• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method in connection with a slitter-winder (1). According to the method, a web (W) cut into partial webs at the cutting section of a slitter-winder is wound into partial web rolls having a certain diameter, and the machine reel (15) to be unwound is fed at the primary unwinding station (35.1) Drive (36.1), which is connected to the machine reel, unwound down to a certain diameter, the machine reel being transferred from the primary unwinding station (35.1). The machine reel is released from the primary unwinding station and is conveyed away from the primary unwinding station so as to substantially prevent rotation of the machine reel (15) and tension the web between the machine reel and the reel section during transfer, mainly by tension control means (5, 7, 9) is controlled independently of the rotational position of the machine roll.
    公开号:AT511278A1
    申请号:T9483/2009
    申请日:2009-11-09
    公开日:2012-10-15
    发明作者:Petri Enwald；Heikki Foehr；Kenneth Akerlund
    申请人:Metso Paper Inc；
    IPC主号:
    专利说明:

    •
    The present invention relates to a method according to the preamble of claim 1, wherein according to this method a web which is cut into sub-webs at the cutting section of a slitter-winder is wound into sub-rolls of a certain diameter, and the machine reel located in the primary unwinding station is unwound by a drive, which is connected to the machine roll, down to a certain diameter, after which the machine roll is transferred from the primary unwinding station.
    The prior art discloses a machine roll which is unwound on a slitter-winder, and the wide web is cut in the slitting section of the slitter into a plurality of narrower slits which are wound on the winding section around winding cores, such as bobbins, to form consumer rolls. When the consumer rolls prepared simultaneously from each sub-web are completed, the reel-cutting machine is stopped and the reels, or so-called set, are removed from the machine. Thereafter, the process continues while wrapping a new set. These steps are repeated in cycles until the paper runs out of the machine roll, replacing the machine roll and restarting operation as the new machine roll unwinds. The partial web winder may be a carrier roll type winder in which the partial web rolls are supported by carrier rolls through a winding nip between the web roll being formed and a second carrier roll. The partial reel winder may also be a center winder in which the sub web roll is supported at the center (center) and the winding takes place through the nip between the web roll being formed and the reeling cylinder. • · • · «« · · * 0 0 · · 0 · · < * · · · 0 · · · »·· <
    When unwinding a web from the unwinder, a machine roll change is performed when the machine roll becomes empty; in many unwinders of the slitter-winder this is still done entirely manually. A so-called automatic machine roll change is also known, according to this prior art method, stopping the slitter and gripping and cutting the old web with a holding device, for example a suction device, and then removing the empty machine roll and the next unwinding machine roll is replaced. The end of the new machine roll is transferred to the joint station and the ends of the old web and the new web are joined together using various bonding techniques while the slitter and unwind are stopped. A construction of this kind, which is known from the prior art, is disclosed in EP 1 163 178. However, the solution described here is sometimes slow as far as its operation is concerned. In a unwinding solution of another type, the change of the roll is carried out so that the old almost empty roll is lifted away from the unwinding station so that a new roll can be brought to the unwinding station. A disadvantage also in the solutions of this kind, which are known from the prior art, is the decrease in performance, which is caused by the time taken by the roll change.
    The prior art also has solutions for effecting continuous unwinding. US 6 386 477 B1 discloses an unwinding system comprising two unwinding stations provided with their own integrated drives and a movable auxiliary drive. The auxiliary drive allows the web tension to be maintained while the reel being unwound is transferred from the primary unwind station to the secondary unwind station. According to this publication, the unwinding of a full roll at the primary unwinding station is carried out down to a certain roll diameter, after which the roll is transferred to the secondary unwinding station for unwinding and a new full roll is brought to the primary unwinding station. A drawback with this type of construction is that the additional drive provided on the maintenance side presents an impairment in terms of the structure of the platforms, which are required for the maintenance personnel and operating personnel. Furthermore, changing the drive during unwinding requires a very complicated control system and a well-functioning device to ensure that the tension of the material to be unwound does not vary greatly during the drive change.
    An object of the present invention is to provide a slitter-winder and a method of using the slitter-winder, in which the decrease in performance caused by a machine roll change is minimized and in which the reliability of the operation is maximized.
