EP1038817A2 - Method and device for leading a web onto a roller - Google Patents

Abstract

The method for feeding a web of paper or cardboard to an empty or partially filled drum (10) comprises first feeding a strip (3) of the web over the top of a carrier roll, then through the gap in a guide (8) towards a waste container (9). After the desired width of web has passed the drum is moved to form a nip with the carrier roll. The web is then cut and winding on to the drum is begun. An Independent claim is included for a winding machine for carrying out the process.

Description

The invention relates to a method for threading a material web, in particular Paper or cardboard web, on a reel, especially on an empty or partially wound one Drum, according to the preamble of claim 1 and a winding machine for feeding a material web, in particular paper or cardboard web, on a drum, especially on an empty or partially wound drum, according to the preamble of claim 19.

Such a introduction of a material web onto a drum is, for example, at the beginning a new winding process with a new, yet unwound drum ("Empty reel") or to continue a winding process that has already started an unwanted or caused web break with an already partially wound Drum required.

It is well known that from a machine for manufacturing or finishing a material web coming and over part of the circumference of the support drum performed performance strips, for example the edge strip of the material web, immediately perform the drum forming a winding nip with the carrying drum. Only after the threading strip is widened to the full width of the material web. By the Immediate performance of the performance strip on the drum creates a so-called "Winding carrot" with uneven distribution of web tension at least in Winding core. Thus there is the disadvantage that the initially wound part of the Material web are rejected as rejects when rewinding the material web got to. It can also, for example, after a shutdown of the manufacturing or Finishing machine, the material web may not initially have the desired one Has quality and / or production characteristics. In this case it is undesirable to wind up the non-salable part of the material web instead of it to be paid off immediately as a committee.

Pulper") zugeführt. Verschiedenartige Ausschußbehälter sind aus zahlreichen Veröffentlichungen, beispielsweise aus der europäischen Patentschrift EP 0 664 267 B1 (PR10037 EP) der Anmelderin, aus der nicht vorveröffentlichten deutschen Patentanmeldung DE 197 44 505.5 (PR10619 DE) der Anmelderin und aus dem Sonderdruck aus dem "Wochenblatt für Papierfabrikation" 123, 1995, Nr. 4, Seite 5. Nach dem Breitfahren des Aufführstreifens unter kontinuierlichem Abführen desselben in den Ausschußbehälter wird die jetzt in voller Breite ankommende Materialbahn durchgetrennt und erst danach auf den Tambour aufgeführt.In order to prevent the formation of a "wrap-around carrot" and to guide the material web onto the reel only after the desired quality and / or production characteristics have been met, as is also generally known, the leader strip extends over part of the circumference of the carrier drum upstream of the reel a reject container (

Various types of reject containers are known from numerous publications, for example from the applicant's European patent EP 0 664 267 B1 (PR10037 EP), from the applicant's unpublished German patent application DE 197 44 505.5 (PR10619 DE) and from the special print the "Wochenblatt für Papierfabrikation" 123, 1995, No. 4, page 5. After the spreading tape has been spread out while continuously discharging it into the reject container, the material web, which is now arriving in its full width, is severed and only then fed onto the reel.

The problem that arises with such a method is that the leader tape or the material web has the tendency to move forward unintentionally performing the cutting on the drum itself ("self-performance"). The tendency of the performance strip to perform itself The material web is affected by various factors, for example the nip geometry, the surface shape or the proportion of open areas, the reference hardness, nip force and paper properties. In addition, this problem occurs intensifies at high web speeds.

It has therefore already been attempted to solve this problem in that, as in European patent EP 0 658 504 B1, which precedes the drum Carrier drum is designed as a suction drum, so in the drum Vacuum is generated, the corresponding openings in the drum on the Material web acts and holds it to the drum. This allows self-performance the material web on the drum can be largely avoided. By the negative pressure in the carrier drum, however, becomes the decrease in the web for discharge difficult in the reject container.

Furthermore, the unpublished German patent application DE 198 48 816.5 (PR10786 DE) from the applicant a winding machine for winding a Material web proposed on a reel, in which the over an infeed roller fed material web together with a perforated support band over an absorbable Carried drum and between the drum and the reel Winding gap is formed. The support band is connected to the drum guided over an outlet roller, which is arranged in the region of a reject resolver is in which the performance of the material web or the entire material web before a later performance on the drum. One is also perforated Carrying drum with jacket and / or with circumferential grooves in its part not wrapped by the perforated support band and the material web the circumference sucked from the outside. This device can also be self-performing Avoid the web of material on the reel, but it is subject to perforation Support band wear and must therefore be replaced at certain time intervals. Also brings the suction of the carrier drum, which is expensive in terms of production costs with a perforated jacket and / or with circumferential grooves increased running costs with yourself.

