U.S. patent application number 11/428499 was filed with the patent office on 2007-02-01 for method in a belt reeler and a belt reeler.
Invention is credited to Matti Kemppainen, Teppo Kojo, Risto Makinen, Ilkka Naatti, Vesa Riihela, Marko Tiilikainen, Jari Tiitta, Topi Tynkkynen.
Application Number | 20070023561 11/428499 |
Document ID | / |
Family ID | 34803266 |
Filed Date | 2007-02-01 |
United States Patent
Application |
20070023561 |
Kind Code |
A1 |
Kemppainen; Matti ; et
al. |
February 1, 2007 |
Method in a Belt Reeler and a Belt Reeler
Abstract
A belt reeler has a reeling nip (7) formed by a reeling core (6)
or a growing machine reel (4) and at least one endless supporting
member (3) traveling at least via a first wire guiding roll (1),
and a second wire guiding roll (2). Several parameters of the belt
reeler are adjusted simultaneously to adjust the reeling process,
of which parameters at least the first parameter and the second
parameter are one of the following: web tension (P1), wire tension
(P2), distance of the machine reel from the wire turning roll (P3),
depression of the wire/machine reel (P4), surface draw (P5, P5',
P5''), and peripheral force (P6).
Inventors: |
Kemppainen; Matti; (Jokela,
FI) ; Tiitta; Jari; (Kellokoski, FI) ;
Riihela; Vesa; (Halkia, FI) ; Tynkkynen; Topi;
(Vantaa, FI) ; Kojo; Teppo; (Mantsala, FI)
; Makinen; Risto; (Mantsala, FI) ; Tiilikainen;
Marko; (Kellokoski, FI) ; Naatti; Ilkka;
(Helsinki, FI) |
Correspondence
Address: |
STIENNON & STIENNON
612 W. MAIN ST., SUITE 201
P.O. BOX 1667
MADISON
WI
53701-1667
US
|
Family ID: |
34803266 |
Appl. No.: |
11/428499 |
Filed: |
July 3, 2006 |
Current U.S.
Class: |
242/532.3 ;
242/541.3 |
Current CPC
Class: |
B65H 19/22 20130101;
B65H 18/22 20130101; B65H 19/2253 20130101; B65H 2408/236
20130101 |
Class at
Publication: |
242/532.3 ;
242/541.3 |
International
Class: |
B65H 18/22 20070101
B65H018/22; B65H 19/28 20060101 B65H019/28 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 8, 2005 |
FI |
20055397 |
Claims
1. A method in a belt reeler in which a reeling nip is formed by a
reeling core or a growing machine reel and at least one endless
supporting member traveling at least via a first wire guiding roll
and a second wire guiding roll, wherein several parameters are
determined and adjusted simultaneously to adjust the reeling
process, of which parameters at least the first parameter and the
second parameter are one of the following: web tension, wire
tension, distance of the machine reel from the wire turning roll,
depression of the wire/machine reel, surface draw, peripheral
force.
2. The method according to claim 1, wherein the parameter is
determined by means of measurements or calculations.
3. The method according to claim 1, wherein the belt reeler is
formed of a center-driven reeler by replacing its reeling cylinder
with a first wire guiding roll and adding at least a second wire
guiding roll, and an endless supporting member.
4. The method according to claim 1, wherein the belt reeler is
arranged in a reeling apparatus comprising at least two stationary
reeling stations to form a machine reel.
5. The method according to claim 4, wherein the first wire guiding
roll and the second wire guiding roll are arranged to move in
relation to the reeling stations.
6. The method according to claim 1, wherein the area of the reeling
core outside the paper web and/or the wire is provided with an
adhesive element against which a section of the paper web is guided
when changing the reeling core.
7. A belt reeler in which a reeling nip is formed by a reeling core
or a growing machine reel and at least one endless supporting
member arranged to travel at least via a first wire guiding roll
and a second wire guiding roll, wherein the belt reeler comprises
at least means for determining and adjusting several parameters
simultaneously to adjust the reeling process, of which parameters
at least the first parameter and the second parameter are one of
the following: web tension, wire tension, distance of the machine
reel from the wire turning roll, depression of the wire/machine
reel, surface draw, peripheral force.
8. The belt reeler according to claim 7, wherein the belt reeler is
formed of a center-driven reeler by replacing its reeling cylinder
with a first wire guiding roll and adding at least a second wire
guiding roll, and an endless supporting member.
9. The belt reeler according to claim 7, wherein the belt reeler is
located in a reeling apparatus comprising at least two stationary
reeling stations to form a machine reel.
10. The belt reeler according to claim 9, wherein the first wire
guiding roll and the second wire guiding roll are arranged to move
in relation to the reeling stations.
11. A method for rebuilding a center-driven reeler, said reeler
comprising at least a reeling cylinder, wherein the center-driven
reeler is formed into a belt reeler by replacing its reeling
cylinder with a first wire guiding roll and adding at least a
second wire guiding roll, and an endless supporting member.
12. A reeling apparatus comprising at least a belt reeler in which
a reeling nip is formed by a reeling core or a growing machine reel
and at least one endless supporting member arranged to travel at
least via a first wire guiding roll and a second wire guiding roll,
wherein the belt reeler comprises at least two stationary reeling
stations to form a machine reel.
13. The belt reeler according to claim 12, wherein the first wire
guiding roll and the second wire guiding roll are arranged to move
in relation to the reeling stations.
14. A reel change method to be used in a belt reeler in which a
reeling nip is formed by a reeling core or a growing machine reel
and at least one endless supporting member travelling at least via
a first wire guiding roll and a second wire guiding roll, wherein
the reeling core is provided with an adhesive element located in
such an area in the reeling core which at least in the beginning of
the reeling process remains outside the reeling nip, to which
adhesive element a section of the paper web is guided when changing
the reeling core.
15. The method according to claim 14, wherein the adhesive element
is located at the end of the reeling core.
16. The method according to claim 14, wherein the adhesive element
is formed by spraying of glue or by means of an adhesive tape.
Description
CROSS REFERENCES TO RELATED APPLICATIONS
[0001] This application claims priority on Finnish Application No.
