EP2881350A1 - Longitudinal slitter blade tracking - Google Patents
Longitudinal slitter blade tracking Download PDFInfo
- Publication number
- EP2881350A1 EP2881350A1 EP14195328.1A EP14195328A EP2881350A1 EP 2881350 A1 EP2881350 A1 EP 2881350A1 EP 14195328 A EP14195328 A EP 14195328A EP 2881350 A1 EP2881350 A1 EP 2881350A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- printing
- printing material
- material web
- longitudinal cutting
- sensor
- 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.)
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Classifications
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- 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
- B41F13/56—Folding or cutting
- B41F13/58—Folding or cutting lengthwise
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
- B65H35/02—Delivering 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
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- 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
- B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D5/007—Control means comprising cameras, vision or image processing systems
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- 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
- B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D5/02—Means for moving the cutting member into its operative position for cutting
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- 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
- Y10T83/04—Processes
- Y10T83/0605—Cut advances across work surface
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- 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
- Y10T83/525—Operation controlled by detector means responsive to work
- Y10T83/533—With photo-electric work-sensing means
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- 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
- Y10T83/525—Operation controlled by detector means responsive to work
- Y10T83/538—Positioning of tool controlled
Definitions
- the invention relates to a longitudinal cutting device for longitudinal cutting of a printing material web in a printing machine, comprising a number of cutting blades, which are arranged transversely to the web running direction displaceable and a method for longitudinal cutting of such a printing material web.
- a plurality of print images are usually printed side by side on a corresponding width of substrate in a printing press.
- the printing material web is then separated by means of a longitudinal cutting device into a plurality of partial webs so as to be able to finish the final product in further processing steps.
- the cutting blades of the longitudinal cutting devices are positioned transversely to the web in accordance with the width of the partial webs and the width of the printing material web.
- a fixed arrangement of the cutting blade means that the longitudinal cutting device no longer along the desired cutting lines shares the substrate web. This regularly leads to waste paper or printed products of lesser quality.
- a longitudinal cutting device in which a number of cutting blades are simultaneously axially and immediately after one another axially adjustable to reduce set-up times and thus the spoilage.
- a user-dependent Intervention ie a so-called manually triggered reaction to changes in the substrate required.
- the invention is therefore based on the object of specifying a method for longitudinal cutting of a printing material web in a printing press and a longitudinal cutting device which can react as quickly and accurately as possible to changes in the printing material web.
- this object is achieved according to the invention by providing a measuring system which measures printing parameters of the printing substrate and a control unit for transferring the cutting blades are provided in a target position, wherein the control unit comprises an evaluation unit for determining the target position based on the measured printing parameters is designed.
- this object is achieved according to the invention by measuring printing parameters of the printing material web and transferring at least one of the cutting knives to a target position, the target position being determined on the basis of the measured printing-technical parameters.
- the invention is based on the consideration that an exact longitudinal section of a printing substrate even with changed printing parameters of the printing substrate, such as the width of the printing substrate, then can be performed when the cutting blades of the longitudinal cutting device are tracked.
- the new position of the cutting blade, the target position, the changed properties of the printing material web should be taken into account.
- These new properties are determined by means of a measuring system in the form of a determination of the printing parameters.
- the target value, ie the new positioning of the cutting blades, is then determined on the basis of the determined printing-technical parameters.
- Printing parameters may be, in particular, the position of position marks on the printing material web, but also the total width of the printing material web, if this is detected by sensors.
- the Printing parameters are derived via a change in the color register of the individual process colors.
- the measured printing-technical parameters are compared with nominal values. These setpoints can be stored in the system, for example in a separate database or a memory, entered manually, or even be measured by the measuring system itself.
- a difference value is determined from the actual value and the desired value, which describes the change in the printing material web for the measured printing-technical parameter, for example the shrinkage of the printing substrate web during the measurement of the width of the printing material web or individual known position marks.
- the target position of the cutting knife is then determined based on this difference value.
- a new target value for the positioning of a cutting blade is determined only when the difference value exceeds a limit value stored in a database or memory or determined on the basis of the actual and / or desired values.
- manufacturing tolerances can be specified, within which a change in the printing material triggers no adjustment of the cutting blade.
