EP1063087B1 - Vorrichtung und Verfahren zum Schneiden von Materialbahnen - Google Patents

Vorrichtung und Verfahren zum Schneiden von Materialbahnen Download PDF

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Publication number
EP1063087B1
EP1063087B1 EP00111002A EP00111002A EP1063087B1 EP 1063087 B1 EP1063087 B1 EP 1063087B1 EP 00111002 A EP00111002 A EP 00111002A EP 00111002 A EP00111002 A EP 00111002A EP 1063087 B1 EP1063087 B1 EP 1063087B1
Authority
EP
European Patent Office
Prior art keywords
cutting
valve
given pressure
air pressure
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00111002A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1063087A1 (de
Inventor
Charles Burke David
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP1063087A1 publication Critical patent/EP1063087A1/de
Application granted granted Critical
Publication of EP1063087B1 publication Critical patent/EP1063087B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/02—Tearing
    • 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
    • B26D1/04—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 linearly-movable cutting member
    • B26D1/06—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 linearly-movable cutting member wherein the cutting member reciprocates
    • B26D1/065—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 linearly-movable cutting member wherein the cutting member reciprocates for thin material, e.g. for sheets, strips or the like
    • 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
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/12—Fluid-pressure means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • 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
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8858—Fluid pressure actuated

Definitions

  • the present invention relates to an apparatus and a method for cutting Material webs preferably in a printing press, in particular in a folder Web-fed rotary offset printing machine according to the preamble of claims 1 and 8.
  • Known devices for cutting or severing webs in one Folders include an air cylinder which is a cutting knife on a web or moved to and through a web strand. To do this, the compressed air at the drain one side of the air cylinder and the other side into the Flow in the compressed air cylinder. This begins with the build-up of pressure in the compressed air cylinder Knife to move.
  • the time required to cut the web is a critical aspect of this process.
  • the knife begins to move as soon as compressed air in the Compressed air cylinder flows in and contacts the web before reaching the maximum Air pressure in the compressed air cylinder. If the knife does not hit the knife with its full force Web, there is a risk that the web will drag along the knife before it is severed. This sometimes leads to meter-long grinding marks on the material web and increases the risk that wrapping the freshly printed web side around it Printing unit cylinder to damage the same or from their bearings.
  • the cutting process was further enhanced by optimizing the angle, below where the cutting knife hits the track, designed more efficiently. All of these changes led to an improvement in the cutting process. Due to the steadily increasing Web speed, however, the cutting process must be accelerated even more, than is possible individually or in combination through the above improvements.
  • DE-U-298 09 334 shows a web cutting device, with a knife, which a piston is mounted for movement along the axis of a piston chamber. To a previous cutting process is first the piston chamber with a Return pressure through return pressure channels, whereby the Piston together with the knife moved to the bottom of the piston chamber.
  • EP 0 739 695 A2 also describes a web cutting device, which a Knife, which is connected via a piston rod to a piston, the Piston is movably mounted in a cylinder. By opening a control valve one side of the piston is subjected to a working pressure of approximately 4 bar, so that the Piston together with the knife performs a striking movement, which is carried out by a brake pad is caught.
  • US 4,699,031 discloses an automatic cutting device a sheet of foam material, which a cutting station with a Pneumatic cylinder, which has a piston rod and with a not shown includes electrically operated sulenoid valve. The piston rod enters Movable cutting knife for cutting through the foam-like sheet material.
  • An inventive device for cutting or severing Material webs comprise a compressed air cylinder with a first side and a second Side, a first valve connected to the first side of the air cylinder, the Compressed air at a first predetermined pressure in a non-cutting state of the compressed air cylinder to the first side, and one with the second side of the air cylinder connected second valve and with a cutting element, the second valve in a non-cutting State of the compressed air cylinder compressed air under a second predetermined Pressure, which is greater than the first predetermined pressure, to the compressed air cylinder, wherein the second predetermined pressure during a cutting process on the cutting cylinder can be quickly reduced to a value below the first predetermined pressure.
  • the device further comprises an immediate, i.e. H. without joint with the Air cylinder connected and driven by this cutting element Cutting a web of material.
  • the first valve and the second valve are preferably designed as three-way valves.
  • the first predetermined pressure is preferably between about 480,000 Pa (4.8 bar) and 510,000 Pa (5.1 bar), and the second predetermined pressure is preferably greater than or equal to about 620,000 Pa (6.2 bar).
  • first and second predetermined pressure there is also preferably one connected to the air cylinder and the first and second valves Control unit provided that the transition of the air cylinder from the non-cutting Controls the state of the cutting process.
  • the cutting element preferably comprises a knife for severing the web.
  • the compressed air cylinder preferably further comprises one with the second side of the Compressed air cylinder connected quick exhaust valve, by means of which the second predetermined Pressure to initiate the cutting process quickly and efficiently to a value below the first predetermined pressure is reduced.
  • steps b) and c) are preferably repeated for each cutting process.
  • a control unit is also provided, which is used to control the first and second predetermined pressure and the transition from the idle state to the cutting process Sends out control signals that the compressed air cylinder receives.
  • the first predetermined pressure the first valve and for generating the second predetermined Pressure through the second valve Control signals of the control unit can be controlled.
  • Fig. 1 shows a web cutting device 1 of the prior art, the four-way valve 2 with a compressed air inflow opening 3, a first compressed air outflow opening 4 and a second compressed air inflow / outflow opening 5.
  • the first compressed air outlet 4 and the second compressed air inflow / outflow opening 5 fluidly connected to a compressed air cylinder 6, which they on a first side 9 and can act on a second side 10 with compressed air.
  • the Pressure on the second side 10 of the air cylinder 6 at about 620,000 (6.2 bar) and the pressure on the first side 9 of the compressed air cylinder 6 is kept at 0 Pa (0 bar).
  • the cutting device is in the so-called idle state, i. H. it will no web cut, and the cutting element 7 is also at rest.
  • the compressed air (of approximately 620,000 Pa (6.2 bar)) is released from the derived from the second side 10 of the compressed air cylinder 6 and the pressure on the first side 9 the compressed air cylinder from 0 Pa (0 bar) to a value between about 480 000 Pa (4.8 bar) and 620,000 Pa (6.2 bar).
  • the compressed air cylinder moves due to the pressure build-up 6 the cutting element 7, which contacts and cuts the web 8 in this way.
  • the diagram shown in Fig. 2 shows the relationship between the compressed air structure the first side 9 of the air cylinder 6 and the time that passes until the Cutting element 7 of the device of FIG. 1 contacts and cuts the web 8.
  • the cutting element 7 meets the web 8 before in Air cylinder 6 the maximum pressure of approximately between 480 000 Pa (4.8 bar) and 620,000 Pa (6.2 bar) is reached.
  • the maximum printing speed is the Printing machine limited by the time required to build up pressure.
  • FIG. 3 shows a cutting device 20 according to the invention, which has a first three-way valve 21 with an inflow opening 22 and an outflow opening 23.
  • the Cutting device 20 further comprises a second three-way valve 24 with a Inflow opening 25 and a further inflow / outflow opening 26.
  • the outflow opening 23 of the first valve 21 has an inflow opening 27 of a compressed air cylinder 28 connected and receives a pressure of on the first side 29 of the compressed air cylinder 28 preferably upright between about 480,000 Pa (4.8 bar) and 510,000 Pa (5.1 bar).
  • the An inflow / outflow opening 26 of the second valve 24 is provided with an inflow / outflow opening 30 of the Compressed air cylinder 28 connected and receives at rest on a second side 31 of Air cylinder 28 maintains a pressure of preferably about 620,000 Pa (6.2 bar).
  • the cutting element 7 Due to the pressure on the first side 29 of preferably approximately between The cutting element 7 becomes 480,000 Pa (4.8 bar) and 510,000 Pa (5.1 bar) from the beginning with full force towards the web 8 to be cut, since the pressure on the first side 29 is kept at the maximum over the entire period, so that none More time has to be spent on building up pressure, as is the case with the devices of the prior art is the case. Overall, this results in a reduction in time required to move the cutting element 7 and the guarantee that the knife 11 of the cutting element 7 strikes the web 8 with full force. That way the length of the paper path that the knife 11 passes before the web is cut, and thus the risk of damage to the printing units in the event of a so-called "Wicklers" after a web break significantly reduced.
  • the graph shown in Fig. 4 shows the reduced time due to the increase in initial pressure to about 480,000 Pa (4.8 bar) to 510,000 Pa (5.1 bar) for the Cutting the web 8 through the cutting element 7 when using the device and method according to the invention is required.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Replacement Of Web Rolls (AREA)
  • Control Of Cutting Processes (AREA)
EP00111002A 1999-06-24 2000-05-30 Vorrichtung und Verfahren zum Schneiden von Materialbahnen Expired - Lifetime EP1063087B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/339,725 US6658972B1 (en) 1999-06-24 1999-06-24 Full force web severer
US339725 1999-06-24

