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EP0383148B1 - Folding apparatus - Google Patents

Folding apparatus Download PDF

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Publication number
EP0383148B1
EP0383148B1 EP90102282A EP90102282A EP0383148B1 EP 0383148 B1 EP0383148 B1 EP 0383148B1 EP 90102282 A EP90102282 A EP 90102282A EP 90102282 A EP90102282 A EP 90102282A EP 0383148 B1 EP0383148 B1 EP 0383148B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
nozzles
folder
guide
web
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90102282A
Other languages
German (de)
French (fr)
Other versions
EP0383148A2 (en
EP0383148A3 (en
Inventor
Sebastian Prüm
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.)
Albert Frankenthal AG
Original Assignee
Albert Frankenthal AG
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 Albert Frankenthal AG filed Critical Albert Frankenthal AG
Publication of EP0383148A2 publication Critical patent/EP0383148A2/en
Publication of EP0383148A3 publication Critical patent/EP0383148A3/en
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Publication of EP0383148B1 publication Critical patent/EP0383148B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/16—Rotary folders
    • B65H45/162—Rotary folders with folding jaw cylinders
    • B65H45/167—Rotary folders with folding jaw cylinders having associated sheet guide means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/28—Folding in combination with cutting

Definitions

  • the invention relates to a folder according to the preamble of claim 1.
  • a folder of this type is known from DE-B-16 11 292 .
  • folders of this type there is the advantage that different formats can be produced without the cross cutter with a subsequent acceleration path usually provided in the case of variable folders being required.
  • the products to be manufactured must already be separated from the web at their rear end before the grippers can grip the front end of these web sections.
  • the result of this is that the front web end which arises with each cut before its entry into the tape guide, ie in the region of the gusset between the interface and the beginning of the tape guide, is without a guide. There is therefore a risk that this front strand will be wavy, which can lead to inaccurate folds in the course of later processing.
  • the effectiveness of the known blowing device is therefore limited to the area that can be perforated, which can lead to inconveniences when exchangeable measuring bars are used. Accordingly, the blown air supplied to the blower device of the known arrangement is not controlled, but rather is continuously supplied. Difficulties would accordingly arise when installing the blowing device which can be found in DE-A-21 42 902 in a generic arrangement, since the beginning of the web which was not held in the generic arrangement would be washed away by the blowing air permanently emitted by the blowing device.
  • Another advantage of the combination according to the invention is that an air cushion is formed between the web and the fixed guide device on the one hand and the gripper cylinder on the other hand, or in any case is not removed, which ensures that the surface of the web is protected.
  • the measures according to the invention accordingly result in high accuracy, high reliability and excellent protection of the products.
  • the nozzles can be activated as they pass through the cutting gap and the gusset connected to them and can be passivated outside of them. This allows the energy consumption to be kept within limits. At the same time it is ensured that the Air flow-caused disturbances of other work processes are switched off.
  • the cylinder containing the nozzles can be provided in the area of at least one bearing journal with at least one radially opening connection bore connected to the blowing nozzles and in the area of the connection bore can be surrounded by a block which can be secured against counter-rotation and which produces a pressure difference from one to another Unit connected supply channel is penetrated, the inner mouth of which is run over by the mouth of the connecting hole.
  • the block can expediently be pivotable and lockable with respect to the axis of the assigned cylinder, which enables simple adjustment of the activation phase.
  • the folding apparatus on which FIG. 1 is based comprises a knife cylinder 1, a collecting cylinder 2 positioned thereon and a folding jaw cylinder 3 interacting with it.
  • the knife cylinder 1 is provided with two knives 4 which are offset by 180 ° and which form a cross-section on the collecting cylinder 2 arranged counter knives 5, in the form of cutting grooves or counter holding rails or the like, cooperate.
  • the collecting cylinder 2 is a three-part cylinder. Accordingly, three counter knives 5 offset by 120 ° are provided.
  • the collecting cylinder 2 is further provided with the counter-knives 5, which are offset relative to them in the direction of rotation forward grippers 6 and with folding knives 7 arranged between the grippers 6 and the associated counter-knives 5. These interact with jaws 8 of the jaw cylinder 3, which like the knife cylinder 1 is designed as a two-part cylinder.
  • the cylinders 1, 2, 3 are driven with the same circumferential speed independent of the speed of the web 9 entering the cutting gap between the knife cylinder 1 and the collecting cylinder 2, so that different section lengths can be produced.
  • the grippers 6 and folding blades 7 of the collecting cylinder 2 and, with the folding blades, the folding jaws 8 of the folding jaw cylinder 3 can be adjusted depending on the format.
  • the grippers 6 are controlled in such a way that they only grip the front end of the product after the rear end is separated from the web 9 by a cross section and the web section 9a thus produced can assume the cylinder peripheral speed which deviates from the web speed.
  • the circumferential region of the collecting cylinder 2 leading from the knife cylinder 1 in the direction of rotation to the folding jaw cylinder 3 is encompassed by a belt guide 10 which is driven at the circumferential cylinder speed.
  • the belt guide 10 holds the web start or web sections 9 which arises with each cross section in contact with the collecting cylinder 2, so that the grippers 6 can grasp the front edge of the section.
  • the strips of the strip guide 10 are deflected by deflecting rollers 11 arranged in the outlet region of the cutting gap between the knife cylinder 1 and the collecting cylinder 2 and in the inlet region of the folding gap between the collecting cylinder 2 and the folding jaw cylinder 3.
  • the knife cylinder 1 with its knives 4 is trailing Provide blowing nozzles 12, which can be connected to a compressed air source when passing through the cutting gap and the gusset connected thereafter. Due to the dynamic pressure of the air jets emerging from the blowing nozzles 12, the web material is pressed against the collecting cylinder 2, as indicated by the arrow 13 in FIG. 1.
