EP1153867A2 - Winding machine for continuously winding a material web - Google Patents

Abstract

The spooling machine has an air squeezing device that forms a bearer profile (13) with segment rollers mounted adjacent and eccentrically with bearings (14,14.1). The non-rotatable bearing bushes (23,23.1) are supported centrally with at least one force transfer element (24,24.1) each on a tube (21) containing a pressure medium, enclosed by a guide tube (20) and located within the bearer profile. The machine has a bearer drum forming a pressure point with a winding roller, a bearing device containing at least one transport device that moves the drum along a preferably horizontal guide path and an air squeezing device in the lower region of the machine for application to the winding roller. The air squeezing device (12) forms a bearer profile (13) with segment rollers (15,15.1) mounted adjacent and eccentrically with bearings (14,14.1). The non-rotatable bearing bushes (23,23.1) are supported centrally with at least one force transfer element (24,24.1) each on a tube (21) containing a pressure medium, enclosed by a guide tube (20) and located within the bearer profile.

Description

The invention relates to a winding machine for the continuous winding of a Material web, in particular a paper or cardboard web, towards a reel a winding roll with the features according to the preamble of claim 1.

Such winding machines are for example from the European patent EP 0 483 092 B1 or from PCT document WO 98/52858 A1 (PR10706 WO) well known to the applicant and are particularly in machines for the production or refinement of material webs, such as Paper or cardboard, used.

With modern winding concepts today it is necessary to prepare one Reel change the reel with the almost fully wound reel To bring ("finished drum") into a final position (drum change position) in which then no active contact, no so-called nip, between the carrier drum and there is more of the winding roll. In this time when there is no longer a nip, Suitable measures must be taken to ensure that there are no air pockets arise between the individual layers of the almost fully wound winding roll. The "wrapped" web tension must also be maintained, the desired winding quality also in the outer area of the winding roll to be able to guarantee. The problem that arises becomes all the greater, ever the winding machines are operated faster (magnitude 1,500 - 2,500 m / min) and the larger the diameter of the finished drum (Size 2.5 - 4.5 m).

An attempt has already been made in a winding machine of the type described to solve this problem, as in the German patent application DE 44 01 804 A1 (PR10035 DE) of the applicant is disclosed. A facility is provided there comprising a pressure roller with an elastic coating, the a winding roll removed from a carrier drum by means of a pneumatic Drive can be pressed. This facility has the task of creating To prevent air pockets between the individual layers of the winding roll and during the reel change the "wrapped" web tension is maintained to obtain. However, the pressure roller has the serious disadvantage that it is subject to a deflection due to its own weight, the winding roll to Example due to different paper thickness, more or over the width deviates less from an ideal cylinder shape and the pressure roller itself therefore not evenly on the surface contour of the almost fully wound Can create winding roll across the web width. As a result, that the formation of air pockets between the outer layers of the almost fully wound winding roll cannot be completely avoided. Another pressure roller is from German utility model DE 91 17 272 U1 known, but the pressure roller disclosed also just has disadvantages mentioned.

European patent EP 0 714 373 (≡ WO 95/34495 A1) discloses one Method and device for applying final web layers on a winding roll in a winding machine that during a Winding process was generated. It is provided that before applying the final web layers an air squeeze device in operative contact with is brought to the surface of the winding roll that after that the winding roll under Retain the active contact in their exchange position while doing so a desired strength of the active contact in order to avoid the occurrence of air pockets between the individual layers of the winding roll becomes. The pressing air squeezing element of the air squeezing device is a brush. Experiments have shown that the use a brush can be disadvantageous in that the permanent danger there is that the brush hair will damage sensitive types of paper loosen individual brush hairs and come into the paper cycle as a contaminant or that the brush hair itself is damaged.

Furthermore, winding machines are known in which after each reel change no contact between the carrying drum during the entire winding process and winding roll is present. That is why there is again an air squeezer with an air squeeze element in the form of a permanent on the winding roll adjacent pressure roller provided.

Such a winding machine is, for example, from the two German ones Utility model documents G 88 08 823.5 (≡ US-A-5,249,758) and DE 298 11 053 U1 known.

Both of the utility model documents mentioned are disadvantageous in that wide paper or board machines there is a risk of deflection. The Construction according to the mentioned DE 298 11 053 U1 is due to the requirement that during the winding process the point of contact of the sensing roller with the web in Winding direction by a predefinable angle after the starting point of the web while maintaining a pre-definable contact pressure on the drum coiled web is positionable, complicated and expensive.

