FI92031C - Arrangement in a wrapper feeder - Google Patents

Description

92031

The present invention relates to an arrangement according to the preamble of claim 1 in the winding feeding apparatus of a% paper roll packaging machine.

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In paper mills, the paper rolls are wrapped in a packaging wrapper with a wrapping station on the packaging line, where a wrap slightly wider than the width of the roll is wound around each roll to be packed and the ends of the arc are folded into the ends of the roll. The wrapper is fed by a wrapping station around the roll to be packed on the carrier rollers with a wrapper coil arranged 10 adjacent to the carrier rollers parallel to them. The furthest from the roll to be packed on the carrier rollers is the roll roll supported by the frame. Next is an arc ignition nip consisting of a traction roller and a pressure roller. The drawbar is rotated by the drawbar. Next is an arc-cutting device and a gluing device, which can be, for example, a heat-sealing device, which can be packed as a roll. In the device 15, the arc passes from the roll roll between the nip roll and the roll under the nip and under the cutting device and the gluing device to the nip between the roll to be packed and the carrier rolls.

The Kååre feeding unit is usually built on a frame. The unit has fastening members for one roll roll, or high-capacity devices have a roll magazine 20 which can accommodate several different roll rolls. The fastening members of the rollers consist of opposite seats fixed to the guides by means of end plates. The seats have conical center members that fit inside the core of the curved roll, and a plate-like thickening that rests on the sleeve and the end of the roll and stops the movement of the seats when the roll is attached between the seats. The seats are mounted on end plates, so that they 25 can rotate with the curved roller. A brake disc is attached to the same axle as the other seat. Opposite seat trolleys are connected to each other by a tensioning cylinder. There are two brake calipers on the circumference of the brake disc. The brake disc is used to stop the rotation of the roller when a sufficient amount of curve has been removed from the roller. The brake can also provide rolling resistance to the arc to keep the arc taut. When the curved roller is brought to the kaa-30 breast station, the movable end plate with its seats is pushed close to the roller head and the roller is tightened between the seats with a tensioning cylinder.

2 92031 The bale is pulled from the roll by means of a nip formed by a traction roller and a pressure roller. The pressure roller is mounted on a crank mechanism. The mechanism includes a crank and a full cylinder and allows the nip between the rollers to be opened to insert the wrapper into the nip and, if desired, to adjust the tightness of the nip. The drive roller is rotated with an electric-5 motor / gear combination attached to the side plate. From the nip of the drive roller, the curve runs under the cutting device and the gluing device to the core table. A cutting blade is used as the cutting device. The blade is attached to a toothed belt and the belt is moved by an electric motor / gear combination. The gluing device used is, for example, hot glue guns, which are also moved across the casing with a toothed belt and an electric motor / gear combination 10 or a heat sealing device.

The multi-roll wrapper has a separate draw nip for each wrapper, which is adapted to the width of the wrapper. Such equipment is very expensive and complex.

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Cardiac devices such as those described above have several weaknesses. The equipment is very complex and expensive. At the heart of the roll, a traction roller and brake devices are required to adjust the pull resistance of the roll roll and to stop the roll. In the case of multi-roller equipment, each roller must have its own braking and traction equipment. The rollers 2 must be lifted between the roller holders by a forklift or other lifting device, as the roller holders are located well above floor level. When the roll to be packed is changed at the wrapping station, the nip between the roll to be packed and the carrier rollers must be fed at the beginning of the wrapper. Sometimes the end of the wrapper does not go smoothly into the nip, but the wrapper is "stuck", in which case the wrapper has to be pulled back and fed again. Since the wrapper roll-25 does not have rotating devices, the wrapper cannot be pulled back onto the roll, but remains on the bag between the drawbar and the roll. When the wrapper heart is retried, it will work even more easily and may tear at the bag. When replacing the coulter, the end of the coulter must also be pulled back from the drawbar pin. With current equipment, the end of the wrapper cannot be rolled back onto the roll. Rapid retraction of the wrapper is particularly important when using an infrared heat sealer due to the risk of fire. The heat of the infrared heater easily ignites the stationary coil 3 92031 re.

It is an object of the present invention to provide a simpler arrangement for feeding a wrapper to a roll to be packaged.

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The invention is based on the fact that the curling roller is arranged on one rotatable drive roller and the feed nip of the arc is formed between the drive roller and the arc roller so that the arc roller is supported by support arms

More specifically, the arrangement according to the invention is characterized by what is set forth in the characterizing part of claim 1.

The invention provides considerable advantages.

The main advantage of the invention is the considerable simplification of the structure. When hydrogenating the curved roller with a load-bearing traction roller, a separate traction roller and no brake devices are required. The curved roll can be rotated on the traction roller in both directions, so that the curve can be pulled back onto the roll quickly and easily. This is especially important when using heat sealing devices, such as infrared devices, due to the risk of fire due to a stopped wrapper. Replacing the curved roll is easy either by means of swiveling roll support arms, or when using two draw rolls, the rolls can be placed at the floor level of the packaging machine, so that the roll can be simply rolled along 25 floors onto the draw rolls. Filling with a packing machine is essentially easier, and there is no need for a separate roller crane.

