EP3666700A1 - Device for winding and winding replacement for web-shaped material and method for same - Google Patents

Abstract

In the case of a device for winding up and changing rolls of sheet-like materials and a method for operating the device with two independently driven central drives (3, 4) for driving winding shafts (15), a drivable winding shaft guide (6), a contact roller unit (9) and separating devices (11, 12) Right and left winding is to be realized, the device being designed without a pre-winding point. This is achieved by changing the winding shaft guide (6) together with a first central drive (3), which drives the finished winding (17) on a winding shaft (15), from the winding position (WP) to the parking position (PP) for changing the winding shaft. It can be moved and decoupled that a second central drive (4) can then be coupled to the winding shaft guide (8) and moved from its parking position (PP) to the winding position (WP), where the second central drive (4) with a new winding shaft (WW) It can be coupled and driven that the contact roller unit (9) can be moved against the new winding shaft (15) and that the web-shaped material (W) can be separated by the separating device (11, 12) and can be wound up to form a new winding (W).

Description

The invention relates to a device for winding and changing the winding of web-shaped material, in particular tubular films or film webs, which have a machine housing with guides for a winding shaft guide, two independently drivable central drives for driving winding shafts, a drivable winding shaft guide, which cooperates with a central drive and these on the guides between a parking position and a winding position, a contact roller unit which interacts with the winding shaft driven by the respective central drive in the winding position, separating devices for separating the web-like material, winding shaft transport units for feeding new winding shafts for changing the winding shaft and a reel dispenser and a method for this

Winders are used to wind up sheet-like materials, such as plastic films, paper webs, metal foils or textiles. The material webs to be wound come directly from the manufacturing process and are brought into rolls, so-called coils, for further processing.

Winders also come for foils e.g. from blown film lines for use. In these systems, tubular films are formed at high speeds and, after they have been laid flat, they have to be wound up continuously on rolls without the production speed being reduced in the system. If the winding has reached a predefined size, it has to be changed, this also happens without stopping the production of the endless material web or changing the production speed. There are various mechanical engineering options and processes here.

Known winding devices include turret winders, contact winders and central winders.

In a turret winder, one or two opposite turntables are rotatably mounted in a machine frame, which accommodate at least two rotatably mounted winding stations. In operation, a first winding station is in the winding position and a second winding station is in a loading or unloading position in order to take up a new winding shaft or to deliver a finished winding. If the winding has reached its target size in the winding position, the first and the second winding point change their position by turning the turntable and the next winding can be wound up. The disadvantage here is that a large installation space is required for large winding diameters.

An alternative to the turret winders are winders with a linear movement of the winding stations, including contact and central winders

In the case of the contact winder, the winding to be wound is pressed against a driven contact roller, the winding is not driven separately. A so-called pre-winding point is necessary for these winders.

With the central winder, the winding is driven centrally in the winding station. It can also be pressed against the contact roller or operated with a gap to the contact roller.

A disadvantage of the latter two winders is that a transfer of the roll from the pre-winding point to the winding point is necessary when changing the reel. The pressure of the roll against the contact roller is not defined, so that different winding conditions arise.

Winders are designed for left winding, right winding, or both. The winding direction of the web-shaped material depends on the subsequent process steps and on which side of the film must be on top for this process step. By left or right winding, the pretreated side (corona), which is printed in a subsequent process step, can be wound inside or outside. Furthermore, during the extrusion, the arrangement of the sealing layer in the coextrusion composite is independent of a required interior or outside arrangement during winding. The winding shaft then has the corresponding direction of rotation.

In the DE 44 28 249 a central winder is disclosed. The winding device has two winding points arranged in a winding frame, which work in conjunction with a contact roller. The winding shafts of the two winding stations are each driven independently of motors. The winding stations can be moved on horizontal guide rails between the winding station and the delivery point for the finished winding. The contact roller is motor driven and can be lowered. When changing the winding station, it is moved vertically downwards between the winding position and a parking position. The new winding shaft is inserted in the idle state, while the second winding shaft is in the operating state. A disadvantage of this design is that the winding shaft bearing requires an additional drive. This design of a central winder requires a defined winding direction, depending on the requirement, it is not possible to choose between right or left winding.

