FI100713B - Cylinder wheelchair and procedure - Google Patents

Description

100713 POPE ROLLER AND METHOD

The invention relates to a reel for winding a substantially continuous and moving web and to a method for winding a web.

In particular, the invention relates to a winder for winding paper produced in a paper machine. More particularly, the invention relates to a popper reel, in particular a reel which takes into account the problems caused by the transfer of a spool roll from primary forks to secondary forks.

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When producing high-quality papers, especially printing papers, the quality requirements are very high. The roll is placed at the end of the actual paper machine, where the produced paper coming out of the paper machine is formed on a roll * When rolling paper 15, problems occur especially at high speeds in the formation of wrinkles in the inner layers of the rolls so that the bottom of the rolls becomes waste paper. The proportion of paper going to the wreck can be as high as a few percent. Hardness / density variations in the bottoms of the paper roll are considered to be the main cause of wrinkling of the bottoms. These variations are largely caused by uncontrolled variations in the line load between the paper roll pope cylinder as well as variations in the tension of the rolled paper web.

25 In the case of a change of some winders, e.g. a pope winder, from the primary fork to the secondary fork easily there are discontinuities between the winding cylinder and the spool roll, e.g. line pressure spikes, which cause bottom wrecking.

30 In rolling, the most difficult part is the step of moving the roll from the primary fork to the secondary forks. In practice, there are significant variations in the line pressure, which can even break the web.

35 When the tamping roller is changed from the control of the primary fork to the secondary forks, the replacement does not take place smoothly because sliding and rolling friction occurs during replacement and in the worst case the friction types vary at the contact points of the primary fork and the tamping roller during the replacement. This results in changes in the tension of the rolled paper and thereby the roll is not flat / because it contains pleats, etc. Even if the pleat comes to only one point, the resulting failure can be repeated in different layers of the rolled paper.

In order to avoid the above-mentioned problems, it is already known to set the tension of the paper as high as possible, but then the susceptibility of the paper to breakage increases and the tensile strength and elongation can decrease.

It is also possible to increase the line pressure of the growing roller and the winding cylinder as much as possible by using an excessive load force in the support forks, in particular the secondary forks, with which the roller is pressed against the winding cylinder. Here, too, the tensile strength and elongation deteriorate. Attempts have also been made to provide a solution by making the change from the primary forks to the secondary forks as quickly as possible, so that the amount of paper to be wound on the roll to be wound is as small as possible during the changeover operation. Again, this arrangement does not remove the scrap but reduces its amount when operating.

The object of the invention is to provide such a winding event in which the above-mentioned problem is avoided. The object of the invention is to provide a reel in which there are no discontinuities causing a bottom wreck. In addition, it is intended to create a winder in which the nip load between the spool roll and the winding cylinder is uniform. The invention 30 is characterized by what is stated in the characterizing parts of the claims.

According to the invention, the rolling takes place at all times under stable conditions. It is also an object of the invention to improve the roll structure by reducing wreckage.

In accordance with the invention, discontinuities occurring in the paper reel change or transfer operation from the primary forks to the secondary forks can be eliminated, e.g. by means between the primary forks and the tamp roll roll enabling means enabling rotary movement of the spool roll at the primary fork contact points.

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The invention will be explained in the following with reference to the accompanying drawings, in which

Fig. 1 shows a poplar winder showing primary and secondary arms in a schematic side view, Fig. 2 shows the primary fork of a popper winder enlarged from the side, Fig. 3 shows a front view at one end of the pulley of the popper winder to which the primary crotch is attached.

15 Figure 4 is a schematic diagram of a pair of weight rollers.

Figures 1 and 4 illustrate one application of a popper winder. Figure 4 shows a schematic drawing of a pop reel and Figure 1 shows in more detail the solution according to the invention. The structure of the tampon-20 rolls 1 is for the most part before known. At both ends of the tampon roll there are shaft pins 2 on which are mounted bearing housings 3, inside which are bearings with which the shaft pins 2 of the tampon roll 1 are mounted on bearing housings 3. In the middle of the bearing housings 3 there can preferably be 25 grooves for mounting and securing bearing housings 3 for primary or secondary forks. or in connection with kites 4, 5, 16, 17.

