EP0595229A2 - Method and device for winding a continuous fed material web on a number of winding cores - Google Patents

Abstract

Shortly before the removal of a finished roll (55) from the main winding point (6), a drive mechanism (16) is coupled to a winding core (8) disposed in a stand-by position (57). Said drive mechanism (16) drives the winding core (8) before the latter is placed on the material web running over the winding drum (2). The winding core (8) continues to be driven until the winding core (8) with material web already wound thereon has been transferred to supporting arms (3) at the main winding point (6). By virtue of the continuous driving of the winding core (8) during a roll change, high-quality rolls (55) can be wound with an extremely wide variety of material webs. <IMAGE>

Description

The present invention relates to a method and a device for winding a continuously supplied material web onto a number of winding cores.

The fact that when changing roles, i.e. When a finished roll is removed from the winding device, the empty winding cores are driven before being placed on the material web running over the winding drum and remain driven during the subsequent winding of the material web, material webs with a wide variety of material properties can be wound into high-quality rolls.

Fig. 1

in Seitenansicht eine Aufwickelvorrichtung der erfindungsgemässen Art,

Fig. 2

in Seitenansicht einen Teil der Vorrichtung gemäss Figur 1,

Fig. 3

einen Schnitt entlang der Linie A-A in Figur 1,

Fig. 4

einen Schnitt entlang der Linie B-B in Figur 3,

Fig. 5

einen Schnitt entlang der Linie C-C in Figur 4, und

Fig. 6-12

in einer der Figur 1 entsprechenden Seitenansicht die Aufwickelvorrichtung in verschiedenen Zeitpunkten des Aufwickelvorganges.

An exemplary embodiment of the subject matter of the invention is explained in more detail below with reference to the drawing. It shows purely schematically:

Fig. 1

a side view of a winding device of the type according to the invention,

Fig. 2

a side view of part of the device according to Figure 1,

Fig. 3

2 shows a section along the line AA in FIG. 1,

Fig. 4

4 shows a section along the line BB in FIG. 3,

Fig. 5

a section along the line CC in Figure 4, and

Fig. 6-12

in a side view corresponding to Figure 1, the winding device at different times of the winding process.

The structure of a preferred embodiment of a winding device according to the invention is described below with reference to FIGS. 1-5.

In a machine frame 1, which is only partially shown in Figure 1, a winding drum 2 is rotatably mounted. This winding drum is driven in a known manner, not shown, in the direction of arrow D about its axis 2a. Seen in this direction of rotation D of the winding drum 2, the latter is followed by a pair of support arms 3, of which only one support arm is visible. Each support arm 3 is pivotally mounted in the frame 1 about an axis 3a in the direction of arrow A. 1, which has a fluid-actuated piston-cylinder unit (not shown), such as that from US Pat. No. 4,191,341 and CH-A-666,014 (or the corresponding US Pat. A-4,552,317) is known per se. Each bearing arm 3 has a bearing 5 at its free end for receiving the winding shaft of winding cores. In the position of the support arms 3 shown in FIG. 1, they define a main winding point 6 with their free end.

Above the winding drum 2 there is a feed 7 for empty winding cores 8. This feed 7 has holders 9 which are fastened to two chains 10 which can be driven circumferentially in the direction of the arrow B, of which only one chain is visible in FIG. The winding cores 8 lie with the ends of their winding shaft 11 on these holders 9. A sleeve 12 (or also several sleeves) is pushed onto the winding shaft 11.

On both sides of the winding drum 2 1 rotating arms 13 are arranged on the frame, of which only one rotating arm is also visible in Figure 1. These rotating arms are rotatably supported about the axis of rotation 2a of the winding drum 2. The rotary arms 13 are pivoted about the axis of rotation 2a by means of a drive, not shown, in a manner still to be described.

So far, the winding device shown corresponds in principle to known winding devices, such as those e.g. are known from US-A-4,191,341.

In Figure 2, the construction of the rotary arms 13, which each serve to receive a winding core 8, is shown more clearly. Each rotating arm 13 has at its free end a receiving opening 14 which serves to receive the winding shaft 11 of a winding core 8. A hold-down 15, which can be pushed back against spring force, projects into this receiving opening 14 and serves to hold the winding shaft 11 in its position in the receiving opening 14 and thus to prevent the winding shaft 11 from shifting during its rotation in the receiving opening 14.

