EP2636622A2 - Turret winder of a cast film system - Google Patents

Abstract

The winder (1) has three winding devices (3-5) arranged in a frame (2) for winding a film. The first and second winding devices are arranged at a height level (H1) and the third winding device is arranged on another height level (H2) that differs from the former height level smaller than the latter height level. The first and second winding devices border at two lateral end regions (6, 7) of the frame, and the third winding device is centrally arranged between both lateral end regions of the frame. The winding devices wind the film up to winding diameter of about 450 mm.

Description

The invention relates to a turret winder of a cast film plant, comprising a frame in which winding devices for winding film are arranged, wherein at least three winding devices are arranged in the frame, wherein two winding devices at a first height level and a third winding device at a second, from the first height level is arranged at different levels of height, each winding device has at least two winding shafts for winding foil and wherein the at least two winding shafts are mounted in a turning cross.

Turret winder of this kind are for example from the DE 32 39 661 A1 known. Here several winding devices are arranged at different height levels. A similar solution shows the FR 1 120 135 A , The winding of tape-shaped good to reels also deal with the US Pat. No. 6,283,401 B1 that US 5,909,856 and the EP 2 067 724 A1 ,

Turret winder of a cast film plant, comprising a frame in which winding devices for the winding of film are arranged.

A cast film plant for producing films essentially has an extruder unit in which plastic material is plasticized. The extruder unit is followed by the casting station in which the film is formed from the plastic melt. A device for measuring the thickness of the cast film is usually arranged behind the casting station. Behind a so-called corona unit then follows said turret winder, in which the film is wound and prepared for further handling. Here, in particular, a turning of the film is intended to configure and provide various film layers.

The abovementioned installation can be designed, for example, as a so-called stretch film installation, in which case, for example, the production of so-called pallet stretch film can take place.

Such systems can be designed for a certain film width (eg 4 x 500 mm net film width as a so-called 4-up version or 8 x 500 mm net film width as a so-called 8-up version).

It should be noted in the present Wendewicklern that they reach a certain critical deflection due to the size to be processed (maximum 450 mm diameter in stretch film winder), in which the shaft is at risk of breakage and the rotation of the winding shaft is unstable and accordingly there is an unsatisfactory winding result , Therefore, winders (winders) are generally built only up to a certain film width. It has also become known to arrange two juxtaposed winder in the turret winder for the case of a wider solution.

The disadvantage is that any division of the film on several winder can lead to space problems, in particular as regards the placement of the winding shaft with (winding) sleeves and the removal of the finished wound bobbins.

The invention is therefore based on the object , a turret winder of the type mentioned in such a way that even larger systems can be performed easily, on the one hand it is important that a proper winding can be sufficiently spaced from critical winder speeds and where on the other essential is that the film produced can be handled advantageously. Another important aspect is that the space required for the turret winder should be as low as possible, so that a correspondingly large system without significant additional costs - in terms of space requirements - is feasible. It is the removal of finished bobbins from the winding shafts and their placement with sleeves essential to; In this regard, a space-saving and easy to automate solution to be proposed, which is thus a space-saving design and efficient operation should be possible.

The solution of this problem by the invention is characterized in that the winding shafts are arranged pivotably about a vertically arranged axis in the turning cross, wherein the pivot point of the winding shaft is disposed in an axial end portion of the winding shaft, wherein the pivot points of two winding shafts, which are on the same Height level are located in adjacent axial end portions of the winding shaft.

The maximum pivot angle is preferably 20 °, more preferably a maximum of 15 °.

At least one winding shaft of a winding device can be arranged pivotably on the first height level and at least one winding shaft of a winding device on the second height level in the same pivoting and parallel to each other about the vertically arranged axis. It can thus be achieved that the wound reels (bobbins) can be pulled off parallel from two winding shafts at the same time. As a result, a very space-saving arrangement is possible, which uses an overlapping construction.

The turret winder preferably further has at least one taken-out trolley for wound film, wherein the pick-up trolley is translationally movable on a rail system extending at least in sections, wherein the direction of the rail system is aligned with the frame at the maximum pivoting angle.

The first height level is preferably lower than the second height level.

