U.S. patent application number 10/466004 was filed with the patent office on 2004-03-11 for method for changing a reel in a reel-up and a tape for use in the method.
Invention is credited to Enwald, Petri, Kojo, Teppo.
Application Number | 20040046080 10/466004 |
Document ID | / |
Family ID | 8560221 |
Filed Date | 2004-03-11 |
United States Patent
Application |
20040046080 |
Kind Code |
A1 |
Enwald, Petri ; et
al. |
March 11, 2004 |
Method for changing a reel in a reel-up and a tape for use in the
method
Abstract
In the method for changing a reel in the reel-up of a paper or
paperboard machine or finishing apparatus for paper or paperboard,
the cutting of a paper or paperboard web (W) and the guiding of the
same on a new reel is conducted by using a tape (5) that is guided
into connection with a reeling core (3). Thereafter the tape, as it
is positioned on top of the reeling core, at the same time cuts the
web (W) and guides the new end of the web following the cutting
point around the reeling core. The tape (5) is equipped with an
adhesive agent which at the moment of reel change or thereafter is
brought to a state that activates the adhesive agent. At least some
of the adhesion surfaces of the tape (5) are activated by means of
a compression pressure between the reeling core (3) and the reeling
cylinder (2).
Inventors: |
Enwald, Petri; (Tuusula,
FI) ; Kojo, Teppo; (Mantsala, FI) |
Correspondence
Address: |
COHEN, PONTANI, LIEBERMAN & PAVANE
551 FIFTH AVENUE
SUITE 1210
NEW YORK
NY
10176
US
|
Family ID: |
8560221 |
Appl. No.: |
10/466004 |
Filed: |
July 9, 2003 |
PCT Filed: |
February 5, 2002 |
PCT NO: |
PCT/FI02/00083 |
Current U.S.
Class: |
242/523.1 ;
242/526; 242/532.3 |
Current CPC
Class: |
B65H 19/262 20130101;
B65H 19/28 20130101; B65H 2408/236 20130101 |
Class at
Publication: |
242/523.1 ;
242/526; 242/532.3 |
International
Class: |
B65H 019/28; B65H
019/26 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 5, 2001 |
FI |
20010203 |
Claims
1. A method for changing a reel in a reel-up of a paper or
paperboard machine or finishing apparatus for paper or paperboard,
in which method the cutting of a paper or paperboard web (W) and
the guiding of the same on a new reel is conducted by using a tape
(5) that is guided into connection with a reeling core (3),
whereafter the tape, as it is positioned on top of the reeling
core, at the same time cuts the web (W) and guides the new end of
the web following the cutting point around the reeling core,
characterized in that the tape (5) is equipped with an adhesive
agent, which at the moment of reel change or after the same is
brought into a state that activates the adhesive agent.
2. The method according to claim 1, characterized in that at least
part of the adhesion surfaces of the tape (5) is activated by means
of a compression pressure between the reeling core (3) and the
reeling cylinder (2).
3. The method according to claim 1, characterized in that at least
part of the adhesion surfaces of the tape (5) is activated by means
of radiation exerted on the tape, such as heat radiation or UV
radiation.
4. The method according to claim 1, characterized in that at least
part of the adhesion surfaces of the tape (5) is activated by means
of moisture exerted on the tape.
5. The method according to any of the preceding claims,
characterized in that in the method a tape (5) is used, both sides
of which are at least partly treated with an adhesive agent, such
as glue or adhesive tape which is activated, i.e. becomes adherent
only as a result of an activation process exerted on the tape.
6. The method according to any of the preceding claims,
characterized in that in the method a reeling core (3) is used that
contains an inner part (3a) surrounded by a removable,
advantageously disposable outer layer (3b), such as a cardboard
sleeve.
7. A tape used in the cutting of a paper or paperboard web and in
reel change, characterized in that both sides of the tape (5) are
at least partly treated with an adhesive agent that is activated to
an adherent state as a result of an activation process exerted on
the tape.
