EP0997415B1 - Winding machine - Google Patents

Abstract

A paper length (14) is passed over a support drum (12), and there is a winding gap (18) between the drum and the reel-spool (16). The support drum has a perforated jacket and/or circumferential grooves, and is supplied with suction force via an external suction box (42). The box has a suction aperture (44) opposite the part of the support drum not covered by the paper length and a sealing element (46,48) around the aperture, which acts with the drum. The seal also acts as a scraper, to remove the front end of the paper length from the support drum.

Description

The invention relates to a winding machine for winding a material web like in particular a paper or cardboard web on one Drum, in which the material web over a a perforated jacket and / or with circumferential grooves provided and thus vacuumable carrier drum guided and a winding nip between the support drum and the drum is formed.

Such a winding machine is, for example, from EP-B1-0 658 504 known. In this case, a suction drum with internal suction is provided. A corresponding winding machine is, for example, at the end of a the manufacture or refinement of a machine that serves as a material web used. However, it can also serve, for example, to already have one to wind the finished wound reel. On the machine in question can be, for example, a paper machine.

In practice, especially when the Material web or a performer or a performer of this Material web problems occur on the winding device. It has been so far common practice, for example the performance of the material web by means of performance ropes, blowing sheets, vacuum belts and / or the like to the carrier drum, whereupon this performer is guided around the carrying drum. Then the performing for example by means of a scraper, e.g. a pale scraper, one Blow wedge or the like and for example by means of a baffle, again removed from the carrying drum and into a reject breaker derived. The paper web is then moved wide and continuously in removed the committee dissolver. For this purpose, for example, a baffle be provided with a blowing device. Then the material web for example by means of a gooseneck, ribbon, knife, Water jet and / or the like separately and on a provided Empty drum listed. This can lead to an uncontrolled Self-performance of the particular strip-like performance or the entire web of material on a provided empty reel or one already wound drum come. This problem is increasing at high machine speeds and grooved or drilled, not vacuumed carrying drums.

FIG. 1 shows such a device using a conventional winding machine 10 unwanted self-performance deviating from the desired web run A. The path B is the case that the for example, strip-like performers guided over the carrying drum 12 the material web 14 or the entire material web 14 immediately following that between the support drum 12 and an empty drum 16 'formed nip 18 by itself in an uncontrolled manner is wound onto the empty drum 16 '. With C is the case of an uncontrolled Performing yourself on a drum that has already been wound on 16 shown. In contrast, at the desired web run A, the performers would or the material web 14 only by a scraper 20 from the Carrier drum 12 solved and derived in the Committee 22.

The suction of the carrier drum is the guide of the usually strip-like Performing or the material web to the drain area on Scraper 20 affects, so that in this case a self-performance on the empty drum 16 '(case B) can be avoided. To do this for example, carrying drums connected to a vacuum source and are sucked off via one or both pins. at the widely used drum designs without internals vacuumed entire interior. As a result, it is now possible to use the Part of the carrier drum penetrate false air, which in particular involves a relatively high energy consumption. support drums with internal sealing the disadvantage of being within the Carrying drum arranged functional elements. For example for a possible replacement of the seals, the carrying drum get extended. All known designs also have the disadvantage that always a scraper device for acceptance of the performing or the paper web from the carrier drum required is. Document US-A-5 515 619 discloses an arrangement for guiding one drying fibrous web together with a support tape from a drying cylinder to a deflecting roller of a drying device, the deflecting roller having perforations, which can be connected to a vacuum source by means of an external suction box.

The aim of the invention is to provide a winding machine of the type mentioned to create a structure that is always reliable, controlled performance of the performance end or the material web allowed.

This object is achieved according to the invention in that the carrying drum can be sucked through at least one outer suction box, which with at least one suction opening that is not wrapped in the material web Circumferential area of the carrier drum is opposite and in the area this suction opening at least one cooperating with the support drum Has sealing element, and that at least one through a sealing element formed scraper is provided in the web drain area of the support drum to the over the carrier drum guided material web or a performer of this material web again to be detached from the carrying drum.

Because of this training is especially in the initial Performing the usually strip-like performing end of the Material web always ensures a defined web run. So in particular ruled out that it would lead to an uncontrolled self-performance of the performer or the entire material web on an empty reel or a wound drum comes. The one you want Web running is particularly also at higher machine speeds guaranteed. With the use of an external suction box is in everyone Case also ensured that almost none in the carrier drum False air penetrates, resulting in lower energy consumption brings. A possible change of seals is very simple feasible. It is no longer necessary to remove the carrying drum. In addition, the additional scraper device previously required omitted. For example, a Carrier drum provided, in particular strip-like sealing element be designed as a scraper at the same time.