The paper is wound in the space between the ends of the spool roller shaft.

The arms 7, 8 projecting upwards from the outside of the ends of the winding cylinder 6 are pivotally mounted at their lower ends. At the free other ends of these arms 7, 8 there may be guideways 9, 10 movable in the AB directions of the arrows, e.g. up-down or horizontally, as in Fig. 1, between the jaws 4, 5 of which the spool roll 1 can be closed, and which are moved cylinders 11, 12. The arm 7, 8 with the jaw 4, 5 is called the primary arm 7, 8. When the paper is started to be rolled on the spool roll 1, the spool roll 1 is brought into contact with the winding cylinder 6, between which a nip 13 is formed for the paper 14 to pass, wherein the spool roll 1 starts to rotate at the same speed as the winding cylinder 6, unless it has already been rotated separately, whereby it continues to rotate when it touches the winding cylinder 6.

The arms 7, 8 are in a substantially vertical position when the spool roll 1 is received (not shown in the figure) and they are started to be turned against the winding cylinder 6 in the direction of movement of the paper web 14. The tampon 1 is initially in the first position, not shown, in which it is on or almost on the po-winder 6. The paper 14 begins to roll around the spool 1 as the spool 1 is rotated by the spooling cylinder 6, after the paper going to the previous roll has been cut. As more and more paper 14 enters the spool 1 15, the primary fork 4, 5 guides the spool roll 1 as the paper 14 rolls down onto the roll towards the secondary forks 16, 17 and the pair of rails 18, 19 on which the actual rolling takes place. When the primary forks 4, 5 are approximately horizontal, the spool roll 1 rests on the rails 18, 19, and the roll 1 20 begins to be guided by the secondary forks 16, 17, which are moved by the cylinders 20, 21. In the exchange 18, 19 and the primary arms are lifted back to receive the next tuber roll and wait until the full roll has been moved away from the support of the secondary forks before the primary arms 4, 5 move the roll to the secondary arms 16, 17 and rails 18, 19.

When the spool roll 1 comes into contact with the winding cylinder 6, the paper going to the substantially full rolled spool. ri 14 is cut and the paper is made to rotate around a new spool roll counted against the winding cylinder.

The fully rolled spool is moved away and the secondary arms 16, 17 35 are turned to receive the spool roll 1 transferred by the primary arms 4, 5 to the rail base 18, 19, on which the paper has already started to be rotated. Cutting and rotating the paper around a new spool roll is a technique known per se.

5,100713

The movement of the primary and secondary arms is usually synchronized so that there is no interruption in the support. Also, the making of a new roll cannot start until the old roll is at a predetermined point.

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The winder comprises a winding cylinder 6, along the circumferential part of which the material web 14 passes, and against which the spool roll 1 is pressed. The winding cylinder 6 is rotated in a manner known per se by means of a drive motor (not shown). The roll cylinder 6 of the roller 10 rotates by means of friction a spool roll 1, the shaft ends of which are mounted.

According to the invention, a means 20 for enabling the rotation of the tampon roll 1 15 is arranged on the contact surface between the primary forks 4, 5 and the tampon roll 1. The means 20 is generally a bearing. The number of bearings 20 may vary, e.g. at least two or even more preferably three spaced apart bearings 20 provide a rotational contact between the inner surface 24 of the fork 24 and the outer surface 25 of the bearing housing. When at least one of the bearings 20, as shown in Figs. 1 and 2, is a braking bearing 21, the rotational speed at the point of contact can be adjusted. In Figures 1 and 2, the braking bearing 21 is realized by means of a shoe 23 loaded with a brake spring 22. An alternative may be, for example, a directly connected friction brake. The brake spring can be moved in the A-B directions of the arrows depending on the desired adjustment.

As shown in Figure 2, at least one of the bearings 20 is a rotation adjusting or braking enabling 3C bearing 21 for adjusting the rotational speed during contact. A bearing 20 can also be placed in the latch device of the fork 4, 5, which rotates relative to it when the tampon 1 is touched. Usually at least two bearings are needed and usually they are placed on the primary fork, the carriage.