Furthermore, with regard to the prior art, reference is also made to that which has likewise not been previously published German patent application DE 198 48 806.8 (PR10783 DE) of the applicant. This patent application discloses a method for threading a web of material on a drum where the beginning of the material web to be performed led around a drum upstream of the drum and before the performance on the drum of a preparation station such as a reject breaker is fed. The material web is placed on the Keep the drum away from the drum by blowing air. A device is also disclosed to carry out the method with a transverse to the web direction Blow bar with at least one outlet opening for the blowing air, means for Supply of blown air to the blow bar and control means for controlling the introduction of blowing air. This method and this device can also be used Self-introduction of the material web on the drum can be largely avoided. however, the need for blowing air brings increased investment costs and high running costs for the disclosed device.

The invention is therefore based on the object of a method of the type mentioned Kind in such a way that the performance strip or the web of material first reliably and in a controlled manner up to the reject container and that a self-performance of the threading strip or the material web prevented as far as possible on the drum regardless of its respective position without taking the web from the upstream of the reel To complicate carrying drum. In addition, a suitable device for carrying out of the procedure.

To achieve this object, a method for performing a material web, in particular a paper or cardboard web, on a reel, especially one empty or partially wound drum, proposed that those mentioned in claim 1 Features. The procedure provides that the leader strip over a part of the circumference of the support drum is guided and then through the Effective area of a guide device is guided towards the reject container. Now the threading strip is up to a desired width of the material web spread out. Then the drum is attached to the drum with the formation of a nip created between the drum and the drum. Finally, the web of material severed and with the winding of the material web into a winding roll started on the drum. The method described above for threading a material web onto a drum, especially an empty or partially wound drum, is performed every time a web of material repeated.

A first further embodiment of the invention provides that before the approach of the lead strip is arranged on the drum of the drum in such a way that There must be a radial distance of at least 1 between the drum and the drum mm. This effectively ensures that the leader tape is in place or does not perform the material web itself on the reel.

Another embodiment of the invention provides that the effective range is non-contact, for example by at least one air stream or at least one water jet, is trained. This has the advantage that there are no signs of wear due to a possible contact between the performance strip respectively the material web and the device for performing the method occur.

Another embodiment of the invention provides that the effective range with touch, for example by at least one roller or at least one guide belt, is trained. This makes it possible for the lead strip or the material web is controlled and controllable by the device for performing the Procedure can be performed.

An embodiment of the invention provides that the effective range acting on one side the lead strip or the material web is formed. By means of this one-sided effect, the advantage is achieved that the device for performing the Process can be carried out inexpensively and efficiently.

In a preferred embodiment of the invention, the effective range is effective on both sides the performance strip or the material web is formed. So that becomes a symmetrical and reliable guidance of the lanyard respectively the material web guaranteed.

Another embodiment of the invention provides that the effective range in different, perpendicular to the direction of movement of the lead strip or the layers of material acting on the performance strip or the Material web is formed. This ensures that the lead strip or the material web is guided reliably over a longer distance becomes.

The at least two planes of the effective range acting on both sides are preferred formed on the lead strip or the web of material offset from one another. This has the advantage that the targeted deflection of the leader strip or the material web enables more controlled guidance becomes.

In a preferred embodiment of the invention, the threading strip is released or the material web from the support drum by a blade and / or Air scrapers as these types of scrapers have proven to be very reliable in the past have proven in terms of their function and inexpensive. The loosening of the lead strip or web of material from the support drum further by forming an overpressure zone in the support drum, which with Holes are provided. This formation of an overpressure zone in the carrier drum brings with it the advantage that to detach the leader or the material web does not contact the outer surface of the carrier drum Element is present which has an abrasive effect on the outer surface owns.

Another advantageous embodiment of the invention is when the widening of the Application strip up to a desired width of the material web by means of a Tip cutter is done. This has the advantage of cutting on Performance strips with the highest precision in terms of cut quality and the like perform.

According to a particularly advantageous embodiment of the invention, it is provided that the desired width of the material web is the entire web width. This enables that at the beginning of the winding of the material web to a winding roll the reel from the very beginning a uniform winding across the reel width with the same increase in diameter. It is the emergence of a so-called "Wrapped carrot" completely avoided.