  • the blowing nozzles 12 are simply formed by radial or secant bores from which further bores can originate, so that there are blowing nozzles 12 arranged one after the other in the circumferential direction.
  • the nozzle outlet can equip the nozzle outlet with nipples, which can be adjustable and allow strong beam focusing.
  • the blowing nozzles 12 are distributed uniformly over the cylinder length.
  • the collecting cylinder 2 could be provided with suction nozzles which follow the counter knives 5 and can be connected to a vacuum source and through which the web material could be attracted to the collecting cylinder 2.
  • stationary guide device 14 is provided, which ensures mechanical guidance of the material flowing out of the cutting gap.
  • this guide device consists of a plurality of guide tongues 15 arranged at a distance from one another. These are spaced apart from one another in such a way that the blowing nozzles 12 can blow through between them, as indicated in FIG. 2 by arrow 13.
  • the blowing nozzles 12 are accordingly set to a gap in the longitudinal direction of the cylinder with respect to the guide tongues 15.
  • the guide tongues 15 are received on a traverse 16 which is continuous over the machine width. This is, as can be seen in FIG. 1, arranged so that it does not hinder the air jets penetrating the space 17 between adjacent guide tongues 15, ie the cylinder-side flanks of the guide tongues 15, which are approximately triangular in cross section, are at least partially left free.
  • the blowing nozzles 12 are connected to a compressed air source, in the form of a compressed air line 20 connected to the in-house compressed air network, via a rotating union 19 provided in the area of the axle journal 18 of the knife cylinder 1 and a cylinder-side bore system.
  • a compressed air source in the form of a compressed air line 20 connected to the in-house compressed air network
  • the blowing nozzles assigned to the offset knives 4 of the knife cylinder 1 can be assigned via their own rotary unions 19 arranged in the area of the same or different axle journals 18 and assigned to these Drilling systems can be supplied with compressed air.
  • the bore system associated with each of the blow nozzles 12 following a knife 4 leads from the radial bores forming the blow nozzles 12 to an axial bore 21 which is closed at the end and is continuous over the cylinder length and from which the radial bores forming the blow nozzles 12 depart and which is connected via a radial bore 22, which is likewise closed on the circumferential side, to a central axial blind bore 23, which is closed on the end face and from which a radial connecting bore 24 extends. This is located in the region of an extension of the journal 18 that extends beyond the frame wall 25.
  • the rotary union 19 contains a block 26 which is provided with a bore parallel to the cylinder and which is plugged onto the extension of the journal 18 containing the connection bore 24.
  • the block 26, which can be pivoted with respect to the cylinder axis, can be connected to the adjacent frame wall 25 by means of a retaining screw 27 and can thus be secured against rotation. In the axial direction, the block 26 is secured by clamping rings and spacer sleeves.
  • the block 26 is provided with a radial bore forming a retraction channel 28, at the circumferential end of which the compressed air line 20 connects and which extends through to the bore of the block 26 parallel to the cylinder.
  • the inner mouth of the supply channel 28 is run over at each revolution of the knife cylinder 1 by the end of the connecting bore 24 located in the region of the circumference of the axle journal 18, with the blowing nozzles 12 being pressurized with compressed air.
  • a nipple can be provided for connecting the compressed air line 20 at the outer end of the supply channel 28.
  • the holding screw 27 is simply loosened and the block 26 is rotated accordingly. Accordingly, as can best be seen from FIG. 4, the latter is provided with an elongated hole 29, penetrated by the retaining screw 27 and concentric with the cylinder axis.
  • a bushing 30 is inserted into the block 26 and has a circumferential recess 31 into which the supply channel 28 runs.
  • the recess 31 practically forms a control chamber for extending the compressed air supply to the blowing nozzles 10 beyond the angular range corresponding to the diameter of the radial bore forming the supply channel 28.
  • the cutout 31 accordingly extends over a circumferential angle which corresponds approximately to the angular distance between the interface and the adjacent deflecting roller 11.

Landscapes

  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Description

Die Erfindung betrifft einen Falzapparat gemäß Oberbegriff des Anspruchs 1.The invention relates to a folder according to the preamble of claim 1.

Ein Falzapparat dieser Art ist aus der DE-B-16 11 292 bekannt. Bei Falzapparaten dieser Art ergibt sich der Vorteil, daß unterschiedliche Formate hergestellt werden können, ohne daß der bei variablen Falzapparaten üblicherweise vorgesehene Querschneider mit nachgeordneter Beschleunigungsstrecke benötigt wird. Infolge der Geschwindigkeitsdifferenz zwischen der Bahn und den die Schneidwerkzeuge enthaltenden Zylinder müssen hierbei die herzustellenden Produkte an ihrem hinteren Ende von der Bahn bereits getrennt sein, bevor die Greifer das vordere Ende dieser Bahnabschnitte erfassen können. Dies hat zur Folge, daß das bei jedem Schnitt entstehende, vordere Bahnende vor seinem Einlauf in die Bandführung d.h. im Bereich des Zwickels zwischen der Schnittstelle und dem Beginn der Bandführung, ohne Führung ist. Es besteht daher die Gefahr, daß dieses vordere Trum wellig wird, was zu Falzungenauigkeiten im Verlauf der späteren Verarbeitung führen kann.A folder of this type is known from DE-B-16 11 292 . In the case of folders of this type, there is the advantage that different formats can be produced without the cross cutter with a subsequent acceleration path usually provided in the case of variable folders being required. As a result of the speed difference between the web and the cylinders containing the cutting tools, the products to be manufactured must already be separated from the web at their rear end before the grippers can grip the front end of these web sections. The result of this is that the front web end which arises with each cut before its entry into the tape guide, ie in the region of the gusset between the interface and the beginning of the tape guide, is without a guide. There is therefore a risk that this front strand will be wavy, which can lead to inaccurate folds in the course of later processing.

