WO2006067260A1 - Method for cutting of paper web - Google Patents

Method for cutting of paper web Download PDF

Info

Publication number
WO2006067260A1
WO2006067260A1 PCT/FI2004/000792 FI2004000792W WO2006067260A1 WO 2006067260 A1 WO2006067260 A1 WO 2006067260A1 FI 2004000792 W FI2004000792 W FI 2004000792W WO 2006067260 A1 WO2006067260 A1 WO 2006067260A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
cutting
substance
sprayed
web
Prior art date
Application number
PCT/FI2004/000792
Other languages
French (fr)
Inventor
Mika Siitonen
Esko Tuori
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
Priority to PCT/FI2004/000792 priority Critical patent/WO2006067260A1/en
Publication of WO2006067260A1 publication Critical patent/WO2006067260A1/en

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
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
    • B24C1/045—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
    • 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

Definitions

  • the invention relates to a method of cutting a paper web by means of an abrasive water jet, in which method the efficiency of the water cutting jet is improved, absorption of water into the paper is reduced and removal of water splash and water fog from the intersection is improved
  • the presented problem is solved and the intention of the new method is to prevent water from absorbing into the cutting edge of the web and to ease removal of splash from the web surface.
  • the method according to the invention is characterized in that on the paper web surface, at least to the intended cutting line, substance is sprayed that changes the quality of the paper surface, and which stays on said surface.
  • the advantage of the invention is that at the intersection the web surface can be made water-repellent or otherwise such a surface, where the cutting jet makes a sharp cut without removing hardly any useless material, which as splash would spread on the web surface. Also the splash itself becomes less according to the solution of the invention.
  • both web surfaces at the intersection, and a little outside, is treated in a way as per the invention, in the cutting edges of the web only a very low portion remains, from which the water can absorb into the web fibres. This dampness on the web portion does not anymore have effect in rolling situation, since the treated line on the surface of the web edges gets always in contact with the corresponding line from the former cycle, which by rolling does not cause the edges to stick together.
  • FIG. 1 shows a device 6, by means of which the substance according to the invention is sprayed on line L of the web surface and a little on its both sides forming line 5.
  • Device 6 is a nozzle or it can also be an atomizer, a wiper, a drag, a rotating feed roll etc.
  • the substance itself that is sprayed on line 5 is of such kind, which on the web surface forms a water repellent surface, whereby water drops onto the surface.
  • Such substances are, among others, substances containing oil, paraffin, silicones, latex, polymers, as PVA, butadiene styrene or fluoric polymers and UV-hardened polymers. These materials are sprayed as fluid to the web surface.
  • the substances can be two-component substances, whereby the components react quickly before cutting device 3. Both components can be fluid.
  • the other component can also be air or special gas which can be sprayed on the line.
  • line 5 can, for instance, by means of special devices heated, cooled, protected by means of a gas screen, be sprayed with reactive gas, UV- radiated or given other radiation. These because the substance sprayed on line 5 would quickly form a wanted coat or in some other way change the surface quality on line 5.
  • the coat formed on line 5 must not necessarily be water repellent, it can also be waterproof, whereby it carries the water drops, splash etc. and prevent water from absorbing into the paper fibres.
  • the waterproof coat or surface can be achieved mainly using substances of same substance groups presented above in order to form a water repellent surface.
  • Figure 1 shows for this purpose a blowing device?, the blowing nozzle part of which is directed to blow water off the web against the edge.
  • the outcome of water jet cutting can be improved adding to the cutting liquid, usually to water, some emulsion-additive, as polymer. This causes growth of the water surface tension and also increases the specific weight. Because of said additive absorption of substance into the fibres reduces, as reduces also the splash.
  • the cutting effect also grows and the nozzle and even water consumption can be made smaller.
  • the method according to the invention is suited for paper web cutting in any place of the web, since the blast after cutting can be done together with the collecting unit, which sucks blasted waters, splash and blast air.

Abstract

A method for cutting of a paper web (1) by means of an abrasive water jet (4), in which method the effectiveness of water cutting is improved, absorption of cutting water into paper (1) reduced and removal of water splash and fog from the intersection. Improved. In the method on the paper web surface, at least to intended cutting line (L), substance that changes the quality of the paper surface is sprayed, which substance remains on said surface.