- the measuring system advantageously comprises a number of sensors.
- at least one sensor can be moved over the width of the printing material web.
- Such a sensor can be selectively positioned in the region of the printing material to be measured or determine printing parameters that depend on the position or extent of the printing material or individual parts or areas of it.
- At least two sensors are provided in a particularly advantageous embodiment, wherein a first sensor is arranged in the web running direction in front of a second sensor.
- the first sensor determines the output parameters of the printing material web, which can also be used as setpoints for the later calculation of the target position, and the second sensor, the current parameters of the printing material after passing through the printing press or through a portion of this.
- the first sensors are advantageously arranged in front of the printing units and the second sensors in the web running direction in front of the cutting blades.
- At least one sensor comprises a camera.
- changes in the printing material web can be detected, which relate to the position and extent of the printing material web, such as shrinkage or broadening, for example, by the so-called. Fan-out effect.
- the actual value or the nominal value of the web width before the printing units can also be used from the paper data assigned to the respective paper roll.
- the advantages achieved by the invention are in particular that by measuring the printing parameters of the printing substrate changes this can be determined directly and thus the cutting blades can be accurately positioned and readjusted. Thus, even with a shrinkage or broadening or another change in the printing substrate an exact longitudinal section and thus a high quality end product possible.
- the longitudinal cutting device 1 comprises by way of example two cutting blades 4a, 4b, which can be moved along a rail 6, transversely to the web running direction x over the entire width of the printing material 2 to the printing substrate 2 in three or at deactivated first or second cutting blade 4a, 4b to be able to cut two partial webs of desired widths.
- the longitudinal cutting device 1 comprises a measuring system 8, that two sensors 10a 10b.
- the first sensor 10a is arranged in a region in which the printing material web 2 is still substantially unchanged, ie usually in an area at the beginning of the production run, such as in the area of the roll changer or before the printing units.
- This first sensor 10a is designed as a camera and determined in the embodiment according to Fig. 1 the position of position marks 12 on the printing substrate 2.
- the thus determined original position of the position mark 12 is used as a setpoint in the subsequent calculation of the target position of the cutting blade.
- setpoint values can be stored or entered in a database (not shown) or in a memory (not shown).
- the second sensor 10b is arranged in the immediate vicinity of the cutting blades 4a, 4b or according to the units of the printing machine triggering the change in the printing material web 2.
- the second sensor 10b is also designed as a camera and determines the position of the position mark 12. The position thus determined is used as an actual value in the calculation of the target position.
- the longitudinal cutting device 1 comprises a control unit 14, the one Evaluation unit 16 includes.
- the actual value determined from the second sensor 10b is compared with a setpoint value provided by the database, by the memory, by an input unit or by the first sensor 10a.
- a difference value between the desired value and the actual value is determined, which describes the change in the printing material web, here the shrinkage.
- the target position of both cutting blades 4a, 4b is determined.
- the cutting blades are therefore repositioned according to the shrinkage factor.
- the evaluation unit 16 is additionally designed to carry out a limit value analysis. This means that a new target position and thus a tracking of the cutting blades 4a, 4b is determined only when the difference value of the setpoint and the actual value exceeds a stored or determined limit value. Thus manufacturing tolerances can be stored or dynamically determined on the basis of the measured printing parameters and / or on the basis of the current position of the cutting blades 4a, 4b within which a tracking of the cutting blades 4a, 4b is not performed.
- the measuring system 8 can be designed in alternative or additional embodiment to determine general printing parameters and changes in the printing material web 2, which is a tracking of the cutting blade 4a, 4b require.
Abstract
Ein Verfahren und eine Vorrichtung zum Längsschneiden einer Bedruckstoffbahn in einer Druckmaschine mittels einer Längsschneidevorrichtung, umfassend eine Anzahl von Schneidmessern, die quer zur Bahnlaufrichtung verschiebbar angeordnet sind, soll möglichst schnell und exakt auf Veränderungen der Bedruckstoffbahn reagieren können. Dazu werden drucktechnische Parameter der Bedruckstoffbahn gemessen und mindestens eines der Schneidmesser in eine Zielposition überführt, wobei die Zielposition auf Basis der gemessenen drucktechnischen Parameter bestimmt wird.A method and a device for longitudinal cutting of a printing material web in a printing machine by means of a longitudinal cutting device, comprising a number of cutting blades, which are arranged transversely to the web running direction, should be able to react as quickly and accurately as possible to changes in the printing material. For this purpose, printing-technical parameters of the printing material web are measured and at least one of the cutting knives is transferred to a target position, wherein the target position is determined on the basis of the measured printing-technical parameters.
