material is cut for cutting with a free cutting edge, that is, with a mechanical separating member that does not require a counter element, such as a counter knife or the like, for producing the separating effect. Corresponding separation devices are particularly durable and wear-resistant, since in particular in the separation area levitating web material a Cutting edge only comes into contact with the (softer) web material. It is also possible that the web material is melted for transection in the intermediate region, in particular along a substantially straight melting line. This variant, which can be carried out, for example, by means of a hot-air blower or heated or glowing wire or the like, is particularly suitable for sheet material with thermoplastic material. An advantageous variant is characterized in that the web material for transection in the intermediate region at many, preferably linearly arranged locations, preferably simultaneously, perforated and the perforations are then increased to grow together. This method, which can be carried out for example by means of an imprinted sawtooth blade, is particularly suitable for cutting through plastic films, requires only slight forces because of the initial punctiform action of a separating member on the film web to produce sufficient separating pressures, and can be used particularly advantageously for stretched web material in which the enlargement of the perforations can be supported in part by independently progressing cracks in the tensioned material.

Eine Weiterbildung sieht vor, daß zum Festhalten ein Bahnabschnitt auf eine in Zufuhrrichtung bewegte Andruckfläche unter Aufbau von Haftreibung oder Gleitreibung aufgedrückt wird. Gegenüber einem ebenfalls möglichen, im wesentlichen punkt- oder linienförmigen Festhalten erfordert das hierdurch mögliche großflächige Festhalten auf einer Andruckfläche von beispielsweise einem oder mehreren Quadratzentimetern für einen sicheren Halt wenig Kraft. Weiterhin wird durch das flächige Angreifen der Haltekraft eine Materialbeschädigung des Bahnmaterials, die zu einem unbeabsichtigten Riß führen könnte, zuverlässig vermieden. Ganz besonders bevorzugt ist es, wenn zum Festhalten eines Bahnabschnittes zwischen diesem und der Andruckfläche ein Unterdruck erzeugt wird. Ein Bahnabschnitt wird so-zusagen von unten gehalten, während die der Andruckfläche abgewandte Seite frei von Haltemitteln bleibt, wodurch insbesondere genügend Bauraum zur Anbringung einer geeigneten Trennvorrichtung geschaffen werden kann. Eine Andruckfläche kann insbesondere durch eine Außenfläche eines umlaufenden Förderelementes eines Saugförderers gebildet sein, beispielsweise eines Saugbandes, insbesondere einer Saugwalze.A further embodiment provides that for holding a web portion is pressed onto a moving in the direction of pressure surface under construction of static friction or sliding friction. Compared to a likewise possible, substantially point- or line-shaped retention, this allows possible large-area holding on a pressure surface of, for example, one or more square centimeters for a secure hold little force. Furthermore, material damage to the web material, which could lead to an unintentional crack, is reliably prevented by the surface engagement of the holding force. It is particularly preferred if a negative pressure is generated for holding a web section between it and the pressure surface. A track section is so-to-say held from below, while the side facing away from the pressure surface remains free of retaining means, which in particular sufficient space for attachment of a suitable separating device can be created. A pressure surface may in particular be formed by an outer surface of a revolving conveying element of a suction conveyor, for example a suction belt, in particular a suction roll.

Die Entsorgung kann einen der Durchtrennung nachfolgenden Schritt des Sammelns abgetrennter Materialstücke umfassen. Bevorzugt ist ein Verfahren, bei dem nach der Durchtrennung die Bahnmaterialstücke von einer sie tragenden und/oder haltenden, bewegten Andruckfläche abgelöst werden. Dies kann beispielsweise unter Berührung mittels eines Spatels, Rakels oder dergleichen erfolgen, wird jedoch bevorzugt berührungslos mittels mindestens eines Luftstromes durchgeführt, der die Bahnmaterialstücke von der Andruckfläche abhebt, insbesondere absaugt. Abblasen und Absaugen können auch kombiniert zur Ablösung eingesetzt werden.The disposal may include a step subsequent to the separation of collected pieces of material. Preference is given to a method in which, after the severing, the web material pieces are detached from a moving contact surface carrying and / or holding them. This can be done, for example, by means of a spatula, doctor blade or the like, but is preferably carried out without contact by means of at least one air flow which lifts the web material pieces from the pressure surface, in particular sucks. Blow-off and suction can also be used in combination for detachment.

Durch die kontinuierliche Zerstückelung des Bahnmaterials in kleine Bahnmaterialstücke wird eine platzsparende Verpackung des verbrauchten Materiales begünstigt, da kleine Materialstücke mit größeren Packungsdichten verstaubar sind. Die Packungsdichte kann vorzugsweise dadurch gesteigert werden, daß die gesammelten Bahnmaterialstücke, vorzugsweise chargenweise, komprimiert werden, beispielsweise auf weniger als die Hälfte, ein Viertel oder ein Achtel des Packvolumens im lockeren, unkomprimierten Zustand. Der beispielsweise in einer Ballenpresse kompaktierte Abfall kann anschließend platzsparend verwahrt und/oder abtransportiert werden.Due to the continuous fragmentation of the web material into small pieces of web material, a space-saving packaging of the used material is favored, since small pieces of material with larger packing densities can be stowed. The packing density may preferably be increased by compressing the collected pieces of web material, preferably batchwise, for example to less than one half, one quarter or one eighth of the packing volume in the relaxed, uncompressed state. The compacted example in a baler waste can then be stored to save space and / or transported away.

Die Erfindung ermöglicht eine kontinuierliche Entsorgung verbrauchten Bahnmaterials, wobei diese insbesondere auch bei dünnen Folien störungsfrei verläuft, so daß entsorgungsbedingte Stillstände vermieden werden können und sich entsprechend die Durchsatzleistung der bahnmaterialverarbeitenden Einrichtung erhöhen läßt.The invention enables a continuous disposal of used web material, which in particular also in thin films runs smoothly, so that disposal-related stoppages can be avoided and can be increased according to the throughput of the web material processing facility.

