EP0733571B1 - Bahnwickelvorrichtung - Google Patents

Bahnwickelvorrichtung Download PDF

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Publication number
EP0733571B1
EP0733571B1 EP96108947A EP96108947A EP0733571B1 EP 0733571 B1 EP0733571 B1 EP 0733571B1 EP 96108947 A EP96108947 A EP 96108947A EP 96108947 A EP96108947 A EP 96108947A EP 0733571 B1 EP0733571 B1 EP 0733571B1
Authority
EP
European Patent Office
Prior art keywords
web
wind
tab
spindle
knife
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96108947A
Other languages
English (en)
French (fr)
Other versions
EP0733571A2 (de
EP0733571A3 (de
Inventor
Harvey D. Ogren
James L. Albrecht
Leonard M. Volin
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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
Priority claimed from US07/823,665 external-priority patent/US5379962A/en
Priority claimed from US07/823,379 external-priority patent/US5632849A/en
Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Priority to EP00100364A priority Critical patent/EP0999160B1/de
Publication of EP0733571A2 publication Critical patent/EP0733571A2/de
Publication of EP0733571A3 publication Critical patent/EP0733571A3/de
Application granted granted Critical
Publication of EP0733571B1 publication Critical patent/EP0733571B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H19/29—Securing the trailing end of the wound web to the web roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/10—Means for treating work or cutting member to facilitate cutting by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/27—Means for performing other operations combined with 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
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • 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
    • B65H19/2238—The web roll being driven by a winding mechanism of the nip or tangential drive 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
    • B65H19/22—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
    • 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
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/417—Handling or changing web rolls
    • B65H2301/4187—Relative movement of core or web roll in respect of mandrel
    • B65H2301/4189—Cutting
    • B65H2301/41894—Cutting knife moving on circular or acuate path, e.g. pivoting around winding roller
    • 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
    • B65H2408/231—Turret winders
    • B65H2408/2312—Turret winders with bedroll, i.e. very big roll used as winding roller
    • 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
    • B65H2701/30—Handled filamentary material
    • B65H2701/37—Tapes
    • B65H2701/377—Adhesive tape

