FI121461B - A method for treating empty winding shafts to be applied to a fiber web winder - Google Patents

Description

A method for treating empty winding shafts to be applied to a fiber web winder

The present invention relates to a method for treating empty winding shafts introduced onto a fibrous web winder, wherein the machine reels formed by the reel are treated in one or more post-winding process steps, and the thus discharged winding shafts are transferred back to the rewinder.

10 As is known in the art, paper is produced 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 can exceed 2000 m / min (120 km / h) and the width of the paper web can be over 11 m.

15

In the prior art papermaking lines, papermaking is a continuous process. A paper web made from a paper machine is rolled around a reel axis, a reel spool, into a machine roll, which can be up to 5 m in diameter and over 160 tons in weight. The purpose of the reel • · * 20 is to convert a flat paper web into a more manageable shape. With the scroller, the continuous process of the paper machine is interrupted for the first • · · time and switches to intermittent operation. This periodicity • ·: aims to achieve the best possible efficiency so that the work already done is not wasted.

25 ... The web of papermaking machine roll is full-width and even more than 100 km long, so it has to be cut into sheets and lengths suitable for paper mill customers and rolled around the cores. customer rolls I. / before shipment from the paper mill. This web longitudinal section and the roller • • • • • • • • • • • • • • • • 30 us takes place in a separate, · ·: *** machine known as the prior art, or in the winder.

• · • · · · · · · 2

As is known in the prior art, in a winder, the machine reel is unwound, the wide web is cut by a cutting member into a number of narrower subwires which are wound by a reeling member around reel cores such as cores to customer rolls. When the customer rolls are ready, the winder is stopped and the rollers, or so-called rollers, are stopped.

5 removal is removed from the machine, after which the process is continued as a new move. These steps are repeated periodically until the paper runs out of the machine roll, whereby the machine roll is replaced and operation begins again as a new machine roll.

10 In prior art high-speed papermaking lines, a paper machine may produce more paper than a single winder can handle, requiring more winders, which are normally positioned parallel to the machine line and spaced apart. Often, a space between them is provided with a machine control station 15 or similar arrangement.

In prior art layout arrangements, the first winder is typically provided in a so-called. inline winder, which means it is in line with the paper machine, the main • ·: 20 machine line. Another winder is the so-called. an offline cutter, that is, not located on the center line of the paper machine, but normally adjacent to the first cutter, • • · in its side ship, that is, in the extension of the hangar built for that purpose.

• ·: ··: Both cutters produce customer rolls, which are transported by a roller conveyor • team to, for example, a roll wrapper for packing and finally to a warehouse 25 before being shipped to customers.

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In prior art winders, the machine reel for a paper machine line, but · but not connected to a paper machine on a transfer rail, is normally brought in by a hall crane and lowered to transfer rails that are typically • · 30 spaced with a center of the machine. , 5 m. In applications where a paper machine reel and a winder are combined with transfer rails, the machine roll is moved along the transfer rails from the reel to the cutter.

Prior art full machine roller transfer rails consist of horizontal vane rails or inclined rails with a waiting station. On the transfer rails, the machine roll is moved from the waiting station to the other until the unrolling station. On horizontal transfer rails, transfer is made by a transfer device and on inclined transfer rails by gravity by rolling machine roll along inclined transfer rails, whereby the waiting stations are provided with mechanisms for holding and releasing the machine roll py-10 towards the unroll position.

As is known in the art, the unwinding station typically consists of two unwinding arms (care and drive side) which support the machine reel during unwinding. Unlocking arms are hinged with locking arms which lock the machine-15 roller in place during unwinding. The machine reel in the unrolling position is connected to a brake generator which acts as a drive for the unroller.

As is known in the art, generally the • •: 20 drill roll, which is deflated after unrolling, is removed from the unrolling station either manually:.: V by lifting a lifting crane or automatically by the reel handling equipment. The reel roll handling equipment consists of either vertical lifting gear • · • · · ”· '· * or swiveling lift arms and overhead empty reel reel rollers. An empty or nearly empty reel reel is lifted by a lifting device or • 9 * · * · '25 lift arms on the return rails, which normally have more than one return position. Typically, the recovery station (reel store) is located • above the 9 9 9 9 9 block or the longitudinal and winding section. On the return rails 9 9 the reel roll is moved from one station to another either by means of a transfer device or by gravity scrolling by means of stop and release mechanisms. • · 30: The empty reel rolls from the return rails are removed and transferred to the paper machine reel • ·: ** 'by a hall crane or partly by a machine roller carriage.

• 9 • · 9 9 9 9 9 9 4

Arrangements of the prior art require different lifting movements in one or more stages, and generally a crane is used. The crane can typically be a roof crane or a floor-mounted gantry crane. Usually the crane is manually controlled by the operator. Some of the crane functions can be automated, for example, by the operator acknowledging the starting position and address and the end address and instructing the crane to perform lifting, moving and lowering automatically. Also, a substantially fully automatic arrangement of crane shafts handling based on the use of cranes may be implemented, however, which requires closed safety zones or similar safety arrangements 10 which increase the cost of the arrangement. Raising high-mass roller shafts up to 30 t will expose the shafts and their bearings to various impacts and cause considerable forces on the rail structures and foundations, which require reinforcement of the structures and thus additional costs.

15

It is an object of the present invention to provide a method for substantially eliminating the problems and disadvantages described above.

In order to achieve the objects of the invention, the method according to the invention is characterized in that the method introduces an empty winding shaft into a reel of a reel in a process order to a position in front of the reel reel of the reel.

