WO2002026608A2 - Enroulement de bande - Google Patents

Enroulement de bande Download PDF

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Publication number
WO2002026608A2
WO2002026608A2 PCT/CA2001/001378 CA0101378W WO0226608A2 WO 2002026608 A2 WO2002026608 A2 WO 2002026608A2 CA 0101378 W CA0101378 W CA 0101378W WO 0226608 A2 WO0226608 A2 WO 0226608A2
Authority
WO
WIPO (PCT)
Prior art keywords
strip
winding
duct
package
core
Prior art date
Application number
PCT/CA2001/001378
Other languages
English (en)
Other versions
WO2002026608A3 (fr
Inventor
Lawrence O'connor
Peter D. V. Nguyen
Minh Thanh Vuong
Darrell M. Vanmol
Original Assignee
Kt Holdings Inc.
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 Kt Holdings Inc. filed Critical Kt Holdings Inc.
Priority to AU2001293582A priority Critical patent/AU2001293582A1/en
Publication of WO2002026608A2 publication Critical patent/WO2002026608A2/fr
Publication of WO2002026608A3 publication Critical patent/WO2002026608A3/fr

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
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/26—Cutting-off the web running to the wound 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
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • 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
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/2284—Simultaneous winding at several stations, e.g. slitter-rewinders
    • 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
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/28—Attaching the leading end of the web to the replacement web-roll core or spindle
    • B65H19/286—Attaching the leading end of the web to the replacement web-roll core or spindle by applying adhesive to the 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
    • B65H2301/414—Winding
    • B65H2301/4143—Performing winding process
    • B65H2301/41432—Performing winding process special features of winding process
    • B65H2301/414321—Performing winding process special features of winding process helical winding
    • 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
    • B65H2301/414—Winding
    • B65H2301/4148—Winding slitting
    • 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
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/515—Cutting handled material
    • B65H2301/5151—Cutting handled material transversally to feeding direction
    • 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
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/515—Cutting handled material
    • B65H2301/5153—Details of cutting means
    • B65H2301/51538—Die-cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/32—Suction belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2408/00—Specific machines
    • B65H2408/20—Specific machines for handling web(s)
    • B65H2408/23—Winding machines
    • B65H2408/236—Pope-winders with first winding on an arc of circle and secondary winding along rails