Definitions

  • the present invention relates to a web winding apparatus. More particularly, the present invention relates to a log roll winder having a cutting system, a tab applicator, and a winding system.
  • PSA Pressure sensitive adhesive
  • log rolls which may, for example, measure 61 cm wide (24 in) or 122 cm wide (48 in). These log rolls are later cut into many individual rolls (each 2.5 cm wide, for example) for distribution and sale.
  • a web is typically wound onto a core until a predetermined length of web has been wound thereon to form a log roll.
  • the web is then stopped and cut transversely, so that the log roll can be removed.
  • a tab member which could be a piece of paper, may then be applied along the end of the web on the log roll to facilitate grasping of the end of the web.
  • the log roll may then be replaced by a new core, and the leading cut end of the web may be adhered to the core and the web wound therearound to begin a new log roll.
  • Known log roll winders of the type described above have exhibited several deficiencies relating to three distinct systems within the winder.
  • the systems which will be discussed further below, are the cutting system for cutting the web across its entire width, the tabbing system for applying a tab at a cut end of the web across its width, and a winding system for handling the web before, during, and after the cutting and tabbing operations.
  • the web is threaded onto a rotating vacuum drum with the adhesive side of the web facing away from the drum.
  • the web is cut by rotating a knife against the rotating drum while the web is disposed against the surface of the drum.
  • the vacuum force exerted by the drum against the web holds the cut ends of the web in place to prevent wrinkling.
  • This low strength boundary layer of adhesive next to the knife allows the material being slit to continuously wipe most of the adhesive from the knife.
  • a thin layer of adhesive still remains on the knife, which is undesirable.
  • the adhesive becomes increasingly soft, and the adhesion problem worsens.
  • the present invention does not directly relate to longitudinal slitting, but rather to transverse cutting, which is periodic rather than continuous.
  • the continuous self-cleaning dragging and wiping action of adjacent adhesive present with longitudinal slitting does not exist with transverse cutting. Without it, adhesive softened by heating tends to coat the knife and be pressed through the web onto the drum, which requires unacceptable cleanup.
  • the Dienes Werke catalog referenced above also discloses a very high temperature knife called an "element” which can be heated up to 750°C (1382°F). This high temperature carbonizes the adhesive coating and backing layer of the web.
  • the Dienes Werke catalog discusses using the element to "separate” the material and “fuse” or seal the strands on the edge of woven material to prevent unraveling, as with cutting a typewriter ribbon.
  • the tab is typically a narrow strip of material, such as paper, that is applied to the PSA coated side of the web and extends across the width of the log roll.
  • a pressure sensitive adhesive tape is wound on a log roll and then slit into smaller, individual rolls, it may be desirable to provide a tab at the end of the adhesive tape so that a consumer can grasp the end of the tape.
  • a non-adhesive web it may be desirable to provide an adhesive tab on the end of the web that will first contact the core, to anchor the web to the core prior to winding.
  • tabbing systems typically apply the tabs to a log roll either manually or from a magazine prior to cutting the web. Tab application is sometimes performed with the web stopped and sometimes with the web moving. Regardless, the tab is applied as a separate operation before the web is cut to terminate the log roll. Thus it is very difficult to obtain proper registration between the cut and the location of the tab, which is undesirable. It is therefore desirable to provide a tabbing system for use with a log roll winder wherein a tab may be applied to a cut end of the web while the web is moving, while avoiding the registration problems of the prior art.
  • the finished log roll must be removed from the winding area, and an empty core must be positioned to receive the leading cut end of the web to begin a new log roll.
  • the web speeds are substantial (120 m/min, for example), and the speed required to remove a full roll and replace it with an empty core is quite difficult to obtain.
  • the full roll is often removed before the terminal cut end of the web is completely adhered to the log roll.
  • such a procedure may not allow the log roll winder to guide the terminal cut end of the web, and thus the web may wrinkle or fold over, which is undesirable.
  • One roll winder made by Stahlechr Maschinenbau GmbH, attempts to overcome the foregoing problems by winding the web at a single wind-up station.
  • the web, drum, and wind-up roll stop for the web to be cut.
  • the drum and wind-up roll resume turning to wind up the tail of the web, while the incoming web remains stopped.
  • the wind-up roll is unloaded, and an empty core is loaded in its place.
  • the winder begins winding the incoming web on the new core. While having its own utility, this winder does not cut and transfer web on the fly.
  • a web winding apparatus forming the preample of claim 1 hereto is disclosed in GB-A-1207080.
  • the log roll winder of the present invention includes three related systems: a web cutting system, a tabbing system, a tail gap winding system.
  • the cutting system of the present invention overcomes the adhesion, accumulation, and transfer problems in continuous log roll winders by cutting the web with a knife heated to temperatures above that required for softening the adhesive yet below that at which the adhesive carbonizes. For some PSA tapes, this temperature would be above approximately 149°C (300°F).
  • the web is threaded onto a rotatable drum with the adhesive side facing away from the drum.
  • the web is carried with the drum, typically by a vacuum force exerted by the drum on the tape, and the tape is cut by rotating a knife against the drum while the web is disposed against the surface of the drum.
  • the drum holds the cut ends to prevent wrinkling.
  • a cutting and tabbing assembly both cuts the web against the rotating drum as the web rotates, and cuts and applies the tab on the web in registration with a cut end of the web.
  • the cutting and tabbing assembly includes a wheel, a knife mounted on the wheel, and a tab bar mounted on the wheel adjacent the knife.
  • the tab bar includes a vacuum source which holds the tab paper.
  • the tab paper is in the form of a roll which is mounted on an unwinder adjacent the wheel.
  • the wheel During the winding of the web on its core, the wheel is located in the tab-receiving position and the unwinder is spaced from the wheel. After the unwinder unwinds the proper amount of tab paper, the tab paper is threaded between the knife and the unwinder. The unwinder is then moved to contact the knife and tab bar. As the tab paper contacts the knife, the knife cuts a tab from the tab paper and the tab is held on the tab bar.
  • the wheel rotates toward the web-cutting position in which the knife can cut the web. As the wheel rotates, the tab bar transports the tab to the web. When the wheel reaches the web, the tab is applied and the knife contacts and cuts the web. The tab bar applies the tab onto the web in registration with a cut end of the web. The knife and tab bar continue to rotate until reaching its beginning position, and the sequence can begin again.
