EP0400596B1 - Cutting device for a folder in a printing machine - Google Patents

Cutting device for a folder in a printing machine Download PDF

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Publication number
EP0400596B1
EP0400596B1 EP90110234A EP90110234A EP0400596B1 EP 0400596 B1 EP0400596 B1 EP 0400596B1 EP 90110234 A EP90110234 A EP 90110234A EP 90110234 A EP90110234 A EP 90110234A EP 0400596 B1 EP0400596 B1 EP 0400596B1
Authority
EP
European Patent Office
Prior art keywords
air
cutting
web
grooves
cutting device
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
EP90110234A
Other languages
German (de)
French (fr)
Other versions
EP0400596A2 (en
EP0400596A3 (en
Inventor
Bernd Glaser
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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Filing date
Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0400596A2 publication Critical patent/EP0400596A2/en
Publication of EP0400596A3 publication Critical patent/EP0400596A3/en
Application granted granted Critical
Publication of EP0400596B1 publication Critical patent/EP0400596B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/54—Auxiliary folding, cutting, collecting or depositing of sheets or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D2007/082—Guiding or pushing a web into a favorable position by deflector 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
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/13—Details of longitudinal profile
    • B65H2404/131—Details of longitudinal profile shape
    • B65H2404/1316—Details of longitudinal profile shape stepped or grooved
    • B65H2404/13161—Regularly spaced grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/13—Details of longitudinal profile
    • B65H2404/131—Details of longitudinal profile shape
    • B65H2404/1316—Details of longitudinal profile shape stepped or grooved
    • B65H2404/13162—Helicoidal grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/13—Details of longitudinal profile
    • B65H2404/133—Limited number of active elements on common axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2066—By fluid current
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2066—By fluid current
    • Y10T83/207—By suction means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/6472—By fluid current