A drive mechanism, generally designated 16, is provided for driving the winding cores 8, the exact structure of which can be seen in FIGS. 3-5. This drive mechanism 16 has a swivel arm 17 which is rotatably mounted in a holding plate 19 by means of a projecting hollow shaft 17a via a bearing 18 (FIG. 3). This holding plate 19 is fastened to the base frame 1 via fastening elements 20. The arrangement is like this met that the pivot axis 17 'of the pivot arm 17 is aligned with the axis of rotation 2a of the winding drum 2. At the end of one part of the two-armed swivel arm 17, a drive 21 engages, which is designed as a pneumatic piston-cylinder unit. The cylinder 22 of this drive 21 is pivotally attached to the base frame 1 at its end 22a. The piston rod 23 of the drive 21 is articulated to the swivel arm 17 at its end 23a. At the end of the other part of the pivot arm 17, a coupling arm 24 is pivotally arranged. To mount this coupling arm 24, a bearing part 25 is provided on the swivel arm 17 (FIG. 3), in which a shaft 26 is rotatably arranged. The coupling arm 24 is rotatably mounted on this shaft 26. The coupling arm 24 has an extension part 27, on which the piston rod 28 of a pneumatic piston-cylinder unit 29 engages. A further pneumatic piston-cylinder unit 30 is connected to this piston-cylinder unit 29. For this purpose, the cylinders of these two piston-cylinder units 29, 30 are firmly connected to one another with their bottoms. The piston rod 31 of the second piston-cylinder unit 30 engages adjacent to the end 23a of the piston rod 23 of the drive 21 at one end of the swivel arm 17, as can be seen from FIGS. 1 and 3.

As can be seen from FIGS. 3 and 5, a bearing part 32 is arranged on the coupling arm 24 at its end opposite the extension part 27. Inside this bearing part 32, a shaft 33 is rotatably mounted, on which a gear 34 is keyed. This gear 34 serves to engage a further gear 35 which is seated on the end 11a of the winding shafts 11. 3-5, the coupling arm 24 is shown in its engaged position, in which the gears 34 and 35 are in engagement with one another.

To drive the shaft 33 and thus the gear wheel 34, a belt wheel 36 is arranged on this shaft 33, which is connected via a belt 37 to a second belt wheel 38 which is fastened to the shaft 26 at one end thereof. At the opposite end of the shaft 26 a further pulley 39 is attached, which is connected via a belt 40 to a pulley 41 which is seated on a shaft 42 which is rotatably mounted in the interior of the hollow shaft 17a of the swivel arm 17. A second pulley 43 is arranged on this shaft 42, which is connected via a belt 44 to a pulley 45 which is seated on the shaft 46a of a drive motor 46. This motor 46 is attached to the frame 1, as can be seen from FIGS. 1 and 3.

At its end having the bearing part 32, the coupling arm 24 carries a holding part 47, in which a clamping bolt 48 is slidably mounted in the direction of the arrow C (FIG. 4). This clamping bolt 48 is arranged on the piston rod 49 of a pneumatic piston-cylinder unit 50 which is fastened to this holding part 47. When the coupling arm 24 is in its coupling position, the extended bolt 48 serves to clamp the outer ring of a ball or roller bearing 51, which is applied to the end 11a of the winding shaft 11 (see in particular FIGS. 4 and 5). A cylindrical counter surface 52 (FIG. 4) is formed in the holding part 47, which lies opposite the clamping bolt 48 and on which the outer ring of the ball or roller bearing 51 comes to rest, as can be seen from FIGS. 4 and 5. When the clamping bolt 48 is extended, the outer ring of this ball or roller bearing 51 is thus clamped between this clamping bolt 48 and the counter surface 52 mentioned.

On the end 11a of the winding shaft 11 there is another ball or roller bearing 53 (FIG. 5), which comes to rest in the receiving opening 14 of a rotary arm 13.

The mode of operation of the winding device is now explained in more detail with reference to FIGS. 6-12, the reference symbols used in these figures corresponding to those in FIG.