    The object of the present invention is achieved mainly by a method in connection with a slitter winder, according to the method, a web which is cut into partial webs at the cutting section of a slitter winder is wound into partial web rolls having a certain diameter, and according to the method Machine roll to be unwound at the
    Primary unwinding station, by a drive, which is connected to the machine reel, down to a certain diameter is unwound, and then the machine reel is transferred from the primary unwinding station. The invention is characterized in that the tension of the web between the machine roll and the winding section during transfer is controlled mainly by a tension control device independent of the rotational position of the machine roll.
    This provides, inter alia, the advantage that a synchronous movement of the drive or other corresponding structure in synchronism with the machine roll during transfer is avoided, and in this way the number of so-called drive changes during the unwinding process is reduced.
    Preferably, before the machine roll is transferred away from the primary unwind station, the machine reel is released from the primary unwind station and is conveyed away from the primary unwind station to substantially prevent rotation of the machine reel by positive locking.
    In practice, the rotation is prevented by a positive fit, for example, in connection with the support of the machine roll holding elements are provided on the basis of a positive connection, which can be used to prevent the rotation of the machine roll.
    According to one embodiment, the control of the web tension and / or the length during the transfer of a machine roll by means of a tension control system, at least * * * * * ·· partially caused by winding the slitter. In practice, the drives of the winding section are controlled during the transfer of the machine roll so that the change in the length and / or the tension of the web is compensated by the operation of the take-up section. Then, the required device is simple and it is possible to effect the control of the web length and / or the tension very accurately.
    According to another embodiment, the tension of the machine roll during transfer is controlled at least in part by a web accumulator or by several web accumulators.
    In yet another embodiment, the tension of the machine roll during transfer is at least partially controlled by one or more voltage limiting means.
    The transfer of the machine roll is preferably carried out at least partially during a block change, whereby the tension of the web is controlled more easily. The machine reel is transferred from the primary unwinding station to the
    Preferably transferred secondary unwinding station during the sentence change, which precedes the change of the machine roll.
    The machine roll is preferably conveyed from the primary unwinding station in substantially horizontal movement to the secondary unwinding station at which the last stage of unwinding of the machine reel is performed. At the same time that the last stages of unwinding the machine roll are performed, a new machine roll is moved to the primary unwinding station and the end of the web of the new machine roll is brought into proximity to the splicing station while unwinding is in progress. When the unwinding of the web in the secondary unwinding station has been completed, splicing (bonding) of the web to the web of the new machine roll which has been brought close to the splicer during unwinding is carried out. The end of the web of the new machine roll may be brought into proximity with the splicing apparatus substantially in full width of the web. In some applications, the tail may be wedge-shaped with means provided in connection with the unwinding device for forming the wedge in the tail, i. H. preferably an automatic wedge cutting device.
    According to a preferred embodiment of the present invention, in controlling the tension and / or the length of the web running to the cutting portion, one or more of the following tension control means is independent of the tension control structure independent of the rotational position of the roll Rotational position of the roller applied: A control of the winding device, which changes the rotational position of the consumer rollers; a railway battery; a voltage limiting device.
    Many advantages are achieved by the present invention. The method significantly improves the overall efficiency of the slitter rewinder, since a minimum amount of time is required for splicing the webs during a machine roll change.
    According to an embodiment of the present invention, the splicing is carried out simultaneously with the time when the webs coming from the
    Secondary unwinding station and the primary unwinding station come to be connected, the unwinding is carried out at a speed which differs from the zero speed. Then, the splicing in the web running direction is inclined (oblique), which is a compound acceptable for further processing, i. H. a so-called commercial splice.
    The invention and its operations are described below with reference to the accompanying schematic drawings.
    Fig. 1 shows schematically a web roll cutting machine according to an embodiment of the present invention.
    Fig. 2 schematically shows a web roll cutting machine according to another preferred embodiment of the present invention.
    Fig. 3 shows schematically a web roll cutting machine according to yet another preferred embodiment of the present invention.
    Fig. 4 shows schematically a web roll cutting machine according to yet another preferred embodiment of the present invention.
    Fig. 1 shows schematically a web roll cutting machine 1 according to an embodiment of the present invention.
    It has a winding device 5 for partial webs, a cutting section 10 and an unwinding 20 for machine rolls 15 in side view. The unwinding device 20 has a body 25 provided with adjacent and parallel rails 30 for transferring the machine rollers 15 at both ends of the unwinding shafts
    To support bearings in the same way (only one is shown here). Preferably, the rails are substantially horizontal. The unwinding device has a primary unwinding station 35.1 and a secondary unwinding station 35.2, both being provided with a stationary drive 36.1, 36.2 in the exemplary embodiment of the drawing. Both drives have a motor and a coupling element, through which the motor can be coupled to the unwinding shaft of the machine roll. By the term stationary drive is meant that the drive can only be coupled to the unwinding shaft when it is in the unwinding station.