20055397, Filed Jul. 8, 2005, the disclosure of which is
incorporated by reference herein.
STATEMENT AS TO RIGHTS TO INVENTIONS MADE UNDER FEDERALLY SPONSORED
RESEARCH AND DEVELOPMENT
[0002] Not applicable.
BACKGROUND OF THE INVENTION
[0003] The invention relates to a method for controlling a belt
reeler. The invention also relates to a belt reeler. In addition,
the invention relates to a method for rebuilding a center-driven
reeler, and a reeling apparatus, as well as a reel change
method.
[0004] In the final end of a machine manufacturing paper,
paperboard, soft tissue or the like or a finishing apparatus for
paper, paperboard or soft tissue or the like, a paper web which is
typically several meters wide and which has been produced and/or
treated in the preceding machine sections, is reeled around a
reeling core, i.e. a reel spool to form a machine reel. In this
reeling up process a reeling cylinder that is bearing-mounted
rotatable is typically used for guiding the paper web on the
machine reel, wherein the nip contact between the reeling cylinder
and the machine reel is utilized to influence the quality of the
reel produced thereby. The ends of the reel spool are affected by
means of a suitable loading mechanism to adjust the nip contact
between the machine reel that is being formed and the reeling
cylinder. Such reeling concepts and loading methods related thereto
are disclosed, for example, in the Finnish patent 91383 and in the
corresponding U.S. Pat. No. 5,251,835, as well as in the Finnish
patent application 950274 and in the corresponding U.S. Pat. No.
5,690,298.
SUMMARY OF THE INVENTION
[0005] The main purpose of the present invention is to disclose a
method that enables the formation of different kinds of reels with
a belt reeler.
[0006] To attain this purpose, the method according to the
invention is primarily characterized in that in the method several
parameters are determined and adjusted simultaneously to adjust the
reeling process, of which parameters at least the first parameter
and the second parameter are one of the following: web tension,
wire tension, distance of the machine reel from the wire turning
roll, depression of the wire/machine reel, surface draw, and
peripheral force. The belt reeler according to the invention, in
turn, is primarily characterized in that the belt reeler comprises
at least means for determining and adjusting several parameters
simultaneously to adjust the reeling process, of which parameters
at least the first parameter and the second parameter are one of
the following: web tension, wire tension, distance of the machine
reel from the wire turning roll, depression of the wire/machine
reel, surface draw, peripheral force. The method according to the
invention for rebuilding a reeler is primarily characterized in
that the center-driven reeler is formed into a belt reeler by
replacing its reeling cylinder with a first wire guiding roll and
adding at least a second wire guiding roll, and an endless
supporting member. The reeling apparatus according to the invention
is primarily characterized in that the reeling apparatus comprises
at least a belt reeler in which a reeling nip is formed by a
reeling core or a growing machine reel and at least one endless
supporting member arranged to travel at least via a first wire
guiding roll and a second wire guiding roll, and the belt reeler
comprises at least two stationary reeling stations to form a
machine reel. The reel change method according to the invention is
primarily characterized in that a reeling nip is formed by a
reeling core or a growing machine reel and at least one endless
supporting member traveling at least via a first wire guiding roll
and a second wire guiding roll, wherein the reeling core is
provided with an adhesive element located in such an area in the
reeling core which at least in the beginning of the reeling process
remains outside the reeling nip, to which adhesive element a
section of the paper web is guided when changing the reeling
core.
[0007] Herein, a method is disclosed to be utilized in a belt
reeler in which a reeling nip is formed by a reeling core or a
growing machine reel and at least one endless supporting member
traveling at least via a first wire guiding roll, and a second wire
guiding roll. In the method several parameters are adjusted
simultaneously to adjust the reeling process, of which parameters
at least the first parameter and the second parameter are one of
the following: web tension, wire tension, distance of the machine
reel from the wire turning roll, depression of the wire/machine
reel, surface draw, peripheral force. It is also possible that
several, such as three, four, five or six of the parameters are
those listed above. In some embodiments a parameter is determined
by means of measurements or calculations.
[0008] Correspondingly, a belt reeler in which a reeling nip is
formed by a reeling core or a growing machine reel and at least one
endless supporting member arranged to travel at least via a first
wire guiding roll and a second wire guiding roll, comprises at
least means for determining and adjusting several parameters
simultaneously to adjust the reeling process, of which parameters
at least the first parameter and the second parameter are one of
the following: web tension, wire tension, distance of the machine
reel from the wire turning roll, depression of the wire/machine
reel, surface draw, peripheral force.
[0009] In one embodiment the belt reeler is formed of a
center-driven reeler by replacing its reeling cylinder with a first
wire guiding roll and adding at least a second wire guiding roll
and an endless supporting member. In this context, the term center
drive refers to a driving means arranged in one or both ends of the
shaft of a growing machine reel, especially to an electric drive
typically equipped with a gearbox. With the concept center-driven
reeler reference is made to a reeler known from the state of the
art, in which the reeling core and the growing machine reel are
equipped with a center drive.
[0010] In one embodiment the belt reeler is arranged in a reeling
apparatus comprising at least two stationary reeling stations to
form a machine reel. In a preferred embodiment the first wire
guiding roll and the second wire guiding roll are arranged to move
in relation to the reeling stations.
[0011] In an embodiment, the area of the reeling core outside the
paper web is provided with an adhesive element against which a
section of the paper web is guided when changing the reeling
core.
[0012] The center-driven reeler which comprises at least a reeling
cylinder, can be rebuilt into a belt reeler in such a manner that
the reeling cylinder is replaced with a first wire guiding roll and
at least a second wire guiding roll and an endless supporting
member are provided therein. It is also possible to use an old
reeling cylinder or a part/parts thereof, such as roll mantle,
bearings, electric drive, etc. as a first wire guiding roll. If
necessary, it is possible to modify the surface of the reeling
cylinder, for example by lathing or grinding, so that it becomes
suitable as a wire guiding roll.