Aus der DE-A-21 42 902 ergibt ich ein festformatiger Falzapparat mit einem mit Punkturen versehenen Falzmesser- und Punkturen Zylinder. Bereits aus diesem Grund eignet sich diese Anordnung nicht zur Verbesserung des gattungsgemäßen Standes der Technik. Bei der aus der DE-A-21 42 902 entnehmbaren Anordnung ist zwar im Bereich des Messerzylinders eine sogenannte Blaseinrichtung vorgesehen, die einen das Bahnmaterial an die Zylinderoberfläche des Falzmesser- und Punkturenzylinders andrückenden Luftstrom erzeugen soll. Nachdem hierbei jedoch der Bahnanfang durch die Punkturen gehalten wird, kommt den genannten Blasdüsen keine Führungsfunktion zu. Abgesehen davon handelt es sich hierbei nicht um den Messern des Messerzylinders nachlaufende Blasdüsen. Vielmehr ist die Blaseinrichtung bei der bekannten Anordnung innerhalb des perforierten Messerzylinders stationär angeordnet. Die Wirksamkeit der bekannten Blaseinrichtung ist daher auf den Bereich beschränkt, der perforiert sein kann, was bei Verwendung austauschbarer Messbalken zu Unzuträglichkeiten führen kann. Die der Blaseinrichtung der bekannten Anordnung zugeführte Blasluft wird dementsprechend auch nicht gesteuert, sondern permanent zugeführt. Bei einem Einbau der aus der DE-A-21 42 902 entnehmbaren Blaseinrichtung in eine gattungsgemaße Anordnung würden dementsprechend Schwierigkeiten auftreten, da der bei der gattungsgemäßen Anordnung nicht gehaltene Bahnanfang von der von der Blaseinrichtung permanent abgegebenen Blasluft unterspült würde.From DE-A-21 42 902 I have a fixed format folder with a punctured folding knife and puncture cylinder. For this reason alone, this arrangement is not suitable for improving the generic state of the art. In the arrangement which can be gathered from DE-A-21 42 902, a so-called blowing device is provided in the area of the knife cylinder, which is intended to produce an air flow pressing the web material against the cylinder surface of the folding knife and puncturing cylinder. However, after the beginning of the path is held by the punctures, the above-mentioned blowing nozzles have no guiding function. Apart from that, these are not blowing nozzles that follow the knives of the knife cylinder. Rather, the blowing device is arranged stationary in the known arrangement within the perforated knife cylinder. The effectiveness of the known blowing device is therefore limited to the area that can be perforated, which can lead to inconveniences when exchangeable measuring bars are used. Accordingly, the blown air supplied to the blower device of the known arrangement is not controlled, but rather is continuously supplied. Difficulties would accordingly arise when installing the blowing device which can be found in DE-A-21 42 902 in a generic arrangement, since the beginning of the web which was not held in the generic arrangement would be washed away by the blowing air permanently emitted by the blowing device.

Hiervon ausgehend ist es daher die Aufgabe der vorliegenden Erfindung, einen Falzapparat gattungsgemäßer Art hinsichtlich der Führung der Bahnabschnitte mit einfachen und kostengünstigen Mitteln zu verbessern.Proceeding from this, it is therefore the object of the present invention to improve a folder of the generic type with regard to the guidance of the web sections with simple and inexpensive means.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Maßnahmen des Anspruchs 1 gelöst.This object is achieved by the characterizing measures of claim 1.

