EP1952956A1 - Device for cutting printed products fed in an overlapping formation - Google Patents

Device for cutting printed products fed in an overlapping formation Download PDF

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Publication number
EP1952956A1
EP1952956A1 EP20070405027 EP07405027A EP1952956A1 EP 1952956 A1 EP1952956 A1 EP 1952956A1 EP 20070405027 EP20070405027 EP 20070405027 EP 07405027 A EP07405027 A EP 07405027A EP 1952956 A1 EP1952956 A1 EP 1952956A1
Authority
EP
European Patent Office
Prior art keywords
speed
cutting
blade
thickness
transport
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.)
Withdrawn
Application number
EP20070405027
Other languages
German (de)
French (fr)
Inventor
Stefan Liebheit
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.)
Mueller Martini Holding AG
Original Assignee
Mueller Martini Holding 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 Mueller Martini Holding AG filed Critical Mueller Martini Holding AG
Priority to EP20070405027 priority Critical patent/EP1952956A1/en
Priority to US12/068,079 priority patent/US8011280B2/en
Priority to JP2008023400A priority patent/JP2008188765A/en
Priority to CN2008100089931A priority patent/CN101234491B/en
Publication of EP1952956A1 publication Critical patent/EP1952956A1/en
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/66—Advancing articles in overlapping streams
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/24—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter coacting with another disc cutter
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/0033—Cutting members therefor assembled from multiple blades
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/0046—Cutting members therefor rotating continuously about an axis perpendicular to the edge
    • 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
    • B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed
    • B26D5/30—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier
    • B26D5/32—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier with the record carrier formed by the work itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/515—Cutting handled material
    • B65H2301/5155—Cutting handled material longitudinally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/13—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • B65H2513/11—Speed angular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/21—Industrial-size printers, e.g. rotary printing press
    • 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
    • Y10T83/141—With means to monitor and control operation [e.g., self-regulating means]
    • Y10T83/145—Including means to monitor product
    • 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
    • Y10T83/141—With means to monitor and control operation [e.g., self-regulating means]
    • Y10T83/148—Including means to correct the sensed operation
    • 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
    • Y10T83/141—With means to monitor and control operation [e.g., self-regulating means]
    • Y10T83/159—Including means to compensate tool speed for work-feed variations
    • 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
    • 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
    • Y10T83/6475—With means to regulate work-feed speed
    • 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
    • Y10T83/768—Rotatable disc tool pair or tool and carrier
    • Y10T83/7793—Means to rotate or oscillate tool
    • Y10T83/7797—Including means to rotate both elements of tool pair
    • Y10T83/7805—And means to change speed of rotation
    • 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
    • Y10T83/768—Rotatable disc tool pair or tool and carrier
    • Y10T83/7809—Tool pair comprises rotatable tools
    • Y10T83/783—Tool pair comprises contacting overlapped discs