Films are structured differently with regard to the number of layers and the types of material of the layers. They do not have to be symmetrical in their layer structure. Each blown film has a tube inside and a tube outside. When winding, it is desirable that, depending on the type of film layers and the type of further processing of the film, a special side is on the outside or inside. To make this possible, it is important that winders are designed to be clockwise and counterclockwise.

The invention is therefore based on the object of providing a solution which makes it possible to provide a winder which enables both left-hand and right-hand winding, and the winder is designed without a pre-winding point.

In a winder of the type described in the introduction, the object is achieved according to the invention by the characterizing part of the main claim.

The winder according to the invention has a winding point arranged in a machine housing. This winding station has two central drives that are used alternately.
The central drives are arranged one on each side of the machine housing. These interact with a driven winding shaft guide. The respective central drive is coupled to the driven winding shaft guide and moved between a parking position and a winding position on guides. The central drives are used alternately. The central drive in use is coupled to the winding shaft guide, the second central drive is firmly coupled to its waiting position.

In one embodiment of the invention, the central drives are arranged on the outside of the machine frame and cooperate with the winding shaft guide arranged inside, which moves on essentially horizontal guides, ideally on horizontal guides.
In a preferred embodiment, the winding shaft also lies on a support which is arranged parallel and above the winding shaft guide. The central drive is preferably coupled into the waiting position on the machine housing or a separate frame.

In the winding position, a contact roller unit interacts with the winding shaft or the winding. The contact roller unit is designed to be movable, e.g. pneumatic or electric. It can be moved essentially horizontally between the winding position and a contact roller parking position. The contact roller unit comprises the contact roller, a guide and the contact pressure. Alternatively, the winding can also be wound up with a gap, then the contact roller does not press against the winding, the film runs over the contact roller.

Separating units are arranged above and below the contact roller unit. They have two functions. On the one hand, they raise or lower the film web when changing the winding to bring the new winding shaft into the winding start position, and on the other hand, they separate the film web during the winding shaft changing process. The separation and lifting can also be carried out in separate devices, so that a lifting or lowering unit and a separate separation unit are arranged above and below the contact roller unit.

The device also has a winding shaft transport unit for the newly inserted winding shafts. It is designed essentially vertically and is arranged in the area between the winding shaft guide and the contact roller unit. Depending on the winding direction, the new winding shaft is transported from above or below via the winding shaft transport unit to the winding level above or below the film web.

In the event that the winding is wound clockwise, the new winding shaft is moved from below to the winding level using the winding shaft transport unit.
In the event that the winding is to be wound counterclockwise, the winding shaft is inserted into the winding shaft transport unit from above and moved down to the winding level.

In a preferred embodiment, the new winding shafts can be transported via further winding shaft transport units to the first-mentioned winding shaft transport unit and transferred to the latter so that the latter transports them in the direction of the winding plane.

Alternatively, the winding shafts are fed laterally into the machine and placed in the winding shaft transport unit.

In a method for winding and changing the winding, the object is achieved according to the invention by the characterizing part of the subsidiary claim.

In the method according to the invention, a winding shaft is received by a first central drive and the shaft winding guide in winding operation. The central drive drives the winding shaft and the film web, which is guided to the winding shaft via a contact roller, is wound on the winding shaft. The contact roller is pressed onto the winding. For this purpose, the contact roller is designed to be movable. As the diameter increases, the winding moves with the Central drive and the winding shaft guide in the direction of the roll output device, away from the contact roller. The contact roller presses permanently against the roll, so that no air is wrapped in it, the film does not run and can therefore ensure uniform roll quality with a defined contact pressure. The winding is wound up until the target diameter is reached.

If the target diameter of the winding is reached, the winding change is prepared. First, the winding shaft feed and the winding shaft change for the case of right winding are described.
A new winding shaft is inserted into the winding shaft transport device and guided upwards into a first parking position in front of the winding level.