[0013] The reeling apparatus, in turn, can be formed in such a
manner that it comprises at least a belt reeler, in which the
reeling nip is formed of a reeling core or a growing machine reel
and at least one endless supporting member that is arranged to
travel through at least the first wire guiding roll and the second
wire guiding roll. Furthermore, the reeling apparatus comprises at
least two stationary reeling stations to form a machine reel.
Advantageously, the first wire guiding roll and the second wire
guiding roll of the reeling core are arranged to move in relation
to the reeling stations.
[0014] The reel change method, in turn, is characterized in that
the method is intended to be used in a belt reeler in which a
reeling nip is formed by a reeling core or a growing machine reel
and at least one endless supporting member traveling at least via a
first wire guiding roll, and a second wire guiding roll. In the
method, the area of the reeling core outside the paper web and/or
the wire is provided with an adhesive element against which a
section of the paper web is guided when changing the reeling
core.
[0015] One basic idea of the invention is to use a wire reeler or a
belt reeler as a reeler, the function of which is guided by
adjusting several different parameters as a function of the
diameter of the machine reel and/or the web speed and the paper
grade that is being run. In the description the term belt reeler is
used, said term referring both to a belt reeler and to a wire
reeler. Correspondingly, the term wire is used to refer both to the
belt and to the wire.
[0016] The reeling process of the belt reeler can be adjusted, thus
forming machine reels of desired kind. The factors affecting the
reeling include for example web tension, wire tension, distance of
the machine reel from the wire turning roll, depression of the
wire/machine reel, surface draw and peripheral force. Preferably,
parameters are adjusted as a function of the diameter of the
machine reel and/or the web speed and the paper grade that is being
run. Advantageously, several parameters are adjusted
simultaneously, such as two, three, four, five or six
aforementioned parameters. In addition to the aforementioned
parameters, it is also possible to adjust other parameters.
[0017] The web tension is utilized to affect the tension of the
machine reel structure. The web tension is typically generated
primarily by means of a center drive. The contribution of the
center drive in generating the web tension is advantageously
greater than that of the wire turning roll in use, so that a
sufficiently tight machine reel can be formed. The wire turning
roll and/or the wire can also decelerate the speed in certain
cases, wherein the entire web tension is drawn with the torque of
the center drive.
[0018] By means of the wire tension it is, in turn, possible to
affect the force transmitted between the wire and the surface of
the machine reel to the machine reel. When the wire tension is
increased, the force transmitted via the nip to the machine reel is
also increased, if other reeling parameters are kept constant. The
tension of the wire is adjusted by means of actuators. The tension
of the wire is typically in the order of approximately 15 to 35
kN/m, depending on the force required. The level of the force
required is affected by several factors, such as paper grade, web
speed, etc. When a stronger/less flexible belt or for example even
a metal wire or a belt is utilized, the wire tension can, of
course, be greater than the above-mentioned typical value.
[0019] The distance of the machine reel from the wire turning roll
affects the length of the nip formed by the wire and the surface of
the machine reel with constant depression. If the machine reel is
located close to the wire turning roll, the nip becomes longer as
the wire rises on the surface of the turning roll in a sharper
angle. If the aim is to keep the length of the nip constant, the
depression must be decreased when the machine reel is located close
to the wire turning roll.
[0020] The depression of the wire/machine reel affects the surface
area between the wire and the machine reel, via which the nip force
is transmitted to the machine reel. When the depression increases,
the surface area of the nip affecting the machine reel is
increased, and the force effective per unit area, i.e. the nip
pressure is even decreased. However, the total force effective
through the nip is increased.
[0021] By means of surface draw it is possible to affect the
tightness of the machine reel to be reeled. The surface draw is
attained by producing torque differences, for example by
decelerating the wire by means of the drive of the wire turning
roll. The sum of the peripheral force and the torque of the wire
turning roll approximately equals the web tension (naturally
reeling friction and other losses affect the equation). It is also
possible to perform the surface draw/deceleration by means of a
separate roll or a wire.
[0022] By means of the above-described control solutions it is
possible to attain various significant advantages when compared to
solutions of prior art. Depending on the embodiment, it is possible
to attain for example one or several of the following advantages.
[0023] when the nip control of the belt reeler is implemented as
presented above, either the actual pressure exerted by the wire on
the reel or the parameter "equivalent linear load" comparable to
the conventional linear load is adjusted [0024] the actual wire
pressure against the machine reel or the "equivalent linear load"
is adjusted by affecting the actual variables correlating with the
primary function of the wire, i.e. removal of air from the machine
reel [0025] when the torques of the drives and the deflection of
the wire are taken into account in the calculation, the actual wire
tension affecting the surface pressure/"equivalent linear load" is
adjusted [0026] to control the wrap angle, it is possible to use
two complementary control variables (deflection of the wire and
distance of the reel from the first belt/wire guiding roll [0027]
in addition to the magnitude of the nip force it is also possible
to affect its orientation
[0028] The belt reeler whose function can be controlled, if
necessary, by adjusting several different parameters as a function
of the diameter of the machine reel and/or the web speed and the
paper grade that is being run, can be implemented in various ways.
In one embodiment the belt reeler is formed of a so-called pope
reeler. The term pope reeler refers to a known reel-up of prior art
in which the reeling core and the growing machine reel are not
equipped with a center drive, but the rotating torque is
transmitted to the reel from the rotating movement of the reeling
cylinder via the reeling nip. The pope reeler is supplemented with
a wire and a press roll equipped with a drive. The control of the
wire loop is easier with a longer wire loop, because of which it is
advantageous to use several rolls via which the wire loop
circulates. In said manner it is advantageously possible to form a
belt reeler with a moving reeling nip and a stationary secondary
reeling station.
[0029] By means of such a reeler it is possible to form a so-called
semi-hard nip (i.e. a nip comprising both a wire nip and a roll
nip) for the duration of the entire reeling process. The wire nip
enables removal of air, which is an advantageous feature especially
at high speeds. The hard nip, in turn, is utilized to affect the
hardness of the reel.
[0030] The reeler also enables fully supported web transfer to the
reeler and easy tail threading. The solution has an advantageous
effect on the overall structure, because it enables an advantageous
positioning of the pulper and a low structure of the storage.
