EP1007280A1 - A method and apparatus for cutting the edge of a moving paper web - Google Patents

A method and apparatus for cutting the edge of a moving paper web

Info

Publication number
EP1007280A1
EP1007280A1 EP95931239A EP95931239A EP1007280A1 EP 1007280 A1 EP1007280 A1 EP 1007280A1 EP 95931239 A EP95931239 A EP 95931239A EP 95931239 A EP95931239 A EP 95931239A EP 1007280 A1 EP1007280 A1 EP 1007280A1
Authority
EP
European Patent Office
Prior art keywords
web
cutting
edge
blast
water jet
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.)
Granted
Application number
EP95931239A
Other languages
German (de)
French (fr)
Other versions
EP1007280B1 (en
Inventor
Esko Tuori
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.)
ES-Systems Oy
Original Assignee
ES-Systems Oy
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 ES-Systems Oy filed Critical ES-Systems Oy
Publication of EP1007280A1 publication Critical patent/EP1007280A1/en
Application granted granted Critical
Publication of EP1007280B1 publication Critical patent/EP1007280B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/006—Cutting the edges of the paper-web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1845—Means for removing cut-out material or waste by non mechanical means
    • B26D7/1854—Means for removing cut-out material or waste by non mechanical means by air under pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/20—Cutting beds
    • 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
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • 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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D2007/0012—Details, accessories or auxiliary or special operations not otherwise provided for
    • B26D2007/0068—Trimming and removing web edges

Definitions

  • Advantages of the present invention can be considered that it is possible to generate enough counterforces in the web edge in order to compensate the inconvenient forces on the web by the water jet.
  • Cutting can be carried out in dried and even in coated paper web moving even faster than 20 m/s.
  • the cutted edge can be easily after-treated, since after cutting the position of edge is stable on utilizing the method and appa ⁇ ratus as per this invention are utilized. In the following the invention is disclosed with reference to the enclosed drawing.
  • Fig. 1 is a diagonal view of the apparatus.
  • Fig. 2 is a side view of the apparatus.
  • Fig. 3 is a cutting top.
  • FIG 1 the paper web moves from the right to the left and a strip 2 is cut off from its edge.
  • a strip 2 is cut off from its edge.
  • the cut off strip 2 is steered to a channel 11, into which an air flow to transport the edge strip is produced, which secures conveyance of strip out from channel.
  • a control device with a photocell observing faulty motions of strip 2, for instance its getting conveyed along with web 1, whereat different functions go off, e.g. air blasts, striving to steer strip 2 into channel 11 and, in case it does not work, finally nozzle 3 is pulled aside and cutting of edge strip swithed off. Conveyance of strip 2 along with web 1 causes an immediate line break possibility and efforts must be made to prevent such a possibility by means of safety devices.
  • Cutting water is conveyed to nozzle 3 along piping 6.
  • the whole apparatus rests on a bearer 7 and the cutting line is adjusted moving the bearer sideways.
  • an after-treatment device is installed consisting of after-treatment pieces 9 and 10 installed on both sides of the web at the edge.
  • After-treatment pieces 9 and 10 there are sharp edges directed against the arriving web to sweep off portions that swell too much from the web surface.
  • about from the middle of these pieces air is blasted into the space between the pieces and the web in order to prevent full gliding contact.
  • the direction of the air blast into the space between a piece and the web is turned mildly out off the web, whereby the blast residue goes to channel 11.
  • compressed air is brought to the apparatus.
  • the lower piece 10 is fixed to cutting top 4, the upper piece 9 attached to the apparatus.
  • the after-treatment equipment is resiliently attached to beam 7 (not shown) so that the appa ⁇ ratus is freely suspended by piece 9 above the web almost without any friction on an air cushion formed beneath piece 9.
  • the web edge is dried by means of an infrared radiator 12, by means of which possible water jet moisture is lessesned.
  • Figure 2 shows a side view of the complete apparatus with a sectional view of a part of channel 11. Web 1 travels above cutting top 4 almost touching this cutting top 4. cutting and after-treatment take place above the channel 11 orifice.
  • Figure 3 shows the cutting table, which is a top level 4 and most significant for the water jet cutting to work well, and most appropriately placed under the web at the cutting point.
  • Water penetrating web 1 is conveyed out through a hole 14.
  • the lower after-treatment piece 10 is placed in hole 18.
  • On the cutting top underside surface there is a L-formed channel 13 into which compressed air is conveyed. From channel 13 compressed air has access to flow out from the underside of lath 16 and along furrows 17 diagonally with respect to the web forward travel.
  • the furrows 17 are separated from one another by ridges 15. When compressed air in furrows 17 flows faster than the web and since it can be discharged into a larger space, i.e. to the outside, negative pressure is generated in the furrows pulling web 1 toward cutting top 4.
  • the simul ⁇ taneous direction sideways and forward chosen for the furrows produces forces of proper direction into the web compensating the forces generated by the water et, due to which the web travel would otherwise be disturbed.
  • the compensation forces formed by cutting top 4 are necessary for the web to endure continuous water jet cutting, without trouble, at usually applied speeds.
  • the after-treatment equipment as per embodiments shown in figures 1 and 2 is imerative for reliable cutting operation and its necessity depends on the web quality. When cutting dried paper web this equipment is needed for dusting and for cleaning the coating material and the web edge. Particles hovering in the air may not even begin to accumulate on the surface of the cutting equipment, since they could before long reach into contact with the web and cause interruption in web travel. Dusts and water mist must therefore be blasted or sucked off the cutting point if one wants to secure a reliable long-run function.
  • Cutting top 4 is shown from the web underside only, it can be located on both sides of the web. Most advatageously the cutting top is made of strong material or coated with such material. After-treatment devices 9,1°,12 may be needed either on one side only or on both sides of the web.