  • the winding system of the present invention creates a gap between the cut ends of the web on the surface of the drum during the cut and transfer operation of the winder.
  • the web is always supported during the time that the web is cut, and the leading cut end is transferred to a new core. This enables the winder to cut and transfer the web on the fly at speeds of 137.2 m/min (450 ft/min) or more. This also permits winding and cutting the web against the drum and without wrinkling the web.
  • the web first passes around a spreader roller, if needed, and then travels to and around the retractable idler roller before being wrapped partially around the rotating drum.
  • the rotating drum passes the web onto a core located on one of the two wind-up spindles.
  • the knife rotates at a surface speed equal to the surface speed of the rotating drum.
  • the knife cuts the web as it rotates against the rotating drum and a tab is applied.
  • the idler roller pivots on its pivoting arm away from the rotating drum to increase the distance between the idler roller and the drum.
  • the idler roller pivots at a speed approximately equal to the web speed. This causes one end of the web to slide on the surface of the drum.
  • a vacuum is applied to the web through the rotating drum to keep the web in contact with the drum during winding.
  • the vacuum controls the sliding force and maintains a constant line tension.
  • the first wind-up spindle is moved away from the drum surface as soon as the terminal cut end of the web is attached to the log roll. This causes the leading cut end of the web to bypass the first winding station and continue on to the core located on the second wind-up spindle.
  • the second wind-up spindle is moved into contact with the rotating drum surface as the first wind-up spindle moves away, and the leading cut end adheres to and begins wrapping around the core on the second wind-up spindle.
  • the idler roller slowly returns toward the rotating drum.
  • the distance between the idler roller and rotating drum decreases while the drum speed increases slightly to maintain constant line tension and to take up the extra length of web.
  • the knife cuts the web
  • the idler roller is pivoted to its gap position to slide the web on the surface of the rotating drum and create a tail gap.
  • the first wind-up spindle is moved into contact with the drum surface as the terminal cut end of the web passes the first wind-up spindle location to cause the leading cut end of the web to wind on the first wind-up spindle.
  • the second wind-up spindle remains in contact with the rotating drum until the terminal cut end of the web is completely wound around its core.
  • the winding system 10 of the present invention can be used in conjunction with most known tapes. After the web 12 is processed it is to be wound on cores 14.
  • the present winding system 10 permits cutting, tabbing, and winding the web 12 on cores 14, and transferring the web between cores 14 on the fly.
  • Numerous rollers 16 may be provided, only one of which is shown in the illustrated embodiment.
  • the winding system 10 also includes a stationary gapping roller 18 around which the web 12 winds. The roller 18 can serve to spread the web 12 and eliminates wrinkles before the web 12 travels to the rotating drum 24.
  • a tension sensor 20 is mounted on one roller 16 to measure web tension and adjust the speed of the rotating drum 24 to maintain a desired tension in the web.
  • the web 12 then travels to a retractable primary gapping roller or idler roller 22 which is disposed downline of the roller 18.
  • the idler roller 22 is pivotable on a radius centered at the center of the roller 18.
  • the idler roller 22 and the roller 18 have the same diameter, and thus the same circumference.
  • a rotating drum 24 is disposed downline of the idler roller 22 such that the web 12 travels in contact with a portion of the outer surface 26 of the rotating drum 24 after passing the idler roller 22.
  • Surface 26 covered with urethane rubber or other material which supports the web 12 such that a cutting knife will penetrate the web 12 when the knife is pressed against the web 12.
  • the drum surface 26 can be steel if the knife travel is precisely controlled to avoid knife damage.
  • the surface 26 can have a narrow groove that would engage the knife such that the edges of the groove would support the web 12 close to the cut while the cut is made in the open air space between the edges of the groove.
  • the web 12 can have an adhesive side, such as PSA, which faces outwardly when the web 12 is wrapped around the drum 18. This prevents the web 12 from adhering to the drum surface 20 and permits the leading end of web 12 to transfer to the cores 14 by adhesion. Adhesion transfer to the cores 14 with nonadhesive webs can be accomplished by placing adhesive directly on the cores. Alternatively, an adhesive tab can be applied to the leading cut end of the web to secure adhesion to the core.
  • the drum 24 includes a series of holes 48 on its surface 26 which are connected to a source of vacuum 50 through the drum 24. The vacuum provides a mechanism for maintaining the web 12 in contact with the drum 24 during winding.
  • Two wind-up spindles 28, 30 are located adjacent the rotating drum 24 and receive the cores 14 on which the web 12 is wound to form the log rolls.
  • the first wind-up spindle 28 is located relatively upline of the second wind-up spindle 30.
  • Both wind-up spindles 28, 30 are movable between a first position wherein the core supported thereon is in contact with the rotating drum 24, and a second position wherein the core (or log roll) is spaced away from the rotating drum 24.
  • a turret can be used to hold several wind-up stations and to load and unload the wind-up spindles continuously.
  • a cutting knife 32 is located upline of both wind-up spindles 28, 30 and cuts the web 12 as the web 12 rotates against the rotating drum 24.
  • the knife 32 is mounted on a rotating wheel 34.
  • the knife 32 cuts the web 12 against the rotating drum 24 which holds the terminal cut end 36 and the leading cut end 36' of the web 12 to prevent wrinkling. Due to the speed required for transverse cutting of the web against a rotating drum, the knife 32 should cut by pressing or stabbing through the adhesive coated web 12.
  • the cut and transfer can be performed on the fly without stopping the winding process, such that the rolls can be wound on line and at machine speeds on a continuous basis.
  • a particularly advantageous feature of the present web cutting system is that a heater 35 heats the knife 32 to improve cutting.
  • the winder can cut and transfer on the fly without stopping the winding process while overcoming the adhesion, accumulation, and transfer problems previously described.
  • this temperature would be above 149°C (300°F).
  • the present heated cutting system achieves the desired results because one of the major adhesive components melts when the adhesive contacts the knife. This melting changes the rheology of the adhesive much more than simply softening the adhesive with slightly elevated temperature. Furthermore, the adhesive component that melts can become a lubricant next to the knife.
  • This cutting system can be used on continuous or noncontinuous-speed drum winders, with slit or unslit webs, and with or without adhesive-coated webs.