According to a further embodiment of the invention, the material web is severed passive and / or active. The passive severing can, for example by self-separation by means of a loop, the active separation, for example by means of a gooseneck, an IBS tape or a water jet take place because all the types mentioned are characterized by high reliability, precision and Mark up cost advantages. The active means of cutting the material web now belong to the state of the art and are, for example, in the European Patent application EP 0 089 304 A1, in the international patent application WO 92/06913 and in the unpublished German patent application DE 198 48 810.6 (PR10788 DE) of the applicant. The content of these Writings are hereby made the subject of this description.

The material web is preferably only cut after it has at least been cut fulfills a desired quality characteristic and / or production characteristic. Desired Quality features of the material web are, for example, the surface roughness, the shrink cross profile and fiber orientation, whereas desired Production characteristics of the material web, for example the web speed, the web width or the production quantity.

In a further advantageous embodiment of the invention it is provided that before the approach of the lead strip to the support drum at least one pressure element to the carrying drum, especially in the area of the running path of the application strip via the carrier drum, with the formation of an effective range, for example a pressure gap, a pressure surface or a blowing zone between the support drum and the pressure element is applied. This has the advantage that a Self-performance of the threading strip or the material web on the Barrier prevented as far as possible regardless of its respective position without taking off the web from the drum upstream of the drum to complicate. With regard to further procedural aspects for creating the Pressure element on the carrier drum is on the unpublished German Patent application 199 07 550.6 (PR10846 DE) of the applicant; their content is hereby made the subject of this description

An embodiment of the invention provides that after the start of winding the web of material to a winding roll on the spool the pressure element of the Carrying drum is put down. This ensures that the drive power for the Carrier drum kept to minimum values, the respective operation can be and also the surface wear on both the drum and also reduced on the pressure element due to the absence of an effective range becomes.

To solve the problem is also a winding machine with the features of the claim 19 proposed. Here, the winding machine has at least one between the carrying drum and the reject container arranged guiding device for the material web, whereby the threading strip or the material web is safely led into the reject container.

A first embodiment of the invention provides that the guide device immediately is arranged in front of the reject container. This has the advantage that the Performance strips or the material web over the largest possible area is safely led into the reject container.

In a further embodiment of the invention, the guide device has a width of 1000 mm, preferably 750 mm, transverse to the direction of movement of the leader strip. This width is perfectly sufficient to allow the tape to be self-threading or to prevent the material web. Preferred by this Width, which is also much smaller than the machine width, can be also effectively design the manufacturing costs of the pressure element. They are also running operating costs for the pressure element lower.

It is also advantageous if the guide device extends over the entire width of the material web. This advantage is particularly evident when the basis weight of the material web assumes values of over 80 g / m ² . This configuration then ensures that the "heavy" material web is guided over the entire width.

It is also advantageous if the guide device as a pair of rollers, preferably as segmented and offset roller pair, suitable surface quality is trained. Due to the segmentation of the roller, both achieved advantages in terms of friction and strength. Preferably one is Roll designed as a driven roller. This leads to a minimum possible surface friction between the leader or the Material web and the guide device.

It is also advantageous if the guide device as a pair of rollers with at least one perforated and pressurized roller is formed. Through this Design is made possible that the threading strip or the material web under the action of adhesive forces in the guide device safely into the reject container to be led. It is also an advantage if one roller is perforated and applied with vacuum and the other roller with a rubber coating is executed. As a result, in addition to the adhesive forces, there are also frictional forces whereby the guidance of the threading strip or the material web is made even safer and more effective.

In a further embodiment, the guide device is driven as at least two Leading bands trained. Due to the constructive design of the guide bands with a Guide length from 100 to 500 mm, preferably from 200 to 300 mm, and a guide width from 50 to 100 mm, preferably from 70 to 80 mm, the functionally reliable and low-wear guidance of the threading strip or the material web reached through the guide into the reject container. Advantageous is furthermore that the performance strip or the material web is not only in a nip or in a short area, but in a route with sufficient lead length. Several are preferred adjacent guiding tapes with a distance of 20 to 50 mm, preferably 25 to 40 mm, used, which continue to the opposite lead bands offset, that is, on gap, are arranged. By using multiple Leading belts reduce the belt costs and wear-related replacement individual bands possible; due to the staggered arrangement the Guiding the threading strip or the material web even safer and is made more effective