Definitions

  • the invention relates to a cutting device for a folding unit of a printing press with two cutting cylinders for the vertically fed web and downstream conveyor belt lines, which run over deflection rollers and carry the cut products between them.
  • Such a folder is known from the "Lithoman M” brochure from MAN Roland Druckmaschinen AG, page 6. With this folder, the cut products are without a guide on the way between the cutting cylinders on the one hand and the conveyor belts on the other. It is disadvantageous here that the front cutting edges of the products tend to stick to the teeth of the knife of the one cutting cylinder for a short time. If the leading edge detaches from the cutting cylinder with a slight delay, the direction in which the cut product runs off the cutting cylinders is changed. The front edge then abuts a deflection roller and forms kinked corners when it is pulled in between the conveyor belts. The leading edges may also adhere to a cutting cylinder as a result of electrostatic charging. Such charges can not only occur unintentionally during operation, they are rather deliberately provided in multi-layer webs in order to hold the individual cut sheets together.
  • a cutting device is also already known (DE 28 22 137 A1), in which, for better guidance of the leading edge of the products on both sides of the incoming web, blowing nozzles directed into the gap between the web and cutting cylinder and grooves in the cutting cylinders for the passage of the blowing air are arranged parallel to the web are. At higher web speeds, however, the leading edge of the sheet tends to flutter and misses the inlet gap formed by conveyor belts.
  • the invention has for its object to provide a guide for the cut products between the cutting cylinders and the conveyor belts in a generic cutting device, which ensures an exact entry of the products between the conveyor belt lines.
  • suction nozzles for extracting the air passing through the grooves are arranged between the deflection rollers of the conveyor belt lines. This measure favors the formation of an air cushion carrying the cut products, in particular turbulence in the air behind the cutting cylinders is reduced.
  • the blowing nozzles are advantageously arranged to be adjustable in order to change the direction of the blow-out.
  • the blown air volume and / or the suction air volume can be adjustable according to preferred embodiments.
  • the arrangement according to FIGS. 1 and 2 has two cutting cylinders 1, 2, one of which carries two knives 3, while the other is provided with corresponding resilient bearings 4. Between the two cutting cylinders 1, 2, 5 products are produced from a web that runs vertically from above in the direction of arrow a cut off. These products are detected by conveyor belt lines 6, 7 and passed on in the direction of arrow b.
  • the conveyor belt lines 5, 6 consist of several narrow belts, which are guided over deflection rollers, for example 8, 9, and are driven in a manner known per se, not shown in detail.
  • blowing air nozzles Arranged on both sides of the incoming web 5 are a plurality of blowing air nozzles, generally designated 10 or 11.
  • the side-by-side blowing air nozzles 10 are supplied with compressed air by means of an air supply line 12 and the side-by-side blowing air nozzles 11 are supplied with compressed air.
  • Each blowing air nozzle expediently has e.g. 10 a clamp 14 which can be fixed in different angular positions on the air supply line 12 by means of a screw 15 which is only indicated schematically.
  • blowing air nozzles 10, 11 can also be firmly connected to the air supply lines. Then the air supply lines must be rotatably supported.
  • the air supply lines 12, 13 are connected to a known compressed air generator, not shown.
  • a valve 16, 17 is arranged in each of the two lines between the compressed air generator and the blown air nozzles 10, 11. With the valve, the blown air volume passing through to the blown air nozzles 10, 11 can be adjusted in order to enable both adaptation to single-layer webs of different thicknesses and to webs from several layers.
  • each air supply line 12, 13 could be assigned its own pump, which can be regulated with regard to the blown air volume.
  • a plurality of grooves 18, 19 are cut in the cutting cylinders 1, 2 and run in the circumferential direction.
  • the blowing air passes through the grooves approximately parallel to the running direction of the web 5 and thus forms air cushions on both sides of the web 5, which guide the cut products in the direction of the conveyor belt lines 6, 7.
  • the grooves 18, 19 are arranged in the area of the blowing air nozzles 10, 11.
  • cutting cylinders 20 can also be used, into which a spiral groove 21 for air guidance is cut.
  • suction nozzles 22, 23 are arranged between the deflection rollers 8, 9 for the conveyor belt lines 6, 7.
  • the suction nozzles 22, 23, again adjustable in their angular position, can be fastened by means of clamps 24, 25 to air ducts 26, 27.
  • the air discharge lines 26, 27 are connected to a common air-sucking pump.
  • each of the two air discharge lines can also be assigned its own suction pump.
  • the compressed air emerging from the blown air nozzles 10, 11 flows through the grooves 18, 19 and 21 and forms an air cushion behind the narrowest point between the cutting cylinders 2, 3. On the one hand, this prevents a leading edge of the web 5 from sticking to a cutting cylinder 2, 3. On the other hand, the web 5 is guided along the desired line between the conveyor belt lines 6, 7. If the web 5 consists of several layers, these are additionally held together.
  • the suction air nozzles 22, 23 counteract a possible tearing of the air cushion in that a largely rectilinear air flow is forced from the grooves 18, 19 of the cutting cylinders 2, 3 to the deflection rollers 8, 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Description

Die Erfindung betrifft eine Schneidvorrichtung für ein Falzwerk einer Druckmaschine mit zwei Schneidzylindern für die senkrecht zugeführte Bahn und nachgeschalteten Transportbandleitungen, die über Umlenkrollen laufen und die abgeschnittenen Produkte zwischen sich weiterführen.The invention relates to a cutting device for a folding unit of a printing press with two cutting cylinders for the vertically fed web and downstream conveyor belt lines, which run over deflection rollers and carry the cut products between them.

