AT13786U1 - liquidator - Google Patents

Abstract

A continuous web unwinder (10) for a web machine comprising a primary position (10.1.), A secondary position (10.2) and a joining device (1) comprising a joining roller (12), and apparatus for moving an emptying machine reel and a new machine reel substantially into horizontal direction, wherein the joining device (1) comprises a movable body (4) and the joining roller (12) is attached to the body at the ends thereof, a smaller one to be realized with the body (4) and a body movement (4 ', 17') Joining movement (17 ') of the joining roller (12) for closing and opening a joining roll gap (17) and a larger approach and removal movement (4') of the joining roll (12) with respect to a machine roll (11) to be joined.

Description

Austrian Patent Office AT 13 786 Ul 2014-08-15

description

liquidator

FIELD OF THE INVENTION

The invention relates to a continuous unwinder for treating web-like material in fiber web machines, preferably in paper and board machines. In particular, but not exclusively, the invention relates to assembling a web with a continuous unwinder.

BACKGROUND OF THE INVENTION

The purpose of the winding is the conversion of a fiber web produced in a fiber web machine in a better-treated form. The continuous process of the paper machine is interrupted for the first time with a scheduler, whereupon the transition to a periodic activity occurs. This periodic phase should run with the best possible degree of utilization, so that the work already done is not in vain. After the rewinder for the fiber web machine, the paper can be wound several times before final product completion.

The paper is unwound, for example, when using an off-machine coater or a calender for further treatment of the paper with the machine in question. In a continuous unwinder, a new machine roll to be brought to the unwinder is added at full operating speed to the end of the idling machine roll.

When joining to the end of the new machine roll, the seam is prepared, for example, with a double-sided adhesive tape attached to the surface of the machine roll. The surface speed of the new machine reel is accelerated to a speed as equal as the operating speed of the machine, after which the web of the emptying machine reel is pressed, for example, with a roller at the seam. The old web is severed with a knife on the tail side of the formed seam. A joining device is composed of a joining roller and a guide roller arranged after this and of actuators which move the rollers mentioned above.

As limitations in the context of unwinders with today's operating speeds of more than 2,000 m / min and in particular when winding thick grades, the circumstances described below may occur. When merging, a sequence constraint may arise, which, when using two winding positions in the unwinder, a primary position and a secondary position, can not accelerate and pace the machine roll located in the primary position to the joining speed before the bottom of the empty position becomes empty Roll is wound up to the end. Thus, the sequence restriction limits the capacity of a paper making device following the winding position, such as the coater, because the speed is to be limited. The sequence constraint also results in an increase in the diameter of web rolls to be moved from the primary position to the secondary position and thus an increase in designs for the unwinder, such as lift arms, thereby increasing space requirements and manufacturing costs. Moving and lifting a large mass is a safety hazard. Control over the movement of lift arms can be complicated.

The releasing end at the bottom of the assembled roll and / or the end of the paper snippets can get into a Füaltalzpalt, which can easily lead to a break in the assembly or at least a compressed air consuming blow-off is required to prevent Paper shredded into the nip 1/9 Austrian Patent Office AT13 786U1 2014-08-15 gen.

A change in the web length in a Zusammenfügesituation caused when moving the joining roller against the machine roll, a change in the web tension. The track length generally increases, causing an increase in web tension and a change in web tension away from an optimum tension and unwinding value.

A sudden increase in web tension increases the risk of web breakage.

In the patent publication Fl 100323 B, a joining device for a continuous unwinding machine is shown, which comprises a movable by means of a lever device with compressed air joining roller and a guide roller over which the web runs during the Zusammen-joining. The hinge point of the lever device is positioned between the joining roll and the guide roll, whereby the run length of the web before joining and the run length of the web during joining are substantially equal.

In the patent publication Fl 119634 B, a continuously operating unwinder is shown which comprises a primary position and a secondary position and a joining device having a joining roller and a guide roller. The emptying machine roll and the new machine roll are moved in the horizontal direction with pairs of cars, both of which have a brake generator.

