Technical field
[0001] The present invention refers to the technical field of the production of reels, preferably
made of paper but also of other materials, such as non-woven fabric or materials obtained
from plants, such as cotton.
[0002] In particular, the invention refers to a method and related device, which allows
to produce reels, which tape is in the form of two or more plies glued each other
in efficient and functional way.
Background art
[0003] The technique for producing paper mother reels has been known for a long time.
[0004] The equipment foresees the cellulose processing, which is mixed to water and other
additives. Therefore, a tape is produced, passing along a drying section where it
is subjected to warm air flows, in such a manner so as to leave said section substantially
dried.
[0005] While leaving the drying section, the tape is rolled up to a mother reel, which is
ready to be processed in the shape of napkin, interleaved towels, etc., depending
on needs and on specific machineries which are not the object of the present invention.
The reel (or more than one reel) is then mounted on aforementioned specific machineries
(for example rewinders or interleaving machineries) and it is unwound along a processing
path which leads to the final product.
[0006] It is often necessary to produce mother reels wherein the tape is practically formed
by two or more overlapping plies and glued each other. For that purpose, the prior
art foresees the coupling of two of more plies, which are unwound from their related
mother reels and that overlap each other once the glue is sprayed. Therefore, a gluing
section is foreseen where the glue distribution takes place and a further section
wherein the two or more tape plies are overlapped each other, attaching together by
means of the spread glue. Therefore, the exiting tape is a single glued tape formed
by one or more plies. Finally, the tape obtained by gluing the aforementioned two
or more plies is rolled up in a mother reel (defined Jumbo Roll in technical jargon),
which is ready to be mounted and fed to specific machineries for paper processing
and so for the production of interleaved towels, rolls, toilet paper, etc.
[0007] Over the prior art, the glue distribution for the production of mother reel of two
or more plies can take place is various ways. Document
EP 0 440 117 discloses a typical glue distribution method and device in a system foreseen for
combining two webs.
[0008] In a case, for example, the passage of at least one of the two tapes is foreseen
in contact with a transverse rotatable roller which is wet with glue, as it is semi-immersed
into a tank containing glue, for example. The roller rotates slowly, by drawing glue
time by time. The ply transits along its path by brushing against the roller, thus
soaking by glue along its diagonal length, corresponding to the span of the roller
(i.e. its diagonal length). In that way, along the processing path, such a ply in
form of a tape is coupled to the other ply coming from the other mother reel and then
attach together to form a single two-ply tape.
[0009] The main technical inconvenience with the use of a distribution roller is the impossibility
to reach producing speed over 700 m/min. The whole system results in a strong productive
limitation, as modern rewinders reach normally 1000-1200 m/min speed approximately.
In addition, the lamination by means of a roller modifies the appearance of the final
product. As a matter of fact, as the glue is spread uniformly onto plies, the two
or more paper plies result finally less soft and dry to the touch and so hardly processable.
Grooved rolls could be used for trying to minimize the problem, or using a regular
embossing roller, but anyway the final appearance of the product would be modified
in any case and showing visible strips or "small spots". In addition, it is important
and also difficult, to adjust the paper tension conveniently, in order to make it
brush the roller soaked by glue. This process is not so easy.
[0010] Therefore, it is not possible over the prior art to have a product with two or more
glued plies with "smooth" and soft appearance and with technical features of homogeneous
processing.
[0011] Another prior art foresees the use of fixed nozzles, which spray and nebulize glue
during the passage of the unwinding roll. Nozzles, generally more than one, are arranged
in a specific section of the machinery along it diagonal length, in such a manner
so as to intercept and cover the diagonal length of the passing tape. The spraying
nozzles are connected to a glue tank and they begin to spray while the paper tape
is passing, thus soaking the passing ply along its whole diagonal length. The rest
of the process is equal to the described one, that is the tape soaked by glue is attached
to a second tape, thus creating a double-ply.
[0012] The same technique (both by means of roller and by means of spray nozzles) is obviously
applied to the case of three or more plies.
[0013] A problem occurred with the use of simple fixed nozzles is that they lose glue drops
in use, falling to the ground and thus creating dangerous puddles for the operators'
safety. Accidents due to slipping are frequent. Moreover, glue stiffens as time passes
by, sticking to soles, thus making the whole environment dirty and resulting in being
hardly cleanable. Another inconvenience concerns the nozzles which become easily obstructed
by glue, thus spraying badly as time goes by and altering the product quality. They
often get totally obstructed and their replacement or anyway a cleaning operation
is necessary.
[0014] Therefore, it is clear that, although the use of fixed nozzles succeeds in solving
the technical problem of a better distribution of the glue amount compared to the
use of the roller, without modifying the final product appearance and allowing high
processing speeds, nevertheless obstruction and dropping problems remain unsolved,
as they cause many safety problems to the operators and the necessity of continuous
checks and maintenance. Moreover, the spraying obtainable by spray nozzle creates
a "fog" effect which must be limited to avoid glue dispersion into the surrounding
environment at a distance from the dispersion point.
Disclosure of the invention
[0015] It is therefore the aim of the present invention to provide an innovative method,
and related machinery, which solves the aforementioned technical inconveniences.
[0016] In particular, the aim of the present invention is to provide a method, and related
machinery, which allows to spread the glue on one or more paper plies to form the
two-ply or more-ply tape, in such a manner that a homogeneous distribution occurs,
thus avoiding areas with glue excess or areas without glue.