The finished roll with the first central drive and the winding shaft guide is moved in the direction of the storage arms of the roll output device.
This movement is achieved by drives on the winding shaft guide. In the front position, the central drive uncouples from the winding shaft guide and is firmly coupled to its end position, for example to the machine housing wall. The central drive continues to drive the winding. The contact roller unit moves a little to the rear, away from the winding position. Now the second central drive, on the opposite side of the first central drive, decouples from its parking position and couples with the winding shaft guide. The winding shaft guide and the second central drive coupled to it move in the direction of the contact roller unit to the winding position.

The winding position is not a fixed location, but is the position in which the central drive, in cooperation with the contact roller, winds the web-like material onto the winding. The position moves with increasing winding diameter on the guides in the direction of the reel dispenser.

The new winding shaft is now moved with the winding shaft transport unit from the first parking position upwards in the direction of the winding plane to a second parking position. The lower separating device is pivoted into the film run as a lifting device and the film web is raised to make room for the new winding shaft. The winding shaft guide runs with the second Central drive in a winding start position. The new winding shaft is moved upwards from the second parking position to the winding start position. The winding shaft is now coupled to the second central drive and the winding shaft guide and moved together into the winding position. Now the second central drive drives the winding shaft.

The holder for the winding shaft of the winding shaft transport unit is moved downwards, the contact roller unit moves to the winding shaft, the lower separating device swivels into the cutting position and the film is separated. Depending on the version, these steps take place very promptly or simultaneously. The film is now wound onto the new winding shaft by the second central drive.

The remaining material web is wound on the finished roll by the first central drive. The first central drive is decoupled from the finished roll and the finished roll is released from the winder via the roll output device. The roll dispenser can be hydraulic.

In the following, the winding shaft feed and the winding shaft change for the case of left winding are described.
A new winding shaft is inserted into the top of the winding shaft transport unit and moves to a first parking position above the winding level. The finished reel with a central drive travels in the direction of the roll dispenser by means of a winding shaft guide, is placed in front of the depositing arms and the first central drive decouples from the winding shaft guide and couples into its parking position while it continues winding. The new winding shaft is moved into a slightly lower parking position above the winding level. The contact roller moves backwards from its winding position. The upper separation unit swings down and pushes the material web down a little. The second central drive couples out of its parking position and into the winding shaft guide and moves in the direction of the winding position. The new winding shaft now has enough space and is moved to the winding start position. The winding shaft is coupled to the second central drive and the winding shaft guide. The central drive drives the winding shaft.

Now the winding shaft guide with the second central drive and the new winding shaft move into the winding position.
The holder for the winding shaft of the winding shaft transport unit is moved down. The upper separating device moves back into its upper parking position, the contact roller moves to the new winding shaft. The lower separator swings in and the material web is separated. Depending on the version, these steps take place very promptly or simultaneously.
The new roll is wound up and the finished roll leaves the winder via the roll output device.

The functions of lifting or pressing and cutting the separating devices can also be implemented in separate devices, for both left and right winding.

Alternatively, the winder can also be designed for winding with a gap, in which case the contact roller does not have to be pressed against the winding.

Such a winder enables permanent winding without the winding conditions changing due to undesired external disturbances. The material web is wound from the beginning under defined conditions such as web tension and contact pressure and does not experience any disturbances due to external influences, which otherwise occur at pre-winding stations, when the winding is transferred from the pre-winding station to the winding station. The winding has a stable winding core and there are no differences between different winding layers, since there is no pre-winding point. The winder also allows left and right winding.

Further details, features and advantages of the subject matter of the invention emerge from the subclaims and from the following description of the associated drawings, in which - by way of example - a preferred exemplary embodiment of the invention is shown.

