WO2004018337A1 - Dispositif relie a un dispositif de raccordement permettant le deroulement continu d'une nappe fibreuse, en particulier une bande de papier ou de carton - Google Patents

Dispositif relie a un dispositif de raccordement permettant le deroulement continu d'une nappe fibreuse, en particulier une bande de papier ou de carton Download PDF

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Publication number
WO2004018337A1
WO2004018337A1 PCT/FI2003/000609 FI0300609W WO2004018337A1 WO 2004018337 A1 WO2004018337 A1 WO 2004018337A1 FI 0300609 W FI0300609 W FI 0300609W WO 2004018337 A1 WO2004018337 A1 WO 2004018337A1
Authority
WO
WIPO (PCT)
Prior art keywords
web
splicing
roll
running
machine reel
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.)
Ceased
Application number
PCT/FI2003/000609
Other languages
English (en)
Inventor
Marko Tiilikainen
Silvo Mikkonen
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.)
Valmet Technologies Oy
Original Assignee
Metso Paper 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 Metso Paper Oy filed Critical Metso Paper Oy
Priority to AU2003251024A priority Critical patent/AU2003251024A1/en
Publication of WO2004018337A1 publication Critical patent/WO2004018337A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
    • B65H19/1857—Support arrangement of web rolls
    • B65H19/1868—The roll support being of the turret type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
    • B65H19/1805—Flying splicing, i.e. the expiring web moving during splicing contact
    • B65H19/181—Flying splicing, i.e. the expiring web moving during splicing contact taking place on the replacement roll
    • B65H19/1821—Flying splicing, i.e. the expiring web moving during splicing contact taking place on the replacement roll the replacement web being accelerated or running prior to splicing contact
    • 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
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/413—Supporting web roll
    • B65H2301/4136—Mounting arrangements not otherwise provided for
    • B65H2301/41361—Mounting arrangements not otherwise provided for sequentially used roll supports for the same web roll
    • 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
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/463—Splicing splicing means, i.e. means by which a web end is bound to another web end
    • B65H2301/4633—Glue
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/177—Fibrous or compressible material