Mit diesen Maßnahmen werden die Mängel des gattungsgemäßen Standes der Technik vollständig beseitig. Durch die von den Blasdüsen des Messerzylinders erzeugten Druckluftstrahlen wird das bei jedem Schnitt entstehende Bahnende auf dem gesamten Weg zwischen Schneidspalt und Beginn der Bandführung an den Greiferzylinder angedrückt und erfährt dabei die erforderliche Führung, so daß es in gestrecktem, ungewelltem Zustand in die Bandführung einläuft, was eine hohe Positionsgenauigkeit der vorderen Kante der Bahn bezüglich der Greifer des Greiferzylinders gewährleistet. Dennoch ist bei der erfindungsgemäßen Anordnung oberhalb der Bandführung eine mechanische Führung des Bahnanfangs durch die Leitzungen möglich. Da derartige Leitzungen wesentlich tiefer in den Zwickel zwischen Messerzylinder und Greiferzylinder eingreifen können, als die Bandführung, ergibt sich hierbei ein besonders zuverlässiger Betrieb. Dadurch, daß die einander benachbarten Leitzungen mit gegenseitigem Abstand angeordnet sind und die Blasdüsen des Messerzylinders hierzu auf Lücke gesetzt sind, so daß sie zwischen benachbarten Leitzungen hindurchblasen können, wird die Wirkung der Blasdüsen durch die genannten Leitzungen nicht behindert. Die von den Blasdüsen des Messerzylinders abgegebenen Druckluftstrahlen sind dementsprechend in vorteilhafter Weise nicht nur oberhalb der Leitzungen wirksam, sondern auch im Bereich der Leitzungen. Der Bahnanfang wird dementsprechend, wie schon erwähnt, bis zu seinem Einlauf in die Bandführung zuverlässig an den Greiferzylinder angedrückt, was eine hohe Genauigkeit gewährleistet.With these measures, the shortcomings of the generic state of the art are completely eliminated. Due to the compressed air jets generated by the blow nozzles of the knife cylinder, the end of the web that occurs with each cut is pressed against the gripper cylinder all the way between the cutting gap and the beginning of the band guide, and thereby experiences the necessary guidance so that it runs into the band guide in a stretched, undulating state. which ensures a high positional accuracy of the front edge of the web with respect to the grippers of the gripper cylinder. Nevertheless, in the arrangement according to the invention above the tape guide, mechanical guidance of the beginning of the path through the guide tongues is possible. Since such guide tongues can engage much more deeply in the gusset between knife cylinder and gripper cylinder than the band guide, this results in particularly reliable operation. Characterized in that the adjacent guide tongues are arranged at a mutual distance and the blowing nozzles of the knife cylinder are set for this purpose so that they can blow through between adjacent guide tongues, the action of the blowing nozzles is not hindered by the mentioned guide tongues. The compressed air jets emitted by the blowing nozzles of the knife cylinder are accordingly effective not only above the guide tongues, but also in the area of the guide tongues. Accordingly, as already mentioned, the beginning of the web is reliably pressed onto the gripper cylinder until it enters the belt guide, which ensures high accuracy.

Ein weiterer Vorteil der erfindungsgemäßen Kombination ist darin zu sehen, daß hierbei zwischen der Bahn und der feststehenden Leiteinrichtung einerseits bzw. dem Greiferzylinder andererseits ein Luftpolster gebildet bzw. jedenfalls nicht abgebaut wird, was eine Schonung der Oberfläche der Bahn gewährleistet. Dies gilt insbesondere für die der festen Leiteinrichtung zugewandten Oberfläche der Bahn, die durch die vom Messerzylinder abgegebenen Druckluftstrahlen beaufschlagt wird. auf der gegenüberliegenden, dem Greiferzylinder zugewandten Seite wird in vorteilhafter Weise jedenfalls keine Luft abgesaugt, was auch hier ein gewisses Luftpolster ermöglicht. Die erfindungsgemäßen Maßnahmen ergeben dementsprechend eine hohe Genauigkeit, hohe Zuverlässigkeit und ausgezeichnete Schonung der Produkte.Another advantage of the combination according to the invention is that an air cushion is formed between the web and the fixed guide device on the one hand and the gripper cylinder on the other hand, or in any case is not removed, which ensures that the surface of the web is protected. This applies in particular to the surface of the web which faces the fixed guide device and which is acted upon by the compressed air jets emitted by the knife cylinder. on the opposite side, facing the gripper cylinder, no air is advantageously extracted in any case, which also allows a certain air cushion here. The measures according to the invention accordingly result in high accuracy, high reliability and excellent protection of the products.

Vorteilhafte Ausgestaltungen und zweckmäßige Fortbildungen der übergeordneten Maßnahmen sind in den Unteransprüchen angegeben. So können die Düsen beim Durchlaufen des Schneidspalts und des an diesen sich anschließenden Zwickels aktivierbar und außerhalb hiervon passivierbar sein. Hiermit läßt sich der Energieverbrauch in Grenzen halten. Gleichzeitig ist sichergestellt, daß durch die Luftströmung verursachte Störungen anderer Arbeitsvorgänge ausgeschaltet sind.Advantageous refinements and appropriate further training of the higher-level measures are specified in the subclaims. Thus, the nozzles can be activated as they pass through the cutting gap and the gusset connected to them and can be passivated outside of them. This allows the energy consumption to be kept within limits. At the same time it is ensured that the Air flow-caused disturbances of other work processes are switched off.

In weiterer Fortbildung der übergeordneten Maßnahmen kann der die Düsen enthaltende Zylinder im Bereich wenigstens eines Lagerzapfens mit wenigstens einer mit den Blasdüsen verbundenen, radial ausmündenden Anschlußbohrung versehen und im Bereich der Anschlußbohrung von einem Gegenverdrehen sicherbaren Block umfaßt sein, der von einem an ein eine Druckdifferenz erzeugenden Aggregat angeschlossenen Versorgungskanal durchsetzt ist, dessen innere Mündung von der Mündung der Anschlußbohrung überfahren wird. Diese Maßnahmen ergeben eine einfache Selbststeuerung der Düsenaktivierung durch die Zylinderdrehung.In a further development of the superordinate measures, the cylinder containing the nozzles can be provided in the area of at least one bearing journal with at least one radially opening connection bore connected to the blowing nozzles and in the area of the connection bore can be surrounded by a block which can be secured against counter-rotation and which produces a pressure difference from one to another Unit connected supply channel is penetrated, the inner mouth of which is run over by the mouth of the connecting hole. These measures result in a simple self-control of the nozzle activation by the cylinder rotation.

Zweckmäßig kann dabei der Block bezüglich der Achse des zugeordneten Zylinders schwenkbar und feststellbar sein, was eine einfache Einstellung der Aktivierungsphase ermöglicht.The block can expediently be pivotable and lockable with respect to the axis of the assigned cylinder, which enables simple adjustment of the activation phase.