• Figur 1: eine Seitenansicht des erfindungsgemäßen Wicklers
• Figur 2: eine Seitenansicht des Wicklers beim Wickelwechsel für den Fall des Rechtswickelns
• Figur 3: eine Seitenansicht des Wicklers beim Wickelwechsel für den Fall des Linkswickelns

In the drawings:

• Figure 1 : a side view of the winder according to the invention
• Figure 2 : a side view of the winder when changing the wrap in case of right winding
• Figure 3 : a side view of the winder when changing the wrap in case of left winding

In Figure 1 A preferred embodiment of the winder (1) according to the invention for winding and changing the winding of film webs, especially tubular films, is shown.
The winder (1) has a machine housing (2). A first central drive (3) and a second central drive (4) are arranged on guides (5) in an area of the winder (1) on both sides of the outside of the machine housing (2). A driven winding shaft guide (6) is arranged at the same height on the inside of the machine housing (2). This works together with the central drives (3) or (4) and moves them back and forth on the horizontal guides (5). The central drives (3) and (4) take up winding shafts.

On one side of the guides (5), in the Figure 1 on the right, a reel dispenser (14) is arranged, while on the other side of the guides (5) in which Figure 1 left, a vertical shaft transport unit (8) and a contact roller unit (9) is arranged. A support (13) for the winding shafts is arranged above and parallel to the guides (5).
A horizontal winding shaft transport unit (7) is arranged below this unit, which receives new winding shafts and transports them below the winding shaft guide (6) in the direction of a second vertical winding shaft transport unit (8), which transports them upwards in the direction of the winding position. The vertical winding shaft transport unit (8) can also take up new winding shafts from above and transport them downwards in the direction of the winding position if the windings are to be wound up in the opposite winding direction.
In a second area of the machine housing (2) (in the Figure 1 left) at the level of the guides (5) a contact roller unit (9) is arranged. It interacts with the winding shaft (15) or the winding (17) that is being formed. For example, it is designed to be pneumatically movable here. A deflection roller (10) is in turn arranged behind it. Below and above the contact roller unit (9) A separating device (11, 12) is arranged on the winding plane. They have the function of lifting, lowering or separating the film web.
On the opposite side of the machine frame (2) receiving the contact roller unit (9) following the guides (5) (in the Figure 1 right), the hydraulic roll dispenser (14) is arranged.

With the help of Figure 1 the winding of a film web is first described. The winding shaft (15) is coupled to a first central drive (3) arranged on the outer wall of the machine housing (2), and to the driven winding shaft guide (6) arranged on the inside of the machine housing (2). This first central drive (3) winds up the film web (16) in the winding position (WP), which is guided into the winder (1) via the deflection roller (10). The contact roller unit (9) presses on the winding shaft (15) or on the winding (17). With increasing diameter, the winding (17) with the winding shaft guide (6) and the first central drive (3) moves in the direction of the roll dispensing device (14). The winding shaft rests on a support (13) arranged on both sides of the machine housing (2).

When the winding (17) has reached its target diameter, the winding shaft change is prepared.

The winding change is now first for right winding Figure 2 described. For this purpose, a new winding shaft (18) is inserted into the horizontal winding shaft transport unit (7) arranged below and transported in the direction of the vertical winding shaft transport unit (8), transferred to it and moved up to a parking position 1 (PP1). The first central drive (3) and the winding shaft guide (6) move the finished winding (17) in the direction of the storage arms (19) of the roll output device (14). The second central drive (4) is in its park position (PP) (not shown here). Now the contact roller unit (9) is horizontally away from the winding (17) (in the Figure 2 to the left), moved out of its winding position. The new winding shaft (18) is moved from parking position 1 (PP1) further up to parking position 2 (PP2). The first central drive (3) of the finished winding (17) decouples from the winding shaft guide (6) and is coupled to the outside of the machine housing wall (2) in its park position PP and continues to turn the wrap (17). Some of these steps run simultaneously. The second central drive (4) decouples from its parking position (PP) on the machine housing wall (2) and couples with the winding shaft guide (6) and is moved in the direction of the contact roller unit into a winding start position (cf. Figure 1 ). The lower separating device (12) is pivoted into the film web (16) and lifts it so that the new winding shaft (18) can move from the parking position 2 (PP2) to the winding start position. Now the winding shaft guide (6) moves with the second central drive (4) into the winding start position in which the new winding shaft (18) is located and the second central drive (4) couples to the winding shaft (18) and drives the winding shaft (18).
The hook (20) of the vertical winding shaft transport unit moves down. The winding shaft guide with the second central drive and the winding shaft move into the winding position (WP). The lower separator (12) swivels into the cutting position. The contact roller unit (9) moves to the new winding shaft (18). The film web (16) is separated and the lower separating device (12) swings back. The new wrap is formed. These steps can be carried out very promptly or simultaneously.
The finished roll (17) can now be released from the winder (1) via the roll dispenser (14).