    The winder 5 in this embodiment is a carrier roll type / belt type winder, but it is obvious that the winder can be of any type suitable for winding partial webs. Furthermore, the winding device has at least one drive 5.1, 5.2, by means of which the winding force can be directed to the rollers to be formed, and thus the partial webs can be converted into partial web roles.
    The unwinding device 20 has a first support and control device 40.1 and a second support and control device 40.2. The support and control device 40.1 and the support and control device 40.2 adjust the movement of the machine roll on rails 30 such that the movement and the position of the machine roll is determined by the control device 40.1, 40.2. The support and control device 40.1 is equipped with a first rail 45.1, which is supported on the body 25, wherein the control device 40.1 is arranged to be moved along the rail by means of an actuator 210. Similarly, the second support and
    Control device 40.2 equipped with another (not shown) rail, which is supported on the body 25, wherein the control device 40.2 is arranged so that it is moved in a corresponding manner along the rail. The first support and control device 40.1 and the second support and control device 40.2 and also the first rail and the second rail are provided on different sides of the body 25, whereby the first support and control device 40.1 and the second support and control device 40.2 to are able to handle each other. The range of movement of the two support and control devices extends from the primary unwind station 35.1 to the secondary unwind station 35.2.
    The web W is fed from the machine reel to the winding section 5 via the cutting section 10 by being guided by the guide rollers 70 assigned to the web. The guide rollers are preferably stationary with respect to the position. A web splicing device 60 is provided in the web transfer section between the web unwinding device 20 and the cutting section 10, by means of which the webs arranged side by side can be attached to each other and additional sections such as the web ends can be cut out. The web splicing device 60 may comprise one element or two elements, wherein the first element of the splicing device is disposed on the first side of the raceway of the web W and the second element is disposed on the other side. During normal operation of the slitter, the elements of the web splicer are spaced apart, but they are brought together for the splicing operation, leaving the webs to be joined between the elements of the splicer. The type and operation of the splicer preferably allows for joining of the webs arriving from the secondary unwinding station and the primary unwinding station while the webs are in motion whereby the splice is inclined (skewed) in the web running direction.
    According to an embodiment of the present invention, the web W is unwound in its entirety on a slitter-winder, cut into sub-webs on the cutting section 10, and sub-web rolls are wound on the winder 5. The unwinding is started at the primary unwinding station 35.1, and the machine reel 15 to be unwound is unwound down to a certain diameter at the primary unwinding station 35.1, after the machine reel 15 is guided to the secondary unwinding station 35.2 by a support and control device and an actuator 210 has been transferred. The remainder of the unwinding of the machine roll is carried out in the secondary unwinding station 35.2.
    At the same time as the end portion of the machine roll is being unwound, a new machine roll 15 is brought to the primary unwinding station 35.1, and the end of the new machine roll web W is brought close to the splicer while the unwinding is in progress. Then, a machine roll change causes an interruption in production that is as short as possible or no interruption at all depending on the splicing method.
    A control assembly 200 is provided in connection with the unwinding device to guide the operation of the slitter-winder according to one embodiment of the present invention; the construction here being described in particular in connection with the transfer of the machine roll 15 from the primary unwinding station 35, to the secondary unwinding station 35.2, as far as the actuator 210 of the support and control device and the drives 5.1, 5.2 of the winding device 5 are concerned. The control structure has a data transmission connection with the drives 5.1 and 5.2 and the actuator 210 of the support and control device.
    The machine roll has a certain rotational position a both at the primary unwinding station and at the secondary unwinding station. When unwinding, the rotational position changes constantly, whereby the web is unwound from the machine reel at a certain speed. The speed is also affected by the diameter of the machine roll at this time. The rotational position in unwinding is determined by the drive coupled to the machine roll 15.
    In Fig. 1, a relatively large machine roll in the primary unwinding station 35.1 is shown by a solid line. If the size of the role has become adequately low, in other words, if the
    Wheelset machine has run sufficiently long, the machine roll 15 is transferred by means of an actuator 210 and a support and control device to the secondary unwinding station 35.2. Before transfer, the drive 36.1 of the primary unwinding station coupled to the machine reel is released from the machine reel. According to the present invention, the tension of the web W passing from the machine roll 15 to the cutting section 10 is controlled mainly by a tension control structure which is independent of the rotational position of the machine roll 15.