Figure 6 shows the drive device in its normal position, which it usually, i.e. during the formation of a role at the main winding point 6. In this FIG. 6, the material web (e.g. a plastic film) continuously fed in direction E and running over the winding drum 2 is denoted by 54 and the roll forming in the main winding station 6 by 55. The winding of the material web 54 to the roller 55 rotating in the direction of the arrow F takes place in a manner known per se with or without driving the winding shaft mounted in the bearings 5 of the support arms 3. In the following description, it is now assumed that the winding shaft mounted in the support arms 3 is driven by means of a drive, not shown, as is known per se from US Pat. No. 4,191,341 already mentioned earlier.

In this basic position of the drive device 16, the piston rod 23 of the drive 21 is fully extended. The swivel arm 17 is in its rear end position. In contrast, the piston rods 28 and 31 of the piston-cylinder units 29, 30 are fully retracted, which means that the coupling arm 24 is held in its rear end position. The drive motor 46 is stopped. The rotary arms 13 are also in their basic position (6 o'clock position). In Figure 6 (and also in the following FIGS. 7-12), the separating device 56 for the material web connected to the rotating arms 13 is also shown, which is also of a known type.

FIG. 7 shows a point in time shortly before roll 55 is completed. The feed 7 has been set in motion for a short time and has lowered the winding core 8 from the position shown in FIG. 6 into the waiting position 57. In this waiting position 57, the winding core 8 does not yet touch the material web 54 running over the winding roller 2. The winding shaft 11 is aligned with the receiving opening 14 of the rotary arms 13, which in the meantime have been rotated from their basic position in the direction of the arrow G into the take-over position shown in FIG. The parts of the drive mechanism 16 still assume their basic position described with reference to FIG. 6. As FIG. 7 further shows, the material web 54 now runs over the separating device 56.

Now, as shown in FIG. 8, the drive mechanism 16 is coupled to the winding core 8 which is in the waiting position 57. For this purpose, the piston-cylinder unit 30 is activated and its piston rod 31 is extended. The coupling arm 24 is pivoted clockwise into the operative position in which the gear 34 comes into engagement with the gear 35 on the winding shaft 11 and the counter surface 52 of the holding part 47 on the outer ring of the ball or roller bearing 51 on the winding shaft 11 comes to circulation. Then the piston-cylinder unit 50 is activated and the clamping bolt 48 is extended, as shown in FIGS. 3-5. The winding shaft 11 of the winding core 8 which is in the waiting position 57 is now firmly coupled to the drive mechanism. The drive motor 46 is switched on and the winding shaft 11 and thus the winding core 8 is in the Driven counterclockwise, with a peripheral speed that corresponds to the speed of movement of the material web 54. Thus, the winding core 8 is brought to synchronous speed before it is placed on the winding roller 2.

After coupling the coupling arm 24 to the winding shaft 11, the piston-cylinder units 21, 29 and 30 are depressurized, i.e. the piston rods 23, 28 and 31 can participate in the movements of the swivel arm 17 and the coupling arm 24 practically without resistance.

Now the driven winding core 8 is lowered from the waiting position 57 and brought into contact with the material web 54 running over the winding drum 2. This lowering of the driven winding core takes place, on the one hand, under the action of gravity and, on the other hand, by means of the feed 7 which is set in motion again (FIG. 9). Immediately before the winding core 8 is placed on the material web 54, the latter is severed by means of the separating device 56. The end 54 ′ of the material web 54 lying behind the separating device 56 in the direction of movement of the material web 54 is still wound onto the roll 55, while the following part is wound onto the winding core 8, which is still driven, at an auxiliary winding station designated 58 in FIG.

The support arms 3 with the finished roller 55 are then pivoted away from the main winding point 6 in the direction of arrow A, as shown in FIG. The finished roll 55 is now removed from the support arms 3 and carried away. The support arms 3 are then pivoted back into the winding position.

In the meantime, a new roll 59 is formed in the auxiliary winding station 58.