In the publication JP 2002-087661 A, a continuously operating unwinding device is shown, in which the unwinding machine roll is moved during unwinding on horizontally extending rails. In the unwinding device, the web is assembled with a joining device which comprises two guide rollers which are rotatably mounted on pivoting arms and a joining roller between the guide rollers. The approaching movement of the joining device for forming a joining gap is realized by rotating the pivoting arms around the joints arranged on the outside of the rollers for the joining device. The working movement of the joining device for closing the joint gap is realized with cylinder lever mechanisms, which are arranged between the pivot arms and the joining roller.

An object of the invention is to obtain an improved continuously operating unwinder.

SUMMARY

According to the invention, there is provided a continuous winder for a fiber web machine comprising a primary position and a secondary position and a joining device comprising a joining roll, the unwinder comprising means for moving a draining machine roll and a new machine roll into a substantially horizontal direction, wherein the joining device comprises a movable body, and the joining roller is attached to the ends of the body, and wherein a with the body and a body movement bewerkstelligenden actuator to be realized smaller joining movement of the joining roller for closing and opening a Fügewalzenspalts and a larger Proximity and removal movement are provided with respect to a machine reel to be joined.

Preferably, the joining device further comprises a second guide roller, which is attached to the body in the direction of the unwinding web after the joining roller in such a way that the joining roller and the second guide roller move simultaneously with the movement of the body.

Preferably, the joining device comprises an actuator pair, which is arranged to act on the arranged on the operating and drive side body for the unwinder, on which the rollers are mounted for the joining device.

The preferred embodiments of the invention are described in more detail in the following description and in the appended claims.

The various embodiments of the present invention will be described only in connection with one or some aspects of the invention. It will be understood by those skilled in the art that any embodiment of any aspect of the invention may be practiced in accordance with the same aspect of the invention, and in other aspects, alone or in combination with other embodiments.

BRIEF DESCRIPTION OF THE FIGURES

[0018] The invention will be further described by way of example with reference to the accompanying drawings, in which a handler according to some embodiments of the invention is described from the side, illustrating a joining device suitable for use in conjunction with an unwinder of Figures 1 and 3 to 5 is suitable.

FIGS. 1 and 3 to 5 [0020] FIG. 2

DETAILED EXPLANATION

In the following description similar parts are designated by the same reference designations. It should be understood that the illustrated figures are not drawn to scale in their entirety and that they are primarily for the purpose of illustrating embodiments of the invention only.

In the figures, an emptying machine roll for a developer 10 by the reference numeral 11, a joining device with the reference numeral 1 and a joining roller with the reference numeral 12 are indicated. A new machine roll is denoted by the reference numeral 13 and the direction of rotation with an arrow 13 '. A joining adhesive tape fastened to a new web W is identified by the reference numeral 14 and a separating device by the reference numeral 15. The emptying machine reel and the new machine reel are moved in the horizontal direction from a primary position 10.1 to a secondary position 10.2, for example with carriages movable on rails 16. For the primary and secondary positions drives for rotating the machine roll 13, 11 are arranged in a manner known per se. In the secondary position, the machine roll 11 can be braked, for example, by a brake generator belonging to the drive. A preferred position for the separating device 15 is shown between the guide roller 2 and the joining roller 12.

The joining device 1 comprises a first guide roller 2 arranged in front of the joining roller 12 and one after the joining roller 12, i. at the bottom of the joining roller, arranged second guide roller. 3

The joining device 1 comprises a movable body 4, to which the joining roller 12 is attached at the ends thereof. With the body 4 and a body movement 4 'to bewerkstelligenden actuator is to be realized smaller joining movement 17' of the joining roller 12 for closing and opening a Fügewalzenspalts 17 and a larger approach and removal movement 4 'of the joining roller 12 with respect to the machine reel 11 , By means of the larger movement 4 ', the joining device 1 can be moved in such a way that, for example, the machine roll moving in the horizontal direction from the primary position 10.1 to the secondary position 10.2, the joining device 1 can pass.