Weitere vorteilhafte Ausgestaltungen und zweckmäßige Fortbildungen der übergeordneten Maßnahmen sind in den restlichen Unteransprüchen angegeben.Further advantageous refinements and expedient further training of the superordinate measures are specified in the remaining subclaims.

Nachstehend wird ein Ausführungsbeispiel anhand der Zeichnung näher erläutert.An exemplary embodiment is explained in more detail below with reference to the drawing.

Hierbei zeigen:

Figur 1
eine schematische Seitenansicht eines erfindungsgemäßen Falzapparats,
Figur 2
eine Draufsicht auf die stationäre Leiteinrichtung,
Figur 3
eine Draufsicht auf den mit Blasdüsen versehenen Messerzylinder und
Figur 4
eine Stirnansicht des Messerzylinders.
Here show:
Figure 1
2 shows a schematic side view of a folder according to the invention,
Figure 2
a plan view of the stationary guidance device,
Figure 3
a plan view of the knife cylinder provided with blowing nozzles and
Figure 4
an end view of the knife cylinder.

Der der Figur 1 zugrundeliegende Falzapparat umfaßt einen Messerzylinder 1 , einen an diesen angestellten Sammelzylinder 2 und einen mit diesem zusammenwirkenden Falzklappenzylinder 3. Der Messerzylinder 1 ist mit zwei um 180° gegeneinander versetzten Messern 4 versehen, die zur Bildung eines Querschnitts mit auf dem Sammelzylinder 2 angeordneten Gegenmessern 5, in Form von Schneidnuten oder Gegenhalteschienen oder dergleichen, zusammenwirken. Der Sammelzylinder 2 ist ein dreiteiliger Zylinder. Dementsprechend sind drei um 120° gegeneinander versetzte Gegenmesser 5 vorgesehen. Der Sammelzylinder 2 ist ferner mit den Gegenmessern 5 zugeordneten, gegenüber diesen in Drehrichtung nach vorne versetzten Greifern 6 und mit zwischen den Greifern 6 und den zugeordneten Gegenmessern 5 angeordneten Falzmessern 7 versehen. Diese wirken mit Falzklappen 8 des Falzklappenzylinders 3 zusammen, der wie der Messerzylinder 1 als zweiteiliger Zylinder ausgebildet ist.The folding apparatus on which FIG. 1 is based comprises a knife cylinder 1, a collecting cylinder 2 positioned thereon and a folding jaw cylinder 3 interacting with it. The knife cylinder 1 is provided with two knives 4 which are offset by 180 ° and which form a cross-section on the collecting cylinder 2 arranged counter knives 5, in the form of cutting grooves or counter holding rails or the like, cooperate. The collecting cylinder 2 is a three-part cylinder. Accordingly, three counter knives 5 offset by 120 ° are provided. The collecting cylinder 2 is further provided with the counter-knives 5, which are offset relative to them in the direction of rotation forward grippers 6 and with folding knives 7 arranged between the grippers 6 and the associated counter-knives 5. These interact with jaws 8 of the jaw cylinder 3, which like the knife cylinder 1 is designed as a two-part cylinder.

Die Zylinder 1, 2, 3 werden mit von der Geschwindigkeit der in den Schneidspalt zwischen dem Messerzylinder 1 und dem Sammelzylinder 2 einlaufenden Bahn 9 unabhängiger, gleicher Umfangsgeschwindigkeit angetrieben, so daß unterschiedliche Abschnittlängen herstellbar sind. Die Greifer 6 und Falzmesser 7 des Sammelzylinders 2 und mit den Falzmessern die Falzklappen 8 des Falzklappenzylinders 3 sind formatabhängig einstellbar. Die Greifer 6 sind so gesteuert, daß sie das vordere Produktende erst erfassen, nachdem das hintere Ende durch einen Querschnitt von der Bahn 9 getrennt ist und der so hergestellte Bahnabschnitt 9a die von der Bahngeschwindigkeit abweichende Zylinderumfangsgeschwindigkeit annehmen kann.The cylinders 1, 2, 3 are driven with the same circumferential speed independent of the speed of the web 9 entering the cutting gap between the knife cylinder 1 and the collecting cylinder 2, so that different section lengths can be produced. The grippers 6 and folding blades 7 of the collecting cylinder 2 and, with the folding blades, the folding jaws 8 of the folding jaw cylinder 3 can be adjusted depending on the format. The grippers 6 are controlled in such a way that they only grip the front end of the product after the rear end is separated from the web 9 by a cross section and the web section 9a thus produced can assume the cylinder peripheral speed which deviates from the web speed.

Der vom Messerzylinder 1 in Drehrichtung zum Falzklappenzylinder 3 führende Umfangsbereich des Sammelzylinders 2 ist von einer Bandführung 10 umfaßt, die mit Zylinderumfangsgeschwindigkeit angetrieben wird. Die Bandführung 10 hält den bei jedem Querschnitt entstehenden Bahnanfang bzw. die Bahnabschnitte 9 in Anlage am Sammelzylinder 2, so daß die Greifer 6 die Abschnittvorderkante erfassen können. Die Bänder der Bandführung 10 werden durch im Auslaufbereich des Schneidspalts zwischen dem Messerzylinder 1 und dem Sammelzylinder 2 und im Einlaufbereich des Falzspalts zwischen dem Sammelzylinder 2 und dem Falzklappenzylinder 3 angeordnete Umlenkwalzen 11 umgelenkt.The circumferential region of the collecting cylinder 2 leading from the knife cylinder 1 in the direction of rotation to the folding jaw cylinder 3 is encompassed by a belt guide 10 which is driven at the circumferential cylinder speed. The belt guide 10 holds the web start or web sections 9 which arises with each cross section in contact with the collecting cylinder 2, so that the grippers 6 can grasp the front edge of the section. The strips of the strip guide 10 are deflected by deflecting rollers 11 arranged in the outlet region of the cutting gap between the knife cylinder 1 and the collecting cylinder 2 and in the inlet region of the folding gap between the collecting cylinder 2 and the folding jaw cylinder 3.