[0017] At the same time, the aim of the present invention is to provide a method, and related
machinery, which allows to obtain a paper tape with two or more paper plies with great
qualities, that is soft and processable, even guaranteeing a good endurance between
the two or more plies glued each other.
[0018] The aim of the present invention is also to provide a method, and related machinery,
which minimizes the risk of malfunctioning of the means used to spread the glue and
minimizes accidental loss due to drip, which may cause puddles.
[0019] These and other aims are therefore obtained through the present method for the production
of a tape with two or more glued plies, according to claim 1.
[0020] Such a method comprises the following phases:
- The feeding of at least a first ply (100, V1) in the form of a tape along a first
processing path;
- The feeding of at least a second ply (200, V2) in the form of a tape along a second
processing path;
- Distribution of the adhesive material (C1) on at least two plies along the processing
path and subsequent overlapping of said two plies.
[0021] According to the invention, the distribution process of the adhesive material is
now made through the rotation of at least one element of rotating distribution (3),
to which said adhesive material is fed and which throws, by centrifugal force, a nebulization
of said adhesive material.
[0022] In this way, all the aforementioned technical inconveniences are easily solved.
[0023] It has been surprisingly found that the use of a rotor which sprays the glue while
rotating allows a homogeneous distribution, with drops of a correct size, such that
the gluing proves to be efficient without altering the qualities of the product.
[0024] Moreover, the use of the aforementioned rotors minimizes the problem of the fogs,
due to traditional nozzles and eliminating the obstruction problem that does not occur
because of structure and operation of rotors.
[0025] Therefore, the production of paper or other material reels, for example in a rewinder
machinery, can use such a technology in order to optimize the quality of the obtained
final product.
[0026] According to the claim about the gluing section and machinery which includes said
section, preferably a rewinder machinery, the same advantages occur.
[0027] Further advantages are inferable from the remaining dependent claims.
Brief description of drawings
[0028] Further features and advantages of the present method and relative machinery or section,
according to the invention, will result to be clearer with the description that follows
of some embodiments, made to illustrate but not to limit, with reference to the attached
drawings, wherein:
- Figure 1 outlines the centrifugal device 1, known in itself, used in the present invention
and which is able to produce and cast a nebulization of adhesive material, generally
an adhesive fluid, while figure 2 shows a possible known solution to produce a rotor
3 of such a centrifugal device for generating and casting the glue nebulization by
means of its rotation;
- Figure 3 outlines a production line, to produce for example paper rolls or reels in
a rewinder machinery, wherein a potential positioning example of the centrifugal devices
(1, 1') is shown;
- Figure 4 is a further schematization which highlights the passage of the paper tape
in front of the centrifugal device 1;
- Figure 5 shows the nebulized drops spread on a part of the tape;
- Figure 6 shows a solution wherein the used centrifugal device is connected to a system
50 for maintaining at a certain distance the paper tape, together with a system 60
for collecting the exceeding glue;
- Figure 7 outlines a preferred positioning of the centrifugal device with respect to
the passage of the tape;
- Figure 8 shows the system 50 for maintaining at a certain distance the paper tape
of the paper in form of a holed rod 50, through which air under pressure is blown
to maintain the tape separated from the centrifugal device;
- Figure 9 and 10 show respectively the positioning of the centrifugal device in a production
line of two and three plies.
Description of some preferred embodiments
[0029] Devices of the rotatable type have been known for a long time (i.e. centrifugal ones),
suitable for nebulizing liquids/fluids thanks to centrifugal force.
[0030] Many kinds of this device exist and they are formed by rotors, rotating plates for
example, which foresees a certain radial canalization.
[0031] They are connected to a feeding system of the fluid to be sprayed and, by means of
suitable rotating means, are put in fast rotation, while the fluid feeds them. The
fed fluid is throws by centrifugal force along said specifically shaped radial channels
and it is sprayed and throw radially to a certain distance, that is for a certain
distance and with a preset angular spacing.
[0032] As an example, the publication
US2009/0212128 is known, describing a plate which allows to spray and cast by centrifugal force
a fluid to a certain distance.
[0033] Another solution example is published in
EP0796662 which describes a centrifugal apparatus and related method to spread a treating fluid.
Figure 2 in attachment shows the rotor used in
EP0796662 specifically.
[0034] Provided that, fluids that are sprayed with such a kind of centrifugal device are
always perfuming liquids, lotions or softeners, in such a manner that the finished
product has better softness and/or perfuming features.
[0035] The aforementioned apparatuses are purchased by factories for paper production, in
order to use them for spraying liquid perfuming solutions or conditioners exclusively.
[0036] The same publication
EP0796662 specifies the use of the aforementioned apparatuses for casting treating liquid,
such as conditioners.
[0037] Nowadays, it has been surprisingly tested and found that the use of the aforementioned
rotating apparatuses is able to throw efficaciously also a fluid like glue, which
has technical features, like viscosity, specific weight and its own gluing features
which make it very different compared to treating liquids which are sprayed with the
aforementioned centrifugal apparatuses.
[0038] Therefore, the implementation of the aforementioned centrifugal apparatuses as glue
distributing system along the passage of paper not only allows to optimize the glue
distribution but also, as explained further, allows to solve all the technical inconveniences
of prior art, without causing obstructions due to glue in the rotating device, although
it is specifically made for balsamic or perfuming lotions.