Preferably, the joining device 1 comprises the unwinder 10 as well as on the Bedienungsais also on the drive side, the body 4, on which or with respect to which the rollers for the joining device 1 are attached. On the body 4 is preferably an actuator pair (not shown in the figures), with which the working movement or the joining movement 17 'of the joining device 1 (and thus the joining roller 12) can be realized with the same Stellan- 3/9 Austrian Patent Office AT13 786U1 2014-08-15 the pairing device may be closer or more distant with respect to, for example, the primary position 10.2, the machine roll 13 at the primary position, the open seaming nip 17, the ready position for assembly with the joining device (of FIG where the joining movement 17 'begins), the basic position and the machine roller passing the joining device 1 are moved.

In Fig. 1, the new machine roll 13 has been accelerated to the operating speed and the coming of the emptying machine roll 11 old web W1 was brought with the approximation movement 4 'of the body close to the surface of the new machine roll 13, after which the Fügewalzenspalt 17th was closed by pressing the old web W1 with a small movement 17 'of the joining roller 12 against the surface of the machine reel 13. The old web is severed from the top of the seam 14 with a breaker 15, in other words, from the end face of the formed seam 14. In connection with the joining, the severing of the web may be carried out by a known technique, for example, one above entire width of running knife. When the web W located on the new machine roll 13 (4.5 m diameter, for example) has been added to the end of the old web W1, the machine reel in the primary position 10.1 can be unwound to the area indicated by a broken line 13.1 (for example 2.6 m) and the process is started in the horizontal direction in such a way that the risk of collision with the empty old winding core does not exist. In this case, the diameter 13.1 of the machine reel during the process in the horizontal direction is reduced even more to a diameter 11.1 (for example 2.5 m) marked with a dot-dash line in FIG. 3, with which the joining device 1 can be passed. The unwinding can then be carried out mainly in a fixed primary position 10.1. With a fixed solution can be noticeably worked towards a reduction of costs. As the unwind progresses, the machine reel may be changed from the fixed primary unwinding position to unwinds having a secondary brake generator. The pair of carriages moves the bottom of the machine roll preferably in a Zusammenfümmenfügeposition.

In Fig. 1, the movements 4 'and 17' of the body 4 can be generated electrically (for example servo-controlled) and / or hydraulically and / or pneumatically or by any combination of these operating modes. Preferably, the movement 4 ', 17' of the body 4 comprises a linear shape or is completely linear. The trajectory 4 ', 17' of the body 4, in particular the path of movement of the joining roller 12 located in a waiting position for assembly with respect to the body 4, can be directed to a sleeve of the machine roll 13 located in the primary position, but the same can just as well Trajectories pass the sleeve. With a suitable choice of trajectory, the geometry of the unwinder can be manipulated in such a way that the covering angle of the web over the rollers for the joining device can be chosen appropriately. Here, in order to minimize the fluttering of the web, the covering angles of the web are arranged sufficiently large above the guide rollers and the tension of the web can be suitably controlled. The trajectory of the body can be chosen to be compact in geometry in such a way that the space provided by the movement of the joining device can be minimized for the duration of the passage of the machine roll.

FIG. 2 illustrates an embodiment of a joining device 1 for a continuously operating unwinder 10. The joining device comprises a body 4, which is movably arranged along (arrow 4 ') of a first movement path, for example with a first onto the bodies 4 acting actuator pair. A first guide roller 2 is fixed to the body 4 in a fixed position. In connection with the body 4, a joining roller 12 movable along a second movement path and a second guide roller 3 movable along a third movement path are fastened. The web is arranged to run during assembly over the aforementioned three rollers for the joining device 1.