Description

METHOD FOR CUTTING OF PAPER WEB
The invention relates to a method of cutting a paper web by means of an abrasive water jet, in which method the efficiency of the water cutting jet is improved, absorption of water into the paper is reduced and removal of water splash and water fog from the intersection is improved
Generally paper has been cut by means of a high pressure jet. In these cuttings the disadvantage has been absorption of cutting water into the edges of cut webs and further from there some millimetres sideways in the web. When the web after cutting has been rolled to a paper roll the moist edges of the roll have stuck together. After cutting it has been tried to remove the moist off the edge by means of blasting and heating. Due to the very short time available between cutting and rolling it has not been possible to remove from the web edge the moisture that has got into the paper. Nor have it been possible to find a solution, by means of which absorption of water into the web could be avoided.
By means of the method according to the invention the presented problem is solved and the intention of the new method is to prevent water from absorbing into the cutting edge of the web and to ease removal of splash from the web surface. The method according to the invention is characterized in that on the paper web surface, at least to the intended cutting line, substance is sprayed that changes the quality of the paper surface, and which stays on said surface.
The other embodiments according to the invention are characterized in what is presented in the independent claims.
The advantage of the invention is that at the intersection the web surface can be made water-repellent or otherwise such a surface, where the cutting jet makes a sharp cut without removing hardly any useless material, which as splash would spread on the web surface. Also the splash itself becomes less according to the solution of the invention. When both web surfaces at the intersection, and a little outside, is treated in a way as per the invention, in the cutting edges of the web only a very low portion remains, from which the water can absorb into the web fibres. This dampness on the web portion does not anymore have effect in rolling situation, since the treated line on the surface of the web edges gets always in contact with the corresponding line from the former cycle, which by rolling does not cause the edges to stick together.
In the following the method according to the invention is disclosed with reference to the enclosed drawing, 1 which shows the moving web and the water jet cutting device and implementation of the method according to the invention.
In figure 1 the paper moves from the right to the left and by means of jet 4 caused by water jet cutting device 3 and edge line 2 is cut off web 1. On line L the intended cutting line is illustrated before cutting jet 4. The web to be cut is usually broad, several metres and stable sideways. Thus cutting line L is accurately calculable already several metres before cutting device 3.
In the method according to the invention from the surface such a line 5 is treated, for which cutting takes place in cutting situation. Also a line on the web underside in the corresponding spot can be treated in the same way. As width for line 5 about 3-6 mm is chosen and the aim of cutting is to hit almost the middle of the line. The length of line 5 from the front side of the cutting spot is chosen so that the substance sprayed on line 5 can achieve the intended properties before it is at cutting device 3. Figure 1 shows a device 6, by means of which the substance according to the invention is sprayed on line L of the web surface and a little on its both sides forming line 5. Device 6 is a nozzle or it can also be an atomizer, a wiper, a drag, a rotating feed roll etc.
The substance itself that is sprayed on line 5 is of such kind, which on the web surface forms a water repellent surface, whereby water drops onto the surface. Such substances are, among others, substances containing oil, paraffin, silicones, latex, polymers, as PVA, butadiene styrene or fluoric polymers and UV-hardened polymers. These materials are sprayed as fluid to the web surface. The substances can be two-component substances, whereby the components react quickly before cutting device 3. Both components can be fluid. The other component can also be air or special gas which can be sprayed on the line. So that the substance to be sprayed on line 5 would on the web surface achieve quickly enough the properties wanted, line 5 can, for instance, by means of special devices heated, cooled, protected by means of a gas screen, be sprayed with reactive gas, UV- radiated or given other radiation. These because the substance sprayed on line 5 would quickly form a wanted coat or in some other way change the surface quality on line 5.
The coat formed on line 5 must not necessarily be water repellent, it can also be waterproof, whereby it carries the water drops, splash etc. and prevent water from absorbing into the paper fibres. The waterproof coat or surface can be achieved mainly using substances of same substance groups presented above in order to form a water repellent surface.
When line 5 is coated or treated according to the invention it is possible after cutting to blow water and water splash from the surface by means of an air jet. Figure 1 shows for this purpose a blowing device?, the blowing nozzle part of which is directed to blow water off the web against the edge.
In addition to web treating the outcome of water jet cutting can be improved adding to the cutting liquid, usually to water, some emulsion-additive, as polymer. This causes growth of the water surface tension and also increases the specific weight. Because of said additive absorption of substance into the fibres reduces, as reduces also the splash.
The cutting effect also grows and the nozzle and even water consumption can be made smaller.
The method according to the invention is suited for paper web cutting in any place of the web, since the blast after cutting can be done together with the collecting unit, which sucks blasted waters, splash and blast air.