Eine zur Durchführung des Verfahrens geeignete Entsorgungseinrichtung hat eine einen Längsschnitt ausführende Trenneinrichtung zur Durchtrennung des Bahnmaterials in einem zwischen Bahnabschnitten liegenden Zwischenabschnitt bzw. Trennabschnitt.A disposal device suitable for carrying out the method has a separating device which carries out a longitudinal section for severing the web material in an intermediate section or separating section situated between web sections.

Die Vorrichtung kann erste Haltemittel zum flächigen Festhalten eines ersten Bahnabschnittes, zweite Haltemittel zum flächigen Festhalten wenigstens eines zweiten Bahnabschnittes und mindestens eine in Zufuhrrichtung bewegbare Andruckfläche aufweisen, auf die die Bahnabschnitte flächig anpreßbar sind. Insbesondere können die Haltemittel durch ein endlos umlaufendes Fördermittel, wie ein Förderband oder eine Förderwalze gebildet sein, auf dem ein Längsabschnitt des Bahnmaterials flächig aufliegt. Dabei ist es möglich, daß die Andruckfläche mit der Zufuhrbahngeschwindigkeit bewegt wird, so daß sich zwischen Bahnmaterial und Andruckfläche Haftreibung aufbauen kann. Es ist auch möglich, die Andruckfläche mit einer höheren Geschwindigkeit bzw. Überschußgeschwindigkeit gegenüber dem zugeführten Material zu bewegen, so daß sich unter Aufbau von Gleitreibung ein Schlupf zwischen Andruckfläche und Materialbahn ergibt.The device may comprise first holding means for holding a first web section flat, second holding means for holding at least one second web section flat, and at least one contact surface movable in the feed direction, to which the web sections can be pressed flatly. In particular, the holding means can be formed by an endlessly circulating conveying means, such as a conveyor belt or a conveying roller, on which a longitudinal section of the web material rests flat. It is possible that the pressure surface is moved with the feed path speed, so that can build up between the web material and pressure surface stiction. It is also possible to move the pressure surface with a higher speed or excess speed relative to the supplied material, so that there is a slip between pressure surface and material web under construction of sliding friction.

Der Andruck kann von der der Andruckfläche gegenüberliegenden Seite erfolgen, beispielsweise materialschonend mittels Bürsten oder dergleichen. Bei einer bevorzugten Ausführungsform sind die Haltemittel durch einen Saugförderer, insbesondere eine Saugwalze gebildet, der mindestens ein mit Zufuhrgeschwindigkeit oder mit einer gegenüber der Zufuhrgeschwindigkeit höheren Umfangsgeschwindigkeit umlaufendes Förderelement mit einer als Andruckfläche dienenden Außenfläche aufweist, an die ein die Bahnabschnitte und den Zwischenabschnitt bzw. Trennabschnitt umfassender Längsabschnitt des Bahnmaterials ansaugbar ist.The pressure can be made from the side opposite the pressure surface, for example, gentle on the material by means of brushes or the like. In a preferred embodiment, the holding means are formed by a suction conveyor, in particular a suction roll, which has at least one conveying element which revolves at a feed speed or at a peripheral speed which is higher than the feed speed and has an outer surface serving as a pressure surface, to which a web section and the intermediate section or separating section comprehensive longitudinal section of the web material is sucked.

Obwohl es möglich ist, daß eine zugeordnete Trenneinrichtung beispielsweise mit der Andruckfläche in Schneideingriff tritt, ist es bevorzugt, wenn die Andruckfläche mindestens eine von dem Bahnmaterial überbrückbare bzw. überspannbare, vorzugsweise quer zur Bewegungsrichtung verlaufende Ausnehmung aufweist. Im Bereich der Ausnehmung kann ein Abschnitt des aufgedrückten Bahnmaterials ohne Berührungskontakt zur Unterlage frei schwebend und/oder gespannt gehalten sein, was eine zuverlässige Trennung in diesem Bereich begünstigt.Although it is possible that an associated separating device, for example, comes into cutting engagement with the pressure surface, it is preferred if the pressure surface has at least one recess that can be bridged or braced by the web material and preferably extends transversely to the direction of movement. In the region of the recess, a portion of the pressed-on web material can be kept freely suspended and / or taut without any contact with the substrate, which promotes reliable separation in this area.

Eine Trennvorrichtung hat vorzugsweise mindestens ein bewegbares Trennorgan, das derart angesteuert ist, daß es das bewegte Bahnmaterial im Bereich der vom Bahnmaterial frei schwebend überbrückten Ausnehmung durchtrennt. Insbesondere kann die Trennvorrichtung mindestens ein mit dem umlaufenden Fördermittel synchronisiertes, an seinem Umfang mindestens ein vorzugsweise quer zur Umfangsrichtung ausgerichtetes Trennorgan tragendes Rotationselement aufweisen, das derart zu dem Fördermittel angeordnet ist, daß ein Trennorgan mit einer zugeordneten Ausnehmung kämmt bzw. in diese eingreift. Durch das Trennorgan kann das im Bereich der Ausnehmung frei schwebende, ggf. gespannte Bahnmaterial zuverlässig und vollständig durchtrennt werden. Eine besonders zum Zerschneiden von Prägefolienbahnen oder anderen Kunststofffolien geeignete Ausführung zeichnet sich dadurch aus, daß das Trennorgan ein Schneidmesser ist, insbesondere mit einer gezackten Schneide, durch die beim Eingreifen des Trennorgans in das Bahnmaterial zunächst schon bei geringem Anpreßdruck punktförmige Perforationen entstehen, die, ggf. durch die Eigenspannung des Bahnmaterials unterstützt, sich bei weiterem Eindringen des Schneidorgans vergrößern und schließlich zur Bildung eines durchgehenden Schnittes zusammenwachsen.A separating device preferably has at least one movable separating member which is controlled in such a way that it cuts through the moving web material in the region of the recess bridged over freely by the web material. In particular, the separating device may comprise at least one synchronized with the rotating conveyor, on its circumference at least one preferably transverse to the circumferential direction bearing separating member supporting rotary member which is arranged to the conveyor, that a separating member meshes with an associated recess or engages in this. By means of the separating member, the freely suspended, possibly stretched, web material in the region of the recess can be reliably and completely severed. A particularly suitable for the cutting of embossing foil webs or other plastic films execution is characterized in that the separating member is a cutting blade, in particular with a serrated edge through which punctiform perforations initially arise at low contact pressure when the release member in the web material, which, if necessary . supported by the residual stress of the web material, at further Enlarge penetration of the cutting member and eventually grow together to form a continuous cut.