    This means that the rotation of the machine roll is not actively affected during the transfer. By doing
    Embodiment of Fig. 1, the
    Voltage control assembly, which is independent of the rotational position of the machine roll, a combination of the control system of the actuator 210 and at least one drive 5.1 of the winding device 5 on. Thus, during transfer of the machine roll 15, it is transferred away from the primary unwinding station 35.1 substantially unrestrained, and the tension of the web W of the machine roll 15 is controlled mainly by means of winding 5 of the slitter-winder. The drive of the winding section is controlled so that during the movement of the machine reel 15 away from the primary unwinding station 35.1 the changing length of the path of the web is compensated for by winding the consumer rolls 12 by means of at least one drive of the winding section 15. In this way, a change in the rotational position of the load roller is generated by means of the drive. Thus, no separate movable drive or braking device following the machine roll is required for the transfer of the machine roll 15.
    According to one embodiment, the rotation of the machine roll 15 is preferably prevented during transfer by positive locking. During the transfer of the machine roll, the rotation of the machine roll 15 on the basis of the positive locking is prevented by means of a locking device 36.3 in connection with the machine roll or its support and control device.
    A control structure 200 is provided to control the operation of the actuator 210 and the drives 5.1, 5.2 during transmission as follows. At the same time that the machine roll 15, shown in dashed lines in Fig. 1 in a transfer situation, is transferred to the second unwind station 35.2, the path of the web W passing from the roll to the reel station 5 is changed , Then, the drive 5.1, 5.2 of the winding device is applied so that the excessive shortening of the distance is compensated for by changing the length of the web from the machine roll 15 to the winding device 5. This is realized in an advantageous manner by winding a corresponding amount of the web on partial web rolls 12. At the same time, the operation of the cutting section 10 is continued. In this way, the length of the web W running from the machine roll 15 to the cutting section 10 during the transfer of the machine roll 15 from the primary unwinding station 35.1 to the secondary unwinding station 35.2 is at least partially controlled by the application of the winder 5 of the slitter-winder.
    In addition to controlling the length of the web, some embodiments allow the operation to be performed at an improved level by maintaining a given web tension during transfer of the machine roll. The accuracy of the web tension control can be improved by providing the structure with a web tension measurement 72, which is arranged in connection with the guide roller. Now, the real value of the web tension can be used in the control of the drives of the winding device 5.
    In the embodiment shown in Fig. 1, the transfer of the machine roll due to the machine geometry and the web unwinding direction has a phase in which the path of the web from the machine roll to the winding device 5 first decreases and it begins to increase as the transfer progresses. This exact phase is shown, with the machine roll 15 being depicted by a dashed line. At this time, the web unwound from the machine roll hits the guide roller 70 at the left side in the drawing, thereby bending the path of the web as the transfer proceeds, and thus the path of the web from the machine roll 15 to the winding device is designed longer.
    According to an embodiment of the present invention, the direction of rotation of the winding device is changed in this situation, and the length of the web increases by unwinding the web from the partial web rolls. It should be appreciated that the need to change the web length caused by the change in raceway length typically requires unwinding less than one turn around of the web from the finished consumer rolls to compensate for the change in raceway length of the web.
    According to another embodiment, in the transfer of the machine roll to the above-described stage, in which the path of the web from the machine roll to the winding device 15 initially becomes shorter and then begins to increase, the web length is adjusted by using the winding section 5 such that before that stage, the length of the web is shortened by the amount substantially corresponding to the difference between the shortening of the web before that step and the increase in the length following that step.
    If the machine geometry and / or the web unwinding direction are such that the distance from the machine roll 15 becomes shorter all the time as the machine roll transfers to the secondary unwind station 35.2 • * II * * fc * * 15. «
    Preferably, the compensation of the change comprises only a shortening of the track length. In Fig. 1, the position of the machine roll at the secondary unwinding station 35.2 is shown with dashed dotted lines. At this time, the distance between the stations indicated by a broken line and a dot-and-dash line rapidly increases during transfer of the machine roll to the secondary unwinding station 35.2.