[0031] As to the modifications made in the reeler, the final way of
implementing the belt reeler is substantially dependent on the
original reeler. For example an existing reel-up equipped with a
center drive can be formed into a belt reeler by using their
reeling cylinder as a wire guiding roll, advantageously as a
turning roll. In addition, a second wire guiding roll and possibly
other wire guiding rolls, as well as one or several press rolls are
required.
[0032] In one embodiment two stationary reeling frames are arranged
for the reel spools. Between the reeling frames travels a
supporting member loop that forms a reeling nip and helps in taking
the web from one reeling frame to another. The loop of the
supporting member moves along with the diameter and adjusts the
reeling nips according to the situation. The change is conducted by
means of waterjet cutting change device, or the like. In addition
to this, pick-up i.e. lifting devices, such as goosenecks may be
required after each reeling frame, to bring the cut web again on a
new reel spool. After the first reeling frame, a holding blow
and/or a suction box may be required in the area of the tail cut by
means of waterjet to prevent the tail from rising on the reel
spool.
[0033] By means of such a reeler solution equipped with a
stationary reeling frame it is possible to attain several
advantages. Depending on the embodiment, it is possible to attain
for example one or several of the following advantages. [0034]
possible to implement with simple structures, such as storage
frames, wherein the structure is cheap and durable [0035] storage
with actuators not necessary [0036] structurally more economical to
couple a stationary drive, when compared to a movable drive [0037]
no drive change with possible problems in the middle of the reel
[0038] no linear load change with possible problems in the middle
of the reel [0039] possible press, change and other corresponding
equipment easier to implement/add, as it is not necessary for them
to move along with the reeling device [0040] steady, does not
vibrate [0041] endures process disturbances and forces/strikes
resulting therefrom [0042] second redundant station may produce
full reels in one frame while the other is being serviced,
reliability improves [0043] expandability, one embodiment can be
supplemented with storages for empty reel spools, etc. [0044]
stoppage times are shortened, because it is not always necessary to
remove the reel spool from the machine and in case of lack of spool
it is possible to bring the reel spool directly to the reeling
frame faster [0045] transverse oscillation is easily accomplished
in the machine direction in stationary stations
[0046] The supporting member loop of the belt reeler, in turn, can
be utilized to attain for example one or several of the following
advantages, depending on the embodiment [0047] controlled transfer
of a full-width web to a reeling station possible [0048] much
easier to move the supporting member loop than the heavier machine
reel [0049] accurate force measurement of the tension adjustment of
the supporting member loop, [0050] facilitates the transfer of
broke to the pulper and cleaning in a web break
[0051] One embodiment, in turn, makes it possible to place reeling
frames in two layers, wherein it is possible to attain some of the
following advantages: [0052] low construction on the machine level,
fits in a lower hall, no problems when operating with a crane
[0053] easier to attain a safer reeler [0054] same floor opening
can be used as a lift hole which is usually present in a mill,
[0055] the construction of the pulper is better/less expensive, low
structure, no long ramps, less need for water
[0056] The belt reeler and its control method can be used in
various ways. In a change method a new reel spool is provided with
an adhesive element on the area remaining outside the wire, such as
a double-sided adhesive tape, glue, etc. In a normal reeling
situation the amount which the paper web is detached from the reel
spool in the area outside the edge of the wire and from the
adhesive surface of the reel spool corresponds to the thickness of
the wire. The change is conducted for example by cutting a tail
from a full-width web at the location of the adhesive element, for
example from one edge of the web or from the middle. The tail cut
by means of waterjet is deflected towards the reel spool for
example by means of a movable member located after the nip, or by
means of a deflection element fed in said point in the nip, wherein
the tail touches the adhesive area and is attached thereto. The
deflection element also enables the cutting of a wedge instead of a
tail.
[0057] One change embodiment can also be utilized in conventional
reelers. In the embodiment, an adhesive tape or a corresponding
structure is installed in the area of a new reel spool outside the
paper web. The cutting of a tail from the edge of the web starts at
the same time when the nip is closed. For example an adhesive tape
activated under pressure is activated when the nip is closed,
whereafter the narrow tail is deflected in the lateral direction to
the area of the adhesive area, wherein it adheres to the adhesive
tape. The adherence of the tail to the adhesive tape is followed by
spreading. The method is especially suitable for slow paperboard
machines, wherein when the adhesive surface that is thinner than
the thick paperboard web to be reeled is located outside the edge
of the web in the reel spool, the adhesive surface does not touch
the reeling cylinder when the nip is closed, but when the cut tail
or the entire web is transferred transversely at the location of
the adhesive surface, it touches the adhesive agent. By means of
this change method, it is possible to eliminate for example the
slackness at the bottom.
[0058] In the following, the invention will be described in more
detail with reference to the appended principle drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0059] FIGS. 1 and 2 show a belt reeler and some of its
parameters.
[0060] FIGS. 3 to 6 show in side views a belt reeler solution
formed of a so-called pope reeler.
[0061] FIGS. 7 to 9 show side views of a belt reeler solution
formed of a center-driven reeler of prior art, in which the reeling
cylinder has been stationary.
[0062] FIGS. 10 to 12 show side views of another belt reeler
solution formed of another kind of center-driven reeler of prior
art, in which the reeling cylinder has originally been movable in
the horizontal direction.
[0063] FIGS. 13 to 20 show side views of embodiments of belt
reelers equipped with two reeling frames.
[0064] FIG. 21 shows a belt reeler from above.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0065] For the sake of clarity, the figures only show the details
necessary for understanding the invention. The structures and
details that are not necessary for understanding the invention, but
are obvious for anyone skilled in the art, have been omitted from
the figures in order to emphasize the characteristics of the
invention.
[0066] FIG. 1 shows in principle the structure of a belt reeler and
a wire reeler. The reeler comprises at least a first wire guiding
roll 1 and a second wire guiding roll 2. Through the wire guiding
rolls 1, 2 travels an endless supporting member loop 3, which in
the example is a wire or a belt. The reeler may also comprise
larger number of rolls than the two rolls 1, 2 shown in the Figure.