Definitions

  • This invention relates to a method for winding a plurality of and finds particular but not exclusive application to a method for winding a plurality of strips slit from a continuous fed web such as at the end of a manufacturing line.
  • Film and other sheet materials such as air laid paper and other fibrous products are generally formed in web width, which can be of the order of 3 to 4 meters (about 9.8 to 13.1 feet) in width, for example.
  • the end use of the material requires a strip of much narrower width, for example from a V ⁇ inch to several inches in width. It is necessary or desirable, therefore, that the web material is slit into a plurality of individual strips which can then be wound onto a suitable supply package for supply to the end user.
  • the initial web may be of the order of 4 meters (about 13.1 feet) in width and then slit to form individual strips of between 2 and 4 inches in width for use in absorbent products such as feminine hygiene products and diapers.
  • the web of sheet material is conventionally wound onto a spiral roll where the width of the roll is equal to the width of the web and the sheet material is wound up to a diameter of the order of 4 to 8 feet (1.2 to 2.4 meters).
  • This wound roll forms a master roll, which is then shipped to another location either at the same plant or often at a manufacturing facility where the master roll is divided, typically slit, into the individual strips.
  • slitting is carried out in two stages so that the first wide web is slit into narrower webs, which are again wound into spiral form. Then, subsequently, the narrower webs are slit into individual strips.
  • the forwarding speed of the web can be controlled in dependence upon the winding stations.
  • control may include stopping the forwarding movement when the individual packages of a set of strips are formed up to a required diameter so that the packages can be replaced by an empty core while the line is stationary.
  • the transfer of winding takes place manually since the machine is stationary. The transfer process can therefore occur over a period of time without concern about the continuous forwarding of the strips.
  • the strips can be formed into an individual single width spiral roll of the strip, generally known as a pancake roll.
  • pancake rolls contain a limited amount of the strip material, and the structure is relatively unstable in view of its narrower width and large diameter.
  • the strips can be formed into traverse wound rolls in which the strip is traversed back and forth axially while it wraps angularly around the core.
  • This structure contains a much greater length of the strip material and in many cases is more stable.
  • this structure has the disadvantage that an increased area is required for the winding to occur.
  • a method comprising: forwarding a web from a supply; separating the web longitudinally at a separating station into a plurality of strips; transporting each of the strips from the separating station to one of a plurality of separate winding stations; at each winding station, winding the respective strip onto a core into a cylindrical package in which the strip is traversed axially of the core while wrapping around the core; and transferring winding of each strip at the respective winding station from a wound package on a core to an empty core for a new package while the web continues to be forwarded and the strips continue to be transported.
  • core used herein is not intended to imply any structure or materials which would particularly be used and the core may form a component of the machine from which the package is separated or may comprise a cylindrical body which remains with the package during transportation and use.
  • strip used herein is not intended to imply any particular material or dimensions and the present invention can be applied to different material and strips of different dimensions provide the strip has a surfaces of a width greater than the thickness of its edges and thus is distinguished from yarn or the like which has totally different winding characteristics since it does not need to be laid during traverse on its surfaces.
  • traversing the strip relative to the package during winding this can include both continuous traversing movement to form a helical path of the strip on the package with reversals only at the ends to form what is generally known as a "traverse package” or to traversing movements which are intermittent or variable in rate.
  • Intermittent movement is known to provide a package structure which is generally known as "step” winding where the traverse is held stationary for a period to build up a small step before continuing helically to a next position.
  • the supply may run substantially continuously, except perhaps for periodic shutdowns and temporary breakdowns. This would obligate the winding stations to operate continuously during transfer and at any breakdown of the strip.
  • the method is primarily described with respect to an arrangement in which the supply is a manufacturing line in which the web is manufactured and runs substantially continuously. However, the method described herein is not exclusively applicable to such manufacturing lines and may be applied to any continuous feeding arrangement.
  • the slit strip is transported through a duct.
  • the duct is desirable to protect the strip and to contain any powder or dust which may be released by the strip in its movement from the manufacturing line to the individual winding stations.
  • the transportation can be relatively long since in many cases the winding stations, being relatively large in total area, are located in a different area of the facility.
  • any guiding arrangement can be used and may be more or less desirable depending on the particular application and/or sheet material.
  • a guide channel, closed or open and of various shapes can be used.
  • the strip is transported using air to draw the strip.
  • air in a duct is preferable to avoid long belts that mechanically travel from the manufacturing line along an often contorted path to the winding station.
  • belts or other mechanical conveyers of a conventional nature can also be used.
  • the transport to the winding station is self-threading, for example by the air stream method.
  • the transport system may use an additional air stream to effect the self threading after which the additional air stream is shut off allowing the strip to be pulled through the transport system without air support or carried by just sufficient air to reduce or eliminate friction.
  • threading could be used including mechanical or manual threading if so desired.