The wrap change is now on for left winding Figure 3 described. It is assumed that the winding (17) in the winder (1) is being wound up with the first central drive (3). For the left winding of film webs, the new winding shaft (18) is inserted from above into the vertical winding shaft transport unit (8) and moved into a parking position 1 (PP1) above the winding level. The first central drive (3) and the winding shaft guide (6) move the finished winding (17) in front of the placement arms (19) of the roll output device (14). The second central drive (4) is in its park position PP. Now the contact roller unit (9) from the winding (17) away (in the Figure 1 to the left), moved out of its winding position. The new winding shaft (18) is moved from parking position 1 (PP1) in the direction of the winding plane to parking position 2 (PP2). The first central drive (3) of the full winding (17) decouples from the winding shaft guide (6) and couples to the outside Machine housing wall (2) in its parking position (PP). Some of these steps run simultaneously. The second opposite central drive (4) decouples from its parking position (PP) in the machine housing wall (2) and couples with the winding shaft guide (6) and both move in the direction of the contact roller unit (9), into the winding start position (cf. Figure 3 ). The upper separating device (11) is pivoted into the film web (16) and presses the film web (16) down so that the new winding shaft (18) can move from the parking position 2 (PP2) to the winding start position. Now the winding shaft guide (6) moves with the second central drive (4) into the winding start position in which the new winding shaft (18) is located and the second central drive (4) couples to the winding shaft (18) and drives the winding shaft (18).
The hook (20) of the vertical winding shaft transport unit (8) moves down. The winding shaft guide, the second central drive and the new winding shaft move into the winding position (WP). The upper separator (11) swings back. The lower separating device (12) swivels upwards into the cutting position. The contact roller unit (9) moves to the new winding shaft (18). The film web (16) is separated and the lower separating device (12) swings back. These steps can be carried out very promptly or simultaneously.

The new wrap is formed. The finished reel (17) can now be released from the winder (1) via the reel dispenser (14).

Reference numerals

• 1 winder
• 2 machine housings
• 3, 4 central drives
• 5 tours
• 6 driven winding shaft guide
• 7 horizontal winding shaft transport unit
• 8 vertical winding shaft transport unit
• 9 contact roller unit
• 10 deflection roller
• 11, 12 lifting and separating device
• 13 support
• 14 hydraulic roll dispenser
• 15 winding shaft
• 16 film web
• 17 wraps
• 18 new winding shaft
• 19 storage arms
• 20 hooks

• PP parking position
• PP 1 parking position 1
• PP 2 parking position 2
• WP winding position

Claims (14)

