EP2669223A1

EP2669223A1 - Method for winding fiber webs and device in a winder for winding fiber webs, especially for partial paper and board webs

Info

Publication number: EP2669223A1
Application number: EP12169769.2A
Authority: EP
Inventors: Pekka Eronen; Jaakko Haapanen
Original assignee: Metso Paper Oy
Current assignee: Valmet Technologies Oy
Priority date: 2012-05-29
Filing date: 2012-05-29
Publication date: 2013-12-04
Anticipated expiration: 2032-05-29
Also published as: EP2669223B1

Abstract

The invention relates to a method for winding of partial webs, in which method the partial webs are wound around cores (31; 31 L", 31 R") to partial web rolls (35L, 35R) as set in winding stations by a nip between a winding roll and the partial web roll being formed in a multistation type winder, which comprises one or two winding rolls (35L, 35R) and arrangement for feeding cores (31; 31 L, 31 R; 31 L', 31 R') into the winder. In the method the cores (31; 31 L, 31 R; 31 L', 31 R') for one set are moved into the winder in pairs (31 L, 31 R; 31 L', 31 R') by a core pusher (21) that pushes two adjacent cores (31 L, 31 R; 31 L', 31 R') into the winder simultaneously and that the cores (31 L, 31 R; 31 L', 31 R') are positioned one at time to a location for pick up to the winding stations and that in the method in case of uneven number of cores (31; 31 L, 31 R; 31 L', 31 R') needed for winding a set of partial web rolls (35L, 35R) one core is moved and located at time. The invention also relates to a device in a winder for winding of partial webs in a multistation type winder, which comprises one or two winding rolls on which winding stations are provided for winding the partial webs around cores (31; 31 L", 31 R") to partial web rolls (35L, 35R) as set in the winding stations by a nip between the winding roll and the partial web roll being formed, which device comprises an arrangement for feeding cores (31; 31 L, 31 R; 31 L', 31 R') into the winder. The arrangement comprises a core pusher (21) for pushing one or two adjacent cores (31 L, 31 R) at time into the winder and for locating the cores (31 L, 31 R) in the winder to be picked up to the winding stations on the winding rolls.