8. The tape according to claim 7, characterized in that the
adhesive agent consists of pressure-sensitive glue or adhesive
tape, which is activated when the pressure exerted on the adhesive
agent exceeds a threshold pressure of the adhesive agent.
9. The tape according to claim 8, characterized in that the
threshold pressure of the adhesive agent is advantageously over 1
Mpa.
10. The tape according to claim 7, characterized in that the
adhesive agent is sensitive to the heat radiation or UV radiation
exerted thereon.
11. The tape according to claim 7, characterized in that the
adhesive agent is sensitive to moisture exerted thereon.
12. The tape according to any of the claims 7 to 11, characterized
in that the adhesive agent on the surface of the tape has an
activation delay that determines the time passed from the
activating action exerted on the tape to the activation of the
adhesive agent.
13. The tape according to claim 12, characterized in that the
activation delay is typically at least 0.01 seconds, preferably
0.01 to 0.25 seconds.
Description
[0001] The invention relates to a method disclosed in the preambles
of the appended independent claims for changing a reel in a reel-up
of a paper or paperboard machine or finishing apparatus of paper or
paperboard, especially in a continuous reel-up without reducing the
running speed of the web, as well as to a tape used in the
method.
[0002] In the reel-up of a paper machine, in a so-called pope
reel-up or in a centre drive assisted pope reel-up, finished paper
is reeled around a reeling core, such as a reel spool after the
calender. The reeling itself is conducted in such a manner that the
reeling core is loaded against the reeling cylinder via which the
web to be reeled travels, winding around the reeling core and
forming a complete reel.
[0003] This section of the paper machine should also function
without interruptions and receive the continuous paper web coming
from the preceding sections of the paper machine. Thus, when the
old reel has become full, it is necessary to cut the web and start
winding the web following the cutting point around a new reeling
core. In practice, this takes place in such a manner that when the
paper reel has become full, a new empty reeling core, i.e. for
example a reel spool is transferred in contact with the paper web
on the surface of the reeling cylinder, whereafter the paper web is
cut by means of a suitable method and the end of the web following
the cutting point is guided on the periphery of an empty reeling
core, on which the new reel now starts to accumulate.
[0004] The most critical phases of the reeling are, in fact, the
cutting of the paper web and the act of bringing the new end of the
web around the empty reeling core. To avoid unnecessary broke, the
change must take place without problems. In an ideal situation the
new end of the web is brought immediately neatly against the
peripheral surface of the empty core, such as the reel spool. It is
well known that many methods are used for the cutting and change,
depending on the basis weight of the web to be reeled.
[0005] A generally used change method is pocket change which is
suitable for all grades, but which typically causes quite a large
amount of bottom broke and may cause harmful impacts in the
reel-up. Another method is a so-called gooseneck change in which
the above-mentioned problems do not occur, but it is suitable only
for thin grades. A third method is a tape change, and the present
invention relates to a change method in accordance therewith. In
the tape change the cutting of the web and guiding of the same onto
a new reel are typically conducted by using a tape which is guided
into the nip between the reeling core and the reeling cylinder in
the vicinity of the ends of the reeling core and the reeling
cylinder, whereafter the tape, as it winds spirally over the width
of the reeling core, at the same time cuts the web diagonally and
guides the new end following the cutting point of the web around
the reeling core.
[0006] The devices used in tape change are disclosed for example in
patent publication GB 1 135 945, U.S. Pat. No. 4,711,404 and
Finnish published application 74679. In the devices disclosed in
these publications the end of the tape that is equipped with an
adhesive layer is pushed between the reel spool and the reeling
cylinder by means of a suitable tool, and the tape adheres on the
surface of the reel spool by means of glue.