Preferably, the joining roller 12 and the second guide roller 3 with drives 12 'and 3' equipped rollers that are rotatable. When unwinding, the tension of the web 4/9 Austrian Patent Office AT 13 786 Ul 2014-08-15

Brake generators regulated. The drives 12 'and 3' can also be used in some cases to control the tension of the web. The joining roller 12 and the second guide roller 3 are fixed to a lever device comprising levers 5; on these levers, the joining roller and the guide roller are stored. The hinge point of the levers 5 is positioned between the joining roller 12 and the second guide roller 3 and fixed to the body 4 in such a manner that the running length of the web before joining and the running length of the web during assembly can be kept substantially equal. With the movement of the levers 5, the trajectories of the joining roller and the second guide roller during the closing movement 17 'of the Fügewalzenspalts 17, i. the working movement for assembly, controlled.

2, the joining device 1 is shown in one of the Fig. 1 corresponding position before separating the web W1. The joining roller 12 and the second guide roller 3 are rotated by the lever 5 in the working position. In the rear position of the lever 5 (basic position of the lever), the joining roller 12 and the second guide roller 3 are shown with a broken line.

In Fig. 2, the large movement 4 'between the basic position of the joining device 1 and the ready position for assembly with the first actuator pair, which acts on the operating and drive side arranged body 4, and the actual joining movement 17' performed with the second pair of actuators acting on the levers 5.

2, by means of the movement of the body 4, the approximate movement of the joining device 1 and thus the joining roller 12 can be performed. By means of the movement of the body 4, the joining device 1 can be removed farther away from the machine reel 13 to allow the machine reel to move from the primary position to the secondary position. The movement 4 'of the body 4 can be generated electrically (for example servo-controlled) and / or hydraulically and / or pneumatically or by any combination of these modes. The movement 4 'of the body 4 is preferably linear. The path of movement 4 'of the body 4, in particular the path of movement of the joining roller 12 located in the basic position with respect to the body 4, can be directed to a sleeve of the machine roll 13 located in the primary position, but the said paths of movement can just as easily pass through the sleeve. With a suitable choice of trajectory, the geometry of the unwinder can be manipulated in such a way that the covering angle of the web over the rollers for the joining device can be chosen appropriately. Here, in order to minimize the fluttering of the web, the covering angles of the web are arranged sufficiently large above the guide rollers and the tension of the web can be suitably controlled. The trajectory of the body can be chosen to be compact in geometry in such a way that the space provided by the movement of the joining device can be minimized for the duration of the passage of the machine roll.

Preferably, the body 4 in Fig. 2 (corresponding to Fig. 1) forms a carriage which is arranged to move on conductors 6 on a support surface 7. The support surface may be formed by a floor, a machine bed formed in the floor by, for example, casting, or by a body construction of the fiber web machine.

The lever device 5 or the movement of the lever 5 can be used or generated electrically and / or hydraulically and / or pneumatically or by any combination of these modes.

In the most advantageous case, the web length between the second brake generator and the next web-supporting point (for example, coating station) does not change at all or as little as possible. The first brake generator is arranged at the primary position and the second brake generator at the secondary position.

In Fig. 3, instead of an empty old winding core, a machine roller 11 moved in the horizontal direction has been shown, which has passed the joining device 1, which has been moved away from the primary position along its trajectory 4 ', Austrian Patent Office AT13 786U1 2014-08-15 is preferably in its basic position, and the body 4 is positioned, for example, in the lower part of the range of movement (when using the joining device in Fig. 2, the lever device 5 is positioned in the home position). The joining roller 12 and the second guide roller 3 of the joining device are shown at the bottom in Fig. 3 with a broken line in the basic position, whose position is marked during the previous assembly with a dashed line.