[0039] The technical expedient to replace the known apparatuses of glue distribution, such
as roller or nozzles, with the aforementioned rotating device, allows to obtain an
optimal glue distribution, thus optimizing the quality of the product with respect
to results obtained by rollers, thus reducing the problems of dripping and mists.
Therefore, it has been found that it is possible to adjust precisely the glue amount
to spray and the nebulization with the use of the aforementioned apparatuses and,
at the same time, the leakage by dripping are minimized, as well as the problems of
nozzles obstructions.
[0040] Figure 1, as an example, describes a part of such an apparatus of the rotating type
1, wherein rotors 3 and flexible ducts 2 through which the fluid is fed, (glue in
this case) are highlighted. Always figure 1 shows the openings 4 which lead to rotors
and through which the nebulization is cast.
[0041] It has been found that a particularly functional model for that purposes is the system
"WEKO RF COMPACT 3" - "ARTICLE 650445", produced by WEKO.
[0042] As outlined in figure 1, such a model foresees a sequence of rotors 3, forming a
line one next to the other and which lead to an opening through which the glue is
throw and such an opening is re-closable through a shutter (S) (see for example figure
6). In this way, at the end of use, the shutter (S) can be closed again automatically
to avoid spurts and dropping of glue throughout the environment.
[0043] Therefore, this own expedient of the aforementioned model helps to reduce glue leakage
throughout the environment.
[0044] The device 1, as shown in figure 4 or in figure 6, is placed to a certain distance
from the paper tape passing horizontally according to the arrow direction of figure
6 downwards.
[0045] According to the invention, it has been surprisingly found that the distance between
the paper tape and the rotor which casts the glue can be comprised preferably between
20mm and 25mm (even more preferably, ranges between 20mm and 23mm or between 20mm
and 22mm are optimal) with an unwinding direction, and therefore of paper passage,
from top downwards (see the arrow direction of figure 4 or figure 6). As a matter
of fact, in case of specific use of the aforementioned WEKO device, the producer,
as per figure 7, recommends a distance of 18mm with an unwinding of paper from bottom
upstream with the help of a carter placed behind the paper. It has been found that
such an arrangement creates many problems with fogs, dropping and motions, for this
reason the above-mentioned ranges between 20mm and 25mm with the passage of paper
from top downwards solve said problems, above all if the carter behind the paper itself
is removed.
[0046] As a matter of fact, figure 4, highlights that the centrifugal device is not coupled
to a carter to the opposite side of the tape.
[0047] The above-mentioned WEKO model is used, according to the invention, with a 2800 RPM
speed, that is the rotating speed of rotors spraying the glue is fixed and not adjustable.
Such a value is however optimal for obtaining correct spraying effects, eventually
by increasing the flow rate and maintaining constant the rotation when the forward
motion speed of the tape increases.
[0048] Moreover, the use of such a centrifugal system eliminates the risks of obstructions
completely, as there are no fixed nozzles. At most, obstructions of filters can occur
but they can be replaced also in use, thus allowing to wash the dirty one for its
reuse.
[0049] Therefore, the preferred rotation speed of rotors is approximately 2800 RPM.
[0050] Such a speed is independent from the forward motion speed of the tape but, as already
said, the flow rate can be varied, that is the glue feeding to said centrifugal device.
[0051] As alternative, it would be also possible to vary the speed. Therefore, a new version
of centrifugal system is available, always produced by Weko, allowing to vary the
speed rotation of rotors.
[0052] This is possible thanks to a control panel which allows to modify Hertz, thus varying
the rotation speed of rotors consequently.
[0053] The new system foresees the Hz variation in a range of 40 ÷ 60 Hz.
[0054] Low speed entails bigger and heavier drops.
[0055] As the rotating speed is increased, drops result in being smaller and lighter.
[0056] Therefore, the following settings would be possible:
- 40 Hz -> 2'400 rpm;
- 50 Hz -> 3'000 rpm;
- 60 Hz -> 3'600 rpm
[0057] The new system allows to adjust these parameters by the control panel.
[0058] It is recommended to work preferably with 50 Hz, thus obtaining similar speeds to
the model with fixed speed described above.
[0059] In theory, it would be useful to work with Hz comprised between 20 ÷ 80 Hz, in such
a manner so as to vary the speed, in order to "pulverize" the glue depending on needs
and depending on the paper speed.
[0060] Obviously, the flow rate of glue is adjusted by a pump which feds the glue toward
the aforementioned apparatus 1. Therefore, if the production speed increases, so the
forward motion speed of the tape increases and it is possible to operate by increasing
the flow rate and/or varying the rotating speed of rotors, in such a manner so as
to maintain the sprayed glue amount fixed per square centimeter.
[0061] However, if the available technology does not allow to vary the rotation speed of
rotors, it is necessary to operate on the flow rate of the pump only.
[0062] Generally, the pump which feeds the centrifugal device is regulated on values ideal
for balm. Therefore, the inverter which monitors the pump engine can be programmed
in such a manner so as to allow to vary the pump speed depending on specific need,
in the case of use of glue.