Description
Die Erfindung bezieht sich auf eine Längsschneidevorrichtung zum Längsschneiden einer Bedruckstoffbahn in einer Druckmaschine, umfassend eine Anzahl von Schneidmessern, die quer zur Bahnlaufrichtung verschiebbar angeordnet sind und ein Verfahren zum Längsschneiden einer solchen Bedruckstoffbahn.The invention relates to a longitudinal cutting device for longitudinal cutting of a printing material web in a printing machine, comprising a number of cutting blades, which are arranged transversely to the web running direction displaceable and a method for longitudinal cutting of such a printing material web.
Zur Reduzierung von Fertigungszeiten werden in einer Druckmaschine üblicherweise mehrere Druckbilder nebeneinander auf eine entsprechend Breite Bedruckstoffbahn gedruckt. Die Bedruckstoffbahn wird anschließend mittels einer Längsschneideeinrichtung in mehrere Teilbahnen getrennt, um so in weiteren Bearbeitungsschritten das Endprodukt fertigstellen zu können. Die Schneidmesser der Längsschneideeinrichtungen werden dabei entsprechend der Breite des Teilbahnen und der Breite der Bedruckstoffbahn quer zu Bahn positioniert.To reduce production times, a plurality of print images are usually printed side by side on a corresponding width of substrate in a printing press. The printing material web is then separated by means of a longitudinal cutting device into a plurality of partial webs so as to be able to finish the final product in further processing steps. The cutting blades of the longitudinal cutting devices are positioned transversely to the web in accordance with the width of the partial webs and the width of the printing material web.
Nicht nur bei einem Wechsel des Druckproduktes, sondern auch bei einer Veränderung der Bedruckstoffbahn innerhalb der Druckmaschine, beispielsweise einer Schrumpfung, Ausdehnung oder Verschiebung im Laufe der vorgelagerten Bearbeitungschritte, führt eine feste Anordnung der Schneidmesser allerdings dazu, dass die Längschneideeinrichtung nicht mehr entlang der gewünschten Schnittlinien die Bedruckstoffbahn teilt. Dies führt regelmäßig zu Makulatur oder Druckprodukten geringerer Qualität.Not only with a change of the printed product, but also with a change in the printing material within the printing press, such as shrinkage, expansion or displacement in the course of the upstream processing steps, a fixed arrangement of the cutting blade, however, means that the longitudinal cutting device no longer along the desired cutting lines shares the substrate web. This regularly leads to waste paper or printed products of lesser quality.
Aus der
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren zum Längsschneiden einer Bedruckstoffbahn in einer Druckmaschine und eine Längsschneidevorrichtung anzugeben, die möglichst schnell und exakt auf Veränderungen der Bedruckstoffbahn reagieren können.The invention is therefore based on the object of specifying a method for longitudinal cutting of a printing material web in a printing press and a longitudinal cutting device which can react as quickly and accurately as possible to changes in the printing material web.
Bezüglich der Längsschneidevorrichtung wird diese Aufgabe erfindungsgemäß gelöst, indem ein Messsystem, das drucktechnische Parameter der Bedruckstoffbahn misst und eine Regeleinheit zur Überführung der Schneidmesser in eine Zielposition vorgesehen sind, wobei die Regeleinheit eine Auswerteeinheit umfasst, die zur Bestimmung der Zielposition auf Basis der gemessenen drucktechnischen Parameter ausgelegt ist. Bezüglich des Verfahrens wird diese Aufgabe erfindungsgemäß gelöst, indem drucktechnische Parameter der Bedruckstoffbahn gemessen werden und mindestens eines der Schneidmesser in eine Zielposition überführt wird, wobei die Zielposition auf Basis der gemessenen drucktechnischen Parameter bestimmt wird.With regard to the longitudinal cutting device, this object is achieved according to the invention by providing a measuring system which measures printing parameters of the printing substrate and a control unit for transferring the cutting blades are provided in a target position, wherein the control unit comprises an evaluation unit for determining the target position based on the measured printing parameters is designed. With regard to the method, this object is achieved according to the invention by measuring printing parameters of the printing material web and transferring at least one of the cutting knives to a target position, the target position being determined on the basis of the measured printing-technical parameters.