  • each winding station can include a separate drive.
  • the separate drives can provide independent speed of rotation and speed of traverse with respect to the other winding stations.
  • the strip is removed from the duct by providing in the duct an air permeable conveyer member having a strip engaging surface moving transversely to the duct through one side of the duct such that the strip is engaged by the surface and moved to the one side out of the air.
  • the air permeable conveyer comprises a plurality of side by side parallel stripping belts with spaces therebetween allowing the air to pass through and the air permeable conveyer is arranged prior to an air outlet of the duct such that the strip is removed from the duct prior to the air so that the suction and turbulence caused thereby do not interfere with the strip.
  • a conveyer formed of screen or mesh may be used.
  • the air is drawn by a suction fan through the air opening and wherein the air permeable conveyer carries the strip into a substantially closed housing so as to reduce air loss into the duct where the strip is withdrawn.
  • a second member outside the duct for nipping the strip between the air permeable conveyer and the second conveyer.
  • a method comprising: providing a strip; transporting the strip to a winding station; and at the winding station, winding the strip onto a core; wherein the step of transporting the strip includes transporting the strip through a duct by drawing air through the duct.
  • a method comprising: providing a strip; transporting the strip through a duct by drawing air through the duct; and removing the strip from the duct by providing in the duct an air permeable conveyer member having a strip engaging surface moving transversely to the duct through one side of the duct such that the strip is engaged by the surface and moved to the one side out of the air.
  • a method comprising: providing a strip; transporting the strip to a winding station; at the winding station providing a wound package support for winding the strip into a wound package and an empty core support for supporting an empty core for starting winding a new package; transversely cutting the strip by a transverse die cutter blade while the strip continues to be transported to form a leading end and a trailing end, wherein the trailing end forms the end of the wound package; and securing the leading end of the strip to the empty core so that the leading end forms the beginning of the new package.
  • a method comprising: providing a strip; transporting the strip to a winding station; at the winding station providing a wound package support for winding the strip into a wound package and an empty core support for supporting an empty core for starting winding a new package; cutting the strip to form a leading end and a trailing end, wherein the trailing end forms the end of the wound package; and securing the leading end of the strip to the empty core so that the leading end forms the beginning of the new package; wherein the empty core is moved after winding is commenced from an empty core loading position to a wound package winding position.
  • a wound package core holder at the wound package winding position and an empty core holder at the empty core loading position and wherein the empty core is transferred from the empty core holder to the wound package core holder after winding is started on the empty core and after the wound package is doffed from the wound package core holder.
  • the method includes providing a drive surface on which both the wound package and the empty core engage where the drive surface is a cylindrical surface and wherein the empty core holder and the wound package core holder are arranged at angularly spaced positions around the axis of the drive surface.
  • the empty core holder is located at the bottom of a core dispenser and is arranged at a top of the cylindrical drive surface to move upwardly as the started package begins to wind and wherein the wound package core holder is arranged at one side of the cylindrical drive surface to move generally horizontally as the wound package increases in diameter and the drive surface and the core holders traverse horizontally along an axis of the cores while the strip is held stationary.
  • Figure 1 is a schematic illustration of a web manufacturing line including a plurality of individual winding stations arranged for continuously winding a plurality of strips from a web.
  • Figure 2 is a side elevational view in partial section showing one of the winding stations of Figure 1.
  • Figure 3 is a top plan view of the winding station of Figure 2.
  • Figure 4 is an enlarged transverse cross-sectional view along the lines 4-4 of Figure 2 showing the strip removal system from the end of the transfer duct.
  • Figure 5 is an enlarged side elevational view showing a part of the winding station of Figure 1 including the strip removal system and the strip cutting system.
  • Figure 6 is an enlarged side elevational view showing the strip winding transfer system of the winding station of Figure 2.
  • Figure 1 schematically shows a web manufacturing line 10 for supplying a web 11 in a relatively wide web width.
  • a relatively wide width can be, for example, but not limited to, about six to fifteen feet.
  • the manufacturing line 10 is generally continuous so that it supplies the web 11 continuously, effectively without stops except for inadvertent breakdowns and periodic shutdowns.
  • the web 11 is supplied to a separating station, such as a slitting station 12 where the web 11 is slit into a plurality of side by side strips S.
  • the number of the strips S is dependent upon the width of the strips relative to the width of the web so that preferably all of the web width except for optional waste side edges are used to form the strips side by side.
  • the slitting station 12 includes a plurality of disks, as discussed below, but could also include slitters or knives arranged to form separate parallel strips. Other ways of dividing the strip are also suitable, including perforating the strip or scoring the strip to create lines of weakness. Then, the strip may be separated by pulling or otherwise dividing the strips. Depending on the sheet material, predetermined lines of weakness may also be formed therein and the dividing station may merely separate the strips along the predetermined lines. Further, any known method of physically dividing the strips may be used, including mechanical or optical mechanisms.
  • the strips S are supplied from the slitting station 12 to a plurality of individual winding stations 13, where each strip S is wound into a traverse roll of the strip by traversing the strip axially of the package while wrapping the strip around a core.
