FI121174B - Method of rolling a web roller and web rolling device - Google Patents

Description

The invention relates to a method for winding a web roll with a carrier roller, wherein the web is wound around the cores with the radially supported support of the first and second carrier rolls or the like, and wherein the central portion of the roll is supported by the inking device has a first degree of freedom parallel to the end of the roll.

The invention also relates to a web winding apparatus comprising a first and second carrier rolls supported by a web roll, a guide arrangement substantially vertical to the plane formed by the axes of rotation of the first and second rolls, providing a core locking device adapted to the guide arrangement. the first degree of freedom of its first forming roll, and the transfer means of the sleeve locking device, which allows the locking device 15 of the second to differ from the first degree of freedom of the second formed roll.

Longitudinal cutters are known in the art which use variable geometric carrier rollers to roll the partial rolls after the length of the web, in which one or both of the carrier carriers / rollers carrying the roll are movable. The horizontal position of the center of the roll formed in such variable geometry winders depends on the relative position of the rollers / rolls and the diameter of the roll. In the reels, the reels are wound around the sleeves. The longitudinal successive cores are locked in their backs by a core reader 25 at each end. It is known in the art to have a core locking device which is disposed on a guide arranged in connection with the reel as the diameter of the reel increases as its center moves. This changes the position of the core locking device while driving. The position of the core locking device moving away from the carrier bars also changes as the direction of movement of the centers of the formed rollers changes as one or both rolls move in the variable geometry roller as the rolling progresses.

The sleeve locking device must, in addition to having controlled roll rotation supported in axial direction, have a substantially vertical degree of freedom which essentially corresponds to movement due to the increase in diameter of the rolls and a substantially horizontal degree of freedom required since e.g. not linear and straightforward.

Publication FI 116281 discloses a socket locking device which is mounted on a guide carriage movable on rails at the end of a support arm. This can accomplish the aforesaid substantially vertical and horizontal movement of the center of the rolls during winding 5. As the core locking device pivots, the pivoted core locking device and its support arm apply a force to the center of the roll that is dependent on the pivot angle and the mass of the device. Such an arrangement, however, requires constant control of the reducing force, and the weight of the core lock also affects the vibration characteristics of the core locking device.

It is an object of the present invention to provide a web winding device and a method for simpler control of the winding process.

In this context, the terms carrier roll, carrier roll, and roll roll should be understood to mean the word roll, an assembly of multiple rolls and an endless belt loop, or the like. In addition, the existence of a vertical and horizontal degree of freedom here means that the motion may include a component in this direction, but the resultant of the components, the actual motion may deviate from the vertical and horizontal directions.

The objects of the invention are achieved by a method of winding a web roll by a carrier roller, wherein the web is wound around the cores with a radial support of the first and second carrier rolls or the like, and wherein the center and wherein the winding event comprises at least a first step in which the movement of the center of the resulting roll is substantially guided to the first degree of freedom of the core locking device by moving the first carrier roll relative to the second carrier roll during roll. The invention is characterized in that the sleeve locking device has a second degree of freedom which is lockable and unlockable parallel to the surface of the roll and deviating from the first degree of freedom, and that the second degree of freedom of the sleeve locking device is locked.

In this way, in the winding, the core locking device forms a very rigid assembly, which improves the quality of the winding process. According to one embodiment, the sleeve locking device is designed such that it has only a first degree of freedom in the direction of plane 3 of the roll end. In this case, it has a smaller mass and is thus more advantageous in terms of vibration control.

The sleeve lock thus has at least the first degree of freedom en-5 parallel to the plane of the end of the forming roll. According to a preferred embodiment, the core lock also has a second degree of freedom parallel to the plane of the end of the roll, the direction of which differs from that of the first degree of freedom. This allows for more flexible control of the winding process.

According to this embodiment, the winding operation comprises the second step of keeping the positions of the first and second carrier rolls unchanged and wherein the second degree of freedom of the core locking device is interlocked and unlocked so that the roller and / or core locking device is less force than specified. In this winding step, the center of the roll moves mainly in the direction defined by the roll growth. The position of the carrier rollers relative to one another affects the vibration behavior of the equipment. Therefore, the procedure of the second step of the invention is necessary under certain circumstances. However, many factors such as paper quality, equipment geometry and structure, speed and roll size affect the rollover event.

20

According to one embodiment of the invention, the core locking device also has a degree of freedom parallel to the end of the second roll, the direction of which differs from that of the first degree of freedom. In this first step, the second degree of freedom of the core locking device is locked.

25

According to an embodiment of the invention, the force exerted on the winding core and / or the core locking device is measured, and the second degree of freedom of the core locking device locked is considered such that the measured force is less than a predetermined force.