Description

The invention relates to a method for winding fiber webs, particularly for winding longitudinally slitted paper and board webs into partial web rolls, in which method the partial web rolls are wound in winding stations for winding partial web rolls by a nip between a winding roll and the partial web roll being formed.
The invention also relates to a device in a winder for winding fiber webs, particularly for winding longitudinally slitted paper and board webs into partial web rolls, in which device comprises winding stations for winding the partial web rolls, which winding stations are formed in connection with a winding roll.
It is known that a fiber web, e.g. paper, is manufactured in machines which together constitute a paper-manufacturing line which can be hundreds of meters long. Modern paper machines can produce over 450,000 tons of paper per year. The speed of the paper machine can exceed 2,000 m/min and the width of the paper web can be more than 11 meters.
In paper-manufacturing lines, the manufacture of paper takes place as a continuous process. A paper web completing in the paper machine is reeled by a reel-up around a reeling shaft i.e. a reel spool into a parent roll the diameter of which can be more than 5 meters and the weight more than 160 tons. The purpose of reeling is to modify the paper web manufactured as planar to a more easily processable form. On the reel-up located in the main machine line, the continuous process of the paper machine breaks for the first time and shifts into periodic operation.
The web of parent roll produced in paper manufacture is full-width and even more than 100 km long so it must be slit into partial webs with suitable width and length for the customers of the paper mill and wound around cores into so-called customer rolls before delivering them from the paper mill. This slitting and winding up of the web takes place as known in an appropriate separate machine i.e. a slitter-winder.
On the slitter-winder, the parent roll is unwound, the wide web is slit on the slitting section into several narrower partial webs which are wound up on the winding section around winding cores, such as spools, into customer rolls. When the customer rolls are completed, the slitter-winder is stopped and the wound rolls i.e. the so-called set is removed from the machine and new cores for new partial web rolls are to be transferred to winding stations for winding a new set of partial web rolls. Then, the process is continued with the winding of a new set. These steps are repeated periodically until paper runs out of the parent roll, whereby a parent roll change is performed and the operation starts again as the unwinding of a new parent roll.
Slitter-winders employ winding devices of different types depending on, inter alia, on the type of the fiber web being wound. On slitter-winders of the multistation winder type, the web is guided from the unwinding via guide rolls to the slitting section where the web is slit into partial webs which are further guided to the winding roll/rolls on the winding stations into customer rolls to be wound up onto cores. Adjacent partial webs are wound up on different sides of the winding roll / on different winding rolls. Multistation winders have one to three winding rolls and in them each partial web is wound to a partial web roll in winding stations around cores that have been fed into the winder and often moved to the winding station by using different kinds of gripping means, which usually require complicated structures and actuators for achieving movements and positioning means for each winding station. During winding a winding nip is formed between the winding roll and the partial web roll to be wound.
In EP patent publication 0258533 is disclosed a prior art arrangement for introducing a winding tube (a winding core) into a winding machine with at least one supporting roller (a winding roll), at least two adjustable winding frames, with mutually opposed spindles receiving the winding tube, and with at least one winding tube gripper pivotable transversely relative to the axis of the supporting roller between a winding tube receiving position and a winding tube delivery position. The prior art arrangement also comprises a tube trough for transferring the tubes into the winding machine which is arranged respectively above a supporting roller in the region of the winding tube receiving position of the winding tube gripper. The winding tubes are fed into the winding machine in one line along the tube trough. One disadvantage in this kind of arrangement is that the tubes have tendency to adhere to each other at their ends, which causes separating problems in picking up by the grippers.
An object of the invention is to create a device and a method for winding fiber webs where the problems relating to feeding cores into the winder have been eliminated or at least minimized.
An object of the invention is to create a new device and a new method for a winder for winding fiber webs relating to feeding cores into the winder.
An object of the invention is to provide a device in a winder and a method for winding fiber webs where the feeding of cores into the winder is reliable and fast.
To achieve the above-mentioned objects and those which come out later, the method according to the invention is mainly characterized by what is presented in the characterizing part of claim 1. The device according to the invention is mainly characterized by what is presented in the characterizing part of claim 6. Advantageous features are defined in depending claims.
According to the invention in the method for winding of partial webs the partial webs are wound as set into partial web rolls in a multistation type winder which comprises one or two winding rolls, in the method the cores are fed into the winder in pairs by a core pusher that pushes two adjacent cores in to the winder simultaneously and positions stepwise the cores to correct locations in the winder to be picked up to the winding stations on the winding rolls. In case an uneven number of cores is needed for a set of partial web rolls the core pusher may push and locate only one core at time.
According to an advantageous aspect of the invention in the method first two adjacent cores are fed into the winder by the core pusher and one core is positioned for a winding station at one of the two winding rolls, the core pusher moves backwards and is reduced for one core only and the core pusher moves in the feed direction and positions the other core for a winding station on the other of the two winding rolls, the core pusher is reduced for return to be ready for transfer of the next two cores.
According to the invention the device in a winder for winding of partial webs in a multistation type winder, which comprises one or two winding rolls and an arrangement for feeding cores with a core pusher for pushing two adjacent cores into the winder simultaneously and for stepwise positioning the cores in the winder to be transferred to the winding stations on the winding rolls.
According to an advantageous feature of the invention a core storage and batching means for moving the cores from the core storage in to position for the core pusher feeding are located outside of the winder such that the cores for the winding stations at each of the two winding roll are loadable at same location.
According to advantageous aspects of the invention the cores are pushed into the winder by only one pusher pushing two adjacent cores simultaneously into the winder, which makes the arrangement cost effective and simple. The cores are transferred to the winder such that at the end of the feeding the cores for the set are in the winder for picking up to the winding stations in two adjacent rows at correct locations in respect of the winding stations.
To summarize the invention in the method and the arrangement for feeding cores into the winder the cores are fed into the winder in two rows, or lines by the core pusher and the cores to be fed next will be located for feeding during the feeding of the previous cores from the core storage and thus all cores for a set can be moved to correct locations for winding stations during the winding of the previous set of partial web rolls. The reducers reduce the core pusher for pushing one core only such that the other's location is not disturbed and also reduce the core pusher for movement back for next cores such that the cores waiting to be fed will not be dislocated.
By the invention a new device and a new method for a winder for winding fiber webs relating to feeding cores into the winder is achieved in which as a result the cores are in line at correct locations for winding stations.
Next, the invention will be described in more detail with reference to the figures of the enclosed drawing, to the details of which the invention is intended by no means to be narrowly limited.

Figures 1 - 8 schematically show an advantageous example of the invention in a winder with two winding rolls.
Figure 9 schematically shows a side view of a winder with two winding rolls with an advantageous example of the invention.