Another embodiment of the invention provides that the guide device as one of is formed a fluid flow line system, the power system is provided with outlet openings such that the fluid in the direction of movement the performance strip or the material web under the last Touches the leader or the material web emerges. The described design of the line system makes it wear-free Working guiding device trained, which in turn a safe guidance of the lead strip or the material web. In a further embodiment is the pipe system on both sides of the threading strip or the material web attached, which allows an almost symmetrical guidance. The outlet openings of the line system are advantageously in different, perpendicular to the direction of movement of the threading strip or the material web acting levels arranged. This will guide the leader strip or the material web with a minimum number of outlet openings made possible over a longer guide length. In a further embodiment of the Invention, the outlet angle of the outlet openings of the line system are adjustable with the advantage that the on the leader or the web acting forces can be optimized. As fluid flows through the pipe system advantageously water or air used. Both fluids guarantee functional reliability of the piping system with reasonable costs at an additional Adjustment of the pressure of the fluid flowing through the line system.

An advantageous embodiment of the invention provides that the guide device as a guiding surface, which consists of an endless and rotating between two rollers formed on the side facing the guide surface with a vacuum is trained. The guide surface has the advantage that the lead strip or the material web with low investment and operating costs is guided safely and effectively into the reject container. At least one is preferred a roller driven, whereby the operating speed can be precisely controlled and can be optimized.

In a further preferred embodiment, the negative or positive pressure is generated Common facilities that the generated sub- respectively Overpressure is adjustable. This is the optimization of operating costs under consideration that enables functional reliability.

In a preferred embodiment of the invention, the guide device is at least one Scraper formed, which acts on the support drum and with at least one blowing nozzle, which the performance strip or the material web in its or their direction of movement is pressurized. This has the advantage that the flawless by the at least one scraper Detachment of the transfer strip or the material web from the Carrier drum and through the at least one blowing nozzle the safe transport of the leader or the material web ensured in the reject container is, that is, the functional reliability of the control system and the runnability of the Wrapping machine of paper or board machine is guaranteed. It also follows the advantage that no further assembly is installed in the winding machine must, since there is usually a scraper acting on the carrying drum. According to the invention this existing scraper is only modified.

In a further embodiment of the invention, the scraper has a width of 1000 mm, preferably of 750 mm, transverse to the direction of movement of the threading strip. This width is perfectly sufficient to allow the tape to be self-threading or to prevent the material web. By this preferred width, the Furthermore, the manufacturing costs can be significantly smaller than the machine width of the scraper effectively. In addition, the ongoing operating costs for the scraper less.

It is also advantageous if the scraper extends over the entire width of the material web. This advantage is particularly evident when the basis weight of the material web assumes values of over 80 g / m ² . This configuration then ensures that the "heavy" material web is guided over the entire width.

With regard to the mode of operation of the scraper, it is also advantageous if it has a large number of blowing nozzles distributed over its length, which in a further embodiment of the Invention are divided into at least two sections, preferably with different Pressures can be applied. This ensures that the as a guide acting scraper best meet the requirements placed on it can be. For example, during the performance of the material web only apply pressure to the section touched by the leader be, which in turn saves costs and increases process reliability results. The pressure acting here generally takes a value between 1 and 5 bar, preferably between 1.5 and 3 bar. It goes without saying that the sections also have different section widths, preferably between 0.7 and 1.5 m. Of course, the number of blow nozzles can also vary Section vary, generally 3 to 10 blowing nozzles, preferably 4 to 8 Blow nozzles, used for each section.

In a further advantageous embodiment of the invention it is provided that the Winding machine has at least one pressing element which can be placed on the carrying drum. This has the advantage that the threading strip is self-threading or the material web on the drum regardless of its respective Position is prevented as far as possible, without thereby reducing the web difficult from the drum upstream of the drum. With regard to the The design of the pressure element is based on the unpublished German Patent application 199 07 550.6 (PR10846 DE) of the applicant; their content is hereby made the subject of this description

It is understood that the foregoing and those yet to be explained Features of the invention not only in the specified combination, but can also be used in other combinations or alone, without the Leave the scope of the invention.

Further features and advantages of the invention emerge from the subclaims and the following description of preferred exemplary embodiments with reference on the drawings.

Figur 1:

eine Seitenansicht einer Wickelmaschine während des Wickelvorgangs;

Figur 2:

eine Seitenansicht einer Wickelmaschine mit erfindungsgemäßer Vorrichtung zum Verhindern eines Selbstaufführens der Materialbahn;

Figuren 3a, 3b, 4, 5, 6a, 6b, 7, 8, 9a und 9b:

vereinfachte Darstellungen von erfindungsgemäßen Leiteinrichtungen.