30

According to another embodiment of the invention, the first carrier roll is controlled by determining or measuring the diameter of the roll and, based on this, calculating, on a predetermined model, the position of the first carrier roll at each time point.

35 4

According to yet another embodiment of the invention, the first carrier roll is controlled by calculating the position of the first carrier roll at each instant in a predetermined pattern. The model may be determined experimentally or computationally.

According to yet another embodiment of the invention, the force exerted on the winding core and / or the core locking device is measured and that the first carrier roll is controlled such that the measured force is less than a predetermined force.

The method according to the invention is particularly advantageous in a carrier roller 10 in which the carrier rolls have different diameters.

The objects of the invention are also achieved by a method of winding a web roll with a carrier roller, which comprises first and second carrier rolls, the position of which with respect to one another can be changed. In the method, the web is wound around the cores, radially supported by the first and second carrier rolls or the like, and wherein the center of the roll is supported in the axial direction of the roll by the core locking means The method is characterized in that the winding event comprises the step of keeping the positions of the first and second carrier rolls unchanged and wherein the second degree of freedom of the core locking device is limited by applying a predetermined force to the winding core.

In practice, the degree of freedom can be limited by damping motion, braking, or total locking. This also affects the vibration behavior of the core locking device advantageously reducing the susceptibility to oscillation. In practice, this can be accomplished by limiting the movement of the actuating members of the core locking device, for example, based on the force measurement of its brake device. The force measurement can also be located, for example, on the spindle of the core locking device.

30

According to one embodiment, the degree of horizontal freedom is limited by locking and unlocking the degree of freedom so that a lower force is exerted on the reel core during locking of the horizontal freedom of the core locking device.

35 5

The objects of the invention are achieved by a web winding apparatus comprising a first and second carrier rolls supported by a web roll, a guide arrangement substantially vertical to the plane formed by the axes of rotation of the first and second rolls, providing a first locking device for the core the degree of freedom, the means for transferring the locking device, which allows the locking device to have its second horizontal degree of freedom. The winding apparatus according to the invention is characterized in that the position of the carrier rollers of the winding apparatus relative to one another can be changed during the operation of the winder and that the second degree of freedom of the core locking device is lockable and unlocked during the winding.

According to one embodiment, the transfer means of the sleeve locking device comprises a shaft portion rotatably fitted at one end to the body portion of the sleeve locking device, at one end of which the shaft of the sleeve locking device is disposed.

15

According to another embodiment, the transfer means of the core locking device comprises an auxiliary body part fitted to the body of the core locking device, the linear movement of which is supported by the guide rails substantially perpendicular to the direction of movement enabled by the guide arrangement.

Other features specific to the method and apparatus of the invention will be apparent from the appended claims.

The advantages achieved by the invention include e.g. the following: - the tendency of the locking device to oscillate during winding is minimized, - the selectable position of the carrier rolls relative to one another improves the ability to minimize vibration of the rollers.

- the lockable second degree of freedom of the locking device enables the winding process to reduce the risk of the eccentricity of the reel cores

In the following, the invention and its operation will be described with reference to the accompanying schematic drawings, in which Figure 1 illustrates a prior art solution, Figure 2 shows a preferred embodiment of the invention, Figure 3 illustrates another preferred embodiment of the invention, and the flow of the winding process according to an embodiment of the invention.

The carrier roller of Fig. 1 comprises a carrier roller 10, the main parts of which are rollers, front roll 12 and rear roll 14. The front roll 12 here is an assembly of two rolls and a belt or harness arranged to rotate them. The reel-up the outlet of the web forming the support of the carrier rolls one or more axially successive roll in the vicinity of both ends 16 of the reel carrier rollers is substantially vertical guide rail 18. The guide rails is along the movable direction of arrow 22 as indicated by adapted to the core locking device 20 in the core locking device comprises a 10 base portion of the core locking device 26 at one end rotatably arrow 28 indicated by a fitted shaft portion 28, at one end of which a mandrel 30 of the core locking device is disposed. The roll core, which is typically a sleeve, is supported by winding via a spindle 30 on the sleeve locking device 20. In prior art solutions, the movement of the center of the roll formed by the line L in Figure 1 is non-linear and is therefore required by the prior art a continuous degree of horizontal freedom, that is to say movement of the mandrel 30 in a substantially horizontal direction.

In an embodiment of the invention shown in Fig. 2, the carrier roller 10 is also used and in Fig. 2 the same reference numbering is used as in Fig. 1 20 to the extent that the respective elements are involved. The reel according to the invention also comprises reel rolls, front roll 12 and rear roll 14. In this embodiment, the front roll 12 is in fact also an assembly of two rolls and a belt or belt assembly arranged to rotate them. The web fed to the reel is supported by the carrier rolls to form a plurality of axially successive rollers 16. The proximal ends of the mo-25 roller carrier rolls have a substantially vertical guide 18, only one of which is shown in this disclosure. Each of the guide rails is movable along the direction of arrow 22 as indicated by (allows the first degree of freedom), the core locking device adapted to the core locking device 20 designed to keep the winding cores entire time the same positions in the axial direction but allows the cores to move in the vertical direction almost without resistance 30, and often also the machine direction.