One or several rolls (so-called turning rolls) are rotated with a
drive, which is advantageously adjustable. The solution according
to FIG. 2 also comprises a wire guiding roll 8, via which the
supporting member loop 3 travels, and a press roll 10. It is also
possible to implement other kind of solution by combining the
features of FIGS. 1 and 2 together. For example, the solution of
FIG. 1 can be supplemented either with a third wire guiding roll 8
or a press roll 10.
[0067] FIGS. 1 and 2 also describe a reel 4 in a reeling stage. The
reel 4 is formed by reeling a web 5 moving along the track around a
reeling core 6, i.e. in the example around a reel spool. In the
example the reel spool 6 is also rotated with a center drive, which
is advantageously adjustable.
[0068] The reeling process of the belt reeler can be adjusted in a
controlled manner, thus forming machine reels 4 of the desired
kind. The parameters effective in the reeling include the following
parameters, shown in principle in FIG. 1: [0069] web tension P1
[0070] wire tension P2 [0071] distance of the machine reel from the
wire turning roll P3 [0072] depression of the wire/machine reel P4
[0073] surface draw P5, P5', P5'' [0074] peripheral force P6
[0075] To adjust the quality of the machine reel 4, the parameters
P1 to P6 are adjusted for example as a function of the diameter of
the reel and/or the web speed and the paper grade that is being
run.
[0076] The web tension P1 must be sufficient to attain optimal
machine reel structure 4. The web tension P1 is typically generated
substantially by means of a center drive. The contribution of the
center drive in the generation of web tension P1 is advantageously
greater than that of the wire turning roll 3, so that it is
possible to form a sufficiently tight machine reel 4.
[0077] By means of the tension P2 of the wire 3 it is possible to
affect the force transmitted via the wire and the surface of the
machine reel 4 to the machine reel. When the tension P2 of the wire
3 is increased, the force transmitted via the nip 7 to the machine
reel 4 is also increased, if other reeling parameters are kept
constant. The tension P2 of the wire 3 is adjusted by means of
actuators. The tension P2 of the wire 3 is typically in the order
of approximately 15 to 35 kN/m, depending on the force required.
The level of the force required is affected by several factors,
such as paper grade, web speed, etc.
[0078] During the run, the deflection and the tension P2 of the
wire 3 can be adjusted in such a manner that the effective pressure
exerted by the wire 3 on the reel 4 remains constant, or it is
adjusted in accordance with a desired "formula" as a function of
the diameter of the reel. The effective pressure exerted by the
wire 3 on the machine reel 4 is the tension of the wire P2 divided
with the radius of the machine reel.
[0079] The "equivalent linear load" exerted by the wire 3 on the
machine reel 4 can be adjusted (effective pressure multiplied with
the length of the nip) in accordance with a desired "formula" as a
function of the diameter, or the "equivalent linear load" is kept
constant. The length of the nip 7 is attained by multiplying the
wrap angle of the wire 3 with the radius of the machine reel 4.
When this is reduced, the equivalent linear load is the wrap angle
of the wire 3 multiplied with the tension P2 of the wire.
[0080] The torque of the wire guiding roll or rolls 1, 2 and the
drive of the machine reel 4, and advantageously also their bearing
friction are taken into account in the measurement, calculation
and/or adjustment of the tension P2 of the wire 3. The torques and
frictions either increase or reduce the tension of the wire 3
locally. Local change typically occurs on both sides of the drawing
or holding point. The torques and frictions also increase or reduce
the deflection of the wire 3, i.e. the angle of incidence and
departure of the wire.
[0081] The distance P3 of the machine reel 4 from the turning roll
of the wire 3 affects the length of the nip 7 formed by the wire
and the surface of the machine reel with constant depression
(>0). If the machine reel 4 is located close to the first wire
guiding roll 1 of the wire 3, which in the example is also a
turning roll, the nip 7 becomes longer as the wire rises on the
surface of the turning roll in a sharper angle. If the aim is to
keep the length of the nip 7 constant, the depression P4 must be
decreased when the machine reel 4 is located close to the turning
roll 1 of the wire 3.
[0082] The depression P4 of the wire/machine reel affects the area
between the wire 3 and the machine reel 4, via which the nip force
is transmitted to the machine reel. When the depression P4
increases, the area of the nip 7 affecting the machine reel 4 is
increased, and the force effective per unit area is decreased.
However, the total force effective through the nip 7 increases.
[0083] The deflection P4 of the wire/machine reel can be affected
for example when the deflection of the wire 3 is calculated and
adjusted on the basis of the locations of the wire guiding rolls 1,
2, the reel spool 6 and the diameter of the machine reel 4. The
diameter of the machine reel 4 is measured for example by means of
an ultrasound, laser or other kind of sensor positioned in a
primary and/or secondary reeling device 9. The diameter of the
machine reel 4 can also be determined by means of calculations on
the basis of the web speed of the drives and the speed of rotation
of the machine reel. The web speed can be determined by means of
web speed calculation of electric drives, or directly for example
by measuring with a laser surface speed measuring device.
[0084] The depression P4 of the wire/machine reel can also be
affected when calculating and adjusting the deflection of the wire
3 on the basis of the locations of the wire guiding rolls 1, 2, and
the reel spool 6. The calculation is based on the fact that when
the length of the wire 3 remains constant, the diameter of the reel
4 can be calculated accurately on the basis of the location data of
the wire guiding rolls 1, 2 and the reel spool 6.
[0085] The depression P4 of the wire/machine reel can also be
affected by adjusting the "equivalent linear load" exerted by the
wire 3 on the machine reel 4 (effective pressure multiplied with
the length of the nip 7) in accordance with a desired "formula" as
a finction of the diameter, or the "equivalent linear load" is kept
constant. The length of the nip 7 is attained by multiplying the
wrap angle of the wire with the radius of the machine reel 4. When
this is reduced, the equivalent linear load is the wrap angle of
the wire 3 multiplied with the tension P2 of the wire.
[0086] By means of surface draw P5 it is possible to affect the
tightness of the machine reel 4 to be reeled. The surface draw P5
is advantageously produced by decelerating the wire 3 by means of
the drive of the wire turning roll. The difference of the
deceleration produced by the peripheral force of the center drive
and the wire turning roll is the web tension P1.
