[0001] The invention relates to the handling of web rolls, particularly to the handling
of web rolls in connection with slitter-winders of fibre-web machines, such as in
connection with slitter-winders of paper and board machines, and more particularly
to the handling of partial web rolls i.e. customer rolls. The invention relates to
an arrangement in the handling of web rolls according to the preamble of claim 1.
[0002] It is known that paper is manufactured in machines which together constitute a paper-manufacturing
line which can be hundreds of metres 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 metres.
[0003] 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 metres 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. This periodicity
is tend to be done with efficiency as good as possible in order not to waste already
done work.
[0004] The parent roll web 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. Of
prior art are known different types of slitter-winders, in carrier-roll slitter-winders
the web roll is wound supported by two carrier rolls and in multistation winders the
web roll is wound supported of its centre.
[0005] 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 web rolls i.e. the so-called
set is removed from the machine. 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 winding of a new parent roll.
[0006] It is known of prior art that attaching a tail of the web roll i.e. a tail part of
the web remaining on the surface of the wound web roll can be performed by applying
adhesive or tape. As known of prior art, the adhesive or tape can be attached in the
travel direction or cross direction of the web.
[0007] It is known of prior art to arrange into connection with the slitter-winder a separate
tail-attaching station by means of which the tail of the web roll is attached on the
surface of the web roll. However, such a tail-attaching station is heavy of its apparatus
requiring a rotating station of the web roll with its rolls, receiving means of the
web roll and removing means of the web roll. Furthermore, the station requires a separate
movable beam where the taping or adhesion device is attached. Additionally, a frame
structure of the beam is required.
[0008] The object of the invention is to provide a novel arrangement in the handling of
web rolls in which the above-described problems and disadvantages have been eliminated
or at least minimised.
[0009] A particular object of the invention is to create an arrangement in the handling
of web rolls, particularly partial web rolls, in connection with slitter-winders of
fibre-web machines where, in connection with the slitter-winder, no separate tail-attaching
station is required.
[0010] To achieve the above objects and those which come out later, the arrangement according
to the invention is mainly characterised by what is presented in the characterising
part of claim 1.
[0011] In an advantageous embodiment of the arrangement according to the invention, a web
roll completed on a slitter-winder is pushed from carrier rolls of the slitter-winder
onto a transfer surface of the arrangement which is located such that the transfer
surface is in an inclined position descending from a plane of the substantial upper
surface of the carrier rolls of the slitter-winder towards a plane formed by the floor
surface of the machine hall. Above the transfer surface is arranged a receiving beam
for receiving the web roll. The receiving beam comprises rotating rolls or a sliding
surface on which the web roll supports itself when contacting the receiving beam.
The receiving beam comprises transfer means and an actuator, by which the position
of the web roll is descended on the transfer surface controllably downwards such that
the web tail of the web roll is at a desired point for attaching the end. Into connection
with the receiving beam are also arranged tail-attaching means by which the tail is
attached on the surface of the web roll. When the web roll is in a desired position
for tail attachment, the attachment of the tail is performed by the tail-attaching
means which attach the tail with an adhesive material, such as glue or tape, in the
machine or cross direction. When performing the tail attachment in the cross direction,
the web roll is stopped by the receiving beam. When performing the tail attachment
in the machine direction, there is no need to stop the web roll. When the tail has
been attached to the web roll, the receiving beam is transferred away from the web
roll in the machine direction or the vertical direction and the web roll transfers
along the transfer surface e.g. to a roll receiver or on the floor, from where the
web roll is typically transferred onto a conveyor. The receiving beam can also transfer
downwards parallel with the transfer surface supporting the web roll to accompany
it to a receiver i.e. a tipper or on the floor or so far as the conveyor.
[0012] According to an advantageous embodiment of the arrangement according to the invention,
the web roll is then pushed from the carrier rolls of the slitter-winder onto a table
having a downward slope. The web roll is received by the receiving beam which has
rotating rolls or a sliding surface. On the receiver, the web roll is descended controllably
downwards until the web end i.e. the tail end is at a desired point. Then, the web
roll is stopped and the tail attachment is performed with an adhesive material, such
as tape or glue, in the machine and/or cross direction. The tail-attaching means are
attached to the receiving beam above or below it. When the tail has been attached
to the web roll, the receiving beam is transferred away from the web roll in the machine
direction or the vertical direction.
