EP2729396A2

EP2729396A2 - Winder and a turret unit

Info

Publication number: EP2729396A2
Application number: EP12735435.5A
Authority: EP
Inventors: Richard David PRYLE; Carlos Martinez; Rolf Kammann; Frank Hoffmann
Original assignee: SWISS WINDING INVENTING AG; Windmoeller and Hoelscher KG
Current assignee: SWISS WINDING INVENTING AG; Windmoeller and Hoelscher KG
Priority date: 2011-07-05
Filing date: 2012-07-04
Publication date: 2014-05-14
Anticipated expiration: 2032-07-04
Also published as: US10207886B2; CH705226A2; CN103930360B; WO2013003968A2; EP2729396B1; US20150122934A1; WO2013003968A3; CN103930360A; WO2013003968A9

Abstract

Winder for an endless web of plastics sheet material, having a turret unit which is designed for rotation about its axis and has at least two winding shafts which run parallel to its axis and onto which the winding cores can be loaded, and then can be wound with the sheet material to form a roll and, finally, can be removed again therefrom as a finished roll, wherein both sides of the turret unit have bearing arrangements, in which the corresponding ends of the winding shafts are mounted, and wherein the bearing means for one end of the winding shafts is designed in a releasable manner such that, with the bearing means released, the respective winding shaft can be loaded and unloaded from this end, characterized in that the loosely designed bearing arrangements each have a gripper arrangement with a two-armed scissors unit, the scissors arms of which, in the closed position, embrace the winding shaft and, in the open position, are pivoted away from the same.

Description

winders

The present invention relates to a winder according to the preamble of claim 1. Such winder are mainly used in production lines, in which an extruder produces an endless plastic film which is to be wound continuously and without interruption on hubs.

Both the recipe and the production speed and the width of the plastic film to be wound have a large variety of parameters. In particular, the recipe entails that the film must be wound under well-defined conditions: for example, the tension in the wound film and the contact pressure during winding must be kept within a minimum tolerance range and the winding progress accordingly, otherwise the finished roll unusable. For the frequent mass production, including a production with multiple benefits, where several coils are wound in groups side by side on a common winding shaft, a flying change from ready-made winding to the new hub is inevitable. Often a rotatable turret unit with several winding shafts is used, which brings one of the winding shafts away from its winding position to a removal position by its rotation, whereby at the same time another winding shaft, already with one or a group (multiple uses) of empty hubs equipped, reaches the winding position. During rotation, or immediately after it has been completed, the endless film web is cut, such that the new, leading end of the film web wraps around the empty, just in winding position brought cores, with which the next group of windings can be wound without delay.

In other words, it is such that on one of the winding shafts, which is located in the winding station, a winding produced, ie film is wound and loaded on another shaft, in the loading or unloading station, empty hubs or removed the finished winding become. A rotation of the revolver unit then brings the winding shafts in the respective next station. The time available for loading or unloading is essentially the same as for the creation one or a group of coils required time, which in turn is determined by the feed rate of the film and the desired length of the wound film.

Both the feed rate and the diameter of the rolls have become larger in recent times. Feed speeds of 500 to 600 m / min are the norm, 800 m / min attainable and even higher feed speeds are to be expected. Winding diameters up to 400 mm are produced today, larger diameters are to be expected. The time for the winding of large diameters is one minute, of course, a shortening of this time is desirable.

This means two things:

First, the time available for the rotation of the turret assembly, which ultimately is unproductive, is extremely short and should not exceed one second. The weight of the finished rolls is considerable, for example, a multiple use with four coils with a diameter of 400 mm and a width of 500 mm about 224 kg. The diameter of the revolver unit, in which such reels must find space, with these ever larger and exceeds 1 m. The turret unit becomes a large, solid construction, which requires a very high drive power with correspondingly massive drive mechanisms for the rotation to be carried out in seconds. One reason for this is that for the required winding quality an accurate and stable storage of the winding shafts rotatably mounted in turn for winding the coil in the turret unit is mandatory, which in turn requires a stable, therefore massive and complex frame of the turret unit. Secondly, it is the case that a winding shaft to be loaded or unloaded must be open on one side so that winding cores can be pushed onto this side or finished windings can be pulled off. The storage of the winding shafts must therefore be unilaterally solvable, as shown for example in WO 2009/050556 with a suitable solution for large winding. In this solution, however, inevitably all the winding shafts, ie also those located in the winding station, released on one side, resulting in a significant stress on the storage on the other side leads, which is to be countered with the appropriate design effort, which in turn makes the revolver unit even more massive.