The invention will be explained in more detail below with reference to the drawings. They represent:

Figure 1:

a side view of a winding machine during the winding process;

Figure 2:

a side view of a winding machine with an inventive device for preventing self-introduction of the material web;

Figures 3a, 3b, 4, 5, 6a, 6b, 7, 8, 9a and 9b:

simplified representations of control devices according to the invention.

The winding machine 1 shown in FIG. 1 in a highly schematic form comprises a support drum 2, also referred to as a pressure drum or back-up roller, which is either rigidly mounted or can be displaced along an imaginary horizontal line G shown in dashed lines by means of a pressure device (not shown) and by a drive shown in FIG Case driven by a center drive. The various types of storage for the carrier drum 2 are disclosed in particular in the not previously published German patent application DE 198 07 897.8 (PR10678 DE) of the applicant; the content of which is hereby made the subject of this description. The material web 4 is either led out of a smoothing unit, not shown here, or also a drying section of a paper or board machine, which is also not shown here, then initially wraps around a spreader roller, also not shown, and then runs in the direction of the arrow on the lateral surface 5 of the carrying drum 2, wraps around it Lateral surface 5 of the support drum 2 by a certain angle ( Wrapping length ") to the nip N present between the carrying drum 2 and the winding roller 6 and is finally wound onto the winding roller 6. The winding roller 6 is displaced in the direction of the arrow in accordance with its diameter increase. The displacement device for the winding roller 6 is in the already mentioned, not previously published German patent application DE 198 07 897.8 (PR10678 DE) by the applicant The winding machine 1 furthermore also comprises a drum 10, which is empty in the illustrated case, which, after fulfilling certain criteria, is applied to the carrier drum 2 to form a winding gap between the carrier drum 2 and the drum 10. A method for a complete reel change is also disclosed in the applicant's previously mentioned, not previously published German patent application DE 198 07 897.8 (PR10678 DE).

In Figure 2, the winding machine 1 is in a highly schematic form during the reel change shown, in addition to the components shown in Figure 1 another scraper 7, a guide device 8 and a reject container 9 in the lower Area of the winding machine 1 are shown.

The function of the winding machine and the method according to the invention are described below for guiding a material web, in particular a paper or cardboard web, on a drum, especially an empty or partially wound drum, are explained using a performance process: The lead strip 3 is in a known manner through the areas not shown passed through the paper or board machine, for example by means of the use of so-called pull ropes. Before the performance strip to be performed 3 reaches the carrying drum 2, the drum 10, which may have already been accelerated, becomes such arranged that a radial distance between the support drum 2 and the drum 10 A of at least 1 mm. Then the thread 3 is a Part of the circumference of the support drum 2 and then through the scraper 7th detached from the support drum 2. Now the threading strip 3 becomes the effective area W of the guide device 8 in the direction of the reject container 9 and up to a desired width of the web of material 4. Then the drum 10 to the carrier drum 2 with formation of a nip N between the carrier drum 2 and the drum 10. Finally, the material web 4 is cut and with the winding of the material web 4 into a winding roll 6 on the drum 10 began.

It goes without saying that that shown in Figure 2 in a highly schematic form Winding machine 1 also a partially wound drum 10 on a not shown, in an extension of the horizontal straight line G bearing device a drive, for example a center drive, could be wound and the inventive method and the inventive device also for Performing a material web on this partially wound drum 10 can be realized could.

Figures 3a, 3b, 4, 5, 6a, 6b, 7, 8, 9a and 9b show simplified representations of Control devices according to the invention.

FIG. 3a shows a guide device 8 arranged above the reject container 9, which leads the threading strip 3 or the material web 4 into the same. The control device 8 is formed from a pair of rollers 11, preferably as a segmented and mutually offset pair of rollers 11 with a suitable surface finish is trained. Figure 3b shows the top view of that shown in Figure 3a Guide device 8. It can be seen that the roller pairs 11 are arranged in series are and the rollers 12 of a pair of rollers 11 of a guide side by a common Drive device, for example an electric motor 13 including a control, are driven.

FIG. 4 also shows a guide device arranged above the reject container 9 8, which leads the threading strip 3 or the material web 4 into the same. The control device 8 is made of a pair of rollers 11 with at least one perforated and Negative pressure roller 12 formed. The existing in the roller 12 and adjustable vacuum is by means of a vacuum pump 14 and one, not shown Drive device, for example an electric motor including control, generated. In the present figure, both rollers 12 are subjected to negative pressure. In the corresponding figure 5, the roller 12 is perforated and adjustable Vacuum applied and the other roller 15 with a rubber coating 16th Mistake.