Zwischen der Schnittstelle und der benachbarten Umlenkwalze 11 ergibt sich zwangsläufig ein gewisser Abstand. Um den bei jedem Schnitt entstehenden, freien Bahnanfang vor seinem Einlauf in den Spalt zwischen der Bandführung 10 und dem Sammelzylinder 2 in zuverlässige und saubere Anlage am Sammelzylinder 2 zu bringen und eine Wellenbildung des Bahnmaterials zu verhindern, ist der Messerzylinder 1 mit seinen Messern 4 nachlaufenden Blasdüsen 12 versehen, die beim Durchlaufen des Schneidspalts und des hieran sich anschließenden Zwickels an eine Druckluftquelle anschließbar sind. Durch den Staudruck der aus den Blasdüsen 12 austretenden Luftstrahlen wird das Bahnmaterial an den Sammelzylinder 2 angedrückt, wie in Figur 1 durch den Pfeil 13 angedeutet ist. Die Blasdüsen 12 werden einfach durch Radial- oder Sekantenbohrungen gebildet, von denen weitere Bohrungen abgehen können, so daß sich in Umfangsrichtung reihenmäßig hintereinander angeordnete Blasdüsen 12 ergeben. Selbstverständlich ist es möglich, den Düsenausgang mit Nippeln zu bestücken, die einstellbar sein können und eine starke Strahlbündelung ermöglichen. In Zylinderlängsrichtung sind die Blasdüsen 12 gleichmäßig über die Zylinderlänge verteilt. Zusätzlich oder alternativ zu den Blasdüsen 12 des Messerzylinders 1 könnte der Sammelzylinder 2 mit den Gegenmessern 5 nachlaufenden, an eine Vakuumquelle anschließbaren Saugdüsen versehen sein, durch die das Bahnmaterial an den Sammelzylinder 2 angezogen werden könnte.A certain distance inevitably results between the interface and the adjacent deflecting roller 11. In order to bring the free path beginning with each cut into reliable and clean contact with the collecting cylinder 2 before it enters the gap between the band guide 10 and the collecting cylinder 2 and to prevent the web material from forming waves, the knife cylinder 1 with its knives 4 is trailing Provide blowing nozzles 12, which can be connected to a compressed air source when passing through the cutting gap and the gusset connected thereafter. Due to the dynamic pressure of the air jets emerging from the blowing nozzles 12, the web material is pressed against the collecting cylinder 2, as indicated by the arrow 13 in FIG. 1. The blowing nozzles 12 are simply formed by radial or secant bores from which further bores can originate, so that there are blowing nozzles 12 arranged one after the other in the circumferential direction. Of course, it is possible to equip the nozzle outlet with nipples, which can be adjustable and allow strong beam focusing. In the cylinder longitudinal direction, the blowing nozzles 12 are distributed uniformly over the cylinder length. In addition or as an alternative to the blowing nozzles 12 of the knife cylinder 1, the collecting cylinder 2 could be provided with suction nozzles which follow the counter knives 5 and can be connected to a vacuum source and through which the web material could be attracted to the collecting cylinder 2.

Im dargestellten Ausführungsbeispiel ist im Bereich des an den Schneidspalt sich anschließenden Zwickels eine den Abstand zwischen dem Schneidspalt und der Bandführung 10 überbrückende, stationäre Leiteinrichtung 14 vorgesehen, die eine mechanische Führung des aus dem Schneidspalt auslaufenden Materials gewährleistet. Diese Leiteinrichtung besteht, wie am besten aus Figur 2 erkennbar ist, aus mehreren, mit Abstand nebeneinander angeordneten Leitzungen 15. Diese sind so voneinander beabstandet, daß die Blasdüsen 12 zwischen ihnen durchblasen können, wie in Figur 2 durch Pfeil 13 angedeutet ist. Die Blasdüsen 12 sind dementsprechend in Zylinderlängsrichtung bezüglich der Leitzungen 15 auf Lücke gesetzt. Die Leitzungen 15 sind auf einer über die Maschinenbreite durchgehenden Traverse 16 aufgenommen. Diese ist, wie Figur 1 erkennen läßt, so angeordnet, daß sie die den Zwischenraum 17 zwischen benachbarten Leitzungen 15 durchdringenden Luftstrahlen nicht behindert, d. h. die zylinderseitigen Flanken der im Querschnitt etwa dreieckförmigen Leitzungen 15 sind zumindest teilweise freigelassen.In the illustrated embodiment, in the area of the gusset adjoining the cutting gap, there is a distance between the cutting gap and the band guide 10 bridging, stationary guide device 14 is provided, which ensures mechanical guidance of the material flowing out of the cutting gap. As can best be seen in FIG. 2, this guide device consists of a plurality of guide tongues 15 arranged at a distance from one another. These are spaced apart from one another in such a way that the blowing nozzles 12 can blow through between them, as indicated in FIG. 2 by arrow 13. The blowing nozzles 12 are accordingly set to a gap in the longitudinal direction of the cylinder with respect to the guide tongues 15. The guide tongues 15 are received on a traverse 16 which is continuous over the machine width. This is, as can be seen in FIG. 1, arranged so that it does not hinder the air jets penetrating the space 17 between adjacent guide tongues 15, ie the cylinder-side flanks of the guide tongues 15, which are approximately triangular in cross section, are at least partially left free.