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • a continuous unwind is used in which a new machine reel brought to the unwind is joined at full speed to the tail of an expiring machine reel.
  • the end of the web of the new machine reel is prepared with a splice using double-sided adhesive tape, which splice is attached to the surface of the reel by means of pieces of adhesive tape.
  • the surface speed of the new machine reel is accelerated to a speed equal to the running speed of the machine, after which the web of the expiring machine reel is pressed into contact with the above-mentioned splice by means of a roll or a brush.
  • the old web is cut off by means of a knife from above the splice.
  • a paster roll usually having a thick soft rubber surface is generally used as the splicing device of a continuous unwind.
  • the core material of the paster roll is generally steel, but it may also be of some other material, such as, for example, carbon fibre.
  • the splicing at the unwind has become problematic at today's running speeds (1200 - 1800 m/min). For this reason, the running speed of the coater is often lowerred for the time of splicing.
  • the most important causes of the problem of splicing are air flows and the required high speed of movement of the paster roll.
  • an underpressure is produced in a so- called splicing gap between the paster roll moved to the vicinity and the machine reel, which underpressure may be pulsating if the new machine reel is out-of- round. The underpressure tends to pull the old web partly into contact with the splice even before the splicing operation and cause fluttering of the old web.
  • the underpressure tends to separate the tape splice from the surface of the new machine reel, so that the new machine reel "explodes” before splicing.
  • an angular bend is required at the paster roll, which again calls for stretching of the web when the paster roll is quickly struck against the surface of the new machine reel.
  • the tension peak caused by the hitting of the roll during splicing is attempted to be kept low by using a small splicing gap (8 - 12 mm), which gives rise to an intensive underpressure phenomenon. Even the bend angle used today causes a problematic tension peak in the web. At higher running speeds an even larger bend angle would be required.
  • the main problems in the splicing devices of a continuous unwind are the high speed of the stroke of the paster roll, the large bend angle of the web and the underpressure formed in the splicing gap.
  • the underpressure causes harmful fluttering and the possibility of the tape used for splicing becoming separated is very high.
  • the risk of web break increases.
  • the risk of web break increases.
  • the splicing gap is made smaller, the consequence is an increase in underpressure and the resultant adverse effects.
  • the tension peak to which the web is subjected i.e. the risk of web break, becomes higher.
  • FI patents FI 100323 and FI 96299 disclose solutions relating to the problems caused by the large bend angle of the web and the underpressure in the splicing gap, as well as arrangements for providing a sufficient adhesion time for a splicing tape to adhere.
  • FI patent 100323 discloses a splicing device for a continuous unwind, by means of which device a new machine reel brought to the unwind is joined at full speed to the web of an expiring machine reel.
  • the splicing device comprises a paster roll, by means of which the web of the expiring machine reel is pressed into contact with a splice on the new machine reel, and at least one second roll.
  • the paster roll and the second roll are attached to a lever device which is mounted by means of an articulation point between shafts of the rolls such that the running of the web before splicing and the running of the web during splicing are such that the length of the web during splicing and when said rolls are in a basic position, is substantially equal.
  • FI patent 96299 discloses a splicing device for a continuous unwind, by means of which device a new machine reel brought to the unwind is joined at full speed to the web of an expiring machine reel, the splicing device comprising a paster roll, by means of which the web of the expiring machine reel is pressed into contact with a splice on the new machine reel, and which splicing device comprises at least one second roll, and in which splicing device the paster roll and said second roll are attached to a lever device which is mounted by means of an articulation point between shafts of said rolls such that the running of the web before splicing and the running of the web during splicing are such that the length of the web during splicing and when said rolls are in a basic position, is substantially equal.
  • a support wire is arranged to run via the paster roll and said second roll to form a wire nip, so that the time of adhesion available for splicing increases manyfold.
  • Some fluttering also occurs when the expiring reel is being lifted from a lower winding position to an upper winding position, in particular when the unwinding web, while it moves substantially vertically from above downwards, comes into contact with a rotating paster roll. In this tangential situation, the web flutters strongly for a short time.
  • One object of the invention is to provide solutions to the above-noted problems caused by fluttering.
  • An object of the invention is to provide an improvement in the currently known splicing devices for a continuous unwind stand.
  • a more particular object of the invention is to provide a splicing device of a continuous unwind in which the drawbacks encountered in the arrangements of the state of the art are avoided.
  • the device according to the invention is mainly characterized in what is stated in the characterizing part of claim 1.
  • a blowing device advantageously assembled of modules and forming the device according to the invention, is mounted in the region between a paster roll and a paper guide roll across the full width, and advantageously such that the device has several blow zones in succession in a machine direction.
  • the blowing direction of the blow nozzle of the device is opposite or parallel to the running direction of the web or a combination of these.
  • the modules i.e guide plates, which have blowing rows formed of blow nozzles
  • the modules can be unequal or equal in length in the running direction of the web and, when desired, it is possible to use several component modules of unequal or equal width in a direction transverse to the running direction of the web.
  • blow units of the device in accordance with the invention when some of the blowing rows, i.e. of sets of blowing rows, have been activated, draw the web into contact with themselves before splicing, and the fluttering of the web is prevented after splicing by increasing blowing capacity and/or by activating the rest of the sets of blowing rows. At the same time, the surface sheets of the reel being spliced can be tightened and the detrimental tension drop after splicing is eliminated.
  • the blow zones formed by the blowing rows of the device in accordance with the invention can be profiled in respect of tension by means of a variable pressure and/or volumetric flow.
  • the invention provides, among other things, the following benefits:
  • - surface sheets can be tightened after a splice by deflecting the web suitably by means of blowings, - the web can be tightened in a profiling manner, for example, more at the edges.
  • the modular construction in accordance with an advantageous embodiment of the invention facilitates transportation and mounting.
  • the device in accordance with the invention can also be used for stabilizing the running of the web temporarily for a few seconds when an expiring reel is being lifted from a lower winding position to an upper winding position, in particular at the moment when an unwinding web comes into contact with the rotating paster roll while moving vertically from above downwards.