In the figures same reference signs are used for corresponding parts and part combinations unless otherwise mentioned.
In figure 1 is shown beginning stage of feeding new cores 31 into a winder. The area outside the winder is indicated by arrow 11 and the area inside the winder is indicated by arrow 10. Storage for new cores 31, for example a core table 30 is located next to transfer guides 24L, 24R, which are located adjacent to each other such that the adjacent cores located on them are not in contact. The transfer guide 24L is for a winding station at one of the winding rolls of the winder and the other transfer guide 24R is for a winding station at the other of the winding rolls of the winder. In connection with the core table 30 a core batching device 34 or corresponding means for batching and moving the cores from the core table 30, for example a robot, is provided for moving cores 31 onto the transfer guides 24L, 24R. In the figure 1 two cores 31L, 31R has been moved from the core table 30 by the core batching device 34 onto the transfer guides 24L, 24R. The core 31L is for a winding station at one of the winding rolls of the winder and the other core 31R if for a winding station at the other of the winding rolls of the winder. A core pusher 21 is in waiting location in the expander 20, which has means 27 for expanding the core pusher 21, i.e. the pusher 21, to pushing state, in which the pusher shoulders 21L, 21R are in opened position. In this example the means 27 for expanding the core pusher 21 consists of a V-shaped slot in the expander 20, which also serves as a stopper for the return movement back to waiting position for the pusher 21. Inside the winder area, indicted by arrow 10, are located at least two pairs of pusher reducers 22L, 22R and 23L, 23R pairwise on each side of the transfer guides 24L, 24R during winding of the previous set of partial web rolls. Different pairs of reducers are used depending on the positioning need of the cores.
In figure 2 further during winding of the previous set of partial web rolls the pusher 21 is pushing two adjacent cores 31L, 31R into the winder simultaneously on the transfer guides 24L, 24R and such that ends of the cores 31L, 31R are supported against the shoulders 25L, 25R of the pusher 25.
In figure 3 the pusher 21 has pushed the cores 31L, 31R along the transfer guides 24L, 24R to the location of the first core 31L for picking up to the winding station.
In figure 4 after pushing the first core 31L to the picking up position the pusher 21 has backed up to the location of the pusher reducers 23L, 23R and the pusher reducer 23L on the side of the already located first core 31L is opened to the reducing position such that the reducer actuator 26L is activated. The reducer actuators 26L, 26R consists of actuators, for example pneumatic or hydraulic cylinders. In the reducing position the reducer actuator 26L of the pusher reducer 23L extends crosswise over the transfer guide 24L on its side such that by moving the pusher 21 in return movement the reducer actuator 26L pushes the shoulder 25L into reduced and withdrawn position, in which the shoulder 25L will not contact the end of the core 31L on its side and the pusher 21 can be moved past the core 31L without contacting it and without dislocating it.
In figure 5 the pusher 21 pushes the other core 31R into correct position for picking up to the winding station and the end of the core 31R is supported against the shoulder 25R on the transfer guide 24R.
In figure 6 two cores 31L, 31R have been fed to correct location for picking up to winding stations and the pusher reducers 23L, 23R at both sides of the pusher 21 have been opened to reducing position such that the reducer actuators 26L, 26R of the pusher reducer 23L, 23R extend crosswise over both transfer guides 24L, 24R such that while moving the pusher 21 in return movement the reducer actuator 26R pushes also the shoulder 25R into reduced and withdrawn position so that the pusher 21 can be moved in between the cores 31L', 31R' on the transfer guides 24L, 24R back to waiting position against the expander 20. The two cores 31L', 31R' to be fed into the winder and to be located at correct position for picking up to the winding station has been moved from the core table 30 by the core batching device 34 onto the transfer guides 24L, 24R during feeding and locating the previous cores 31L, 31R.
In figure 7 the pusher 21 is returned to the waiting position in between the cores 31L', 31R' on the transfer guides 24L, 24R against the expander 20. The next two cores 31L', 31R' are waiting on the transfer guides 24L, 24R to be fed into the winder and to be located at correct position for picking up to the winding station.
In figure 8 the pusher 21 has returned to the waiting position against the expander 20 and the expanding means 27 has opened the shoulders 25L, 25R of the pusher 21 for pushing the next two cores 31L, 31R to correct positions into winder to be picked up to winding stations.
In figure 9 is shown a winder for winding of partial webs in to partial web rolls 36L, 26R around cores 31L", 31R". The winder is a multistation type winder which comprises two winding rolls 35L, 35R on which the winding stations are arranged successively alternating on each winding roll 35L, 35R. Transfer guides 24L, 24R along which cores 31L, 31R are pushed by the pusher 21 into the winder are located in the space between the winding stations.
As shown in the figures in the method the cores 31 are transferred in to the winder in pairs 31L, 31R by the pusher 21 that pushes two adjacent cores 31L, 31R in to the winder simultaneously and positions stepwise the cores 31L,31R in the winder to be transferred to the winding stations on the winding rolls. In the method first two adjacent cores 31L, 31R are fed in to the winder by the core pusher 21 and one core 31L is positioned for a winding station at one of the two winding rolls, the core pusher 21 moves backwards and is reduced by reducer actuator 26L of the reducer 23L for one core only by reducing one of its shoulders 25L and the core pusher 21 with one shoulder 25L reduced moves in the feed direction and positions the other core 31R for a winding station on the other of the two winding rolls, the other shoulder 25R of the core pusher 21 is reduced by the reducer actuator 26R of the other core reducer during movement backwards for return to for feeding of the next two cores 31L', 31R'. While the pusher 21 is locating the cores 31L, 31R in the winder the next cores 31L', 31R' are moved from the core table 30 onto the transfer guides 24L, 24R by the batching device 34 and thus the cores 31L', 31R' are ready to be fed into to winder as the core pusher 21 is returned. This sequence is repeated during winding of the previous set of partial web rolls 36L, 36R as many times needed for all cores for the winding of the next set of partial web rolls are in correct locations on the transfer guides 24L, 24R in the winder for pick-up to the winding stations. Cores are fed in pairs, i.e. two at the time unless an uneven number of cores is needed for winding a set of partial web rolls. In that case the pusher may move only one core at time. The cores 31L, 31R are transferred to the winder such that at the end phase of the feeding the cores 31L, 31R are in the winder for transfer to the winding stations in two adjacent rows at correct locations.
Above the invention has been described referring to one advantageous example only by this is not meant to limit the invention to this example but many alterations and modifications are possible in various components of the invention.