  • the number of winding stations 13 is, of course, equal to the number of strips S so that each strip S is transported from the manufacturing line 10 and particularly slitting station 12 to a winding area schematically indicated at 13A where the winding stations are located and laid out in a convenient manner.
  • the strips S are picked up from the slitting station 12 by a pickup system 14, which acts to take up each strip S as it emerges from the slitting station 12 and to transfer that strip S through an individual transport system 15, 16 to a respective one of the winding stations 13.
  • the pickup system 14 acts to split the strips S alternately into an upper path 17 and a lower path 18 so that there is therefore generated spacing between the strips S so that the strips can enter into respective transport ducts forming the transport system 15, 16.
  • any number of paths from a single path to an unlimited number of paths, can be used depending on the desired transport arrangement and the size of the strips.
  • the slitting station is preferably formed by rotary slitters so that each slit is formed by a pair of overlapping discs.
  • the discs are arranged on an upper shaft and lower shafts at spaced positions along the shafts equal to the spacing of the required slits.
  • Rotary slitters of this type are well known and rotate in opposite direction so as to tend to feed the web through the area between the slitting discs so that the strips emerge from the spaces between the slitting discs as a plurality of strips generally side by side.
  • various different types of dividing mechanisms may be used, including toothed rollers or upstanding fixed blades.
  • the winding station 13 which includes a first fixed station 30 connected to the duct 15 for extracting the strip from the duct and for supplying the strip at a lay on roller 31 in line relative to the duct 15 and stationary relative thereto.
  • the first fixed section 30 co-operates with a second traversing section 32 which carries a drive roller 33 driving a rotating package 34 on which the strip is wound.
  • the traversing station 32 includes a frame 38 supporting the various components and mounted on tracks 39 which allow the station 32 to be traversed back and forth along an axis 33A of the drive roller 33 driven by a suitable reciprocation drive mechanism schematically indicated at 40.
  • a magazine 35 is provided for supplying empty cores 36 to the traversing station. This co-operates with a holder 37 carried on the traversing station for holding an empty core to be applied to the drive roller 33.
  • the magazine is held stationary for loading and is arranged to drop the empty core onto the traversing holder on the traversing station.
  • the strip is supplied through the duct 15 to the station 30 where it is stripped from the duct and supplied through a conveyor system generally indicated at 41 to the lay on roller 31 where the strip is fed forwardly onto the drive roller 33 which rotates in a counter clockwise direction and simultaneously traverses back and forth along the axis of the drive roller so that the strip is carried around the drive roller and laid onto the package 34 in helical path around the package traversing back and forth across the width of the package between side edges and 34A and 34B of the package to form a traverse wound package structure.
  • the conveyor section 41 includes a strip extraction section 42 which extracts the strip from an extraction housing 43 attached to the end of the duct 15 at a position upstream of a suction system schematically indicated at 44.
  • the strip extraction system 42 is located in effect in the duct at a location prior to the suction so that the air is withdrawn from the duct only after the strip has been extracted and transferred into a housing 45.
  • a strip cutter 46 arranged to transversely cut the strip into trailing and leading ends for transfer of winding from the wound package 34 to the empty core 36.
  • a conveyor section 47 Downstream of the cutter section 46 is provided a conveyor section 47 which carries the strip from the cutter section to the lay on roller 31.
  • an adhesive applicator 48 arranged to apply an adhesive onto the leading end of the cut strip.
  • the trailing end of the cut strip can therefore continue past adhesive applicator and past the empty core at the top of the drive roller 33 and can complete winding onto the wound package 34.
  • the application of adhesive to the leading end on the surface of the strip facing away from the drive roller 33 causes it to be engaged onto the surface of the empty core to commence winding on that core.
  • the package 34 is discarded from a holder 49 for the wound package onto a discharge frame 50 so that a transverse shaft 51 of the core of the wound package can roll along the frame 50 into a hook receptacle 52 allowing the wound package to be removed from the area of the drive roller 33 into a discharge location.
  • discharge of the wound package from the frame 50 is carried out by rapidly lowering a pair of arms 53 and 54 of the frame 50 as the package traverses on the frame 38 so that the arms are moved away from the package as the package is dropped onto a stationary support alongside the frame 38.
  • Other devices for transferring the wound package from the traversing cradle can be provided and the system shown is merely one example.
  • the holder 37 for that empty core on which winding has commenced is pivoted from its position above the drive roller 33 around the axis of the drive roller to a position at 90° from the top position that is aligned with the horizontal location of the holder 49. In this position the empty core on which winding has commenced is transferred from the holder 37 to the holder 49 so that winding can continue on the wound package now transferred to the holder 49.
  • the holder 49 is mounted on a sliding carriage 55 which moves horizontally so as to move the core of the wound package 34 away from the drive roller 33 as the package increases in diameter.
  • the duct 15 connected to the extraction housing 43 includes a square section 15A with a flat bottom 15B on which the strip lies.
  • This square section portion 15A attaches to a rectangular housing section 43A with vertical side wall 43B and 43C.
  • a further duct section 15C which connects to the suction system 44.
  • the main portion of the duct 15 from the pickup section at the manufacturing location to the winding station is formed from a duct section of circular cross section which is commercially available for transporting powders and other bulk materials in air stream.