  • the heated knife also can be used to cut any type of web in the air or against a backing.
  • the cutting of nonsticky and nonorganic webs, such as glass cloth, is also improved by the heated knife.
  • a tabbing system is also provided for applying a tab member to one or both of the cut ends 36 and 36' of web 12.
  • a cutting and tabbing assembly is located upline of both wind-up spindles 28, 30. After knife 32 cuts the web 12 against the rotating drum 24 as the web 12 rotates thereover, the assembly cuts a tab 60 from a roll 62 of tab paper 64 and applies the tab on the web 12 in registration with a cut end 36 of the web 12. In the illustrated embodiment, the tab is applied in registration with the terminal cut end 36 of the web, but could be applied to the leading cut end 36' of the web instead of or in addition to terminal cut end 36.
  • the cutting and tabbing assembly 26 includes a wheel 34 which rotates as described above. A knife 32 is mounted on the wheel 34.
  • a tab bar 52 is mounted on the wheel 34 adjacent the knife 32 and has a mechanism which holds the tab paper 60.
  • this mechanism includes a source of vacuum 66 connected to the surface 68 of the tab bar 52 through a series of openings on the surface 68.
  • the roll of tab paper 62 is mounted on an unwinder 70 adjacent the wheel 34. Adhesive webs 12 permit the tab to be adhered to the web without adhesive on the tab, although a nonadhesive web and an adhesive tab may also be used.
  • the unwinder 70 includes the roll 62 of tab paper 64, a backup roller 72 located near the roll 62 of tab paper 64, and a tab paper guide 74 extending from the roll 62 of tab paper 64 to and around a portion of the backup roller 72.
  • the unwinder 70 is translatable from a first position spaced from the knife 32 to a second position adjacent and contacting the knife 32.
  • the unwinder 70 unwinds the proper amount of tab paper 64 to form a tab 60 for application on each log roll 40 during the winding of the web 12 on cores 14.
  • the wheel 34 is located in the tab-receiving position and the unwinder 70 is in its first position spaced from the wheel 34.
  • the tab paper 64 is threaded between the knife 32 and the unwinder 70, as shown in Figure 1A.
  • the unwinder 70 is then moved to the second position in contact with the knife 32 and tab bar 52 while the knife 32 and tab bar 52 remain stationary, as shown in Figure 1B.
  • the knife 32 cuts a tab 60 from the tab paper 64 and the vacuum 66 on the tab bar 52 holds the tab 60 against surface 68 of tab bar 52.
  • the unwinder 70 then returns to its first position.
  • the tab 60 is held on the tab bar 52, and when the desired length of web 12 has been wound on a core 14, the wheel 34 rotates toward the web-cutting position in which the knife 32 can cut the web 12, as shown in Figure 1C. As the wheel 34 rotates, the tab bar 52 transports the tab 28 to the web 12. As shown in Figure 1D, as the wheel 36 reaches the web 12, the tab 28 is applied and the knife 38 contacts and cuts the web 12. The tab bar 52 applies the tab 60 onto the web 12 in registration with a cut end 36, 36' of the web 12. The adhesive on the web 12 enables the tab 60 to adhere to the web 12. The knife 32 and tab bar 52 continue to rotate until reaching the position shown in Figure 1E, which is identical to that shown in Figure 1A, and the sequence can begin again. Because the drum 24 holds the cut ends 36, 36' of the web 12 to prevent wrinkling, the cut and transfer can be performed on the fly without stopping the winding process, such that the log rolls 40 can be wound on line and at machine speeds on a continuous basis.
  • This tabbing system precisely cuts and applies tabs along the full width of the cut end of a log roll from a full width roll of tab paper using a simple configuration that is integrated with the web cutting assembly.
  • This system has the following advantages over precut tabs.
  • This tabbing system can be used with continuous on-line log roll winders as well as with more conventional noncontinuous log roll winders and rewind slitters. Excellent tab placement accuracy is provided, because the same knife cuts both the tab and the web. Separate tab slitting steps are eliminated because the tabs are cut from a full width roll and individual strips of precut tabs need not be handled.
  • thermoplastic ink 80 can be applied to the web 12 to serve as the tab 82.
  • the tab bar 52 has a smooth surface 68.
  • the sequence of operation for this embodiment is similar to that of the paper tab embodiment explained above with respect to Figure 1.
  • an ink jet printer 84 applies the ink 80 to the tab bar 52 by traversing across the tab bar 52.
  • the tab bar 52 applies the ink 80 to the web 12 during the cutting operation.
  • the ink 80 can be applied directly to the web 12 from the printer 84 if the web is stopped.
  • the ink 80 adheres to the adhesive on the web 12, forming a non-tacking surface that acts as a tab 82 on the end of the roll.
  • the wheel 34 continues to its tab-receiving position to begin the cycle again.
  • the ink jet printer 84 can start and stop as it traverses across the web 12, tab printing can be adapted to the duplex cut and wind process in which the web 12 is preslit into predetermined widths and the ink tabs 82 are printed along the total width as the web 12 is cut.
  • the starting and stopping of the printing can be aligned easily with each cut off knife and can be easily changed as the slit web width is changed by programming the printing head of the printer 84, which applies the ink onto the tab bar 52.
  • the tab can be applied to alternate preslit strands while not being applied to the remaining strands.
  • the tab ink or other material could be an adhesive to adhere the last wrap of the web to its roll.
  • a tab bar and tab could be applied to the leading cut end 36' to be wound against the core, and could thus adhere the first wrap of a nonadhesive web to the core.
  • curable coatings can be used as the tab. The coatings could cure using light, chemical reactions, radiation, or heat. Detackifiers such as glass beads or talc also could be used.
  • PSA Pressure sensitive adhesive
  • present winding apparatus includes means for providing a gap, known as a tail gap, between the terminal cut end 36 and the leading cut end 36' of the web.
  • the idler roller 22 is mounted on an arm 42 which pivots around the center of the roller 18. The idler roller 22 pivots from a first position in which winding occurs to a second position that lengthens the distance, known as the pass line, between the idler roller 22 and the rotating drum 24 to create a gap 44 between the cut ends 36 and 36' of the web 12.
  • the idler roller 22 pivots to lengthen the pass line, enabling the web 12 to slide on the surface 26 of the rotating drum 24 and create the gap 44 between the cut ends 36 and 36' of the web 12.
  • the idler roller 22 is pivoted by an index mechanism 46, which can be a mechanical cam or an electrical drive such that the pivot speed is a function of the line speed.
  • the rotating drum 24 includes a series of holes 48 on its surface which are connected to a source of vacuum 50 through the rotating drum 24, as described previously.
  • the vacuum 50 provides a mechanism for increasing the frictional force between the web 12 and the rotating drum 24, and for maintaining the web 12 in contact with the rotating drum 24 during winding.
  • the vacuum 50 controls the sliding force of the web 12 on the rotating drum 24 and to maintain a constant line tension.