Abstract

A method for longitudinal cutoff of edge (2) of moving paper web (1), where cutting is carried out by a water jet through the web. In the cutting point (14), vicinity forces are generated in the web (1) in the direction of the web cutting top in order to pull the web forward and towards the edge.

Description

A METHOD AND APPARATUS FOR CUTTING THE EDGE OF A
MOVING PAPER WEB
This method relates to edge cutting of paper web in accordance with the introduction of patent claim 1.
Previously known from Finnish patent 12457 is edge cutting by a water jet. From the Finnish publications 83106 and 88417 diagonal cutting of paper web is known, i.e. in the first place longitudinal cut off by means of a water jet.
The construction as per patent 12457 can be applied when the paper web speed is slow and cutting carried out close to the wet end. Then the forces generated by cutting hardly have any impact on the web forward travel. Instead, cutting of dry paper has turned out to be difficult by growing web speeds. Especially, on coating the paper, the edge arrives at cutting only after coating, whereat the uneven edge margin with the coating border is removed. After coating, due to cutting, the advancing web is equal in quality up to the edge. It has been established that a high-speed water jet produces in the edge of a fast moving web braking powers preventing the use of a water jet cutter. The web proceeds undeter inately and the possibility of breaks in the line grows.
With a method and an apparatus according to this invention the above introduced problem has been settled and the invention is characterized in what is presented in the patent claims.
Advantages of the present invention can be considered that it is possible to generate enough counterforces in the web edge in order to compensate the inconvenient forces on the web by the water jet. Cutting can be carried out in dried and even in coated paper web moving even faster than 20 m/s. The cutted edge can be easily after-treated, since after cutting the position of edge is stable on utilizing the method and appa¬ ratus as per this invention are utilized. In the following the invention is disclosed with reference to the enclosed drawing.
Fig. 1 is a diagonal view of the apparatus.
Fig. 2 is a side view of the apparatus.
Fig. 3 is a cutting top.
In figure 1 the paper web moves from the right to the left and a strip 2 is cut off from its edge. For cutting a high-speed water jet is used, the nozzle portion 3 of which is very close, appr. at 1 mm distance from web 1. The cut off strip 2 is steered to a channel 11, into which an air flow to transport the edge strip is produced, which secures conveyance of strip out from channel. At the channel 11 mouth (not shown) is a control device with a photocell observing faulty motions of strip 2, for instance its getting conveyed along with web 1, whereat different functions go off, e.g. air blasts, striving to steer strip 2 into channel 11 and, in case it does not work, finally nozzle 3 is pulled aside and cutting of edge strip swithed off. Conveyance of strip 2 along with web 1 causes an immediate line break possibility and efforts must be made to prevent such a possibility by means of safety devices.
Cutting water is conveyed to nozzle 3 along piping 6. The whole apparatus rests on a bearer 7 and the cutting line is adjusted moving the bearer sideways.
Along pipe 5 the air jet is guided to the cutting spot, whereat cutting dust and coating peeling off the paper and coating dust are conveyed to channel 11 and into the channel by suction. On the cutting line an after-treatment device is installed consisting of after-treatment pieces 9 and 10 installed on both sides of the web at the edge. In pieces 9,10 there are sharp edges directed against the arriving web to sweep off portions that swell too much from the web surface. Further, about from the middle of these pieces air is blasted into the space between the pieces and the web in order to prevent full gliding contact. The direction of the air blast into the space between a piece and the web is turned mildly out off the web, whereby the blast residue goes to channel 11. Along pipe 8 compressed air is brought to the apparatus. The lower piece 10 is fixed to cutting top 4, the upper piece 9 attached to the apparatus. The after-treatment equipment is resiliently attached to beam 7 (not shown) so that the appa¬ ratus is freely suspended by piece 9 above the web almost without any friction on an air cushion formed beneath piece 9. The web edge is dried by means of an infrared radiator 12, by means of which possible water jet moisture is lessesned.