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The invention is explained in more detail below with the aid of the accompanying drawings.

Figure 1 schematically shows a side view of an embodiment of the invention.

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Figure 2 shows a side view of another embodiment of the invention.

At the packing station to which the adapter according to the invention relates, the roll '1 to be packed is arranged in the usual way on two carrier rollers 2. Alongside the carrier strip 2 in the figures, on the right-hand side, there is first a sealing device 3, which is preferably an infrared heater. In addition to the sealing device 3, there is a cutting device 4 for the crank S, for example a knife moving transversely. Next, there is an adapter strip according to the invention, by means of which the wrapper 5 is fed from a wrapper roll 6 to a roll 1 to be packed. for gripping.

When the roll 1 to be packed arrives at the wrapping station, it is started to be rotated on the carrier rollers 2 and at the same time the wrapper S is fed into the nip 15 between the roll 1 to be packed and the carrier rollers 2. The bend 3 then passes under the sealing device 3 and the cutter 4 to the nip and is pulled from the roll roller 6 by rotating the draw roll 7. The wrapping roller 6 rests on the traction roller 7 and thus its rotation speed determines the rotational speed of the wrapping roller 6 and the suction speed of the wrapping S. In order to keep the curtain taut during carding, a small speed difference is maintained between the curling roller 6 and the packing roll 1. When the wrapper 3 has been sufficiently wound on the roll to be packed 2 0, the end of the wrapper 3 is glued to the previous layers with a gluing device 3 and the wrapper is cut with a cutter 4. the end is pulled back onto the bobbin 6.

2 5 The change of the roller roll 6 takes place in the device of Fig. 1 so that the support arms 8 are turned backwards away from the traction roller 7 via the joint 11. The arms 8 are then pulled slightly apart. the roller 9 is introduced, for example, by rolling between the seats 10 and fastened to the support arms 8. The new roller is then lifted onto the traction roller 7 along a trajectory according to the circumference 12. As can be seen in Figure 1, the trajectory of the support arms 8 is arranged such that the center of gravity of the roll roller 6 is slightly 92031 5 laterally from the point of contact between the roll roller 6 and the drive roller. As the diameter of the roll roll 6 decreases, the center of gravity shifts along the curve 12 closer to the vertical line passing through the nip between the roll 7 and the roll 6. In this way, the nip force between the roll roller 6 and the traction roller 7 remains constant as the weight of the roll 6 changes, and the nip force does not have to be adjusted on the support arms 8 by pressing or relieving. The different positions and the small diameter roller of the support arms 8 are shown in Fig. 1 by broken lines.

The apparatus shown in Fig. 2 is otherwise similar to the arrangement of Fig. 1, but 10 has a feed arrangement for two roll rollers 6, 13. The feeding arrangement further away from the roll 1 to be packed is arranged so that the path of its wrapper 5 is straight, because the feeding distance from the farther roll 13 is longer and the wrapper is then easier to feed along a straight path. The arrangement closer to the roll 1 to be packed is placed above the path of the frame 5 of the distal roll 13, whereby the path of the frame 5 of the distal roll 13 passes closer to the draw roller of the roll 6. The track 15 of the lower roll 6 is folded for the cutting and gluing equipment by a folding roll 14.

In addition to the above, there are other embodiments of the present invention.

20 The positioning of the support arms and the replacement of the roller can be implemented in several ways.

In principle, how many rollers can be included in the arrangement for good, but in this case complex core rollers are required for the tracks of different arcs. The invention is therefore best suited for wrapping stations with a small or reasonable capacity, in which case it is possible to use 1 to 3 wrapping rolls at the same wrapping station. The use of the traction roll 25 7, 16 can, of course, be carried out in any known manner. The packaging apparatus for packing the roll, the gluing apparatus and the wrapper cutting device as well as other possible auxiliary devices can be implemented in the desired manner without departing from the idea of the invention.

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Claims (4)

1. Apparatus at the wrapping feeder for a paper packing machine. rollers, having 5 - a rotatable draw roll (7), on which a wrapping roll (6) can be arranged so that the draw roll (7) and the wrapping roll (6) form a nip for feeding a wrapping (5) to a roll (1) , to be wrapped, and to rotate the wrapper (6), 10 - means (3) for attaching the wrapper (5) to the roll to be wrapped (1), and - means (4) for cutting the wrapper (5), characterized by stretcher arms (8) arranged for each wrapping roll (6, 13) and provided with joints such that the center of gravity of the wrapping roll, when decreasing the diameter of the roll 20 (6), approaches the vertical line running through the nip between the draw roll (7) and the cover roll. Device according to claim 1, characterized by at least two draw rolls (7), both of which can be loaded with a wrapping roller (6, 13). 25 3. Device according to claim 1, characterized in that the stretcher arms (8) can be wound away from the pull roller (7) for co-picking a new wrapping roll (9) between the strut arms (8). 4. Apparatus according to any one of the preceding claims 1-3, characterized in that it has at least two wrapping roll stages, and that the wrapping roll state which is closer to the roll to be packed (1) is arranged above the web to the the outer cover (5). *