Claims

1. A method for cutting of a paper web (1) by means of an abrasive water jet (4), in which method the effectiveness of water cutting is improved, absorption of cutting water into paper (1) reduced and removal of water splash and water fog from the intersection is improved, characterized in that in the method on the paper web surface, at least to intended cutting line (L), substance that changes the quality of the paper surface is sprayed, which substance remains on said surface.
2. A method according to claim 1, characterized in that on the surface substance is sprayed, which to its properties is water repellent.
3. A method according to claim 1, characterized in that on the surface substance is sprayed that forms a layer meant to be water impermeable.
4. A method according to claim 1, characterized in that on the surface substance is sprayed that causes dripping of the water on the surface.
5. A method according to claim 1, characteriz e d in that after cutting splash/drops are blasted off intersection (L).
6. A method according to claim 1, characterized in that the substance to be sprayed on the surface is to be steered to line (L) and next to it so far before cutting jet (4) so that it has been able to achieve the properties wanted on arriving at cutting jet (4), either by means of the effects of equipment activating different reactions or by means of the effects of the substances.
7. A method according to claim 1, characterized in that water cutting is carried out with liquid mixed with fixative in order to emulate water with the aim to reduce the formation of water splash and fog.
8. A method according to claim 1, characterized in that substance improving the surface quality is sprayed to the upper and the lower part of the web.
PCT/FI2004/000792 2004-12-23 2004-12-23 Method for cutting of paper web WO2006067260A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI2004/000792 WO2006067260A1 (en) 2004-12-23 2004-12-23 Method for cutting of paper web

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2004/000792 WO2006067260A1 (en) 2004-12-23 2004-12-23 Method for cutting of paper web

Publications (1)

Publication Number Publication Date
WO2006067260A1 true WO2006067260A1 (en) 2006-06-29

Family

ID=36601421

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2004/000792 WO2006067260A1 (en) 2004-12-23 2004-12-23 Method for cutting of paper web

Country Status (1)

Country Link
WO (1) WO2006067260A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8268429B2 (en) 2010-06-21 2012-09-18 The Procter & Gamble Company Perforated web product
US8283013B2 (en) 2010-06-21 2012-10-09 The Procter & Gamble Company Uniquely perforated web product
US8287976B2 (en) 2010-06-21 2012-10-16 The Procter & Gamble Company Uniquely perforated web product
US8287977B2 (en) 2010-06-21 2012-10-16 The Procter & Gamble Company Uniquely perforated web product
US8443725B2 (en) 2010-06-21 2013-05-21 The Procter & Gamble Company Method of perforating a web
US8468938B2 (en) 2010-06-21 2013-06-25 The Procter & Gamble Company Apparatus for perforating a web material
US8535483B2 (en) 2010-06-21 2013-09-17 The Procter & Gamble Company Apparatus for uniquely perforating a web material
US8757058B2 (en) 2010-06-21 2014-06-24 The Procter & Gamble Company Process for perforating a web
US8763526B2 (en) 2010-06-21 2014-07-01 The Procter & Gamble Company Apparatus for perforating a web material
US8763523B2 (en) 2010-06-21 2014-07-01 The Procter & Gamble Company Method of perforating a web material
US9259848B2 (en) 2010-06-21 2016-02-16 The Procter & Gamble Company Method for providing a web with unique lines of weakness

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3532014A (en) * 1968-10-01 1970-10-06 Norman C Franz Method for the high velocity liquid jet cutting of soft materials
EP0870583A2 (en) * 1997-04-07 1998-10-14 Roman C. Caspar Water jet edge trimming station for use in papermaking machine
US6106049A (en) * 1996-03-21 2000-08-22 Bernhard Mittelhauser Tank for covering the tank socket of vehicle fuel tanks

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3532014A (en) * 1968-10-01 1970-10-06 Norman C Franz Method for the high velocity liquid jet cutting of soft materials
US6106049A (en) * 1996-03-21 2000-08-22 Bernhard Mittelhauser Tank for covering the tank socket of vehicle fuel tanks
EP0870583A2 (en) * 1997-04-07 1998-10-14 Roman C. Caspar Water jet edge trimming station for use in papermaking machine

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8268429B2 (en) 2010-06-21 2012-09-18 The Procter & Gamble Company Perforated web product
US8283013B2 (en) 2010-06-21 2012-10-09 The Procter & Gamble Company Uniquely perforated web product
US8287976B2 (en) 2010-06-21 2012-10-16 The Procter & Gamble Company Uniquely perforated web product
US8287977B2 (en) 2010-06-21 2012-10-16 The Procter & Gamble Company Uniquely perforated web product
US8443725B2 (en) 2010-06-21 2013-05-21 The Procter & Gamble Company Method of perforating a web
US8468938B2 (en) 2010-06-21 2013-06-25 The Procter & Gamble Company Apparatus for perforating a web material
US8535483B2 (en) 2010-06-21 2013-09-17 The Procter & Gamble Company Apparatus for uniquely perforating a web material
US8757058B2 (en) 2010-06-21 2014-06-24 The Procter & Gamble Company Process for perforating a web
US8763526B2 (en) 2010-06-21 2014-07-01 The Procter & Gamble Company Apparatus for perforating a web material
US8763523B2 (en) 2010-06-21 2014-07-01 The Procter & Gamble Company Method of perforating a web material
US9259848B2 (en) 2010-06-21 2016-02-16 The Procter & Gamble Company Method for providing a web with unique lines of weakness

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