Ein derartiges Falzwerk ist aus dem Prospekt "Lithoman M" der Firma MAN Roland Druckmaschinen AG, Seite 6 bekannt. Bei diesem Falzwerk sind die geschnittenen Produkte auf dem Weg zwischen den Schneidzylindern einerseits und den Transportbändern andererseits ohne Führung. Hierbei ist nachteilig, daß die vorderen Schnittkanten der Produkte dazu neigen, für eine kurze Zeit an den Zähnen des Messers des einen Schneidzylinders haften zu bleiben. Löst sich die Vorderkante etwas verzögert von dem Schneidzylinder, so wird die Richtung, in der das abgeschnittene Produkt von den Schneidzylindern abläuft, geändert. Die Vorderkante stößt dann gegen eine Umlenkrolle und bildet beim Einziehen zwischen die Transportbänder abgeknickte Ecken. Ein Haften der Vorderkanten an einen Schneidzylinder kann auch infolge einer elektrostatischen Aufladung auftreten. Derartige Aufladungen können nicht nur ungewollt während des Betriebes auftreten, sie werden vielmehr bei mehrlagigen Bahnen bewußt vorgesehen, um die einzelnen geschnittenen Bogen zusammenzuhalten.Such a folder is known from the "Lithoman M" brochure from MAN Roland Druckmaschinen AG, page 6. With this folder, the cut products are without a guide on the way between the cutting cylinders on the one hand and the conveyor belts on the other. It is disadvantageous here that the front cutting edges of the products tend to stick to the teeth of the knife of the one cutting cylinder for a short time. If the leading edge detaches from the cutting cylinder with a slight delay, the direction in which the cut product runs off the cutting cylinders is changed. The front edge then abuts a deflection roller and forms kinked corners when it is pulled in between the conveyor belts. The leading edges may also adhere to a cutting cylinder as a result of electrostatic charging. Such charges can not only occur unintentionally during operation, they are rather deliberately provided in multi-layer webs in order to hold the individual cut sheets together.

Es ist auch bereits eine Schneidvorrichtung bekannt (DE 28 22 137 A1), bei der zur verbesserten Führung der Vorderkante der Produkte beiderseits der ankommenden Bahn in den Spalt zwischen Bahn und Schneidzylinder gerichtete Blasdüsen und in den Schneidzylindern Nuten zum Durchtritt der Blasluft parallel zur Bahn angeordnet sind. Bei höheren Bahngeschwindigkeiten neigt jedoch die Bogenvorderkante zum Flattern und verfehlt den von Transportbändern gebildeten Einlaufspalt.A cutting device is also already known (DE 28 22 137 A1), in which, for better guidance of the leading edge of the products on both sides of the incoming web, blowing nozzles directed into the gap between the web and cutting cylinder and grooves in the cutting cylinders for the passage of the blowing air are arranged parallel to the web are. At higher web speeds, however, the leading edge of the sheet tends to flutter and misses the inlet gap formed by conveyor belts.

Der Erfindung liegt die Aufgabe zugrunde, bei einer gattungsgemäßen Schneidvorrichtung eine Führung für die geschnittenen Produkte zwischen den Schneidzylindern und den Transportbändern zu schaffen, die einen exakten Einlauf der Produkte zwischen die Transportbandleitungen sicherstellt.The invention has for its object to provide a guide for the cut products between the cutting cylinders and the conveyor belts in a generic cutting device, which ensures an exact entry of the products between the conveyor belt lines.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß zwischen den Umlenkrollen der Transportbandleitungen Saugdüsen zur Absaugung der durch die Nuten durchtretenden Luft angeordnet sind. Durch diese Maßnahme wird die Bildung eines die abgeschnittenen Produkte führenden Luftpolsters begünstigt, insbesondere werden Verwirbelungen der Luft hinter den Schneidzylindern vermindert.This object is achieved according to the invention in that suction nozzles for extracting the air passing through the grooves are arranged between the deflection rollers of the conveyor belt lines. This measure favors the formation of an air cushion carrying the cut products, in particular turbulence in the air behind the cutting cylinders is reduced.

Um die Luftführung an Bahnen unterschiedlicher Stärke oder mit einer unterschiedlichen Zahl von Lagen anpassen zu können, sind die Blasdüsen zur Änderung der Ausblaserichtung vorteilhaft einstellbar angeordnet. Zum gleichen Zweck können gemäß bevorzugten Ausführungsformen das Blasluftvolumen und/oder das Saugluftvolumen einstellbar sein.In order to be able to adapt the air flow to webs of different thicknesses or with a different number of layers, the blowing nozzles are advantageously arranged to be adjustable in order to change the direction of the blow-out. For the same purpose, the blown air volume and / or the suction air volume can be adjustable according to preferred embodiments.