In FIG. 6a, the guide device 8 is designed as two driven guide belts 17, which each circulate between two rollers 18, 19 and with which to the reject container 9th directed side each have a guide surface 20 for the lead strip 3 or the Form material web 4. The rollers 19 are driven by drive devices, not shown, for example, electric motors with controls. The figure 6b shows the sectional view of the guide surface 20 of FIG. 6a. The respective guide surface 20 of a guide device 8 consists of several, at a distance S next to each other arranged and driven guide bands 17 with a respective guide width B and a respective guide length L, which extends across a larger guide width Direction of movement of the threading strip 3 or the material web 4 extends.

FIG. 7 shows the guide device 8 as one of a fluid 21, for example Water or air, flow through the pipe system 22. The pipe 8 consists of four line systems 22, two line systems 22 each in two rows same side of the lead strip 3 or the material web 4 guided into the reject container 9 is attached and the two rows of line systems 22 are fixed in two planes E. The Line systems 22 are at their lead-through strips 3 and to the side of the material web 4 which is directed through and has opening openings 23 different outlet size for the fluid 21 provided. It goes without saying that the line systems 22 can also be attached offset to one another. The outlet angles α of the outlet openings 23 of the line systems 22 are individual adjustable. The fluid 21 is by means of fluid pumps 24 and associated, not shown Drive devices through hollow body 25, for example pipes or Hoses brought to the respective line systems 22. The speeds of the Fluid pumps 24 are individually controllable by a control, not shown, that means both the pressures prevailing in the line systems 22 and the outlet velocities the fluids 21 from the line systems 22 can be determined in certain Limits vary.

In FIG. 8, the guide device 8 is designed as a guide surface 20, which is formed by an endless, between two rollers 18, 19 and a suction housing 26 rotating and on the applied to the guide surface 20 facing side with adjustable vacuum Band 27 is formed, formed, the roller 19 by a not shown Drive device, for example an electric motor including control, driven and the roller 18 is driven. The existing and adjustable in the suction housing 26 Vacuum is created by means of a vacuum pump 14 and a drive device, not shown, for example, an electric motor including control. The performance strip 3 or the material web 4 is by means of the belt 27 prevailing negative pressure along the guide surface 20 into the reject container 9.

FIG. 9a shows a carrier drum 2 which is shown in part. The guide strip 3 or the material web 4 is guided over part of the lateral surface 5 of the carrier drum 2. The threading strip 3 or the material web 4 is detached from the lateral surface 5 of the carrier drum 2 by means of a scraper 29. At least one blowing nozzle 30 is attached to the scraper 29 on the side facing the threading strip 3 or the material web 4, which pressurizes the threading strip 3 or the material web 4 with a pressure p _n , generated by the fluid pump 24, and thereby reliably guides it into the reject container 9 . As a result, the scraper 29 acts as a guide device 8 according to the invention. The scraper 29 can have a width of 1000 mm, preferably 750 mm, transverse to the direction of movement of the application strip 3, but it can also extend over the entire width of the material web 4. The scraper can also have a plurality of blowing nozzles 30 distributed over its length L ', which in turn are divided into sections K1, K2, which in turn can have different widths and different pressures p _n . Furthermore, FIG. 9a shows a pressing element 28 which can be placed on the carrying drum 2. With regard to the design of the pressing element 28, reference is made to the applicant's unpublished German patent application 199 07 550.6 (PR10846 DE); the content of which is hereby made the subject of this description. FIG. 9b shows a front view of the scraper 29. It can clearly be seen that the scraper 29 has a plurality of blowing nozzles 30 distributed over the length L ', which are divided into sections K1, K2.

All of the mentioned control systems only represent a selection of possible control systems represents.

In summary, it should be noted that the invention a method and Device for threading a material web on a drum is created with which the threading strip or the material web first into the reject container reliably guided and a self-performance of the lanyard respectively the web of material on the drum regardless of its respective Position is prevented as far as possible, without thereby the web acceptance before the to complicate the drum upstream of the drum.