Weitere Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung einer bevorzugten Ausführungsform in Verbindung mit der Zeichnung und den Unteransprüchen. Hierbei können die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Kombination miteinander bei einer Ausführungsform verwirklicht sein. Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt. Es zeigt:

Fig. 1
eine schematische Seitenansicht einer Präge-Rotationsmaschine mit einer erfindungsgemäßen, kontinuierlich arbeitenden Entsorgungseinrichtung.
Further features and details of the invention will become apparent from the following description of a preferred embodiment in conjunction with the drawings and the dependent claims. In this case, the individual features may be implemented individually or in combination with one another in one embodiment. An embodiment of the invention is shown in the drawing. It shows:
Fig. 1
a schematic side view of a stamping-rotating machine with a continuously operating disposal device according to the invention.

In Fig. 1 sind schematisch einige Elemente einer Transporteinrichtung 1 zum Transport einer Prägefolienbahn 2 in einer Heißpräge-Rotationsmaschine gezeigt. Diese dient beispielsweise zum Beprägen von aufeinanderfolgenden Bogen oder einer Bahn aus Papier, Karton oder Kunststoff. Sie hat ein Prägewerk 3 mit einem horizontalen Prägezylinder 4 und einem etwa gleich großen, darunterliegenden Gegendruckzylinder 5, zwischen denen ein Prägespalt 6 gebildet ist. Der Prägezylinder 4 hat entlang seines Umfangs mindestens eine beheizbare Prägematrize 7, durch die in der Figur auf eine durch den Prägespalt 6 mit gleichförmiger Bahngeschwindigkeit durchlaufende Materiallage 8 eine auf der Prägefolienbahn 2 angeordnete Prägeeinheit aufgeprägt wird. Die Prägefolienbahn 2 hat eine Rückseite 9 und eine empfindliche, eine Heißkleberschicht aufweisende Vorderseite 10 und läuft während eines in der Figur gezeigten Prägeintervalls geschwindigkeitsgleich und in gleicher Bewegungsrichtung 11 durch den Prägespalt 6, wodurch unter dem Einfluß von Druck und Temperatur die Prägeeinheit auf die Materiallage übertragen wird.FIG. 1 schematically shows some elements of a transport device 1 for transporting a stamping foil web 2 in a hot embossing rotary machine. This serves, for example, for embossing successive sheets or a web of paper, cardboard or plastic. It has an embossing unit 3 with a horizontal embossing cylinder 4 and an approximately equal, underlying impression cylinder 5, between which an embossing gap 6 is formed. The embossing cylinder 4 has along its circumference at least one heatable embossing die 7, is impressed in the figure on a passing through the embossing gap 6 with uniform web speed material layer 8 arranged on the embossing film web 2 embossing unit. The stamping foil web 2 has a rear side 9 and a sensitive, hot-adhesive layer having front 10 and runs during a stamping interval shown in the same speed and in the same direction of movement 11 through the embossing gap 6, whereby transferred under the influence of pressure and temperature, the embossing unit to the material layer becomes.

Die Vorrichtung kann bzgl. des Aufbaus der Folientransporteinrichtung 1 der in der EP 0 718 099 beschriebenen Rotationsmaschine entsprechen, deren diesbezügliche Merkmale durch Bezugnahme zum Gegenstand dieser Anmeldung gemacht werden. Eine Prägefolienbahn wird, ausgehend von einer nicht gezeigten, als Folienvorrat dienende Abwickel-Speicherrolle durch einen Folienschlaufenspeicher hindurch über eine Umlenkwalze 15 zu einer durch einen Antriebsmotor 16 steuerbaren Steuerwalze 17 geführt, der eine die Prägefolienbahn zum Prägespalt 6 umlenkende Umlenkwalze 18 nachgeschaltet ist. Auf der Zufuhrseite wird durch eine weitere Steuerwalze 17' angedeutet, daß die Anlage zur gleichzeitigen Verarbeitung mehrerer, vorzugsweise unabhängig voneinander steuerbarer, parallel zueinander verlaufende Prägefolienbahnen ausgebildet ist Die Steuerwalze 17 ist als Saugwalze ausgebildet und bzgl. Drehrichtung und/oder Drehgeschwindigkeit steuerbar und kontrolliert Ausmaß und Richtung der Folienbahnbewegung durch den Prägespalt. Sie arbeitet mit einer nicht gezeigten, der dem Prägespalt 6 nachgeschalteten Umlenkwalze 19 nachgeschalteten Zugeinrichtung zusammen, die der Aufrechterhaltung einer geeigneten Bahnspannung der Prägefolienbahn im Prägespaltbereich sowie dem Weitertransport der verbrauchten Prägefolienbahn dient. Diese wird durch einen weiteren, nicht gezeigten Folienschlaufenspeicher zu einer kontinuierlich arbeitenden Entsorgungseinrichtung 25 geführt. Bei dieser Ausführungsform entspricht die Bahngeschwindigkeit, mit der die Folienbahn den Folienspeicher verläßt, der Zufuhrbahngeschwindigkeit, mit der das Material der Entsorgungseinrichtung 25 zugeführt wird.With regard to the construction of the film transport device 1, the device may correspond to the rotary machine described in EP 0 718 099, the relevant features of which are incorporated herein by reference. An embossing foil web, starting from a non-illustrated, serving as a film supply unwinding storage roll through a film loop storage through a guide roller 15 to a controllable by a drive motor 16 control roller 17, which is followed by a embossing foil web to the embossing 6 deflecting guide roller 18. On the supply side is indicated by a further control roller 17 ', that the system for simultaneous processing of several, preferably independently controllable, mutually parallel embossing foil webs is formed The control roller 17 is formed as a suction roll and with respect to the direction of rotation and / or rotational speed controllable and controlled extent and direction of the film web movement through the embossing gap. It works with a not shown, the embossing gap 6 downstream guide roller 19 downstream draw device together, which serves to maintain a suitable web tension of the embossing foil in Prägespaltbereich and the further transport of the spent embossing foil web. This is guided by a further film loop storage, not shown, to a continuously operating disposal device 25. In this embodiment, the web speed at which the film web leaves the film store corresponds to the feed web speed with which the material is supplied to the disposal device 25.