For winder with small winding diameters, a solution has become known in which each wakkelwelle is associated with a wegklappbarer tailstock, which engages axially via a retractable mandrel in the end face of the winding shaft and this so removably stored.

If such a solution would be scaled up, a turret unit with elaborate and heavy construction resulted, which is undesirable in view of, among other things, the short time available for its rotation. For example, if the retractable mandrel is conical, it can engage in the backlash of the winding shaft without play during operation. However, the mandrel and the winding shaft are not exactly exactly aligned, which is the normal case in operation, due to the conicity high side forces that act on the tailstock, which leads to the aforementioned massive construction, at least for larger winding diameters. If a cylindrical mandrel is used to avoid the side forces, even the slightest play leads to wear and out-of-round running of the winding shaft, which in turn makes perfect winding difficult if not impossible.

Accordingly, it is the object of the present invention to provide an improved turret unit.

In order to achieve this object, the turret unit has the characterizing features of claim 1. By providing a gripper assembly with a two-armed scissor unit, a compact turret unit with correspondingly low inertia during rotation can be realized even for large winding diameters, which results in a comparatively simple drive high spin allowed. The invention will be described in more detail below with reference to the figures: It shows:

1 is a view from the side of an inventive eight-fold winder FIG. 2 is a three-dimensional view of the winder of FIG. 1 from the front

3 shows a view of a preferred embodiment of the turret unit according to the invention

Fig. 4a is a view of the head end of the turret unit of Fig. 3, wherein the storage of two winding shafts is released

Fig. 4b is a view of the head end of the turret unit of Fig. 3, wherein the storage of two winding shafts is released, while the third winding shaft is mounted

5 is a view of the gripper assembly of the turret assembly of FIG. 3;

6a shows a view of a further preferred embodiment of a revolving unit according to the invention in which the winding shafts are mounted over a bearing length,

6b is an enlarged view of a gripper unit of the embodiment of Fig. 6a,

7 shows a view of the head end of a further embodiment of the turret unit according to the invention,

8 is a view of the head end of yet another embodiment of the invention Revolvereinheit, and

9a to 9c are views of the head end of an additional embodiment of the turret unit according to the invention. 1 shows a winder 1 according to the invention in a side view, which represents the path of the endless web of a film 2 through the winder 1. A cutting unit 4, the endless film 2 is separated lengthwise, so that two separate film webs 5 and 5 'are formed, each of the film webs is carried out 5,5' in an associated turret unit 6,6 '. The turret assemblies 6,6 'are basically the same structure and each have three winding shafts in the illustrated embodiment, namely a first winding shaft 10,10', a second winding shaft 11,11 'and a third winding shaft 12,12'. Behind the cutting unit 4 is a winding unit 3 for broke.

The winding shafts 10, 10 'to 12, 12' are located in different work stations, namely a loading station 13, 13 ', a winding station 14, 14' and a removal station 15, 15 '.

The Revolvereinheiten 6,6 'are formed by a omitted to relieve the figure drive according to the arrows in the counterclockwise direction about their longitudinal axes 16,16' gradually rotatable, such that each of the winding shafts 10,10 'to 12,12' in another Rotation step is brought from their previous workstation to their next.

Each of the winding shafts so happens in the cycle, the charging station 13,13 ', where it is loaded with fresh hubs 17, passes through a further rotation step of the turret units 6,6' in the winding station 14,14 ', where the hubs 17 with the film. 2 be wound to the finished winding 18 and from there to the removal station 15,15 ', where the winding 18 are removed from the turret unit 6,6'.

A contact roller 19, 19 'known to a person skilled in the art provides in the winding station 14, 14' for the contact pressure corresponding to the respective formulation of the film.

In summary, according to the invention, a winder for an endless web of a plastic film, with a turret unit which is rotatable about its axis and has at least two parallel to its axis winding shafts, loaded on the hubs, then wound with the film into a winding finally as finished winding can be removed from this again, wherein the winding shafts are fixedly mounted in the turret unit at its one end in its position parallel to the axis thereof, and wherein the storage on the other side for each winding shaft indivi- duel is releasably formed, such that the respective winding shaft can be loaded and unloaded at storage dissolved from this end.