Now the rotating arms 13 are rotated from the takeover position in the direction of arrow G (clockwise), the winding core 8 or the new winding 59 being moved from the auxiliary winding station 58 to the main winding station 6 (FIG. 11). During this pivoting movement, the winding core 8 continues to be driven. Since, as mentioned, the piston-cylinder unit 21 is depressurized, the swivel arm 17 can participate in the swivel movement. The coupling arm 24 is also free to pivot in accordance with the growing diameter of the new roller 59. When the rotary arms 13 have reached the transfer position shown in FIG. 11, the winding core 8 or the new roll 59 is transferred from the rotating arms 13 to the support arms 3. After the transfer core 8 has been transferred to the support arms 3, the one assigned to the support arms 3 is transferred Drive for the winding shaft 11 started and the drive mechanism 16 disengaged (Fig. 12). The latter is done by withdrawing the clamping bolt 48 into the retracted position and pivoting the coupling arm 24 up by means of the activated cylinder-piston unit 30.

The rotary arms 13 are rotated back into their basic position (FIG. 6). Likewise, the pivot arm 17 is pivoted back into the basic position by activating the piston-cylinder unit 21.

At the main winding point 6, the next roll 59 is now completely wound, as already mentioned. Shortly before the roll 59 has reached its given size, the next roll change is initiated and carried out, as explained above with reference to FIGS. 7-12.

The fact that when changing the reel the empty winding core 8 is driven before being placed on the material web 54 running over the winding drum 2 and remains driven during the entire phase of the reel change, it is possible to reel even with materials that are difficult to wind up to get very high quality.

Some variants of the exemplary embodiment shown are briefly described below.

Pneumatic units are preferably used for the piston-cylinder units 21, 29 and 30, which has the advantage over solutions with other printing media that the transfer of the winding cores 8 to the rotary arms 13 and from the latter to the support arms 3 is independent of the tension in the material web 54 can be done.

Instead of the two piston-cylinder units 29, 30 which are connected to one another, a single piston-cylinder unit can also be used, but this requires more complex control since the piston not only has to be held in the end positions but also in intermediate positions.

Coupling the coupling arm 24 to the winding shaft 11 in the radial direction has the advantage that a better adaptation to the diameter of the roller 59 forming on the winding core 8 is possible and that no axial forces occur. However, it is also conceivable to couple the drive mechanism 16 in the axial direction to the winding shaft 11, for which purpose corresponding coupling parts are to be provided both on the end face of the winding shaft 11 and on the drive mechanism 16.

The construction of the drive mechanism 16 described with reference to FIGS. 3-5 makes it possible to design it as a separate structural unit which can also be retrofitted to already existing winding devices. Due to the described power transmission from the drive motor 46 to the gear 34 by means of a belt drive, the drive motor 46 can be arranged stationary on the base frame 1.

The winding device described can also be used for winding material webs, i.e. Plastic sheeting, on which no pressure should be applied. In such material webs, the winding takes place at the main winding point 6 on the roll 55, as is known per se, in such a way that there is always a gap between the roll 55 and the winding drum 2 (so-called gap winding). In such a case, the driven winding core 8 is lowered from the waiting position 57 only to such an extent that there is a gap between the winding core 8 and the material web 54 running over the winding drum 2. During the movement of the winding core 8 from the auxiliary winding station 58 to the main winding station 6, i.e. A gap is then maintained during the rotation of the rotary arms 13 from the take-over position into the transfer position. The material web 54 is thus never pressed against the winding drum 2 even during the roll change.

Claims (12)

