FI123533B - Apparatus for winding fibrous webs, in particular paper and board - Google Patents

Description

Apparatus for winding fibrous webs, in particular paper and board

The invention relates to an apparatus according to the preamble of claim 1 for winding fibrous webs, in particular paper and board webs, into partial web rollers, wherein the device has winding stations for winding partial web rolls through a nip between the roll roll and the forming roll.

The invention also relates to a method for winding fibrous webs, in particular paper and paperboard webs, into a web roll according to the preamble of claim 7, wherein the web rolls are rolled through a nip between the roll roll and the forming roll in a roll position.

It is known to produce a fibrous web, such as paper, on machines that together form a paper production line that can be hundreds of meters long. Modern paper machines can produce more than 450,000 tonnes of paper per year. The speed of the paper machine 15 can exceed 2000 m / min and the width of the paper web can exceed 11 m.

In papermaking lines, papermaking is a continuous process. A paper web made from a paper machine is rolled around a reel axis, a reel roll, into a machine reel, which can be over 5 meters in diameter and over 160 tons in weight. The purpose of the winding is to convert a flat web of paper into a hel-20 bombable shape. With the reel located on the main machine line, the continuous process of the papermaking machine is interrupted for the first time and switched to intermittent operation.

° The paper roll of the papermaking machine is full-width and even over 100 ° km, so it has to be cut into widths and lengths suitable for paper mill customers and rolled around the cores. customer rolls before shipment from the paper factory. This web longitudinal cutting and rewinding is known to take place in a suitable separate machine, i.e. a winder.

CL

£ 2 In the winder, the machine reel is rolled open, the wide web is cut by a cutting section S into a number of narrower sub-webs which are rolled by a reeling section around the reeling cores o 30, such as cores, into customer rolls. When the customer rolls are finished, the longitudinal section is stopped and the rolls, or so-called rollers, are stopped. the move is removed from the machine. After that, the process will continue as a new move. These steps are repeated periodically 2 until the paper runs out of the machine reel, whereupon the machine reel is replaced and operation begins again as the new machine reel is unwound.

The winders use different types of winding devices depending on e.g. of the type of roll. In center roller type winders, the web is guided from the open-5 winding through guide rolls to a cutting section where the web is cut into sub-webs, which are further guided to the reel roll (s) in reel positions for reel-loading customer rolls. The adjacent sub-webs are wound on different parts of the winding roll / roll.

Various types of center rollers are known from the prior art as a roll-10 dilution of winders. For example, EP-0478719 describes a known cutter reel, in which the wrapping of the partial webs takes place on both sides of the reel roll, so that as the reel grows, its center moves horizontally at a so-called zero angle with respect to the reel roll. In this known solution, the nip load is provided by the winding seats horizontally towards the winding cylinder by external force of a load-15 racket.

FI-71708, on the other hand, describes a cutter reel in which the reel arms are articulated, so that as the diameter of the reel increases, the reel nipple moves around the circumference of the reel roll, i.e., the web coverage angle on the reel roll changes.

EP 0829438 and US 4508283, on the other hand, describe cutter reels, roller stations 20 are located above a roller roll and suspended on a solid cross member in the transverse direction of the machine, and their support requires massive overhead roller structures.

It is an object of the invention to provide an apparatus and method for winding fiber webs in which the nip load is controlled throughout the winding.

CNJ

It is an object of the invention to provide an apparatus and method for winding fibrous webs in which the winding stations are firmly supported.

X

It is an object of the invention to provide an apparatus and method for rolling a web of fibrous webs in which the self-weight of the resulting web roll can be utilized to produce a nip δ low load, δ ^ in the characterizing part of claim 1. The method 3 according to the invention, in turn, is essentially characterized by what is stated in the characterizing part of claim 7.

