EP1063087B1 - Vorrichtung und Verfahren zum Schneiden von Materialbahnen - Google Patents
Vorrichtung und Verfahren zum Schneiden von Materialbahnen Download PDFInfo
- 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
Links
Images
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)
Description
- Fig. 1
- ein schematisches Blockdiagramm einer Schneidevorrichtung des Standes der Technik;
- Fig. 2
- ein Schaubild, das den Druckaufbau an einer Seite eines Druckluftzylinders und die Zeit bis zum Kontaktieren der Materialbahn durch das Schneideelement in einer Schneidevorrichtung des Standes der Technik aufzeigt;
- Fig. 3
- ein schematisches Blockdiagramm einer bevorzugten Ausführungsform der erfindungsgemäßen Schneidevorrichtung; und
- Fig. 4
- ein Schaubild, das den Druck in einem Druckluftzylinder und die Zeit bis zum Kontaktieren der Materialbahn aufzeigt.
- F =
- m·a (1);und
- F =
- P·A (2); wobei
- F =
- Kraft
- m =
- Masse des Schneideelements 7,
- a =
- Beschleunigung des Schneideelements 7,
- P =
- momentan verfügbarer Luftdruck,
- A =
- Fläche des Luftdruckzylinders 28,
- X =
- Schlaglänge zwischen dem Druckluftzylinder 28 und der Bahn 8
- t =
- Schlagzeit
- 1
- Schneidevorrichtung des Standes der Technik
- 2
- Vierwege-Ventil
- 3
- Druckluft-Einströmöffnung
- 4
- Druckluft-Ausströmöffnung
- 5
- Druckluft-Ein/Ausströmöffnung
- 6
- Druckluftzylinder
- 7
- Schneideelement
- 8
- Materialbahn
- 9
- erste Seite des Druckluftzylinders
- 10
- zweite Seite des Druckluftzylinders
- 11
- Messer
- 20
- erfindungsgemäße Bahnschneidevorrichtung
- 21
- erstes Dreiwege-Ventil
- 22
- Druckluft-Einströmöffnung
- 23
- Druckluft-Ausströmöffnung
- 24
- zweites Dreiwege-Ventil
- 25
- Druckluft-Einströmöffnung
- 26
- Druckluft-Ein/Ausströmöffnung
- 27
- Einströmöffnung des Druckluftzylinders
- 28
- Druckluftzylinder
- 29
- erste Seite des Druckluftzylinders
- 30
- Ein/Ausströmöffnung des Druckluftzylinders
- 31
- zweite Seite des Druckluftzylinders
- 32
- Steuerungseinheit
- 33
- Schnellausströmventil
Claims (12)
- Vorrichtung zum Schneiden von Materialbahnen, mit einem Druckluftzylinder (28) mit einer ersten Seite (29) und einer zweiten Seite (31), einem mit der ersten Seite (29) des Druckluftzylinders (28) verbundenen ersten Ventil (21), einem mit der zweiten Seite (24) des Druckluftzylinders (28) verbundenen zweiten Ventil (24) und mit einem Schneidelement,
dadurch gekennzeichnet, dass das erste Ventil (21) die erste Seite (29) des Druckluftzylinders (28) in einem nicht-schneidenden Zustand des Druckluftzylinders (28) mit einem ersten vorgegebenen Druck beaufschlagt,
dass das zweite Ventil (24) in dem nicht-schneidenden Zustand des Druckluftzylinders (28) die zweite Seite (31) mit einem zweiten vorgegebenen Druck beaufschlagt, der größer ist als der erste vorgegebene Druck, und dass der zweite vorgegebene Druck zur Einleitung eines Schneidevorgangs am Schneidezylinder (28) auf einen Wert unter dem ersten vorgegebenen Druck reduzierbar ist. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, dass das mit dem Druckluftzylinder (28) verbundene und von diesem angetriebene Schneideelement (7) zum Durchtrennen einer Materialbahn (8) vorgesehen ist. - Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet, dass das erste Ventil (21) und das zweite Ventil (24) als Dreiwege-Ventile ausgebildet sind. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der erste vorgegebene Druck etwa zwischen 480 000 Pa (4,8 bar) und 510 000 Pa (5,1 bar), liegt und der zweite vorgegebene Druck größer oder gleich etwa 620 000 Pa (6,2 bar) ist. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass zur Steuerung des ersten und zweiten vorgegebenen Drucks eine mit dem Druckluftzylinder (28) sowie mit dem ersten und zweiten Ventil (21, 24) verbundene Steuerungseinheit (32) vorgesehen ist, mittels derer der Übergang des Druckluftzylinders (28) vom nicht-schneidenden Zustand zum Schneidevorgang steuerbar ist. - Vorrichtung nach einem der Ansprüche 2 bis 5,