It is therefore an object of the invention to provide a winding machine of the type mentioned Art to improve such that there are no air pockets between the individual Layers of the winding roll due to unevenness in the surface contour of the almost fully wound winding roll and thus both "Wrapped" web tension is maintained as well as a lateral one The individual layers of the winding roll are prevented from running.

This object is achieved according to the invention in a winding machine of the type mentioned at the outset solved in that the air squeeze device as a wearable Carrier profile with segment rollers mounted side by side using bearings is formed, with one of at least one inside the support profile Pressure source filled with a pressure medium and surrounded by a guide tube Hose is located on which the non-rotatable bearing bushes of the bearings centrally supported by at least one power transmission element are. This has the advantage that any unevenness in the surface contour the almost fully wound winding roll by moving it radially of the individual segment rollers and an associated pressure equalization balanced in the hose and therefore no air pockets generated between the individual layers of the winding roll, and this while maintaining the "wrapped" web tension. The technical structure of the Air squeezing device according to the invention also results in a high degree self-damping system, which of the material web or vibrations induced by the winding roll are largely eliminated.

Both under printing technology and under construction respectively manufacturing aspects is the carrier profile, which between the Round bearing bushes attached to the bearing, a support tube, preferably one round support tube.

The force transmission element is preferably a tappet, since this is manufacturing technology is easy to manufacture and the requirements placed on it its function, lifespan and the like fully fulfilled.

According to the invention, the pressure medium is a liquid, preferably a hydraulic liquid, or a gas. Both print media belong to the state of the Technology and each provide an inexpensive print medium at different Operating conditions.

With regard to the technological requirements for the air squeeze device it is advantageous if the segment roller has a diameter of 200 to 400 mm, preferably from 250 to 350 mm, and a width from 150 to 400 mm, preferably from 200 to 300 mm. These dimensions ensure that the Material web due to the action of the air squeeze device none at all Damage, for example grooves or other markings, and changes in properties, for example, highlights. In terms of avoidance of the damage and property changes mentioned it is also advantageous if two immediately adjacent segment rollers are spaced apart from 0.5 to 5 mm, preferably from 1.0 to 2.0 mm.

Furthermore, it is in order to avoid air congestion as much as possible Air squeeze device is an advantage if the segment roller is rubberized and / or has a grooved surface. The rubberized surface of the segment roller preferably has a hardness of 50 to 200 P&J (Pussy & Jones), preferably from 80 to 120 P&J (Pussy & Jones).

As part of a quick and slight readjustment of the air squeeze device the support profile is mounted eccentrically. The eccentric bearing advantageously has an eccentricity of 2 to 20 mm, preferably 5 up to 12 mm, because this eccentricity without any major design effort is feasible.

To the greatest possible avoidance of air pockets between the individual To reach positions of the winding roll, the air squeezing device is to the Winding roll can be placed at the point at which the material web on the outer surface the winding roll hits. Upstream and downstream positions result in a loss of effectiveness regarding the avoidance mentioned.

With regard to the runnability and efficiency of the winding machine, it is advantageous if the air squeeze device before opening the nip between the carrier drum and the winding roller can be placed on the winding roller, since only when the nip is open the air squeezing device does its job with the greatest possible efficiency.

The air squeezing device is essentially linear, preferably horizontal and / or vertical, and / or substantially along a contour of a segment of a circle can be created. In practice, these mooring movements result in: their regulations and moving mass or mass changes Benefits.

It is also advantageous that when an effective area is formed between the winding roll and the air squeeze the effective force in the effective range by Relocation of the air squeeze device is adjustable. This will make a good winding result available up to the last winding layers, that is a Winding roll with a defined, uniform winding hardness over the entire Winding time, achieved because a fine regulation of the active force in the effective range between the winding roll and the air squeezing device even during the final Winding phase in which there is no nip between the drum and the There is more winding roll, is possible.

It goes without saying that the aforementioned and still to be explained below Features of the invention not only in the respectively specified combination, but can also be used in other combinations or alone are without departing from 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 to the drawing.

Show it

Figure 1:

a schematic side view of a winding machine with the invention Air squeezer during the main winding phase;

Figure 2:

a schematic side view of a winding machine with the invention Air squeeze device during the final winding phase;

Figure 3:

a simplified representation (longitudinal section) of the invention Air squeeze device; and

Figure 4:

a simplified representation (cross section) of the invention Air squeeze device.