[0007] At present, the speeds of paper machines are generally 20
m/s or higher, and the aim is, of course, to attain even higher
speeds. The cutting of a rapidly travelling web is not a problem as
such, and forces caused by the speed can even be utilized in the
cutting. The critical point is to bring the end of the new web
immediately against the peripheral surface of the reel spool, so
that it follows the peripheral surface at high peripheral speed,
and to prevent the uncontrolled wandering of the end of the web and
incorrect positioning of the same on the reel spool. This problem
becomes worse when the basis weight is increased.
[0008] Furthermore, unlike in reeling conducted by means of slitter
winders, on a continuously operating reel-up the end of the web is
not glued to the reeling core before reeling begins, as is the case
in reeling conducted by means of slitter winders, because when
using known methods the glueing would require that the machine is
stopped. In slitter winders glueing is utilized, because when a
disposable core is used as a winding core, it is possible that in
the course of time slippage will occur between the bottom layers of
the reel and the core. The above-mentioned slippage may result for
example from changes in the humidity of air, whereby the diameter
of the core becomes smaller faster than the diameter of the web
wound thereon, wherein the bottom of the roll becomes slack. A
slipping bottom impairs or even prevents the unwinding process of
the roll, wherein the roll has to be rejected.
[0009] It is an aim of the method according to the present
invention to eliminate or at least reduce the problems caused by
the above-mentioned state of the art, and to present a method for
changing a reel in a reel-up of a paper machine at full running
speed and a tape used in the method, by means of which the new end
of the reel is glued immediately. To attain this purpose among
other things, the method and the tape according to the invention
are primarily characterized in what will be presented in the
characterizing parts of the appended independent claims.
[0010] Advantageously, in the method according to the invention,
the adhesive agent in the tape is brought to a state that activates
the adhesive agent at the moment of reel change or thereafter. In
this context the term adhesive agent refers to an agent that can be
activated to an adherent state and that is located on both surfaces
of the tape as a sectional or continuous adhesion surface.
[0011] According to a preferred embodiment of the invention, the
activation of the adhesion surfaces is conducted by means of a
compressive pressure between the reeling core and the reeling
cylinder. According to one embodiment at least part of the adhesion
surfaces of the tape is activated by means of radiation exerted on
the tape, such as heat radiation or UV radiation. Furthermore,
according to one embodiment at least part of the adhesion surfaces
of the tape are activated by means of moisture exerted on the tape.
The activation of the adhesion surfaces can also be conducted by
means of another chemical or physical phenomenon. The way in which
the adhesion surfaces are activated is determined according to the
properties of the adhesive agent that is being used.
[0012] When the adhesive agent on the tape is activated only at the
moment of reel change, the handling and transfer of the tape to the
nip becomes easier, because the adhesive agent is dry and resistant
to the handling. The adhesive agent is not activated for example
when the tape is coiled up, but only in set, precisely determined
conditions.
[0013] In a preferred method according to the invention a tape is
used, both sides of which are at least partly treated with an
adhesive agent, such as glue or adhesive tape, which is activated
i.e. becomes adherent only after an activation exerted on the tape.
The adhesive agent on both sides of the tape glues the bottom
layers of the web reeled on a reeling core against each other,
wherein the bottom of the reel becomes tight.
[0014] In the tape according to the invention both sides of the
tape are at least partly treated with an adhesive agent that is
activatable to an adherent state as a result of activation exerted
on the tape.
[0015] According to a preferred embodiment of the invention, the
adhesive agent consists of pressure-sensitive glue or adhesive
tape, which is activated when the pressure exerted on the adhesive
agent exceeds a threshold pressure of the adhesive agent. In an
advantageous embodiment, the threshold pressure of the adhesive
agent is over 1 Mpa.
[0016] According to second embodiment of the invention, the
adhesive agent is sensitive to heat radiation or UV radiation
exerted thereon. According to a third embodiment of the invention,
the adhesive agent is sensitive to moisture exerted thereon.
[0017] According to a preferred embodiment of the invention, the
adhesive agent on the surface of the tape has an activation delay
that determines the time passed from the activating action to the
activation of the adhesive agent. As a result of the activation
delay, the tape is not glued on the surface of the reeling
cylinder, but the adhering effect only begins inside the reel.