In this case, the detachable mounting for each winding shaft is preferably formed by a gripper arrangement assigned to it, which is fixedly mounted on the revolving unit and rotates with it, operatively stores the winding shaft in its closed position and can be moved away from it in the open position.

Overlying transport means, which is designed here as below, driven conveyor belt 20,20 ', the winding 18 are guided away from the turret unit 6,6'. The charging station 13,13 '(or the loading position) is thus in 14 o'clock position, the winding station 14,14' (or the winding position) in 10 o'clock position and the removal station 15,15 '(or the removal position) in 6 o'clock position. In the charging station 13,13 'which there is winding shaft 10,10' to 12,12 '- in the figure it is the winding shaft 10,10' - loaded with hubs 17. The winding shaft 10 is already loaded, the winding shaft 10 'not yet.

This happens while in the winding station 14, 14 'the winding shaft 11, 11' is wound with film 2. The winding 18 of the winding shaft 11 is already advanced, the winding 18 of the winding shaft 11 'carries only the first layers of the film. 2

As soon as the rolls 18 are in the 6 o'clock position by corresponding rotation of the turret unit 6, 6 ', the conveying surface 21, 21' of the conveyor belt 20, 20 'is raised until it carries the rolls 18 and carries them into the winding shaft 12, 12'. can lead away parallel direction. The loss of time between the positioning of the winding 18 in the removal station 15,15 'and the beginning of Abtransports by the conveyor belt 20,20' is thus in contrast to the solutions become known in the art minimal:

In the prior art, the winding 18 are removed in 10 o'clock or 14 o'clock position, with the result that the conveyor belt from a laterally parked position first under the winding gefah must be ren, which costs additional time. The lateral parking position is unavoidable, otherwise the conveyor belt would be in the way of rotation of the turret unit. According to the invention, the conveyor belt 20 is already in position, since it does not stand in the way in the 6 o'clock position of the rotation of the turret unit. The loss of time is therefore limited to the short time required for the conveyor to start up.

According to the invention, this results in a method for operating the winder, in which the winding is removed in the region of the 6 o'clock position, preferably at the completion of a rotation step of the turret unit, with the winding to be taken out into the region of the 6 o'clock position. have been brought from below, a conveyor is introduced to the winding, such that they rest with at least a portion of their weight on this, and then discharged from this conveyor.

According to the invention, a winder for an endless web of a plastic film, with a revolving unit which is rotatable about its axis and has at least two winding shafts running parallel to its axis, is then loaded onto the winding cores, then finally wound with the film into a winding finished winding can be removed from this again, wherein on both sides of the turret bearing assemblies are arranged, in which the winding shafts are mounted at their respective ends in this, and wherein the storage for one end of the Wiko waves is releasably formed, such that the respective winding shaft can be loaded and unloaded from this end when the bearing is released, the winder being designed such that in each case a winding shaft can be brought into the region of the 6 o'clock position and the windings can be removed in this region. Figure 2 shows a view of the winder 1 of Figure 1. The film 2 is once separated into the film webs 5,5 ', which in turn are each separated into four longitudinal foil webs 5 * and 5 *'. Each turret unit 6, 6 'thus operates with four-fold, that is, four wraps 18 are wound at the same time.

At the foot end 24,24 'of the revolver units 6,6' there is a drive unit 25,25 'for one hand, the gradual rotation of the revolver unit itself and on the other hand for in the winding station 14,14' (Figure 1) necessary rotation of the winding shafts 10,10 'to 12.12'. The head end 26, 26 'of the Vol units 6,6 'is free to allow the loading of the winding shafts 10,10' with winding cores 17 and the removal of coils 18 of the winding shafts 12,12 '.

The loading with winding cores 17 and the removal of the winding 18 takes place in the direction of the longitudinal axis of the respective winding shaft 10, 10 'to 12, 12'.

Also shown are a magazine 27 for hubs 17 with a buffer rod 28, from which the provided group of hubs 17 in the direction of the arrow 29,29 'on a winding shaft 10,10' to 12,12 'can be pushed as soon as this Loading position has reached. The windings 18 output by the conveyor belts 20, 20 'reach an exit area 9 in the direction of the arrow 29 ", 29"'.

As mentioned above, in the present layout, the loading of a winding shaft 10,10 'to 12,12' with winding cores requires that the winding shaft at the head end 26,26 'of the turret unit freely accessible, i. is not stored there. Likewise for the removal of coils 18. This means that then the respective winding shaft 10,10 'to 12,12' only one side in the foot 24,24 'is mounted, so vorkragt from this, which in turn requires a complex and massive storage on Foot end 24,24 'necessary. This is not very critical in the loading station 13, 13 ', since the winding cores 17 are comparatively light, but critical in the removal station 15, 15' with the coils 18, which are heavy with larger diameters.