It is expedient for at least one sealing element to be transverse to Sealing strip extending web direction.

In a practical embodiment, the suction box is on both Provide transverse sides of the web running direction with sealing elements designed as sealing strips. In principle, it is also possible to have the suction box on both sides to be sealed by sealing strips forming scrapers.

It is also advantageous if at least the one provided in the web run-off area Scraper, can also be pneumatically loaded as a sealing strip is. Here, the sealing strip can, for example, at least a compressed air hose or the like can be pressed onto the carrying drum his.

In a preferred practical embodiment of the invention Winding machine is the sealing strip around a parallel to the drum axis Axle pivoted on a side wall of the suction box and can be pressurized in opposite directions by two compressed air hoses. In this way, different ones can be used Contact pressures can be set.

In a preferred practical embodiment, the Suction box at least essentially across the web running direction the entire machine width.

The suction box is advantageously connected to a vacuum source via a inner tube provided with suction openings Vacuum can be applied. The inner tube can at least extend essentially over the entire machine width. The in Sheath of this inner tube are provided suction openings expediently on the side of the tube facing the carrying drum intended.

In particular with a view to performing an as optimally as possible strip-like performers of the material web, it is advantageous if the Carrying drum and the suction box to form one in the area of the concerned The edge suction zone provided in the drum is divided accordingly are. It can preferably be done via the inner tube either just the edge suction zone or at least essentially entire suction zone extending across the entire width of the machine be subjected to a vacuum.

To loosen the material web or the leading end of this material web Support from the carrying drum can be in the web run-off area a blowing device may be provided. Such a blowing device is expediently arranged on a side wall of the suction box.

In a preferred practical embodiment of the invention Winding machine extends from at least one sealing element limited suction opening of the suction box over at least essentially the entire circumferential area not wrapped by the material web the carrying drum.

A zone-controlled inner support can be assigned to the carrier drum is. Such a zone-controlled inner support can e.g. like with the be known from DE-A1-196 33 958 suction roll. It can, for example, a Nipco roller in the perforated drum be provided. The jacket of the carrier drum can be on his Inside in particular also via at least one rotating body located on the inside be supported with an associated plain bearing, as in the DE-U-29712682 is described.

Figur 1

eine herkömmliche Wickelmaschine mit innenbesaugter Tragtrommel,

Figur 2

eine rein schematische Darstellung einer Ausführungsform der erfindungsgemäßen Wickelmaschine und

Figur 3

eine vergrößerte Darstellung einer im Ablaufbereich der Tragtrommel der in Figur 2 gezeigten Wickelmaschine angeordneten, gleichzeitig als Schaber ausgeführten Dichtleiste mit nachgeordneter Blaseinrichtung.

The invention is explained below using an exemplary embodiment with reference to the drawing; in this show:

Figure 1

a conventional winding machine with a suction drum inside,

Figure 2

a purely schematic representation of an embodiment of the winding machine according to the invention and

Figure 3

an enlarged view of a sealing strip arranged in the discharge area of the carrying drum of the winding machine shown in FIG. 2 and simultaneously designed as a scraper with a downstream blowing device.

Figures 2 and 3 show a purely schematic representation of an example Embodiment of a winding machine 10 according to the invention for winding a material web 14 onto a reel 16. At the Material web 14 can in particular be a paper or cardboard web act. The winding machine can in particular at the end of such Paper machine may be provided.

To produce a winding roll 30, the material web 14 is over a Spreader roller 24 and then guided over a carrying drum 12, those with an empty drum 16 'or the resulting winding roll 30 an already wound drum 16 forms a winding gap 18. The Carrier drum 12 and the resulting winding roll 30 are normally i.e. except for certain specialty papers where free winder is used are kept in contact with each other during the winding process, to maintain this winding gap 18.

The next, still empty drum 16 'is already in a primary lever 26 kept ready. The drum 16 'can be acted upon by a primary drive 28, by which it can be rotated in the primary lever 26 can. The primary drive 28 can run along a first through the Primary lever 26 defined guideway can be shifted.

The winding machine 10 also includes a secondary bearing 32 which e.g. have a transport device movable on a linear guide can. Such a transport device is then used for mounting and Guiding a respective reel 16. In addition, rails 34 be provided, of which only one can be seen in Figures 1 and 2. This Rails 34 are arranged parallel to the horizontal and on a machine frame 36 attached. A storage unit can thus be provided Drum 16 are placed on the rails 34, which means that the Weight of this reel 16 or the resulting winding roll 30 from this rails 34 is added.