[0013] According to an advantageous additional characteristic of the invention, to control
the operation of the tail-attaching means is arranged the identification of the web
tail end. The identification can be based on calculation or it can be detected e.g.
by an observation device based on computer vision or e.g. by photoelectric sensors.
[0014] According to an advantageous additional characteristic of the arrangement according
to the invention, the receiving beam of the arrangement has been supported from its
both ends being cross-directional in relation to the machine direction on end structures
which e.g. move along rails or equivalents arranged on the machine hall floor. The
motion of the end structures can be mechanically or programmatically synchronised.
[0015] Advantageously in the arrangement according to the invention, the receiving beam
is provided with a damping device to damp the contact impact of the web roll. The
damping device is e.g. a damper arranged into connection with the end structures.
[0016] The arrangement according to the invention is simple and reliable in operation enabling
the tail attachment of the web roll quickly and smoothly.
[0017] The arrangement according to the invention is applicable in connection with various
fibre-web slitter-winders. In this description, the arrangement according to the invention
is described in connection with the so-called carrier-roll slitter-winder, in which
carrier-roll slitter-winder, the web roll is wound supported by two carrier rolls.
The invention is also applicable for use in such slitter-winders where one carrier
roll is replaced by a set of belt rolls which consists of e.g. a rotating, endless
belt arranged around two belt rolls. Furthermore, the invention is also applicable
in connection with the so-called multistation winders where the web roll is wound
by rotating means located in the centre of the web roll.
[0018] Even though this description mainly refers to paper, the invention is also applicable
in connection with the manufacture of other fibre webs.
[0019] On the slitter-winder, several web rolls are typically completed from one set which
are endwise successively in the longitudinal direction and, naturally, the arrangement
according to the invention can attach the tails of the web rolls of the whole set.
The receiving beam extends advantageously in the cross-machine direction substantially
for the longitudinal travel of the whole set in the same way as the rolls supporting
the web roll. There can be several tail-attaching devices in the longitudinal direction
of the set such that one tail-attaching device attaches the tail of at least one web
roll or they can be transversing, whereby the tail-attaching device comprises a control
arrangement to direct the application of the adhesive material always at the point
of each web roll. The tail-attaching device can also extend in the longitudinal area
of the whole set adding the adhesive material for attaching all tails of the web rolls
of the set substantially simultaneously.
[0020] Next, the invention will be described in more detail with reference to the figure
of the enclosed drawing, to the details of which the invention is, however, intended
by no means to be narrowly limited.
Fig. 1 schematically shows an advantageous embodiment of the invention.
Fig. 2 schematically shows another advantageous embodiment of the invention.
Figs. 3A-3C schematically show some possibilities in attaching the web end.
[0021] In the schematical exemplifying embodiment shown in Fig. 1, a web roll 10 has just
been completed on a slitter-winder. The slitter-winder comprises two carrier rolls
11, 12 supported on which the web roll 10 has been wound. The web roll 10 is pushed
away from the support of the carrier rolls 11, 12 by a pusher 14. The pusher 14 pushes
the web roll onto a transfer surface 20 which is in an inclined position descending
from a plane of the upper surface of the carrier rolls 11, 12 of the slitter-winder
downwards towards a plane of the machine hall floor. An inclination angle A is 0.1-45
degrees, advantageously 0.5-30 degrees. On the transfer surface 20, the web roll 10
is arranged to contact a receiving beam 21 which comprises rolls 22 for enabling the
rotation of the web roll 10 and supporting the web roll 10. The web roll 10 is transferred
supported by the receiving beam 21 and the conveyor rolls 22 on the transfer surface
20 downwards until a tail of the web roll 10 is at an attaching point in a correct
position in relation to tail-attaching means 24. The tail-attaching means 24 comprise
elements for transferring an adhesive material, such as tape or glue, to the tail
of the web roll 10 for attaching it on the surface of the web roll 10. The tail-attaching
means 24 are arranged into connection with the receiving beam 21. When the tail of
the web roll 10 has been attached on the surface of the web roll 10, the receiving
beam 21 and the rolls 22 and the tail-attaching means 24 connected to it are transferred
away from the web roll 10 in the machine direction or the vertical direction and the
web roll 10 transfers to a roll receiver 15 which transfers the web roll 10 typically
onto a conveyor (not shown in the figures).