[0087] According to FIG. 2, the surface draw P5' can also be
produced in such a manner that the machine reel 4 is positioned
directly against the first wire turning roll 1, i.e. the surface
draw is not substantially transmitted via the wire. Thus, the
distance P3 of the machine reel 4 from the turning roll of the wire
3 is substantially zero, taking into account the thickness of the
wire positioned between the roll and the machine reel.
[0088] The surface draw P5'' can also be produced by means of a
separate press roll 10, as shown for example in FIG. 2. This
alternative for a surface draw parameter is illustrated in FIG. 2
with the reference numeral P5''. Thus, it is possible to adjust the
reel formation by means of the combined effect of the surface draw
P5 produced by the press roll 10 P5' and the wire 3, for example by
means of the differences of the surface draws. By means of the
difference of the surface draw torques (P5'' to P5) produced by the
press roll 10 and the wire 3 it is possible to control the tension
of the reel 4 and attain a hard roll nip at the same time, which
advantageously increases the tightness of the reel when compared to
surface draw attained by the wire only.
[0089] In one embodiment it is also possible to produce the surface
draw as a combined effect of the surface draw torques P5' and P5'',
i.e. the placing of the machine reel directly against the first
wire guiding roll 1 produces the surface draw P5' of this part, and
additionally surface draw P5'' is produced by means of the press
roll 10.
[0090] The torques of the drives are adjusted in the direction of
resultant force exerted by the wire 3 on the surface of the reel 4
in such a manner that it is optimal in view of the nip force and
removal of air.
[0091] The wrap angle of the wire 3 is adjusted by the deflection
of the wire and the distance P3 of the machine reel 4 from the
first wire guiding roll 1. The distance P3 affects the angle of
incidence and departure of the wire 3 from the nip 7, and thus the
direction and magnitude of the resultant force of the machine
reel.
[0092] FIGS. 3 to 6 show a reeler solution. The presented belt
reeler is formed of a so-called pope reeler. The belt reeler
comprises at least a first wire guiding roll 1 and a second wire
guiding roll 2. The reeling cylinder of the pope reeler has been
converted into a first wire guiding roll 1 and advantageously into
a turning roll. Furthermore, the pope reeler has been supplemented
with a second wire guiding roll 2, a wire 3 and a wire guiding roll
8, which is advantageously equipped with a drive. Thus, it is
advantageously possible to form a belt reeler with a moving reeling
nip 7 and a stationary reeling station 9. The stationary reeling
station 9 may also be a moving carriage or the like.
[0093] By means of such a reeler it is possible to form a so-called
semi-hard nip 7 for the duration of the entire reeling process. The
semi-hard nip 7 comprises both a wire nip and a roll nip. The wire
nip 7 enables removal of air, which is an advantageous feature
especially at high speeds. The hard nip 7, in turn, is utilized to
affect the hardness of the reel 4.
[0094] The reeler enables fully supported web transfer to the
reeler. FIG. 3 describes the initial situation of the reeling. The
reel spool 6 is driven by a primary carriage and the reel spool 6
is in touch with the first wire guiding roll 1 via a supporting
belt loop 3. FIG. 3 shows the second wire guiding roll 2 in its
first position, i.e. down in the front. The tension of the
supporting member loop 3 is adjusted with a wire guiding roll 8. To
guide the supporting loop 3, the apparatus may also comprise
several wire guiding rolls. Furthermore, the figure shows a
secondary reeling station 9 equipped with a drive, which is
advantageously stationary. The figure also shows a press roll 10 in
the vicinity of the secondary reeling station 9, which can also
function during the entire reeling process or part of the same, or
it can be a mere surface binding device during/after the reel
change.
[0095] When the reeling is in progress the second wire guiding roll
2 is brought into a second position i.e. up in the front, as shown
in FIG. 4. Thus, the second wire guiding roll 2 is brought in
contact with the reel spool 6 via the supporting belt loop 3. The
wire guiding roll 8 is utilized to adjust the tension of the
supporting member loop.
[0096] In FIG. 5 the reel spool 6 is positioned in the secondary
reeling station 9. The nip 7 is thus formed with a second wire
guiding roll 2, which in the figure is positioned in its third
position, i.e. up in the back. Typically the surface binding device
10 is brought in contact with the surface of the reel 4 that is
being formed.
[0097] As the reeling proceeds and the reel 4 to be formed grows,
the second wire guiding roll 2 is lowered down, as shown in FIG. 6.
When the reel 4 starts to reach its target size, the next reel
spool 6 is brought in contact with the first wire guiding roll 1 by
means of the primary carriage drive for change purposes. When the
change has taken place, the second wire guiding roll returns from
the described fourth position to its first position, and further to
the other above-described positions as the reeling proceeds.
[0098] As can be seen in FIGS. 3 to 6, a nip 7 that comprises a
wire nip and a hard nip is constantly in use in the presented
embodiment. Often it is easier to control the wire loop 3 with a
longer wire loop. Thus, is it advantageous to use several rolls via
which the wire loop 3 circulates. The third wire guiding roll 8 is
necessary also in that respect that the wire guiding roll 2 moves,
and still the length of the wire 3 remains the same. Thus, the
movement of the wire guiding roll 8 compensates the change produced
by the movement of the roll 2 in the length of the wire loop 3.
[0099] The presented solution makes it possible to change a
conventional reeler into a wire reeler in a simple manner. In the
belt reeler it is possible to use the above-described control
methods to produce a reel 4 of a desired kind. Furthermore, in some
embodiments the presented belt reeler makes an advantageous
positioning of the pulper possible. Furthermore, the structure
enables a low storage, because the up-and-down movement of the
carriages performs the lowering of the reeling cores 6 in the
storage.
[0100] FIGS. 3 to 6 present a way of implementing a belt reeler. As
to the modifications made in the reeler, the final way of
implementing the belt reeler is substantially dependent on the
original reeler. FIGS. 7 to 12 show some other embodiments of
implementing a belt reeler.