    Fig. 2 schematically shows a web roll cutting machine 1 according to another embodiment of the present invention. This likewise has a winding device 5 for partial webs, a cutting section 10 and an unwinding device 20 for machine rolls 15 in a side view. As regards their construction and operation, these components correspond to the components of the slitter-winder shown in FIG. The drives of the primary unwinding station 35.1 and the secondary unwinding station 35.2 are provided with a motor and a clutch with which the motor can be coupled to the rotary shaft of the machine reel.
    The web is guided from the machine roll via the cutting section 10 to the winding section 5 by the web guide rollers 70. The guide rollers are preferably stationary with respect to the position (fixed). As in the embodiment of FIG. 1, also in this embodiment, a web splicing device 60 is provided in the web transfer section between the web unwinding device 20 and the cutting section 10.
    The full-width web W is unwound on a slitter-winder according to the embodiment of FIG. 2 and in partial webs on the cutting section 10 ····················
    ·
    cut, and partial web rolls are wound on the winding device 5. The unwinding is carried out in the same manner as in the unwinding apparatus of the embodiment of FIG. The cutting device is provided with a Bahnakkumulator 7. The Bahnakkumulator has web guide rollers, by means of which the track of the web from the unwinding to the winding can be extended or shortened. In Fig. 2, the accumulator has two rollers which have been connected to the ends of levers which are rotatably supported at the center. By turning the levers present here at both ends of the rollers, the rollers are caused to move so that the wrapping of the web on the rollers can be changed. Fig. 2 shows a dashed line another position of the Bahnakkumulators. By rotating the levers, a certain amount of the web can be stored in the web accumulator or released from the web accumulator 7. The web accumulator may be implemented in a variety of different manners and the structure may include a plurality of separate web batteries. Another alternative is, for example, in parallel rows of rollers, over which the track is arranged to run in turns and the distance between them is adjustable.
    A control assembly 200 is provided in connection with the unwinding device, being arranged to control the operation of the slitter-winder according to an embodiment of the present invention, particularly for the part of the actuators 210 of the support and control device and the Bahnakkumulators in connection with the transfer of the machine reel 15 from the primary unwinding section 35.1 to the Sekundärabwickelabschnitt 35.2 is particularly described. Of the
    Control structure is set up so that it has a data transmission and a control connection with the Bahnakkumulator 7 and also with drives 5.1 and 5.2 and with the actuator 210 of the support and control device.
    In Fig. 2, a relatively large machine roll in the primary unwinding station 35.1 is shown by a solid line. If the size of the roll is reasonably small, the machine roll 15 is transferred to the secondary unwinding station 35.2 by means of the actuator 210 and the support and control device. Before transfer, the drive 36.1 of the primary unwinding station, which is coupled to the machine reel, is released from the machine reel. According to the present invention, the tension of the web W passing from the machine roll 15 to the cutting section 10 is controlled at least in part by the tension control structure independent of the rotational position of the machine roll 15. In the embodiment of Fig. 2, the
    Voltage control structure, which is independent of the rotational position of the machine roll, a combination of the control system of the actuator 210 and at least the Bahnakkumulator 7 on.
    In addition, the control of at least one drive of the winding device 5 shown in Fig. 1 may be applied as needed. Then, during transfer, the machine roll 15 is transferred away from the primary unwind station 35.1, substantially non-driven, and the tension of the web W of the machine roll 15 is controlled primarily by the web accumulator 7. *** " As the tension of the web decreases, the length of the web in the web accumulator increases, and thus more web W is accommodated in the web accumulator 7, and as the web tension increases, the length of the web in the web accumulator decreases. In this way, the changing length of the web during the machine roll change is compensated by the levers of the
    Bahnakkumulators be rotated. Thus, no separate movable drive following the machine roll is required for the transfer of the machine roll 15, and the compensation of the change in web length and / or tension can be carefully made in a simple and reliable manner.
    The accuracy of the web tension control can be improved by providing the structure with a web tension measurement 72, which is arranged in connection with the guide roller. Now, the control of the drives of the winding device 5 can use the real value of the web tension. When setting the voltage, the influences of the sentence ending are preferably also
    Sentence change, and the requirements of the adhesion of the web layers, which may be used in the production of consumer rolls.
    Also in the embodiment shown in Fig. 2, the transfer of the machine roll due to the machine geometry and the web unwinding direction has a phase in which the path of the web from the machine roll to the take-off device 5 first decreases and then begins to increase as the transfer proceeds. Then, the web unwound from the machine roll hits the guide roller 70 at the left side in the drawing, thereby bending the track of the web as the transfer proceeds, and thus the length of the web from the machine roll 15 to the winding device increases. In this situation, the web accumulator according to the present invention is guided so that the length of the raceway of the web, which is caused by the Bahnakkumulator 7, decreases.