  • the fluttering of the web is damped down by blowings produced by means of the blowing rows of the device in accordance with the invention.
  • the device in accordance with the invention is also suitable for use during lifting according to other alternative splicing methods: - the paster roll is stopped, at low speed or crawling,
  • the invention is suitable for use advantageously at running speeds exceeding 1200 m/min, in particular at running speeds exceeding 1500 m/min.
  • Figure 1 is a schematic general view of a continuous unwind in connection with which one advantageous embodiment of the device in accordance with the invention has been placed.
  • Figure 2 is a schematic view of making use of one embodiment of the device in accordance with the invention when a reel is moved to a secondary winding position while the reel is expiring.
  • Figure 3 is a schematic view of making use of one embodiment of the device in accordance with the invention for stabilizing the web during winding from a secondary position and during the splicing acceleration of a machine reel to be spliced.
  • Figure 4 is a schematic view of using one embodiment of the device in accordance with the invention in connection with splicing for tightening a loose surface and for stabilizing the running of the web.
  • Figure 5 is a schematic view of using one embodiment of the device in accordance with the invention in connection with backing up of the splicing mechanism after splicing.
  • FIGS 6A - 6E schematically show some exemplifying embodiments of the device in accordance with the invention.
  • Figure 7 is a schematic view of one embodiment of the device in accordance with the invention, which embodiment is formed of a set of guide plates of modular construction.
  • an expiring machine reel is denoted with the reference numeral 11 and a paster roll with the reference numeral 12.
  • a guide roll of a web W preceding the paster roll 12 is denoted with the reference numeral 13 A.
  • the expiring machine reel 11 has been lifted to a secondary winding position and a new machine reel 14 has been brought to a ready position for splicing.
  • the direction of rotation of the expiring machine reel 11 is indicated by the arrow Si i and the direction of rotation of the new machine reel 14 is indicated by the arrow S 14 .
  • a guide roll of the web W in the mechanism of splicing is denoted with the reference numeral 13.
  • a device 15 in accordance with the invention is placed on the web run between the paster roll 12 and the guide roll 13 of the web W placed after it, which device 15 is formed, in this exemplifying embodiment of the invention, of a set of guide or blowing plates 17, which is modular in construction and comprises blow nozzles 16 placed in a direction transverse to the running direction Sw of the web W.
  • the set of blowing plates 17 of modular construction in accordance with this embodiment of the device in accordance with the invention is thus formed of nozzle structures 16 placed in succession in the running direction of the web and, when desired, of several structures which are placed transversely to the running direction Sw of the web and which are separately adjustable.
  • the nozzle structure 16 may also be continuous in a direction transverse to the running direction Sw of the web W.
  • the modular embodiment of the device 15 in accordance with the invention is easy to mount in place in mill conditions, and no large uniform plate field is formed which is problematic in respect of its mounting technique.
  • blow nozzles/a blow nozzle 16 of the device 16 air is blown from blow nozzles/a blow nozzle 16 of the device 16, whereby the web W can be caused to adhere to and run along the surface of the guide plates 17, so that fluttering after splicing is prevented.
  • a blow nozzle 16 / desired blow nozzles 16 are activated and the fluttering of the web W after splicing is prevented by increasing blowing capacity and/or by activating more blow nozzles 16.
  • the activation of the blow nozzles 16 used can be accomplished such that some of the blow nozzles 16 placed in succession in the running direction S w of the web and/or some of the blow nozzles 16 situated in a direction transverse to the running direction S of the web W are activated.
  • the thus provided blow zones can be profiled in respect of tension by means of a variable pressure and/or the volumetric flow used.
  • Fig. 2 schematically shows the use of the device 15 in accordance with the invention when an expiring machine reel 11 is being lifted to a secondary winding position 11', which is indicated by the arrow Sy.
  • the same reference numerals are used of the parts corresponding to those of Fig. 1.
  • FIG. 3 reference signs corresponding to those of Figs. 1 and 2 are used of the parts corresponding to one another.
  • the web W is being passed from an expiring machine reel 11 and a new machine reel 14 is being accelerated to splicing speed, in which connection the web W flutters in the region W L during splicing acceleration.
  • the web W is caused to run via the device 15 by means of blowings from the blow nozzles 16 of the device 15 in accordance with the invention, whereby fluttering is attenuated.
  • Fig. 4 shows how a surface sheet is tightened and the running of the web W is stabilized by means of blowings of the blow nozzles 16 produced by the device 15 in accordance with the invention during splicing.
  • the web W on the run W L at the device 15 is guided by means of the blowings of the blow nozzle 16 to run via the device 15, whereby the surface layers of the reel 14 are tightened.
  • Fig. 5 is a schematic view of a situation where a paster roll 12, a web guide roll 13 of the splicing device and a web guide roll 13A preceding the paster roll 12 are being backed away from the splicing position after splicing.
  • the device 15 in accordance with the invention is also backed up from the splicing position and, when needed, blowings that stabilize the running of the web can then be blown from the blow nozzle 16 of the device 15.
  • the transfer movements away from the splicing position after splicing are indicated by the reference arrows S in the figure.
  • Fig. 6 A is a schematic transverse view of the device 15 in accordance with the invention, placed on the run between a paster roll 12 and a web guide roll 13 of the splicing device.
  • the arrows indicate blowings blown from blow nozzles of the device 15 in accordance with the invention for the purpose of stabilizing the running of the web W.
  • this exemplifying embodiment of the invention does not have a modular construction but is formed of a single, for example, box-like device unit, the blow nozzles 16 of which provide a uniform blowing over the entire width of the web.
  • the device in accordance with the invention may also be of sectional construction in a direction transverse to the running direction of the web, so that blowings can also be regulated in the transverse direction of the web.
  • the device 15 in accordance with the invention may also be a roll, for example, a grooved roll or a roll of a sectional roll construction, which can be provided with a drive or can be without a drive.
  • Fig. 6D shows an arrangement in accordance with the invention in which a blow nozzle structure 16 is arranged in connection with a spreader bar 15.
  • Fig. 6D shows an embodiment in which blow nozzles 16 are arranged in connected with a rib-like structure 15.
  • the trailing edge of each guide plate of the set of guide plates 17 can be rounded, when desired, to remove the air flow coming from the blow nozzle 16 and along with the web W and to remove the counter flow of the web guide roll 13 of the splicing device.
  • Fig. 7 schematically shows a device arrangement formed of a set of modular guide plates 17 of the device 15 in accordance with the invention, in which arrangement the trailing edge of the plate is provided with a rounding to guide the flow of air.