Die Entsorgungseinrichtung 25 umfaßt eine über einen geschwindigkeitssteuerbaren Motor 26 angetriebene Transportwalze 27, eine mit dieser zusammenwirkende Trenneinrichtung 28 sowie eine auf den Umfang der Saugwalze gerichtete, der Trenneinrichtung 28 in Umlaufrichtung 29 der Saugwalze nachgeschaltete Absaugeinrichtung 30.The disposal device 25 comprises a driven by a speed-controllable motor 26 transport roller 27, a cooperating with this separator 28 and one on the Extent of the suction roller directed, the separator 28 in the direction of rotation 29 of the suction roller downstream suction device 30th

Die Transportwalze 27 ist als Unterdruckwalze bzw. Saugwalze ausgebildet. Sie hat einen feststehenden Walzenkern 31, um den eine entlang ihres Umfangs mit radial durchgehenden Öffnungen 32 versehene Walzenhülse 33 rotiert. Der Walzenkern 31 ist in Form eines Zylindersektors ausgebildet und hat eine halbzylinderförmige, zum gedachten Rand des Zylinders geöffnete Ausnehmung 44. Walzenkern und Walzenhülse sind so gegeneinander abgedichtet, daß der im Bereich der Ausnehmung gebildete Hohlraum nur im Bereich der an ihn angrenzenden Öffnungen 32 zur zylindrisch gekrümmten Außenfläche der Walze bzw. zur Umgebung offen ist. In diesem ca. 180° umfassenden Bereich ist die Saugwalze 27 durch die von der Umlenkrolle 19 kommende und zur Absaugrichtung 30 laufende Prägefolienbahn 2 umschlungen.The transport roller 27 is formed as a vacuum roller or suction roller. It has a fixed roller core 31, about which a roller sleeve 33, which is provided along its circumference with radially continuous openings 32, rotates. The roll core 31 is formed in the shape of a cylinder sector and has a semi-cylindrical, open to the imaginary edge of the cylinder recess 44. Roll core and roll sleeve are sealed against each other so that the cavity formed in the recess only in the region adjacent to the openings 32 for cylindrical curved outer surface of the roller or the environment is open. In this region comprising approximately 180 °, the suction roller 27 is looped around by the embossing film web 2 coming from the deflection roller 19 and running in the direction of the suction direction 30.

Am Umfang der Walzenhülse 33 sind zwei einander diametral zur Walzendrehachse gegenüberliegende, parallel zur Drehachse bzw. senkrecht zur Umlaufrichtung 29 ausgerichtete, nutförmige Ausnehmungen 34, 35 vorgesehen. Es können auch nur eine Ausnehmung oder mehr als zwei, vorzugsweise in Umfangsrichtung in regelmäßigen Abständen angeordnete Ausnehmungen vorgesehen sein. Die schematisch gezeigten Ausnehmungen haben in Umfangsrichtung eine Breite von ca. 0,5 cm, gehen jeweils über die gesamte Breite der Walzenhülse und trennen jeweils einen in Umlaufrichtung vorderen Abschnitt 36 der zylindrischen Umfangsfläche der Walze von einem mit Abstand dahinterliegenden hinteren Abschnitt 37. Die Abschnitte 36, 37 bilden in Zufuhrrichtung der Prägefolienbahn bewegbare, zylindrisch gekrümmte Andruckflächen, auf die die jeweils darauf liegenden Bahnabschnitte bei laufendem Sauggebläse unter Aufbau von Haftreibung anpreßbar sind, indem zwischen Saugwalzenoberfläche und Bahnmaterial im Bereich der Ausnehmung 44 ein Unterdruck erzeugt wird. Dadurch sind im Bereich des vorderen Abschnitts 36 erste Haltemittel und im Bereich des hinteren Abschnitts 37 zweite Haltemittel gebildet, durch die eine aufliegende Prägefolienbahn großflächig festgehalten wird. Ein zwischen den Abschnitten 36, 37 liegender, die Ausnehmung 34 überspannender Zwischenabschnitt bzw. Trennabschnitt schwebt dagegen frei über den Boden der Ausnehmung 34 und kann, wenn sich im Bereich der Ausnehmung mindestens eine Saugöffnung befindet, unter Aufbau von Bahnspannung geringfügig in den Bereich der Ausnehmung 34 eingesogen werden, vorzugsweise ohne den Boden zu berühren.On the circumference of the roller sleeve 33, two diametrically opposed to the roller rotation axis, parallel to the axis of rotation or perpendicular to the direction of rotation 29 aligned, groove-shaped recesses 34, 35 are provided. It can also be provided only one recess or more than two, preferably arranged in the circumferential direction at regular intervals recesses. The recesses shown schematically have a width of about 0.5 cm in the circumferential direction, go over the entire width of the roller sleeve and separate each one in the circumferential direction of the front portion 36 of the cylindrical peripheral surface of the roller from a distance behind the rear section 37. The sections 36, 37 form in the feed direction of the embossing foil web movable, cylindrically curved pressure surfaces on which each of the lying thereon web sections with running suction fan under construction of stiction are pressed by passing between the suction roll surface and web material in the area the recess 44, a negative pressure is generated. As a result, first holding means are formed in the region of the front section 36 and second holding means are formed in the region of the rear section 37, by means of which a resting stamping foil web is held over a large area. A lying between the sections 36, 37, the recess 34 spanning intermediate section or separation section hovers freely over the bottom of the recess 34 and, if there is at least one suction opening in the region of the recess, under construction of web tension slightly in the region of the recess 34 are sucked in, preferably without touching the ground.