Definitions

  • the invention relates to a device for cutting an imbricated flow formed from printed products, consisting of an oppositely rotating upper blade cooperating with a rotating lower blade, between which the imbricated flow is passed by means of transport device, wherein at least one of the knives is formed with a plurality of circumferentially spaced cutting edges, and a control device for controlling the drive of the blades.
  • the invention has for its object to provide a rotary cutting machine of the type mentioned, in which wear the cutting less quickly, so that a longer life is achievable.
  • the object is achieved in a generic rotary cutting machine characterized in that the speed of at least one of the two blades is determined by a speed of transport of the transport device and the thickness of the scale flow through the control device.
  • the invention is based on the finding that in such rotary cutting machines often only with the tip of the cutting is cut. As a result, the cutting edges are used much faster in each case in a small subarea than when the cutting edges are used optimally. With such optimal use, the cutting edge is utilized to about 70%. However, this is usually the case only when cutting at maximum thickness of the product stream and at maximum speed. However, with very thin products or low transport speeds, the blades only engage the tip, causing the aforementioned very rapid wear.
  • the peripheral speed of at least one blade is always optimally adapted to the products to be cut, even with changing properties.
  • the properties of the product stream which are particularly and preferably used here are the thickness of the product stream and the transport speed. However, it is also possible to use other control properties, for example the type of material and in particular the paper type of the products.
  • At least one of the knives is driven by a speed-controlled motor. This allows a particularly simple and accurate control of the rotational speed of the corresponding blade.
  • both blades are each driven by a speed-controlled motor.
  • the two knives can then be adjusted independently and comparatively easily to the properties of the product stream and / or the products to be controlled. Thus, the life of both knives can be extended even further.
  • the force to be applied to the driven blade shaft is measured and that the measurement result is used to check the cutting condition. This can be ensured that the cutting edges are reground or replaced at the optimum time. In addition, an insufficient cut quality due to worn cutting edges can be avoided.
  • the preferred properties for controlling the at least one blade are the thickness of the product stream and the transport speed.
  • the wear of the cutting can be further reduced.
  • the material property of the products for example the type of paper, is used in particular as the third property.
  • the thickness of the products or of the product stream is used to control the at least one knife, this is done according to an embodiment of the invention with measuring means, for example a sensor which determines the thickness of the product stream and feeds it to the corresponding control device or regulating device.
  • the transport speed can also be determined with suitable measuring means, but in principle it is also possible to take over the speed directly from the transport device, for example a conveyor belt.
  • rotary cutting machine 1 is used to cut a stream of products, especially printed matter such as newspapers, magazines, folded sheets or single sheets.
  • the products 13 are conveyed in particular in a scale flow 12.
  • the products 13 come, for example, from a rotary printing press not shown here and are according to FIG. 2 transported by a transport device 11 in the direction of the arrow 14.
  • the transport device 11 may be formed in a known manner and, for example, be a belt conveyor.
  • the speed of the transport device 11 is usually constant and is given by the upstream machines, in particular, for example, the printing press.
  • the speed of the transport device 11 can be very different and thus comparatively slow or very fast, depending on the product 13.
  • the speed can be, for example, up to 1.2 m / s.
  • the products 13 are cut in the longitudinal direction of the scale flow 12, with an unspecified edge of the products 13 being separated off.
  • the rotary cutting machine 1 has a machine frame 2, on which an upper blade 4 and a lower blade 5 are rotatably mounted.
  • the knife 4 has a knife shaft, not shown here and known per se, which is mounted in the machine frame 2 is. This blade shaft is parallel to a blade shaft of the lower blade 5, which is also mounted in the machine frame 2.
  • the knife shaft of the lower blade 5 may be displaceable in the longitudinal direction for adjusting the cutting gap between the upper blade 4 and the lower blade 5, as shown in the EP 1 637 295 A is disclosed.
  • the upper blade 4 is a so-called segment blade and has a plate 7 as a carrier, which is fastened with a flange 28 on the blade shaft not visible here.
  • a plate 7 as a carrier, which is fastened with a flange 28 on the blade shaft not visible here.
  • Such cutting 6 are also referred to as pawls. They each have according to FIG. 2 a cutting edge 16 with which the products 13 are cut. These cutting edges 16 must be ground periodically, as for example in the EP 1 510 288 A is described.
  • the cutting edges 16 each extend between a tip 18 and a corner 20.
  • the upper blade 4 is driven by a motor M, which acts on a merely indicated here transmission 3 on the blade shaft of the upper blade 4.
  • the upper blade 4 is driven in the direction of the arrow 9.
  • the motor M is in particular an electric motor and in particular a speed-controlled servomotor.
  • the lower blade 5 has a ring 8 which is mounted on a disc-shaped support 29.
  • the ring 8 consists in particular of hard metal and is glued, for example, on the support 29. He has an inside, not shown here, which is nachschleifbar. Between this inside and the blades 6 there is a kerf in the range of, for example 0.03 mm to 0.035 mm.
  • the lower blade 5 is driven in the direction of the arrow 10. This drive can be passive, the speed of the lower blade 5 automatically adapts to the speed of the upper blade 4.
  • the lower blade 5 can also be actively driven by the engine M via a gear not shown here.
  • the lower blade 5 can also be driven by its own motor M ', which acts on the blade shaft of the lower blade 5 in a gear, not shown here.
  • motor M ' is preferably also an electric motor and in particular a speed-controlled servo motor.
  • the O-beater 4 and the segment knife above and the lower blade 5 below is the O-beater 4 and the segment knife above and the lower blade 5 below. It is also conceivable, however, a design in which the lower blade 5 is formed as a segment blade and the scale flow 12 is thus cut from below. The shingled stream 12 is then correspondingly formed so that the edges of the products 13 are below.
  • thickness H of the scale flow 12 may be very different depending on the products 13 and the arrangement of the products of the scale flow.
  • This thickness H is before the cutting process with the in FIG. 3 indicated sensor 24 or other suitable measuring device determined.
  • the sensor 24 is for example a non-contact distance measuring device according to FIG. 3 in the direction of the arrow 21, or also, for example, a mechanical sensing device.
  • the measured thickness H is supplied to a control device S, which is connected to a speed controller 25 of the motor M. Is the lower blade 5 with the motor M ' driven, so also a control signal to a speed controller 26 of the motor M 'is supplied. Except the thickness H is with another sensor 23 in FIG. 3 determined by the arrow 22 speed of the scale flow 12 indicated.
  • the sensor 23 may be non-contact or a known mechanical speedometer. Measuring the velocity of scale flows is well known to those skilled in the art.
  • the sensor 23 may also be integrated in the transport device 11.
  • the measured speed is also supplied to the control device S, which supplies the corresponding signals to the speed controller 25 and possibly also to the speed controller 26.
  • the speed of the upper blade 4 is predetermined by the controller S.
  • the calculation of this speed is such that the cutting edge 16 is used optimally for the cutting process.
  • Optimum use is when the in FIG. 2 shown area 17, for example, about 70% of the total length of the cutting edge 16 is.
  • the region 17 starts from the tip 18 and extends to the in FIG. 2 impingement point P.
  • This impingement point P is the point at which the cutting edge 16 strikes the product 13 to be cut.
  • the blades 6 are thus used in the area 17 and thus blurred in this area with time.
  • the region 17 may also be slightly less than 70%, for example 60% or 50% of the length of the cutting edge 16.
  • the cutting edge 16 preferably extends straight between the tip 18 and the corner 20, but it is also conceivable odd course.
  • the speed of the lower blade 5 can also be calculated by the controller S on the basis of a property and in particular the thickness H and / or the speed of the scale flow 12.
  • the regulation of the two motors M and M ' is preferably independent of each other.
  • the rotational speeds of the two blades 4 and 5 can then be optimally controlled with respect to the thickness and / or the transport speed of the scale flow 12.
  • a control is possible solely on the basis of the transport speed or the thickness H.
  • both sizes are taken into account.
  • the regulation is of course only due to the thickness H. With constant thickness H and different transport speed, the regulation then takes place correspondingly on the basis of the transport speed.
  • the cutting edges 6 optimally meet in the plane of an upper side 27, as explained above. Fig. 2 ) on the products 13 on.
  • a cutting curve 19 is formed, which is formed by the cutting edges 16 in the region 17.
  • the cutting edges 16 move according to FIG. 2 in the direction of arrow 15 and the products 13 in the direction of arrow 14.
  • the FIG. 2 shows a cutting edge 6 in the position in which it impinges on the product 13 and a cutting edge 6 ', which just leaves the product 13 after the cutting process.
  • the speed of the products 13 and / or the thickness H changes, then the speed of the upper blade 4 and possibly also the rotational speed of the lower blade 5 are correspondingly changed on the basis of the aforementioned regulation of the control device S.
  • the peripheral speed of the upper blade 4 is decisive, which is directly dependent on the speed here.
  • the force to be applied to the blade shafts or at least on a blade shaft can be considered.
  • This force can be measured for example via the current consumption of the motors M and M 'of the speed controllers 25 and 26 and fed to the evaluation of the control device S. So conclusions about the state of the cutting edges 6 and the cutting edges 16 and the ring 8 can be made. With a corresponding indication can be ensured that the blades 6 and the carbide ring 8 are reground or replaced in a timely manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Details Of Cutting Devices (AREA)
  • Control Of Cutting Processes (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Nonmetal Cutting Devices (AREA)

Abstract

The machine (1) has rotary upper and lower cutters (4, 5) through which a shingled stream (12) of print products is guided by a conveying device e.g. belt. One of the cutters has cutting edges, which are arranged in a circumference in a distributed manner. A control device (S) controls driving of the cutters. The control device determines or control rotational speed of the cutters based on a conveying speed of the conveying device and a thickness of the shingled stream. The cutters are driven by motors (M, M').

