FI89701B - RULLSTOL OCH FOERFARANDE FOER JUSTERING AV NYPPRESS VID RULLSTOL - Google Patents

Description

8 9 7 01

The invention relates to a winding device comprising a first rotating roll and a second rotating roll forming a nip, into which nip the web is introduced and in which nip the nip is acted upon by the nip. the web is wound on said second rotating roll, the second rotating roll being supported by winding rails or the like, the winding device comprising first means for changing the position of the second rotating roll relative to the first rotating roll to adjust said nip pressure, the first means comprising winding rails or the like.

The invention also relates to a method for adjusting the nip pressure in a winding device comprising a first rotating roll and a second rotating roll forming a nip into which a web is introduced into the nip, the nip being subjected to a nip pressure and after which the web is wound on said second rotating roll. is supported by winding rails or the like, in which a method for changing the relative position of the first rotating roll of the winding device and the second rotating roll 20 is tilted by rolling rails or the like.

In fixed winding, at the beginning of winding, due to the bending of the spool irons, i.e. the spool rolls, it is problematic to obtain a uniform line or nip load between the spool and the winding cylinder by known methods. In the primary winding, due to the support of the spool roll, the line load in the middle of the edges is considerably larger. In secondary rolling, the loading effect of the rolling forks causes a greater line load on the edges than in the middle.

In the case of the replacement of some winders, e.g. a pope winder, from the primary rails to the secondary rails 30, discontinuities between the winding cylinder and the spool roll, e.g. line pressure spikes, easily occur, which cause bottom wrecking.

89701 2

With regard to the prior art, reference is made to GB application 2 009 108, which discloses a winding device in which the members acting on the nip pressure are arranged to change the position of the second rotating roll relative to the first rotating roll and in which the first members comprise means for changing the inclination of the rails.

5

It is an object of the invention to provide a reel in which the above problems do not occur. It is a particular object of the invention to provide a reel in which the nip load between the spool roll and the reeling cylinder is uniform. It is a further object of the invention to provide a reel in which there are no discontinuities causing bottom wrecking.

In order to achieve the above and later objects, the winding device according to the invention is mainly characterized in that the winding device comprises second means for applying additional forces to the ends of the second rotating roll to adjust the axial line load of the second rotating roll.

The method according to the invention is mainly characterized in that in the method additional forces are applied to the ends of the second rotating roll in a direction perpendicular to the direction of the axis of the roll.

20

The line load is made uniform in the transverse direction of the machine by placing the tampon iron or roll relative to the winding cylinder on a support so that the force component passing through the centers of the tamping iron and the winding cylinder generates the force required for the line or nip load. The line load is adjusted to change the position of the tampon iron relative to the winding cylinder by 25 miles, and thus the magnitude of the force component causing the line load changes. A suitable line or nip load is thus caused by the own weight of the spool roll and the web wound on it. The winding of the track on the spool roll against the winding cylinder is started at a point where the force component of the traction force on the winding roller in the direction of the center of the winding cylinder is suitable to form a line load.

89701 3

The change of the force component is achieved in several different ways, e.g. by adjusting the inclination of the rolling rails or forks. As the swab size increases, the slope is reduced to fit.

According to the invention, discontinuities occurring in the exchange or transfer operation of the paper winder from the primary rails to the secondary rails can be eliminated, e.g.

When the full spool rotates on the secondary rails, it is moved to the braking position, after which the primary rails 10 can be moved to the optimal inclination position for line pressure so that the line load, i.e. line pressure, is uniform across the entire machine. As the size of the tampon increases, as the rolling progresses, the angle of inclination of the primary rails is reduced. Replacement, i.e. transfer to the secondary rails, takes place by moving the secondary rails to the corresponding inclination angle with the primary rails, whereby the replacement tampon rolls over the splice 15, during and after which the primary and secondary rails move synchronously adjusting the line load by changing the inclination angle.