Die Erfindung geht dabei von der Überlegung aus, dass ein exakter Längsschnitt einer Bedruckstoffbahn auch bei veränderten drucktechnischen Parametern der Bedruckstoffbahn, wie beispielsweise der Breite der Bedruckstoffbahn, dann ausgeführt werden kann, wenn die Schneidmesser der Längsschneidvorrichtung nachgeführt werden. Bei der Bestimmung der neuen Position der Schneidmesser, der Zielposition, sollten dabei die veränderten Eigenschaften der Bedruckstoffbahn berücksichtigt werden. Diese neuen Eigenschaften werden dabei mittels eines Messystems in Form von einer Bestimmung der drucktechnischen Parameter ermittelt. Der Zielwert, also die neue Positionierung der Schneidmesser wird dann auf Basis der ermittelten drucktechnischen Parameter bestimmt.The invention is based on the consideration that an exact longitudinal section of a printing substrate even with changed printing parameters of the printing substrate, such as the width of the printing substrate, then can be performed when the cutting blades of the longitudinal cutting device are tracked. When determining the new position of the cutting blade, the target position, the changed properties of the printing material web should be taken into account. These new properties are determined by means of a measuring system in the form of a determination of the printing parameters. The target value, ie the new positioning of the cutting blades, is then determined on the basis of the determined printing-technical parameters.
Drucktechnische Parameter können dabei insbesondere die Position von Positionsmarken auf der Bedruckstoffbahn sein, aber auch die Gesamtbreite der Bedruckstoffbahn, sofern diese durch Sensoren erfasst wird. Alternativ kann der drucktechnische Parameter auch über eine Veränderung des Farbregisters der einzelnen Prozessfarben abgeleitet werden.Printing parameters may be, in particular, the position of position marks on the printing material web, but also the total width of the printing material web, if this is detected by sensors. Alternatively, the Printing parameters are derived via a change in the color register of the individual process colors.
Um die Veränderung der Bedruckstoffbahn ermitteln zu können, werden in bevorzugter Ausführung die gemessenen drucktechnischen Parameter, die Istwerte, mit Sollwerten verglichen. Diese Sollwerte können dabei im System, beispielsweise in einer eigenen Datenbank oder einem Speicher, hinterlegt sein, manuell eingegeben werden oder aber auch durch das Messsystem selbst gemessen werden. Aus dem Istwert und dem Sollwert wird dabei ein Differenzwert bestimmt, der die Veränderung der Bedruckstoffbahn für den gemessenen drucktechnischen Parameter, beispielsweise die Schrumpfung der Bedruckstoffbahn bei der Messung der Breite der Bedruckstoffbahn oder einzelner bekannter Positionsmarken, beschreibt. Die Zielposition des Schneidemessers wird dann auf Basis dieses Differenzwertes bestimmt.In order to be able to determine the change in the printing material web, in a preferred embodiment, the measured printing-technical parameters, the actual values, are compared with nominal values. These setpoints can be stored in the system, for example in a separate database or a memory, entered manually, or even be measured by the measuring system itself. In this case, a difference value is determined from the actual value and the desired value, which describes the change in the printing material web for the measured printing-technical parameter, for example the shrinkage of the printing substrate web during the measurement of the width of the printing material web or individual known position marks. The target position of the cutting knife is then determined based on this difference value.
In besonders bevorzugter Ausführung wird ein neuer Zielwert für die Positionierung eines Schneidmessers erst dann bestimmt, wenn der Differenzwert einen in einer Datenbank oder einem Speicher hinterlegten oder auf Basis der Ist-und/oder Sollwerte ermittelten Grenzwert überschreitet. Somit können Fertigungstoleranzen vorgegeben werden, innerhalb derer eine Veränderung der Bedruckstoffbahn keine Nachstellung der Schneidmesser auslöst.In a particularly preferred embodiment, a new target value for the positioning of a cutting blade is determined only when the difference value exceeds a limit value stored in a database or memory or determined on the basis of the actual and / or desired values. Thus, manufacturing tolerances can be specified, within which a change in the printing material triggers no adjustment of the cutting blade.
