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
  • B65H23/00—Registering, tensioning, smoothing or guiding webs
  • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
  • B65H23/06—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle
• • 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
  • B65H19/2207—Changing the web roll in winding mechanisms or in connection with winding operations the web roll being driven by a winding mechanism of the centre or core 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
  • 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

• the invention relates to a method according to the preamble of claim 1.
• the invention also relates to a reel-up according to the preamble of claim 6.
• the problem underlying the invention is that at high reel diameter growth speeds, in particular when using high running speeds and a web of great thickness, the reeling carriage does not have time to come from the change position, i.e. from the discharge position of the finished reel to the changeover of load/drive before the maximum diameter of the primary reeling is reached.
• the problem is encountered in particular in centre drive reel-ups that are provided with a secondary reeling carriage and in which the finished machine reel is slowed down by means of the centre drive in a controlled manner.
• a further problem underlying the invention is that the alternative solution concerning the increasing of the maximum diameter of the primary reeling device is not efficient because in the future, with the further development of technology, for example, with increasing running speeds, it will be necessary to further increase the diameter of the reel formed on the reel spool and the diameter of the reel spool.
• An object of the invention is to provide a solution to eliminate or at least minimize the problems described above.
• the method according to the invention is mainly characterized by what is stated in the characterizing part of claim 1.
• the reel-up according to the invention is in turn mainly characterized by what is stated in the characterizing part of claim 6.
• a separate braking device which can be, for example, an electric motor and/or a mechanical brake, is placed in the braking position of the secondary carriage.
• the braking device is connected to the full finished reel/reel that is being finished, so that the secondary centre drive can be disengaged and there is time for the secondary carriage to be moved in order to fetch the reel before the maximum diameter of the primary reeling device is reached.
• controlled braking of the machine reel finished on the secondary centre drive reel-up is performed both by means of the secondary drive and by means of a separate braking device.
• the arrangement in accordance with the invention makes it possible to perform reeling as a continuous operation and the slowing down of production caused by the interruption of the sequence is eliminated.
• the arrangement in accordance with the invention is inexpensive because larger devices and structures need not be used although the size of the machine reel and speeds increase.
• the invention allows larger machine reels to be wound and speed to be increased.
• the invention also makes it possible to lengthen the braking time, whereby the stresses the reel is subjected to during braking can be minimized.
• the braking position of the braking device is movable, so that it can move in order to receive and to transfer the reel aside for the purpose of braking.
• the braking device which moves substantially in the same direction as the reeling carriage, can move in a position parallel with the reeling carriage, part of the movement length for transferring the reel spool from the reeling carriage to the braking position of the braking device is overlapping.
• the surface of the finished machine reel is pressed with the pressing device, for example, a pressing roll, a brush, a spreader bar or an air pressing device, in a separate position even though the secondary carriage would have already moved in order to fetch a new reel that is being finished if the unwinding of the surface has not been prevented by other means, for example, utilizing an adhesive or water.
• the pressing device for example, a pressing roll, a brush, a spreader bar or an air pressing device
• Figures 1A - ID are schematic views of one prior art arrangement in connection with the changeover process in a reel-up.
• Figures 2A - 2D are schematic views of one application of the invention in connection with the changeover process in a reel-up.
• Figures 3A - 3D are schematic views of another prior art arrangement in connection with the changeover process in a reel-up.
• Figures 4A - 4D are schematic views of another application of the invention in connection with the changeover process in a reel-up.
