Reel-up for reeling of a fiber web

Abstract

A reel-up for reeling of a fiber web (W) around a reel spool (15B) to form a parent roll (20B; 20A) by use of a reeling nip (N) between a reeling cylinder (10) of the reel-up and the parent roll (20B) under reeling, has a primary reeling position and a secondary reeling position. The reel-up (10) has the reeling cylinder (10), substantially horizontal guides (14) and for each end of the reel spool (15A; 15B), loading arms (12,13; 16,17) and carriages (18) and the primary reeling position is fixed.

Claims

1. A reel-up for reeling a fiber web around a reel spool to form a parent roll, comprising: a first transfer guide and a second transfer guide arranged parallel to each other and extending in a machine direction and spaced apart in a cross direction; a fixed primary reeling position, comprising: a primary drive mounted to a bed fixed with respect to the first and second transfer guides, the primary drive arranged to cause a reel spool in the fixed primary reeling position to rotate; a pair of first primary loading arms one of said first primary loading arms mounted along the first transfer guide and one of said first primary loading arms mounted along the second transfer guide; a pair of second primary loading aims, one of said second primary loading aims mounted along the first transfer guide and one of said second primary loading arms mounted along the second transfer guide, wherein the second primary loading aims are spaced in the machine direction from the first primary loading aims; wherein each first and second primary loading arm is mounted to rotate on a pivot fixedly mounted with respect to the first and second transfer guides, and rotatable between a first position where the primary loading aims engage at most one side of a reel spool, and a second position where the primary loading arms do not constrain the movement of a reel spool; wherein while the first and second primary loading arms are engaged with a reel spool, the reel spool does not move in the machine direction; wherein the first primary loading aims and the second primary loading arms are arranged to receive therebetween a reel spool, and to hold the reel spool in a fixed machine direction position with respect to the first transfer guide and the second transfer guide; a reeling cylinder, mounted for vertical up and down motion below the reel spool as the reel spool is held fixed with respect to the first transfer guide and the second transfer guide between the first primary loading arms and the second primary loading arms, so that the reeling cylinder is upwardly moveable to engage the reel spool at a nip; a guide member arranged to bring a fiber web into engagement with the reeling cylinder so that the fiber web wraps and passes through the nip and winds about the reel spool; wherein the reeling cylinder is arranged to move downwardly as the fiber web forms a first part of a parent roll on the reel spool, with the first part of the parent roll in nipping engagement with the reeling cylinder; a secondary reeling position, comprising: a pair of carriages, one of which is movable alongside the first transfer guide and the other of which is movable alongside the second transfer guide, each of the carriages having an upstream and a downstream loading aim arranged to engage the reel spool and so hold the reel spool on the pair of carriages; wherein the pair of carriages is arranged to hold the reel spool at the same time as the reel spool is released from the primary reeling position; and wherein after being released from the primary reeling position the pair of carriages is arranged to move downstream alongside the first transfer guide and the second transfer guide while the first part of the parent roll forming on the reel spool remains in nipping engagement with the reeling cylinder until the parent roll is completed.

2. The reel-up of claim 1 wherein each of the upstream and downstream loading arms is mounted to rotate on one of the pair of carriages and rotatable between a first position where the upstream and downstream loading arms engage at most one side of a reel spool, and a second position where the upstream and downstream loading arms do not constrain the movement of a reel spool with respect to the carriages.

3. The reel-up of claim 2 wherein the first primary loading arms, the second primary loading arms, the upstream loading arms and the downstream loading arms are arranged to have a substantially upright position in which they support the reel spool, and a substantially horizontal position, in which they provide for release or a loading of the reel spool.

4. The reel-up of claim 2 wherein the primary loading arms are positioned inside and between the first transfer guide and the second transfer guide.

5. The reel-up of claim 2 wherein the upstream and the downstream loading arms and the carriages are located outside the first transfer guide and the second transfer guide.

6. The reel-up of claim 1 wherein the first transfer guide and the second transfer guide have horizontal guide surfaces which extend horizontally and on which a reel spool is arranged to traverse.