Auf der Zeichnung sind zwei Ausführungsbeispiele der Erfindung wiedergegeben. Es zeigt

Fig. 1
eine schematische Seitenansicht des Erfindungsgegenstandes,
Fig. 2
eine Ansicht von oben in verkleinertem Maßstab und
Fig. 3
eine Variante der Schneidzylinderausbildung.
Two exemplary embodiments of the invention are shown in the drawing. It shows
Fig. 1
2 shows a schematic side view of the subject of the invention,
Fig. 2
a view from above on a reduced scale and
Fig. 3
a variant of the cutting cylinder training.

Die Anordnung gemäß Fig. 1 und 2 weist zwei Schneidzylinder 1, 2 auf, von denen der eine zwei Messer 3 trägt, während der andere mit entsprechenden nachgiebigen Wiederlagern 4 versehen ist. Zwischen den beiden Schneidzylindern 1, 2 werden von einer senkrecht von oben in Richtung des Pfeiles a einlaufenden Bahn 5 Produkte abgeschnitten. Diese Produkte werden von Transportbandleitungen 6, 7 erfaßt und in Richtung des Pfeiles b weitergeleitet. Die Transportbandleitungen 5, 6 bestehen aus mehreren schmalen Bändern, die über Umlenkrollen z.B. 8, 9 geführt und in an sich bekannter, nicht näher dargestellter Weise angetrieben sind.The arrangement according to FIGS. 1 and 2 has two cutting cylinders 1, 2, one of which carries two knives 3, while the other is provided with corresponding resilient bearings 4. Between the two cutting cylinders 1, 2, 5 products are produced from a web that runs vertically from above in the direction of arrow a cut off. These products are detected by conveyor belt lines 6, 7 and passed on in the direction of arrow b. The conveyor belt lines 5, 6 consist of several narrow belts, which are guided over deflection rollers, for example 8, 9, and are driven in a manner known per se, not shown in detail.

Beiderseits der ankommenden Bahn 5 sind mehrere insgesamt mit 10 bzw. 11 bezeichnete Blasluftdüsen angeordnet. Die nebeneinander angeordneten Blasluftdüsen 10 werden mittels einer Luftzuleitung 12 und die nebeneinander angeordneten Blasluftdüsen 11 mittels einer Luftzuleitung 13 mit Druckluft versorgt. Zweckmäßig weist jede Blasluftdüse z.B. 10 eine Schelle 14 auf, die mittels einer nur schematisch angedeuteten Schraube 15 in unterschiedlichen Winkellagen auf der Luftzuleitung 12 festgelegt werden kann.Arranged on both sides of the incoming web 5 are a plurality of blowing air nozzles, generally designated 10 or 11. The side-by-side blowing air nozzles 10 are supplied with compressed air by means of an air supply line 12 and the side-by-side blowing air nozzles 11 are supplied with compressed air. Each blowing air nozzle expediently has e.g. 10 a clamp 14 which can be fixed in different angular positions on the air supply line 12 by means of a screw 15 which is only indicated schematically.

Hierdurch besteht die Möglichkeit, die Richtung mit der der Druckluftstrom aus den Blasdüsen 10, 11 in den Spalt zwischen der Bahn 5 und dem jeweiligen Schneidzylinder 2 bzw. 3 eintritt einzustellen. Die Blasluftdüsen können auch fest mit den Luftzuleitungen verbunden sein. Dann sind die Luftzuleitungen drehbar zu lagern.This makes it possible to set the direction in which the compressed air flow from the blowing nozzles 10, 11 enters the gap between the web 5 and the respective cutting cylinder 2 or 3. The blowing air nozzles can also be firmly connected to the air supply lines. Then the air supply lines must be rotatably supported.