3b

The bearings can be, for example, rollers parallel to the axis of the spool roll, which rotate in the opposite direction to the axis of the roll. They may be similar to those commonly used in a secondary arm fork. A bearing can be placed on the inner surface of the primary fork latch, against which the spool 1 can be rotated. The bearing 20, 21 can be detachable or fixedly mounted on the primary fork 4, 5. The bearing or the corresponding means 20, 21 can be rotated substantially coaxially with respect to the axis of the spool roll 1. It should be noted that Figure 1 shows both the primary fork and the secondary fork in two different paper winding stages. The roller is small in the primary fork and large in the secondary fork.

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Fig. 3 shows a front view on the other side of the shaft 2 of the spool roll 1 of the popper winder, around which a primary fork 4 is attached. The number 26 shows the spool roll switch. A so-called

15 double fork 4, i.e. it has two contact surfaces 4 with the axis of the spool roll 1. Bearings 20 and 21 are mounted on the outer surfaces of both branches 4, and in this case one of them is formed as a braking bearing 21 by shoes 23. Friction surfaces can also be used. Compressed air or hydraulic cylinders can also be used instead of spring 20.

Claims (10)

A wheelchair for rolling up a paper web or equivalent, said wheelchair comprising a carrier cylinder (6), a tambour roller (1) on which the paper web (14) is rolled, primary shafts (7, 8) stored at one end thereof at the area for the axis of the carrier cylinder (6) and having a fork (4, 5) at its other end for receiving the bearing pins (2) of the tambour roller (1), and a fork (16, 17) provided with a secondary shaft, wherein the tambour roller (1) ) can be moved from the first position of the primary shaft (7, 8), in which the tambour roller (1) is substantially above the support cylinder (6), to a second position in which the tambour roller (1) is adapted to substantially horizontal rails (18, 19). ), the fork of the secondary shaft (16, 17) being in contact with the shaft pins (2) of the tambour roller (1), characterized in that the primary shaft (7, 8) is provided with means (20, 21) for receiving the tambour roller (1) rotatably . A wheelchair according to claim Ϊ, characterized in that the means (20, 21) for receiving the tambour roller (1) are rotatably arranged between the inner surface of the fork (4, 5) of the primary shaft (7, 5) and the tambour roller (1). shaft pins (2). A wheelchair according to claims 1 or 2, characterized in that the means (20, 21) for receiving the tambour roll are rotatably arranged removably at the fork (4, 5) of the primary shaft (7, 8). A wheelchair according to any of the preceding claims, characterized in that the means for receiving the tambour roll (1) rotatably comprises bearings (20, 21) arranged to project from the inner surface (24) of the primary shaft (7, 8). ) fork (4, 5). 100713 5. A wheelchair according to any of the preceding claims, characterized in that a bearing (4, 5) is arranged in the latch in the fork (4, 5) of the primary shaft against which the tambour roller (1) can be rotated. 5 A wheelchair according to claim 4, characterized in that at least one of the means (20, 21) consists of a speed-adjustable bearing (21) provided with brake means (22, 23). 10 7. A wheelchair according to claim 6, characterized in that the brake means comprise a jaw (23) loaded with a brake spring (22). 8. A method of rolling up a paper web or equivalent, in which method the paper web (14) is rolled from the carrier cylinder (6) to the tambour roll (1), the tambour roll (1) is received with the primary shaft (7, 8), which from one end thereof are stored at the region of the axis of the carrier cylinder (6) and which have a fork (4, 5) at its other end for receiving the shaft pins (2) of the tambour roller (1), the tambour roller (1) being moved from the primary shaft (7, 8) substantially horizontal straight rails (18, 19), the shaft pins (2) of the tambour roller (1) being in contact with the fork (16, 17) of the secondary shaft. characterized in that the tambour roller (1) is rotatably received with means (20, 21) arranged in the fork (4, 5) of the primary shaft (7, 8). A method according to claim 8, characterized in that the shaft pins (2) of the tambour roller (1) are rotatably received with bearings (20, 21) projecting from the inner surface (24) of the fork (4) of the primary shaft (7, 8). 5). 100713 10. A method according to claims 8 or 9, characterized in that the rotational speed of the tambour roller (1) is controlled by bearings (21) provided with brake means (22, 23).