  • Such commercially available circular ducting or piping is manufactured with smooth inside surfaces to prevent catching of the materials within the duct and with relatively large radius curved connections allowing the duct to be shaped to follow particular paths both horizontal, vertical and at angles in between and to change direction both vertically and horizontally.
  • the strip has been found to lie against the wall of the duct during its movement along the duct and to take up the position of minimum length around the corners automatically while remaining flat and avoiding folding or kinking or fluttering.
  • the strip is drawn into and along the duct by the air stream generated by the suction system 44.
  • the duct is changed to a section having a flat bottom 15B so that the strip, regardless of its position and location in the duct prior to the end portion is laid flat on the bottom 15B so that its position is defined within the duct.
  • its position across the width of the duct may vary slightly and the flat bottom is selected to be of a width greater than the intended width of the strip to be transported so that the strip is flat without folds. The strip may therefore wander from side to side within the duct at the flat bottom 15B.
  • the extraction housing 43 includes depending walls 43D and 43E extending out of the bottom of the duct beyond the bottom wall 15B into a bottom area 43F leading to an outlet slot 43G at which the strip is discharged.
  • the wall of this housing is closed apart from the discharge slot 43G so that the duct is in effect closed and air is drawn into the duct only through the leading open mouth of the duct apart from a relatively small amount of air which cannot be prevented from entering the slot 43G.
  • the air flow is maximized through the leading open mouth for carrying the strip through the duct.
  • the strip extraction system 42 includes an air permeable conveyor 57 and a belt conveyor 58 which nip the strip at a nip location 59 and carry the strip through to the discharge slot 43G and to a guide roller 58C of the belt 58.
  • the air permeable conveyor 57 is of a character which allows the air to pass through the conveyor without generating significant turbulence while providing a portion of the belt crossing the line of the duct in the extraction housing 43.
  • the air permeable conveyor comprises a top guide roller 57A around which the conveyor passes together with a bottom guide roller 57B adjacent to the slot 43G and just behind the guide roller 58C of the belt 58.
  • the conveyor further includes two idler rollers 57C and 57D which define a main path 60 for the belt from the roller 57A down to the roller 57D and along horizontally between the roller 57D and the roller 57B.
  • This main path of the conveyor carries the strip out of the duct onto the slot.
  • the path 60 is inclined across the duct downwardly and rearwardly of the air stream and thus crosses the line of the bottom wall 15B of the duct at an angle of the order of 45° across the width of the duct.
  • a suitable one of the rollers of each of the conveyors 57 and 58 is suitably driven at a speed governed by the line speed so that the strip is fed into the duct at a predetermined speed and is carried out of the duct at the same predetermined speed controlled by the drive to the belts.
  • the air permeable conveyor is conveniently formed by a plurality of parallel side by side bands 60A, 60B, 60C and 60D which are spaced apart across the width of the strip.
  • the side bands 60A and 60D are located at a position which is intended to be slightly inwards of the side edges S1 and S2 of the strip S.
  • the two intermediate bands 60B and 60C are located suitably in between the side bands.
  • the number of bands can of course be modified in accordance with the width and characteristics of the strip that is of course desirable that the bands be of a thickness and arrangement so that they do not interfere with the general air flow through the duct or cause turbulence in the air flow at the strip extraction section.
  • the bands can conveniently be formed from circular rubber or similar elastomeric material. The bands run in grooves 60D in the guide rollers so that the position is located and the bands remain parallel and side by side.
  • a crown roller 61 which has its axis lying at the line of the bottom wall 15B and projects upwardly proud of a line of a bottom wall 15B to engage the under-surface of the strip and to lift that strip from the line of a bottom wall up to a position slightly raised therefrom for engaging the air permeable conveyor 57.
  • the crown roller has a crowned surface with a center line 61 A of the crown roller lying along the center of the duct so that the crown tends to center the strip as it approaches the air permeable conveyor.
  • an additional lifting roller 62 which has an axis parallel to that of the crown roller so as to lift the strip initially off the line of the bottom wall toward the crown roller to provide a smoother guiding action of the strip over the open area between the end of the bottom wall 15B at the commencement of the housing to the air permeable conveyor for extraction from the housing.
  • the conveyor 58 as it is wholly outside the path of the duct can be formed from a convenient belting material simply designed to engage the underside of the strip and to carry the strip against the run 60 of the air permeable conveyor around the roller 57D, under the roller 57B to the leading guide roller 58C.
  • the strip is therefore presented at the end of the belt 58 on the guide roller 58C at a specific location across the width of the guide roller 58C and is maintained without side to side movement at that location.
  • a strip detection system is generally indicated at 63 and includes a transmitter 64 and a receiver 65 which detects the presence of a strip for control of the system as described hereinafter.
  • the cutting section 46 Downstream of the strip extraction system 42 is provided the cutting section 46 which acts to transversely sever the strip when it is required to transfer winding from a wound package to a new empty core. Severing can occur at a time determined by the control system which detects that the wound package 34 is of a required diameter. Alternatively severing can occur in the event that there has been a breakdown in the strip as detected by the detector 63. Thus if the strip running through the duct breaks down so that a tail end runs through the duct and is wound onto the package 34, this absence of a strip will be detected by the detector 63 noting that the tail end has passed and winding onto the package 34 has therefore been terminated with a break in the strip.