Zur Bestimmung der drucktechnischen Parameter umfasst das Messsystem in vorteilhafter Ausführung eine Anzahl von Sensoren. Dabei ist in besonders bevorzugter Ausgestaltung zumindest ein Sensor über die Breite der Bedruckstoffbahn verfahrbar. Ein derartiger Sensor kann gezielt in dem zu messenden Bereich der Bedruckstoffbahn positioniert werden oder aber drucktechnische Parameter bestimmen, die von der Position oder Ausdehnung der Bedruckstoffbahn oder einzelner Teile bzw. Bereiche von ihr abhängen. Alternativ kann auch eine Anzahl von Sensoren entweder über die gesamte Bahnbreite oder über Bereiche der Bahn, insbesondere mindestens einem Randbereich der Bahn eingesetzt werden, um so beispielsweise die Bahnbreite der Bedruckstoffbahn direkt zu erfassen.To determine the printing parameters, the measuring system advantageously comprises a number of sensors. In a particularly preferred embodiment, at least one sensor can be moved over the width of the printing material web. Such a sensor can be selectively positioned in the region of the printing material to be measured or determine printing parameters that depend on the position or extent of the printing material or individual parts or areas of it. Alternatively, it is also possible to use a number of sensors either over the entire web width or over regions of the web, in particular at least one edge region of the web, so as to detect directly, for example, the web width of the printing substrate web.
Um die Veränderung der Eigenschaften der Bedruckstoffbahn möglichst genau bestimmen zu können, sind in besonders vorteilhafter Ausgestaltung mindestens zwei Sensoren vorgesehen, wobei ein erster Sensor in Bahnlaufrichtung vor einem zweiten Sensor angeordnet ist. Dabei bestimmt der erste Sensor die Ausgangsparameter der Bedruckstoffbahn, die auch als Sollwerte für die spätere Berechnung der Zielposition verwendet werden können, und der zweite Sensor die aktuellen Parameter der Bedruckstoffbahn nach dem Durchlauf durch die Druckmaschine oder durch einen Teilbereich dieser. Zu diesem Zweck sind die ersten Sensoren vorteilhaft vor den Druckeinheiten angeordnet und die zweiten Sensoren in Bahnlaufrichtung vor den Schneidmessern.In order to determine the change in the properties of the printing material as accurately as possible, at least two sensors are provided in a particularly advantageous embodiment, wherein a first sensor is arranged in the web running direction in front of a second sensor. In this case, the first sensor determines the output parameters of the printing material web, which can also be used as setpoints for the later calculation of the target position, and the second sensor, the current parameters of the printing material after passing through the printing press or through a portion of this. For this purpose, the first sensors are advantageously arranged in front of the printing units and the second sensors in the web running direction in front of the cutting blades.
Zur Bestimmung der Position von Positionsmarken auf der Bedruckstoffbahn oder aber allgemeinen optisch erfassbaren drucktechnischen Parametern, umfasst in vorteilhafter Ausführung zumindest ein Sensor eine Kamera. Dadurch können insbesondere Veränderungen der Bedruckstoffbahn erfasst werden, die sich auf die Position und Ausdehnung der Bedruckstoffbahn, wie beispielsweise der Schrumpfung oder Verbreiterung, beispielsweise durch den sog. Fan-Out-Effekt, beziehen. Alternativ kann auch der Istwert bzw. der Nennwert der Bahnbreite vor den Druckeinheiten aus den der jeweiligen Papierrolle zugewiesenen Papierdaten verwendet werden.In order to determine the position of position marks on the printing material web or else generally optically detectable printing-technical parameters, in an advantageous embodiment at least one sensor comprises a camera. As a result, in particular changes in the printing material web can be detected, which relate to the position and extent of the printing material web, such as shrinkage or broadening, for example, by the so-called. Fan-out effect. Alternatively, the actual value or the nominal value of the web width before the printing units can also be used from the paper data assigned to the respective paper roll.
Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, dass durch die Messung der drucktechnischen Parameter der Bedruckstoffbahn Veränderungen dieser direkt ermittelt werden können und somit die Schneidmesser genau positioniert und nachgestellt werden können. Somit ist auch bei einer Schrumpfung oder Verbreiterung oder einer anderen Veränderung der Bedruckstoffbahn ein exakter Längschnitt und somit ein hochwertiges Endprodukt möglich.The advantages achieved by the invention are in particular that by measuring the printing parameters of the printing substrate changes this can be determined directly and thus the cutting blades can be accurately positioned and readjusted. Thus, even with a shrinkage or broadening or another change in the printing substrate an exact longitudinal section and thus a high quality end product possible.
Ein Ausführungsbeispiel der Erfindung wird anhand einer Zeichnung näher erläutert.An embodiment of the invention will be explained in more detail with reference to a drawing.
Darin zeigt die
Damit die gewünschten Breiten oder Breitenverhältnisse der Teilbahnen auch nach einer Veränderung der Bedruckstoffbahn 2, beispielsweise durch eine Schrumpfung oder Verbreiterung der Bedruckstoffbahn 2 nach Durchlauf der Druckwerke oder anderer Teilbereiche der Druckmaschine eingehalten werden können, umfasst die Längsschneidevorrichtung 1 ein Messsystem 8, dass zwei Sensoren 10a, 10b umfasst. Der erste Sensor 10a ist dabei in einem Bereich angeordnet, in dem die Bedruckstoffbahn 2 noch im Wesentlichen unverändert ist, also üblicherweise in einem Bereich am Anfang des Produktionslaufes, wie beispielsweise im Bereich des Rollenwechslers oder vor den Druckeinheiten. Dieser erster Sensor 10a ist als Kamera ausgebildet und bestimmt im Ausführungsbeispiel nach
Für die Positionierung der Schneidmesser 4a, 4b bzw. für die Nachstellung der Schneidmesser 4a, 4b aufgrund von Veränderungen der Bedruckstoffbahn, umfasst die Längsschneidevorrichtung 1 eine Regeleinheit 14, die eine Auswerteinheit 16 umfasst. In dieser Auswerteeinheit 16 wird der aus dem zweiten Sensor 10b ermittelte Istwert mit einem von der Datenbank, vom Speicher, von einer Eingabeeinheit oder von dem ersten Sensor 10a bereitgestellten Sollwert verglichen. Dabei wird ein Differenzwert zwischen dem Sollwert und dem Istwert bestimmt, der die Veränderung der Bedruckstoffbahn, hier der Schrumpfung, beschreibt. Auf Basis dieses Differenzwertes wird die Zielposition beider Schneidmesser 4a, 4b bestimmt. Im Falle der dargestellten Schrumpfung der Bedruckstoffbahn 2, werden die Schneidmesser daher entsprechend dem Schrumpffaktor neu positioniert. Die Auswerteeinheit 16 ist dabei zusätzlich dazu ausgelegt eine Grenzwertbetrachtung durchzuführen. Das bedeutet, dass eine neue Zielposition und somit eine Nachführung der Schneidmesser 4a, 4b erst dann bestimmt wird, wenn der Differenzwert des Sollwertes und des Istwertes einen hinterlegten oder ermittelten Grenzwert überschreitet. So können Fertigungstoleranzen hinterlegt oder dynamisch auf Basis der gemessenen drucktechnischen Parameter und/oder auf Basis der aktuellen Position der Schneidmesser 4a, 4b bestimmt werden, innerhalb derer eine Nachführung der Schneidmesser 4a, 4b nicht vorgenommen wird.For the positioning of the
Auch wenn das Ausführungsbeispiel beispielhaft auf die Bestimmung von Positionsmarken 12 und die Schrumpfung der Bedruckstoffbahn 2 ausgelegt ist, kann das Messsystem 8 in alternativer oder zusätzlicher Ausgestaltung dazu ausgelegt sein allgemeine drucktechnische Parameter und Veränderungen der Bedruckstoffbahn 2 zu bestimmen, die eine Nachführung der Schneidmesser 4a, 4b erfordern.Although the exemplary embodiment is designed for the determination of
- 11
- LängsschneideeinrichtungSlitter
- 22
- Bedruckstoffbahnprinting material
- 4a4a
- erstes Schneidmesserfirst cutting knife
- 4b4b
- zweites Schneidmessersecond cutting knife
- 66
- Schienerail
- 88th
- Messsystemmeasuring system
- 10a10a
- erster Sensorfirst sensor
- 10b10b
- zweiter Sensorsecond sensor
- 1212
- Positionsmarkebookmark
- 1414
- Regeleinheitcontrol unit
- 1616
- Auswerteeinheitevaluation
- xx
- BahnlaufrichtungWeb direction
Claims (12)
dadurch gekennzeichnet, dass
drucktechnische Parameter der Bedruckstoffbahn gemessen werden und mindestens eines der Schneidmesser in eine Zielposition überführt wird, wobei die Zielposition auf Basis der gemessenen drucktechnischen Parameter bestimmt wird.Method for longitudinal cutting of a printing material web in a printing press by means of a longitudinal cutting device, comprising a number of cutting blades, which are arranged so as to be displaceable transversely to the web running direction,
characterized in that
printing parameters of the printing material web are measured and at least one of the cutting blade is transferred to a target position, wherein the target position is determined on the basis of the measured printing parameters.