[0029] the core locking device comprises a body portion of the core locking device 26 at the other end 28 as indicated by the arrow (to enable the second degree of freedom) 28 rotatably fitted to the second shaft portion 28. The shaft member end is adapted to the core locking device 30. This spindle 35 is the core locking transfer member. The reel core is supported by the winding spindle 30 and the socket seat 31 to the socket locking device 20.

7

The variable geometric length winder carrier roller shown in Fig. 2 further comprises, in connection with the socket locking device, a shaft portion within the arcuate movement path 24, comprising a brake disk 34 and an actuator 5 acting therewith, . In this case, the brake may, for example, be hydraulically or pneumatically actuated.

The brake actuator 36 is fitted to the shaft member via a force measuring member 38. Preferably, the pivoting force exerted on the arm portion is measured while the roller is running.

The sleeve locking device also comprises a power unit 21 coupled between the shaft portion 28 and the frame portion 26. The power unit may be, for example, a hydraulic cylinder or a pneumatic cylinder. With the help of it it is possible to move the shaft.

15

The support of the rear roller 14 of the roller comprises a roller transfer mechanism 40 with its power unit, which allows the roller position to be changed while the roller is running.

The reel also comprises a control system 100 for controlling the operation of the reel. The control system is in communication with the transmission mechanism 101 of the rear roller 14, as well as the core locking device, for controlling it and its actuators and for transmitting measurement data to the control system. The sleeve locking device preferably has at least the aforementioned force measuring member 38 and also an angle measuring sensor (not shown) of the arm member 28.

25

The roller shown in Fig. 2 operates in such a way that as the roller progresses, thus the roller size increases continuously and its center shifts along a given path as determined by the roller geometry, mainly the size of the rollers 12, 14 and the rear roller 14. According to the invention, the winding event comprises at least a first step 30 in which the movement of the center of the resulting roll is substantially directed to a vertical degree of freedom 22 of the sleeve locking device by moving the rear roll 14 here representing the first carrier roll. This direction is parallel to the direction of the conductor arrangement 18. Thus, the substantially horizontal degree of freedom 35 28 of the core locking device is lockable. This has the advantage that the effect of the core locking device on vibrations is minimized. The locking is effected by the control system 100 directing the brake actuator 36 to lock the position of the shaft member against the surface of the brake disk 34. According to the invention, the locking can be intermittent and the brake release time is, however, less than the locking time. When controlling the action of the reel in this way, it is preferable to use a flexible connection between the spindle locking device spindle and the socket seat.

5

Thus, the movement of the center of the rolls can be controlled to occur substantially linearly along the path of movement L 'by moving one of the rolls from the supporting rolls 14 in a suitable manner. The movement of the roll 14 is determined in accordance with a preferred embodiment of the invention by calculating the position of the roll at each instant from the diameter of the rolls and the geometry of the machine. This mode of control allows the horizontal degree of freedom to be locked in place during winding or significantly suppressed by braking.

The movement of the roller bearing roller 14 can also be accomplished by measuring the force exerted on braking the horizontal degree of freedom of the core locking device 20.

In this case, the movement of the roll 14 is controlled to minimize or maintain this force below a predetermined set point. The required movement of the carrier roll relative to the roll diameter can also be determined experimentally.

The horizontal degree of freedom 24 of the sleeve locking device 20 can also be braked or lockable 20 during winding, so that the brakes 34 fitted to the sleeve locking device are guided on and off by the braking force measured by the force measuring member 38 so that the force constantly need to move. When the horizontal direction of the core locking device is largely locked, the vibration reduction effect of the core locking device 25 is achieved, at least to some extent.

Figure 3 shows a solution functionally similar to Figure 2. The reference numbering of Figure 3 corresponds to the reference numbering of the elements and features of Figure 2. In this embodiment, the horizontal degree of freedom is achieved by a second carriage 28 'which is represented by a dashed line instead of an articulated arm portion. To enable this, the second carriage 28 'is arranged to be movable by the second conductors 28' in a manner similar to that of the embodiment of Figure 2.