In the winding station 14,14 ', however, the respective winding shaft 10,10' to 12,12 'must be stored on both sides, otherwise due to the winding tension and the pressure roller 19, the winding shaft could not run smoothly and would also bend out, which is a flawless Winding on most recipes made it impossible.

Accordingly, it is necessary to store the winding shafts 10,10 'to 12,12' at least in the winding station 14,14 'at both ends, but not in the other stations, so the storage for one end of the winding shafts 10,10' to 12,12 'detachable, while the storage at the always tightly clamped end to make it accordingly stiff. Now, if the storage at one end of the winding shaft 10,10 'to 12,12' in the removal station 15,15 'inventively solved only when the conveyor belt 20 carries the winding 18 after startup, reduce the requirements for storage in the other , fixed end of the winding shaft at the foot end 24,24 'of the turret unit 6,6', although not completely, but still considerable borrowed. The removal of the winding 18 in the 6 o'clock position correspondingly not only saves time in the removal area, but at the same time also reduces the requirements for the storage of the winding shafts.

FIG. 3 schematically shows a view of a preferred embodiment of a turret unit 6 according to the invention (for simplicity, the reference character 6 'as well as all the characters belonging to the turret unit 6' will be omitted below).

At the foot end 24 there is a disc-shaped base plate 30, in which the winding shafts 10 to 12 are arranged. Covered by the base plate 30, i. on the rear side, the drive unit 25 (FIG. 2) with the drive components for the rotation of the winding shafts 10 to 12 and the rotation of the revolving unit 6 itself is arranged. To relieve the figure, all surrounding elements of the turret unit 6 (see Figure 2) and their storage are omitted.

On the head side 26 is a support plate 31, fixedly mounted on a central tube 32 which lies in the longitudinal axis 16 of the turret unit 6 and is fixed to the base plate 30, so that the support plate 31 rotates with the base plate 30 with. Recesses 33 to 35 are provided at the location of the winding shafts 10 to 12 and have dimensions that allow a free passage of winding cores 17 to be loaded on the winding shaft assigned to it or finished wraps 18 to be taken from it.

On the support plate 31, three bearing assemblies for the winding shafts 10 to 12 are arranged, each with a gripper assembly 36 to 38, which in turn each having a two arms, i. two-armed scissor unit 39 to 41 have.

Each scissor unit 39 to 41 is provided with two scissor arms 42, 43 which, in the closed position, each engage over a recess 44, 45 on the winding shaft assigned to it, and these are thus operable. store well. The scissor arms 42,43 are mounted at articulation points 46,47 in the support plate 31 and here preferably via pneumatic cylinder 48,49 pivotally, whereby the scissors units 39 to 41 can be opened and closed. In the illustrated arrangement, the support plate 31 extends from the axis 16 of the turret unit 6 radially outwardly between adjacent winding shafts 10 to 12, wherein the scissor arms 44,45 of the gripper assembly 36 to 38 pivotally in a lying between the winding shafts 10 to 12 area the support plate 31 are hinged. In the embodiment shown, three winding shafts 10 to 12 and a contour of a three-armed star having support plate 31 are provided, wherein three of the carrier plate 31 as scissor units 39 to 41 formed gripper assemblies 36 to 38 are arranged, whose pivotally mounted on the support plate 31 Scissor arms 42, 43 are also opened and closed via drive units, which are also arranged on the carrier plate 31, preferably pneumatic cylinders 48, 49.

FIG. 4a shows the turret unit 6 in a phase in which the bearing arrangements of the winding shafts 10 and 12 are opened (loading winding cores 17 onto the winding shaft 10 / removal of windings 18 from the winding shaft 12) while that of the winding shaft 11 is closed this is in the winding station 14 (Figure 1).

The scissor arms 42,43 are pivoted in the direction of the arrows. It should be noted that the bearing assemblies can in principle be operated independently of one another and also during the rotation of the turret unit 6.