A preferred embodiment provides that two winding devices located at the first height level adjoin two lateral end regions of the frame and the adjacent axial end regions of the winding shafts are located in the machine center. Preferably, a winding device located at the second height level is arranged centrally between the two lateral end regions of the frame. The axial extent of the located on the second level height winding device can continue with the axial extensions of the two located at the first level height winders overlap; In this case, the overlap between 5% and 50% of the axial extent of one of the winding devices amount. Each winding device preferably has the same axial length.

The winding devices located at the first height level and a winding device located at the second height level may be arranged offset in the direction radially to the axis of rotation of the winding devices and in the direction of the horizontal.

Each of the winding devices can be designed to wind up to a winding diameter of 600 mm foils.

Each winding device may be associated with a measuring roller for determining the tension in the film to be wound.

Furthermore, each winding device can be equipped with a control system for reducing or preventing vibrations in order to be able to change or eliminate the critical speed of the winding device.

The frame preferably has two lateral cheeks which are connected to each other via bars.

All winding devices may be associated with a common cutting device, which is designed for longitudinal separation of the film web.

The turret winder is according to a preferred embodiment of the invention part of a stretch film plant.

The proposed solution makes it possible to realize even larger systems (executed, for example, as so-called. 12-up systems), the winding of the film in the turret winder is easily possible.

The proposed turret winder allows a sufficient winding speed of the film, with a sufficient distance from the critical shaft speeds or the rotational speeds can be maintained, so that a clean winding is ensured.

Furthermore, the space required for the turret winder is optimized, since the said arrangement of preferably three winder (winder) optimally takes place in the frame, so that given the footprint of the turret winder a maximum performance of the winder is given. The room costs are kept so low. This applies in particular taking into account the removal of finished wound bobbins and the loading of the winding shafts with sleeves for the winding of film. The said pivoting of the winding shafts about a vertical axis allows in the said arrangement a very compact design with a small footprint.

Fig. 1

in perspektivischer Darstellung einen Wendewickler einer Stretchfolienanlage, wobei auf den Wickelwellen fertige Bobinen angeordnet sind,

Fig. 2

in perspektivischer Ansicht den Wendewickler (ohne seitlich Verkleidung), wobei einige Wickelwellen in eine Entnahmeposition verschwenkt sind,

Fig. 3

die Draufsicht auf den Wendewickler nach Fig. 2,

Fig. 4

in perspektivischer Ansicht den Wendewickler samt einer Anordnung von Entnahmewagen auf Schienensystemen zu einem ersten Verfahrenszeitpunkt, zu dem noch keine zu entnehmenden Bobinen vorhanden sind,

Fig. 5

in perspektivischer Ansicht den Wendewickler samt Entnahmewagen zu einem zweiten Verfahrenszeitpunkt, zu dem die Wickelwellen in eine Entnahmeposition verschwenkt und die Entnahmewagen in eine Entnahmeposition verfahren sind,

Fig. 6

in perspektivischer Ansicht den Wendewickler samt Entnahmewagen zu einem dritten Verfahrenszeitpunkt, zu dem die Bobinen von den Entnahmewagen entnommen werden,

Fig. 7

in perspektivischer Ansicht den Wendewickler samt Entnahmewagen zu einem vierten Verfahrenszeitpunkt, zu dem die Bobinen von den Entnahmewagen entnommen sind und Hülsen auf die Wickelwellen aufgeschoben werden, und

Fig. 8

in perspektivischer Ansicht den Wendewickler samt Entnahmewagen zu einem fünften Verfahrenszeitpunkt, zu dem die Bobinen von den Entnahmewagen entnommen und die Hülsen auf die Wickelwellen aufgeschoben sind.

In the drawing, an embodiment of the invention is shown. Show it:

Fig. 1

in a perspective view a turret winder of a stretch film plant, wherein on the winding shafts finished bobbins are arranged,

Fig. 2

in a perspective view the turret winder (without side panel), wherein some winding shafts are pivoted into a removal position,

Fig. 3

the top view of the turret winder Fig. 2 .

Fig. 4

in a perspective view the turret winder including an arrangement of picking trolley on rail systems at a first time of procedure, to which there are still no bobbins to be removed,

Fig. 5

in a perspective view the turret winder including removal carts at a second process time, to which the winding shafts are pivoted into a removal position and the removal carts are moved into a removal position,

Fig. 6

in a perspective view the turret winder including removal carts to a third process time at which the reels are removed from the picking trolley,

Fig. 7

in a perspective view the turret winder including removal trolley to a fourth process time at which the bobbins are removed from the picking trolley and sleeves are pushed onto the winding shafts, and

Fig. 8

in a perspective view the turret winder including removal trolley to a fifth process time at which the bobbins removed from the pickup trolley and the sleeves are pushed onto the winding shafts.