Die Luftzuleitungen 12, 13 sind an einen nicht dargestellten bekannten Drucklufterzeuger angeschlossen. In jeder der beiden Leitungen ist zwischen dem Drucklufterzeuger und den Blasluftdüsen 10, 11 je ein Ventil 16, 17 angeordnet. Mit dem Ventil kann das zu den Blasluftdüsen 10, 11 durchtretende Blasluftvolumen eingestellt werden, um sowohl eine Anpassung an einlagige Bahnen verschiedener Stärke als auch an Bahnen aus mehreren Lagen zu ermöglichen. Alternativ könnte auch jeder Luftzuleitung 12, 13 eine eigene, hinsichtlich des Blasluftvolumens regelbare Pumpe zugeordnet werden.The air supply lines 12, 13 are connected to a known compressed air generator, not shown. A valve 16, 17 is arranged in each of the two lines between the compressed air generator and the blown air nozzles 10, 11. With the valve, the blown air volume passing through to the blown air nozzles 10, 11 can be adjusted in order to enable both adaptation to single-layer webs of different thicknesses and to webs from several layers. Alternatively, each air supply line 12, 13 could be assigned its own pump, which can be regulated with regard to the blown air volume.

In den Schneidzylindern 1, 2 sind mehrere Nuten 18, 19 eingeschnitten, die in Umfangsrichtung verlaufen. Durch die Nuten tritt die Blasluft etwa parallel zur Laufrichtung der Bahn 5 durch und bildet somit beiderseits der Bahn 5 Luftpolster, die die abgeschnittenen Produkte in Richtung zu den Transportbandleitungen 6, 7 führen. Die Nuten 18, 19 sind im Bereich der Blasluftdüsen 10, 11 angeordnet.A plurality of grooves 18, 19 are cut in the cutting cylinders 1, 2 and run in the circumferential direction. The blowing air passes through the grooves approximately parallel to the running direction of the web 5 and thus forms air cushions on both sides of the web 5, which guide the cut products in the direction of the conveyor belt lines 6, 7. The grooves 18, 19 are arranged in the area of the blowing air nozzles 10, 11.

Wie Fig. 3 zeigt, können auch Schneidzylinder 20 Verwendung finden, in die eine spiralförmig umlaufende Nut 21 zur Luftführung eingeschnitten ist.As FIG. 3 shows, cutting cylinders 20 can also be used, into which a spiral groove 21 for air guidance is cut.

Unterhalb der Schneidzylinder 1, 2 sind zwischen den Umlenkrollen 8, 9 für die Transportbandleitungen 6, 7 Saugdüsen 22, 23 angeordnet. Die Saugdüsen 22, 23 können, wiederum in ihrer Winkellage einstellbar, mittels Schellen 24, 25 auf Luftableitungen 26, 27 befestigt sein. Die Luftableitungen 26, 27 sind an eine gemeinsame luftansaugende Pumpe angeschlossen. Es kann jedoch auch jeder der beiden Luftableitungen eine eigene Saugpumpe zugeordnet sein. Weiterhin besteht auch hier die Möglichkeit, ebenso wie bei den Luftzuleitungen 12, 13 das Saugluftvolumen durch einstellbare Ventile oder einstellbare Saugluftpumpen zu verändern.Below the cutting cylinders 1, 2, suction nozzles 22, 23 are arranged between the deflection rollers 8, 9 for the conveyor belt lines 6, 7. The suction nozzles 22, 23, again adjustable in their angular position, can be fastened by means of clamps 24, 25 to air ducts 26, 27. The air discharge lines 26, 27 are connected to a common air-sucking pump. However, each of the two air discharge lines can also be assigned its own suction pump. Furthermore, there is also the possibility, as with the air supply lines 12, 13, of changing the suction air volume by means of adjustable valves or adjustable suction air pumps.