Publications (2)

Publication Number Publication Date
EP1063087A1 EP1063087A1 (de) 2000-12-27
EP1063087B1 true EP1063087B1 (de) 2002-10-23

Family

ID=23330324

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00111002A Expired - Lifetime EP1063087B1 (de) 1999-06-24 2000-05-30 Vorrichtung und Verfahren zum Schneiden von Materialbahnen

Country Status (4)

Country Link
US (1) US6658972B1 (ja)
EP (1) EP1063087B1 (ja)
JP (1) JP2001025993A (ja)
DE (2) DE50000668D1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006005121A1 (de) * 2006-02-04 2007-08-09 Peter Mayr Falzwerk einer Druckmaschine mit mindestens einer Steuervorrichtung für Funktionseinheiten

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20319210U1 (de) * 2003-12-11 2004-03-04 Voith Paper Patent Gmbh Vorrichtung zum Trennen einer Materialbahn
US20060174736A1 (en) * 2005-02-10 2006-08-10 Aaron Bloy Slitter knife system and method
EP3741527A1 (en) 2019-05-24 2020-11-25 Poly-clip System GmbH & Co. KG Cutting equipment and clipping machine

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006005121A1 (de) * 2006-02-04 2007-08-09 Peter Mayr Falzwerk einer Druckmaschine mit mindestens einer Steuervorrichtung für Funktionseinheiten

Also Published As

Publication number Publication date
JP2001025993A (ja) 2001-01-30
US6658972B1 (en) 2003-12-09
EP1063087A1 (de) 2000-12-27
DE50000668D1 (de) 2002-11-28
DE10026947A1 (de) 2001-02-22

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