[0022] As seen from Fig. 1, an advantageous embodiment of the invention for the arrangement
in the handling of web rolls comprises the transfer surface 20 which is inclined descending
from the slitter-winder towards the main plane of the machine hall floor 13. The arrangement
further comprises the receiving beam 21, which includes the rolls 22 and into connection
with which are arranged the tail-attaching means 24. In the embodiment of Fig. 1,
the tail-attaching means 24 are located above the receiving beam 21. Additionally
in the embodiment of Fig. 1, the arrangement is provided with a safety beam 26 by
which it is further ensured that the web roll 10 remains in place on the transfer
surface 20. The safety beam 26 is advantageously arranged to operate together with
the receiving beam 21.
[0023] In the schematical exemplifying embodiment shown in Fig. 2, a web roll 10 has just
been completed on a slitter-winder. The slitter-winder comprises two carrier rolls
11, 12 supported on which the web roll 10 has been wound. The web roll 10 is pushed
away from the support of the carrier rolls 11, 12 by a pusher 14. The pusher 14 pushes
the web roll onto a transfer surface 10 which is in an inclined position descending
from a plane of the upper surface of the carrier rolls 11, 12 of the slitter-winder
downwards towards a plane of the machine hall floor. An inclination angle A is 0.1-45
degrees, advantageously 0.5-30 degrees. On the transfer surface 20, the web roll 10
is arranged to contact a receiving beam 21 which comprises a sliding surface 25 for
enabling the rotation of the web roll 10 and supporting the web roll 10. The web roll
10 is transferred supported by the receiving beam 21 and conveyor rolls 22 on the
transfer surface 20 downwards until a tail of the web roll 10 is at an attaching point
in a correct position in relation to tail-attaching means 24. The tail-attaching means
24 comprise elements for transferring an adhesive material, such as tape or glue,
to the tail of the web roll 10 for attaching it on the surface of the web roll 10.
The tail-attaching means 24 are arranged into connection with the receiving beam 21.
When the tail of the web roll 10 has been attached on the surface of the web roll
10, the receiving beam 21 and the rolls 22 and the tail-attaching means 24 connected
to it are transferred away from the web roll 10 in the machine direction or the vertical
direction and the web roll 10 transfers to a floor 13 typically onto a conveyor (not
shown in the figures) on the floor 13.
[0024] As seen from Fig. 2, an advantageous embodiment of the invention for the arrangement
in the handling of web rolls comprises the transfer surface 20 which is inclined descending
from the slitter-winder towards the main plane of the machine hall floor 13. The arrangement
further comprises the receiving beam 21, which includes the sliding surface 25 and
into connection with which are arranged the tail-attaching means 24. In the embodiment
of Fig. 2, the tail-attaching means 24 are located below the receiving beam 24.
[0025] Characteristics shown in Figs. 1 and 2 are not limited to apply only to the embodiment
in question but the characteristics of one embodiment can naturally be used in another
embodiment, e.g. the rolls 22 and the sliding surface 25 are possible in both embodiments
as alternatives as well as it is possible to arrange the safety beam 26 to the embodiment
according to Fig. 1.
[0026] Figs. 3A-3B schematically show some possibilities in attaching the tail end of the
web. In the example shown in Fig. 3A, a tail 30 of the web roll 10 is attached with
an adhesive material 27, e.g. tape, positioned in the machine direction, whereby the
tape 27 extends from the upper surface of the tail 30 to the surface of the web roll
10. In this case, the tail-attaching means 24 are located advantageously above the
receiving beam 21. There can be one or several of the tapes 27 in parallel. Fig. 3B
shows a possibility of positioning the adhesive material 27 in the cross direction
for attaching the tail 30 of the web roll 10 by the tail-attaching means 24 below
the receiving beam 21. Then, the tail 30 is allowed to open and descend onto the transfer
surface 20. The adhesive material 27 is added on the surface of the web roll 10 in
the area of the tail 30 and, as the web roll 10 rotates, the tail is attached with
the adhesive material 27, e.g. glue or tape, on the surface of the web roll 10 in
a nip between the web roll 10 and the transfer surface 20. Fig. 3C shows an example
where the adhesive material 27 is added, when the web tail 30 has been opened e.g.
by blowings, on the surface of the web roll 10 in the area of the tail in the cross
direction by the tail-attaching means 24 above the receiving beam 21. The tail 30
is attached as the web roll 10 rotates e.g. in a nip between the rolls 22 or the sliding
surface 25 of the receiving beam 21 and the web roll 10.