Thus, the resulting winding roll 30 is in the illustrated embodiment with the associated drum 16 by a corresponding one Transport device along a second parallel to the rails 34 Movable guideway that runs essentially horizontally.

The drum 16 can be acted upon by a secondary drive 38, through which it rotates within the secondary bearing 32 becomes. The secondary drive provided in the present case as a center drive 38 is along the second guideway parallel to the rails 34 traversable.

Which can be driven again, for example, by means of a center drive Carrying drum 12 serves in the present case as a pressure drum, whereby it for example via a guide carriage parallel to the rails 34 the secondary bearing 32 is movable. In the present case, the Carrier drum 12 and the winding roll 30 with associated drum 16 in proceed on the same level.

The line force in the winding gap 18 can in particular have a corresponding Pressure of the support drum 12 on the drum 16 or on this winding roll 30 formed can be adjusted in the desired manner. A corresponding compensation of the increasing winding diameter can by a corresponding movement of the winding roll 30 can be compensated along the rails 34.

In particular, a pop-roller arrangement is also possible, in which the Carrier drum is firm.

As can be seen in particular from Figure 3, the jacket is the Carrier roller 16 continuously provided with holes 40 and an outer Suction box 42 can be sucked. This suction box 42 lies with his Suction opening 44 the peripheral region not wrapped by the material web 14 the carrier drum 12 opposite. This suction box 42 extends cross at least substantially across the web running direction L. the entire machine width. He is on both long sides by provided in the area of the suction opening 44 with the support drum 12 cooperating sealing strips 46, 48 sealed to the outside. moreover are also corresponding on the two end faces of the suction box 42 Sealing elements provided.

According to Figure 2, the material web 14 with its strip-like performers already performed on the support drum 12. In a drain area 50, the material web 14 is released from the support drum 12 and in derived a reject resolver 22.

As can be seen in particular with reference to FIG. 3, this is shown in FIG Drain area 50 of the support drum 12 provided sealing strip 48 at the same time designed as a scraper through which the guided over the support drum 12 Material web 14 or a performer of this material web 14 again is released from the support drum 12 (see also Figure 2). in principle The suction box 42 can also be formed on both sides by scrapers Sealing strips must be sealed.

According to FIG. 3, the one provided in the discharge area 50 has at the same time as a scraper sealing strip 48 a parallel to the drum axis Axis 52 pivotable on a side wall 54 of the suction box 42 mounted base body 48 'and a scraper blade inserted therein 48 ". The base body 48 'is by two compressed air hoses 56, 58 in opposite directions acted upon. The two compressed air hoses 56, 58 are arranged on opposite sides of the axis 52, whereby the sealing strip 48, which also serves as a scraper, passes through the compressed air hose 58 can be pressed onto the carrying drum 12 while through the other compressed air hose 56 away from the carrying drum 12 is acted upon. About these two compressed air hoses 56, 58 is thus the respective contact pressure with which the sealing strip 48 against the carrier drum 12 is held, in particular also adjustable.

As can be seen from FIG. 2, the suction box 42 is in the present Case via a connectable to a vacuum source 60, with suction openings 62 provided inner tube 64 can be subjected to negative pressure. This inner tube 64 also extends in the present case Case at least essentially over the entire width of the machine.

The suction openings provided in the jacket of the inner tube 64 62 can in particular on the side facing the carrying drum 12 of the tube 64 may be arranged.

In particular, the best possible transfer of the strip-like To ensure that the material web 14 can perform Carrier drum 12 and the suction box 42 to form a in the area the relevant suction end of the relevant edge suction zone be divided. It is either either via the inner tube 62 only the edge suction zone or at least essentially The entire suction zone with vacuum extends over the entire width of the machine acted upon.

As can be seen in particular from FIG. 3, is in the web run-off area 50 a the loosening of the material web 14 or the performing end this material web 14 from the support drum 12 supporting blowing device 66 provided. In the present case, this blowing device is also 66 arranged on the side wall 54 of the suction box 42.

After the suction opening delimited by the sealing elements 46, 48 44 of the outer suction box 42 over at least substantially the entire not encircled by the material web 14 peripheral region the support drum 12 extends, it is ensured that no false air in penetrates the interior of the suction box 42, causing energy consumption is kept low. As a result of the carrier drum sucked in from the outside 12 is particularly the risk of uncontrolled self-performance of the performers or the entire material web 14 on the still empty drum 16 'or the winding roll 30 of an already tied Removed drum 16. A respective change of the seals is in the simplest possible way. An expansion of the support drum 12 is for this not necessary anymore. After the sealing strip 48 simultaneously as a scraper the additional scraper device previously required is also eliminated.