The invention will now be described in more detail with reference to the figures in the accompanying drawing, ♦ ♦ *** 25, in which:

Figure 1 is a side elevational view of a winder arrangement in which the present invention may be practiced, Figure 2 is a top plan view of Figure 1, and 5

Figure 3 is a side elevational view of another longitudinal disciplinary system in which the present invention may be applied.

Figures 1-2 show schematically a winder arrangement in which the method of the present invention can be applied. The arrangement shown in the figures includes a reel 1, in which a reeling cylinder 4 winds a paper web made from a papermaking machine (not shown) into a machine reel 3 around a reel axis or reel 2. The finished machine rolls 3 are moved 10 along the transfer rails 15 to the waiting station 5, from where the machine rolls 3 are further transferred along the transfer rails 10 to the unrolling station 11 of the winder 10. In the embodiment shown, the unrolling station 11 is in machine plane M The longitudinal cutting and winding portion in the basement space of the length cutter may consist of a single assembly comprising both a longitudinal cutting and a winding portion, or the length cutting and winding portion may consist of two separate assemblies, one comprising a longitudinal section and the other. From the waiting station 5, the machine rolls are unrolled in the unrolling station 11 and after unrolling the empty reel reel 2 j. · * · 20 is moved to the return station 14 which acts as a storage space for the empty reel reels 2:. V and if paper reel remains on reel reel 2. to dismantle the wreckage layers by placing a pulper (not shown) below the recovery station. At the point of unloading, the machine roller rotator • · * ·: ·: Rolls the bottom layers of the machine roller to the pulper. The same space and equipment can also be used to remove any bad paper layers on the machine roller, or even to disassemble the entire wreck machine roller into the pulp. In the above arrangement, the machine roll transfer rails are so-called. scrolling • · *: * 'model, i.e. the unwinding station is also scrollable, making handling of machine rolls / scrolling axes straightforward and simple.

In the method according to the invention, moving the empty winding shafts from the return position is advantageously carried out by a lateral movement, e.g. by means of a trolley 20 on the floor surface, whereby the carriage can be further transported to the winder and the winding roller 4 of the winder. by moving from the side to the previous one. For the purposes of this application, a reel roll means a reel reel or the like of a reel 5 against which the machine reel is formed. Preferably, the passage of the conveyor path of the roller shafts 2 is such that the height position of the roller shafts is not substantially changed during the transfer step (s). Substantial change refers to the maximum height difference with respect to the roller roller roller at least over the spindle axis radius or, in the case of a gravity machine roller transfer rail, over the entire machining area of the machine rollers. Fig. 2 illustrates schematically the transfer path of the reel shafts from the storage location 14 to the position upstream of the reel reel 4 by means of arrows A-C.

Figure 3 schematically illustrates an alternative winder arrangement in which corresponding parts with Figure 1 are denoted by like reference numerals. The arrangement of Fig. 3 differs from the arrangement of Fig. 1 in that the winding portion 12 of the longitudinal and customer rolls is also disposed substantially in machine plane M. In this arrangement: 20 empty bobbin space 2 consisting of unrolling station 11 and longitudinal and winding station 12, and thereafter by means of said transport trolley in a lateral displacement movement away from the unrolling station.

By moving the winding shafts in a controlled and controlled manner substantially horizontally during the various stages of the transfer, the bumps on the shafts and their bearings are eliminated and the rail structures and • · * ·; foundation forces. The dynamic coefficients used in the design can be reduced and saved in material costs. This is particularly important as the weight of the reel shafts continues to increase, with masses up to 30 tons today. The solution according to the invention does not require a substantial displacement of the winding axis in or against the direction of gravity. Horizontal displacement of the roller shaft 7 is effected, for example, by a roller carriage, an air cushion wagon, a conveyor, a forklift truck, a lock or similar device substantially different from the crane. The wagon may be supported on the floor, e.g. by wheels, by air cushion or rails arranged on the floor, or by rails / guides on the side or above of wagons supported on the floor 5. The reel shaft return chain to the position prior to the reel may operate fully automatically from the following process steps, either in the most preferred embodiment, with the reel being shifted to the side following the unlocking position (s) of the next process steps by a transfer device such as a roller carriage. a partial function, after which the winding shaft is moved by means of a transfer device, such as a roller carriage, up to the position preceding the winding roller of the retractor.

The solution according to the invention does not extend the machine layout, because the quality measuring devices or the like are, if necessary, placed at a different level relative to the transmission path of the winding shaft. The method according to the invention can be carried out in any connection with a reel of paper, board or tissue.

: 20 The solution according to the invention enables the handling of the fully automatic winding shafts and the safety arrangements required therein to be carried out more easily and cheaply than in a crane-based arrangement.

\ The safety arrangements can be implemented, for example, with the principles of currently used roller carriage ·, · ['solutions (motion detectors, etc.) without the use of closed safety zone arrangements required by crane automation ··· 25.

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Claims (3)

A method for treating blank winding shafts (2) introduced on a fibrous web reel (1), the method comprising treating the reel-forming machine reels (3) in one or more process steps after the reel (1) and transferring the deflated winding shafts (2) characterized in that, in the method, the empty reel shaft (2) is introduced from the point after the reel (1) to the reel (1) by means of a transfer device (20) extending on the floor surface or structures supported on the floor; and that the passage of the moving path of the winding shafts (2) is arranged such that the height position of the winding shafts is not substantially changed during the transfer phase (s). 15 Method according to Claim 1, characterized in that the transfer device is a carriage of winding shafts (2) arranged to run on tires, rails or by means of an air cushion. 1 2 3 4 5 Method according to claim 1 or 2, characterized in that the transfer means 2 are used after the process step after unrolling roller (1) to move the empty winding shaft (2) aside from the process line and 4 further to the winder (1) in process sequence before the roller 5 rolls. (4).