Die mit der Saugwalze 27 zusammenwirkende Trenneinrichtung 28 hat ein vom Motor 26 angetriebenes, mit der Walzenhülse 33 synchronisiert drehendes, walzenförmiges Rotationselement 39, an dessen Umfang ein quer zur Umfangsrichtung ausgerichtetes Trennorgan 40 in Form eines Schneidmessers mit gezackter, nach radial außen stehender Schneide angeordnet ist. Die Saugwalze 27 und der rotierende Messerträger 39 der Trennvorrichtung sind derart zueinander angeordnet und synchronisiert angetrieben, daß das Trennorgan 40 bei jeder Umdrehung der Walze 39 abwechselnd in eine der Ausnehmungen 34, 35 etwa mittig zwischen den Ausnehmungsrändern eingreift, ohne jedoch den Boden der Ausnehmung zu berühren.The cooperating with the suction roller 27 separator 28 has a driven by the motor 26, synchronized with the roller sleeve 33 rotating cylindrical member 39, on the circumference of a transversely aligned to the circumferential direction separating member 40 is arranged in the form of a cutting blade with jagged, radially outwardly standing cutting edge , The suction roller 27 and the rotating blade carrier 39 of the separator are arranged to each other and synchronized driven that the separating member 40 alternately engages in each revolution of the roller 39 in one of the recesses 34, 35 approximately centrally between the Ausnehmungsrändern, but without the bottom of the recess touch.

Zur Erzeugung von Längsschnitten hat in nicht gezeigter Weise das bei der beschriebenen Ausführungsform durch die Saugwalze 27 gebildete Förderelement von der Zeichnung entlang seines Umfanges eine, vorzugsweise jedoch mehrere, parallel zueinander verlaufende Umfangsausnehmungen, in deren Bereich feststehende oder ebenfalls umlaufende Trennorgane, wie Schneidmesser, eingreifen, um die Materialbahn in schmale Längsstreifen zu zertrennen.For the production of longitudinal sections has not shown manner in the embodiment described by the suction roller 27 conveying element of the drawing along its circumference one, but preferably a plurality of mutually parallel circumferential recesses, in the area fixed or equally circulating separating members, such as cutting blades intervene to cut the web into narrow longitudinal strips.

Die Absaugeinrichtung 30 hat eine an ein nicht gezeigtes Sauggebläse angeschlossene Saugdüse 45, deren der Saugwalze 27 zugewandte Saugöffnung 46 in geringem radialen Abstand zur Umfangsfläche der Walzenhülse 33 in einem Umfangsbereich der Walze angeordnet ist, in dem die Saugöffnungen 32 von der Ausnehmung 44 kommend in den Bereich des die Öffnungen abdeckenden Walzenskerns 31 einlaufen. In diesem Bereich wird durch die Abdichtung der Saugöffnungen die durch Unterdruck bewirkte Haltekraft aufgehoben, so daß ein leichtes Abheben des noch auf der Umfangsfläche liegenden und ggf. noch anhaftenden Bahnmaterials gewährleistet ist. Es ist alternativ oder zusätzlich auch möglich, die Öffnungen 32 im der Saugöffnung 46 gegenüberliegenden Bereich von innen mit Druckluft zu beaufschlagen, so daß ein aktives Abblasen der Bahnmaterialstücke die Absaugung unterstützt. Das abgeförderte, zerkleinerte Bahnmaterial kann anschließend an die Absaugung mittels einer geeigneten Luftströmung in einen Sammelbehälter gefördert werden. Vorzugsweise schließt sich an die Sammlung des Abfalls eine entweder kontinuierlich erfolgende oder chargenweise Komprimierung zur weiteren Verringerung des Packvolumens an, beispielsweise mittels einer Ballenpresse.The suction device 30 has a suction nozzle 45, which is connected to a suction fan, not shown, and the suction roller 27 facing suction opening 46 is arranged at a small radial distance from the circumferential surface of the roller sleeve 33 in a circumferential region of the roller, in which the suction openings 32 coming from the recess 44 in the Run in the area of the openings covering the roller core 31. In this area, the vacuum force caused by the holding force is released by the sealing of the suction openings, so that a slight lifting of the still lying on the peripheral surface and possibly still adhering web material is guaranteed. It is alternatively or additionally possible to pressurize the openings 32 in the suction opening 46 opposite area from the inside with compressed air, so that an active blowing off the pieces of web material supports the suction. The conveyed, shredded web material can then be conveyed to the suction by means of a suitable flow of air into a collecting container. Preferably, collection of the waste is followed by either continuous or batch compression to further reduce the packing volume, for example by means of a baler.

Die Einrichtung kann nach folgendem Verfahren arbeiten. Vor Anlaufen der Prägevorrichtung wird ein freier Endabschnitt der Prägefolienbahn durch den Prägespalt und um die Umlenkrolle 19 usw. bis auf den mit wirksamen Saugöffnungen versehenen Teil der Saugwalze 27 geführt, wo der freie Endabschnitt durch Unterdruck sicher festgehalten wird. Bei laufender Vorrichtung und in Richtung 29 drehender Walzenhülse wird ständig zugeführtes Bahnmaterial nachgezogen und gelangt jeweils auf dem der Trennvorrichtung 28 vorgeschalteten Umfangsabschnitt 37 in flächige Haftung zur Umfangsfläche der Hülse. Bei der gezeigten Ausführungsform entspricht die Geschwindigkeit der Hülsenoberfläche in Umfangsrichtung der Zufuhrbahngeschwindigkeit der Folienbahn 2, so daß diese unter Aufbau von Haftreibung ohne Verrutschen mitgenommen bzw. von der Saugwalze 27 aus dem vorgeschalteten Folienspeicher gezogen wird. Sobald eine Ausnehmung in den Anlagebereich 47 einläuft, in dem die Prägefolienbahn tangential kommend in Berührungskontakt mit der Walze tritt, wird die Ausnehmung durch die unter Zugspannung stehende Prägefolienbahn überbrückt. Der überbrückte Bereich läuft weiter Richtung Trennvorrichtung 28 während die Folienbahn auf den der Ausnehmung nachfolgenden Halteabschnitt aufgezogen wird.The device can work according to the following procedure. Before starting the embossing device, a free end portion of the embossing foil web is guided through the embossing gap and around the guide roller 19, etc., to the portion of the suction roller 27 provided with effective suction openings, where the free end portion is securely held by negative pressure. When the device is running and in the direction of the rotating roller sleeve 29, continuously fed web material is drawn in and arrives in each case on the separator section 28 upstream peripheral portion 37 in areal adhesion to the peripheral surface of the sleeve. In the embodiment shown, the speed of the sleeve surface corresponds in the circumferential direction of the feed path speed of the film web 2, so that they take along under construction of static friction without slipping or pulled by the suction roller 27 from the upstream film storage. As soon as a recess enters into the abutment region 47, in which the embossing foil web comes into tangential contact with the roller, the recess is bridged by the embossing foil web under tension. The bridged region continues to run towards the separating device 28 while the film web is being pulled onto the holding section following the recess.

