FI119502B - Method and apparatus for dismantling a reel - Google Patents

Description

119502

METHOD AND EQUIPMENT FOR DISCONNECTING THE RACK

The present invention relates to a method for dismantling a reel roll consisting of a paper or cardboard web by cutting and to an apparatus for applying the method.

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At paper and board mills, the reel rolls are dismantled and the material is returned to the process via a pulper. The released cores are either reused or incinerated.

There are several ways of disassembling a web of material. For example, the roller bottoms 10 are disassembled by rolling with the apparatus according to FI 71108. Larger tambourine rolls are also unwound by rolling. Open roll is a relatively slow method.

Cutting the reel by cutting the guillotine is a much faster way. Solutions are described, for example, in FI 61650, US 2804140, US 3675525 and GB 1131567. The disadvantage of unloading a reel with a guillotine is that it is difficult to control the flow of material. The access of unloaded material to the pulper in oversized batches may even block the pulper. Usually, the sleeve is also damaged so that it cannot be reused.

20 • · t “w • · ·,:, Disassembly of the drum roller using a planing shuttle has recently become commonplace.

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The advantage is sufficient unloading speed and good material flow control. The planers • · 1. · 2 ·, operate like a manual racing with a wooden plow ··· 1. . ·. previously carved with a spatula, the roll rolls open several layers at a time.

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.2 ··. 25 A more advanced embodiment of a Lusha-like planer is described in US

In Patent Publication No. 5715605.

• · • · · • · 3; US 4506575 describes a planing disassembly of a reel roll by means of a fixed, two-blade knife ··· Λ.

♦ · · ··· ••••••••••••••••••• 119502 2

The prior art description of US 3605542 describes the dismantling of a reel roll by plows. The solution described as an invention of the publication resembles a toothed chainsaw.

5 A solution similar to a chainsaw for dismantling a metal web reel is described in U.S. Patent No. 3204501. A plurality of freely rotating, slit-cut blades are disposed in the chain.

US 4,864,906 discloses 10 disassemblies for planing with a freely rotating blade.

Liquid jet disassembly is described, for example, in U.S. Patent No. 5,759,350. This publication also provides a comprehensive description of the prior art.

The major problem with the above described solutions closest to the present invention is in particular the uncertain peeling of the film layers. Regardless of the cutting method, the cut itself is successful, but in certain grades of paper and board, the cut off layers do not break. In addition to heavy material, the task may be further complicated by the fact that the reel rollers are sometimes stored even outdoors and, for example, due to humidity and temperature, the web layers are glued together. In order for the · · · "... unloading equipment to operate without occupation, the roll unloading must be trouble-free.

* ··. ·. In the automatic system, the cut webs are moved immediately, either by a slide or • ·. · · ·. through the conveyor, in a continuous stream to the pulper.

The solution described in the patents of EP 1178877 / SE 519378 combines • aa free-rotating / non-rotating blade with a planing cut and a plow. ·, ·. partial opening of the groove. Instead of a mechanical plow, tissue paper uses • a · • a. ***, air blowing. There are several disadvantages to the solution described in the publications. The invention a. *. The description / SE publication p.4, lines 27-28 / mentions the use of air jets only * · · 30 as plows, not how the air jets are positioned. The mechanical opening element, • · * a ”* plow, contributes only partially to the removal of the web layers. First, the plow 119502 3 acts only in the tangential direction of the roll to be unloaded, pushing the strips to the side only. The plow cannot penetrate under the layers of the webs. Further, the layers of webs cut in one cutting motion can only be plowed during the next cutting movement. The plow must be sufficiently located above the cutting edge 5 of the blade. This limits the ability of the automatic system to adapt to the pulp at a favorable flow rate. The easiest way to influence the mass flow is to adjust the cutting depth. Should the cutting depth exceed the height difference between the plow and the blade, instead of the blade, the plow should be cut. Thus, claim 4 of the EP publication mentions the blade extending deeper than the plow. The height difference must therefore be 10 at least the maximum cutting depth. The cutting depth when approaching the core can be of the order of 10 mm. This way, the last layers of strips closest to the core are completely plowed. However, these lightweight layers in particular would require removal aid. In the automatic system, when the core is being transported, they open uncontrollably and cause malfunctions.

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The embodiment according to Fig. 1 of EP 1178877 is not suitable as a basis for an automatic system. Feeding whole roll webs from platform to pulper binds the job and has the disadvantages of guillotine.