For example, it is possible that in contrast to the movement phase of the bearing arrangements shown in the figure, that in the 6 o'clock position (removal station 15, FIG. 1) remains closed until the conveyor belt 20 carries the wraps 18 (FIG. 1), while that of the charging station still during the rotation of the revolving unit 6 or immediately thereafter opens. Figure 4b shows the turret unit 6 in a phase in which new hubs 17 loaded and the winding 18 are removed: The bearing assemblies of the winding shafts 10 and 12 are fully open, the scissor arms 42,43 are in the open position, that is pivoted away from the winding shafts and are recessed in the support plate 31, so that the passage for the winding 18 is limited only by the dimensions of the recesses 33 to 35.

By the articulation of the scissor arms 42,43 in an area between adjacent winding shafts 10 to 12 results in its open position, a position which allows only a small distance of the (free in the open position) recess 33 to 35 from the central tube 32, so that the winding shafts 10 to 12 can be moved close to this and thus the turret unit 6 can be made compact as a whole. In addition, this articulation of the scissor arms 42,43 allows the recess 44 in the arm 42 to be designed so that the stored winding shaft 10 to 12 in the winding station 14 (Figure 1) is supported by the recess 44, i. the stress acting there is not suitable to open the scissor unit 39 to 41 u.

Figure 5 shows a view of the recess 35 of the support plate 31 with the existing of the scissor unit 41 gripper assembly 38 (of course, the other two recesses 33,34 are formed with the same organs arranged same). Here it can be seen that the support plate 31 is formed as a double plate, in the intermediate space 50, the scissor arms 42,43 are retractable. It can also be seen that also the scissor arm 42 is double-walled with an outer wall (110) and an inner wall (111), and wherein another scissor arm (43, 42) is formed between the outer wall (110) and the inner wall (111 ) is arranged. Through the outer wall (110) and the inner wall (111), a gap 51 is formed, which receives the scissor arm 43, and is guided thereby. In addition, a cam 54 arranged on the scissor arm 43 and running in a groove 53 of the scissor arm 42 improves this guidance and thus increases the safety and the coordinated movement of the scissor arms 42, 43.

FIG. 6a shows a further preferred embodiment of a turret unit 120 according to the invention. Two winding shafts 10 and 12 are visible, while the third winding shaft 11 (FIG. 5) is concealed. Also visible are gripper assemblies 121 to 123 with each double-walled scissor arms 124, consisting of an outer wall 125 (ie, on the outside of the turret unit 120) and an inner wall 126 (located inside the turret unit 120). Between the outer wall 125 and the inner wall 126 is an associated scissor arm 127. The scissor arms 124, 127 of each gripper assembly 121 to 123 are in the closed position, comprise the respective winding shaft 10 to 12 and form for this a storage unit 130, which the respective Wickel- shaft 10 to 12 over a bearing length I superimposed, as shown in detail in Figure 6b.

FIG. 6b shows a detailed view of the gripper arrangement 123, which is shown shortly before its closing position and thus still leaves the view of the end of the winding shaft 12 free. The following description refers to the elements of the gripper assembly 123, but applies mutatis mutandis to the other two gripper assemblies 121 and 122 (including the winding shafts 10 and 11) of the revolver unit 120 (Figure 6a):

It can be seen the outer wall 125 of the scissor arm 124, while the inner wall 126 (Figure 6a) is hidden here. Also visible is the scissors arm 127 located between the outer wall 125 and the (hidden) inner wall. The thickness of the scissors arm 127 is determined by the person skilled in the art according to the following conditions.

The winding shaft 12 has four bearings 130 to 133, i. a first bearing 130, a second bearing 131, a third bearing 132 and a fourth bearing 133, which are preferably formed as roller bearings, but can be formed by the skilled person with regard to the specific winder in any manner. In the closed position of the scissor arms 124, 127, the first bearing 130 interacts with the inner wall 125 of the scissor arm 124 (FIG. 6 a), the second bearing 131 and the third bearing 132 with the scissor arm 127 and the fourth bearing 133 with the outer wall 125 of the scissor arm 124 , In other words, it is such that the first bearing 130 and the second bearing 131 together form a first bearing area 135 and the third bearing 132 with the fourth bearing 133 together form a second bearing area 136 for the winding shaft 12, whose distance corresponds to the bearing length I.

A bearing with a bearing length I causes improved storage by fixed clamping of the winding shaft 12, since the clamping extends over a longitudinal section of the winding shaft 12, which has an advantageous effect on the bending line under the stress in the winding station. For example, with regard to the Resonanzfreqzenz (vibrations during winding) or in terms of equal pressure across the width of all the winding through the contact roller 19,19 '(Figure 1). Especially for large diameters of the winding at high winding speed, the parameters resonance frequency and uniform pressure are crucial for proper winding.