[0018] In an embodiment according to the invention, the activation
delay is typically at least 0.01 seconds, and advantageously 0.01
to 0.25 seconds.
[0019] In the following, the invention will be described in more
detail with reference to the appended drawing, in which
[0020] FIG. 1 shows a reel-up of a paper or paperboard machine in
which the method and tape according to the invention are used,
[0021] FIG. 2 shows a part of the longitudinal cross-section of the
tape according to the invention, and
[0022] FIG. 3 illustrates the activation of the tape and a
preferred structure of the reeling core.
[0023] FIG. 1 shows schematically a reel-up of a paper machine,
which is based on a so-called pope reel-up. The reel-up
continuously forms paper reels from a full-width web W coming from
a paper machine or finishing apparatus for paper, of which paper
reels one that has become full is marked with the letter R in the
drawing. The reel-up shown in the drawing comprises a reeling
cylinder 2 rotating in a support 1. The web W winds via the reeling
cylinder around the actual reel R. Above the reeling cylinder there
is a reel spool functioning as a reeling core 3 for the new paper
reel. The reel-up also comprises a conveying profile 4 for guiding
the tape 5 used in the cutting of the web into the space between
the reeling cylinder 2 and the above-mentioned reeling core 3. In
the drawing, this space is marked with the reference numeral 6. The
reel-up is advantageously centre drive assisted, in other words in
addition to the reeling cylinder, the reeling core 3 is also
equipped with a drive (not shown). The change is conducted at the
running speed.
[0024] The tape 5 is fed along the conveying profile 4 with a
feeding mechanism 7, which typically contains a feeding device that
rations the tape from a storage reel to the conveying profile 4,
and a cutter of the tape that cuts the tape 5 into the right length
after the web has been cut. The above-mentioned devices belong to
prior art, and therefore they are not described in more detail.
[0025] FIG. 2 schematically shows the structure of the tape 5
according to the invention. On both surfaces of the core 8 of the
tape there are adhesion surfaces 9, which have been produced by
treating the core 8 with a pressure-sensitive glue used as an
adhesive agent, which is activated i.e. becomes adherent only after
a predetermined threshold pressure is exceeded. The adhesion
surfaces 9 may be continuous over the entire length of the tape, or
there may be sectional adhesion surfaces 9 on the surface of the
tape.
[0026] In the method according to the invention, the
above-described reel-up is used in the following manner: When
preparations are being made for the cutting of the web W, a
suitable amount of tape 5 is fed along the conveying profile 4 by
means of the feeding mechanism 7 to the space between the reeling
cylinder 2 and the reeling core 3 which is open at this stage, i.e.
to the nip 6 in the vicinity of the end of the reeling core. To
fasten the end of the tape on the surface of the reeling core 3
outside the web, there may be a device at the final end of the
conveying profile that spreads an instantly adherent glue on the
end of the tape, as disclosed for example in the publication U.S.
Pat. No. 4,711,404. Alternatively, a piece of adherent material may
be arranged at the end of the tape 5, said material being capable
of engaging mechanically with the end of the reeling core 3, and
for this purpose, the end of the reeling core 3 can comprise a
special zone of the adherent material, with which the piece of
adherent material arranged at the end of the tape 5 can engage in
the manner shown in the publication EP 350133. The cutting of the
web begins in such a manner that the reeling core 3 that previously
has been accelerated to the peripheral speed (for example by means
of a drive located in a primary reeling device 10) corresponding to
that of the reeling cylinder 2 are lowered down in contact with the
web W on top of the reeling cylinder 2, at which moment the nip 6
is closed. The devices for accelerating and guiding the reeling
core are generally known, and therefore they are not described in
more detail herein.