Figure 2 shows a side view of the complete apparatus with a sectional view of a part of channel 11. Web 1 travels above cutting top 4 almost touching this cutting top 4. cutting and after-treatment take place above the channel 11 orifice.
Figure 3 shows the cutting table, which is a top level 4 and most significant for the water jet cutting to work well, and most appropriately placed under the web at the cutting point. Water penetrating web 1 is conveyed out through a hole 14. The lower after-treatment piece 10 is placed in hole 18. On the cutting top underside surface there is a L-formed channel 13 into which compressed air is conveyed. From channel 13 compressed air has access to flow out from the underside of lath 16 and along furrows 17 diagonally with respect to the web forward travel. The furrows 17 are separated from one another by ridges 15. When compressed air in furrows 17 flows faster than the web and since it can be discharged into a larger space, i.e. to the outside, negative pressure is generated in the furrows pulling web 1 toward cutting top 4. The simul¬ taneous direction sideways and forward chosen for the furrows produces forces of proper direction into the web compensating the forces generated by the water et, due to which the web travel would otherwise be disturbed. The compensation forces formed by cutting top 4 are necessary for the web to endure continuous water jet cutting, without trouble, at usually applied speeds. The after-treatment equipment as per embodiments shown in figures 1 and 2 is imerative for reliable cutting operation and its necessity depends on the web quality. When cutting dried paper web this equipment is needed for dusting and for cleaning the coating material and the web edge. Particles hovering in the air may not even begin to accumulate on the surface of the cutting equipment, since they could before long reach into contact with the web and cause interruption in web travel. Dusts and water mist must therefore be blasted or sucked off the cutting point if one wants to secure a reliable long-run function.
Cutting top 4 is shown from the web underside only, it can be located on both sides of the web. Most advatageously the cutting top is made of strong material or coated with such material. After-treatment devices 9,1°,12 may be needed either on one side only or on both sides of the web.

Claims

PATENT CLAIMS
l.A method for longitudinal cut off of the edge (2) of moving paper web or similar coated web (1), where cutting is carried out by a water jet through the web and the web is supported at least from one side in the cutting point, characterized in that the web is supported by a cutting top installed into contact with the web and forcible blast is directed into the space between the web and the cutting top in order to generate forces in the web cutting top direction for pulling the web forward and toward the edge.
2. A method according to patent claim 1 characterized in that air is blasted by a speed higher than the web (1) speed.
3. A method according to patent claim 1 characterized in that the blast is steered by means of guides (15) in cutting top (4) surface.
4. A method according to any of the above patent claims 1 - 3 characterized in that removal of the edge strip (2) is facilitated by a blast generated in discharge channel (11) and faster than the strip (2) travel speed.
5. An apparatus for cut off of the edge of moving paper web or similar coated web (1), where cutting is carried out by a water jet through the web using a water jet nozzle (3) arranged at the cutting point (14) close to the web surface and where the web is supported at least from one side of the cutting point vicinity, characterized in that the apparatus has as supporting means a cutting (4) top in line with the web and installed into contact with the web, a blast channel system (13) for conveying air into the space between the cutting top (4) and the web, and guides 15 on the cutting top (4) surface to steer the blast in the web direction diagonally towards the web edge.
6. An apparatus according to patent claim 5 characterized in that it has a suction duct (11) for removal of the cut off strip.
7. An apparatus according to patent claim 6 or 7 characterized in that the most part of cutting top (4) is after the cutting point (14) in line with the web.
EP95931239A 1994-03-31 1995-09-26 A method and apparatus for cutting the edge of a moving paper web Expired - Lifetime EP1007280B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI941505A FI98346C (en) 1994-03-31 1994-03-31 Method and apparatus for cutting a moving paper web edge
PCT/FI1995/000523 WO1997011814A1 (en) 1994-03-31 1995-09-26 A method and apparatus for cutting the edge of a moving paper web