In Fig. 4, the new machine roll 13 has been brought to the primary position, the adhesive tape 14 prepared for assembly on the machine roll 13 and begun with the acceleration of the machine roll 13 from the surface speed to the operating speed. The web goes to the end of the idling machine roll 11, whereby the approaching movement 4 'of the joining device is started from the basic position shown with a broken line to get closer to the new machine roll 13 in the ready position for the joining movement 17', from the old web W1 is pressed with a working movement of Fig. 5 to the new web W.

In Fig. 5, the position of the joining roller 12 and the second guide roller 3 of the joining device 1 is illustrated at the starting point of the approximate movement with a dashed line. When using the joining device in Fig. 2, the position of the joining roller 12 and the second guide roller 3 of the joining device 1 in the basic position of the lever device 5 is shown with a broken line. The position of the joining roller 12 and the second guide roller 3 in the illustrated in Fig. 1 end position of the working or joining movement 17 'is shown with a solid line.

According to some embodiments of the invention, the unwinder and its joining device may be arranged as a flat construction, which is positionable in the center of the coating machine by means of a traversing device for an Opticart drum. By means of the illustrated construction, product costs can be reduced, the control of the scraps of paper resulting from the assembly can be improved, and the production of paper chips in the jointing nip can be prevented. With fast lines, the effect of a sequence constraint can be significantly reduced or eliminated. By means of the illustrated construction it is possible to use components of known rewinders as well as in electrical solutions a cost effective automation system integrated with the servos.

The above description offers infinite examples in some embodiments of the invention. It will be understood by those skilled in the art that the invention is not limited to the details shown, but that the invention may be practiced otherwise. Some features of the illustrated embodiments may be used without the use of other features.

As such, the foregoing description is to be considered as illustrative of the principles of the invention and not as limiting the invention. Thus, the scope of the invention is limited to the appended claims. 6.9

Claims (7)

Austrian Patent Office AT 13 786 Ul 2014-08-15 Claims 1. Continuously operating unwinder (10) for a fiber web machine, which has a primary position (10.1.), a secondary position (10.2) and a joining device (1) which has a joining roller (12). and apparatus for moving an emptying machine roll and a new machine roll substantially horizontally, characterized in that the joining device (1) comprises a movable body (4) and the joining roller (12) is attached at its ends to the body in which a smaller joining movement (17 ') of the joining roller (12) to be realized with the body (4) by means of an actuator for closing and opening a joining roller gap (17) and a larger approach and removal movement (4') of the joining roller (12) with respect to a machine roll (11) to be joined. 2. unwinder according to claim 1, characterized in that the joining device (1) further comprises a second guide roller (3) on the body (4) in the direction of the unwound web (W, W1) after the joining roller (12) in the manner is fixed, that the joining roller and the second guide roller move simultaneously with the movement of the body. 3. unwinder according to one of claims 1 or 2, characterized in that the joining device (1) comprises a lever device for supporting the joining roller (12) and the second guide roller (3) at the ends thereof in the lever belonging to the lever (5 ) that the hinge point of the lever between the joining roller and the guide roller is positioned and attached to the body (4). 4. Unwinder according to one of claims 1 to 3, characterized in that the joining device (1) further comprises a first guide roller (2) which is positioned in the running direction of the unwinding web (W, W1) in front of the joining roller (12) the first guide roller (2) is preferably mounted in a fixed position with respect to the body (4). 5. Unwinder according to one of claims 1 to 4, characterized in that the movement path (4 ', 17') of the body (4) comprises a linear shape. The unwinder according to any one of claims 1 to 5, characterized in that the joining device (1) comprises a first pair of actuators arranged to act on the operating and driving side bodies (4) against which the rollers are fastened for the joining device (1). 7. unwinder according to claim 6, characterized in that the joining device (1) comprises a further actuator pair, which is arranged to the on the operating and drive side of the bodies (4) arranged lever (5) for the joining movement (17 '), wherein of the rollers of the joining device (1) at least the joining roller (12) is mounted at the ends of the levers. For this 2 sheets drawings 7/9