  • the leading end of the strip is again picked up by the discharge system and carried to the cutting section 46.
  • the leading end is carried to the drive roller 33 where it is extracted into a conventional waste suction port, otherwise known as a trim blower, 66 on the drive roller 33.
  • the waste suction port can be located at any suitable position in the strip path but is preferably located either on the roller 33 just in advance of the package 34 as shown in Figure 6 or just after the package.
  • the cutting section 46 includes a rigid anvil roller 46A located under the strip between the guide roller 58C of the belt conveyor 58 and a trailing roller 67A of a conveyor belt 67 of the second conveyor system 47.
  • a rigid anvil roller 46A located under the strip between the guide roller 58C of the belt conveyor 58 and a trailing roller 67A of a conveyor belt 67 of the second conveyor system 47.
  • the strip is transported between the guide rollers 58C and 67A across the surface of the roller above the axis of rotation 46B of the anvil roller 46A.
  • a cutting member 46C which includes a transverse blade 46D carried on a holder 46E mounted for rotation about an axis 46F.
  • the blade 46D extends along a line transverse along the length of the strip but at a slight angle relative to a line at right angles to the length of the strip so that it has one end slightly angularly advanced relative to the second trailing end.
  • the blade is shown at an initial start position in full line at 46D and at a completed stop position in phantom at 46G.
  • the blade is not at right angles to the length of the strip so that it passes through the nip in the plane containing those axes not in one path but in a slight diagonal path to reduce impact forces and to provide an improved cutting action.
  • the cutting action is effected while the blade moves through the nip in the direction of the strip at the same speed as the strip. This is obtained by starting the blade at a position just downstream of the nip N and rotating the blade in a clockwise direction so as to accelerate the blade from stationary up to strip speed through an angle just less than 360° so that the blade passes through the nip at strip speed and then immediately is decelerated in a symmetrical action through an angle just less than 360° to the stop position 46G.
  • Suitable engineering considerations can provide a motor and support for the blade which allow the mass of the blade to be sufficiently small to allow the blade to be accelerated during these angles of rotation and decelerated between stationary and strip speed.
  • This cutting action provides a clean transverse cut line at a slight angle to the length of the strip thus defining the trailing end and the leading end for the winding transfer as described hereinafter both of which continue to move across the anvil roller 46A to the trailing roller 67A of the belt 67.
  • the second conveyor section 47 simply includes the bottom belt 67 and a top belt 68.
  • the bottom belt 67 is wrapped around the trailing roller 67A at the trailing end and around a roller 67B at the leading end together with suitable idler and drive rollers 67C and 67D.
  • the belt 68 is wrapped around a trailing roller 68A on top of the belt 67 at a position advanced relative to the trailing roller 67A and is wrapped around a leading roller 68B at a position spaced rearwardly from the leading roller 67B.
  • the strip emerges from a nip 68C underneath the roller 68B and on top of the belt 67 from which it can pass to the lay-on roller 31.
  • the lay-on roller 31 is mounted between two arms each on a respective side of the roller 67B with the arms pivoted beneath the roller 67B on a pivot shaft 31 A.
  • the pressure applied by the roller 31 onto the drive roller 33 can be controlled by a cylinder 31 B.
  • the roller 31 is shown in a retracted position but normally in operation the roller 31 lies in contact with the drive roller 33. This acts therefore to guide the strip from the nip 68C underneath the roller 31 onto the top surface of the drive roller 33 to be wrapped around the drive roller 33 as the drive roller traverses back and forth on the moving carriage.
  • a load cell 69 which detects tension in the strip as it passes under the load cell in its path from a nip 68C to the roller 31. This tension is used in the control system to monitor and control winding speeds to ensure that the required tension in the strip is applied during winding to ensure the required density of material on the wound package, as is well known to one skilled in the art.
  • the strip passes onto the drive roller 33 and around approximately 180° of that roller to the nip between the package 34 and the drive roller as indicated at 34C.
  • the rate of rotation of the package is controlled so that the surface speeds are identical providing an accurate winding action.
  • the strip is laid on the driving roller 33 by the lay on roller, in view of the traversing action of the drive roller 33, it lies on the surface of the roller in a helical path, it remains in that helical path on the surface without moving relative to the surface of the drive roller 33 and therefore is applied to the package 34 at the required axial location to provide the required traverse action.
  • the speed of traversing movement of the carriage is controlled by a suitable detection system which detects the diameter of the package 34 and decreases the traverse speed so that it is at a higher rate when the diameter is smaller and decreases as the diameter increases, bearing in mind that the path length around the package increases as the diameter increases and bearing in mind that is desirable to provide a constant helical winding angle during the package build.
  • the holders 49 of the package 34 hold the transverse shaft 51 of the core of the package and slide on the sliding carriage 55 away from the drive roller 33 as the diameter of the package increases.
  • This movement can be controlled by suitable detection system which detects the diameter of the package and controls the actual location of the carriage or alternatively simply the pressure from the package on the roller may push the sliding carriage 55 away from the drive roller 33 bearing in mind that it is desirable to provide very low friction in the sliding carriage 55 to ensure that the pressure of the against the drive roller 33 remains constant and at a required value.
  • an empty core 36A is located in the holder 37 at a position above the drive roller 33.
  • Each of the holders 37 and 49 comprises a pair of jaws with V shaped facing surfaces which clamp onto the transverse shaft 51 of the winding package and a corresponding transverse shaft 51 A of the empty core.
