DE202012002466U1 - Turret winder of a cast film plant - Google Patents

Abstract

Turret winder (1) of a cast film plant, comprising a frame (2) in which winding devices (3, 4, 5) for winding film are arranged, characterized in that three winding devices (3, 4, 5) in the frame (2) are arranged, two winding devices (3, 4) being arranged on a first height level (H1) and the third winding device (5) being arranged on a second height level (H2) different from the first height level (H1).

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.

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 what is known as a stretch film installation, in which case, for example, the production of so-called pallet stretch film can take place on it.

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

It should be noted in the present Wendewicklern that they reach a certain critical deflection due to the size to be processed (maximum diameter of 450 mm 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 leads to space problems, so far always only solutions were envisaged, in which two adjacent winding devices are used in the turret winder.

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.

The solution of this object by the invention is characterized in that three winding devices are arranged in the context of the turret winder, wherein two winding devices is arranged at a first height level and the third winding device at a second, different from the first height level height level.

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

The two winding devices located at the first height level preferably adjoin at two lateral end regions of the frame. However, the winding device located at the second height level is preferably arranged centrally between the two lateral end regions of the frame. The axial extent of the winding device located at the second height level overlaps, according to a preferred embodiment of the invention, with the axial extent of the two winding devices located at the first height level. It is provided, for example, that the overlap between 5% and 50% of the axial extent of one of the winding devices.

The winding devices located at the first height level and the winding device located at the second height level are further arranged according to a preferred embodiment of the invention in the direction radially to the axis of rotation of the winding devices and in the direction of the horizontal offset from each other; Hereinafter, the one winding device is arranged in front of or behind the other two winding devices.

Each winding device preferably has the same axial length.

Each of the winding devices is further preferably designed to wind films up to a winding diameter of 450 mm.

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

Each winding device can furthermore be equipped with a measuring system for detecting vibrations in order to be able to detect the critical speed of the winding device.

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

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 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 the total of three winder (winding devices) is optimally carried out 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.

In the drawing, an embodiment of the invention is shown. The single figure shows a perspective view of a turret winder of a stretch film plant.

So in the figure is a turret winder 1 to see, which is part of a stretch film plant. The turret winder has a frame 2 on whose main components are two cheeks 8th and 9 are that over spars 10 are connected to each other and kept at a defined distance.

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

Every winding device 3 . 4 . 5 comprises at least two (possibly also three or four) winding positions, whereby the free winding length can be shortened and the winding quality can be increased when turning. However, this is known in the prior art, so details of this need not be described.

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 arranged in the direction of the vertical V deeper in the frame than the winding device 5 ,

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

With regard to the arrangement of the two lower winding devices 3 . 4 as part of 2 It can also be seen that these two devices at the lateral end portions 6 respectively. 7 adjacent, while the upper winding device 5 centric between the end areas 6 . 7 ie centrally between the cheeks 8th and 9 is arranged.

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

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

H ₁

first height level

H ₂

second height level

H

horizontal

V

vertical

x

overlap

Claims (13)

Turret Winder ( 1 ) of a cast film plant comprising a frame ( 2 ) in which winding devices ( 3 . 4 . 5 ) are arranged for the winding of film, characterized in that three winding devices ( 3 . 4 . 5 ) as part of ( 2 ) are arranged, wherein two winding devices ( 3 . 4 ) at a first height level (H ₁ ) and the third winding device ( 5 ) is arranged at a second, from the first height level (H ₁ ) different height level (H ₂ ). Turret according to claim 1, characterized in that the first height level (H ₁ ) is lower than the second height level (H ₂ ). Turret according to claim 1 or 2, characterized in that the two located on the first height level (H ₁ ) winding devices ( 3 . 4 ) at two lateral end regions ( 6 . 7 ) of the frame ( 2 ). Turret according to one of claims 1 to 3, characterized in that at the second height level (H ₂ ) located winding device ( 5 ) between the two lateral end regions ( 6 . 7 ) of the frame ( 2 ) is arranged centrically. Turret according to claim 3 and 4, characterized in that the axial extent of the located on the second height level (H ₂ ) winding device ( 5 ) with the axial extensions of the two winding devices located at the first height level (H ₁ ) ( 3 . 4 ) overlaps. Turret according to claim 5, characterized in that the overlap (x) between 5% and 50% of the axial extent of one of the winding devices ( 3 . 4 . 5 ) is. Turret according to one of claims 1 to 6, characterized in that located at the first height level (H ₁ ) winding devices ( 3 . 4 ) and at the second height level (H ₂ ) located winding device ( 5 ) in the direction radial to the axis of rotation of the winding devices ( 3 . 4 . 5 ) and offset in the direction of the horizontal (H) to each other. Turret according to one of claims 1 to 7, characterized in that each winding device ( 3 . 4 . 5 ) has the same axial length. Turret according to one of claims 1 to 8, characterized in that each of the winding devices ( 3 . 4 . 5 ) is designed to wind films up to a winding diameter of 450 mm. Turret according to one of claims 1 to 9, characterized in that each winding device ( 3 . 4 . 5 ) is associated with a measuring roller for determining the tension in the film to be wound. Turret according to one of claims 1 to 10, characterized in that each winding device ( 3 . 4 . 5 ) is equipped with a measuring system for detecting vibrations in order to determine the critical speed of the winding device ( 3 . 4 . 5 ) to detect. Turret according to one of claims 1 to 11, characterized in that the frame ( 2 ) two lateral cheeks ( 8th . 9 ), which are supported by spars ( 10 ) are interconnected. Turret according to one of claims 1 to 12, characterized in that it is part of a stretch film plant.

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