[0063] Moreover, in order to optimize the glue spraying, measuring valves with 1mm diameters,
instead of measuring valves equipped with 0,54mm diameters, have been used, those
valves can be customized upon request to the producer. In those types of well-known
devices, the aforementioned Weko model in particular, a flexible tube 2 is foreseen,
bringing the fluid to the rotor. The rotor, as already said, is rotatable around an
axis. The flexible tube 2 is connected to a feeding duct, which is equipped with an
adjusting valve, that is said adjusting valve (not represented in figure 1 for the
sake of simplicity). It has to be underlined that the 0,54mm diameter is a standard
converting size. The need to increase the flow rate has led to such a selection of
increased diameters, speeds of the current rewinder machineries permitting. Moreover,
by using increased (heavier) bulks (types of paper), adjusting valves of bigger sizes
will be necessary.
[0064] Therefore, if the standard value 0,54 for conditioners was not used with the glue,
the glue feeding would not be enough, while the optimal use of 1mm glue would be excessive
in the case of conditioners.
[0065] Carrying on with the structural description of the invention, figure 3 outlines a
production line (rewinder machinery), wherein two paper tapes are glued each other,
in such a manner so as to obtain a single two-ply tape which will form the two-ply
mother roll. The arrangement of figure 3, as explained further, is for the production
of three or more plies and it is to be highlighted that the other gluing sections
have been omitted for the sake of simplicity.
[0066] Therefore, as shown in figure 3, a first mother roll 10 is highlighted, formed by
a wound paper tape and from which such a tape 10 unwinds, which forms a first-ply
of the tape. As outlined in the figure, such a ply of tape 100 is made pass in front
of the centrifugal device 1, where the glue is sprayed along the horizontal length
of the tape.
[0067] Figure 4 shows in details, as already said, the passage of paper in front of the
apparatus 1.
[0068] A second ply of the paper tape is unwound equally from a second reel 20, following
his processing path itself.
[0069] If a two-ply tape is produced, the glue is spread only on a side of a ply, attaching
together the two plies subsequently. Instead, in the case of more plies, the glue
is spread on a side of the first ply and on the opposite side of the subsequent ply
(as in figure 3).
[0070] For clarity purposes, figure 9 shows a machinery for the production of a glued two-ply
tape, wherein only a centrifugal device is arranged, spraying on the side of a ply
only, in such a manner that the glue layer (C1) is comprised between the two plies
to glue them. Instead, in the case of three plies, as in figure 10, the glue is spread
onto the side of the first ply (V1) which glues to the second one (V2) and to the
opposite side of the second ply (V2) which glues to the third one (V3). The same sequence
is repeated in the case of four or more plies, by spreading additional glue on the
opposite side of the third ply which glue to the fourth one, etc. Then plies along
the path are attached by gluing by overlapping one another as per prior art and then
they are wound onto a single mother reel (see schematization in figures 9 and 10).
[0071] According to such a technique, it is obvious that any number of plies (even three
or more) can be spread with glue and then they are overlapped one another.
[0072] The used glue is preferably a traditional glue used in the specific technical field
of "coverting paper". It is a polyvinyl alcohol based glue that must be used with
certain dilutions, compatible with the centrifugal device. The dilution from 1:2 (two
liters of water each liter of glue) to 1:10 (ten liters of water each liter of glue)
range has proved to be optimal, depending on the glue supplier. The optimal dilution
proves to be 1:5.
[0073] The bought glue has to be diluted, according to the aforementioned dilutions. To
maintain its features, a continue agitation of the solution is necessary, as water
and glue tend to separate themselves. Therefore, a preparation tank has been foreseen
and it is placed close to the Weko machinery with an agitating system with a lower
number of rotations than the preparation tub, to avoid the separation between glue
and water. This second tank is linked to a feeding system, a pump for example, which
feeds the diluted glue continuously, in such a manner so as to maintain the processing
conditions stable.
[0074] Nevertheless, the use of different glues, already diluted with various dilution degrees,
is not excluded.
[0075] In order to optimize the machinery, further expedients have been added.
[0076] One of these expedient concerns a blowing system 50 to distance the paper from the
section which sprays the glue by means of the described centrifugal device (see figure
6).
[0077] This is necessary as, even if glue is not supplied, the risk of contact of paper
parts to the parts of the spraying device may occur, leading the paper to stick to
it, as a result of residual glue. Even if the aforementioned Weko model is specifically
used, foreseeing a closing shuttle which isolates rotors, the risk is still present,
as other parts of the Weko machinery itself may be dirtied by glue. In particular,
potential motions or loosening of paper tension may bring the product in contact with
the glued parts. As a matter of fact, glue dirties the machinery body and if the paper
touches the glue, it tears off while restarting: then it is necessary to clean the
whole machinery with a waste of time, as glue and paper creates a mixture difficult
to remove. Moreover, it is necessary to arrange the passage of paper again.
[0078] For that purpose, as shown in figure 6 and figure 8, a rod 50 has been added (simply
made by a holed tube), wherein pressurized air flows. Holes are directed properly
and work as nozzles. The rod is arranged in such a manner that the air flow intercepts
the paper tape diagonally. As the WEKO system begins to work, the air cast by nozzles
maintains the paper distanced from the machinery itself. The air pressure range may
be between 0,05 bar to 1 bar, with a found optimal value of 0,15 bar.
[0079] Generally, the air flow is continuous and is sent also during the normal operation
of the machinery, that is while gluing. In this way, the air helps to conduct better
the sprayed glue on the passing paper, thus allowing to obtain a double advantage.