  • Each shaft has a portion projecting outwardly beyond the end of a roller forming the core so that it can be grasped by the jaws and held with the axis of the roller of the core parallel to the axis 33A of the roller 33.
  • the holder 37 is mounted on a carriage 37A which can slide upwardly and downwardly from a raised position as shown in Figure 6 to a lowered position in which the roller of the empty core 36A is located slightly above the roller 33 ready for triggering a winding transfer.
  • the lowered position is not shown for convenience of illustration but it will be appreciated that the carriage 37A moves downwardly so that ends of the carriage are beyond the ends 33A of the drive roller 33 as best shown in Figure 3.
  • a trap member 36B defining two hooks into which an empty core is dropped from the magazine 35.
  • the trap 36B is then pivoted about a mount 36C to one side allowing the holder 37, the carriage 37A and the grasped core to move downwardly to a position just above the drive roller 33.
  • the core is held just above the roller so that it does not interfere with normal winding action and it is not required to rotate unnecessarily during this time. However the core is immediately ready for cooperating in the transfer winding as soon as this is triggered by the control system to activate the cutting section 46.
  • the cutting section 46 When a transfer action is triggered, the cutting section 46 is actuated and cuts the leading ends and trailing ends previously described. These leading and trailing ends continue through the winding machine until the trailing end indicated at T in Figure 6 passes the adhesive applicator 48 and moves under the empty core 36 to complete winding on the package 34. As the trailing end T passes, the adhesive applicator 48 is activated to apply adhesive onto the leading end L and particularly the outer surface of that leading L facing away from the drive roller 33. The application does not need to be immediately at the junction between the trailing and leading ends since this could if mistimed apply adhesive onto the trailing end but can be left for a short instant until it is fully clear that the trailing end has passed for supplying the adhesive onto the leading end or just behind the leading end.
  • the empty core is dropped by movement of the carriage 37A onto the surface of the drive roller 33 so that the trailing end passes underneath the empty core and the core is accelerated immediately to roller speed.
  • the leading end L and its transverse band of hot melt adhesive reaches the surface of the empty core, it is bonded to the empty core at the location of the empty core that it contacts.
  • This transfer therefore can occur at any point across the width of the empty core depending upon the location at that instant of the traverse system and is not necessary to time the transfer to any particular location in the traverse or on the drive roller 33 or on the package 34 along the core 36.
  • the adhesive applicator 48 includes a pump and heater of a conventional nature for generating a jet of hot melt adhesive material.
  • the jet can include a series of nozzles across the width of the strip arranged to apply a spray pattern across substantially across the full width of the strip so as to ensure proper adhesion to the empty core surface.
  • the empty core commences winding and winding continues on that core while the carriage 37A is pushed upwardly by the increasing diameter of the package on that core.
  • the transfer of the wound package 34 is effected by moving the sliding carriage 55 away from the drive roller 33 and by discharging the package 34 from its holder 49 onto the discharge frame 50.
  • the sliding carriage 55 is moved back to a position closely adjacent the drive roller 33 on the same circle surrounding the axis 33A of the drive roller 33 as is the holder 37.
  • the carriage 37A mounted on a pivot support frame 37B is pivoted about the axis 33A by a cylinder 37C.
  • the carriage 37A As the carriage 37A is mounted outboard of the sliding carriage 55, it moves to a position where the axis of the transverse shaft 51 A is aligned with the opened jaws of the holder 49 allowing the jaws 49 to be closed and the jaws 37 to be opened thus transferring the holding of the core from the empty core holder to the winding holder for winding to continue.
  • a control is also actuated controlling the rate of traverse of the frame 38 carrying the drive roller 33, the wound package and the empty core to take into account the necessity to increase the rate> of traverse necessary to accommodate the smaller diameter of the package now winding on the empty core (no longer empty) 36 as compared to the package winding on the wound package 34.
  • the cycle repeats in that the carriage 37A is moved to the raised position to obtain a further empty core and winding continues on the package 34 on the holder 49 until complete, or until winding breaks down due to a strip break.
  • the winding station as shown is independent of other winding stations for each of the other strips and its controls and motors can be controlled independently, bearing in mind that of course the winding speed must accommodate the strip supply speed which will be dependent upon the manufacturing line and therefore common control will be necessary.
  • the system is self threading in the sense that the insertion of a leading end of a strip into the mouth of the duct will cause that strip to be carried through the duct, extracted from the duct, carried through the conveyor system and applied into the winding head. At a start up situation therefore, the leading end will normally be transferred to the trim blower66 until the system is ready to actually commence winding on the empty core 36 whereupon a transfer procedure is activated.
  • a sensor can detect the breakdown of the strip and the leading end of the re-threaded strip and can activate the strip transfer system and particularly the adhesive applicator to commence winding on the empty core. For this reason, the winding stations 13 are independently driven so that the speed of traverse varies in dependence on the rate of rotation of the package on that station separately from the other stations to allow winding at different diameters on the different stations.
  • Different slit widths can be wound at the same time where the wound packages reach specified size at different times and can be doffed at different times.
  • winding stations can also be used for example using a center drive for the package core rather than the surface drive provided by the roller.