  • the web transfer between cores mounted on the first and second wind-up spindles is provided as follows.
  • the web 12 begins winding around and onto a core 14 that is mounted on the wind-up spindle 28 as shown in Figure 1A.
  • the first wind-up spindle 28 is located against the rotating drum 24, while the second wind-up spindle 30 is spaced from the rotating drum 24.
  • the web 12 will adhere to its core 14 on the wind-up spindle 28.
  • the knife wheel 34 rotates at a surface speed equal to the surface speed of the rotating drum 24.
  • the knife wheel 34 is rotated at a speed matched to the speed of the drum 24 by a knife drive (not shown) which is linked either mechanically or electrically to the drum 24.
  • the knife drive is actuated when a predetermined length of web 12 has been wound.
  • the knife wheel 34 is shifted into and out of engagement with the drum 24 to cut web 12, as described previously.
  • the cutting edge of the knife 32 contacts the web 12.
  • the knife 32 cuts the web 12 as the web 12 rotates against the rotating drum 24, and a tab 38 is applied to the cut end of the web by a tab bar 52 which, as shown, can be located on the rotating wheel 34 adjacent the knife 32.
  • the tab bar 52 applies a tab onto the web 12 in registration with a cut end 36 of the web 12.
  • Alternative tab application assemblies can be used.
  • the idler roller 22 is pivoted on its pivoting arm 42 on a radius centered at the center of the roller 18 away from the rotating drum 24 to lengthen the pass line between the idler roller 22 and the drum 24.
  • the idler roller 22 pivots at a speed approximately equal to the web speed. This causes the web 12 to slide on the surface 26 of the drum 24. Because the rotating drum 24 continues to rotate at a constant speed, the pivoting motion of idler roller 22 creates a gap 44 between the cut ends 36 and 36' of the web 12 as shown in Figure 1D.
  • the gap 44 is equal to the pass line length increase. Typically, this increase, and therefore the gap 44 is 15 cm (6 in).
  • the first wind-up spindle 28 is moved away from the drum surface 26 as the terminal cut end 36 passes the first wind-up spindle location. This causes the leading cut end 36' of the web 12 to bypass the first wind-up spindle 28 and continue on to the second wind-up spindle 30.
  • the core 14 mounted on the second wind-up spindle 30 is moved into contact with the rotating drum surface 26 as the first wind-up spindle 28 moves away, and the leading cut end 36' adheres to the core 14 on the second wind-up spindle 30 and begins wrapping around the core 14.
  • the idler roller 22 slowly pivots toward the rotating drum 24 and returns to its original position, as shown in Figure 1F. As the idler roller 22 moves toward this position, the pass line length between the idler roller 22 and rotating drum 24 decreases, while the speed of the drum 24 increases slightly to maintain constant line tension and to take up the extra length of web 12.
  • the drum speed increase depends on the actual return speed and is accomplished in the drive for the drum as modified by the tension sensor signal.
  • the winding is transferred from the second wind-up spindle 30 to the first wind-up spindle 28.
  • the knife wheel 34 rotates to rotate the knife 32 into contact with the web 12 to cut the web 12, as shown in Figure 1G.
  • the idler roller 22 pivots away from the rotating drum 24 to lengthen the pass line between the idler roller 22 and the drum 24 by sliding the web 12 on the surface 26 of the rotating drum 24 and create a gap 44.
  • the core 14 mounted on first wind-up spindle 28 is moved into contact with the rotating drum surface 26 as the terminal cut end 36 passes the first wind-up spindle location to cause the leading cut end 36' of the web 12 to wind on the first wind-up spindle 28.
  • the second wind-up spindle 30 remains in contact with the rotating drum 24 until the terminal cut end 36 of the web 12 is completely wound around the log roll 40. Then the second wind-up spindle 30 moves away from the rotating drum 24.
  • the idler roller 22 slowly returns to its position of short pass line shown in Figure 1A, and the cycle begins anew.
  • This winding system 10 increases the time available to perform the transfer between the two wind-up spindles 28, 30 with a greatly simplified design.
  • the cut ends 36 and 36' of the web 36 are pulled away from the knife 32 after the web 12 is cut to prevent the cut ends 36 and 36' from sticking to each other or to the knife 32.
  • the gap 44 prevents the web 12 from contacting the core 14 prematurely, and obviates the need to strip the web 12 off of the core 14 during any part of the cut and transfer cycle as with known drum winding equipment.
  • the cut and transfer is made on the fly at full line speed with the upstream web speed, and the rotational inertia through the roller 18 and idler roller 22 thus remains constant. This eliminates speed and inertia-related upsets from the upstream equipment.
  • This system can be used on continuous or noncontinuous-speed drum winders, with slit or unslit webs, and with or without adhesive-coated webs.
  • This system also can be used where turrets or other mechanisms move the wind-up spindles into wind-up position, as where the incoming wind-up spindle is moved into contact with the drum while the gap is at that spindle location.
  • the tail gap simplifies the transfer operation to a sufficient degree to obviate the need for turret mechanisms.
  • this winding system is simpler, less expensive, more versatile, and more reliable than known winding machines.
  • One winding system which can use this invention winds webs having widths of 63.5 cm (25 in) around paper or plastic cores that are 73.67 cm (29 in) long and have 7.62 cm (3 in) inner diameters.
  • the core wall thickness can range from 0.25 to 1.02 cm (0.10 to 0.40 in), and rolls of up to 43.2 cm (17 in) in diameter can be formed with the actual size being operator selectable.
  • As there are no thickness or material limitations on the web, glass and cotton cloth, nonwoven films, composites, and webs with high strength backings with thick adhesive can be used.
  • Web winding speeds of up to 120 m/min (400 ft/min) have been attained.
  • the system can cycle by removing a full log on a core and loading a new core in 8 seconds and can wind with center winding or surface winding with center assist.
  • Center winding and center assisted winding refer to the rotational movement of the wind-up spindles being independently provided by those spindles, as opposed to by contact of the log roll with the drum 24.
  • This winding system 10 provides a gap without causing web tension upsets from changes in roll inertia due to starting and stopping the line. Because the rotational inertia of the rotating drum 24 remains constant throughout the gap generation, there is no inertial change to impart web tension upsets to the web 12. This is accomplished simply by the geometry of the system 10. Roll inertia problems can be overcome by other systems. For example, a precision drive could be used on each roller affected by rotational speed changes to power the roller at the precise speed profile required to match the web speed at that roller and prevent roll inertia from upsetting web tension. Also, rollers could be replaced by slider or floatation bars on which the web freely slides to avoid upset web tension.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Replacement Of Web Rolls (AREA)