[0027] When the nip 6 is closed, the end of the tape 5 remains
between the reeling core 3 and the reeling cylinder 2, and the end
of the tape 5 adheres to the surface of the reeling core 3. As a
result of the rotating movement of the reeling core, the tape 5 is
wound around this reeling core and tightens, wherein it, starting
at its free end, disengages from the conveying profile 4 and
tightens between the nip 6 and the feeding mechanism 7, cutting the
web W in two by a stroke, winds spirally over the width of the
reeling core, and guides the end of the web following the cutting
point to the reeling core 3. During the above-described stages the
tape travels through the nip 6. Subsequent layers of the new reel
are positioned on top of the tape around the core 3.
[0028] At the same time when the tape 5 travels through the nip 6,
the pressure sensitive glue contained in the adhesion surfaces and
used as the adhesive agent is activated and it glues the bottom
layers formed of the web W on the reel to each other, wherein the
bottom becomes tight. The production of the activation pressure is
enhanced by the fact that the pressure exerted on the tape itself
in the nip is higher than the average pressure produced in the
linear load of the nip as a result of the increased thickness
caused by the tape. The delay in the activation of the glue is such
that the tape 5 is not glued on the surface of the reeling cylinder
2, but the adhering effect only begins inside the reel that is
being produced, when the tape is already covered by the paper
placed on top of the core.
[0029] The purpose is not to restrict the invention solely to the
embodiment described above, but it can be modified within the scope
of the inventive idea presented by the claims. The adhesion
surfaces 9 of the tape according to the invention can also be
produced by means of a substance other than glue, such as adhesive
tape, or the like. The adhesion surfaces 9 can also be made of a
material that can be activated in some other way. The substance
used as an adhesion surface can also be activated by means of heat
radiation or UV radiation or moisture, or by means of another
chemical or physical phenomenon exerted thereon. In this case, the
reel-up used in the method comprises the necessary auxiliary parts
such as for example moisteners and heat radiators for the
activation of the tape. Such a moistener, radiator or another
activation device can be arranged for example in the primary
reeling device 10 supporting the ends of the reeling core in the
change position, and the activation process can be synchronized
precisely in accordance with the moment of change. The tape 5 can
also comprise other surfaces than the ones mentioned above, and it
can also be produced in such a manner that the core 8 is made of a
material that can be activated, wherein a surface to be added on
top of the core 8 is not necessary.
[0030] FIG. 3 shows a side view of a situation in which the tape 5
is wound around the reeling core 3. The device that exerts an
activating process on the tape 5 in a contactless manner is marked
with the reference numeral 11. The device 11 is directed towards
the surface of the reeling core 3 in such a manner that is exerts
for example a water jet, UV radiation or heat radiation on the
tape. It is possible that the process is capable of affecting the
tape even if the tape were already covered by the paper coming to
the new reel. By means of these ways of activation, the adhesive
agent on the tape can also be activated within a fixed delay, but
this is not necessary, if the tape can no longer enter in direct
contact with the reeling cylinder 2 after the activating process.
In the drawing, the reeling core 3 consists of two parts. The inner
part 3a of the same consists of a reel spool that is utilized in
reel-ups and that can be used several times, the end of which is
equipped with a connecting element to couple the same to an
external drive motor to rotate the reel spool and the reel. The
outer part of the reeling core, i.e. the surface layer 3b, is
composed of a sleeve that is fitted around the reel spool, which,
being disposable, can be drawn out of the reel spool and replaced
by pushing a new sleeve in its place. This sleeve can be made of
paperboard, for example. Thus, the invention is especially well
suited to cases in which the reeling core 3 contains a disposable
surface layer 3b according to FIG. 3, but, in principle, it can be
applied in all reeling cores around which paper or paperboard web
is accumulated to form a reel.
[0031] Furthermore, in the description hereinabove, less attention
is paid to other accessory devices of the terminal end of a paper
or paperboard machine, such as the transfer devices of the full
reel and the transfer devices of the new reeling core, because
these devices are accessory devices independent of the invention,
and solutions generally known in the field can be used as such
devices.
* * * * *