Moreover, air flows allow a more efficient gluing, because they prevent the dust from
depositing onto the paper tape and the glue can have a better adherence on the paper
itself.
[0080] According to the embodiment of the invention, a containing tank 60 has been integrated
below said section which sprays glue by centrifugal force (outlined in figure 6) .
As a matter of fact, hat centrifugal system are used for conditioners and a potential
conditioner excess is absorbed by paper. Instead, a potential glue excess causes the
paper to rip. The glue system used in the paper factory operates in an environment
different from those one for such converting centrifugal devices. For example, there
is more dust in the paper factory. If it is dispersed in the environment, the glue
together with dust forms clumps which stick to the various parts of the machine, thus
spoiling its operation. For this reason, the tank 60 collecting the exceeding glue
has been integrated, placed below the centrifugal device. The position can be optimized
by placing the tank slightly backward with respect to the rotor itself, in order to
collect as much glue as possible, thus facilitating the further cleaning and the maintenance.
Therefore, if glue is collected, it will be held in the tub, even forming clumps together
with dust, without the risk of dirtying other parts of the machinery or even the paper
under production.
[0081] Moreover, according to the embodiment of the invention, if a conditioner is used
and it is sprayed onto rollers as paper has some defects (holes, rips or lacerations),
no problems occur: the conditioner is reabsorbed by paper during the passage. Instead,
in the case of glue, it is necessary to stop the supply, as the paper passing on the
roller may cause the paper itself to rip, due to holes, as glue begins to stiffen.
For that purpose, a controlling system has been integrated, in order to detect paper
breakages or lacerations, such a technology is very well known in itself in the technical
field of paper processing.
[0082] Ultrasound and optical sensors have been placed in suitable points upstream the gluing
section (also different sensors may be used, such as for example inductive optimal
sensors, in the case of dark paper colorations). The aforementioned sensors are placed
upstream the centrifugal device, along the unwinding path of the paper. Sensors are
connected to the centrifugal device and, as they detect a hole or a laceration on
paper, they send a signal for closing the shutter of the rotor, thus preventing the
glue from being sprayed. The defective paper is removed by the operator, which lets
an extra piece to the strips of "healthy" paper and starts again, making the shutter
open from the panel. As alternative, sensors can block the glue supply and/or block
the operation of the whole production line.
[0083] Finally, figure 5 shows the result obtained as the glue is sprayed onto a paper passing
approximately 1200 meters per minute (extremely high speed). The figure shows a uniform
distribution of nebulized drops which lay on the part of the passing tape.
[0084] The preferred embodiment of the invention is destined for the paper production, preferably
paper reels, but the interleaved towels production is not excluded.
1. A method for the production of a tape with two or more glued plies, the method comprising
the following phases:
- The feeding of at least a first ply (100) in the form of a tape along a first processing
path;
- The feeding of at least a second ply (200) in the form of a tape along a second
processing path;
- Distribution of the adhesive material on at least one of the two plies along the
processing path and subsequent overlapping of said two plies;
- Characterized in that said distribution process of the adhesive material is made through the rotation of
at least one element of rotating distribution (3), to which said adhesive material
is fed and which throws by centrifugal force, a nebulization of said adhesive material
on the ply placed at a predetermined distance from it.
2. A method, according to claim 1, wherein the generation of a gaseous flow is foreseen,
hitting the part of the ply placed in front of the element of rotating distribution
(3), preferably during the whole manufacturing process or at least in the case of
block of the ply/plies feeding.
3. A method, according to claim 1 or 2, wherein, during the feeding of the plies, through
suitable detecting means, an analysis of entirety of the plies themselves is comprised,
upstream to the part where the gluing phase takes place.
4. A method, according to one or more of the previous claims, wherein said process of
adhesive material distribution is made through the arrangement of a centrifugal device
(1) comprising a plurality of element of rotating distribution, arranged one close
to the other, in such a manner so as to intercept horizontally the ply in transit.
5. A method, according to one or more of the previous claims, wherein the distance for
the arrangement of each element of rotating distribution (3) with respect to the ply
in transit is selected from a range from 20mme and 25mm.
6. A method, according to one or more of the previous claims, wherein the advancing direction
of the ply in front of said element of rotating distribution (3) is from the top to
the downwards.
7. A method, according to one or more of the previous claims, wherein the adhesive material
fed by the element of rotating distribution (3) is diluted with another liquid, preferably
water
8. A method, according to claim 7, wherein the dilution glue/liquid selected is comprised
in a range from 1:2 to 1:10, preferably 1:5.
9. A method, according to one or more of the previous claims, wherein the rotation speed
of the element of the rotating distribution (3) is adjustable.
10. A method, according to one or more of the previous claims, wherein the rotation speed
of the element of the rotating distribution (3) is comprised between 2400 RPM and
3600 RPM, preferably of 2800 RPM or approximately 3000 RPM.
11. A machinery for the production of a continuous tape with one or more glued plies,
preferably a rewinder, the machinery comprising:
- At least a first feeding path through which at least a first ply (100) can be fed
in the form of a tape;
- At least a second feeding path through which at least a second ply (200) can be
fed in the form of a tape;
- A gluing section (1) to allow the distribution of adhesive material on at least
one of the two plies in transit along its processing path, in such a manner that the
two plies can be coupled each other;
- Characterized in that said gluing section (1) comprises at least one element of rotating distribution (3)
arranged in such a manner that it results to a preset distance from the ply in transit
and to which it is fed in use said adhesive material, in such a manner so as to throw
a nebulization of said adhesive material by centrifugal force.