[0101] FIGS. 7 to 9 show a belt reeler formed of a so-called
Optireel.RTM. reeler. The reeler comprises at least two wire
guiding rolls 1, 2. The first wire guiding roll 1 is stationary and
in said embodiment it is the reeling cylinder of the original
reeler, or a wire guiding roll replaced in the corresponding
position. The wire guiding roll 2 of the example is arranged
movable. Depending on the application, there may also be a larger
number of rolls. The moving wire guiding roll 2 is utilized to
control for example some parameters of the supporting belt, such as
the tension P2 and depression P4 of the wire.
[0102] FIG. 7 shows a situation in which the formation of the reel
4 around a new reel spool 6 is started. The figure also shows the
reel 4 that is being formed. As can be seen in the figure, the nip
7 of the reel 4 that is being formed is essentially a wire nip. The
nip 7 of the reel 4 that is being started is, in turn,
substantially a hard nip formed with a roll-wire combination 1, 3
by means of which a sufficiently tight reel bottom is attained.
[0103] As the reeling proceeds, the reel 4 that is being formed is
transferred along a supporting belt loop 3 towards the other end of
the wire reeler, in which the second wire guiding roll 2 is
located. This situation is shown in FIGS. 8 and 9.
[0104] In the example shown in FIGS. 7 to 9 the web 5 to be reeled
is passed to the reeler substantially horizontally. In some reeler
embodiments, the passing of the web 5 can occur from another
direction. For example in the embodiment shown in FIGS. 10 to 12
the web 5 is passed to the reeler substantially vertically. FIGS.
10 to 12 show in principle a belt reeler deviating from the
preceding embodiment. Such a reeler can be formed for example of a
center-driven reeler of prior art, in which the reeling cylinder
has originally moved in the horizontal direction. Thus, for a large
part of the reeling time the reel spool 6 can be stationary, while
the reeling cylinder moves as the reeling proceeds. The web 5 is
brought to the reeler advantageously in the vertical direction, so
that the effect of the web tension P1 on the horizontal movement of
the wire guiding roll 1 and on the horizontal nip load measured
from its loading members would be as small as possible.
[0105] The reeler shown in FIGS. 10 to 12 comprises at least two
wire guiding rolls 1, 2. The first wire guiding roll 1 is arranged
to move substantially horizontally, and in said embodiment it is
the reeling cylinder of the original reeler, or a new wire guiding
roll replaced in a corresponding position. If necessary, the wire
guiding roll 1 can be locked so that it moves in a fixed position
continuously or for some time. The wire guiding roll 2 of the
example is arranged movable. Depending on the embodiment, there may
also be several rolls, and in view of the use, it is often
advisable to use for example four, five or six rolls. One or
several moving wire guiding rolls 2 are utilized to control for
example some parameters of the supporting member loop, such as the
tension P2 and depression P4 of the wire.
[0106] FIG. 10 shows a situation in which the formation of a reel 4
around a new reel spool 6 is started. The figure also shows the
reel 4 that is being formed. As can be seen in the figure, the nip
7 of the reel 4 that is being formed is essentially a wire nip. The
nip 7 of the reel 4 that is being started is, in turn,
substantially a hard nip formed by a roll-wire combination 1,
3.
[0107] As the reeling proceeds, the reel 4 that is being formed is
transferred along a supporting belt loop 3 towards the other end of
the wire reeler, in which the second wire guiding roll 2 is
located. This situation is shown in FIGS. 11 and 12. In one
embodiment, the reel 4 that is being formed may remain in its place
from the beginning of the reeling almost until the end of the reel
formation, wherein the supporting member loop 3 or at least its
first roll 1 is transferred according to the growth of the reel,
for example horizontally to the left. The actuators can be
actuators used for moving the reeling cylinder of an original prior
art reeler, such as horizontal guides and loading cylinders. As
long as the reeling takes place against the roll 1 with a hard nip,
the nip load of the nip 7 can be determined at least partly from
sensors connected to the actuators of the roll 1, such as force
sensors and pressure sensors of the hydraulic cylinder. In the
situation of FIG. 11, the nip load can be determined in addition to
the loading measurement of the roll 1 on the basis of the
tension/depression P2, P4 of the wire and/or as a combination of
the measurements.
[0108] In the above-presented belt reeler solutions relating to
FIGS. 7 to 12, the position of the reel spool 6 is arranged movable
at least in some stage of the reeling. It is also possible to
implement the belt reeler in such a manner that the reel spool 6
that is being formed rotates in its place during the reeling
process.
[0109] FIGS. 13 and 14 show a reeler solution comprising two
stationary reeling stations 11, 12, such as reeling frames, for
reel spools 6. Between the reeling stations 11, 12 travels a
supporting member loop of the belt reeler 3 that forms a reeling
nip 7 and helps in taking the web from one reeling station 11, 12
to another. The supporting member loop 3 of the reeler moves along
with the diameter of the reel 4 and both opens and/or closes the
reeling nips according to the situation. In FIG. 13 the first reel
4 is being completed in the second reeling frames 12, and the
formation of the new reel is being transferred to the first reeling
frames 11. In FIG. 14, in turn, the reel has been completed in the
first reeling frames 11 and the new reel is reeled in the second
station 12.
[0110] The reeler comprises at least a first wire guiding roll 1
and a second wire guiding roll 2. Depending on the embodiment,
there may also be several rolls, and in view of the use, it is
often advisable to use for example four, five or six rolls. In the
embodiment of FIGS. 15 and 16, there are for example three rolls
that are arranged movable. In FIG. 15 the first reel 4 is being
completed in the second reeling station 12, and the formation of a
new reel is being transferred to the first reeling frames 11. In
FIG. 16, in turn, the reel has been completed in the first reeling
frames 11 and the new reel is reeled in the second station 12.
[0111] The reeling stations (reeling frames) 11, 12 can also be
positioned on different heights with respect to each other, as
shown in FIGS. 17 to 20. In FIGS. 17 and 18 the supporting member
loop 3 travels via two wire guiding rolls 1, 2 and in FIGS. 19 and
20 via several rolls. By means of several rolls it is possible to
attain easier control of the wire 3. In FIGS. 17 and 19 the first
reel 4 is being completed in the second reeling station 12, and the
formation of a new reel is being transferred to the first reeling
frames 11. In FIGS. 18 and 20, in turn, the reel 4 has been
completed in the first reeling frames 11 and a new reel is being
reeled in the second station 12.