Accordingly, the person skilled in the art can determine the bearing length I according to the two parameters mentioned above and also according to other relevant parameters and, for example, in the arrangement shown in the figures, thus also the width of the scissor arm 127, which determines the distance of the outer wall 125 and the inner wall 124 (FIG. Figure 6a) determined. In the idea of the invention, the scissor arm arranged between the outer wall 125 and the inner wall 124 is likewise designed to be double-walled in order to avoid an excessively massive design of this scissor arm 124 (FIG. 6 a).

Basically, the scissor arms can be formed with any width, so that for each specific application, the stock length I can be optimally realized. This also means that the scissor arms in the storage area are designed by the skilled person as necessary, i. E. such that they store the winding shaft over the bearing length in one or more points and thus clamp. The illustrated in Figures 1 to 5 preferred embodiment of the present invention has three winding shafts, with the advantage that loaded on a respective winding shaft only hubs or winding are removed. According to the invention, however, also turret assemblies with only two winding shafts, in which case during the manufacture of the winding on the one winding shaft on the other winding shaft on the one hand removed the winding and on the other hand, the new cores have to be loaded. Furthermore, configurations with more than three winding shafts are also conceivable.

Furthermore, in the embodiments shown in FIGS. 2 to 5, the rolls are taken out on the same side and the winding cores are loaded. If the winder according to FIG. 2 has the layout shown there, this is advantageous because the drive unit can be arranged on the other side. However, such a layout is not mandatory. Allow embodiments according to the invention Also to load hemming cores from one side and spend the wraps on the other side. Then the inventive carrier plates are provided on both sides, which allows complete flexibility in the layout of the winder. In other words: the releasably mounted ends of the winding shafts can also lie on different sides of the turret unit.

Finally, according to the preferred embodiment illustrated in FIGS. 2 to 5, the winding shafts are fixed at the foot end 24, 24 '(FIG. 2). According to yet another embodiment, also according to the invention, the winding shafts can likewise be detachably arranged at the foot end, for example by a carrier plate equipped with gripper arrangements, as already used at the head end of the revolving unit. As a result, winding shafts can be removed in the radial direction from the turret unit and reinserted into it, which allows to load winding shafts outside the turret unit with winding cores or to remove the reels outside the turret unit from the winding shaft. FIG. 6 shows a view of the head end of a further embodiment of the turret unit 55 according to the invention. The winding shafts 10 and 12 and the center tube 32 are visible, the winding shaft 11 being covered by the winding shaft 10.

Instead of a carrier plate 31 (FIGS. 2 to 4), a double flange ring 52 is provided on which pivotable scissor arms 57,58 are pivoted via pivoting axes 56, which extend substantially radially away from the region of the axis 16 of the revolving unit and into the closed position via recesses 59,60 the respective winding shaft 10 to 12 store this but release in the open position. A here three-armed guide plate 60 has in each of its arms 61 in this radially extending guide rail 62 for an actuator 63, the scissor arms 57,58 pivots about actuating arms 64,65. The displacement of the actuating element 63 via a provided on the back of the arms 61 of the guide plate 60 conventional drive such as a threaded spindle, as is familiar to those skilled in the art. FIG. 7 shows a view of the head end of yet another embodiment of the revolving unit 70 according to the invention with the winding shafts 10 to 12, wherein an anchor plate 71 is fixed to the central tube 32, with support arms 72, 73, which between them form a passage for one to be taken Form winding 18 and support pneumatic cylinder 74,75, which each act on a three-armed bearing star 76,77. By operating the cylinder 74,75 rotate the bearing stars 76,77 with their arms 78,79 towards each other or away from each other, so that a lying between the arms winding shaft 10 to 12 stored or released in the recesses 80,81 becomes.

8a to 8c show three views from different viewing directions on the head end of an additional embodiment of the turret unit 90 according to the invention.

8a shows a fixedly arranged on the end face of the central tube 32, with this with rotating support plate 91, with radially projecting, short extensions 92 extending into the space between the winding shafts 10 to 12 (ie space for the removal of a coil 18 free leave) and serve in the outer area as a bearing for a rotation axis 93, via which in turn a respective locking arm 94 is rotatably mounted about its center.