Figure 4 illustrates the roll center movement of a roll process according to the invention in accordance with one embodiment. The structure of the reel itself differs from the embodiments of Figures 2 and 3 in that the trajectory of the rear roller 14 9 is at an angle to the horizontal. Here, the roll forming is first guided to occur so that as the roll 16.1 grows, its center is advanced in the direction and position indicated by the line L1, which is thus aligned with the direction of movement of the guide arrangement 18. During this time, the horizontal degree of freedom of the core locking device has been locked and the rear roller 14 has moved towards the front roller 12. At position P1, where the position of the roller is illustrated by roller 16.2, the brake actuator 36 of the core locking device is released. The rear roller is then in position 14.2. The roll center has shifted due to the horizontal degree of freedom release while the roll along center line L2 of the roll has taken place with the rear roll in position 14.2. After the roll center gun-10 man P3, the rear roll is moved away from the front roll toward position 14.3 as the roll center runs along line L3 to a point P3 corresponding to the rear roll position 14.3. After this, the winding is continued in the second position in the direction indicated by the straight line L4 with the horizontal degree of freedom of the locking device locked.

As noted above, a simple and easy-to-use apparatus has been developed which eliminates a considerable number of disadvantages of the prior art. However, it should be noted that only some of the most preferred embodiments of the invention have been described above. Thus, it will be understood that the invention is not limited to the above embodiments, but may be practiced in many ways, for example, by combining features of different embodiments within the scope of the appended claims.

Claims (12)

A method for winding a web roll with a carrier reel (10), wherein the web is wound around the cores with radial support of the first (14) and second carrier rolls 5 (12) or the like and wherein the center of the roll is supported in the axial direction of the core locking device having a first degree of freedom (22) in the direction of the end of the roll, and wherein the scrolling action comprises at least a first step of controlling the movement of the center of the formed roller substantially parallel to the first position of the core locking device (20) characterized in that the sleeve locking device (20) has a second degree of freedom, optionally lockable and unlockable, parallel to the surface of the roll and deviating from the first degree of freedom, and that the second degree of freedom of the sleeve locking device east. 15 Method according to Claim 1, characterized in that the winding operation comprises a second step in which the positions of the first (14) and second carrier rolls (12) are kept constant and the second degree of freedom of the core locking device is intermittently locked and unlocked. (20) applies a force less than a predetermined force while locked in the horizontal degree of freedom of the core locking device. Method according to claim 1 or 2, characterized in that the force exerted on the winding core and / or the locking device is measured, and that the second degree of freedom of the locking device is held such that the measured force is less than a predetermined force. Method according to claim 1, characterized in that the first carrier roll is guided by determining or measuring the roll diameter and calculating on the basis thereof a predetermined pattern at the position of the first carrier roll at each time. A method according to claim 1, characterized in that the first carrier roll is controlled by calculating the position of the first carrier roll at each time point in a predetermined pattern. 6. A method according to claim 1, characterized in that the force exerted on the reel core and / or the socket locking device is measured and that the first carrier roll is guided such that the measured force is less than a predetermined force. A method of winding a web roll with a carrier roll reel (10), comprising first and second carrier rolls (12) having variable positions, wherein the web is rolled around the cores of the first (14) 10 and second carrier rolls (12) or the like supported by and wherein the center of the roll is supported in the axial direction of the roll by a core locking device (20) via a core seat (31), the core locking device having a first roll end plane and a second roll end plane with a the core comprising the step of keeping the positions of the first and second carrier rolls unchanged and limiting the second degree of freedom of the core locking device (20), characterized in that the second degree of freedom of the core locking device (20) is limited y lower force. A method according to claim 7, characterized in that the second degree of freedom of the sleeve locking device (20) is intermittently locked and unlocked so that a lower force than a predetermined force is applied to the reel core while the sleeve locking device is horizontally locked. Method according to claim 7, characterized in that the winding event comprises the step of locking the second degree of freedom of the core locking device and controlling the movement of the center of the roller substantially parallel to the first degree of freedom of the core locking device (20). 30 A web winding apparatus comprising: - a first (14) and a second (12) carrier roll, supported by a web roll (16), - a guide arrangement (18) substantially vertical to the plane formed by the rotational axes of the first and second rolls, a core locking device (20) adapted to the conductor arrangement, which forms a degree of freedom for the core locking device (22) parallel to the end plane of the first forming roll, allowing the second locking member of the first a non-directional degree of freedom (24) in which the position of the winding device carrier rolls (12, 14) relative to one another can be varied during roller operation and the second degree of freedom (24) of the core locking device (20) can be locked and released brake units a (32) for locking and releasing the second degree of freedom. The web winding apparatus according to claim 10, characterized in that the transfer means of the core locking device comprises a shaft portion (28) rotatably connected to the body portion of the core locking device, at one end of which the shaft of the core locking device is disposed. The web winding apparatus according to claim 10, characterized in that the transfer means of the core locking device comprises an additional core part (28 ') fitted with auxiliary wires to the core part of the core locking device, whose linear guide movement is substantially perpendicular , and to which additional body part the spindle locking device spindle is fitted.