Die Blasdüsen 12 sind, wie am besten aus Figur 3 erkennbar ist, über eine im Bereich der Achszapfen 18 des Messerzylinders 1 vorgesehene Drehdurchführung 19 und ein zylinderseitiges Bohrungssystem an eine Druckluftquelle, hier in Form einer an das betriebsinterne Druckluftnetz angeschlossenen Druckluftleitung 20 angeschlossen. Um eine einfache Selbststeuerung der Druckluftbeaufschlagung der Blasdüsen 12 beim Durchlaufen des Schneidspalts und des hieran sich anschließenden Zwickelbereichs zu erreichen, können die den gegeneinander versetzten Messern 4 des Messerzylinders 1 zugeordneten Blasdüsen über eigene, im Bereich desselben oder verschiedener Achszapfen 18 angeordnete Drehdurchführungen 19 und diesen zugeordnete Bohrungssysteme mit Druckluft versorgt werden. Das den jeweils einem Messer 4 nachlaufenden Blasdüsen 12 jeweils zugeordnete Bohrungssystem führt, wie Figur 3 weiter erkennen läßt, von den die Blasdüsen 12 bildenden Radialbohrungen zu einer stirnseitig verschlossenen, über die Zylinderlänge durchgehenden Axialbohrung 21, von der die die Blasdüsen 12 bildenden Radialbohrungen abgehen und die über eine umfangsseitig ebenfalls verschlossene Radialbohrung 22 mit einer zentralen, stirnseitig verschlossenen Axialsackbohrung 23 verbunden ist, von der eine radiale Anschlußbohrung 24 abgeht. Diese befindet sich im Bereich einer über die Gestellwandung 25 hinausgehenden Verlängerung des Achszapfens 18.The blowing nozzles 12, as can best be seen from FIG. 3, are connected to a compressed air source, in the form of a compressed air line 20 connected to the in-house compressed air network, via a rotating union 19 provided in the area of the axle journal 18 of the knife cylinder 1 and a cylinder-side bore system. In order to achieve simple self-control of the compressed air supply to the blowing nozzles 12 as they pass through the cutting gap and the gusset area adjoining them, the blowing nozzles assigned to the offset knives 4 of the knife cylinder 1 can be assigned via their own rotary unions 19 arranged in the area of the same or different axle journals 18 and assigned to these Drilling systems can be supplied with compressed air. As can further be seen from FIG. 3, the bore system associated with each of the blow nozzles 12 following a knife 4 leads from the radial bores forming the blow nozzles 12 to an axial bore 21 which is closed at the end and is continuous over the cylinder length and from which the radial bores forming the blow nozzles 12 depart and which is connected via a radial bore 22, which is likewise closed on the circumferential side, to a central axial blind bore 23, which is closed on the end face and from which a radial connecting bore 24 extends. This is located in the region of an extension of the journal 18 that extends beyond the frame wall 25.

Die Drehdurchführung 19 enthält einen mit einer zylinderachsparallelen Bohrung versehenen Block 26, der auf die die Anschlußbohrung 24 enthaltende Verlängerung des Achszapfens 18 aufgesteckt ist. Der bezüglich der Zylinderachse schwenkbare Block 26 ist mittels einer Halteschraube 27 mit der benachbarten Gestellwandung 25 verbindbar und so gegen Verdrehung sicherbar. In axialer Richtung ist der Block 26 durch Spannringe und Distanzbüchsen gesichert. Der Block 26 ist mit einer einen Verrsogungskanal 28 bildenden Radialbohrung versehen, an deren umfangsseitiges Ende die Druckluftleitung 20 anschließt und die bis zur zylinderachsparallelen Bohrung des Blocks 26 durchgeht. Die dortige, innere Mündung des Versorgungskanals 28 wird dementsprechend bei jeder Umdrehung des Messerzylinders 1 vom im Bereich des Umfangs des Achszapfens 18 sich befindenden Ende der Anschlußbohrung 24 überfahren, wobei eine Druckluftbeaufschlagung der Blasdüsen 12 erfolgt. Zum Anschluß der Druckluftleitung 20 an das äußere Ende des Versorgungskanals 28 kann ein Nippel vorgesehen sein.The rotary union 19 contains a block 26 which is provided with a bore parallel to the cylinder and which is plugged onto the extension of the journal 18 containing the connection bore 24. The block 26, which can be pivoted with respect to the cylinder axis, can be connected to the adjacent frame wall 25 by means of a retaining screw 27 and can thus be secured against rotation. In the axial direction, the block 26 is secured by clamping rings and spacer sleeves. The block 26 is provided with a radial bore forming a retraction channel 28, at the circumferential end of which the compressed air line 20 connects and which extends through to the bore of the block 26 parallel to the cylinder. Accordingly, the inner mouth of the supply channel 28 is run over at each revolution of the knife cylinder 1 by the end of the connecting bore 24 located in the region of the circumference of the axle journal 18, with the blowing nozzles 12 being pressurized with compressed air. For connecting the compressed air line 20 at the outer end of the supply channel 28, a nipple can be provided.