The winding machine 1 shown in a schematic form in FIG. 1 comprises a support drum 2, which is also referred to as a pressing drum or back-up roll, which is either rigidly mounted or can be displaced along an imaginary horizontal line G shown in dashed lines by means of a pressing device (not shown) (double arrow 3) and by a drive , in the case shown is driven by a center drive. The various types of storage and movement for the carrying drum 2 are disclosed in particular in the German patent application DE 198 07 897 A1 (PR10678 DE) by the applicant. Their content 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 (also not shown here), then first wraps around a spreader roller (not shown) and then runs in the direction of the arrow on the lateral surface 5 of the carrying drum 2, wrapping around the lateral surface 5 of the support drum 2 by a certain angle (circumferential area) until it is detached by the resulting winding roller 6. The detachment of the material web 4 from the support drum 2 and the transfer to the resulting winding roller 6 takes place in the so-called nip 7, which is located during the main winding phase between the Carrier drum 2 and the winding roller 6 forms. The winding roll 6 is guided in the direction of movement indicated by the arrow 8 by means of a lifting device, not shown, of a movable transport device. The lifting device can be formed, for example, by a spindle drive which comprises a threaded spindle driven by an electric motor. The transport device serves to hold and guide the reel 10 of the winding roller 6 resting on the rails (guideway) 9. A device for regulating the line force L arising in the nip 7 during the main winding phase is described, for example, in the aforementioned German published patent application DE 198 07 897 A1 ( PR10678 DE) of the applicant. In the main winding phase shown in FIG. 1, an empty reel ("empty reel") 11 is held at a distance from the carrying drum 2 by a holding device (not shown) ("standby position").
Below the winding roll 6, the air squeezing device 12 is shown in dash-dotted form, which is in no active relationship with the winding roll 6 during the main winding phase shown. Rather, it is in a waiting position. The air squeezing device 12 can be moved with generally known mechanisms both essentially linearly, preferably horizontally and / or vertically, and essentially along an outline of a segment of a circle.

FIG. 2 shows a schematic side view of a winding machine 1 with an air squeezing device 12 according to the invention during the final winding phase. During this final winding phase, the winding roller 6 is moved away from the carrying drum 2 with the transport device already described, with the nip 7 being released and with the formation of a free web tension. The empty drum 11, previously held at a distance from the carrying drum 2, is then placed on the carrying drum 2 with the formation of a nip 7 by the holding device (not shown). The winding phase for the empty reel 11 then begins with the web separation (not shown), the winding reel 6 then no longer being wound and being moved horizontally into an end position (reel changing position).
According to the invention, the air squeezing device 12 is now applied to the winding roller 6 between the carrier drum 2 and the winding roller 6 before opening of the nip 7. Immediately when an effective area W is formed between the winding roll 6 and the air squeezing device 12, the effective force K in the effective area W is regulated by a displacement of the air squeezing device 12. Such a control loop belongs to the knowledge of the average person skilled in the art and is disclosed, for example, in the aforementioned German laid-open application DE 198 07 897 A1 (PR10678 DE) by the applicant for a carrying drum. The air squeezing device 12 is shifted to the winding roll 6 while maintaining the effective force K in the effective area W. The displacement is only ended when the winding roll 6 has reached its end position (reel changing position) horizontally.
FIG. 3 shows a simplified illustration (longitudinal section) of the air squeezing device 12 according to the invention in longitudinal section, whereas FIG. 4 shows in cross section.

According to FIG. 3, the air squeezing device 12 according to the invention can be put on Carrier profile 13 with by means of bearings 14, 14.1, preferably roller bearings, juxtaposed segment rollers 15, 15.1 are formed. in the Inside the support profile 13 is a pressure source 16 (pressure pump 17 and electric motor 18) with a pressure medium 19, preferably one Liquid or a gas, filled and surrounded by a guide tube 20 Hose 21, which is provided on both sides with a closure cover 22. On the hose 21 are the non-rotatable bearing bushes 23, 23.1 of the bearings 14, 14.1 by means of a power transmission element 24, 24.1, preferably a plunger are supported centrally and radially. The power transmission elements 24, 24.1 run through attached in the guide tube 20 Breakthroughs 25, 25.1, preferably holes. The carrier profile 13 is preferably designed as a carrier tube and is simplified on both sides in one Representation shown chair 26 held. The segment rollers 15, 15.1 have a diameter D of 200 to 400 mm, preferably 250 to 350 mm, and a width B from 150 to 400, preferably from 200 to 300 mm, on. Two immediately adjacent segment rollers 15, 15.1 are spaced apart A from 0.5 to 5 mm, preferably from 1.0 to 2.0 mm. The segment roles 15, 15.1 have rubberized and / or grooved surfaces 27, 27.1; Naturally can also have flat surfaces 27, 27.1. The rubberized Surfaces 27, 27.1 of the segment rollers 15, 15.1 have a hardness of 50 to 200 P&J, preferably from 80 to 120 P&J.