Description

Die Erfindung betrifft eine Vorrichtung zum Schneiden eines aus Druckprodukten gebildeten Schuppenstroms, bestehend aus einem mit einem rotierenden Untermesser zusammenwirkenden, entgegengesetzt rotierenden Obermesser, zwischen denen der Schuppenstrom mittels Transportvorrichtung hindurchgeführt wird, wobei wenigstens eines der Messer mit mehreren am Umfang verteilt angeordneten Schneiden ausgebildet ist, und mit einer Steuervorrichtung zum Steuern des Antriebs der Messer.The invention relates to a device for cutting an imbricated flow formed from printed products, consisting of an oppositely rotating upper blade cooperating with a rotating lower blade, between which the imbricated flow is passed by means of transport device, wherein at least one of the knives is formed with a plurality of circumferentially spaced cutting edges, and a control device for controlling the drive of the blades.

In US - A - 3 813 981 ist eine Rotationsschneidmaschine dieser Art beschrieben.
Durch die Geometrie der am Umfang eines der beiden rotierenden Messers verteilten Schneiden kann verhindert werden, dass sich die Druckprodukte während dem Schneidvorgang verschieben. Die Umfangsgeschwindigkeit des Messers mit den Schneiden muss dabei genau auf die Transportgeschwindigkeit der Fördereinrichtung der Druckprodukte abgestimmt sein. Um auch dicke Druckprodukte im Schuppenstrom mit hoher Produktionsleistung und guter Schnittqualität verarbeiten zu können, werden die Messer von Rotationsschneidmaschinen wie in EP - A - 1 510 288 gezeigt, ausgebildet. Auftretender Verschleiss der Messer beeinträchtigt die Schnittqualität, weshalb die Schneiden regelmässig hochgeschliffen werden müssen. Das Nachschleifen ist vergleichsweise aufwändig und teuer. Der Austausch von einem oder mehreren Messern verursacht eine Stillstandszeit von beispielsweise 10 bis 30 Minuten.In US Pat. No. 3,813,981 a rotary cutting machine of this type is described.
Due to the geometry of the cutting edges distributed on the circumference of one of the two rotating knives, it is possible to prevent the printed products from shifting during the cutting process. The peripheral speed of the knife with the cutting must be tuned exactly to the transport speed of the conveyor of the printed products. In order also thick printed products in the shingled stream with high production achievement and To be able to process good cutting quality, the knives are used by rotary cutting machines as in EP-A-1 510 288 shown, trained. Occurring wear of the blades affects the quality of cut, which is why the blades must be sharpened regularly. Regrinding is comparatively complicated and expensive. The replacement of one or more knives causes a downtime of, for example, 10 to 30 minutes.

Der Erfindung liegt die Aufgabe zugrunde, eine Rotationsschneidmaschine der genannten Art zu schaffen, bei welcher sich die Schneiden weniger schnell abnützen, so dass eine längere Standzeit erreichbar ist.The invention has for its object to provide a rotary cutting machine of the type mentioned, in which wear the cutting less quickly, so that a longer life is achievable.

Die Aufgabe ist bei einer gattungsgemässen Rotationsschneidmaschine dadurch gelöst, dass die Drehzahl wenigstens eines der beiden Messer aufgrund einer Transportgeschwindigkeit der Transportvorrichtung und der Dicke des Schuppenstroms durch die Steuervorrichtung bestimmt ist. Der Erfindung liegt die Erkenntnis zugrunde, dass bei solchen Rotationsschneidmaschinen häufig nur noch mit der Spitze der Schneiden geschnitten wird. Dadurch nutzen sich die Schneiden jeweils in einem kleinen Teilbereich wesentlich rascher ab, als bei einer optimalen Benutzung der Schneiden. Bei einer solchen optimalen Benutzung wird die Schneide zu etwa 70% ausgenützt. Dies ist aber in der Regel nur dann der Fall, wenn bei maximaler Dicke des Produktestroms und bei maximaler Geschwindigkeit geschnitten wird. Bei sehr dünnen Produkten oder tiefen Transportgeschwindigkeiten kommen die Schneiden jedoch lediglich mit der Spitze in Eingriff, was die genannte sehr schnelle Abnutzung bewirkt. Durch die Regelung der Drehzahl gemäss der Erfindung wird erreicht, dass die Umfangsgeschwindigkeit wenigstens eines Messers auch bei sich ändernden Eigenschaften immer optimal an die zu schneidenden Produkte angepasst wird. Die Eigenschaften des Produktestroms, die hier insbesondere und vorzugsweise verwendet werden, sind die Dicke des Produktestroms sowie die Transportgeschwindigkeit. Es können aber auch andere Eigenschaften zur Regelung verwendet werden, wie beispielsweise die Materialart und insbesondere die Papierart der Produkte.The object is achieved in a generic rotary cutting machine characterized in that the speed of at least one of the two blades is determined by a speed of transport of the transport device and the thickness of the scale flow through the control device. The invention is based on the finding that in such rotary cutting machines often only with the tip of the cutting is cut. As a result, the cutting edges are used much faster in each case in a small subarea than when the cutting edges are used optimally. With such optimal use, the cutting edge is utilized to about 70%. However, this is usually the case only when cutting at maximum thickness of the product stream and at maximum speed. However, with very thin products or low transport speeds, the blades only engage the tip, causing the aforementioned very rapid wear. By controlling the speed according to the invention is achieved that the peripheral speed of at least one blade is always optimally adapted to the products to be cut, even with changing properties. The properties of the product stream which are particularly and preferably used here are the thickness of the product stream and the transport speed. However, it is also possible to use other control properties, for example the type of material and in particular the paper type of the products.

Nach einer Weiterbildung der Erfindung ist vorgesehen, dass wenigstens eines der Messer von einem drehzahlgesteurten Motor angetrieben ist. Dies ermöglicht eine besonders einfache und genaue Regelung der Drehgeschwindigkeit des entsprechenden Messers.According to a development of the invention it is provided that at least one of the knives is driven by a speed-controlled motor. This allows a particularly simple and accurate control of the rotational speed of the corresponding blade.