According to the invention, the reeling takes place by utilizing the mass of the roll, and as the roll grows, its center moves linearly at a certain angle with respect to the roll roll, whereby the position of the nip remains fixed. Scrolling stations are firmly supported on a test floor or similar foundation. The floor or similar foundation is provided with base bolts and concrete casting or similar fastening arrangements with steel or cast iron base slabs / base rails comprising supporting guide rails. The winding stations are secured to the guide rails and the stations can be displaced along the width of the machine according to the current web width. The stability of the support of the winding stations is achieved by the fastening described above and by the fact that the gravity of the winding station and the resulting web roll is substantially perpendicular to the floor / foundation. The tramline solution also controls lateral forces.

According to the invention, the roll mass is utilized to form a nip load, and as the roll grows its center moves linearly so that the nip remains stationary and the web coverage angle does not change during the roll.

According to a further advantageous feature of the invention, the roll support angle is greater than 0 degrees and less than or equal to 90 degrees, most preferably 45 to 80 degrees.

According to a further advantageous feature of the invention, the winding stations are supported on the floor, thereby providing them with very good and stable support without massive overhead support structures.

Preferably, in the device of the invention, the outer circumference of the finished web roll is close to ^25 floor, whereby the transfer is easy because no separate roller lowering devices are needed to move the finished rolls away from the winding station. The distance of the finished peripheral roller to the floor is 5-50 mm, preferably 5-25 mm.

CC

The device of the invention achieves the nip control between the roller and the reel required for winding the webs in the winding stations during roll-up, while the roll weight is used to provide the necessary nip load and the winding station is provided floor or similar foundation. According to a preferred embodiment, the winding nip remains stationary throughout the winding, i.e. the coverage angle / distance of the web entering the winding nip around the winding roll remains constant.

4

In the following, the invention will be described in more detail with reference to the accompanying drawing, in which details the invention is not intended to be narrowly limited.

Figure 1 schematically illustrates an embodiment of the invention.

Figure 2 schematically shows an example of a longitudinal sectional arrangement in which the invention is applicable.

Figure 1 schematically illustrates an embodiment of the invention which is applicable, for example, to the longitudinal sectional arrangement of Figure 2. The figure shows a reel roll 12 on which the feed webs are denoted by reference numeral W1 ... Wn. Partial webs W1 ... Wn are rolled into part web rollers R1 ... Rn by roller roller 12 in winding station 20. Rolling station 20 is supported on floor 22 or the like and web roller R1 ... Rn is linearly fixed to winding station by support arm 21 or the like. The web roll is formed around a core 25 or the like winding core which is centered on a support arm 15 21. As the web roll increases, the increasing web roll moves linearly at an angle A relative to the roll roll 12 as indicated by arrow S in Fig. 1. less than or equal to 90 degrees, most preferably 45 to 80 degrees.

When finished, the web rolls R1 ... Rn are easily released from the winding station 20 20 and released, i.e. removed from the reel rolls R1 ... Rn, from the winding roll 12 because the winding station 20 is supported on the floor 22 or the like.

The rewinding of the partial webs W1 ... Wn to the partial web roll R1 ... Rn takes place by utilizing the mass of the roll og R1 ... Rn, preferably the web roll is supported on at least a partial roller 25 and thus provides the nip loading required for winding the web. and the roll.

CT) c \ j The remainder of the mass of the web roll is supported by the reel seats of the supporting arm 21 of the web | from the center boredom 25.

C/O

In the schematic example of Figure 2, the machine roll 10 has an open winding section 30a from which the full width web W discharged from the machine roll 10 is guided to the longitudinal section by the guide rolls 11 ^. For the sake of clarity, lengthwise cutting means, for example, longitudinal blades, laser or water jet cutting means, have been removed from the example of Figure 2, but in lengthwise the web W is cut lengthwise into partial webs W1 ... Wn of six (6). Figure 2 shows the transformation of 5 full width webs W into partial webs W1 ... Wn at the longitudinal section. From the longitudinal section, the partial webs W1 ... Wn are further guided through guide rollers towards the roller rolls 12, 13 and the first roller roller 12, whereby the second sub-web W2 ... W6 is guided to a reelable partial web roller R2 ... R6 through the first 5 rollers 12. ..W5 is conveyed into a reel-to-reel spool roller R1 ... R5 via a second roller roll.