Die gezackte Schneide des umlaufenden Trennorgans 40 läuft auf einer Kreisbahn, die sich im Bereich der Verbindungslinie zwischen den Drehachsen von Saugwalze 27 und Rotationselement 39 mit der zylindrischen Umfangsfläche der Saugwalze überschneidet. Bei Einlaufen einer überspannten Ausnehmung in den Bereich der Trennvorrichtung setzt das Trennorgan zunächst auf der Außenseite der gespannten Folie auf und wird bei weiterer Rotation bis in die in Fig. 1 gezeigte Position, bei der die Schneide direkt zur Drehachse der Saugwalze zeigt, kontinuierlich weiter in das Innere der Ausnehmung eingedrückt. Jenseits der gezeigten Stellung maximaler Eindringtiefe zieht sich das Trennorgan durch die gegenläufige Drehung der Rotationselemente 27, 39 wieder aus dem Bereich der Ausnehmung zurück.The serrated edge of the circulating separating member 40 runs on a circular path which intersects in the region of the connecting line between the axes of rotation of suction roller 27 and rotary member 39 with the cylindrical peripheral surface of the suction roll. When entering an overstretched recess in the region of the separator, the separating member initially sets on the outside of the tensioned film and is continuously further in rotation to the position shown in Fig. 1, in which the blade points directly to the axis of rotation of the suction roll the interior of the recess pressed. Beyond the position shown maximum penetration depth, the separating member pulls back by the opposite rotation of the rotary members 27, 39 back out of the region of the recess.

Bei Aufsetzen des gezackten Trennmessers 40 auf die Folie werden im Bereich der entlang einer geraden Linie senkrecht zur Umlaufrichtung 29 angeordneten, quasi punktförmigen Zackenspitzen sofort große Aufpreßdrücke erreicht, die eine punktuelle Perforation der Folie in Querrichtung herbeiführen, ohne diese stark in die Ausnehmung hineinzudrücken. Die großflächige Haftung der Folienbahn beidseits der Ausnehmung verhindert dabei zuverlässig, daß während des Trennvorgangs Bahnmaterial in den Bereich der Ausnehmung eingezogen wird. Im weiteren Verlauf des Trennvorganges drücken sich die Sägezähne unter Erweiterung der Perforationen weiter in die Ausnehmung ein, bis schließlich Perforationen zusammenwachsen und sich der in Umlaufrichtung vor der Ausnehmung befindende, flächig auf dem Vorderabschnitt 36 haftende Teil der Materialbahn von dem auf der hinteren Andrückfläche 37 haftenden Abschnitt ablöst. Das danach nicht mehr mit dem nachgeführten Rest der Prägefolienbahn verbundene Bahnmaterialstück gelangt bei weiterer Drehung mit seinem vorderen Bereich in den Bereich der Saugöffnung 46. Gleichzeitig werden die vom Vorderabschnitt abgedeckten Saugöffnungen durch den Walzenkern 31 innen abgedeckt, so daß die Saugwirkung entfällt und sich das Materialstück leicht absaugen läßt.When placing the serrated separating knife 40 on the film immediately large Aufpreßdrücke be achieved in the area along a straight line perpendicular to the direction of rotation 29 arranged quasi point-shaped peaks that cause a punctual perforation of the film in the transverse direction, without forcing them strongly into the recess. The large-area adhesion of the film web on both sides of the recess reliably prevents web material from being drawn into the region of the recess during the separation process. In the further course of the separation process, the saw teeth press on expanding the perforations further into the recess, until finally Perforations grow together and in the direction of circulation in front of the recess located, detaching surface on the front portion 36 adhering part of the material web from the adhering to the rear pressing surface 37 section. At the same time, the suction openings covered by the front section are covered by the roller core 31 on the inside, so that the suction effect is eliminated and the material piece is not covered by the rest of the stamping foil web can be vacuumed easily.

Da zur Erzeugung von Längsschnitten das bei der beschriebenen Ausführungsform durch die Saugwalze 27 gebildete Förderelement entlang seines Umfanges eine, vorzugsweise jedoch mehrere, parallel zueinander verlaufende Umfangsausnehmungen hat, in deren Bereich feststehende oder ebenfalls umlaufende Trennorgane, wie Schneidmesser, eingreifen, wird die Materialbahn in schmale Längsstreifen zertrennt. Es wurde festgestellt, dass dadurch der Vorteil entsteht, dass diese Zerteilung in Längsstreifen bei einer darauffolgenden Absaugung nicht nur den Widerstand und damit die Zugwirkung erhöht und vergleichsmäßig, sondern auch schädliche Rückwirkungen auf den Prägevorgang, wie Querbewegungen und Flattererscheinungen verringert oder vermeidet. Der Längsschnitt kann auch mit Trennungen in Querrichtung kombiniert werden, um kurze Bahnschnipsel zu erzeugen, die mit besonders großer Packungsdichte aufsammelbar und ggf. kompaktierbar sind.Since for the production of longitudinal cuts formed in the described embodiment by the suction roller 27 along its circumference has one, but preferably a plurality of mutually parallel circumferential recesses, in the region of fixed or also circulating separating members, such as cutting blade, engage, the material web is in narrow Longitudinal stripes are severed. It has been found that this results in the advantage that this division in longitudinal strips in a subsequent extraction not only increases the resistance and thus the traction and comparatively, but also reduces or avoids harmful repercussions on the embossing process, such as transverse movements and flutter phenomena. The longitudinal section can also be combined with separations in the transverse direction to produce short Bahnschnipsel, which can be collected with particularly high packing density and possibly compacted.