Nach einer Weiterbildung der Erfindung ist vorgesehen, dass beide Messer jeweils von einem drehzahlgesteuerten Motor angetrieben sind. Die beiden Messer können dann unabhängig voneinander genau und vergleichsweise einfach an die zu regelnden Eigenschaften des Produktestroms und/oder der Produkte angepasst werden. Damit kann die Standzeit beider Messer noch weiter verlängert werden.According to a development of the invention it is provided that both blades are each driven by a speed-controlled motor. The two knives can then be adjusted independently and comparatively easily to the properties of the product stream and / or the products to be controlled. Thus, the life of both knives can be extended even further.

Nach einer Weiterbildung der Erfindung ist vorgesehen, dass die an der angetriebenen Messerwelle aufzubringende Kraft gemessen wird und dass das Messresultat zum Prüfen des Schneidenzustands verwendet wird. Damit kann sichergestellt werden, dass die Schneiden jeweils zum optimalen Zeitpunkt nachgeschliffen bzw. ausgewechselt werden. Zudem kann eine ungenügende Schnittqualität aufgrund abgenutzter Schneiden vermieden werden.According to a development of the invention, it is provided that the force to be applied to the driven blade shaft is measured and that the measurement result is used to check the cutting condition. This can be ensured that the cutting edges are reground or replaced at the optimum time. In addition, an insufficient cut quality due to worn cutting edges can be avoided.

Die bevorzugten Eigenschaften zur Regelung des wenigstens einen Messers sind die Dicke des Produktestroms und die Transportgeschwindigkeit. Durch Verwendung einer weiteren oder von weiteren Eigenschaften kann die Abnutzung der Schneiden noch weiter verringert werden. Hierzu wird insbesondere als dritte Eigenschaft die Materialeigenschaft der Produkte, beispielsweise die Papierart verwendet.The preferred properties for controlling the at least one blade are the thickness of the product stream and the transport speed. By using a further or further properties, the wear of the cutting can be further reduced. For this purpose, the material property of the products, for example the type of paper, is used in particular as the third property.

Wird die Dicke der Produkte bzw. des Produktestroms zur Regelung des wenigstens einen Messers verwendet, so erfolgt dies gemäss einer Weiterbildung der Erfindung mit Messmitteln, beispielsweise einem Sensor, der die Dicke des Produktestroms ermittelt und der entsprechenden Steuervorrichtung bzw. Regelvorrichtung zuführt. Die Transportgeschwindigkeit kann ebenfalls mit geeigneten Messmitteln ermittelt werden, Grundsätzlich ist es aber auch möglich, die Geschwindigkeit direkt von der Transportvorrichtung, beispielsweise einem Transportband zu übernehmen.If the thickness of the products or of the product stream is used to control the at least one knife, this is done according to an embodiment of the invention with measuring means, for example a sensor which determines the thickness of the product stream and feeds it to the corresponding control device or regulating device. The transport speed can also be determined with suitable measuring means, but in principle it is also possible to take over the speed directly from the transport device, for example a conveyor belt.

Weitere vorteilhafte Merkmale ergeben sich aus den abhängigen Patentansprüchen, der nachfolgenden Beschreibung sowie der Zeichnung.Further advantageous features emerge from the dependent claims, the following description and the drawings.

Ausführungsbeispiele der Erfindung werden nachfolgend anhand der Zeichnung näher erläutert. Es zeigen:

Fig. 1
schematisch eine räumliche Ansicht einer erfindungsgemässen Rotationsschneidmaschine,
Fig. 2
schematisch eine Teilansicht zweier Schneiden und des Produktestroms zur Illustration des Schneidvorgangs und
Fig. 3
ein Schema zur Illustration der Regelung der erfindungsgemässen Rotationsschneidmaschine.
Embodiments of the invention will be explained in more detail with reference to the drawing. Show it:
Fig. 1
2 is a schematic view of a three-dimensional view of a rotary cutting machine according to the invention;
Fig. 2
schematically a partial view of two cutting edges and the product flow to illustrate the cutting process and
Fig. 3
a scheme for illustrating the control of the inventive rotary cutting machine.

Die in Figur 1 gezeigte Rotationsschneidmaschine 1 dient zum Schneiden eines Stroms aus Produkten, insbesondere Druckerzeugnissen wie beispielsweise Zeitungen, Zeitschriften, gefalteten Bögen oder auch Einzelblättern. Die Produkte 13 werden insbesondere in einem Schuppenstrom 12 gefördert. Die Produkte 13 kommen beispielsweise von einer hier nicht gezeigten Rotationsdruckmaschine und werden gemäss Figur 2 von einer Transportvorrichtung 11 in Richtung des Pfeils 14 transportiert. Die Transportvorrichtung 11 kann in bekannter Weise ausgebildet und beispielsweise ein Bandförderer sein. Die Geschwindigkeit der Transportvorrichtung 11 ist in der Regel konstant und wird durch die vorgeschalteten Maschinen, insbesondere beispielsweise der Druckmaschine gegeben. Die Geschwindigkeit der Transportvorrichtung 11 kann je nach Produkt 13 sehr unterschiedlich und damit vergleichsweise langsam bzw. sehr schnell sein. Die Geschwindigkeit kann beispielsweise bis 1,2 m/s betragen. Die Produkte 13 werden in Längsrichtung des Schuppenstroms 12 geschnitten, wobei ein hier nicht näher bezeichneter Rand der Produkte 13 abgetrennt wird.In the FIG. 1 shown rotary cutting machine 1 is used to cut a stream of products, especially printed matter such as newspapers, magazines, folded sheets or single sheets. The products 13 are conveyed in particular in a scale flow 12. The products 13 come, for example, from a rotary printing press not shown here and are according to FIG. 2 transported by a transport device 11 in the direction of the arrow 14. The transport device 11 may be formed in a known manner and, for example, be a belt conveyor. The speed of the transport device 11 is usually constant and is given by the upstream machines, in particular, for example, the printing press. The speed of the transport device 11 can be very different and thus comparatively slow or very fast, depending on the product 13. The speed can be, for example, up to 1.2 m / s. The products 13 are cut in the longitudinal direction of the scale flow 12, with an unspecified edge of the products 13 being separated off.

