FI107554B - Method for making a paper or board web and a paper or board machine - Google Patents

Abstract

A paper or board web is manufactured in an on-line manufacturing process, in which the web is passed from a paper or board machine (15) directly to a finishing device/finishing devices (60, 50, 10). The state of the finishing device/finishing devices (60, 50, 10) is monitored and, during a shutdown of a finishing device (60; 50; 10), said finishing device is bypassed, the web coming from the paper or board machine (15) is wound into machine reels and/or treated by means of some finishing device/finishing devices and wound into machine reels. A paper or board machine forms an on-line manufacturing process together with a finishing device/finishing devices.

Description

107554

The present invention relates to a process for the production of a paper or board web, wherein the web is produced in an on-line production process, wherein the web is fed to a paper or board machine and a paper or board machine and a paper or board machine. directly from the paper or board machine to the post-processing unit (s).

The invention also relates to a paper or board machine which, together with the post-processing device (s), forms an on-line manufacturing process.

Recently, the use of on-line manufacturing processes has become more common in the manufacture of paper and board webs, in which the entire paper or board machine functions as a single manufacturing line from start to finish, thus including the desired web finishing equipment. However, such a manufacturing process is problematic in that:

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in particular, the after-treatment of a sub-assembly, in the event of unplanned downtime and / or maintenance of the equipment, requires a reduction in the utilization rate of the entire production line and even a halt in the entire manufacturing process. This is, of course, very expensive and expensive.

Thus, prior art methods for making paper or board webs are known which direct the web from the drying section to a post-treatment, i.e. an on-line manufacturing process where the entire production line has to be reduced to 30 in the event of a malfunction or roll replacement. In this case, it is also usually necessary to drive the web to the pulper. In some cases, the entire 2 107554 production line may have to be shut down due to a problem with the finishing device. In addition, manufacturing processes in which the web is directly derived from the dryer section for on-line finishing have been able to run only grades that can be post-treated at production line speeds, such as extremely high quality calender grades which generally require lower machine speeds. could have been produced in this process, but the calendering had to be done with a separate calender eg off-line calender.

Another problem in the manufacture of paper or board webs has also been that, if at some stage in the production process, a web of unsuitable quality for the intended purpose has been produced, it has to be driven into pulpers from which it is led to mass atoms, e.g. to accommodate the wreck of an 8 hour drive.

It is an object of the invention to provide a solution to the problems described above.

It is a specific object of the invention to provide a solution that maximizes the utilization rate of a paper or board machine and aims at a situation where the paper machine can operate at all times regardless of problems with post-processing equipment.

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In order to achieve the foregoing and further objects, the process of the present invention for the manufacture of paper or board web is essentially characterized in that the process monitors the condition of the finishing device (s) and that during the downtime of the finisher or dealt with, Y. by some / some post-processing equipment with Z-equipment and rolled into machine reels.

The paper or board machine according to the invention, for its part, is essentially characterized in that the paper or board machine comprises means for monitoring the status of the paper or board machine and the finishing device (s) and means for controlling the paper or board during machine and later rolled out when the capacity of the machine allows it.

According to the invention, in the process of making a paper or board web in connection with post-processing equipment, the condition of the post-processing equipment is monitored and when the web cannot be delivered to the cardboard sheet is subsequently unwound and post-treated, for example, during a shutdown of a paper machine other than a post-processing device, or the machine reel is subjected to post-processing on a downstream or other post-processing device, either on-line or off-line. The winding is performed either by means of a winder located at the end of the machine or by means of a winder located at a suitable point in connection with the finishing devices. If necessary, unwinding rollers are also provided in connection with the finishing equipment, from which the web can be guided for finishing during the rest of the production line. The reel may also be such that it functions as both an open and a reel. In the modernization of old paper or board machines, it is possible to utilize the reels already in the machine, which can, for example, be modified 20 so that they act as both open and retractors.

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According to the invention, the paper or board web production line comprises means for monitoring the status of the post-processing equipment and controlling the production line such that the post-processing device guides the production line in the event of a malfunction or roll change so that the web is · The rollers are unfolded and then treated.

According to a preferred embodiment of the invention, the aftertreatment device 30 has an apparatus for unwinding the machine reel as well as the ability to take the web from the unwinder to the rewinder and to run the aftertreatment device as a stand-alone off-line device. The unwinding apparatus is positioned e.g. in connection with the finishing device at a suitable point on the line, for example on the machine or behind the rewinder. Such an apparatus for use in connection with the invention is preferably as simple as possible, mainly comprising the necessary means for controlling tension.

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In some embodiments of the invention, the necessary means are provided in the production line for bypassing the after-treatment device to export the head and web for situations where the web is rolled into a machine reel for storage and thus the web is not post-processed. The web can also be guided to the rewinder through post-treatment devices, whereby the post-processing devices are driven to open so-called stations.