Landscapes

  • Replacement Of Web Rolls (AREA)
  • Winding Of Webs (AREA)

Abstract

La présente invention concerne un procédé d'enroulement en continu d'une largeur de bande issue d'une bande qui consiste à envoyer une bande en provenance d'une alimentation, à séparer cette bande longitudinalement en une pluralité de largeurs de bandes, et à transporter chacune de ces largeurs de bande vers une station d'enroulement. A chaque station d'enroulement, la largeur de bande est enroulée sur un noyau en un ensemble cylindrique dans lequel la largeur de bande présente une course axiale par rapport au noyau tandis qu'elle s'enroule autour de ce noyau. Pendant que la bande continue à être envoyée et séparée en largeurs de bande, l'enroulement des ensembles continue, alors qu'on transfère la largeur de bande d'un ensemble enroulé vers un noyau vide. Le système d'alimentation et de transport peut utiliser un flux d'air pour diriger et transférer la largeur de bande le long d'un conduit entre les stations, la largeur de bande étant retirée du conduit par un convoyeur transversal perméable à l'air formé par des courroies parallèles. La largeur de bande est coupée par une lame de couteau d'emporte pièce transversale qui tourne sur un support autour d'un axe transversal à la bande et qui accélère avec la vitesse de cette bande. la station d'enroulement possède un enfileur automatique et le transfert peut s'effectuer à tout moment sur une cassure de bande. Après le début de l'enroulement, le noyau vide sur son porteur est déplacé et transféré vers un porteur d'ensemble enroulé sur lequel l'enroulement continue. Par cet agencement, l'ensemble du système peut fonctionner automatiquement de façon à alimenter en continu la bande et former une série d'ensembles de largeurs de bande enroulées.
PCT/CA2001/001378 2000-09-29 2001-10-01 Enroulement de bande WO2002026608A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001293582A AU2001293582A1 (en) 2000-09-29 2001-10-01 Winding of strip material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US67282500A 2000-09-29 2000-09-29
US09/672,825 2000-09-29

Publications (2)

Publication Number Publication Date
WO2002026608A2 true WO2002026608A2 (fr) 2002-04-04
WO2002026608A3 WO2002026608A3 (fr) 2003-01-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2001/001378 WO2002026608A2 (fr) 2000-09-29 2001-10-01 Enroulement de bande

Country Status (2)

Country Link
AU (1) AU2001293582A1 (fr)
WO (1) WO2002026608A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2295356A3 (fr) * 2009-09-10 2011-11-23 Voith Patent GmbH Procédé et dispositif destinés au remplacement de bobines d'enroulement
US10239726B2 (en) 2016-06-15 2019-03-26 Dynamex Corporation Ribbon self-orienting device for traversed rolls

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3414636A1 (de) * 1983-05-04 1984-11-22 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Spulenwechsel beim aufwickeln von durch zerschneiden einer folienbahn erzeugten folienbaendchen
EP0649807A2 (fr) * 1993-10-21 1995-04-26 Sumitomo Rubber Industries Limited Procédé et dispositif de bobinage d'un ruban étroit
JP2000238038A (ja) * 1999-02-23 2000-09-05 Kunitsugu Yanagisawa プラスチック成形フィルムの耳部連続巻取り装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3414636A1 (de) * 1983-05-04 1984-11-22 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Spulenwechsel beim aufwickeln von durch zerschneiden einer folienbahn erzeugten folienbaendchen
EP0649807A2 (fr) * 1993-10-21 1995-04-26 Sumitomo Rubber Industries Limited Procédé et dispositif de bobinage d'un ruban étroit
JP2000238038A (ja) * 1999-02-23 2000-09-05 Kunitsugu Yanagisawa プラスチック成形フィルムの耳部連続巻取り装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 12, 3 January 2001 (2001-01-03) -& JP 2000 238038 A (YANAGISAWA KUNITSUGU), 5 September 2000 (2000-09-05) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2295356A3 (fr) * 2009-09-10 2011-11-23 Voith Patent GmbH Procédé et dispositif destinés au remplacement de bobines d'enroulement
US10239726B2 (en) 2016-06-15 2019-03-26 Dynamex Corporation Ribbon self-orienting device for traversed rolls

Also Published As

Publication number Publication date
WO2002026608A3 (fr) 2003-01-09
AU2001293582A1 (en) 2002-04-08

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