Die Rotationsschneidmaschine 1 besitzt ein Maschinengestell 2, an dem ein Obermesser 4 und ein Untermesser 5 rotierbar gelagert sind. Das Messer 4 besitzt eine hier nicht gezeigte und an sich bekannte Messerwelle, die im Maschinengestell 2 gelagert ist. Diese Messerwelle ist parallel zu einer Messerwelle des Untermessers 5, die ebenfalls im Maschinengestell 2 gelagert ist. Die Messerwelle des Untermessers 5 kann zur Einstellung des Schnittspalts zwischen dem Obermesser 4 und dem Untermesser 5 in ihrer Längsrichtung verschiebbar sein, wie dies in der EP 1 637 295 A offenbart ist.The rotary cutting machine 1 has a machine frame 2, on which an upper blade 4 and a lower blade 5 are rotatably mounted. The knife 4 has a knife shaft, not shown here and known per se, which is mounted in the machine frame 2 is. This blade shaft is parallel to a blade shaft of the lower blade 5, which is also mounted in the machine frame 2. The knife shaft of the lower blade 5 may be displaceable in the longitudinal direction for adjusting the cutting gap between the upper blade 4 and the lower blade 5, as shown in the EP 1 637 295 A is disclosed.

Das Obermesser 4 ist ein so genanntes Segmentmesser und besitzt eine Platte 7 als Träger, die mit einem Flansch 28 an der hier nicht sichtbaren Messerwelle befestigt ist. Am Umfang der Platte 7 sind mehrere Schneiden 6 aus Hartmetall oder einem anderen geeigneten Werkstoff festgeklemmt. Solche Schneiden 6 werden auch als Klinken bezeichnet. Sie besitzen jeweils gemäss Figur 2 eine Schneidkante 16, mit welcher die Produkte 13 geschnitten werden. Diese Schneidkanten 16 müssen periodisch geschliffen werden, wie dies beispielsweise in der EP 1 510 288 A beschrieben ist. Die Schneidkanten 16 erstrecken sich jeweils zwischen einer Spitze 18 und einer Ecke 20.The upper blade 4 is a so-called segment blade and has a plate 7 as a carrier, which is fastened with a flange 28 on the blade shaft not visible here. At the periphery of the plate 7 more cutting edges 6 are clamped hard metal or other suitable material. Such cutting 6 are also referred to as pawls. They each have according to FIG. 2 a cutting edge 16 with which the products 13 are cut. These cutting edges 16 must be ground periodically, as for example in the EP 1 510 288 A is described. The cutting edges 16 each extend between a tip 18 and a corner 20.

Das Obermesser 4 ist von einem Motor M angetrieben, der über ein hier lediglich angedeutetes Getriebe 3 auf die Messerwelle des Obermessers 4 wirkt. Das Obermesser 4 ist in Richtung des Pfeils 9 angetrieben. Der Motor M ist insbesondere ein Elektromotor und insbesondere ein drehzahlgesteuerter Servomotor.The upper blade 4 is driven by a motor M, which acts on a merely indicated here transmission 3 on the blade shaft of the upper blade 4. The upper blade 4 is driven in the direction of the arrow 9. The motor M is in particular an electric motor and in particular a speed-controlled servomotor.

Das Untermesser 5 besitzt einen Ring 8, der auf einem scheibenförmigen Träger 29 befestigt ist. Der Ring 8 besteht insbesondere aus Hartmetall und ist beispielsweise auf den Träger 29 aufgeklebt. Er besitzt eine hier nicht gezeigte Innenseite, die nachschleifbar ist. Zwischen dieser Innenseite und den Schneiden 6 besteht ein Schnittspalt im Bereich von beispielsweise 0.03 mm bis 0.035 mm. Das Untermesser 5 ist in Richtung des Pfeils 10 angetrieben. Dieser Antrieb kann passiv sein, die Geschwindigkeit des Untermessers 5 passt sich damit selbsttätig der Geschwindigkeit des Obermessers 4 an. Das Untermesser 5 kann aber auch aktiv vom Motor M über ein hier nicht gezeigtes Getriebe angetrieben sein. Schliesslich kann das Untermesser 5 auch von einem eigenen Motor M' angetrieben sein, der bei einem hier nicht gezeigten Getriebe auf die Messerwelle des Untermessers 5 wirkt. Dieser in Figur 1 angedeutete Motor M' ist vorzugsweise ebenfalls ein Elektromotor und insbesondere ein drehzahlgesteuerter Servomotor.The lower blade 5 has a ring 8 which is mounted on a disc-shaped support 29. The ring 8 consists in particular of hard metal and is glued, for example, on the support 29. He has an inside, not shown here, which is nachschleifbar. Between this inside and the blades 6 there is a kerf in the range of, for example 0.03 mm to 0.035 mm. The lower blade 5 is driven in the direction of the arrow 10. This drive can be passive, the speed of the lower blade 5 automatically adapts to the speed of the upper blade 4. The lower blade 5 can also be actively driven by the engine M via a gear not shown here. Finally, the lower blade 5 can also be driven by its own motor M ', which acts on the blade shaft of the lower blade 5 in a gear, not shown here. This in FIG. 1 indicated motor M 'is preferably also an electric motor and in particular a speed-controlled servo motor.

Bei der Rotationsschneidmaschine 1 gemäss Figur 1 ist das O-bermesser 4 bzw. das Segmentmesser oben und das Untermesser 5 unten. Denkbar ist aber auch eine Ausführung, bei welcher das Untermesser 5 als Segmentmesser ausgebildet und der Schuppenstrom 12 somit von unten geschnitten wird. Der Schuppenstrom 12 ist dann entsprechend so ausgebildet, dass die Kanten der Produkte 13 unten sind.In the rotary cutting machine 1 according to FIG. 1 is the O-beater 4 and the segment knife above and the lower blade 5 below. It is also conceivable, however, a design in which the lower blade 5 is formed as a segment blade and the scale flow 12 is thus cut from below. The shingled stream 12 is then correspondingly formed so that the edges of the products 13 are below.