It is possible to accomplish the bypass threading of the aftertreatment device by separate apparatus, for example from one side of the web than the actual threading, and the exportation of the web preferably passes the upper or lower end of the aftertreatment device. In off-line situations, the export of head-15 may be accomplished in a manner known per se. For threading per se, methods known per se for manual threading can be used: hand, head-rope, head-threads, blows, etc.

When using the process of the invention, problems with the post-treatment device do not drop the utilization rate of the entire production line. For example, due to roll damage, when the finishing device is down, a new threading is performed and • · * production continues during roll change and the web is rolled into machine reels. Unprocessed machine rolls are moved, for example, to storage rails to wait, and machine rolls are post-processed off-line during a subsequent after-treatment machine shutdown. Also, when using the invention 25, the roll change time is not critical as the finished web is recovered on the machine rolls.

The invention also allows for paper and board grades that cannot be achieved at on-line speeds, whereby machine rolls driven during the post-roll roll or other malfunctions can, if necessary, be post-treated at lower running speeds during the next shutdown, the whole line is run down or the production is run on dry head pulpers.

When starting a new paper machine, there is a list of possible options in the inventive list for putting an adjacent machine or neighboring mill paper or board into use after the upstream machine has been repaired.

According to a preferred embodiment of the invention, for example, a reel is rolled on a reel, which wreck can be later transferred to the mass atoms or possibly 10 for other suitable uses. The volume of the mass atom can then be reduced, for example, to correspond to a driving time of three hours. With the reel, the wreck takes up the smallest storage space.

The invention can be applied to all types of on-line after-treatment devices, e.g. 15 fish hooks and coating machines. The calender may be e.g. a multi-roll or soft calender.

According to a preferred embodiment of the invention, the invention is used in the manufacture of on-line sack paper, white top liner, sack and liquid packaging board. This 20 embodiment is an on-line calendering method using, for example, an OptiDwell (applied for; Ian trademark,) calender. After calendering, the «« «web is rolled onto the rewinder.

The invention is also suitable for use in many types of board and paper production, for example, in LWC paper production lines using, for example, the on-line duplexing device marketed by the applicant's trademark SymSizer and the applicant's trademark OptiLoad.

In the following, the invention will be described in more detail with reference to Figs. 30 of the accompanying drawings, however, the details of which are not intended to be narrowly limited.

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Figure 1 is a schematic block diagram representation of a basic embodiment of the method of the invention.

Figure 2A schematically illustrates an embodiment of the method of the invention when using the normal driving mode.

Figure 2B schematically illustrates the embodiment of Figure 2A when servicing a post-treatment device.

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Figure 2C schematically illustrates the embodiment of Figure 2A and 2B when servicing a paper or board machine.

In accordance with the schematic block diagram of Figure 1, the web made on paper or board 15 and dried on the dryer section 20 thereof is fed to post-processing equipment e.g. on an intermediate calender 60, a coating machine 50 and then to a calender 10 and further to a reel 30. , 30 is monitored in the tracking units 61, 51, 11 and during a possible shutdown of the finishing device 60, 50, 10, the finished web W is fed to a reel 30 for reeling machine 20 and stored in a storage 40. When a stoppage is detected on a paper or board machine 15 / -t and wire 9 is fed to the finishing equipment e.g. for the intermediate calender 60 and / or the coating machine 50 and / or the calender 10 for finishing, after which the web is rolled by the roller 30. The flow is schematically indicated by arrows and communicating information 22 to tracking information 42 to which information is also provided from tracking units 61, 51, 11 and from the scroller, and feedback 43 controls the operation of the intermediate calender 60, the coating machine 50, the calender 10 and the scroller 30. Naturally, the tracking data 42 provides control for the reel 30 and the storage data for the storage 40. In the method of the invention, the paper or board web 15 can be rolled at a desired speed by a paper machine 15 all the time without having to be stopped by a finishing device e.g. due to a defect occurring, but the resulting web is recovered and can be processed at a later stage in the said web. 60, 50, 10 or, alternatively, other line finishing equipment or factory off-line finishing equipment. Thus, if necessary, any post-treatment device can be bypassed and the roller can be located anywhere.

In the schematic embodiment of Figure 2A, when normally run from the drying section 20 of a paper or board machine, the web W is guided through a guide roll 13 to a calender 10 and then through a guide roll 33 to a reel 30 for winding the paper web 10 into machine roll Ri. The rollers 30 of the reel 30 are designated by reference numeral 31. The finished machine rolls Rn have been moved to the storage rails 40 for further processing. The guide rollers of web W which are not in normal operation are designated by reference numeral 43A, 43B.

