EP1184312A1 - Method of winding a running web and winding device - Google Patents

Abstract

The method for winding plastic sheet (1) use a first core (2) mounted on a first pair of arms (5) attached to a central pivot (4) and on which a roll (6) of sheet is formed, in contact with a contact roller (7). A second pair of arms (8) carries a second core (3) and is swivelled into a storage position (A) with the core fitting into a recess in a transverse cutting device. When a roll is finished on the first core, the arms (5) are swivelled to a new position (E) and simultaneously the second core is swivelled to replace it, together with the cutting device. This cuts the plastic sheet and its end is wound on to the new core. An independent claim is included for a machine for carrying out the method.

Description

The invention relates to a method for winding a tapered film web, in particular plastic film web on a winding tube. The invention further relates to a Winding device for performing the method. - At the incoming film web, in particular plastic film web it is usually one with high Speed fed web. That is why they are special Measures required to ensure a reliable function Winding the film web realized on winding tubes can be.

In the context of the known methods or the known Winding devices becomes an incoming plastic film web first wound on a first winding tube, that between a first pair of about a central axis pivoting mounting arms is included. If the on the first winding tube, the resulting film roll, which also Coil is called, is completely wound, the first swings Pair of pick-up arms with the finished wound film wrap after a transverse separation of the film web into one Removal position. The new one created during cross-cutting The beginning of the web is wound on a second winding tube, who now have a second pair from around the Central axis swiveling mounting arms in the Winding position was transferred. The two pairs of Arms are clockwise or counterclockwise Can be swiveled clockwise around the central axis. As part of the known method, the film web is alternately on one between the first pair of support arms recorded winding tube and one between the second pair wound from the take-up winding sleeve.

In the method known from practice the above explained type is usually a so-called "Contact winding" performed. When winding up the Foil wrapping on a winding tube is one Contact roller in contact with the film roll. It can either the winding tube on which the film roll is wound is driven or the contact roller rotating become. To in the known method and associated winding device a reliable and informal change of an already wound film roll in the winding position against a new one to be wound Reaching the winding tube is usually two Contact rollers required. The winding devices in question are therefore complex and complex. The known method also has a disadvantage complicated control. It is relatively long Change times for changing the cores in the winding position required and therefore longer winding times overall. The known method is accordingly in need of improvement.

In contrast, the invention is the technical problem is based on a process of the type mentioned at the beginning specify with the simple, uncomplicated and at the same time functionally reliable, a quick changing of the winding tube can be realized in the winding position. The Invention is further based on the technical problem a winding device for performing the method to specify, which is characterized by low expenditure on equipment distinguished.

wobei ein zweites Paar von um die Zentralachse schwenkbaren Aufnahmearmen während des Aufwickelns des Folienwickels in der Wickelposition, in eine Aufnahmeposition verschwenkt wird,

wobei das zweite Paar von Aufnahmearmen eine neue zweite Wickelhülse aufnimmt und wobei die neue zweite Wickelhülse in der Aufnahmeposition von der Aufnahmeeinrichtung einer Quertrenneinrichtung aufgenommen wird,

wobei anschließend das erste Paar von Aufnahmearmen mit dem auf der ersten Wickelhülse aufgewickelten Folienwickel in Richtung einer Entnahmeposition bewegt wird und wobei gleichzeitig die von dem zweiten Paar von Aufnahmearmen und in der Aufnahmeeinrichtung der Quertrenneinrichtung aufgenommene neue zweite Wickelhülse mitsamt der Quertrenneinrichtung in die Wickelposition geschwenkt wird und die neue zweite Wickelhülse dabei an die einzige Kontaktwalze angeschwenkt wird,

wobei die Quertrennung der Folienbahn mit der Quertrenneinrichtung durchgeführt wird und ein dabei entstehender neuer Bahnanfang an die neue zweite Wickelhülse angewickelt wird,

wobei anschließend der fertige Folienwickel mit der ersten Wickelhülse in der Entnahmeposition aus dem ersten Paar von Aufnahmearmen herausgenommen wird, und

wobei daraufhin das erste Paar von Aufnahmearmen wieder in die Aufnahmeposition überführt wird, undsoweiterfort.

To solve this technical problem, the invention teaches a method for winding an incoming film web, in particular a plastic film web, onto a winding tube, a film winding being wound up in a winding position on a first winding tube, which is received between a first pair of receiving arms pivotable about a central axis, and a contact roller is held in contact with the film roll during winding,

a second pair of receiving arms pivotable about the central axis being pivoted into a receiving position during the winding of the film roll in the winding position,

wherein the second pair of receiving arms receives a new second winding tube and the new second winding tube is received in the receiving position by the receiving device of a cross-cutting device,

wherein the first pair of receiving arms is then moved with the film roll wound on the first winding tube in the direction of a removal position and at the same time the new second winding tube received by the second pair of receiving arms and in the receiving device of the cross-separating device is pivoted into the winding position together with the cross-separating device and the new second winding tube is swiveled onto the single contact roller,

wherein the transverse separation of the film web is carried out with the transverse separating device and a new beginning of the web that is created is wound onto the new second winding tube,

wherein the finished film roll with the first winding tube in the removal position is then removed from the first pair of receiving arms, and

whereupon the first pair of pick-up arms are returned to the pick-up position, and so on.