After the material web 14 starting from that shown in FIG If the course of the web is wide, it can be placed on an empty drum 16 ' be performed. An uncontrolled self-performance is excluded. Even an uncontrolled self-performance on one already wound drum is practically impossible.

LIST OF REFERENCE NUMBERS

10

winder

12

carrying drum

14

web

16

wound drum

16 '

empty drum

18

winding gap

20

scraper

22

Ausschußauflöser

24

Spreader roll

26

primary lever

28

primary drive

30

reel

32

secondary storage

34

rails

36

machine frame

38

secondary drive

40

holes

42

outer suction box

44

suction opening

46

sealing strip

48

sealing strip

48 '

body

48 "

scraper jack

50

drainage area

52

axis

54

Side wall

56

Compressed air hose

58

Compressed air hose

60

vacuum source

62

suction ports

64

pipe

66

blower

Claims (18)

1. Winder (10) for winding a material web (14) such as, in particular, a paper or board web, onto a spool (16), in which the material web (14) is led over a carrier drum (12) which has a perforated cover and/or is provided with circumferential grooves and to which vacuum can be applied and a winding nip (18) is formed between the carrier drum (12) and the spool (16), characterized in that the carrier drum (12) can have vacuum applied to it via at least one external suction box (42) which, with at least one suction opening (44), lies opposite that circumferential region of the carrier drum (12) around which the material web (14) does not wrap and, in the region of this suction opening (44), has at least one sealing element (46, 48) that interacts with the carrier drum (12) and
   in that at least one scraper formed by a sealing element (48) is provided in the region (50) of the carrier drum (12) in which the web runs off, in order to detach the material web (14) led over the carrier drum (12) or a leader of this material web (14) from the carrier drum (12) again.
2. Winder according to Claim 1, characterized in that at least one sealing element is formed as a sealing strip (46, 48) extending transversely with respect to the web running direction (L).
3. Winder according to one of the preceding claims, characterized in that the suction box (42) is provided with sealing elements formed as sealing strips (46, 48) on both longitudinal sides running transversely with respect to the web running direction (L).
4. Winder according to Claim 3, characterized in that the suction box (42) is sealed off on both sides by sealing strips (46, 48) that form scrapers.
5. Winder according to one of the preceding claims, characterized in that at least the scraper which is provided in the region (50) in which the web runs off and which is designed as a sealing strip (48) can at the same time be loaded pneumatically.
6. Winder according to Claim 5, characterized in that the sealing strip (48) can be pressed onto the carrier drum (12) by at least one compressed-air hose (58).
7. Winder according to Claim 5 or 6, characterized in that the sealing strip (48) can be acted on away from the carrier drum (12) by at least one compressed-air hose (56).
8. Winder according to one of Claims 5 to 7, characterized in that the sealing strip (48) is mounted on a side wall (54) of the suction box (42) such that it can be pivoted about an axis (52) parallel to the drum axis (12) and can be acted on in opposite directions by two compressed-air hoses (56, 58).
9. Winder according to one of the preceding claims, characterized in that the suction box (42) extends transversely with respect to the web running direction (L), at least substantially over the entire machine width.
10. Winder according to one of the preceding claims, characterized in that the suction box can be acted on with vacuum via an internal pipe (64) which can be connected to a vacuum source (60) and is provided with suction openings (62).
11. Winder according to Claim 10, characterized in that the internal pipe (64) extends at least substantially over the entire machine width.
12. Winder according to Claim 10 or 11, characterized in that the suction openings (62) provided in the cover of the internal pipe (64) are provided on the side of the pipe (64) which faces the carrier drum (12).
13. Winder according to one of the preceding claims, characterized in that the carrier drum (12) and the suction box (42) are subdivided appropriately in order to form an edge suction zone provided in the region of one of the two drum ends.
14. Winder according to Claim 13 and one of Claims 10 to 12, characterized in that either only the edge suction zone or the entire suction zone extending at least substantially over the entire machine width can optionally have vacuum applied to it preferably via the internal pipe (62).
15. Winder according to one of the preceding claims, characterized in that, in the region (50) in which the web runs off, a blower device (66) is provided which assists the detachment of the material web (14) or the leader of this material web (14) from the carrier drum (12).
16. Winder according to Claim 15, characterized in that the blower device (66) is arranged on a side wall (54) of the suction box (42).
17. Winder according to one of the preceding claims, characterized in that the suction opening (44) bounded by at least one sealing element (46, 48) of the suction box (42) extends over at least substantially the entire circumferential region of the carrier drum (12) around which the material web (14) does not wrap.
18. Winder according to one of the preceding claims, characterized in that the carrier drum (12) is assigned a zone-controlled internal support.

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