12. A machinery, according to claim 11, wherein a device for generating a gaseous flow
(50) is comprised, arranged in such a manner that it can hit, with the generated flow,
the part of ply placed in front of the element of the rotating distribution (3).
13. A machinery, according to claim 11 or 12, wherein one or more detecting sensor are
comprised and arranged upstream the gluing section (1) and configured for checking
potential rips or holes in the tape.
14. A machinery, according to one or more previous claims from 11 to 13, wherein the distance
for the arrangement of the element of rotating distribution (3) with respect to the
ply in transit is selected in a rage between 20mm and 25mm.
15. A machinery, according to one or more of the previous claims from 11 to 14, wherein
the direction of the ply in front of said element of rotating distribution (3) is
from the top to the downwards.
16. A machinery, according to one or more of the previous claims from 11 to 15, wherein
at least two rollers are comprised and distanced one from the other, forming the passage
of the tape in front of the element of rotating distribution (3) from the top to the
downwards.
17. A machinery, according to one or more of the previous claims from 11 to 16, wherein
a tank for containing glue, provided with a stirrer and a pumping system to pump adhesive
material to the element of rotating distribution (3) with variable flow rate, are
comprised.
18. A machinery, according to one or more of the previous claims from 11 to 17, wherein
a regulating valve with diameter of approximately 1 mm is comprised for each element
of rotating distribution (3).
19. A machinery, according to one or more of the previous claims from 11 to 18, wherein
the rotation speed of the element of rotating distribution (3) is comprised between
2400 RPM and 3600 RPM, preferably between 2800 RPM and 3000 RPM, more preferably of
2800 RPM.
20. The use of a centrifugal device (1) having at least one element of rotating distribution
(3), through which to sprinkle by centrifugal force a nebulization of an adhesive
material for the formation of a tape with two or more glued plies.
1. Ein Verfahren zur Herstellung eines Bandes mit zwei oder mehr geklebten Lagen, wobei
das Verfahren die folgenden Phasen umfasst:
- Das Zuführen von mindestens einer ersten Lage (100) in Form eines Bandes entlang
eines ersten Verarbeitungsweges;
- Das Zuführen von mindestens einer zweiten Lage (200) in Form eines Bandes entlang
eines zweiten Verarbeitungsweges;
- Die Verteilung des Klebematerials auf mindestens einer der beiden Lagen entlang
des Verarbeitungsweges und das anschließende Übereinanderlegen der beiden genannten
Lagen;
- dadurch gekennzeichnet, dass der Verteilungsprozess des Klebstoffmaterials durch die Rotation mindestens eines
Elementes der rotierenden Verteilung (3) erfolgt, dem das Klebstoffmaterial zugeführt
wird und das durch Zentrifugalkraft eine Zerstäubung des genannten Klebstoffmaterials
auf die in einem vorbestimmten Abstand von ihm angeordnete Lage vornimmt.
2. Ein Verfahren gemäß Anspruch 1, bei dem die Erzeugung einer Gasströmung vorgesehen
ist, die auf den Teil der Lage auftrifft, der vor dem Element der rotierenden Verteilung
(3) angeordnet ist, vorzugsweise während des gesamten Herstellungsprozesses oder zumindest
im Falle einer Blockierung der Zuführung der Lage/der Lagen.
3. Ein Verfahren gemäß Anspruch 1 oder 2, bei dem während der Zuführung der Lagen durch
geeignete Erfassungsmittel eine Analyse der Gesamtheit der Lagen selbst vor dem Teil
durchgeführt wird, in dem die Klebephase stattfindet.
4. Ein Verfahren gemäß einem oder mehreren der vorhergehenden Ansprüche, wobei der Prozess
der Verteilung des Klebstoffmaterials durch die Anordnung einer Zentrifugalvorrichtung
(1) erfolgt, die eine Vielzahl von Elementen der rotierenden Verteilung umfasst, die
nahe beieinander so angeordnet sind, dass sie die durchlaufende Schicht horizontal
abfangen.
5. Ein Verfahren gemäß einem oder mehreren der vorhergehenden Ansprüche, bei dem der
Abstand für die Anordnung jedes Elements der rotierenden Verteilung (3) in Bezug auf
die durchlaufende Lage aus einem Bereich von 20 mm und 25 mm ausgewählt wird.
6. Ein Verfahren gemäß einem oder mehreren der vorhergehenden Ansprüche, bei dem die
Vorschubrichtung der Lage vor dem genannten Element der rotierenden Verteilung (3)
von oben nach unten verläuft.
7. Ein Verfahren gemäß einem oder mehreren der vorhergehenden Ansprüche, bei dem das
durch das Element der rotierenden Verteilung (3) zugeführte Klebstoffmaterial mit
einer anderen Flüssigkeit, vorzugsweise Wasser, verdünnt wird.
8. Ein Verfahren gemäß Anspruch 7, bei dem der ausgewählte Verdünnungsklebstoff/die ausgewählte
Verdünnungsflüssigkeit in einem Verhältnis von 1:2 bis 1:10, vorzugsweise 1:5, enthalten
ist.