In the example of Figure 2, even reference rolls are rolled on a first roll roll 12 and odd reference rolls are rolled on a second roll roll 13, and the corresponding partial roll rolls are denoted by the corresponding numerical index-10. There may of course be fewer or more sub-webs W1 ... Wn and naturally a smaller or larger number of sub-webs to be rolled respectively. In addition, the sub-webs may be the same and / or different width to provide sub-webs of the same and / or different width.

As shown in Figure 2, substantially all of the partial webs W1 ... Wn pass through the first-to-first roller roller 12, and every other partial web W1, W3, W5 is guided to the second roller roller 13, and thus rewound by two roller rollers 12, 13. The longitudinal sectional webs W1 ... Wn are fed together, preferably parallel, by guide roller (s) 11 to first / inner / rear roller roll 12 where each second web W2, W4, W6 is wound onto the mass of reeling weapon 20 and the other webs W1, W3, W5 are guided / outer / front winder roller 13 for retracting in its own winding positions.

The winding stations 20 of Figure 1 are preferably disposed with each of the winding rollers 12, 13. Naturally, the winding station 20 in connection with the second winding roll 13 is essentially a mirror image of the winding station 20 in connection with the first winding roll 12.

CM

The invention has been described above with reference only to a preferred embodiment thereof, however, the details are not intended to be limited in any way, but many modifications and variations are possible.

X

cc

CL

C/O

C/O

s o δ

CM

Claims (9)

Apparatus for winding fibrous webs, in particular paper and cardboard webs, into sub-web rolls, which comprises winding stations (20) for winding the sub-web rolls (R1 ... Rn) and the nip between the reel roll (12; 13) - 5 rollers supported on the floor (22) by the winding stations (20), wherein the mass of the forming roll (R1 ... Rn) forms at least a portion between the roll roll (12; 13) and the forming roll (R1 ... Rn) nip load, characterized in that the winding station (20) comprises means for moving the center of the roll linearly. Device according to Claim 1, characterized in that the winding station (20) 10 comprises means (21) for supporting the web reel formed from the winding core / core (25). Device according to Claim 1 or 2, characterized in that the roll support angle (A) with respect to the roll roll (12; 13) is greater than 0 degrees and less than or equal to 90 degrees, most preferably 45 to 80 degrees. Device according to Claim 1, characterized in that the outer circumference of the finished roll is close to the floor (22) at a distance of 5-50 mm, preferably at a distance of 5-25 mm. Device according to Claim 1, characterized in that the device comprises two rollers (12; 13) and roller stations (20) formed in connection with each roller. Apparatus according to claim 1, characterized in that the winding of the partial webs (W1 ... Wn) into the partial web roller (R1 ... Rn) is arranged utilizing the mass of the web roll ^ (R1 ... Rn) when the web roll is supported on at least its part mass. wherein the nip loading between the web roll and the reel is provided in the roll of the web by its own mass, and that the rest of the web and roll mass is supported by the winding seats of the support arm (21) from the center (25) of the web. CL A method for winding fibrous webs, in particular paper and board webs, into partial web rolls S, wherein the partial web rolls (R1 ... Rn) are rolled through a nip between the roll roll (12; 13) and the forming roll (R1 ... Rn). ) in a coiled-up winding station (20) supported by the winding stations (20) on the floor (22) and the mass of the forming roll (R1 ... Rn) forming at least part of the winding roll (12; 13) and the forming roll (R1 ... Rn) nip load, characterized in that, in the method, as the roll (R1 ... Rn) grows, its center moves linearly at a given angle (A) relative to the roll roll. Method according to claim 7, characterized in that the roll support angle (A) with respect to the roll roll (12; 13) is greater than 0 degrees and less than 5 or equal to 90 degrees, most preferably 45 to 80 degrees. Method according to claim 7, characterized in that the finished web (R1 ... Rn) is moved directly from the winding station (20) to the floor (22). C \ J δ c \ j i o CO o X cc CL CO CO δ o δ CVJ