The air squeezing device 12 according to the invention is in cross section in FIG shown. The eccentric mounting of the carrier profile 13 can be clearly seen. The eccentricity E takes a value between 2 and 20 mm, preferably between 5 and 12 mm. The location and the size of the eccentricity E is according to Use case determined constructively.

In summary, it should be noted that the invention is a winding machine of the type mentioned is improved in such a way that both Air pockets in the individual layers of the winding roll due to unevenness arise in the surface contour of the almost fully wound winding roll as well as the "wrapped" web tension is maintained.

Reference list

1

Winding machine

2nd

Carrier drum

3rd

Double arrow

4th

Material web

5

Lateral surface

6

Winding roll

7

Nip

8th

arrow

9

rail

10th

Drum

11

Empty drum ("empty drum")

12th

Air squeeze device

13

Beam profile

14, 14.1

camp

15, 15.1

Segment roll

16

Pressure source

17th

Pressure pump

18th

Electric motor

19th

Print medium

20th

Guide tube

21

tube

22

Sealing cover

23, 23.1

Bearing bush

24, 24.1

Power transmission element

25, 25.1

breakthrough

26

Stool

27, 27.1

surface

A

distance

B

width

D

diameter

E

eccentricity

G

Horizontal straight line

K

Effectiveness

L

Line force

W

Effective range

Claims (15)

Winding machine (1) for the continuous winding of a material web (4), in particular a paper or cardboard web, onto a reel (10) to form a winding roll (6), a, with a carrier drum (2) which forms a nip (7) with the winding roller (6), b, with a bearing comprising at least one transport device, which guides the drum (10) along a preferably horizontal guideway, and c, with an air squeeze device (12) attached in the lower region of the winding machine (6), which can be placed on the winding roller (6),
characterized in that d, the air squeezing device (12) is designed as a support profile (13) which can be applied with segment rollers (15, 15.1) eccentrically mounted next to one another by means of bearings (14, 14.1), one of at least one pressure source (16 ) with a pressure medium (19) and a hose (21) surrounded by a guide tube (20), on which the non-rotatable bearing bushes (23, 23.1) of the bearings (14, 14.1) each have at least one force transmission element (24, 24.1) are centrally supported. Winding machine (1) according to claim 1,
characterized in that
the support profile (13) is a support tube. Winding machine (1) according to one of the preceding claims,
characterized in that
the force transmission element (24, 24.1) is a plunger. Winding machine (1) according to one of the preceding claims,
characterized in that
the pressure medium (19) is a liquid, preferably a hydraulic liquid, or a gas. Winding machine (1) according to one of the preceding claims,
characterized in that
the segment roller (15, 15.1) has a diameter (D) of 200 to 400 mm, preferably of 250 to 350 mm. Winding machine (1) according to one of the preceding claims,
characterized in that
the segment roller (15, 15.1) has a width (B) of 150 to 400 mm, preferably 200 to 300 mm. Winding machine (1) according to one of the preceding claims,
characterized in that
two immediately adjacent segment rollers (15, 15.1) have a distance (A) of 0.5 to 5 mm, preferably of 1.0 to 2.0 mm. Winding machine (1) according to one of the preceding claims,
characterized in that
the segment roller (15, 15.1) has a rubberized and / or grooved surface (27, 27.1). Winding machine (1) according to claim 8,
characterized in that
the rubberized surface (27, 27.1) has a hardness of 50 to 200 P&J, preferably 80 to 120 P&J. Winding machine (1) according to one of the preceding claims,
characterized in that
the carrier profile (13) is mounted eccentrically and the eccentric bearing has an eccentricity (E) of 2 to 20 mm, preferably of 5 to 12 mm. Winding machine (1) according to one of the preceding claims,
characterized in that
the air squeezing device (12) can be placed on the winding roll (6) at the point at which the material web (4) strikes the outer surface (5) of the winding roll (6). Winding machine (1) according to one of the preceding claims,
characterized in that
the air squeezing device (12) can be placed against the winding roll (6) between the carrier drum (2) and the winding roll (6) before opening the nip (7). Winding machine (1) according to one of the preceding claims,
characterized in that
the air squeezing device (12) can be applied essentially linearly, preferably horizontally and / or vertically. Winding machine (1) according to one of the preceding claims,
characterized in that
the air squeezing device (12) can be applied essentially along a contour of a segment of a circle. Winding machine (1) according to one of the preceding claims,
characterized in that
if an effective area (W) is formed between the winding roll (6) and the air squeezing device (12), the effective force (K) in the effective area (W) can be regulated by a displacement of the air squeezing device (12).

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