Reference list

1

Winding machine

2nd

Carrier drum

3rd

Performance strips

4th

Material web

5

Lateral surface

6

Winding roll

7, 29

scraper

8th

Control device

9

Reject container

10th

Drum

11

Pair of rollers

12th

roller

13

Electric motor

14

Vacuum pump

15

roller

16

Rubber coating

17th

Guideline

18th

roller

19th

Roller, driven

20th

Guide surface

21

Fluid

22

Pipe system

23

Outlet opening

24th

Fluid pump

25th

Hollow body

26

Suction housing

27

tape

28

Pressing element

30th

Blow nozzle

A

Radial distance

B

Guide width

E

level

K1, K2

section

L

Guide length

L '

length

N

Nip

p _n

print

S

distance

W

Effective range

α

Exit angle

Claims (47)

Method for threading a material web (4), in particular paper or cardboard web, onto a reel (10), in particular onto an empty or partially wound reel (10), first of all a threading strip (3) of the material web (4) via a carrying drum (2 ), in particular over the upper part of the circumference of the carrying drum (2), into a reject container (9),
characterized by the following process steps: a, guiding the lead strip (3) over part of the circumference of the support drum (2); b, guiding the lead strip (3) through the effective area (W) of a guide device (8) towards the reject container (9); c, spreading the threading strip (3) up to a desired width of the material web (4); d, applying the drum (10) to the support drum (2) with the formation of a nip (N) between the support drum (2) and the drum (10); e, severing the material web (4) and starting to wind up the material web (4) on the reel (10) to form a winding roll (6). Method according to claim 1,
characterized in that Before the lead strip (3) is brought up to the carrying drum (2), the drum (10) is arranged in such a way that there is a radial distance (A) of at least 1 mm between the carrying drum (2) and the drum (10). The method of claim 1 or 2,
characterized in that the effective range (W) is formed without contact, for example by at least one air stream or at least one water jet. The method of claim 1 or 2,
characterized in that the effective area (W) is formed in contact, for example by at least one roller (12) or at least one guide belt (17). Method according to one of the preceding claims,
characterized in that the effective area (W) is designed to act on one side on the threading strip (3) or the material web (4). Method according to one of claims 1 to 4,
characterized in that the effective area (W) is designed to act on both sides of the threading strip (3) or the material web (4). Method according to one of the preceding claims,
characterized in that the effective area (W) is formed in different planes (E) acting perpendicular to the direction of movement of the threading strip (3) or the material web (4) on the threading strip (3) or the material web (4). Process according to claims 6 and 7,
characterized in that the at least two planes (E) of the effective area (W) acting on both sides on the threading strip (3) or the material web (4) are offset from one another. Method according to one of the preceding claims,
characterized in that the guide strip (3) is detached from the carrying drum (2) by a scraper (7), in particular by a blade and / or air scraper. Method according to one of the preceding claims,
characterized in that the release strip (3) is detached from the carrying drum (2) by forming an overpressure zone in the carrying drum (2) which is provided with bores. Method according to one of the preceding claims,
characterized in that the guide strip (3) is spread out to a desired width of the material web (4) by means of a tip cutter. Method according to one of the preceding claims,
characterized in that the desired width of the material web (4) is the entire web width. Method according to one of the preceding claims,
characterized in that the material web (4) is cut passively, for example by self-separation by means of a loop, and / or actively, for example by means of a gooseneck, an IBS belt or a water jet. Method according to one of the preceding claims,
characterized in that the material web (4) is cut after it has fulfilled at least one desired quality feature and / or production feature. The method of claim 14
characterized in that the at least one quality feature of the material web (4) is the surface roughness, the shrinkage cross profile or the fiber orientation. The method of claim 14
characterized in that the at least one production feature of the material web (4) is the web speed, the web width or the production quantity. Method according to one of the preceding claims,
characterized in that Before the lead strip (3) is brought up to the carrying drum (2), at least one pressing element (28) on the carrying drum (2), in particular in the region of the path of the leading strip (3) over the carrying drum (2), with the formation of an effective area (W ), for example a pressure gap, a pressure surface or a blowing zone, is applied between the support drum (2) and the pressure element (28). A method according to claim 17,
characterized in that after the start of the winding of the material web (4) into a winding roll (6) on the reel (10), the pressing element (28) is deposited by the carrying drum (2). Winding machine (1) for feeding a material web (4), in particular paper or cardboard web, onto a reel (10), in particular an empty or partially wound reel (10), with a carrying drum (2) partially wrapped around the material web (4), which can form a nip (N) during a winding process with a winding roller (6) and with a reject container (9) arranged downstream of the carrying drum (2) in the direction of movement of the material web (4),