Device (1) for winding and changing the winding of sheet-like materials comprising - a machine housing (2) with guides (5) for a winding shaft guide (6), two independent central drives (3, 4) for driving winding shafts (15), a drivable winding shaft guide (6), which interacts with a central drive (3, 4) and moves it on the guides (5) between a parking position (PP) and a winding position (WP), a contact roller unit (9) which interacts with the winding shaft (15) driven by the respective central drive (3, 4) in the winding position (WP), - Separating devices (11, 12) for separating the web-like material (16), - winding shaft transport units (7, 8) for feeding new winding shafts (18) for changing the winding shaft, - a roll dispenser (14) characterized, that the winding shaft guide (6) can be moved from the winding position (WP) to the parking position (PP) together with a first central drive (3) which drives the finished winding (17) on a winding shaft (15) for a winding shaft change, - that the first central drive (3) can be decoupled from the winding shaft guide (6) and can be coupled into its parking position (PP), - that a second central drive (4) can be coupled to the winding shaft guide (6) and moved from its parking position (PP) to the winding position (WP), where the second central drive (4) can be coupled and driven with a new winding shaft (18), - That the contact roller unit (9) in the direction of the new winding shaft (18) can be moved and cooperates with it, - And that the web-shaped material (16) can be separated by the separating device (11, 12) and can be wound up into a new winding. Device (1) according to claim 2, characterized in that
the new winding shaft (18) can be transported from below via a winding shaft transport unit (8) into the winding position (WP) for winding the web material (16) to the right. Device (1) according to claim 2, characterized in that the new winding shaft (18) for left winding of the web-like material (16) can be transported from above via a winding shaft transfer unit (8) into the winding position (WP). Device (1) according to claim 1 or 2, characterized in that
the separating units (11, 12) are arranged above and below the winding position (WP) of the winding shaft (18) and optionally carry out lifting, lowering and separation of the web-like material (16). Device (1) according to claim 5, characterized in that
for right winding, the sheet material (16) can be raised and cut through by means of a lower separating unit (12). Device (1) according to claim 5, characterized in that
for left-hand winding, the web-shaped material (16) can be pressed down by means of an upper separating unit (11) and can be severed using a lower separating device (12). Device (1) according to one of the preceding claims, characterized in that
the web-like material (16) is film webs, composite film webs or tubular films. Method for winding and changing the winding of sheet material (16) with the step: - Winding the web material (16) on a first winding shaft (15) which is driven by a first central drive (3), the first central drive (3) together with a driven winding shaft guide (6) acts, the winding shaft (15) cooperating with a contact roller unit (9) for winding the winding (17) characterized in that
the change of winding comprises the further steps: - edef move the finished roll (17), which is driven by the first central drive (3), with the aid of a drivable winding shaft guide (6) from the winding position (WP) into a parking position (PP), - decouple the first central drive (3) from the winding shaft guide (6) and couple into its parking position (PP), the central drive (3) driving the winding (17) further, - couple the winding shaft guide (6) to a second central drive (4) and move the second central drive (4) from its parking position (PP) to the winding position (WP), - couple the second central drive (4) with a new winding shaft (18) and drive the new winding shaft (18), - Move the contact roller unit (9) in the direction of the winding shaft (18) - separating the web-like material (16) by separating devices (11, 12) and winding up the new roll, - Place the finished roll (17) with the help of a roll dispenser (14). A method according to claim 9, characterized in that
a new winding shaft (18) for winding the web-shaped material (16) to the right is moved from below via a winding shaft transport unit (8) into the winding position (WP). A method according to claim 9, characterized in that
a new winding shaft (18) for left-hand winding of the web material (16) is moved from above via a winding shaft transport unit (8) into the winding position (WP). A method according to claim 12, characterized in that
when winding the web-like material to the left, above the winding position (WP) arranged separating unit (11) swings into the web-shaped material (16) and presses it down, the winding shaft (18) is moved into the winding position (WP), the contact roller unit (9) is moved into the winding position (WP) and the upper one Swiveling separating device (11) back, then swiveling the lower separating unit (12) into the web-shaped material (16) and severing the web. A method according to claim 12, characterized in that
which, when winding the sheet material (16) to the right, pivots the separating unit (12) arranged below the winding position (WP) into the sheet material (16) and lifts it, the winding shaft (18) is moved into the winding position (WP), the contact roller unit ( 9) is moved into the winding position (WP) and the lower cutting unit (12) swivels into the cutting position and separates the web. Method according to one or more of claims 8 to 12, characterized in that
the method is carried out in a device (1) according to claims 1 to 7. Method according to one or more of claims 8 to 13, characterized in that
the web-like material (16) is film webs, composite film webs or tubular films.

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