Claims (14)

  1. Bahnwickelsystem (10) zum Wickeln einer Bahn (12) auf Kerne (14), die an entsprechenden ersten und zweiten Aufwickelspindeln (28, 30) angebracht sind, sowie zur Übertragung der Bahn auf schwebende Weise zwischen den Kernen, wobei das System folgendes umfaßt:
    (a) eine erste Walze (18), um welche die Bahn gewickelt wird;
    (b) eine Drehtrommel (24), die hinter bzw. nach der ersten Walze angeordnet ist, so daß die Bahn in Kontakt mit einem Teilstück der Oberfläche (26) der Drehtrommel verläuft;
    (c) eine drehbare Einrichtung (32) zum Schneiden der Bahn;
    (d) eine Mitläuferwalze (22), die zwischen der ersten Walze und der Drehtrommel angeordnet ist, um welche die Bahn gewickelt wird;
    (e) eine Einrichtung zur Übertragung der Bahn von einem an der ersten Aufwickelspindel (28) angebrachten Kern zu einem an der zweiten Aufwickelspindel (30) angebrachten Kern;
    (f) dadurch gekennzeichnet, daß die Mitläuferwalze (22) zu und von einer Drehtrommel (24) beweglich ist, wobei eine Einrichtung zur Bewegung der Mitläuferwalze (22) von der Drehtrommel weggehend vorgesehen ist, und zwar unmittelbar nach dem die Bahn geschnitten worden ist, so daß der Abstand zwischen der Mitläuferwalze und der Drehtrommel vergrößert wird, damit die Bahn auf der Oberfläche der Drehtrommel gleiten kann, wodurch zwischen den abgeschnittenen Enden der Bahn ein Zwischenraum erzeugt wird.
  2. Bahnwickelsystem (10) nach Anspruch 1 zum Wickeln einer Bahn mit Kleberücken auf Kerne, die an den entsprechenden ersten und zweiten Aufwickelspindeln angebracht sind, so daß die Bahn zerschnitten und ein Streifen bzw. ein Anfasser an der Bahn in Paßgenauigkeit mit einem abgeschnittenen Ende der Bahn aufgetragen wird, und für einen schwebenden Transport der Bahn zwischen den Kernen, wobei die drehbare Einrichtung zum Zerschneiden der Bahn ein Drehmesser (32) zum Schneiden der Bahn umfaßt, so daß ein vorderes abgeschnittenes Ende und ein hinteres abgeschnittenes Ende vorgesehen werden, und wobei das Bahnwickelsystem ferner folgendes umfaßt:
       (g) ein System zum Vorsehen eines Streifens bzw. eines Anfassers zum Auftragen eines Streifens an der Bahn, und zwar in Paßgenauigkeit mit einem abgeschnittenen Ende der Bahn; wobei dieses System folgendes umfaßt:
    (i) eine Streifenstange (68), die angrenzend an das Messer angebracht ist;
    (ii) eine Streifenquelle (70);
    (iii) eine Einrichtung zum Bewegen der Streifenquelle aus einer ersten Position, die einen Abstand zu dem Messer und der Streifenstange aufweist, an eine zweite Position, die angrenzend an das Messer und die Streifenstange vorgesehen ist, so daß die Streifenstange den Streifen (60) aufnehmen kann, während sich das Messer und die Streifenstange an der zweiten Position befinden; und
    (iv) eine Einrichtung zum Drehen des Messers und der Streifenstange aus der zweiten Position an eine Bahnschneideposition, so daß das Messer die Bahn zerschneiden kann, während die Streifenstange in Paßgenauigkeit mit einem abgeschnittenen Ende (36) der Bahn einen Streifen auf die Bahn aufträgt.
  3. Bahnwickelsystem (10) nach einem der Ansprüche 1 oder 2, wobei das System ferner folgendes umfaßt:
    eine erste Aufwickelspindel (28), an der ein Kern (14) angebracht werden kann, wobei die erste Aufwickelspindel zwischen einer ersten Position, an der sich ein an der Spindel angebrachter Kern in Kontakt mit der Drehtrommel (24) befindet, und einer zweiten, zu der Drehtrommel mit Zwischenabstand angeordneten Position, beweglich ist; und
    eine zweite Aufwickelspule (30), an der ein Kern (14) angebracht werden kann, wobei die zweite Aufwickelspule hinter bzw. nach der ersten Aufwickelspule angeordnet ist und zwischen einer ersten Position, an der sich ein an der Spindel angebrachter Kern in Kontakt mit der Drehtrommel (24) befindet, und einer zweiten, zu der Drehtrommel mit Zwischenabstand angeordneten Position, beweglich ist.
  4. Wickelsystem (10) nach Anspruch 1 oder 2, wobei die Einrichtung zur Übertragung der Bahn von einem an der ersten Aufwickelspindel (28) angebrachten Kern (14) an einen an der zweiten Aufwickelspindel (30) angebrachten Kern (14) eine Einrichtung zur Bewegung der ersten Aufwickelspindel von der ersten Position an die zweite Position umfaßt, wenn der Zwischenraum (44) die Position der ersten Aufwickelspindel passiert, eine Einrichtung zur Bewegung der zweiten Aufwickelspindel von der zweiten Position an die erste Position, wenn sich die erste Aufwickelspindel weg bewegt, und eine Einrichtung zum Wickeln des vorderen abgeschnittenen Endes (36') um den an der zweiten Aufwickelspindel angebrachten Kern.