dadurch gekennzeichnet, dass
ein Messsystem, das drucktechnische Parameter der Bedruckstoffbahn misst und eine Regeleinheit zur Überführung der Schneidmesser in eine Zielposition vorgesehen sind, wobei die Regeleinheit eine Auswerteeinheit umfasst, die zur Bestimmung der Zielposition auf Basis der gemessenen drucktechnischen Parameter ausgelegt ist.Longitudinal cutting device for longitudinal cutting of a printing material web in a printing machine, comprising a number of cutting blades, which are arranged transversely to the web running direction,
characterized in that
a measuring system which measures printing parameters of the printing material web and a control unit for transferring the cutting blades are provided in a target position, wherein the control unit comprises an evaluation, which is designed to determine the target position based on the measured printing parameters.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013113421.1A DE102013113421A1 (en) | 2013-12-04 | 2013-12-04 | Längsschnittmessernachführung |
Publications (1)
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EP2881350A1 true EP2881350A1 (en) | 2015-06-10 |
Family
ID=52015865
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14195328.1A Withdrawn EP2881350A1 (en) | 2013-12-04 | 2014-11-28 | Longitudinal slitter blade tracking |
Country Status (4)
Country | Link |
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US (1) | US20150151533A1 (en) |
EP (1) | EP2881350A1 (en) |
CN (1) | CN104691091A (en) |
DE (1) | DE102013113421A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105729987A (en) * | 2016-02-05 | 2016-07-06 | 陈益币 | Tracking and transverse-cutting method of web-fed printing special edition positioning and transverse-cutting machine with upper and lower cutters |
CN113662233A (en) * | 2021-09-14 | 2021-11-19 | 朱玉钟 | Leaf and stem separation equipment and separation method thereof |
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2013
- 2013-12-04 DE DE102013113421.1A patent/DE102013113421A1/en not_active Ceased
-
2014
- 2014-11-28 EP EP14195328.1A patent/EP2881350A1/en not_active Withdrawn
- 2014-12-03 CN CN201410721534.3A patent/CN104691091A/en active Pending
- 2014-12-03 US US14/559,650 patent/US20150151533A1/en not_active Abandoned
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DE60211376T2 (en) * | 2001-10-29 | 2007-06-06 | Lasermax Roll Systems Ab | METHOD AND DEVICE FOR RUNNING TRACKS PRINTED IN A HIGH-SPEED PRINTER |
EP1415944A1 (en) | 2002-10-30 | 2004-05-06 | MAN Roland Druckmaschinen AG | Apparatus for the adjustment of pressing rollers and/or cutting blades in folding machines |
DE10313774A1 (en) * | 2002-12-18 | 2004-07-15 | Koenig & Bauer Ag | Devices for processing a moving material web |
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Also Published As
Publication number | Publication date |
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DE102013113421A1 (en) | 2015-06-11 |
US20150151533A1 (en) | 2015-06-04 |
CN104691091A (en) | 2015-06-10 |
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