Während bei der beschriebenen Ausführungsform die Umfangsgeschwindigkeit der Saugwalze 27 gleich der Zufuhrbahngeschwindigkeit ist, ist bei einer anderen, nicht gezeigten Ausführungsform vorgesehen, die Umfangsgeschwindigkeit eines umlaufenden Förderelementes zumindest zeitweise, vorzugsweise jedoch durchgehend größer als die Zufuhrbahngeschwindigkeit zu wählen, wodurch sich zwischen Materialbahn und den entsprechenden Andruckflächen keine Haftreibung, sondern Gleitreibung aufbaut bzw. ein Schlupf entsteht. Dies bewirkt, daß das Förderelement der Entsorgungseinrichtung sanft und ruckfrei, aber stetig am zugeführten Bahnmaterial zieht. Das Bahnmaterial wird kurzzeitig entgegen der Umlaufrichtung des Förderelementes Richtung Prägespalt zurückgezogen wird. Die Länge der Andruckfläche in Umfangsrichtung kann dabei zweckmäßig so gewählt sein, daß ein vollständiges Abrutschen bzw. Abziehen der Materialbahn vom Förderelement zuverlässig verhindert wird. Eine derartige Fördereinrichtung der Entsorgungseinrichtung kann mit einer Querschnitt- und/oder Längsschnitt-Trennvorrichtung zusammenwirken. Es können besonders vorteilhaft Längsschneider eingesetzt werden, deren feststehende oder sich bewegende, insbesondere drehende Trennorgane eine Zertrennung des Bahnmaterials weitgehend unabhängig von der jeweils vorherrschenden Bahngeschwindigkeit des ihnen zugeführten Bahnmaterials bewirken können. Bei Querschneidern kann es in Abwandlung der beschriebenen Ausführungsform beispielsweise so sein, daß ein umlaufendes Trennorgan mit einer von der Umfangsgeschwindigkeit des Saugförderers abweichenden Umlaufgeschwindigkeit umläuft, die ggf. in Abhängigkeit von der tatsächlichen Zufuhrbahngeschwindigkeit gesteuert sein kann, um ein Reißen oder Zupfen am zu trennenden Bahnmaterial zu verhindern oder zu minimieren.While in the described embodiment, the peripheral speed of the suction roller 27 is equal to the feed path speed, is provided in another, not shown embodiment, the peripheral speed of a rotating conveyor element at least temporarily, but preferably continuously larger than that To choose feed path speed, which builds up between the web and the corresponding pressure surfaces no static friction, but sliding friction or slip occurs. This causes the conveyor element of the disposal facility gently and smoothly, but steadily pulls the supplied web material. The web material is briefly withdrawn against the direction of rotation of the conveying element in the direction of the embossing gap. The length of the pressure surface in the circumferential direction can be suitably chosen so that complete slipping or pulling the web from the conveyor element is reliably prevented. Such a conveying device of the disposal device can cooperate with a cross-sectional and / or longitudinal cutting separator. It can be used particularly advantageous slitter whose fixed or moving, in particular rotating separating members can cause a separation of the web material largely independent of the prevailing web speed of the web material supplied to them. In cross-cutters, in a modification of the described embodiment, for example, be such that a rotating separating member rotates at a deviating from the peripheral speed of the suction conveyor rotational speed, which may be controlled depending on the actual feed path speed, if necessary, to tearing or plucking at the web material to be separated to prevent or minimize.

Ein mit Überschußgeschwindigkeit gegenüber der bewegten Folienbahn drehender Förderer, insbesondere Saugförderer, der Entsorgungseinrichtung kann eine Zugeinrichtung mit Schlupfantrieb für die Materialbahn 2 bilden, die mit der dem Prägespalt vorgeschalteten Steuerwalze 17 zur kontinuierlichen oder diskontinuierlichen Bewegung der Prägefolienbahn durch den Prägespalt zusammenwirkt. Dadurch kann ggf. eine gesonderte Zugeinrichtung, wie sie beispielsweise durch den Saugförderer mit Schlupfantrieb der EP 0 718 099 gebildet ist, entfallen. Auch auf einen zwischen Prägespalt und Entsorgungseinrichtung ggf. anordenbaren Folienspeicher kann ggf. verzichtet werden. Bei derartigen Ausführungsformen kann ein Saugförderer eine Doppelfunktion haben, indem er einerseits im Rahmen der Folienbeschleunigungsmittel für die richtige Bewegungsgeschwindigkeit und ggf. -richtung der Prägefolienbahn im Prägespalt sorgt und andererseits als Haltemittel für die verbrauchte Prägefolienbahn bei der kontinuierlichen Entsorgung wirkt.A with an excess speed relative to the moving film web rotating conveyor, in particular suction conveyor, the disposal facility can form a traction device with slip drive for the web 2, which cooperates with the pre-nip upstream control roller 17 for continuous or discontinuous movement of the embossing film through the embossing gap. As a result, if necessary, a separate pulling device, as for example by the suction conveyor formed with slip drive EP 0 718 099, omitted. It is also possible, if necessary, to dispense with a film store that may be arranged between embossing gap and disposal facility. In such embodiments, a suction conveyor may have a dual function, on the one hand as part of the film acceleration means for the correct movement speed and optionally direction of the embossing film web in the embossing gap and on the other hand acts as a holding means for the spent embossing film web in the continuous disposal.

Erfindungsgemäße Entsorgungseinrichtungen arbeiten auch bei hohen Durchsatzgeschwindigkeiten des Bahnmaterials zuverlässig und sind sowohl zum Zertrennen dickeren, steiferen Bahnmaterials, wie Papier oder dergleichen, insbesondere aber zum zuverlässigen Zerstückeln von dünnem Folienmaterial, hervorragend geeignet. Die geschaffene Möglichkeit einer störungsfreien, kontinuierlichen Entsorgung verbrauchten Bahnmaterials erlaubt es, entsprechende Einrichtungen zur Verarbeitung des Bahnmaterials ohne entsorgungsbedingte Stillstandszeiten zur Erreichung höherer Leistung zu betreiben.Disposal facilities according to the invention work reliably even at high throughput speeds of the web material and are outstandingly suitable both for severing thicker, stiffer web material, such as paper or the like, but in particular for reliable fragmentation of thin film material. The created possibility of a trouble-free, continuous disposal of used web material makes it possible to operate corresponding facilities for processing the web material without disposal-related downtimes to achieve higher performance.