Method for winding a continuously supplied material web onto a number of winding cores, characterized by the following steps: a) the material web (54) is guided over a rotatably mounted winding drum (2) and wound onto rolls (55, 59) of a given size at a main winding point (6) on winding cores (8), b) shortly before a roll (55) forming at the main winding point (6) reaches its given size, a drive device (16) is coupled to an empty winding core (8) which is in a waiting position (57), which drives the winding core (8 ) drives at a peripheral speed that corresponds to the speed of movement of the material web (54), c) the still driven empty winding core (8) is then brought to an auxiliary winding station (58), which is upstream of the main winding station (6), seen in the direction of movement (E) of the material web (54), and at this auxiliary winding station (58) with the over brought the material web (54) running into contact with the winding drum (2), d) the material web (54) is cut between the auxiliary and main winding station (6, 58) and wound up at the auxiliary winding station (58) on the driven winding core (8), while the finished roll (55) is removed from the main winding station (6) becomes, e) the winding core (8) is then moved from the auxiliary winding station (58) to the main winding station (6), in which the next roll (59) is finished. Device for winding a continuously fed material web onto a number of winding cores, characterized by the following features: a) a rotatably mounted winding drum (2) over which the material web (54) is guided, b) one of the winding drum (2) seen in the direction of movement (E) of the material web (54) connected downstream first bearing arrangement (3) for releasable storage of a winding core (8), on which the material web (54) at a main winding point (6) to one Roll (55) of given size is wound up, c) a feed device (7) for feeding in each case an empty winding core (8) from a waiting position (57) to an auxiliary winding station (58), which is connected upstream of the first bearing arrangement (3) in the direction of movement (E) of the material web (54), and in which the empty winding core (8) is brought into contact with the material web (54) running over the winding drum (2), d) a second bearing arrangement (13) for receiving and rotatably supporting the empty winding core (8) supplied by the feed device (7), which can be moved between a take-over position and a transfer position, in which a transfer of the winding core (8) to the first bearing arrangement (3) takes place e) a separating device (56) arranged between the auxiliary winding station (58) and the main winding station (6) for separating the material web (54) when the winding core (8) is empty in the auxiliary winding station (58), f) a switchable and disconnectable drive device (16) for rotatably driving the empty winding core (8), which is coupled to the waiting winding position (57) empty winding core (8) and after transfer of the winding core (8) from the second bearing arrangement (13) is uncoupled from the winding core (8) to the first bearing arrangement (3). Device according to claim 2, characterized in that the drive device (16) has the following features: a) a swivel arm (17) which is rotatably mounted in a bearing element (19) which is fastened to the frame (1) of the winding device such that the axis of rotation (17a) of the swivel arm (17) with the axis of rotation (2a) of the winding drum (2) aligned, b) a coupling arrangement (24) arranged at one end of the swivel arm (17), which can be coupled to a winding core (8) and has a drivable coupling element (34) which detachably engages with a coupling element (35) on the winding core (8) is feasible c) a drive arrangement (21), preferably a piston-cylinder unit, for pivoting the swivel arm (17). Apparatus according to claim 3, characterized in that the coupling arrangement (24) is pivotally mounted on the swivel arm (17) and by means of a drive arrangement (29, 30), preferably at least one piston-cylinder unit, arranged on the swivel arm (17) from a rest position into a Drive position can be pivoted, in which the coupling element (34) engages with the coupling element (35) on the winding core (8). Device according to claim 3 or 4, characterized in that the coupling elements (34, 35) are gear wheels. Device according to one of claims 3-5, characterized in that the coupling arrangement (24) has a clamping arrangement (47, 52, 48), by means of which, when coupling elements (34, 35) are in engagement with one another, the outer ring of a shaft (11 ) of the winding core (8) seated ball or roller bearing (51) can be clamped. Apparatus according to claim 2, characterized in that the first bearing arrangement has two pivotably mounted support arms (3) which serve to receive the winding cores (8). Apparatus according to claim 2 or 7, characterized in that the second bearing arrangement has two rotating arms (13) for receiving empty winding cores (8) which are arranged on both sides of the winding drum (2) so as to be pivotable about the axis of rotation (2a) of the winding drum (2) . Device according to one of claims 2-8, characterized in that the empty winding core (8) is placed at the auxiliary winding point (58) on the material web (54) resting on the winding drum (2). Device according to one of claims 2-8, characterized in that the empty winding core (8) at the auxiliary winding station (58) and during its movement from the auxiliary winding station (58) to the main winding station (6) at a distance from that on the winding drum (2 ) lying material web (54) is held. Drive device (16) designed as a structural unit for a winding core (8) for use in a device according to claim 2, characterized by the following features: a) a swivel arm (17) which is rotatably mounted in a bearing element (19) which is intended to be attached to the frame (1) of the winding device such that the axis of rotation (17a) of the swivel arm (17) with the axis of rotation (2a) the winding drum (2) is aligned, b) a coupling arrangement (24) arranged at one end of the swivel arm (17), which can be coupled to a winding core (8) and has a drivable coupling element (34) which detachably engages with a coupling element (35) on the winding core (8) is feasible c) a drive arrangement (21), preferably a piston-cylinder unit, for pivoting the swivel arm (17). Drive device according to claim 11, characterized in that it is designed as defined in one or more of claims 4-6.

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