[0112] In FIGS. 13 to 20 the tail threading in connection with belt
reelers takes place advantageously in a similar manner as in
current reelers. The empty reel spool 6 can be located in either
reeling frame 11, 12. In the tail threading the tail of the web 5
is passed and spread in full width. Thereafter the tip of a wedge
is cut and the end of the web 5 is blown around a reel spool 6
located either in the first 11 or in the second reeling frame 12
for example by means of a gooseneck or the like. The tip of the
wedge can be cut with a suitable device, such as a waterjet cutting
change device.
[0113] When the reeling is in progress, the reeling frame 11, 12
used in the reeling must be changed when the reel 4 has been
completed. When the full machine reel 4 is positioned in the latter
reeling frame 12, the tip of the wedge is cut in the change with
the waterjet cutting change device. The tip of the wedge is blown
on an empty reel spool 6 located in the first reeling frame 11.
Thus, it is possible to operate substantially in a similar manner
as in tail threading or in changes currently conducted by means of
a waterjet cutting change device.
[0114] When the full machine reel 4, in turn, is positioned in the
first reeling frame 11, the tip of the wedge is cut off in the
change by means of the waterjet cutting change device. The tip of
the wedge is prevented from turning with the web 5 on the surface
of the machine reel 4 that is being formed. For this it is possible
to use for example suction underneath the wire 3 or preventive
blowing on top of the wire. Thus, the tip of the wedge continues
its travel along the surface of the supporting member loop 3 to the
second reeling frame 12. When the web 5 has passed the reel spool 6
in the second reeling frame 12, the waterjet cutting change device
performs a cutting all the way to the edges, and the web 5 is blown
around the reel spool 6 in the second reeling frame.
[0115] In connection with the belt reeler it is possible to use the
following change method. FIG. 21 shows in a top view a belt reeler
comprising a first wire guiding roll 1 and a second wire guiding
roll 2 through which the wire 3 travels. In the figure, the wire 3
is shown in broken lines, because the paper web 5 that is wider
than the wire has been positioned on top of the wire 3, traveling
through the nip 7 between the wire and the reel spool 6. In the
change method the new reel spool 6 is provided with an adhesive
element 13 in the area remaining outside the wire/wires 3. The
adhesive element 13 can be formed in various ways, for example by
means of a double-sided adhesive tape, by spraying of glue, etc.
The change is conducted by cutting a tail in the cross direction at
the location of the adhesive element 13 (for example from one edge
of the web or from the middle). The tail cut by means of waterjet
is deflected towards the reel spool 6 for example by means of a
movable member 14 located after the nip 7, or by means of a
deflection element fed in said point in the nip 7. The deflection
element also makes the cutting of a wedge instead of a tail
possible. At the same time when the tail/wedge adheres on the
adhesive element 13 in the reel spool 6, the spreading of the web
on the reel spool begins (spreading of cutting devices 15).
[0116] In view of reel formation, i.e. especially the straightness
of the nip it is advantageous that the wire 3 is not larger in
width, that it is advantageously narrower than the web 5 from which
the reel 4 is formed. Thus it is easy to arrange the adhesive
element 13 at the edge of the reel spool 6 without said adhesive
element adhering to the wire 3.
[0117] In cases where the change is conducted in the middle of the
web 5, a space is arranged in the middle of the reeler at the
location of the adhesive element 13, because it is advantageous to
have the adhesive element 13 in such a location where the wire is
not present. The belt reeler that comprises two or several wires 3,
the space between the wires may be formed only for the duration of
the change by deviating one or several wires sideways.
[0118] During the change the controlled detachment of the tail from
the reel spool 6 can be ensured by means of a suitable solution.
One such solution is a so-called tail-shooter blowing plate that
keeps the tail down. The purpose of the solution is to ensure that
the floating web 5 does not accidentally adhere to the adhesive
element 13 too early. This is possible especially when the distance
between the adhesive element 13 from the web 5 before the change is
small, for example not larger than the thickness of the wire 3, or
smaller. The distance is also affected by the thickness of the
adhesive element 13 and the shape of the coating of the reel spool
6, which can be for example narrower at the ends.
[0119] One change embodiment can also be utilized in conventional
reelers. In the embodiment, an adhesive element 13, such as an
adhesive tape, pressure-activated adhesive tape or a corresponding
structure is installed in the reel spool 6, in an area outside the
paper web. The pressure-activated adhesive tape is activated when
the nip 7 is closed and the adhesive tape is subjected to pressure.
By placing the adhesive element 13 outside the web it is possible
to efficiently prevent the adhesive element and the web from
adhering to each other prematurely, wherein the change can be timed
for example in the waterjet cutting change. The cutting of a tail
from the edge of the web starts at the same time when the nip 7 is
closed. Thereafter the narrow tail is deviated in the lateral
direction at the location of the adhesive area 13, wherein it
adheres to the adhesive agent. The adherence of the tail to the
adhesive agent is followed by spreading. The method is suitable
especially for slow paperboard machines and for solutions in which
the wire 3 is not narrower than the web.
[0120] For example when a thick paperboard web is being reeled and
the adhesive element 13 that is narrower than the web to be reeled
5 is located in the reel spool 6 outside the edge of the web, the
adhesive element 13 does not touch the reeling cylinder 1 when the
nip 7 is closed. It is not until the cut tail or the entire web 5
is transferred in the cross-direction at the location of the
adhesive element 13 that it touches the adhesive agent and performs
a change.
[0121] The reeler used for the change comprises several different
structures and parts. The final configuration depends on the
application and the purpose of use of the device. The device can
for example contain a tail cutting device.
[0122] By combining, in various ways, the modes and structures
disclosed in connection with the different embodiments of the
invention presented above, it is possible to produce various
embodiments of the invention in accordance with the spirit of the
invention. Therefore, the above-presented examples must not be
interpreted as restrictive to the invention, but the embodiments of
the invention may be freely varied within the scope of the
inventive features presented in the claims hereinbelow.
* * * * *