7. The reel-up of claim 1 further comprising a secondary drive mounted to one of the carriages and arranged to cause a reel spool in the secondary reeling position to rotate.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1A-1D are schematic side views of a reel-up in accordance with an advantageous example of the invention showing the operation of the reel-up.

(2) FIG. 2 is a schematic top view of the reel-up of FIGS. 1A-1D.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(3) During the course of this description like numbers and signs will be used to identify like elements according to the different views which illustrate the invention.

(4) In FIGS. 1A-1D and 2 is schematically shown an example of a reel-up comprising a reeling cylinder 10, a guide roll 11 for guiding the fiber web W onto the reeling cylinder 10. The reel-up also comprises at a primary reeling position primary loading arms 12, located in this case symmetrically inside transfer guides 14, and a primary drive and for the secondary reeling position secondary loading arms 16, 17 and a secondary drive located in one of the carriages 18.

(5) The carriages 18 move linearly on advantageously substantially horizontal transfer guides 14. The transfer guides may deviate from the horizontal direction +/30. The loading arms 12, 13, 16, 17 and carriages 18 are located in connection with each of the transfer guides 14, i.e. in connection with each end of the reel spool 15A, 15B/the parent roll 20A/20B. The secondary loading arms 16, 17 and the carriages 18 are located in this case symmetrically outside the transfer guides 14.The fiber web W is reeled around a reel spool 15A, 15B to a parent roll 20A, 20BB by means of a reeling nip N between the reeling cylinder 10 and the parent roll 20A, 20B under reeling, which reeling takes place in a primary stage in a primary position and in a secondary stage in a secondary position. The reeling cylinder 10 is driven by known methods, typically by a motor (not shown). The reeling cylinder 10 rotates and the parent roll 20A, 20B is formed around a reel spool 15A, 15B. The nip load is formed between the parent roll 20A, 20B under reeling and the reeling cylinder 10 and it is provided by moving the reeling cylinder 10. The reel spool 15A, 15B is mounted on bearings in bearing housings resting on the substantially horizontal transfer guides 14. The reeling is started and a parent roll 20B under reeling is formed around the reel spool 15B supported in the primary loading arms 12, 13 first in the primary position, which is a fixed position i.e. the reel spool 15B is not moved during the reeling in the primary position and then at a certain, desired diameter transferred to support of secondary loading arms 16,17 in the carriages 18 to be reeled in the secondary position, in which the carriage moves the parent roll 20a, 20B under reeling along the substantially horizontal 10 transferring guides 14. The nip load is formed between the parent roll 20A, 20B under reeling and the reeling cylinder 10 and it is provided by moving carriages 18. A finished parent roll 20A is moved along the guides 14 to an end position at the end of the guides 14 wherefrom the finished parent roll 20A is transferred to the next process step.

(6) The transferring guides 14 of the reel-up are substantially linear and transfer and reeling in the reel-up is thus provided along these substantially linear transfer guides 14. Empty reel spool 15C is brought to the primary reeling position, which is fixed in the machine direction for example along gravity based storage rails with stoppers, by a crane or from an upper storage, advantageously located above the reel-up, or by transfer arms, as shown by dashed line alternatives in the FIG. 1A. The reel spool 15B is located rotatably by primary loading arms 12, 13, which are advantageously located inside the transfer guides 14, into the primary in MD-direction fixed primary reeling position. The reeling cylinder 10 is moved upwards to form the reeling nip N between the parent roll 20B under reeling and the reeling cylinder 10. As the diameter of the parent roll 20B under reeling increases, the reeling cylinder 10 moves downwards but holding the reeling nip N in operation. When the diameter of the parent roll 20B under reeling reaches the desired limit the reeling is changed to the secondary reeling position. The reel spool 15B is moved to be supported by the secondary loading arms 16, 17 and the carriages 18 located outside the transfer guides 14. The movement of the carriages 18 is from the pick-up position from the primary reeling position to the position in which the finished parent roll 20A is relieved for further treatment. The stopping of rotation of the parent roll 20A is done advantageously in a separate break position, by which 35 the secondary loading arms 16, 17 and the carriage 18 can be earlier in the sequence released for the reeling of the next parent roll in the secondary reeling position. The parent roll 20A can also be stopped rotating in the secondary reeling position by the drive of the secondary reeling position. After the change of reeling position the reeling is continued in the secondary reeling position until the next change.