Im Betrieb strömt die aus den Blasluftdüsen 10, 11 austretende Druckluft durch die Nuten 18, 19 bzw. 21 durch und bildet hinter der engsten Stelle zwischen den Schneidzylindern 2, 3 ein Luftpolster. Hierdurch wird zum einen eine Vorderkante der Bahn 5 daran gehindert, an einem Schneidzylinder 2, 3 haften zu bleiben. Zum anderen wird die Bahn 5 entlang der Solllinie zwischen die Transportbandleitungen 6, 7 geführt. Besteht die Bahn 5 aus mehreren Lagen, so werden diese zusätzlich zusammengehalten. Die Saugluftdüsen 22, 23 wirken dabei einem möglichen Aufreißen des Luftpolsters dadurch entgegen, daß ein weitgehend geradliniger Luftfluß von den Nuten 18, 19 der Schneidzylinder 2, 3 bis zu den Umlenkrollen 8, 9 erzwungen wird.In operation, the compressed air emerging from the blown air nozzles 10, 11 flows through the grooves 18, 19 and 21 and forms an air cushion behind the narrowest point between the cutting cylinders 2, 3. On the one hand, this prevents a leading edge of the web 5 from sticking to a cutting cylinder 2, 3. On the other hand, the web 5 is guided along the desired line between the conveyor belt lines 6, 7. If the web 5 consists of several layers, these are additionally held together. The suction air nozzles 22, 23 counteract a possible tearing of the air cushion in that a largely rectilinear air flow is forced from the grooves 18, 19 of the cutting cylinders 2, 3 to the deflection rollers 8, 9.

Claims (5)

  1. A cutting device for a folder in a printing press with two cutting cylinders (1, 2) for the web (5) supplied perpendicularly, and downstream transport belt guides (6, 7), which run over deflection rollers (8, 9) and guide the cut off products further between them, as well as with blast nozzles (10, 11) arranged on both sides of the incoming web (5) and directed into the gap between the web (5) and cutting cylinders (2, 3, 20) and with grooves (18, 19, 21) in the cutting cylinders (2, 3, 20) for blast air to pass through parallel to the web (5), characterised in that between the deflection rollers (8, 9) there are arranged suction nozzles (22, 23) for sucking the air passing through the grooves (18, 19, 21).
  2. A device according to claim 1, characterised in that the grooves (18, 19) are arranged extending in the circumferential direction of the cutting cylinders (2, 3).
  3. A cutting device according to claim 1, characterised in that the grooves (21) are arranged in a spiral form circulating about the cutting cylinders (20).
  4. A cutting device according to one of the preceding claims, characterised in that the blowing nozzles (10, 11) are arranged so that they can be adjusted for altering the blowing-out direction.
  5. A cutting device according to one of the preceding claims, characterised in that the volume of blast air and/or the volume of suction air are adjustable.
EP90110234A 1989-06-01 1990-05-30 Cutting device for a folder in a printing machine Expired - Lifetime EP0400596B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3917845A DE3917845A1 (en) 1989-06-01 1989-06-01 CUTTING DEVICE FOR A FOLDING MACHINE OF A PRINTING MACHINE
DE3917845 1989-06-01

Publications (3)

Publication Number Publication Date
EP0400596A2 EP0400596A2 (en) 1990-12-05
EP0400596A3 EP0400596A3 (en) 1991-06-05
EP0400596B1 true EP0400596B1 (en) 1994-05-18

Family

ID=6381826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90110234A Expired - Lifetime EP0400596B1 (en) 1989-06-01 1990-05-30 Cutting device for a folder in a printing machine

Country Status (4)

Country Link
US (1) US5036737A (en)
EP (1) EP0400596B1 (en)
JP (1) JPH0336164A (en)
DE (2) DE3917845A1 (en)