dadurch gekennzeichnet, dass das Schneideelement (7) zum Durchtrennen der Bahn (8) ein Messer (11) umfasst. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der Druckluftzylinder (28) zur schnellen Reduzierung des zweiten vorgegebenen Drucks auf einen Wert unter dem ersten vorgegebenen Druck ein mit der zweiten Seite (31) des Druckluftzylinders (28) verbundenes Schnellausströmventil (33) umfasst. - Verfahren zum Schneiden von Materialbahnen, welches das Vorsehen eines Druckluftzylinders (28) mit einer ersten und einer zweiten Seite (29, 31) und das Vorsehen eines mit der ersten Seite (29) verbundenen ersten Ventils (21) und eines mit der zweiten Seite (31) verbundenen zweiten Ventils (24) umfasst,
gekennzeichnet durch
die folgenden Schritte:a) Beaufschlagen der ersten Seite (29) des ein Schneideelement (7) antreibenden Druckluftzylinders (28) in einem nicht-schneidenden Zustand des Druckluftzylinders (28) mit einem ersten vorgegebenen Druck;b) Beaufschlagen der zweiten Seite (31) des Druckluftzylinders (28) im nicht-schneidenden Zustand mit einem zweiten vorgegebenen Druck, der höher ist als der erste vorgegebene Druck, wobei das Schneidelement (7) in seiner Ruhestellung verharrt, solange der zweite vorgegebene Druck größer ist als der erste vorgegebene Druck; undc) Reduzieren des zweiten vorgegebenen Drucks auf einen Wert unter dem ersten vorgegebenen Druck innerhalb kurzer Zeit zur Einleitung eines Schneidevorgangs am Druckluftzylinder (28), in der Weise, dass das Schneideelement (7) bewegt wird und die Materialbahn (8) durchtrennt. - Verfahren nach Anspruch 8,
dadurch gekennzeichnet, dass für jeden Schneidevorgang die Schritte b) und c) wiederholt werden. - Verfahren nach Anspruch 8 oder 9,
dadurch gekennzeichnet, dass zur Steuerung des ersten und zweiten vorgegebenen Drucks sowie des Übergangs zwischen dem Schneidevorgang und dem nicht-schneidenden Vorgang eine Steuervorrichtung (32) vorgesehen ist, die Steuersignale aussendet, die vom Druckluftzylinder (28) empfangen werden. - Verfahren nach Anspruch 10,
dadurch gekennzeichnet, dass zur Erzeugung des ersten vorgegebenen Drucks das erste Ventil (21) und zur Erzeugung des zweiten vorgegebenen Drucks das zweite Ventil (24) mittels von der Steuerungseinheit (32) ausgesendeter Steuersignale gesteuert werden. - Verfahren nach einem der Ansprüche 8 bis 11,
dadurch gekennzeichnet, dass zum schnellen Reduzieren des zweiten vorgegebenen Drucks in Schritt c) ein Schnellausströmventil (33) eingesetzt wird.
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 (de) |
EP (1) | EP1063087B1 (de) |
JP (1) | JP2001025993A (de) |
DE (2) | DE10026947A1 (de) |
Cited By (1)
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)
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 (de) | 2019-05-24 | 2020-11-25 | Poly-clip System GmbH & Co. KG | Schneidausrüstung und clipmaschine |
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-
1999
- 1999-06-24 US US09/339,725 patent/US6658972B1/en not_active Expired - Fee Related
-
2000
- 2000-05-30 EP EP00111002A patent/EP1063087B1/de not_active Expired - Lifetime
- 2000-05-30 DE DE10026947A patent/DE10026947A1/de not_active Withdrawn
- 2000-05-30 DE DE50000668T patent/DE50000668D1/de not_active Expired - Lifetime
- 2000-06-26 JP JP2000191013A patent/JP2001025993A/ja active Pending
Cited By (1)
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 |
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EP1063087A1 (de) | 2000-12-27 |
DE10026947A1 (de) | 2001-02-22 |
JP2001025993A (ja) | 2001-01-30 |
US6658972B1 (en) | 2003-12-09 |
DE50000668D1 (de) | 2002-11-28 |
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