Die in Figur 2 angedeutete Dicke H des Schuppenstroms 12 kann abhängig von den Produkten 13 sowie der Anordnung der Produkte des Schuppenstroms sehr unterschiedlich sein. Diese Dicke H wird vor dem Schneidvorgang mit dem in Figur 3 angedeuteten Sensor 24 oder einer anderen geeigneten Messvorrichtung ermittelt. Der Sensor 24 ist beispielsweise eine berührungslose Distanzmessvorrichtung, die gemäss Figur 3 in der Richtung des Pfeils 21 misst, oder auch beispielsweise eine mechanische Tastvorrichtung. Die gemessene Dicke H wird einer Steuervorrichtung S zugeführt, die mit einem Drehzahlregler 25 des Motors M verbunden ist. Ist das Untermesser 5 mit dem Motor M' angetrieben, so wird zudem ein Steuersignal einem Drehzahlregler 26 des Motors M' zugeführt. Ausser der Dicke H wird mit einem weiteren Sensor 23 die in Figur 3 mit dem Pfeil 22 angedeutete Geschwindigkeit des Schuppenstroms 12 ermittelt. Der Sensor 23 kann berührungslos oder ein an sich bekannter mechanischer Geschwindigkeitsmesser sein. Das Messen der Geschwindigkeit von Schuppenströmen ist dem Fachmann an sich gut bekannt. Der Sensor 23 kann auch in der Transportvorrichtung 11 integriert sein. Die gemessene Geschwindigkeit wird ebenfalls der Steuervorrichtung S zugeführt, die die entsprechenden Signale dem Drehzahlregler 25 und gegebenenfalls auch dem Drehzahlregler 26 zuführt.In the FIG. 2 indicated thickness H of the scale flow 12 may be very different depending on the products 13 and the arrangement of the products of the scale flow. This thickness H is before the cutting process with the in FIG. 3 indicated sensor 24 or other suitable measuring device determined. The sensor 24 is for example a non-contact distance measuring device according to FIG. 3 in the direction of the arrow 21, or also, for example, a mechanical sensing device. The measured thickness H is supplied to a control device S, which is connected to a speed controller 25 of the motor M. Is the lower blade 5 with the motor M ' driven, so also a control signal to a speed controller 26 of the motor M 'is supplied. Except the thickness H is with another sensor 23 in FIG. 3 determined by the arrow 22 speed of the scale flow 12 indicated. The sensor 23 may be non-contact or a known mechanical speedometer. Measuring the velocity of scale flows is well known to those skilled in the art. The sensor 23 may also be integrated in the transport device 11. The measured speed is also supplied to the control device S, which supplies the corresponding signals to the speed controller 25 and possibly also to the speed controller 26.

Aufgrund der gemessenen Dicke H und/oder der gemessenen Transportgeschwindigkeit wird durch die Steuerung S die Drehzahl des Obermessers 4 vorgegeben. Die Berechnung dieser Drehzahl erfolgt so, dass die Schneidkante 16 jeweils optimal für den Schnittvorgang benutzt wird. Eine optimale Nutzung liegt dann vor, wenn der in Figur 2 gezeigte Bereich 17 beispielsweise etwa 70% der gesamten Länge der Schneidkante 16 beträgt. Der Bereich 17 geht von der Spitze 18 aus und erstreckt sich bis zu dem in Figur 2 gezeigten Auftreffpunkt P. Dieser Auftreffpunkt P ist der Punkt, an dem die Schneidkante 16 auf das zu schneidende Produkt 13 auftrifft. Die Schneiden 6 werden somit im Bereich 17 benutzt und somit in diesem Bereich mit der Zeit unscharf. Der Bereich 17 kann auch etwas weniger als 70%, beispielsweise auch 60% oder 50% der Länge der Schneidkante 16 betragen. Die Schneidkante 16 verläuft zwischen der Spitze 18 und der Ecke 20 vorzugsweise gerade, es ist jedoch auch ungerader Verlauf denkbar.Due to the measured thickness H and / or the measured transport speed, the speed of the upper blade 4 is predetermined by the controller S. The calculation of this speed is such that the cutting edge 16 is used optimally for the cutting process. Optimum use is when the in FIG. 2 shown area 17, for example, about 70% of the total length of the cutting edge 16 is. The region 17 starts from the tip 18 and extends to the in FIG. 2 impingement point P. This impingement point P is the point at which the cutting edge 16 strikes the product 13 to be cut. The blades 6 are thus used in the area 17 and thus blurred in this area with time. The region 17 may also be slightly less than 70%, for example 60% or 50% of the length of the cutting edge 16. The cutting edge 16 preferably extends straight between the tip 18 and the corner 20, but it is also conceivable odd course.

Ist ein Motor M' vorgesehen, so kann durch die Steuerung S auch die Drehzahl des Untermesser 5 aufgrund einer Eigenschaft und insbesondere der Dicke H und/oder der Geschwindigkeit des Schuppenstroms 12 berechnet werden. Die Regelung der beiden Motoren M und M' ist vorzugsweise unabhängig voneinander. Die Drehzahlen der beiden Messer 4 und 5 können dann optimal bezüglich der Dicke und/oder der Transportgeschwindigkeit des Schuppenstroms 12 geregelt werden. Grundsätzlich ist eine Regelung allein aufgrund der Transportgeschwindigkeit oder der Dicke H möglich. Vorzugsweise werden aber beide Grössen berücksichtigt. Bleibt die Transportgeschwindigkeit des Schuppenstroms 12 konstant und wird auch bei unterschiedlich dicken Produkten 13 nicht geändert, so erfolgt die Regelung selbstverständlich lediglich aufgrund der Dicke H. Bei konstanter Dicke H und unterschiedlicher Transportgeschwindigkeit erfolgt die Regelung dann entsprechend aufgrund der Transportgeschwindigkeit.If a motor M 'is provided, the speed of the lower blade 5 can also be calculated by the controller S on the basis of a property and in particular the thickness H and / or the speed of the scale flow 12. The regulation of the two motors M and M 'is preferably independent of each other. The rotational speeds of the two blades 4 and 5 can then be optimally controlled with respect to the thickness and / or the transport speed of the scale flow 12. In principle, a control is possible solely on the basis of the transport speed or the thickness H. Preferably, however, both sizes are taken into account. If the transport speed of the scale flow 12 remains constant and is not changed even with products 13 of different thicknesses, the regulation is of course only due to the thickness H. With constant thickness H and different transport speed, the regulation then takes place correspondingly on the basis of the transport speed.

Zur Berechnung der optimalen Drehzahlen des Obermessers (4) und/oder des Untermessers (5) können der Steuervorrichtung S durch manuelle Eingabe oder durch Verbinden mit zusätzlichen Messvorrichtungen weitere Eigenschaften des Schuppenstromes 12 resp. der Druckprodukte zugeführt werden.To calculate the optimum rotational speeds of the upper blade (4) and / or the lower blade (5) of the control device S by manual input or by connecting additional measuring devices further properties of the scale flow 12, respectively. the printed products are supplied.