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US5533659A (en) * 1991-09-14 1996-07-09 Beloit Technologies, Inc. Dust removal system
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EP0788878B1 (en) * 1996-02-09 2000-05-17 Heidelberger Druckmaschinen Aktiengesellschaft Method and means for guiding a web between two cylinders of a printing machine
FR2751630B1 (en) * 1996-07-23 1998-10-23 Heidelberg Harris Sa DEVICE FOR GUIDING NOTEBOOKS AT THE OUTPUT OF A GROUP OF TWO CUTTING CYLINDERS OF A FOLDER
JP3043710B2 (en) 1997-08-04 2000-05-22 キヤノン株式会社 A support structure for supporting a panel, a panel device having a panel and a support structure for supporting the panel, and an image forming apparatus using the panel device
US5988030A (en) 1997-09-19 1999-11-23 Kimberly-Clark Worldwide, Inc. Apparatus for penetrating a sheet material web carried on a fabric
EP1125646B1 (en) 2000-02-01 2003-08-06 Heidelberger Druckmaschinen Aktiengesellschaft Means for removing particles from webs
DE10043211A1 (en) * 2000-09-01 2002-03-14 Heidelberger Druckmasch Ag Electrostatic charge applicator, used for multi-layer strip passing through printing machine, comprises roller surfaces and cutters electrically insulated
DE10048386A1 (en) * 2000-09-29 2002-04-11 Heidelberger Druckmasch Ag Copy-guide for printer folders includes copy guides at delivery adjusting in width and wider at belt entry than at outlet end for adaptable guiding.
DE10107368A1 (en) * 2001-02-16 2002-08-29 Heidelberger Druckmasch Ag Device for guiding flat copies in folders
US6840616B2 (en) * 2001-03-29 2005-01-11 Scott Summers Air folder adjuster apparatus and method
US6868785B2 (en) 2002-03-13 2005-03-22 Goss International Corporation De-Duster for a moving printing material web and cutting device, folder and printing press having the de-duster
DE10211309A1 (en) * 2002-03-13 2003-09-25 Heidelberger Druckmasch Ag Cutting device with dedusting device in the folder of a web-processing printing machine
DE202005021655U1 (en) * 2005-08-11 2009-04-09 Manroland Ag Cutting device for substrates in a printing press
US20070175346A1 (en) * 2006-02-02 2007-08-02 Goss International Americas, Inc. Reverse air flow web stabilizer
JP4800098B2 (en) * 2006-04-25 2011-10-26 ブリヂストンサイクル株式会社 Stand with stepped legs
JP2008007294A (en) * 2006-06-30 2008-01-17 Komori Corp Folder
JP2009234761A (en) * 2008-03-27 2009-10-15 Mitsubishi Heavy Ind Ltd Paper sheet discharge device
US20110240706A1 (en) * 2010-03-30 2011-10-06 Brian Christopher Schwamberger Web diverting apparatus
US9902083B2 (en) 2010-09-30 2018-02-27 The Procter & Gamble Company Absorbent article substrate trim material removal process and apparatus
US9248989B2 (en) 2013-09-03 2016-02-02 Eastman Kodak Company Positive pressure web wrinkle reduction system
US9120634B1 (en) 2014-02-26 2015-09-01 Eastman Kodak Company Media guiding system using bernoulli force roller
US9352923B2 (en) 2014-02-26 2016-05-31 Eastman Kodak Company Air shoe with roller providing lateral constraint
US9079736B1 (en) 2014-02-26 2015-07-14 Eastman Kodak Company Wrinkle reduction system using Bernoulli force rollers
CN105882117A (en) * 2016-04-11 2016-08-24 贵阳职业技术学院 Winding preventing structure capable of preventing paper from winding around cutting rollers in intaglio printing press production line
CN111347763A (en) * 2020-03-21 2020-06-30 长兴创智科技有限公司 Continuous color printing process for garment fabric

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Also Published As

Publication number Publication date
DE3917845C2 (en) 1992-11-05
EP0400596A2 (en) 1990-12-05
EP0400596A3 (en) 1991-06-05
DE3917845A1 (en) 1990-12-06
DE59005707D1 (en) 1994-06-23
US5036737A (en) 1991-08-06
JPH0336164A (en) 1991-02-15

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