characterized in that the winding machine (1) has at least one guide device (8) for the material web (4) arranged between the carrying drum (2) and the reject container (9). Winding machine (1) according to claim 19,
characterized in that the guide device (8) is arranged directly in front of the reject container (9). Winding machine (1) according to claim 19 or 20,
characterized in that the guide device (8) has a width of 1000 mm, preferably 750 mm, transverse to the direction of movement of the threading strip (3). Winding machine (1) according to claim 19 or 20,
characterized in that the guide device (8) extends over the entire width of the material web (4). Winding machine (1) according to one of claims 19 to 22,
characterized in that the guide device (8) is designed as a pair of rollers (11), preferably as a segmented pair of rollers (11) offset from one another, with a suitable surface finish. Winder (1) according to claim 23,
characterized in that at least one roller (12) of the roller pair (11) is designed as a driven roller (12). Winding machine (1) according to one of claims 19 to 22,
characterized in that the guide device (8) is designed as a pair of rollers (11) with at least one perforated roller (12) to which vacuum is applied. Winding machine (1) according to claim 25,
characterized in that the guide device (8) is designed as a pair of rollers (11) with a perforated roller (12) to which vacuum is applied and with a rubberized roller (15). Winding machine (1) according to one of claims 19 to 22,
characterized in that the guide device (8) is designed as at least two driven guide belts (17). Winding machine (1) according to claim 27,
characterized in that the guide band (17) has a guide length (L) of 100 to 500 mm, preferably 200 to 300 mm. Winder (1) according to claim 27 or 28,
characterized in that the guide band (17) has a guide width (B) of 50 to 100 mm, preferably 70 to 80 mm. Winding machine (1) according to one of claims 27 to 29,
characterized in that the distance (S) from two adjacent guide bands (17) is 20 to 50 mm, preferably 25 to 40 mm, and the guide bands (17) are arranged offset to the opposite guide bands (17). Winding machine (1) according to one of claims 19 to 22,
characterized in that the guide device (8) is designed as a line system (22) through which a fluid (21) flows, the power system (22) being provided with outlet openings (23) such that the fluid (21) in the direction of the direction of movement of the application strip (3 ) or the material web (4) with final contact with the threading strip (3) or the material web (4). Winding machine (1) according to claim 31,
characterized in that the line system (8) is attached on both sides of the application strip (3) or the material web (4). Winding machine (1) according to claim 32,
characterized in that that the outlet openings (23) of the line system (22) are arranged in different planes (E) acting perpendicular to the direction of movement of the threading strip (3) or the material web (4). Winding machine (1) according to one of claims 31 to 33,
characterized in that the outlet angles (α) of the outlet openings (23) of the line system (24) are adjustable. Winding machine (1) according to one of claims 31 to 34,
characterized in that water (21) flowing through the line system (22) is used. Winding machine (1) according to one of claims 31 to 34,
characterized in that air (21) flowing through the line system (22) is used. Winder (1) according to claim 35 or 36,
characterized in that the pressure of the fluid (21) flowing through the line system (22) is adjustable. Winding machine (1) according to one of claims 19 to 22,
characterized in that the guide device (8) is designed as a guide surface (20) which is formed by an endless belt (27) which rotates between two rollers (18, 19) and is pressurized on the side facing the guide surface (20). Winder (1) according to claim 38,
characterized in that at least one roller (19) is driven. Winder (1) according to claim 25, 26, 37 or 38,
characterized in that the negative or positive pressure generated is adjustable. Winding machine (1) according to claim 19,
characterized in that the guide device (8) is designed as at least one scraper (29), which acts on the carrying drum (2) and with at least one blowing nozzle (30), which carries the leading strip (3) or the material web (4) in its or its direction of movement pressurized (p _n ). Winding machine (1) according to claim 41,
characterized in that the scraper (29) has a width of 1000 mm, preferably 750 mm, transverse to the direction of movement of the application strip (3). Winding machine (1) according to claim 41,
characterized in that the scraper (29) extends over the entire width of the material web (4). Winding machine (1) according to one of claims 41 to 43,
characterized in that the scraper (29) has a plurality of blow nozzles (30) distributed over its length (L '). Winding machine (1) according to claim 44,
characterized in that the plurality of blowing nozzles (30) distributed over the length (L ') of the scraper (29) are divided into at least two sections (K1, K2), which can preferably be acted upon with different pressures (p _n ). Winding machine (1) according to one of claims 41 to 45,
characterized in that the pressure (p _n ) assumes a value between 1 and 5 bar, preferably between 1.5 and 3 bar. Winding machine (1) according to one of claims 19 to 46,
characterized in that the winding machine (1) has at least one pressing element (28) which can be placed on the carrying drum (2).

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