    Fig. 3 shows schematically a web roll cutting machine 1 according to yet another embodiment of the present invention. This, too, has a winding device 5 for partial webs, a cutting section 10 and an unwinding device 20 for machine rolls 15 in a side view. The construction and operation of these components correspond to the components of the embodiment of the slitter-winder shown in FIG. The drives of the primary unwinding station 35.1 and the secondary unwinding station 35.2 are provided with a motor and a clutch, via which the motor can be coupled to the winding shaft of the machine reel.
    The web W is guided from the machine roll via the cutting section 10 to the winding section 5, being guided by the guide rollers 70 of the web. In the manner of Fig. 1, also in this embodiment, a web splicing device 60 is provided in the web transfer section between the web unwinding device 20 and the cutting section 10.
    In the embodiment of FIG. 3, the full-width web W is unwound and cut into partial webs on the cutting section 10, and partial web rolls are wound on the winding device 5. The unwinding is carried out in the same manner as in the unwinding apparatus of the embodiment of FIG. The slitter is equipped with a
    Voltage limiting device 9 is provided, which is arranged in front of the cutting gate 10 in the web running direction. The voltage limiting device 9 has a protective device on the web guide roller, by means of which the web can be pressed against the roller and held between the roller and the voltage limiting device 9 can be •. It is essential that the web can not slide on the tension limiting device. The voltage limiting device may be steered to contact the web, thereby activating it, and may be steered to pass away from the roll, thereby deactivating it.
    A control assembly 200 is provided in connection with the unwinding device so that the operation of the slitter is described here in particular in connection with the transfer of the machine roll 15 from the primary unwinding 35.1 to the secondary unwinding station 35.2, as far as the actuator 210 of the Stüt2- and Control device and the voltage limiting device 9 are affected. The control structure has a data transmission and a control connection with the voltage limiting device 9 and the drives 5.1 and 5.2 and the actuator 210 of the support and control device.
    In Fig. 3, a relatively large machine roll in the primary unwinding station 35.1 is shown by a solid line. If the size of the roll is reasonably small, in other words, if the slitter has run sufficiently long, the machine roll 15 is transferred by means of an actuator 210 and a support and control device to the secondary unwinding station 35.2. Before transfer, the drive 36.1 of the primary unwinding station, which is coupled to the machine reel, is released from the machine reel. According to the present invention, the tension of the web W running from the machine roll 15 to the cutting portion 10, particularly at the cutting portion, is controlled at least in part by a tension control structure independent of the rotational position of the machine roll 15. In the embodiment of Fig. 3, the
    Voltage control structure, which is independent of the rotational position of the machine roll, a combination of the control system of the actuator 210 and the voltage limiting device 9 on. In addition, the solutions described in Figures 1 and 2 can be applied as needed. As a result, during the transfer of the machine roll 15 away from the primary unwinding station 35.1, it is essentially not driven. Before the start of the transfer, the voltage limiting device is activated, whereby the wire section following the voltage limiting device in the web running direction, its voltage is maintained. In this way, a considerable decrease of the material tension, in particular at the cutting section, and thus possible disturbances, which are caused by the decrease of the tension, can be avoided. The machine roll 15 is transferred from the primary unwinding station to the secondary unwind station 35.2, and the secondary drive 36.2 is coupled to the machine reel. The machine roll can now be rotated by means of the secondary drive so that the possible sagging of the web is compensated during transmission before the voltage limiting device 9 is deactivated. Then a separate movable drive following the machine roll is not required for the transfer of the machine roll 15.
    The machine roll change is preferably carried out at least in part during the set change, with the web being cut during the machine roll change end ending either at the bottom or at the surface of a consumer roll. Thus, the possible disturbances can not cause quality problems inside the consumer role. Preferably, the machine roll transfer is performed during the block change preceding the last one. Then, the old machine roll 15, which has become empty in the last sentence change, already at the secondary winding station 35.2, and the roll change can be carried out particularly quickly.