(7) In FIG. 1A in the reel-up is shown in a situation, in which the reeling of a parent roll 20B in the secondary reeling position, in which the reel spool is in support of the secondary loading arms 16, 17 and the carriage 18. The reel spool 15A and thus also the parent roll 20B are rotated and moved by the secondary drive, is nearly finished and thus the diameter of the parent roll 20a is close to the desired diameter. New, empty reel spool 15C has been brought to the reel up to the primary reeling position for example along gravity based storage rails with stoppers, by a crane or from an upper storage, advantageously located above the reel-up and has been moved to the primary reeling position to be located into the support of the loading arms 12, 13. In FIG. 1A the loading arm 13 on the side of the secondary reeling position is in its upright position and supports the reel spool 15B. The reel spool 15B has been moved over the in moving direction first loading arm 12, which is in its horizontal position, to the primary reeling position. The reeling cylinder 10 is in reeling nip N position with the almost finished parent roll 20B in the secondary reeling position. The fiber web W is guided via a guide roll 11 onto the reeling cylinder 10 and into the reeling nip N and onto the parent roll 20B.

(8) In FIG. 1B the reel-up is shown in a situation when the reeling of the fiber web W has been changed to the primary reeling position and the finished parent roll 20A supported in the loading arms 16, 17 of the secondary reeling position is moved along the guides 14 by the carriage 18 to be transferred to the next treatment stage. In the primary reeling position, which is fixed, the reel spool 15B and the parent roll 20B under reeling is supported by the loading arms 12, 13 of the primary reeling position and rotated by the center drive or a starter drive of the primary reeling position to the reeling speed. The reeling cylinder 10 has been moved in a substantially vertical direction upwards into reeling nip N contact with the parent roll 20B under reeling and as the reeling progresses the reeling cylinder 10 moves in a substantially vertical direction downwards. The fiber web W is guided by the guide roll 11 onto the reeling cylinder 10 and via the reeling nip onto the parent roll 20B under reeling.

(9) In FIG. 1C the reel-up is shown in a situation when the finished parent roll 20A has been unloaded from the support of the loading arms 16, 17 of the secondary reeling position and of the carriage 18. The rotation of the parent roll has been stopped by a breaking device or by the center drive of the secondary reeling position. The carriage 18 has been moved to pick-up the parent roll 20B under reeling from the primary reeling position. The loading arms 12, 13 have been moved to their horizontal position and the reel spool 15B and the parent roll 20B under reeling have been changed to support of the loading arms 16, 17 and the carriage 18. The reel spool 15B and thus also the parent roll 20B under reeling are moved to the secondary reeling position. Also the reeling cylinder 10 is moved to form the reeling nip N with the parent roll 20B under reeling to the secondary reeling position. The fiber web W is guided by the guide roll 11 onto the reeling cylinder 10 and onto the parent roll 20B under reeling.

(10) In FIG. 1D the reel-up is shown in a situation when the reeling of the fiber web W is continued in the secondary reeling position. The reel spool 15B and the parent roll under reeling 20B are in support of the loading arms 16, 17 and the carriage 18. The reel spool 15B and the parent roll under reeling 20B are rotated by the center drive of the secondary reeling position and moved by the carriage 18 as the reeling progresses. A new, empty reel spool 15C is brought to the primary reeling position for beginning of the reeling of the next parent roll. In FIG. 2 the reel-up is shown in a view from above. The reel spool 15B and the parent roll 20A are supported at each axial end on the guides 14. The reeling cylinder 10 is located below the guides 14. The loading arms 12, 13 of the primary reeling position are located in this case inside the guides and the loading arms 16, 17 and the carriages 18 are located outside the guides 14.