According to the invention, additional forces can be exerted on the ends of the bump iron or roll in a direction perpendicular to the direction of the roll axis, whereby the nip or line load 20 in the transverse direction of the machine, i.e. in the direction of the bump iron axis, can also be controlled and adjusted by additional forces. If desired, the above-mentioned adjustment measures affect the transverse line load profile and at the same time keep the total line load level constant, the inclination angle can be adjusted so that the effect of additional forces on the total line load level is compensated.

25

The method according to the invention is well suited for application when starting rolling directly from rails. In this case, geometry-based load control can be used. As the paper roll formed on the tampon roll increases, the line load-increasing effect of the traction on the ground decreases.

· '· 30 3 9 70 Ί 4

Other advantages are also achieved with the system according to the invention. For example, there is no change at the beginning of the winding and the load situation can be seen in nature by observing the inclination of the rails. In addition, the solution according to the invention avoids sudden changes in line pressure and other loads, and the adjustment of the line load 5 according to the invention is mechanically easy and technically easy to control.

In the following, the invention will be described in more detail with reference to the figures of the accompanying drawing, to which, however, the invention is in no way narrowly limited.

Figures A and B schematically show some nip or line load problems known from the prior art, the solution of which is the object of the invention.

Figure 1 schematically shows a winding event at the beginning of the winding.

Figure 2 schematically shows a winding event at the end of winding.

Figure 3 schematically shows an arrangement according to the invention for providing a uniform line or nip pressure.

Figure 4 schematically shows a further embodiment of the invention.

Figure 5 schematically shows an embodiment of an ice arrangement according to the invention which is suitable for use in endless winding.

Fig. 6 schematically shows another embodiment of an arrangement according to the invention suitable for use in endless winding.

Fig. 7 schematically shows an ice arrangement according to the invention adapted to an exchange event.

30 8 9 70 1 5

According to Fig. A, in the primary winding, the line load between the winding cylinder 15 and the tamping roll, i.e. the tamping iron 20, is greater in the middle than at the edges. The line load in the middle is indicated by arrows Z. The higher line load in the middle is due to the support effect of the spool roll 20, which is schematically indicated by arrows X.

5

Figure B shows how, in the secondary winding, the loading effect of the spool roll 20, schematically indicated by arrows X2 in the figure, causes a greater load Z2 on the edges than in the middle.

According to Figure 1, in a winder, a web, e.g. a paper web W, is wound from a first roll, i.e. a winding cylinder 15, to a second roll, i.e. a spool roll 20, both rolls 15,20 are rotatable and form a nip N into which nip W is introduced and after which n is wound web W to a rotating roll, i.e. a spool roll 20, supported by the winding rails 10.

15

According to Fig. 1, the winding of the web W on the spool roll 20 against the winding cylinder 15 is started from the point where the component Gr of the wind force G parallel to the center of the winding cylinder 15 is suitable. In this case, the line load acting on the nip N is uniform in the entire transverse direction of the machine and does not become too great in the middle. In the figure, the direction of rotation of the blade 15 of the winding cylinder-20 is denoted by the reference numeral S1 and the direction of rotation of the spool roll or iron 20 by the reference numeral S2. The tampon roll 20 is supported by rollers 10.

According to Figure 2, geometry-based load control is utilized. 25 As the web roll wound on the tampon roll 20 increases, the line-loading effect of the ground traction G decreases, i.e., the angle / 31 <j32.

As shown in Fig. 3, the line load in the transverse direction of the machine, i.e. in the axial direction of the tampon roll 20, is uniform at the nip N by placing the tampon 30 on the support relative to the winding cylinder 15 so that the ground force G passes through the centers of the component Gr forms the force component required for the line load. The line load is adjusted by changing the position of the tampon iron 20 relative to the winding cylinder 15 so that the nip point N changes and at the same time the magnitude of the force component Gr causing the line load changes. The easiest way to change the force component Gr is to adjust the inclination or angle a of the winding rails 10. The line load is then Gr = G · sin a, i.e. the own weight of the to maintain a uniform line or nip load, preferably from about 20 ° to 1 °.