9. Ein Verfahren gemäß einem oder mehreren der vorhergehenden Ansprüche, bei dem die
Drehgeschwindigkeit des Elements der rotierenden Verteilung (3) einstellbar ist.
10. Ein Verfahren gemäß einem oder mehreren der vorhergehenden Ansprüche, bei dem die
Drehgeschwindigkeit des Elements der rotierenden Verteilung (3) zwischen 2400 U/min
und 3600 U/min, vorzugsweise 2800 U/min oder ungefähr 3000 U/min, liegt.
11. Eine Maschine zur Herstellung eines Endlosbandes mit einer oder mehreren geklebten
Lagen, vorzugsweise eine Aufwickelmaschine, wobei die Maschine umfasst:
- Mindestens einen ersten Zuführweg, durch den mindestens eine erste Lage (100) in
Form eines Bandes zugeführt werden kann;
- Mindestens einen zweiten Zuführweg, durch den mindestens eine zweite Lage (200)
in Form eines Bandes zugeführt werden kann;
- einen Klebebereich (1), um die Verteilung von Klebematerial auf mindestens einer
der beiden Lagen im Durchlauf entlang seines Verarbeitungsweges zu ermöglichen, und
zwar derart, dass die beiden Lagen miteinander verbunden werden können;
- dadurch gekennzeichnet, dass der Klebebereich (1) mindestens ein Element der rotierenden Verteilung (3) umfasst,
das so angeordnet ist, dass sich ein vorgegebener Abstand von der im Durchlauf befindlichen
Lage ergibt und der es bei Verwendung des genannten Klebematerials zugeführt wird,
und zwar so, dass eine Zerstäubung des genannten Klebematerials durch Zentrifugalkraft
erfolgt.
12. Eine Maschine gemäß Anspruch 11, bei der eine Vorrichtung zur Erzeugung einer Gasströmung
(50) enthalten ist, die so angeordnet ist, dass sie mit der erzeugten Strömung auf
den Teil der Lage treffen kann, der vor dem Element der rotierenden Verteilung (3)
angeordnet ist.
13. Eine Maschine gemäß Anspruch 11 oder 12, bei der ein oder mehrere Erfassungssensoren
vor dem Klebebereich (1) vorgesehen und angeordnet sind und so konfiguriert sind,
dass sie potenzielle Risse oder Löcher im Band überprüfen.
14. Eine Maschine gemäß einem oder mehreren der vorhergehenden Ansprüche 11 bis 13, bei
der der Abstand zur Anordnung des Elements der rotierenden Verteilung (3) in Bezug
auf die durchlaufende Lage in einem Bereich zwischen 20 mm und 25 mm gewählt wird.
15. Eine Maschine gemäß einem oder mehreren der vorhergehenden Ansprüche 11 bis 14, bei
der die Richtung der Lage vor dem genannten Element der rotierenden Verteilung (3)
von oben nach unten verläuft.
16. Eine Maschine gemäß einem oder mehreren der vorhergehenden Ansprüche 11 bis 15, bei
der mindestens zwei voneinander beabstandete Rollen vorhanden sind, die den Durchlauf
des Bandes vor dem Element der rotierenden Verteilung (3) von oben nach unten bilden.
17. Eine Maschine gemäß einem oder mehreren der vorhergehenden Ansprüche 11 bis 16, bei
der ein Behälter zur Aufnahme von Klebstoff enthalten ist, der mit einem Rührer und
einem Pumpsystem zum Pumpen von Klebstoffmaterial zum Element der rotierenden Verteilung
(3) mit variabler Strömungsrate ausgestattet ist.
18. Eine Maschine gemäß einem oder mehreren der vorhergehenden Ansprüche 11 bis 17, bei
der ein Regelventil mit einem Durchmesser von ungefähr 1 mm für jedes Element der
rotierenden Verteilung (3) vorgesehen ist.
19. Eine Maschine gemäß einem oder mehreren der vorhergehenden Ansprüche 11 bis 18c, bei
der die Drehgeschwindigkeit des Elements der rotierenden Verteilung (3) zwischen 2400
U/min und 3600 U/min, vorzugsweise zwischen 2800 U/min und 3000 U/min, noch besser
bei 2800 U/min liegt.
20. Die Verwendung einer Zentrifugalvorrichtung (1) mit mindestens einem Element der rotierenden
Verteilung(3), das durch Zentrifugalkraft die Zerstäubung eines Klebematerials vornimmt,
um ein Band mit zwei oder mehr Klebelagen herzustellen.
1. Procédé de fabrication d'un ruban à deux plis ou plus collés, le procédé comprenant
les phases suivantes :
- alimentation d'au moins un premier pli (100) sous forme de ruban le long d'un premier
chemin de traitement ;
- alimentation d'au moins un second pli (200) sous forme de ruban le long d'un second
chemin de traitement ;
- distribution du matériau adhésif sur au moins l'un des deux plis le long du chemin
de traitement et chevauchement ultérieur desdits deux plis ;
- caractérisé en ce que ledit processus de distribution du matériau adhésif est réalisé par la rotation d'au
moins un élément de distribution par rotation (3), vers lequel ledit matériau adhésif
est alimenté et qui lance par effet de la force centrifuge, une nébulisation dudit
matériau adhésif sur le pli placé à une distance prédéterminée de l'élément.