Bei optimaler Regelung treffen die Schneiden 6 wie bereis oben erläutert jeweils optimal in der Ebene einer Oberseite 27 (Fig. 2) auf die Produkte 13 auf. Beim Schneidvorgang bildet sich eine Schnittkurve 19, welche durch die Schneidkanten 16 im Bereich 17 gebildet wird. Die Schneidkanten 16 bewegen sich gemäss Figur 2 in Richtung des Pfeils 15 und die Produkte 13 in Richtung des Pfeils 14. Beim Schneidvorgang bewegen sich somit die Schneiden 6 und gleichzeitig auch die Produkte 13. Die Figur 2 zeigt eine Schneide 6 in der Position, in welcher sie auf das Produkt 13 auftrifft und eine Schneide 6', die nach dem Schneidvorgang das Produkt 13 eben verlässt. Ändert sich die Geschwindigkeit der Produkte 13 und/oder die Dicke H, so wird entsprechend die Drehzahl des Obermessers 4 und gegebenenfalls auch die Drehzahl des Untermessers 5 aufgrund der genannten Regelung der Steuervorrichtung S geändert. Für die optimale Positionierung des Auftreffpunktes P ist die Umfangsgeschwindigkeit des Obermessers 4 massgebend, die hier von der Drehzahl direkt abhängig ist.With optimum control, the cutting edges 6 optimally meet in the plane of an upper side 27, as explained above. Fig. 2 ) on the products 13 on. During the cutting process, a cutting curve 19 is formed, which is formed by the cutting edges 16 in the region 17. The cutting edges 16 move according to FIG. 2 in the direction of arrow 15 and the products 13 in the direction of arrow 14. During the cutting process to move thus the cutting edges 6 and at the same time the products 13. The FIG. 2 shows a cutting edge 6 in the position in which it impinges on the product 13 and a cutting edge 6 ', which just leaves the product 13 after the cutting process. If the speed of the products 13 and / or the thickness H changes, then the speed of the upper blade 4 and possibly also the rotational speed of the lower blade 5 are correspondingly changed on the basis of the aforementioned regulation of the control device S. For the optimal positioning of the impact point P, the peripheral speed of the upper blade 4 is decisive, which is directly dependent on the speed here.

Für die Regelung ergeben sich mehrere Fälle, von denen einige in der nachfolgenden Tabelle aufgelistet sind. Fall Nr. Dicke H Transportgeschwindigkeit V Drehzahl Obermesser Drehzahl Untermesser 1 grösser/kleiner Gleich höher/tiefer gleich 2 grösser/kleiner gleich Gleich Höher/tiefer 3 grösser/kleiner gleich höher/tiefer Höher/tiefer 4 gleich grösser/kleiner höher/tiefer gleich 5 gleich grösser/kleiner Gleich Höher/tiefer 6 gleich grösser/kleiner höher/tiefer Höher/tiefer 7 grösser/kleiner grösser/kleiner höher/tiefer gleich 8 grösser/kleiner grösser/kleiner Gleich Höher/tiefer 9 grösser/kleiner grösser/kleiner höher/tiefer Höher/tiefer There are several cases for the scheme, some of which are listed in the table below. Case no. Thickness H Transport speed V Speed upper blade Speed lower blade 1 bigger smaller Equal higher / lower equal 2 bigger smaller equal Equal Higher / lower 3 bigger smaller equal higher / lower Higher / lower 4 equal bigger smaller higher / lower equal 5 equal bigger smaller Equal Higher / lower 6 equal bigger smaller higher / lower Higher / lower 7 bigger smaller bigger smaller higher / lower equal 8th bigger smaller bigger smaller Equal Higher / lower 9 bigger smaller bigger smaller higher / lower Higher / lower

Beim Fall 1 der oben genannten Tabelle ist die Transportgeschwindigkeit gleichbleibend und auch die Drehzahl des Untermessers 5 bleibt gleich. Wird die Dicke H des Schuppenstroms 12 grösser, so wird die Drehzahl des Obermessers 4 erhöht. Nimmt die Dicke H jedoch ab, so wird die Drehzahl des Obermessers 4 vermindert. Die Regelung erfolgt so, dass die Schneiden 6 jeweils im optimalen Auftreffpunkt P den Schneidvorgang beginnen. In diesem Fall wird somit lediglich die Drehzahl des Obermessers 4 aufgrund der Dicke H geregelt. Im Fall 9 sind sowohl die Dicke H als auch die Transportgeschwindigkeit Parameter zur Regelung der Drehzahl des Obermessers 4 und des Untermessers 5. Werden weitere Parameter wie die oben genannte Papierqualität zur Regelung benutzt, so ergeben sich auch noch andere Fälle. Aufgrund der optimalen Regelung ergibt sich eine höhere Standzeit und auch eine gleichbleibende optimale Schnittqualität.In Case 1 of the above table, the transport speed is constant and the speed of the lower blade 5 remains the same. If the thickness H of the scale flow 12 is greater, the speed of the upper blade 4 is increased. However, if the thickness H decreases, the speed of the upper blade 4 is reduced. The regulation takes place in such a way that the cutting edges 6 each begin the cutting process at the optimum impact point P. In this case, therefore, only the rotational speed of the upper blade 4 is controlled due to the thickness H. In case 9, both the thickness H and the transport speed are parameters for controlling the rotational speed of the upper blade 4 and the lower blade 5. If other parameters such as the paper quality mentioned above are used for control, then other cases also arise. Due to the optimal control results in a longer service life and a consistent optimum cut quality.

Bei der Regelung kann auch die aufzubringende Kraft an den Messerwellen oder wenigstens an einer Messerwelle berücksichtigt werden. Diese Kraft kann beispielsweise über die Stromaufnahme der Motoren M bzw. M' von den Drehzahlreglern 25 und 26 gemessen und zur Auswertung der Steuervorrichtung S zugeführt werden. So können Rückschlüsse auf den Zustand der Schneiden 6 bzw. der Schneidkanten 16 und des Rings 8 gemacht werden. Mit einer entsprechenden Anzeige kann sichergestellt werden, dass die Schneiden 6 bzw. der Hartmetallring 8 rechtzeitig nachgeschliffen oder ausgetauscht werden.In the scheme, the force to be applied to the blade shafts or at least on a blade shaft can be considered. This force can be measured for example via the current consumption of the motors M and M 'of the speed controllers 25 and 26 and fed to the evaluation of the control device S. So conclusions about the state of the cutting edges 6 and the cutting edges 16 and the ring 8 can be made. With a corresponding indication can be ensured that the blades 6 and the carbide ring 8 are reground or replaced in a timely manner.

