Method Of Wrapping A Rolled Roll And Wrapping Device

Abstract

The invention relates to a method of rerolling a rolled-up material web, in particular a rolled-up material web of an elastic material on a rerolling device. Furthermore, the invention relates to a rerolling device for performing the method. The inventive method of rerolling a rolled-up material web of an elastic material on a rerolling device having an-uncoiler and a recoiler, with the material web being rerolled from a large roll rolled up on the uncoiler and having a diameter D to a section roll to be rolled up on the recoiler, and with the uncoiler and/or the recoiler having an actuator, is characterized in that during rerolling, the diameter D of the large roll on the uncoiler and/or the diameter d of the section roll on the recoiler are continuously determined and the performance of an actuator is continuously adjusted by means of this determined parameter. The terms “continuously determined” and “continuously adjusted” are not only to be understood here as an actually continuous, i. e. ongoing, determining or adjusting process, but also as one that takes place in discrete time intervals, the determining taking place multiple times during the rerolling process.

Claims

1. A method of rerolling a rolled-up material web of an elastic material on a rerolling device having an uncoiler and a recoiler, the material web being rerolled from a large roll, having a diameter (D), on the uncoiler to a section roll to be rolled up on the recoiler; the uncoiler and/or the recoiler having an actuator; the method comprising: during rerolling, the diameter (D) of the large roll on the uncoiler and/or a diameter (d) of the section roll on the recoiler are continuously determined and performance of an actuator is continuously adjusted by means of a determined parameter.

2. The method according to claim 1, characterized in that the diameter (D) of the large roll rolled up on the uncoiler and/or the diameter (d) of the section roll to be rolled up on the recoiler are continuously measured by means of an optical sensor.

3. The method according to claim 1, characterized in that the diameter (D) of the large roll rolled up on the uncoiler and/or the diameter (d) of the section roll to be rolled up on the recoiler continuously measured by means of an electromechanical sensor.

4. The method according to claim 1, characterized in that the diameter (D) of the large roll rolled up on the uncoiler and/or the diameter (d) of the section roll to be rolled up on the recoiler are continuously measured by means of an electronic sensor.

5. The method according to claim 1, characterized in that the diameter (D) of the large roll rolled up on the uncoiler and/or the diameter (d) of the section roll to be rolled up on the recoiler are continuously determined by calculation.

6. The method according to claim 1, characterized in that the diameter (D) of the large roll rolled up on the uncoiler and/or the diameter (d) of the section roll to be rolled up on the recoiler are determined by means of a continuously determined roll weight.

7. The method according to claim 1, characterized in that the diameter (D) of the large roll rolled up on the uncoiler and/or the diameter (d) of the section roll to be rolled up on the recoiler are determined by means of the continuously measured speed of the material web on the large roll or the section roll, preferably on the large roll and on the section roll.

8. The method according to claim 1, characterized in that the diameter (D) of the large roll rolled up on the uncoiler and/or the diameter (d) of the section roll to be rolled up on the recoiler are calculated by means of the continuously measured speed of the material web and the rotational speeds of the rolls on the recoiler and on the uncoiler.

9. The method according to claim 1, characterized in that the diameter (D) of the large roll rolled up on the uncoiler and/or the diameter (d) of the section roll to be rolled up on the recoiler are determined by means of a cumulated layer thicknesses of the material web layers on one of the rolls.

10. The method according to claim 9, characterized in that the thickness of a layer of the material web is measured by means of an optical sensor.

11. The method according to claim 1, characterized in that all determined parameters are processed by a control unit.

12. The method according to claim 11, characterized in that a control unit controls the actuator.

13. The method according to claim 1, characterized in that the actuator is controlled manually.

14. The method according to claim 1, characterized in that the rerolling device has a drum which is arranged between the uncoiler and the recoiler and is displaceable vertically, the material web being guided over the drum.

15. The method according to claim 1, characterized in that replacement of the large roll on the uncoiler and/or of the section roll on the recoiler is performed without interruption of the rerolling process.

16. The rerolling device for performing the method according to claim 1.

Description

[0046] Other advantages, particularities and advantageous further developments of the invention become clear from the dependent claims and from the subsequent presentation of a preferred example of embodiment by means of the Figures, wherein

[0047] FIG. 1 is a schematic presentation of a rerolling device according to the invention.

[0048] FIG. 2 is a schematic presentation of a further embodiment of a rerolling device according to the invention.

[0049] FIG. 1 is a schematic lateral view of a rerolling device 1 according to the invention. A material web 100 rolled onto a large roll 210 having a diameter D on an uncoiler 200 is rerolled by the large roll 210 onto a section roll 301 having a diameter d and arranged on a recoiler 300.

[0050] The uncoiler 200 and the recoiler 300 each have an actuator 201, 301 by means of which the rolls 200, 300 can be driven and decelerated. During rerolling, the diameter D of the large roll 210 on the uncoiler 200 and the diameter d of the section roll 301 on the recoiler 300 are continuously determined, and using these determined parameters, the performance of the actuators 201, 301 is continuously adjusted.

[0051] The embodiments shown here are only given by way of example and are therefore not to be understood as limiting. Alternative embodiments considered by the person skilled in the art are equally covered by the scope of protection of the present invention.

[0052] FIG. 2 is a schematic presentation of a rerolling device 1. The large roll 210 is tensioned on an uncoiler 200 and driven by a belt drive (not discussed here in detail) as an actuator 201. By means of several drums 400, the material web 100 is partially deflected and/or stretched. In addition, the material web 100 is guided through a cutting station (not discussed in detail) which can perform several different cutting steps on the material web 100, if desired. Subsequently, the material web 100 is guided through a transverse cutting station (not discussed here in detail). Then the material web 100 is guided over and driven by an additional drum 400, which is a bearer drum. A second drum 400, which is also a self-driven bearer drum, is attached to this bearer drum 400. These two bearer drums 400 bear and drive the section roll 310 on the recoiler 300 until it has reached its desired dimension. In this way, these drums 400 form the actuator 301 in this example of embodiment. An additional drum 400, which is a lay-on drum, is positioned on the section roll 310. This lay-on drum 400 can be both driven and run passively. The lay-on drum 400 can drive the rolling speed of the section roll 310 on the recoiler 300, or it can be run passively by a recoiler 300.

LIST OF REFERENCE NUMBERS

[0053] 1 rerolling device [0054] 100 material web [0055] 200 uncoiler [0056] 201 actuator [0057] 210 large roll [0058] 300 recoiler [0059] 301 actuator [0060] 310 section roll [0061] 400 drum [0062] D diameter of material web roll on the uncoiler [0063] d diameter of material web roll on the recoiler