10

The angle α of the rolling rails 10 is adjusted by means of an actuator, e.g. a screw jack 30, a cylinder or the like. Many known arrangements are suitable for adjusting the angle of inclination α. The winding rails 10 are pivotally attached to the winding cylinder 15, preferably the winding rails 10 are articulated to the center of the winding cylinder 15.

As shown in Fig. 4, additional forces F are applied to the ends of the spool iron or roll 20 in the direction perpendicular to the axis of the roll by means of suitable members 35, e.g., spool roll support and transfer devices, so that nip or line loads in the transverse direction of the machine and adjust. If it is desired to influence the transverse line load profile via the additional forces F by the above-mentioned control measures and at the same time keep the total line load level constant, the inclination angle α can be adjusted so that the effect of the additional forces F on the total line load level is compensated.

25

The transverse line load of the machine, i.e. the axial line load, i.e. the nip load, is adjusted in the middle by changing the relative position of the winding cylinder 15 and the spool roll 20, e.g. With the help of additional forces F nip- 7 3 9 7 0 '! that is, the line load is increased or decreased in the edge areas. The total line load can thus be adjusted as desired in the nip.

According to Figure 5, the arrangement according to the invention is suitable for use when the winding 5 is endless. Figure 5 shows a structure using two systems of a rolling cylinder 15 - a rail 10. In Fig. 5, the guide rollers of the web W are denoted by reference numeral 25. According to the figure, as the size of the tampon 20 increases, the angle α is reduced. When the first spool 20 is filled, the web W is fed to a second winding system which operates in a corresponding manner.

10

Figure 6 shows another possibility for a system using two systems of a rolling cylinder 15 - a rail 10. The web W is guided through the guide rollers 25 to the winding cylinder 15, from there further to the spool roll 20 supported by the rail 10. At the end of the winding, the web W is fed to another winding system. Figure 6 shows in broken lines the position of the rails 10 and the tampons 20 when the tampon is full.

As shown in Fig. 7, e.g. The line pressure, i.e. the line load Gr, is uniform in the entire transverse direction, Gr = G · sin a. As the tampon 20 increases, the angle α is reduced as the diameter of the tampon 20 continues to increase. The transfer to the secondary rails 11 takes place by moving the secondary rails 11 to a corresponding angle α with the primary rails 10, whereby the replacement tampon rolls over the splice point, during and after which the primary rails 10 and the secondary rails 11 move in synchronism adjusting the line load. The secondary rails 11 can also be fixed, in which case the line load is adjusted in question. on the rails 11 normally by means of rolling forks.

The invention has been described above only with reference to some of its preferred embodiments. However, this is in no way intended to limit the invention to these examples 897018 only, but many modifications and variations are possible within the scope of the inventive idea defined by the following claims.

Claims (2)

A wheelchair assembly comprising a first rotating roller (15) and a second rotating roller (20) forming a nip (N) into which the nip (N) introduces the web (W), and into which nip (N) a nip pressure (Gr) acts on the web (W) and after which the nip (N) web (W) is wound on said second rotating roller (20), said second rotating roller (20) being supported on rolling rails (10) or the like; said wheelchair assembly comprising first means (30) for changing the position of said second rotating roller (20) relative to said first rotating roller (15) for controlling said nip pressure (Gr), said first means 10 (30) including said tilt changing means; (a) by the rolling rails (10) or vice versa, characterized in that the wheelchair assembly comprises other means (35) for providing additional forces (F) at the ends of the second rotating roller (20) for controlling the axial linear load of the second rotating rollers (20). 15 A method of controlling the nip pressure in a wheelchair device comprising a first rotating roller (15) and a second rotating roller (20) forming a nip (N) into which the nip (N) web (W) is inserted and inserted into the nip. which nip (N) a nip pressure (Gr) acts on the web (W) and after which nip (N) the web (W) is wound on said second rotating roller 20 (20), which second rotating roller (20) is supported on rolling rails (10) or the equivalent, in which a method for changing the mutual position between the first rotating roller (15) and the second rotating roller (20) is carried out on a slope of the rolling rails (10) or the like, characterized in that at the method causes additional forces (F) at the ends of the second rotating roller (20) in a perpendicular direction to the axis of the roller.