Claims (10)

Vorrichtung zum Schneiden eines aus Druckprodukten (13) gebildeten Schuppenstroms (12), bestehend aus einem mit einem rotierenden Untermesser (5) zusammenwirkenden, entgegengesetzt rotierenden Obermesser (4), zwischen denen der Schuppenstrom (12) mittels Transportvorrichtung (11) hindurchgeführt wird, wobei wenigstens eines der Messer (4, 5) mit mehreren am Umfang verteilt angeordneten Schneiden (6) ausgebildet ist, und mit einer Steuervorrichtung (S) zum Steuern des Antriebs der Messer (4, 5), dadurch gekennzeichnet, dass die Drehzahl wenigstens eines der beiden Messer (4, 5) aufgrund einer Transportgeschwindigkeit der Transportvorrichtung (11) und der Dicke (H) des Schuppenstroms (12) durch die Steuervorrichtung (S) bestimmt ist.Apparatus for cutting an imbricated flow (12) formed from printed products (13), consisting of an oppositely rotating upper blade (4) cooperating with a rotating lower blade (5), between which the shingled stream (12) is passed by means of a transport device (11) at least one of the knives (4, 5) having a plurality of circumferentially spaced cutting edges (6) is formed, and a control device (S) for controlling the driving of the knives (4, 5), characterized in that the rotational speed of at least one of Both knives (4, 5) due to a transport speed of the transport device (11) and the thickness (H) of the scale flow (12) by the control device (S) is determined. Vorrichtung zum Schneiden nach Anspruch 1, dadurch gekennzeichnet, dass die Drehzahl des mit Schneiden(6) ausgebildeten Messers(4) geregelt ist.Cutting device according to claim 1, characterized in that the speed of rotation of the blade (6) formed knife (4) is regulated. Vorrichtung zum Schneiden nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Drehzahl des Obermessers (4) und/oder des Untermessers (5) geregelt ist.An apparatus for cutting according to claim 1 or 2, characterized in that the rotational speed of the upper knife (4) and / or the lower blade (5) is regulated. Vorrichtung zum Schneiden nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass wenigstens eines der beiden Messer (4, 5) mit einem drehzahlgeregelten Motor (M, M') angetrieben ist.An apparatus for cutting according to any one of claims 1 to 3, characterized in that at least one of the two blades (4, 5) with a variable speed motor (M, M ') is driven. Vorrichtung zum Schneiden nach Anspruch 4, dadurch gekennzeichnet, dass das Obermesser (4) als auch das Untermesser (5) jeweils unabhängig voneinander von einem drehzahlgesteuerten Motor (M, M') angetrieben sind.Device for cutting according to claim 4, characterized in that the upper blade (4) and the lower blade (5) are each driven independently of each other by a speed-controlled motor (M, M '). Vorrichtung zum Schneiden nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass wenigstens eines der beiden Messer (4, 5) aufgrund der Transportgeschwindigkeit des Produktestroms (12) und/oder der Dicke (H) des Produktestroms geregelt wird.Cutting device according to one of claims 1 to 5, characterized in that at least one of the two blades (4, 5) is controlled by the transport speed of the product stream (12) and / or the thickness (H) of the product stream. Vorrichtung zum Schneiden nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass wenigstens ein Messmittel (24) zum Ermitteln der Dicke (H) des Produktestroms (12) und/oder wenigstens ein Messmittel (23) zum Ermitteln der Transportgeschwindigkeit des Produktestroms (12) vorgesehen sind und dass diese Mittel zur Regelung der Drehzahl wenigstens eines der Messer (4, 5) benutzt wird.Cutting device according to one of claims 1 to 6, characterized in that at least one measuring means (24) for determining the thickness (H) of the product stream (12) and / or at least one measuring means (23) for determining the transport speed of the product stream (12 ) are provided and that this means for controlling the speed of at least one of the knives (4, 5) is used. Vorrichtung zum Schneiden nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Drehzahl wenigstens eines Messers (4, 5) so bestimmt ist, dass Schneidkanten (16) der Schneiden (6) in einem Längenbereich von wenigstens 50% benutzt werden.Cutting device according to one of claims 1 to 7, characterized in that the speed of rotation of at least one blade (4, 5) is determined so that cutting edges (16) of the blades (6) are used in a length range of at least 50%. Vorrichtung zum Schneiden nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass sie Mittel aufweist, um die an einer angetriebenen Messerwelle aufzubringende Kraft zu messen.Cutting device according to one of claims 1 to 8, characterized in that it comprises means for measuring the force to be applied to a driven knife shaft. Vorrichtung zum Schneiden nach Anspruch 9, dadurch gekennzeichnet, dass die Stromaufnahme wenigstens eines Motors (M, M') zur Bestimmung der Kraft gemessen wird.Cutting device according to claim 9, characterized in that the current consumption of at least one motor (M, M ') for determining the force is measured.
EP20070405027 2007-02-02 2007-02-02 Device for cutting printed products fed in an overlapping formation Withdrawn EP1952956A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20070405027 EP1952956A1 (en) 2007-02-02 2007-02-02 Device for cutting printed products fed in an overlapping formation
US12/068,079 US8011280B2 (en) 2007-02-02 2008-02-01 Rotary cutter for trimming printed products conveyed in an overlapping flow
JP2008023400A JP2008188765A (en) 2007-02-02 2008-02-02 Cutting device for printed matter fed in overlapping formation
CN2008100089931A CN101234491B (en) 2007-02-02 2008-02-02 Device for cutting printed products fed in an overlapping formation

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EP20070405027 EP1952956A1 (en) 2007-02-02 2007-02-02 Device for cutting printed products fed in an overlapping formation

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EP1952956A1 true EP1952956A1 (en) 2008-08-06

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US8011280B2 (en) 2011-09-06
US20080202304A1 (en) 2008-08-28
JP2008188765A (en) 2008-08-21
CN101234491A (en) 2008-08-06
CN101234491B (en) 2011-11-16

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