• Figs. 1A- 2D the same reference numerals are used of the parts corresponding to one another.
• the reference numerals of the prior art arrangement are provided with apostrophes and when the arrangement in accordance with the invention is described, the same reference numerals without apostrophes are used of the corresponding parts.
• the reference arrows shown in the figures to indicate directions are denoted with the letter S and a subscript indicates which part is referred to and further, as also otherwise, the reference signs relating to the prior art are shown with apostrophes and those without an apostrophe relate to an arrangement in accordance with the invention.
• a web W' is wound into a reel 12' being formed on a reel spool 17' of a secondary reeling device.
• the reel spool 17' is connected to a secondary drive 13' and placed in a reeling carriage, i.e. in a secondary carriage 14'.
• a surface holding device, i.e. a pressing device, for example, a pressing roll 19' defines a reeling nip with the reel 12' that is being finished and rotates as shown by the arrow S' 19 .
• the pressing roll 19' also prevents access of air into the reel 12'.
• a new reel spool 15' connected to a primary drive 16' of a reeling
• RECTIFIED SHEET (RULE 91) ISA/EP carriage (not shown) of a primary reeling device has been brought to the vicinity of a reel drum 10' to change reeling to a primary position.
• the reel spool 15' has been accelerated to reeling speed.
• the reel drum 10' rotates in the direction indicated by the arrow S' IO and, correspondingly, the reel spool 15' rotates in the direction indicated by the arrow S' 15 .
• the direction of rotation of the full reel that is being finished is indicated by the reference arrow S' 12 .
• the reel drum 10' is provided with a drive 18'.
• the web has been cut off and the web W to be reeled is guided to run around the new reel spool 15', for example, by means of blows or equivalent (not shown).
• the reel spool 15' has been brought into nip contact with the reel drum 10' to form a reeling nip.
• the web tail W of the full finished reel 12' in a secondary reeling position is held against the surface of the reel using a pressing device, for example, the pressing roll 19'.
• the finished reel 12' is braked in the secondary position, and in the primary reeling position the web W is wound around the reel spool 15' by means of a reeling nip between the reel drum 10' and a web reel 20' that is building up.
• the pressing roll 19' still ensures that the tail of the web remains in contact with the reel.
• Fig. ID shows the problem with today's technique, i.e. that the maximum diameter of the web reel 20' being reeled in the primary position is reached before the reeling carriage 14' manages to fetch the reel 20' and before the reel 20' can be delivered to the reeling carriage.
• the reeling carriage 14', the secondary drive 13' and the pressing roll 19' are just moving in order to fetch the reel 20' from the primary reeling position.
• the finished reel 12' in the secondary reeling position has been stopped and it is transferred for further processing.
• Fig. 2A shows the situation before a changeover when an arrangement in accordance with the invention is applied.
• a web W is wound into a reel 12 around a reel spool 17 in a secondary position.
• a secondary drive is denoted with the reference numeral 13 and a reeling carriage is denoted with the reference numeral 14.
• a pressing device for example, a pressing roll 19 is used for forming a reeling nip and also for preventing access of air into the reel 12 that is being finished.
• a new reel spool 15 has been transferred to the vicinity of a reel drum 10 provided with a drive 18 and a primary drive is denoted with the reference numeral 16.
• a braking device 23 has been arranged in connection with the secondary drive 13.
• the finished machine reel 12 is braked in a separate braking position and braking is accomplished by means of the braking device 23, in which it is possible to use an electric motor, a mechanical brake, a hydraulic motor, a gearbox, a belt transmission or a combination of them.
• the reeling carriage 14 and the secondary drive become free and the reeling carriage 14 starts to move towards the primary reeling position.
• the pressing roll 19 still ensures that the tail of the web W remains in contact with the reel 12.
• the reeling carriage 14 has time to fetch the reel 20 and there is time for the reel to be delivered to the reeling carriage 14 before the RECTIFIED SHEET (RULE 91) SSA/EP maximum diameter of the primary reeling device is reached, after which reeling is carried on by means of the secondary reeling device.
• the finished reel 12 is stopped by means of the braking device 23, after which it is transferred for further processing.
• the pressing roll 19 is moved towards the secondary reeling position and moved into connection with the reel 20, when needed.