In the illustrated configuration, the winding shafts 10 to 12 form the corners of an equilateral triangle with the axes of rotation 93 in the middle of the sides of the triangle. The length of the locking arms 94 is chosen such that they comprise the winding shafts with their bearing grooves 95 like a scissor at the end and can lock in place, thus storing them operatively in the closed position.

The storage is achieved by the locking arms are rotated according to the arrow in the clockwise direction, so far until the corresponding in its contour the central tube 32 recess 96 abuts against this (and the passage for winding 18 is open), as indicated by the dotted Arrow is indicated.

FIG. 8b shows the drive of the locking arms via gears 100, which in turn are driven by a central gear 101. This arrangement has the advantage that the gear 101 are driven by a shaft extending in the central tube 32 and thus the corresponding motor in the Drive unit 25 (Figure 2) can be accommodated, which supports the compact design of the revolver unit 90 shown.

FIG. 8c shows the locking arms 94 in the open position and the winding shafts 10, 11 freely projecting therewith with the open passage for the winding 18 or winding cores 17.

Further embodiments with bearing arrangements according to FIGS. 6 to 8 can be formed, as shown above for the further embodiments for a turret unit according to FIGS. 2 to 5.

Claims

claims

Winder for an endless web of a plastic film (2), with a turret unit (6, 6 ', 55, 90) which is designed to be rotatable about its axis (16) and at least two winding shafts (10 to 12) running parallel to its axis (16) , 10 'to 12'), loaded onto the winding cores (17), then wound with the film (2) into a winding (18) finally as a finished winding (18) can be removed from this, with on both sides of Turret assembly (6,6 ', 55,90) bearing arrangements are arranged, in which the winding shafts (10 to 12, 10' to 12 ') are mounted at their respective ends in this, and wherein the storage for one end of the winding shafts (10 to 12, 10 'to 12') is detachably formed, such that the respective winding shaft (10 to 12, 10 'to 12') can be loaded and unloaded from this end in dissolved storage, characterized in that the releasably formed Bearing arrangements per a gripper assembly (36 to 38) with a two-armed scissors have unit (39 to 41), the scissor arms (42,43) comprise the winding shaft (10 to 12, 10 'to 12') in the closed position and are pivoted away in the open position thereof.

Winder according to claim 1, wherein the bearing arrangements for the end to be released of a respective winding shaft (10 to 12, 10 'to 12') are independently detachable.

Winder according to Claim 1 or 2, wherein the turret unit (6, 6 ') has a carrier plate (31) for the gripper arrangement (36 to 38), which is arranged perpendicular to its axis (16) and rotates with the turret unit, with dimensions which are free Allow passage of winding cores (17) to be loaded on winding shaft (10 to 12, 10 'to 12') associated therewith or finished wraps (18) to be taken from same.

Winder according to claim 3, wherein the support plate (31) extends outwardly from the axis (16) of the turret unit (6, 6 ') radially between adjacent winding shafts (10 to 12, 10' to 12 ') and the scissor arms (42 , 43) of the gripper arrangement (36 to 38) are pivotably articulated in a region lying between adjacent winding shafts (10 to 12, 10 'to 12') on the carrier plate (31).

5. Winder according to claim 4, wherein three winding shafts (10 to 12, 10 'to 12') and a contour of a three-star star having support plate (31) are provided, and wherein on the support plate (31) as three scissor units (39 bis 41) formed gripper assemblies (36 to 38) are arranged, the pivotally mounted on the support plate (31) scissor arms (42,43) also on the support plate (31) arranged drive units, preferably pneumatic cylinder (48,49), opened and closed become.

6. Winder according to claim 2, wherein the scissor arms (42,43) in the region of the axis (16) of the turret unit (55) are pivotably articulated thereto and extend substantially radially away from the latter.

7. Winder according to claim 1, wherein the releasably mounted ends of the winding shafts (10 to 12, 10 'to 12') on different sides of the turret unit (6,6 ', 55,90) lie.

8. Winder according to claim 1, wherein the turret unit is rotatable such that the winding shafts (10 to 12, 10 'to 12') for loading with winding cores (17), for the winding of a roll (18) and for the removal a finished coil (18) lie in a respective assigned position, wherein the removal position is in the range of 6 o'clock position.

9. Winder according to claim 8, wherein below the turret unit (6,6 ', 55,90) below the removal position conveying means for the removal of the winding (18) of the winding shaft (10 to 12, 10' to 12 ') are provided.