In Fig. 1 is to see a turret winder 1, which is part of a stretch film plant. The turret winder has a frame 2, the main components of which are two cheeks 8 and 9, which are connected to one another via bars 10 and are held at a defined distance.

In frame 2, a total of three winding devices 3, 4 and 5 are stored, on each of which film can be wound.

Each winding device 3, 4, 5 comprises at least two (shown in the embodiment, optionally also three or four) winding positions with respective winding shafts 11 which are rotatably arranged in turning crosses 12. Hereby the free winding length is shortened and the winding quality is increased during turning. However, this is known in the prior art, so that details for this need not be described (see the above-mentioned prior art).

It can be seen that the two lower winding devices 3 and 4 are arranged on a first lower, ie lower height level H ₁ , while the third winding device 5 is arranged at a higher second height level H ₂ . Accordingly, the two winding devices 3 and 4 in the direction of the vertical V are arranged deeper in the frame than the winding device. 5

But also in the direction of the horizontal H, and viewed in the radial direction on the axes of rotation of the winding devices 3, 4, 5, the winding device 5 is arranged offset to the devices 3 and 4 arranged in the frame 2.

With regard to the arrangement of the two lower winding devices 3, 4 in the frame 2 is further seen that these two devices adjacent to the side end portions 6 and 7, while the upper winding device 5 centrally between the end portions 6, 7, d. H. is arranged centrally between the cheeks 8 and 9.

However, there is an overlap x - seen in the axial direction of the winding devices - between the winding device 3 and the winding device 5. The same applies to the winding devices 4 and 5.

It is essential that the winding shafts 11 in the turning cross 12 are arranged pivotable about a vertically arranged axis A, wherein the pivot point S of the winding shaft 11 in an axial end portion 13 and 14 of the winding shaft 11 is arranged. The pivot points S of two winding shafts 11, which are located at the same height level H ₁ , lie in adjacent axial end regions 13 and 14 of the winding shaft 11.

As it is best in Fig. 2 and Fig. 3 can be seen, accordingly, the winding shafts 11 for the purpose of removing bobbins 17 (and for pushing sleeves 18) by a pivot angle α about the vertically oriented axis A can be pivoted. As it turns out for the two swung-out winding shafts 11 of the winding devices 3 and 5 (see, in particular Fig. 3 ), Accordingly, the winding shafts 11 can be swung out parallel to each other, so that a particularly space-saving and simultaneous removal of the bobbins 17 is possible.

This results in the equipment of the turret winder 1 with three winding devices 3, 4 and 5 in particular when two winding devices 3 and 4 located at the first height level H ₁ at the adjacent to both side end portions 6 and 7 of the frame 2 and the adjacent axial end portions 13 and 14 of the winding shafts 11 in the machine center M are (s. Fig. 3 ).

The removal of finished wound bobbins 17 and the pushing of sleeves 18 for winding the band-shaped material takes place automatically by means of a number of picking trolleys 15 which are movable on a rail system 16.

In the FIGS. 4 to 8 For this purpose, different stages of the process are outlined in chronological order.

According to Fig. 4 are the removal car 15 in the waiting position. It can be seen that on the winding shafts 11 'arranged at the rear, film is just being wound up, while on the winding shafts 11 "arranged at the front, the sleeves 18 for the next winding are pushed on.

As in Fig. 5 can be seen, the winding shafts 11 have now been turned by the turning crosses, so that the finished bobbins 17 come to lie in front and can be removed. For this purpose, the winding shafts 11 have been swung out about the axes A from the turret winder. The trolley 15 was previously moved into position and can accommodate the reels 17.

The peeling operation of the reels 17 of the winding shafts 11 is in Fig. 6 illustrated. In Fig. 7 you can see how the bobbins 17 are all taken off; now sleeves 18 are pushed onto the empty winding shafts. This process is according to Fig. 8 completed, ie the sleeves 18 are located on the winding shafts, which are next swung back.

After the wound in the turret winder reels 17 are finished wound, turning takes place by turning cross 12, so that the threaded on the winding shafts 11 sleeves 18 are brought into the position for winding of foil.