• Figs. 3A - 3D show an arrangement known in the prior art in a reeling device in which the changeover is made while the reeling nip is- closed.
• Fig. 3 shows the situation before the changeover.
• the reference numeral 30' designates a reel drum rotating as shown by the arrow S' 3 o, and the drive of the reel drum 30' is denoted with the reference numeral 38'.
• a web is wound around a reel spool 37' and the reel spool 37' is provided with a drive 33'.
• the reel that is being finished is denoted with the reference numeral 32' and a reeling carriage 34' is in connectio -with the reel spool 37', and the direction of rotation of the reel being finished is denoted with the reference arrow S' 32 .
• a pressing device for example, a pressing roll 39' is in its ready position and rotates as shown by the arrow S' 39 .
• Fig. 3B shows the changeover process.
• the web has been cut off and one end of the web W' is held against the surface of a reel 32' being finished by means of a
• 1SA/EP pressing device for example, the pressing roll 39', which rotates as shown by the arrow S' 3 and it has been moved upwards to form a nip with the reel that is being finished, which is indicated by the arrow S' ⁇ .
• a new reel spool 35' rotating as shown by the arrow S' 5 is provided with a primary drive 36' and the other end of the web W' has been transferred into connection with the reel drum 30'.
• the surface holding device, i.e. the pressing roll 39' has been engaged immediately after the changeover.
• the finished reel 32' is transferred on the reeling carriage 34' to a secondary position and it is braked using the secondary drive 33'.
• a reel 40' to be wound around the reel spool 35' by means of the reel drum 30' is transferred to a reeling position, whereat the primary reeling device is turned down onto reeling rails and the diameter of the primary reel increases. The end of the web is still held against the finished reel 32' by means of the pressing device 39'.
• Fig. 3D shows the problem of the arrangement known from the prior art, i.e..the reel 40' reeled on the primary reeling device in the primary position reaches the maximum diameter before the reeling carriage 34' manages to fetch the reel / the reel 40' can be delivered to the reeling carriage 34'.
• the pressing device for example, the pressing roll 39' moves with the- reeling carriage as shown by the arrow S'3,9.
• Figs. 4A - 4D show the changeover process in an arrangement in accordance with the invention, in which the changeover process is carried out while the nip is closed.
• Fig. 4A shows a situation in which a web has been just cut off and the situation corresponds to the stage shown in Fig. 3B in the prior art.
• a braking device 43 used as an aid in the arrangement in accordance with the invention is in a ready position. The reeling of the web into a reel 32 in a secondary position has ended
• the primary drive is denoted with the reference numeral 36 and the drive of the reel drum is denoted with the reference numeral 38.
• Fig. 4B shows a situation in which the secondary reeling device is transferred to a braking position and the braking device 43 has been brought into connection with the secondary reeling device and the reel is braked.
• the pressing device 39 can be used as an aid in distributing the braking moments.
• the primary reeling device In the primary reeling position, the primary reeling device is turned down onto reeling rails or equivalent and the diameter of the reel starts to increase around the reel spool 35.
• the new reel that is building up is denoted with the reference numeral 40.
• the secondary reeling device is disengaged from the finished reel 32 and braking is carried on only by means of the braking device 43. .
• the pressing roll 39 is still used for holding the web against the surface of the reel.
• a reeling carriage 34 and the secondary drive 33 move towards the primary reeling position, in which the reel 40 that is building up is reaching its maximum diameter.
• the braking of ' ⁇ the finished reel 32 is accomplished in this braking- position by means of the braking device 43, for example, an electric motor, a mechanical brake or a combination of them.
• the reeling carriage 34 becomes free to move S 3 towards the primary reeling position already during the braking of the finished reel 32.
• the surface holding device for example, the pressing roll 39 remains in the braking position for the entire time of braking.

Landscapes

• Replacement Of Web Rolls (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8565797

Family Applications (1)

Country Status (2)

Cited By (2)

Citations (7)

• 2003
  • 2003-03-12 FI FI20030369A patent/FI117699B/fi active IP Right Grant
• 2004
  • 2004-03-10 WO PCT/FI2004/000132 patent/WO2004080870A1/en active Application Filing

Patent Citations (7)

Also Published As

Similar Documents

Legal Events