    Fig. 4 shows the preparation of the splicing which takes place after the transfer of the machine roll. The structure of the slitter-winder of Fig. 1 corresponds to the structure of the slitter-winder in Fig. 1. In connection with the unwinding device 20, a web transfer device 100 is provided to be moved between the primary-transfer station 35.1 and the vicinity of the web-wearing device 60 so that its runway 105 passes the guide rollers 170 according to the running of the web W during normal running. The web transfer device 100 preferably has a gripping zone which is as wide as the entire web W. In the embodiment of FIG. 4, the web transfer device 100 is a roller or a corresponding member having a perforated outer surface, and is connected to a vacuum source 130, and thus a suction effect can be induced in the perforations of the outer surface of the web transfer device 100. The web transfer device 100 is preferably a suction roll rotatably mounted on bearings 110 in the switch device 120, by means of which it can be moved along the path 105. The perforation of the outer surface may extend over the entire surface of the roll or over a particular sector thereof.
    According to another embodiment of the present invention, the full-width web W is unwound and cut into sub-webs at the cutting section, and sub-web rolls are wound on the winding device. The unwinding is started at the primary unwinding station 35.1, and the machine reel 15 is unwound down to a certain diameter after the machine reel has been transferred to the secondary unwinding station 25.2 at which the remaining unwinding of the machine reel is performed. If the web length / web tension is controlled during transfer, the preparation for splicing can be carried out very quickly.
    At the same time as at the time when the final stage of unwinding the machine roll at the
    Secondary unwinding 35.2 is performed, a new machine roll 15 is brought to the primary unwinding station 35.1, and the end of the web W of the new machine roll 15 is brought into the vicinity of the splicer 60, as the unwinding proceeds.
    Fig. 4 shows a situation where the
    Web transfer device with the transfer of the web W of the new machine roll 15 in the vicinity of the splicing device 60 begins. In the drawing is the
    Web transfer device in contact with the machine roll, and the web end is wound around the web transfer device around. When the suction effect of the web transfer device 100 has been turned on, the end of the web adheres to the web transfer device 100. The structure may also include one or more air blowing elements suitably directed to assist this process. The blowing stream may be used to strip the web from the surface of the machine roll or to assist in releasing the web and / or winding the web onto the web transfer device. When the web transfer device 100 rotates, preferably in a direction in which its surface moves in the unwinding direction of the web, the web W is unwound from the machine roll around the web transfer device 100. FIG.
    4 shows, with a dashed line, the position of the web transfer device at which a new web is ready for splicing.
    According to one embodiment, the end of the new web is wound to the web transfer device as a strip or wedge narrower than the web width, and the end of the web is placed in full width near the splicer. For this purpose, the unwinding device is preferably provided with a
    Wedge cutting device equipped. Subsequently, the wedge is widened, simultaneously widening the widened web wedge around the web transfer device and unwinding the web from the primary winder until the new web has reached its full width at the splicer. This is done while unwinding the old web at the secondary unwind station is in progress.
    According to another embodiment, the end of the new web can be wound in full width on the web transfer device and the end of the web can be conveyed in a strip near the splicer. Again, this is done as unwinding of the old web at the secondary unwind station progresses.
    When the splicing is completed, the web transfer device 100 remains under the web. Then, the web which has been wound to the web transfer device 100 in connection with the web-end conveyer can be discharged out without any substantial risk that the web will be discharged to end up as a disturbance factor so as to interfere with that web Contact gets settled. Thus, the
    Web transfer device preferably emptied while the slitter-winder is running.
    Although the above-exemplified embodiments shown in the drawings describe a so-called top-run application, the present invention is also applicable to the so-called down-running applications.
    Furthermore, it should be understood that only a few of the most preferred embodiments of the present invention are listed above. Thus, it is obvious that the present invention is not limited to the embodiments disclosed above, but may be modified in many ways within the scope defined by the appended claims. Furthermore, the features set forth in connection with the various embodiments may be used in conjunction with other embodiments within the inventive concept of the present invention, and / or various elements / devices may be combined from the features set forth, if desired and the technical possibilities exist.
    权利要求:
    Claims (11)
    [1]
    Claims 1. A method in connection with a slitter-winder (1), according to the method, a web (W) cut into partial webs at the cutting section of a slitter-winder is wound into partial web rolls of a certain diameter, and according to the method Machine roll (15) to be unwound at the primary unwinding station (35.1) by a drive (36.1) connected to the machine reel down to a certain diameter, the machine reel being transferred from the primary unwinding station (35.1) characterized in that the tension of the web between the machine roll and the winding section during transfer is controlled mainly by a tension control means (5, 7, 9) independent of the rotational position of the machine roll.