2. Procédé selon la revendication 1, dans lequel la génération d'un écoulement gazeux
est prévue, frappant la partie du pli placée devant l'élément de distribution par
rotation (3), de préférence pendant tout le processus de fabrication ou au moins en
cas de blocage de l'alimentation du pli ou des plis.
3. Procédé selon la revendication 1 ou 2, dans lequel, lors de l'alimentation des plis,
par des moyens de détection appropriés, une analyse de l'intégralité des plis eux-mêmes
est réalisée, en amont de la partie où se déroule la phase de collage.
4. Procédé selon une ou plusieurs des revendications précédentes, dans lequel ledit processus
de distribution du matériau adhésif est réalisé par l'agencement d'un dispositif centrifuge
(1) comprenant une pluralité d'éléments de distribution par rotation, disposés l'un
à proximité de l'autre, de manière à intercepter horizontalement le pli en transit.
5. Procédé selon une ou plusieurs des revendications précédentes, dans lequel la distance
pour l'agencement de chaque élément de distribution par rotation (3) par rapport au
pli en transit est choisie dans une plage comprise entre 20 mm et 25 mm.
6. Procédé selon une ou plusieurs des revendications précédentes, dans lequel la direction
d'avancement du pli devant ledit élément de distribution par rotation (3) va du haut
vers le bas.
7. Procédé selon une ou plusieurs des revendications précédentes, dans lequel le matériau
adhésif alimenté par l'élément de distribution par rotation (3) est dilué par un autre
liquide, de préférence de l'eau.
8. Procédé selon la revendication 7, dans lequel la colle ou le liquide de dilution sélectionné
est compris dans une plage de 1:2 à 1:10, de préférence 1:5.
9. Procédé selon une ou plusieurs des revendications précédentes, dans lequel la vitesse
de rotation de l'élément de distribution par rotation (3) est réglable.
10. Procédé selon une ou plusieurs des revendications précédentes, dans lequel la vitesse
de rotation de l'élément de distribution par rotation (3) est comprise entre 2400
tr/min et 3600 tr/min, de préférence égale à 2800 tr/min ou à environ 3000 tr/min.
11. Équipement de fabrication d'un ruban à deux plis ou plus collés, comprenant de préférence
un enrouleur, l'équipement comprenant :
- au moins un premier chemin d'alimentation à travers lequel au moins un premier pli
(100) peut être alimenté sous la forme d'un ruban ;
- au moins un second chemin d'alimentation à travers lequel au moins un second pli
(200) peut être alimenté sous la forme d'un ruban ;
- une section de collage (1) pour permettre la distribution de matériau adhésif sur
au moins l'un des deux plis en transit le long de son chemin de traitement, de telle
manière que les deux plis puissent être couplés l'un à l'autre ;
- caractérisé en ce que ladite section de collage (1) comprend au moins un élément de distribution par rotation
(3) agencé de manière à ce qu'il se trouve à une distance prédéfinie du pli en transit
et vers lequel il est alimenté lors de l'utilisation dudit matériau adhésif, de manière
à provoquer une nébulisation dudit matériau adhésif par effet de la force centrifuge.
12. Équipement selon la revendication 11, comprenant un dispositif pour générer un écoulement
gazeux (50), agencé de manière à pouvoir frapper, avec l'écoulement généré, la partie
du pli placée devant l'élément de distribution par rotation (3).
13. Équipement selon la revendication 11 ou 12, dans lequel un ou plusieurs capteurs de
détection sont compris et disposés en amont de la section de collage (1) et configurés
pour vérifier les déchirures ou les trous potentiels du ruban.
14. Équipement, selon une ou plusieurs des revendications précédentes 11 à 13, dans lequel
la distance pour l'agencement de chaque élément de distribution par rotation (3) par
rapport au pli en transit est choisie dans une plage comprise entre 20 mm et 25 mm.
15. Équipement, selon une ou plusieurs des revendications précédentes 11 à 14, dans lequel
la direction d'avancement du pli devant ledit élément de distribution par rotation
(3) va du haut vers le bas.
16. Équipement, selon une ou plusieurs des revendications précédentes 11 à 15, comprenant
au moins deux rouleaux distants l'un de l'autre, formant le passage du ruban devant
l'élément de distribution par rotation (3) du haut vers le bas.
17. Équipement, selon une ou plusieurs des revendications précédentes 11 à 16, comprenant
un réservoir pour contenir de la colle, pourvu d'un agitateur et d'un système de pompage
pour pomper le matériau adhésif vers l'élément de distribution par rotation (3) à
une vitesse d'écoulement variable.
18. Équipement, selon une ou plusieurs des revendications précédentes 11 à 17, comprenant
une vanne de régulation d'un diamètre d'environ 1 mm pour chaque élément de distribution
par rotation (3).
19. Équipement, selon une ou plusieurs des revendications précédentes 11 à 18, dans lequel
la vitesse de rotation de l'élément de distribution par rotation (3) est comprise
entre 2400 tr/min et 3600 tr/min, de préférence comprise entre 2800 tr/min et 3000
tr/min et de façon plus préférentielle égale à 2800 tr/min.
20. Utilisation d'un dispositif centrifuge (1) comportant au moins un élément de distribution
par rotation (3), à travers lequel on peut former par la force centrifuge une nébulisation
d'un matériau adhésif pour la formation d'un ruban avec deux ou plusieurs plis collés.