Um den Winkelbereich, in welchem eine Druckluftbeaufschlagung der Blasdüsen 12 erfolgen soll, einzustellen, wird einfach die Halteschraube 27 gelöst und der Block 26 entsprechend verdreht. Dieser ist dementsprechend, wie am besten aus Figur 4 erkennbar ist, mit einem von der Halteschraube 27 durchgriffenen, zur Zylinderachse konzentrischen Langloch 29 versehen.In order to set the angular range in which compressed air is to be applied to the blow nozzles 12, the holding screw 27 is simply loosened and the block 26 is rotated accordingly. Accordingly, as can best be seen from FIG. 4, the latter is provided with an elongated hole 29, penetrated by the retaining screw 27 and concentric with the cylinder axis.

Im dargestellten Ausführungsbeispiel ist in den Block 26 eine Büchse 30 eingesetzt, die eine umfangsseitige Aussparung 31 aufweist, in welche der Versorgungskanal 28 einläuft. Die Aussparung 31 bildet dabei praktisch eine Steuerkammer zur Verlängerung der Druckluftbeaufschlagung der Blasdüsen 10 über den dem Durchmesser der den Versorgungskanal 28 bildenden Radialbohrung entsprechenden Winkelbereich hinaus. Die Aussparung 31 erstreckt sich dementsprechend über einen Umfangswinkel, der etwa dem Winkelabstand zwischen der Schnittstelle und der benachbarten Umlenkwalze 11 entspricht.In the exemplary embodiment shown, a bushing 30 is inserted into the block 26 and has a circumferential recess 31 into which the supply channel 28 runs. The recess 31 practically forms a control chamber for extending the compressed air supply to the blowing nozzles 10 beyond the angular range corresponding to the diameter of the radial bore forming the supply channel 28. The cutout 31 accordingly extends over a circumferential angle which corresponds approximately to the angular distance between the interface and the adjacent deflecting roller 11.

Claims (8)

  1. A folder comprising a knife cylinder (1) able to be driven independently of the speed as the fed web (9) and which cooperates with a mating cylinder (2) for the production of web sections (9a), said mating cylinder (2) being provided with grippers (6) to engage the leading edges of the sections and the peripheral part thereof leaving the cutting gap being encircled by a belt guide (10), characterized in that in its part following its knives (4) the knife cylinder (1) is provided with jet nozzles (12) directed towards the opposite cylinder (2), which nozzles are able to be connected with a source of compressed air and in that in the widening space following the cutting gap, a stationary guide device (14) is arranged which is associated with the belt guide (10), said guide device (14) consisting of adjacently arranged guide lugs (15) with whose gaps the nozzles (12) are aligned.
  2. The folder as claimed in claim 1, characterized in that on moving through the cutting gap and the widening part adjoining the same the nozzles (12) are able to be activated and outside thereof to be passivated.
  3. The folder as claimed either of the preceding claims, characterized in that the guide lugs (15) are mounted on a continuous crosspiece (16), which at least partly leaves the flanks of the guide lugs (15) on the cylinder side uncovered.
  4. The folder as claimed in any one of the preceding claims, characterized in that in each case a plurality of nozzles (12) are provided one after the other in a row.
  5. The folder as claimed in any one of the preceding claims, characterized in that the cylinder (1) having the nozzles (12) is provided adjacent to at least one trunnion with at least one connection hole (24) opening radially and connected with a nozzles (12) and adjacent to the connection hole (24) is encompassed by a block (26) locked against rotation and having a supply duct (28) connected with a unit producing a differential pressure, the inner opening of the duct (28) being swept by the outer opening of the connection duct (24).
  6. The folder as claimed in claim 5, characterized in that the block (26) is able to be pivoted and locked in position in relation to the axis of the associated cylinder (1).
  7. The folder as claimed in claim 5 or in claim 6, characterized in that on an opening end thereof the supply duct (28) merges with a control chamber (31) whose extent in the peripheral direction is larger than the diameter of the connection hole (24) moving past it.
  8. The folder as claimed in any one of the claims 5 through 7, characterized in that a bushing (30) comprising the control (31) is set in the block (26).
EP90102282A 1989-02-11 1990-02-06 Folding apparatus Expired - Lifetime EP0383148B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3904076 1989-02-11
DE3904076A DE3904076A1 (en) 1989-02-11 1989-02-11 FOLDING APPARATUS

Publications (3)

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EP0383148A2 EP0383148A2 (en) 1990-08-22
EP0383148A3 EP0383148A3 (en) 1991-04-03
EP0383148B1 true EP0383148B1 (en) 1994-04-20

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EP90102282A Expired - Lifetime EP0383148B1 (en) 1989-02-11 1990-02-06 Folding apparatus

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US (1) US5004451A (en)
EP (1) EP0383148B1 (en)
JP (1) JPH0643233B2 (en)
DE (2) DE3904076A1 (en)

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Also Published As

Publication number Publication date
JPH02261774A (en) 1990-10-24
JPH0643233B2 (en) 1994-06-08
DE3904076A1 (en) 1990-08-16
EP0383148A2 (en) 1990-08-22
US5004451A (en) 1991-04-02
DE3904076C2 (en) 1993-03-25
DE59005396D1 (en) 1994-05-26
EP0383148A3 (en) 1991-04-03

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