Claims (13)

  1. Method for the disposal of flexible material in the form of at least one moving material web (2) fed in a feed direction (11) to a disposal device (25), particularly for disposing of used embossing film web during the operation of a hot embossing mechanism, characterized in that the material web is separated in an intermediate portion located between a first web portion and at least one second web portion, that the first web portion, considered in the feed direction (11), at least zonally is alongside the second web portion and separation takes place at an acute angle or parallel to the feed direction (11) and that the material web is briefly retracted counter to the feed direction (11).
  2. Method according to claim 1, characterized in that the material web (2) is cut into narrow strips by a longitudinal cut or several parallel longitudinal cuts.
  3. Method according to claim 1, characterized in that the web material is held in freely suspended and/or taut manner in the intermediate portion.
  4. Method according to claim 1 or 2, characterized in that an additional separation takes place transversely and in particular at right angles to the feed direction and optionally separation takes place simultaneously at several points.
  5. Method according to one of the preceding claims, characterized in that the web material for separation purposes is cut with a free cutting edge and/or that the web material for separation purposes is perforated in the intermediate area at a number of points and preferably simultaneously and that the perforation is subsequently enlarged until growing together occurs.
  6. Method according to one of the claims 1 to 4, characterized in that the web material is melted in the intermediate area for separation purposes, in particular along a substantially straight melt line.
  7. Apparatus for the disposal of flexible material in the form of at least one moving material web (2) fed in a feed direction with a feed web speed by a web material-processing device to the apparatus for performing the method according to one of the preceding claims, characterized in that it has a separating device (28) performing a longitudinal cut, that the separating device (28) for separating the web material (2) is constructed between at least two web portions to be disposed of and the web material-processing device is provided for the brief retraction of the web portions counter to the feed direction (11).
  8. Apparatus according to claim 7, characterized in that it has first holding means (27, 36) for the flat holding of a first material web portion and second holding means (27, 37) for the flat holding of a second material web portion and that the first holding means and/or the second holding means have at least one pressing face (36, 37) movable in the feed direction and onto which can be pressed a web portion, accompanied by the building up of static or sliding friction.
  9. Apparatus according to claim 8, characterized in that the holding means comprise at least one continuously revolving conveying means, particularly a conveying roll (33) or a conveyor belt and/or that the holding means comprise at least one suction conveyor (27) having at least one revolving conveying element (33) with an outer face (36, 37) serving as the pressing face and onto which can be sucked a longitudinal portion of the web material comprising the web portions.
  10. Apparatus according to one of the claims 8 or 9, characterized in that the pressing face has at least one recess (34, 35) bridgeable by the pressed web material.
  11. Apparatus according to one of the claims 7 to 10, characterized in that the separating device (28) has at least one movable separating member (40) separating the moving web material in the vicinity of a recess (34, 35) and/or that the separating device (28) has at least one rotary element (39) synchronized with a revolving conveying means (33) and carrying on its circumference at least one separating member (40) and which is so positioned relative to the conveying means that the separating member meshes with a recess (34, 35) and/or that the separating member is a blade (40), particularly having a serrated cutting edge.
  12. Apparatus according to one of the claims 7 to 11, characterized in that there is a collecting device for the web material portions and which has a suction device (30) and/or that with the apparatus is associated a device for preferably batchwise compression of the collected web material pieces, particularly at least one baling press.
  13. Embossing apparatus of a web material-processing device with an embossing mechanism (3) in which an embossing gap (6) is formed between an embossing cylinder (4) and a counterpressure element (5), and with a conveying device (1) for conveying an embossing film web (2) through the embossing gap, characterized in that the embossing gap is followed by at least one disposal device (25) according to one of the claims 7 to 12.
EP03008792A 1998-09-23 1999-09-02 Method and apparatus for the disposal of web material Expired - Lifetime EP1332997B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19843533A DE19843533A1 (en) 1998-09-23 1998-09-23 Method and device for disposal of web material
DE19843533 1998-09-23
EP99117243A EP0989086B1 (en) 1998-09-23 1999-09-02 Method and apparatus for the disposal of web material

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP99117243A Division EP0989086B1 (en) 1998-09-23 1999-09-02 Method and apparatus for the disposal of web material
EP99117243.8 Division 1999-09-02

Publications (2)

Publication Number Publication Date
EP1332997A1 EP1332997A1 (en) 2003-08-06
EP1332997B1 true EP1332997B1 (en) 2006-03-01

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EP99117243A Expired - Lifetime EP0989086B1 (en) 1998-09-23 1999-09-02 Method and apparatus for the disposal of web material
EP03008792A Expired - Lifetime EP1332997B1 (en) 1998-09-23 1999-09-02 Method and apparatus for the disposal of web material

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EP99117243A Expired - Lifetime EP0989086B1 (en) 1998-09-23 1999-09-02 Method and apparatus for the disposal of web material

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US (1) US6425323B1 (en)
EP (2) EP0989086B1 (en)
AT (2) ATE318784T1 (en)
DE (3) DE19843533A1 (en)
DK (2) DK1332997T3 (en)
ES (2) ES2259396T3 (en)

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Also Published As

Publication number Publication date
DE19843533A1 (en) 2000-03-30
ATE318784T1 (en) 2006-03-15
DK0989086T3 (en) 2004-02-02
DK1332997T3 (en) 2006-06-12
ES2259396T3 (en) 2006-10-01
DE59907611D1 (en) 2003-12-11
EP0989086A2 (en) 2000-03-29
EP0989086A3 (en) 2000-11-29
DE59913149D1 (en) 2006-04-27
EP1332997A1 (en) 2003-08-06
ES2209302T3 (en) 2004-06-16
ATE253522T1 (en) 2003-11-15
EP0989086B1 (en) 2003-11-05
US6425323B1 (en) 2002-07-30

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