  5. Wickelsystem (10) nach Anspruch 4, wobei das System ferner eine Einrichtung zur Übertragung der Bahn (12) von einem an der zweiten Aufwickelspindel (30) angebrachten Kern an einen an der ersten Aufwickelspindel (28) angebrachten Kern (14) umfaßt, mit einer Einrichtung zur Bewegung der ersten Aufwickelspindel von der zweiten Position an die erste Position, wenn der Zwischenraum (44) die Position der ersten Aufwickelspindel passiert, so daß das vordere Ende der Bahn auf einen an der ersten Aufwickelspindel angebrachten Kern gewickelt werden kann, mit einer Einrichtung zum Halten der zweiten Aufwickelspindel an der ersten Position, bis das hintere abgeschnittene Ende (36) der Bahn um die zweite Aufwickelspindel gewickelt worden ist, und mit einer Einrichtung zum Bewegen der zweiten Aufwickelspindel von der ersten Position an die zweite Position.
  6. Wickelsystem (10) nach Anspruch 1 oder 2, wobei die Mitläuferwalze (22) drehbar ist, und ferner mit einer Einrichtung zum Drehen der Mitläuferwalze in Richtung der Drehtrommel (24), so daß der Abstand zwischen der Mitläuferwalze und der Drehtrommel verringert wird, während die Geschwindigkeit der Trommel zunimmt, so daß eine konstante Bahnspannung aufrecht erhalten wird und um die Überlänge der Bahn (12) während dem Wickeln der Bahn aufzunehmen.
  7. Wickelsystem (10) nach Anspruch 1 oder 2, wobei die Drehtrommel (24) ein Vakuum umfaßt, das über die Drehtrommel auf die Bahn ausgeübt wird, wobei die Bahn auf der Drehtrommeloberfläche (26) gleitet, wenn die Mitläuferwalze (22) gedreht wird, und wobei das Vakuum die Gleitkraft der Bahn an der Drehtrommel regelt, um eine konstante Bahnspannung der Bahn aufrecht zu erhalten.
  8. Bahnwickelsystem (10) nach Anspruch 2, wobei die Streifenquelle (77) eine Streifenpapier-Abwickelvorrichtung aufweist, an der eine Rolle (62) des Streifenpapiers (64) angebracht ist, wobei die Streifenstange (68) eine Einrichtung zum Halten des Streifenpapiers umfaßt, und wobei die Einrichtung zur Bewegung der Abwickelvorrichtung von einer ersten Position an eine zweite Position es ermöglicht, daß das Messer (32) einen Streifen (60) von der Streifenpapierrolle abschneiden kann.
  9. Bahnwickelsystem (10) nach Anspruch 2, wobei die Streifenquelle (70) einen Tintenstrahldrucker (84) umfaßt, der Tinte auf die Streifenstange aufträgt.
  10. Bahnwickelsystem nach Anspruch 2, wobei das Messer (32) eine Einrichtung zum Zerschneiden der Bahn umfaßt, und mit einer Einrichtung, die es verhindert, daß der Klebstoff auf der Bahn an dem Messer kleben bleibt sowie daß sich der Klebstoff an dem Messer ansammelt.
  11. Bahnwickelsystem nach Anspruch 10, wobei die Schneideeinrichtung eine Klinge umfaßt, und wobei die Einrichtung zum Verhindern eines Klebenbleibens sowie einer Ansammlung eine Einrichtung umfaßt, welche die Klinge auf Temperaturen oberhalb der Temperatur erwärmt, bei der der Klebstoff weich wird sowie unterhalb der Temperatur, bei der der Klebstoff hart wird.
  12. Bahnwickelsystem nach Anspruch 11, wobei die Heizeinrichtung die Klinge auf Temperaturen zwischen 149°C und 232°C (300°F und 450°F) erhitzen kann.
  13. Bahnwickelsystem nach Anspruch 12, wobei die Einrichtung zum Verhindern eines Klebenbleibens sowie einer Ansammlung ferner eine Einrichtung umfaßt, die es verhindert, daß Klebstoff durch den Schnitt in der Bahn übertragen und auf der Trommel abgelagert wird.
  14. Bahnwickelsystem nach Anspruch 13, wobei die Einrichtung zum Verhindern einer Übertragung und die Einrichtung zum Verhindern eines Klebenbleibens sowie einer Ansammlung eine Einrichtung zur Erhitzung der Klinge auf Temperaturen umfaßt, die oberhalb der zur Erweichung des Klebstoffs sowie unterhalb der Temperatur liegen, bei der der Klebstoff hart wird.
EP96108947A 1992-01-21 1993-01-20 Bahnwickelvorrichtung Expired - Lifetime EP0733571B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00100364A EP0999160B1 (de) 1992-01-21 1993-01-20 Bahnwickelsystem