An automatic unloading system could be developed based on the embodiment of Fig. 2 of EP1178877. In this case, the description of the invention should be! ·· «supplemented by feeding the reel roll to the unloading system and by removing the sleeve to the cutting • * • ·, ···. after. The practicality of the embodiment is also limited by the following. ·. ills. The roll holders move on the arms 16.17 and raise the roll to the cutting edge as the advances toward a fixed height cutting blade. In this case, the wreck rolls of several, even ··· * tens of thousands and thousands of kilograms need to be lifted a few mm at intervals of a few seconds. This places considerable strain on the use of vertical shops.

• * # .1. Compressed air as a power source for cutting leads to high operating costs.

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• · ·!.! •!!! 30 outside. In this case, due to the roll oscillation, play and release tensions, etc., the return movement of the cutting blade often does not coincide with the previous movement • e · · f t · • · 119502 4. When successive cuts take place slightly adjacent to one another, narrow strips of web are formed from cut open layers that have not yet been plowed. Strips are very harmful. They drift into photocells and conveyor structures, causing malfunctions and increasing the need for cleaning measures 5.

It is an object of the invention to provide a method and apparatus for eliminating the disadvantages of the known solutions, and in particular to significantly improve the separation of the web layers. More particularly, the invention is characterized by what is set forth in the characterizing parts of the independent claims.

The invention provides considerable advantages. The precise orientation of the air jets under the removable film layers combined with the lifting plow effectively removes even heavy materials. The tip of the plowing release member may be located substantially at the same IS depth as the cutting blade, i.e. the bottom of the cutting slot. In this case, cut layers that have not been plowed aside will not remain in front of the next cut. The cutting position also does not change, because one of the blades may remain on the roll during the pivoting step. Therefore, no strips are formed. The seal roller can be dismounted automatically up to the sleeve and the sleeve will not be damaged.

··· 20 • · • · ♦, ·. The invention will now be described with reference to the accompanying drawings.

♦ · * ♦ · ♦ · ♦ • · · • · •. ···. Figure 1 is a side elevational view of a cutting and disassembly apparatus according to the invention.

Fig. 2 shows the cutting and dismounting members, viewed from above, with respect to the rotating blades · <«.

• · • · · • · ♦ • ·. ** ·. Figure 3 shows a partial sectional view of an automatic reject roller disassembly.

· «· • · • ♦ ♦ • ♦ * I.! 30 Fig. 4 shows a plowing blade, seen against the direction of motion, left side centered · · 1 cut.

«· • · · • ♦ · • · • 5 119502

In the embodiment shown in Fig. 1, the reel roll 1 is raised to a cutting position on the supports 12 inserted into the opening of the sleeve. The supports with the lifting arms 13 are illustrated in Figure 3. The supporting structures with the power and transmission means are known per se. The transmission may be effected, for example, by means of chains or screws.

In Figure 1, the shuttle shuttle 4 is located at a pivot position of a substantially horizontal shear movement of the shuttle. The bearing units 8, 10 which engage the cutting shuttle move in the direction of the guide 9 substantially parallel to the axis of rotation of the roller 1.

The shear transmission of the shuttle is effected by a technique known per se, for example a gear motor 14 and a toothed belt. The electric motor is preferably equipped with a frequency converter. The shuttle module moves vertically along the material web roll 1 with independent bearing carriages 15 of known construction and under the guidance of substantially vertical guides 15. The transmission is preferably implemented with screws, belts, chains or the like. The prior art solution is not described in detail. Two free-rotating blades 5,6 are attached to the shear shuttle 4. The bearings of the blades are made by a technique known per se. In the cutting direction, between the first and the last, ·; · (20 rotatable cutting blades 5.6, preferably in the center thereof) are located a double-sided plowing blade 7 disposed between the cutting edges 7a, 7b ···· release blades (7c, 7d) .The release effect of these is based on the lifting • • • ·, ··· plows and the correctly directed air jets.

··· 1 • e · • · · · ««. ···. 25 Lifting plowing means that the plow blades project below the cut sheet layers la and exert a tangential force on the cut material webs, in addition to the tangential force F.

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The directional edges 7a and 7b of the plowing blade are in the same cutting plane as the cutting edges 5 and ··· 6 of the rotating cutting blades A. The plowing blade 7 has • · · • · ·! 30 disposed air nozzles 10 and 11 substantially transverse to the direction of travel

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*! 1 disengaging blades 7c and 7d so that the air jets are directed to the sides of the cutting slot, between and / or underneath the cut webs, transversely to the cutting direction. In this way, the strip layers are removed through both lifting plowing and the interaction of air jets.

The plowing blade 7 is illustrated in Fig. 4 as viewed in the cutting direction. The left side is cut off at the flange edge 7c. The air jet from the nozzle 10 extends between the unopened surface of the detached web layers 1 and extending the lifting action on the detached web layers beyond the action area of the release flap 7c. The air jet also causes the detached web layers 10 to slightly penetrate, which enhances the removal.