    [2]
    A method according to claim 1, characterized in that the machine roll is released from the primary unwinding station and conveyed away from the primary unwinding station such that the rotation of the machine reel (15) is substantially prevented by a positive fit (36.3).
    [3]
    3. The method according to claim 1, characterized in that during the transfer of the machine roll (15), the tension of the web is at least partially controlled by means of the winding (5) of the slitter-winder.
    [4]
    4. The method according to claim 1 or 3, characterized in that during the transfer of the machine roll, the voltage of the web is at least partially controlled by means of one or more Bahnakkumulator (s) (7). ♦ · * * Φ 9 · · 9 • * * * *
    [5]
    5. The method according to claim 1, 3 or 4, characterized in that during the transfer of the machine roll (15), the tension of the web of the machine roll is controlled at least partially by means of one or more voltage limiting device (s) (9).
    [6]
    6. The method according to any one of the preceding claims, characterized in that the transmission of the machine roll (15) is at least partially carried out during a sentence change.
    [7]
    A method according to claim 1, characterized in that according to the method, the machine roll is moved in a substantially horizontal movement away from the primary unwinding station to the secondary unwinding station (35.2) at which the final stage of unwinding the machine reel is performed.
    [8]
    A method according to claim 7, characterized in that, simultaneously with the time at which the last stage of unwinding the machine roll is carried out, a new machine roll (15) is moved to the primary unwinding station (35.1) and the tail of the new machine roll is brought near the splicer (60) while unwinding is in progress.
    [9]
    A method according to claim 8, characterized in that the end of the web of the new machine roll is brought into substantially full width proximity to the splicer (60) while the unwinding is in progress.
    [10]
    A method according to claim 7, characterized in that, when the unwinding of the web of the machine roll is completed, the splicing of the web with the web of the new machine roll which has been brought into the vicinity of the splicer / during unwinding is in progress becomes.
    [11]
    11. The method according to claim 7, characterized in that the machine reel (15) is transferred from the primary unwinding station to the secondary unwinding station (35.2) substantially during the block change preceding the change of the machine reel.
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    同族专利:
    公开号 | 公开日
    DE112009002639T5|2012-05-16|
    FI20086060A|2010-05-11|
    WO2010052374A1|2010-05-14|
    AT511278B1|2013-01-15|
    FI20086060A0|2008-11-10|
    FI121956B|2011-06-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4697755A|1984-08-27|1987-10-06|Hiroshi Kataoka|Rewinder with slitter|
    DE102005028334A1|2005-06-18|2006-12-28|Koenig & Bauer Ag|Device for regulation of web tension of web of material has compensation system having primary and secondary compensators, which are adjustable in their positions between zero position and final position|
    EP1798172A2|2005-12-16|2007-06-20|Voith Patent GmbH|Device and method for unwinding a material web|
    US3955737A|1974-04-08|1976-05-11|Moore Business Forms, Inc.|Web feed apparatus|
    US4775086A|1985-08-27|1988-10-04|Hiroshi Kataoka|Take-out/take-up tension control apparatus|
    NL8702407A|1987-10-09|1989-05-01|Stork Contiweb|Apparatus for continuously feeding a stock web from a stock roll.|
    JP2730854B2|1993-10-21|1998-03-25|住友ゴム工業株式会社|Winding method and winding device for narrow sheet member for tire|
    DE19716887A1|1997-04-22|1998-10-29|Voith Sulzer Papiermasch Gmbh|Winding machine|
    DE19722209A1|1997-05-27|1998-12-03|Voith Sulzer Papiermasch Gmbh|Unwind station for the continuous unwinding of a material web|
    AT252044T|1999-03-24|2003-11-15|Voith Paper Patent Gmbh|DEVICE FOR JOINING MATERIAL RAILS|CN102040115B|2010-11-30|2016-09-28|西安新达机械有限公司|A kind of method for designing of the automatic moving feeding rack of base material longitudinal splitting apparatus|
    DE102017124237B4|2017-10-18|2020-10-15|Voith Patent Gmbh|Unwind station|
    DE102019111592A1|2019-05-06|2020-11-12|Voith Patent Gmbh|Material web processing|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI20086060A|FI121956B|2008-11-10|2008-11-10|Procedure in conjunction with a fiber web roller cutter|
    PCT/FI2009/050901|WO2010052374A1|2008-11-10|2009-11-09|A method in connection with a slitter winder for a fiber web|
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