10. Winder according to claim 1, wherein the scissor arms (42,43) in the closed position form a bearing unit (130) which supports the associated winding shaft (10 to 12, 10 'to 12') over a bearing length (I).

11. Winder according to claim 10, wherein the bearing unit (130) supports the associated winding shaft (10 to 12, 10 'to 12') in two spaced-apart areas (135,136), and whose distance forms the bearing length (I).

The winder of claim 1, wherein one of the scissor arms (42, 124) of the gripper assemblies (36 to 38; 121 to 123) is double-walled with an outer wall (110, 125) and an inner wall (111, 126) and another scissor arm (43,127) between the outer wall (110,125) and the inner wall (11,126) is arranged.

13. Winder according to claims 11 and 12, wherein in the closed position of the scissor arms (124,127), the inner wall (126) cooperates operatively with the other scissor arm (127) and forms a first storage area (135) and also the outer wall (125) the other scissor arm (126) cooperates operatively and forms a second storage area (135).

14. Winder according to one of the preceding claims, wherein this has an upstream extruder for producing the endless film web and a transport path for the film (2) between the extruder and the turret unit (6,6 ', 55,90).

15. Revolver unit for a winder according to one of the preceding claims, which has at least two parallel to its axis (16) winding shafts (10 to 12, 10 'to 12'), loaded on the winding cores (17), then with the film ( 2) wound into a roll (18) finally as a finished winding (18) can be removed from this again, wherein on both sides of the turret unit (6,6 ', 55,90) bearing assemblies are arranged, in which the winding shafts (10 bis 12, 10 'to 12') are rotatably mounted at their respective ends in this, and wherein the storage for one end of the winding shafts (10 to 12, 10 'to 12') is detachably formed, such that the respective winding shaft (10 to 12, 10 'to 12') can be loaded and unloaded from this end in dissolved storage, characterized in that the releasably designed bearing arrangements each have a gripper arrangement (36 to 38) with a two-armed scissors unit (39 to 41) whose Scissor arms (42.4 3) comprise the winding shaft (10 to 12, 10 'to 12') in the closed position and are pivoted away in the open position thereof.

A turret assembly according to claim 15, wherein the support plate (31) extends radially outwardly from the axis (16) of the turret unit radially between adjacent winding shafts (10 to 12, 10 'to 12') and the scissor arms (42, 43) of Figs Gripper arrangement (36 to 38) pivotable in a nem between the winding shafts (10 to 12, 10 'to 12') lying area hinged to the support plate (31).

17. Turret unit according to claim 15, wherein the scissor arms (42, 43) in the closed position form a bearing unit (130) which supports the associated winding shaft (10 to 12, 10 'to 12') over a bearing length (I).

18. A turret assembly according to claim 17, wherein the bearing unit (I) supports the associated winding shaft at two spaced-apart areas (135, 136) and whose spacing forms the bearing length (I).

19. A method for operating a winder according to one of claims 1 to 14 or a turret unit according to claim 15 or 18, characterized in that the removal of the winding (18) takes place in the region of the 6 o'clock position.

20. A method for operating a winder according to claim 19, wherein at the completion of a rotation step of the turret unit, have been brought to be removed with the winding (18) in the range of 6 o'clock position, from below a conveyor to the winding (18) such that they rest thereon with at least a portion of their weight before being removed from this conveyor.

A winder for an endless web of a plastic film (2) comprising a turret unit (6, 6 ', 55, 90) which is rotatable about its axis (16) and at least two parallel to its axis (16) Having winding shafts (10 to 12, 10 'to 12'), loaded onto the winding cores (17), then wound with the film (2) into a winding (18) finally as a finished winding (18) can be removed from this again, wherein on both sides of the turret bearing assemblies are arranged, in which the winding shafts (10 to 12, 10 'to 12') are mounted at their respective ends in this, and wherein the storage for one end of the winding shafts (10 to 12, 10 ' to 12 ') is designed to be detachable, such that the respective winding shaft (10 to 12, 10' to 12 ') can be loaded and unloaded from this end when the bearing is dissolved, characterized in that the winder is formed such that in each case a winding shaft (10 to 12, 10 'to 12') placed in the range of 6 o'clock position and the winding (18) can be removed in this area.

22. Winder according to claim 21, wherein that under the turret unit a conveyor is arranged, which allows in the rest position, the rotation of the finished coils (18) equipped turret unit, and carries at least a portion of the weight of the winding to be removed (18) in conveying position ,