The process described is done again.

List of reference numbers :

1

turret

2

frame

3

winder

4

winder

5

winder

6

lateral end region

7

lateral end region

8th

cheek

9

cheek

10

Holm

11

winding shaft

11 '

winding shaft

11 "

winding shaft

12

turncross

13

axial end region

14

axial end region

15

removal trolley

16

rail system

17

reel

18

shell

H ₁

first height level

H ₂

second height level

H

horizontal

V

vertical

M

machine center

x

overlap

A

axis

S

pivot point

α

swivel angle

Claims (15)

Turret winder (1) of a cast film installation, comprising a frame (2) in which winding devices (3, 4, 5) for winding film are arranged, wherein at least three winding devices (3, 4, 5) are arranged in the frame (2) , being arranged two winding devices (3, 4) at a first height level (H ₁₎ and a third winding device (5) on a second, from the first height level (H ₁₎ of different height level (H _2), each winding device (3, 4, 5) has at least two winding shafts (11) for winding foil, wherein the at least two winding shafts (11) are mounted in a turning cross (12),
characterized in that
the winding shafts (11) in the turning cross (12) are arranged pivotable about a vertically arranged axis (A), wherein the pivot point (S) of the winding shaft (11) in an axial end portion (13, 14) of the winding shaft (11) is arranged, wherein the pivot points (S) of two winding shafts (11) which are at the same height level (H ₁ ) lie in adjacent axial end regions (13, 14) of the winding shaft (11). Turret winder according to claim 1, characterized in that the maximum pivoting angle (α) is 20 °, preferably at most 15 °. Turret winder according to claim 1 or 2, characterized in that at least one winding shaft (11) of a winding device (3) at the first height level (H ₁ ) and at least one winding shaft (11) of a winding device (5) at the second height level (H ₁ ) in the same direction of rotation and parallel to each other about the vertically arranged axis (A) are arranged pivotably. Turret Winder according to one of claims 1 to 3, characterized in that it further comprises at least one withdrawal carriage (15) for wound sheet, said discharging carriage (15) on an at least partially linearly extending rail system (16) is movable in translation, wherein the direction of the rail system (16) under the maximum pivot angle (α) to the frame (2) is aligned. Turret according to one of claims 1 to 4, characterized in that the first height level (H ₁ ) is lower than the second height level (H ₂ ). Turret winder according to one of Claims 1 to 5, characterized in that two winding devices (3, 4) located at the first height level (H ₁ ) adjoin two lateral end regions (6, 7) of the frame (2) and the adjacent axial end regions (13, 14) of the winding shafts (11) lie in the machine center (M). Turret winder according to one of claims 1 to 6, characterized in that located on the second height level (H ₂ ) winding device (5) between the two lateral end portions (6, 7) of the frame (2) is arranged centrally. Turret according to claim 6 and 7, characterized in that the axial extension of the at the second height level (H ₂ ) located winding device (5) with the axial extensions of the two located on the first height level (H ₁ ) winding devices (3, 4 ) overlaps, wherein the overlap (x) is preferably between 5% and 50% of the axial extent of one of the winding devices (3, 4, 5). Turret winder according to one of claims 1 to 8, characterized in that located on the first height level (H ₁ ) winding devices (3, 4) and located on the second height level (H ₂ ) winding device (5) in the radial direction Rotary axis of the winding devices (3, 4, 5) and in the direction of the horizontal (H) offset from one another. Turret according to one of claims 1 to 9, characterized in that each of the winding devices (3, 4, 5) is designed to wind films up to a winding diameter of 600 mm. Turret winder according to one of claims 1 to 10, characterized in that each winding device (3, 4, 5) is assigned a measuring roller for determining the tension in the film to be wound. Turret according to one of claims 1 to 11, characterized in that each winding device (3, 4, 5) is equipped with a control system for reducing or preventing vibrations to change or eliminate the critical speed of the winding device (3, 4, 5) to be able to. Turret winder according to one of claims 1 to 12, characterized in that the frame (2) has two lateral cheeks (8, 9) which are connected to one another via bars (10). Turret winder according to one of claims 1 to 13, characterized in that all winding devices (3, 4, 5) are associated with a common cutting device, which is designed for longitudinal separation of the film web. Turret according to one of claims 1 to 14, characterized in that it is part of a stretch film plant.

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