In the preferred embodiment, the tips 7aa and 7bb of the cutting edges of the cutting blade 7 are located on a common tangent to the cutting edges of the rotating cutting blades S and 6, which coincides with the bottom of the cutting groove. This embodiment is most suitable for cutting strong paper and board.

The plowing blade 7 engages the shuttle 4 via a height adjusting device 21. Implemented by a technique known per se, the position of the plowing blade relative to the rotating blades can be adjusted, automatically or manually. Manual adjustment can be effected ..... 20 preferably by screws, wedges or the like, and automatically by actuators in place of · · · *, ·. Alternatively, the control unit may be connected to the rotary blade mountings.

• * • · ··· • ♦ • · ···. ·. In one embodiment, the plowing blade 7 is set with so many rotating blades 5,6 · · · ···. ···. 25 closer to the roll of material web 1 that only the blade blade 7 cuts, and the jets of air · · ··· projecting between and / or under the web layers release them. That embodiment. V. especially suitable for cutting soft materials.

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Operation of the automatic reject and discharge system shown in Figure 3 • · *!. 30 occurs as follows. Of the brackets, at least the inlet side of the bracket roll 1 is supported by the bracket 12 above the bracket roll. The sealing roller is moved between the brackets by a conveyor 16. The brackets 12 lower to the height of the opening of the sleeve 17, extend and raise the bracket roller 1 to the unloading position. The dip plate 18 is raised to be pulled into the pulper to position 18b. Thereafter, the horizontal guide 9 of the cutting shuttle 4 lowers the mower to the initial height of cutting, the cutting process starts and proceeds as described above. The disassembled material webs slide along the collet plate to the pulper 20. Once the collar web material has been disassembled, the collet plate rises to position 18c. The brackets 12 are disengaged from the sleeve 17, whereby the sleeve drops onto the collector plate and rolls into the collection box 19. The collar plate descends to the evasion station 18a.

Many other embodiments are possible. Most importantly, however, after the free-rotating blade in the cutting motion, there are disengaging members which, in the same cutting motion, contribute to the removal of the layers of webs cut with the same cutting motion. It is also essential to assist in the removal of the cut webs by means of precise air jets directed to the sides of the cut groove 15 between and / or below the cut webs, substantially transverse to the cutting direction. In the most preferred embodiments, both the handling and the unloading of the reel roll by cutting are performed automatically.

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Claims (10)

A method of cutting up a projecting roll (1) consisting of paper or cardboard web into a automatic system, step by step, with pivoting back and forth pivoting cutting movements substantially in the direction of rotation of the roll (1), either plowing or rotating cutting insert, characterized in that the cutting element follows the cutting blade which rotates freely during the cutting motion, whose edges (7a, 7b) parallel to the running direction move in the cutting plane A, and which removal elements already participate in the removal of web bearings which have been cut in connection with the same cutting motion. out with the same cutting motion. Method according to Claim 1, characterized in that the detaching action of the detaching element (7c, 7d) is based on lifting plowing, which on the foamed webs directs a force F which lifts them out from the material web roll. 15 Method according to claim 1, characterized in that the release of the foamed web bearings is assisted by air jets, which in the foamed danger are aligned between the foamed web bearings and / or underneath them transversely in the direction of cutting motion. Method according to any of the preceding claims, characterized in that the web bearings 20 are released by the cooperation of both the lifting plow and the air jets. 5. A system for shearing up a projection roller (1) consisting of paper or cardboard web in an automatic system, step by step, with back and forth pivoting cutting movements substantially in the direction of rotation axis of the projection roller (1), either with a plowing or rotating inserts, characterized in that a pendulum cutting device (4) has at least two cutting, freely rotating blades and between the blades, detaching elements arranged in the cutting direction. Plant according to claim 5, characterized in that the cutting edges of the blades are on the same cutting plane (A). Plant according to any of the preceding claims, characterized in that the outer blades (5,6) are rotating and a plowing insert (7) has been placed therebetween, the release elements being placed between its cutting edges (7a, 7b). 119502 Installation according to any of the preceding claims, characterized in that the release elements comprise air nozzles (10, 11). Plant according to any of the preceding claims, characterized in that the tips (7aa and 8bb) of the cutting edges (7) of the plowing cutter (7) are on the common key of the cutting edges of the cutting blades (5, 6), which coincides with the bottom of the cutting cutter. Plant according to any of the preceding claims, characterized in that the plowing insert (7) can be brought closer to the material web roller (1) than the rotating blades (5,6).