[0027] The invention was described above referring to only one of its advantageous exemplifying
embodiments, to the details of which the invention is not intended to be narrowly
limited but many modifications and variations are possible within the scope of the
idea according to the invention.
List of reference numbers
[0028]
- 10
- web roll
- 11
- carrier roll
- 12
- carrier roll
- 13
- floor
- 14
- pusher
- 15
- receiver
- 20
- transfer surface
- 21
- receiving beam
- 22
- rolls
- 24
- tail-attaching means
- 25
- sliding surface
- 26
- safety beam
- 27
- adhesive material
- 30
- web tail i.e. web end
[0029] An inclination angle of transfer surface
1. An arrangement in the handling of web rolls, particularly in the handling of partial
web rolls (10) in connection with slitter-winders of fibre-web machines, such as paper
and board machines, for attaching a tail of the web roll (10), characterised in that the arrangement comprises a transfer surface (20) which is inclined descending from
the slitter-winder towards a plane of the floor level of the machine hall, a receiving
beam (21) arranged above the transfer surface (20) into connection with which are
arranged tail-attaching means (24) and into connection with the receiving beam (21)
arranged rolls (22) or a sliding surface on which the web roll supports itself when
contacting the receiving beam.
2. An arrangement according to claim 1, characterised in that the receiving beam (21) is arranged transferable for stopping the web roll (10) at
a desired point to attach the tail of the web roll (10).
3. An arrangement according to claim 1, characterised in that the arrangement comprises means for transferring the receiving beam in the machine
and/or vertical direction.
4. An arrangement according to claim 1, characterised in that the arrangement comprises means for positioning the tail-attachment means (24) at
a desired point for attaching the tail of the web roll.
5. An arrangement according to claim 1, characterised in that the arrangement comprises several tail-attaching means (24) which are located in
parallel into connection with the receiving beam (21) in the cross-machine direction.
6. An arrangement according to claim 1, characterised in that the tail-attaching means (24) are arranged transferable in the cross direction in
the receiving beam (21).
7. An arrangement according to claim 1, characterised in that an inclination angle (A) of the transfer surface (20) is 0.1-45 degrees.
8. An arrangement according to claim 1, characterised in that the tail-attaching means (24) are arranged to apply the adhesive material in the
machine or cross direction for attaching the tail on the surface of the web roll (10).
9. An arrangement according to claim 1, characterised in that, in the arrangement for attaching a tail (30) of the web roll (10) in the cross direction
by the tail-attaching means (24) below the receiving beam (21), the tail (30) of the
web roll (10) is arranged openable gravitationally such that the tail (30) is arranged
to descend onto the transfer surface (20) and that the tail-attaching means (24) are
arranged to add an adhesive material (27) on the surface of the web roll (10) in the
area of the tail (30) and that, as the web roll (10) rotates, the tail (30) is arranged
to attach on the surface of the web roll (10) in a nip between the web roll (10) and
the transfer surface (20).
10. An arrangement according to claim 1, characterised in that the arrangement comprises the transfer surface (20) which is arranged to receive
the web roll (10) completed on the slitter-winder and which is located such that the
transfer surface (20) is in an inclined position descending from a plane of the substantial
upper surface of the carrier rolls of the slitter-winder towards a plane formed by
the floor level of the machine hall, that in the arrangement above or below the transfer
surface (20) is arranged the receiving beam (21) for receiving the web roll (10),
that the receiving beam (21) comprises rotating rolls (22) or a sliding surface (25)
on which the web roll (10) is arranged to support on when contacting the receiving
beam (21), that the receiving beam (21) comprises transfer means and an actuator by
which the position of the web roll (10) is descended on the transfer surface (20)
controllably downwards such that the web tail of the web roll (10) is at a desired
point for attaching the end by the tail-attaching means (24), that as the tail is
attached to the web roll (10) the receiving beam (21) is arranged transferable away
from the web roll (10) in the machine direction or the vertical direction as the web
roll (10) transfers along the transfer surface (20).