Landscapes

  • Replacement Of Web Rolls (AREA)

Abstract

L'invention a trait à un dispositif relié à un dispositif de raccordement permettant la déroulement continu d'une nappe fibreuse, en particulier une bande de papier ou de carton. Ledit dispositif de raccordement comprend un rouleau dérouleur (12) au moyen duquel une bande (W) issue d'une bobine (11) de machine finissante est pressée en contact avec une collure placée sur une nouvelle bobine (14) de machine. Un dispositif (15) est relié au dispositif de raccordement sur une bande passant entre le rouleau dérouleur (12) et un rouleau guide papier (13) suivant ou un rouleau équivalent guidant le passage de la bande (W). Au moins une buse de soufflage (16), qui est reliée audit dispositif (15) et s'étend dans le sens de la largeur de la bande (W), souffle pour produire des flux d'air ayant pour effet de stabiliser le passage de la bande (W), et pour provoquer le passage de la bande à travers le dispositif (15).
PCT/FI2003/000609 2002-08-20 2003-08-18 Dispositif relie a un dispositif de raccordement permettant le deroulement continu d'une nappe fibreuse, en particulier une bande de papier ou de carton Ceased WO2004018337A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003251024A AU2003251024A1 (en) 2002-08-20 2003-08-18 Device in connection with a splicing device for a continuous unwind of a fibrous web, in particular a paper or board web