Claims

Method for winding of partial webs, in which method the partial webs are wound around cores (31; 31L", 31R") to partial web rolls (35L, 35R) as set in winding stations by a nip between a winding roll and the partial web roll being formed in a multistation type winder, which comprises one or two winding rolls (35L, 35R) and arrangement for feeding cores (31; 31L, 31R; 31L', 31R') into the winder, characterized in, that in the method the cores (31; 31L, 31R; 31L', 31R') for one set are moved into the winder in pairs (31L, 31R; 31L', 31R') by a core pusher (21) that pushes two adjacent cores (31L, 31R; 31L', 31R') into the winder simultaneously and that the cores (31L, 31R; 31L', 31R') are positioned one at time to a location for pick up to the winding stations and that in the method in case of uneven number of cores (31; 31L, 31R; 31L', 31R') needed for winding a set of partial web rolls (35L, 35R) one core is moved and located at time.
Method according to claim 1, characterized in, that in the method one core (31L; 31L') of a pair of two adjacent cores (31L, 31R; 31L', 31R') is located in the winder at time.
Method according to claim 1, characterized in, that in the method a pair of cores (31L', 31R') is moved for feeding into the winder while the previous pair of cores (31L, 31R) is moved into and located in the winder to correct positions for pick up to the winding stations.
Method according to claim 1, characterized in, that in the method at first two adjacent cores (31L.31R) are fed into the winder by the core pusher (21) and one core (31L) is located in correct position for pick up to the respective winding station at one of the two winding rolls (35L), the core pusher (21) moves backwards and is reduced for moving the one not in correct position located core (31R) and the core pusher (21) moves and locates the other core (31R) for the respective winding station on the other (35R) of the two winding rolls, the core pusher (21) is reduced and returned between the next two cores and expanded for transfer of the next two cores (31L', 31R').
Method according to claim 1, characterized in, that in the method the cores (31; 31L, 31R; 31L', 31R') for one set are transferred to the winder such that at the end of the feeding the cores (31) are in the winder for pick up to the winding stations in two adjacent rows at correct locations in respect of the winding stations.
Device in a winder for winding of partial webs in a multistation type winder, which comprises one or two winding rolls on which winding stations are provided for winding the partial webs around cores (31; 31L", 31R") to partial web rolls (35L, 35R) as set in the winding stations by a nip between the winding roll and the partial web roll being formed, which device comprises an arrangement for feeding cores (31; 31L, 31R; 31L', 31R') into the winder, characterized in, that the arrangement comprises a core pusher (21) for pushing one or two adjacent cores (31L, 31R) at time into the winder and for locating the cores (31L, 31R) in the winder to be picked up to the winding stations on the winding rolls.
Device according to claim 6, characterized in, that the arrangement comprises two transfer guides (24L, 24R), which are located adjacent to each other such that the adjacent cores (31L, 31R; 31I', 31R') located on them are not in contact.
Device according to claim 7, characterized in, that the in arrangement one transfer guide (24L) is for a winding stations at one of the winding rolls (35L) of the winder and the other transfer guide (24R) is for a winding stations at the other (35R) of the winding rolls.
Device according to claim 6, characterized in, that the arrangement comprises a core storage (30) for cores (31) to be fed to the winder and a batching means (34) for moving the cores (31) onto the transfer guides (24L,24R).
Device according to claim 6, characterized in, that the arrangement comprises reducers (22L, 22R; 23L, 23R) adjacent to the transfer guides (24R, 24R) for reducing the core pusher (21) for pushing one core (31R) only and for reducing the core pusher (21) to be movable in between two adjacent cores (31L', 31R').
Device according to claim 6, characterized in, that the arrangement comprises an expander (20) for expanding the reduced core pusher (21) for pushing two cores at time.