2B, during the shutdown of calender 10, web W is guided from dryer section 20 through guide rollers 13, 43A, 33, past calender 10 to roller 30, where it is rolled into machine roll R1, Rn, which is transferred to storage 40 or another calender (not shown).

2C, during the other shutdown that is not caused by the paper machine finisher, the unrolled web roll (s) Rn and web W in stock 40 are unrolled to the calender 10 by means of guide rollers 43B, 43A, 13 for further calendering 33 to scroll through. Other possible positions of the open 25 roller 70 ', 70 "are indicated by dashed lines in the figure.

In Figures 2A to 2C, like parts are denoted by like reference numerals and arrows S indicate the direction of travel of web W. The embodiment of the invention illustrated in Figures 2A to 2C is very schematic and the post-processing devices may comprise, in addition to the calender 10 shown in the Figures, many other types of calendars as well as different types of coating machines or other post-processing devices. In addition to the embodiment shown in the figures, the export of web W can also be performed above the post-treatment equipment or by running the web after-treatment stations through the post-processing equipment. Both openers and retractors may be located at appropriate positions above or below the post-treatment devices or between / behind the post-processing devices. If desired, the actual retractor 30 may also function as an open-up reel. The warehouse may also be located elsewhere than in the position shown in the figures. Unprocessed machine rolls RN are transferred, for example, using a hall crane (not shown) or other suitable means to the unroller.

Claims (14)

9 107554 A process for the production of paper or stacked paper, wherein the web (W) is produced in an on-line manufacturing process in which the web (W) is led from a paper or board machine (15) to a direct post-processing device (s) (60,50,10). that the method monitors the subscriber of the post-processing device (s) (60, 50,10) and that during the downtime of the post-processing device (60; 50; 10), said post-processing device is bypassed from the paper or board machine (15); / or treated with any of the post-treatment equipment (s) and rolled to a machine roll (Ri, Rn). Method according to Claim 1, characterized in that the method monitors the condition of the paper or board machine (15) and the machine roll (s) (R j, R n) rolled during the shutdown of the finishing device (s) (60, 50, 10) during shutdowns due to a paper or board machine finisher. Method according to Claim 1, characterized in that the machine rolls (Rj, RN) rolled up during shutdown of the post-treatment device (s) are post-treated with other similar on- or off-line post-processing device (s). 4 4 4 Method according to one of Claims 1 to 3, characterized in that in the method the untreated web is unwound from the machine roll during a shutdown caused by the paper or board machine finishing machine and is processed at different speeds than the normal running speed of the machine. · 5. A method of manufacturing a paper or board web, wherein the web is produced in an on-line manufacturing process in which the web is fed directly from a paper or board machine to a post-processing device (s), characterized in that method 30 follows a paper or board machine and a post-processing device. the state of the equipment, and the quality of the web being 10 107554, and if a web of inappropriate quality is detected, the web is rolled on a machine roll to transfer them to the mass atoms for processing. Method according to one of Claims 1 to 5, characterized in that in the method, the web (W) is wound into a machine reel (Ri, Rn) by means of a reel located in the post-treatment device (60; 50; 10). A method according to any one of claims 1 to 6, characterized in that in the method the web (W) is wound onto a machine reel (Ri, RN) by a reel (30) disposed after the finishing device (s) (60, 1Ό50, 10). Method according to one of Claims 1 to 7, characterized in that in the method the web (W) is both wound up and unwound with the same rewinder. A paper or board machine, which together with the post-processing device (s) (60, 50, 10) forms an on-line manufacturing process with the paper or board machine (15), characterized in that the paper or board machine (15) comprises means (61). 51, 11) for monitoring the condition of the paper or board machine and the finishing device (s), and means (42, 43) for guiding the web (W) made from the paper or board machine (15) 20 to a reel (Ri, Rn) and later unrolled when the capacity of the machine allows it. • · « Paper or board machine according to Claim 9, characterized in that the apparatus comprises means for unrolling the roll of machine roll (Ri, Rn) which is rolled up and means (13, 33, 43A, 43B) for guiding the web (W) for post-processing from the paper or board machine during an accidental shutdown. Paper or board machine according to Claim 9, characterized in that the reel is imaged in connection with a post-treatment device. 30 11 107554 Paper or board machine according to Claim 9, characterized in that the reel (30) is located downstream of the post-treatment device (s). Paper or board machine according to Claim 9, characterized in that 5 winder / unwinders (30) and unwinders / unwinders (70,70 ', 70 ") are arranged in connection with the after-treatment devices (60, 50, 10). Paper or board machine according to one of Claims 9 to 12, characterized in that the roller (30) is both closed and open. 10 φ 12 107554