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20021498A FI20021498A7 (fi) 2002-08-20 2002-08-20 Laite kuiturainan, erityisesti paperi- tai kartonkirainan jatkuvatoimisen aukirullaimen saumauslaitteen yhteydessä
FI20021498 2002-08-20

Publications (1)

Publication Number Publication Date
WO2004018337A1 true WO2004018337A1 (fr) 2004-03-04

Family

ID=8564452

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2003/000609 Ceased WO2004018337A1 (fr) 2002-08-20 2003-08-18 Dispositif relie a un dispositif de raccordement permettant le deroulement continu d'une nappe fibreuse, en particulier une bande de papier ou de carton

Country Status (3)

Country Link
AU (1) AU2003251024A1 (fr)
FI (1) FI20021498A7 (fr)
WO (1) WO2004018337A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4936942A (en) * 1987-06-23 1990-06-26 J. M. Voith Gmbh Suction box for stabilizing web at connecting point
EP0461812A1 (fr) * 1990-06-07 1991-12-18 Union Camp Corporation Des parois pour réduction de l'ondulation
DE4334468A1 (de) * 1993-10-11 1995-04-13 Krieger Gmbh & Co Kg Verfahren und Vorrichtung zur Stabilisierung einer laufenden Bahn
EP0732287A2 (fr) * 1995-03-17 1996-09-18 Voith Sulzer Papiermaschinen GmbH Dispositif pour stabiliser une bande
US5709355A (en) * 1994-06-16 1998-01-20 Valmet Corporation Splicing device for a continuous unwind stand
US5855672A (en) * 1995-05-20 1999-01-05 Voith Sulzer Papiermaschinen Gmbh Stationary sliding bar
EP0959033A2 (fr) * 1998-05-18 1999-11-24 Kabushiki Kaisha Tokyo Kikai Seisakusho Méthode et dispositif pour atténuer le flottement d'une bande, et application au raccordement de bandes
WO2001060729A1 (fr) * 2000-02-15 2001-08-23 Metso Paper, Inc. Procédé et appareil de déroulement

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4936942A (en) * 1987-06-23 1990-06-26 J. M. Voith Gmbh Suction box for stabilizing web at connecting point
EP0461812A1 (fr) * 1990-06-07 1991-12-18 Union Camp Corporation Des parois pour réduction de l'ondulation
DE4334468A1 (de) * 1993-10-11 1995-04-13 Krieger Gmbh & Co Kg Verfahren und Vorrichtung zur Stabilisierung einer laufenden Bahn
US5709355A (en) * 1994-06-16 1998-01-20 Valmet Corporation Splicing device for a continuous unwind stand
EP0732287A2 (fr) * 1995-03-17 1996-09-18 Voith Sulzer Papiermaschinen GmbH Dispositif pour stabiliser une bande
US5855672A (en) * 1995-05-20 1999-01-05 Voith Sulzer Papiermaschinen Gmbh Stationary sliding bar
EP0959033A2 (fr) * 1998-05-18 1999-11-24 Kabushiki Kaisha Tokyo Kikai Seisakusho Méthode et dispositif pour atténuer le flottement d'une bande, et application au raccordement de bandes
WO2001060729A1 (fr) * 2000-02-15 2001-08-23 Metso Paper, Inc. Procédé et appareil de déroulement

Also Published As

Publication number Publication date
AU2003251024A1 (en) 2004-03-11
FI20021498L (fi) 2004-02-21
FI20021498A7 (fi) 2004-02-21
FI20021498A0 (fi) 2002-08-20

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