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US82396192A 1992-01-21 1992-01-21
US823379 1992-01-21
US07/823,665 US5379962A (en) 1992-01-21 1992-01-21 Heated web knife
US823961 1992-01-21
US07/823,379 US5632849A (en) 1992-01-21 1992-01-21 Tab applicator for log roll winders
US823665 1992-01-21
EP93904507A EP0620799B1 (de) 1992-01-21 1993-01-20 Vorrichtung zum Schneiden und Aufbringen eines Verbindungsstreifens für eine Bahnwickelvorrichtung

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP93904507.6 Division 1993-01-20
EP93904507A Division EP0620799B1 (de) 1992-01-21 1993-01-20 Vorrichtung zum Schneiden und Aufbringen eines Verbindungsstreifens für eine Bahnwickelvorrichtung

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP00100364A Division EP0999160B1 (de) 1992-01-21 1993-01-20 Bahnwickelsystem

Publications (3)

Publication Number Publication Date
EP0733571A2 EP0733571A2 (de) 1996-09-25
EP0733571A3 EP0733571A3 (de) 1996-12-27
EP0733571B1 true EP0733571B1 (de) 2000-09-20

Family

ID=27420155

Family Applications (3)

Application Number Title Priority Date Filing Date
EP00100364A Expired - Lifetime EP0999160B1 (de) 1992-01-21 1993-01-20 Bahnwickelsystem
EP96108947A Expired - Lifetime EP0733571B1 (de) 1992-01-21 1993-01-20 Bahnwickelvorrichtung
EP93904507A Expired - Lifetime EP0620799B1 (de) 1992-01-21 1993-01-20 Vorrichtung zum Schneiden und Aufbringen eines Verbindungsstreifens für eine Bahnwickelvorrichtung

Family Applications Before (1)

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EP00100364A Expired - Lifetime EP0999160B1 (de) 1992-01-21 1993-01-20 Bahnwickelsystem

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Application Number Title Priority Date Filing Date
EP93904507A Expired - Lifetime EP0620799B1 (de) 1992-01-21 1993-01-20 Vorrichtung zum Schneiden und Aufbringen eines Verbindungsstreifens für eine Bahnwickelvorrichtung

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EP (3) EP0999160B1 (de)
JP (1) JP3315407B2 (de)
AU (2) AU673156B2 (de)
CA (1) CA2127285C (de)
CZ (1) CZ175494A3 (de)
DE (3) DE69329470T2 (de)
HK (1) HK1006962A1 (de)
SK (1) SK88894A3 (de)
WO (1) WO1993014013A2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995015901A1 (en) * 1993-12-08 1995-06-15 Beloit Technologies, Inc. Method and apparatus for effecting a set change in a paper winder
US6632311B1 (en) * 1998-06-23 2003-10-14 3M Innovative Properties Company Tape roll tab application method and article
JP2000327187A (ja) * 1999-05-20 2000-11-28 Hagihara Industries Inc 細幅ウエブ巻取り装置
CN103930359B (zh) * 2011-11-01 2016-08-17 理研科技株式会社 卷尾处理装置以及方法及树脂制薄膜卷筒
EP4005957A1 (de) * 2020-11-25 2022-06-01 Allstein GmbH Verfahren zum schneiden einer laufenden bahn und schneideeinheit dafür

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Publication number Priority date Publication date Assignee Title
BE546676A (de) * 1955-04-04
GB1167767A (en) * 1966-03-08 1969-10-22 Scott Paper Co Method and Apparatus for Winding Webs
GB1137221A (en) * 1966-04-12 1968-12-18 Munksjoe Aktie Bolag A device for fixing the terminating end of paper rolls
US3369766A (en) * 1966-05-17 1968-02-20 Scott Paper Co Web winding
US3552670A (en) * 1968-06-12 1971-01-05 Scott Paper Co Web winding apparatus
FR2019873A1 (en) * 1968-10-04 1970-07-10 Castello Sas Automatic winding mechanism for extruded - plastic material
IT1051920B (it) * 1975-12-23 1981-05-20 Kores Spa Metodo per il bloccaggio sulle bobine per dattilografia nel riempimento industriale del lembo finale di nastro
DE2716703C3 (de) * 1977-04-15 1980-10-16 Dienes Werke Fuer Maschinenteile Gmbh & Co Kg, 5063 Overath Quetschmesserhalter mit Heizvorrichtung
DE2923559C2 (de) * 1979-06-11 1985-05-09 Dienes Werke für Maschinenteile GmbH & Co KG, 5063 Overath Heizbare Messeranordnung in einer Rollenschneidmaschine
FR2499958B1 (fr) * 1981-02-19 1985-06-14 Monomatic Sa Perfectionnements aux machines a enrouler des bandes de matiere en bobines
IT1167967B (it) * 1981-08-26 1987-05-20 Fabio Perini Ribobinatrice ad alta velocita' per nastri di carta in specie con perforazioni trasversali
US4712459A (en) * 1986-05-01 1987-12-15 Clamco Corporation Apparatus for severing wrapping film
US4807825A (en) * 1988-03-29 1989-02-28 Elsner Engineering Works, Inc. Roll winding machine

Also Published As

Publication number Publication date
CA2127285A1 (en) 1993-07-22
EP0999160A3 (de) 2000-05-24
JP3315407B2 (ja) 2002-08-19
CA2127285C (en) 2001-09-11
DE69329470D1 (de) 2000-10-26
AU673156B2 (en) 1996-10-31
AU681833B2 (en) 1997-09-04
DE69306752T2 (de) 1997-06-05
EP0999160B1 (de) 2002-12-11
HK1006962A1 (en) 1999-03-26
EP0733571A2 (de) 1996-09-25
WO1993014013A3 (en) 1994-01-06
AU3583893A (en) 1993-08-03
EP0620799A1 (de) 1994-10-26
EP0999160A2 (de) 2000-05-10
DE69329470T2 (de) 2001-04-19
DE69332572D1 (de) 2003-01-23
EP0733571A3 (de) 1996-12-27
CZ175494A3 (en) 1995-01-18
JPH07502958A (ja) 1995-03-30
EP0620799B1 (de) 1996-12-18
WO1993014013A2 (en) 1993-07-22
SK88894A3 (en) 1994-11-09
DE69306752D1 (de) 1997-01-30
AU6803096A (en) 1997-01-09
DE69332572T2 (de) 2003-07-31

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