Publications (2)

Publication Number Publication Date
EP1007280A1 true EP1007280A1 (en) 2000-06-14
EP1007280B1 EP1007280B1 (en) 2002-12-11

Family

ID=26159702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95931239A Expired - Lifetime EP1007280B1 (en) 1994-03-31 1995-09-26 A method and apparatus for cutting the edge of a moving paper web

Country Status (3)

Country Link
EP (1) EP1007280B1 (en)
FI (1) FI98346C (en)
WO (1) WO1997011814A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT15393U1 (en) * 2015-02-18 2017-08-15 Valmet Technologies Inc Arrangement when treating a marginal strip of a drying machine for pulp

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Publication number Priority date Publication date Assignee Title
CA2201990C (en) * 1997-04-07 2005-10-18 Roman C. Caspar Water jet edge trimming station for use in papermaking machine
DE10001816C1 (en) * 1999-11-13 2001-06-21 Erhardt & Leimer Gmbh Device and method for guiding a cross-stable web
FI110256B (en) * 2000-03-16 2002-12-31 Metso Paper Inc Method of cutting edge strips of a continuous web
DE10017288A1 (en) 2000-04-06 2001-10-31 Koenig & Bauer Ag Device for cutting paper webs
FI112180B (en) * 2000-08-22 2003-11-14 Upm Kymmene Corp Method and apparatus for cutting the edge of the paper web
FI115203B (en) 2000-10-02 2005-03-31 Metso Paper Inc Apparatus for cutting in particular a paper web with water jet
BR0114211A (en) * 2000-10-19 2003-10-21 Metso Paper Karlstad Ab Protective arrangement for cutting equipment for splitting a continuous sheet of cardboard machine fiber or paper to manufacture a continuous sheet of fiber
DE10217723A1 (en) 2002-04-20 2003-10-30 Voith Paper Patent Gmbh Water jet cutting device
FI116664B (en) 2004-06-18 2006-01-31 Metso Paper Inc Method and apparatus of a paper or cardboard machine
DE102005018769A1 (en) * 2005-04-22 2006-10-26 Voith Patent Gmbh cutter
DE102005018767A1 (en) * 2005-04-22 2006-10-26 Voith Patent Gmbh cutter
DE102007042025B4 (en) 2007-09-05 2018-12-20 Windmöller & Hölscher Kg Device and method for guiding a material web
CN108582261A (en) * 2018-05-22 2018-09-28 徐州工程学院 A kind of carbon tetrachloride precipitation block cutter device

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FR2553330B1 (en) * 1983-10-17 1988-04-22 Aerospatiale HIGH PRESSURE FLUID JET MATERIAL CUTTING MACHINE
US4505412A (en) * 1983-10-31 1985-03-19 Crown Zellerbach Corporation Pneumatic conveyor system for flexible webs
DE3667955D1 (en) * 1986-06-25 1990-02-08 Oerlikon Motch Corp AIR CONVEYOR FOR PLASTIC FILMS.
FI92608C (en) * 1992-09-01 1994-12-12 Metsae Serla Oy Method and apparatus for cutting the edge strip of a fibrous web

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT15393U1 (en) * 2015-02-18 2017-08-15 Valmet Technologies Inc Arrangement when treating a marginal strip of a drying machine for pulp

Also Published As

Publication number Publication date
FI941505A (en) 1995-10-01
WO1997011814A1 (en) 1997-04-03
FI98346C (en) 1997-06-10
EP1007280B1 (en) 2002-12-11
FI941505A0 (en) 1994-03-31
FI98346B (en) 1997-02-28

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