It is within the scope of the invention that the new second Except for the winding tube in the receiving position of a pair of holding arms also from the holding device the cross cutting device is added. - Expedient when swiveling the second Winding sleeve in the winding position or when swiveling the second winding tube to the only contact roller Cross cutting of the film web with the cross cutting device carried out. - It is also within the scope of the invention that a new winding tube in the first pair of Holding arms is inserted after the finished film wrap with the first winding tube in the removal position has been removed from the first pair of support arms.

The method according to the invention thus works with at least two pairs of holding arms, each for holding a winding tube are designed and counterclockwise or alternatively clockwise around the same Central axis are rotatable. The arms are included in pairs, independently rotatable. It is in the Framework of the invention that the length of the receiving arms remains constant during pivoting. A couple of Holding arms is designed so that the two holding arms take up a winding tube at its winding tube ends.

According to a preferred embodiment of the invention, the radial distance of a new winding tube from the central axis on the way of the new winding tube from the receiving position kept constant in the winding position. The new Winding shaft is both from the second pair of Arms as well as the receiving device of the Cross cutting device added. It is within the Invention that the cross cutting device during the Movement of the new winding tube from the take-up position the winding position is pivoted about a pivot axis and the radial distance between the receiving device and the Swivel axis is changed. So the radial distance the new winding tube is always the same to the central axis remains, the cross cutting device is over during the swiveling process the swivel axis and when transferring the new winding tube in the winding position expediently with respect to them Length (distance of the mounting device to the swivel axis) variable. The receiving device or the Area of the transverse separating device assigned to the receiving device can thus when swiveling around the swivel axis retract as it were towards the swivel axis.

According to one embodiment of the invention, the second Pair of support arms the new second winding tube on the Path between the removal position and the recording position fed. However, it is also within the scope of the invention that the new second winding tube to the second pair of Admission arms is fed only in the acquisition position.

According to a very preferred embodiment of the Invention is of particular importance, that of second pair of support arms received new second First winding sleeve from the receiving position into one the waiting position arranged the winding position moves. The In this way, the new second winding tube is also from the receiving device of the cross separating device or supported and also the cross cutting device is about its pivot axis from the shooting position in the Waiting position swiveled. - Preferably the angular distance α of the first pair of support arms with the Foil wrap in the wrap position to the second pair of Support arms with the new second winding tube in the Waiting position minimized and expediently in Depends on the diameter of the film roll. The Distance of the first pair of support arms in the winding position to the second pair of support arms in the The waiting position is expediently set such that the angular distance α <80 °, preferably <70 °, very preferred Is <60 °.

The second pair of pick-up arms with the pick-up The new second winding tube is then from the Waiting position moved to the winding position, the new second winding tube also continues from the receiving device the cross cutting device is supported and the cross separator accordingly about its swivel axis from the waiting position to the Winding position is pivoted. It is within the scope the invention that the first pair of receiving arms with the film roll is moved in the direction of the removal position and simultaneously, preferably synchronously, the second pair of Holding arms with the new second winding tube in the Winding position is pivoted, then the new second Winding sleeve is pivoted to the only contact roller. Swinging onto the contact roller means in this Connection does not necessarily mean that the winding tube has a has direct contact with the contact roller. Rather is according to a preferred embodiment between the pivoted Winding sleeve and the contact roller the incoming Foil sheet arranged. Before cross cutting the film web is the second pair of support arms with the new second winding tube in the winding position with the winding tube pivoted onto the contact roller. The new second winding tube is expediently after as before from the receiving device of the cross cutting device recorded or supported. Before the cross separation is the first pair of support arms with the film roll in one of the winding positions in Direction of rotation of the transfer arms downstream transition position. Preferably, the angular distance between the first pair of support arms in the transition position and the second pair of take-up arms in the winding position minimized and expediently in Dependence on the diameter of that of the first pair of Pick-up arms of wrapped film. The angular distance is preferably <80 °, preferably <70 °, very preferably <60 °.

When the new second winding tube is in the winding position is located on the contact roller, the Foil web or plastic film web with the help of Cross separator cross-separated. After very preferred The cross-cutting device is an embodiment of the invention after transverse separation of the film web by swiveling the assigned swivel axis to a rest position transferred. If there is another new winding tube from the receiving device of the cross cutting device is to be included, the cross cutting device again by swiveling around its swivel axis in the Recording position moved.

According to a very preferred embodiment of the invention a winding tube for winding the film web rotating driven. It is therefore within the scope of the invention that a winding tube arranged in the winding position for Production of a film roll is driven in rotation. The single contact roller is preferably not rotating driven. Basically, it is also within the scope of Invention that the contact roller is driven in rotation while the winding tubes are not in the winding position are driven.

The invention also relates to a winding device according to claim 7. A preferred embodiment of the The winding device is characterized in that the Receiving device of the cross separator from two End of the winding tube assigned to a winding tube to be accommodated There are reception forks and that the reception forks each take-up rolls for the winding tube ends to be picked up exhibit. Each receiving fork preferably has three recording roles for the to be recorded Ends of the winding tube. - The cross cutting device points further expediently one for cross-separation into the Swiveling cleaver on film web. The cleaver can preferably be toothed. - To An embodiment of the invention has the receiving device the cross cutting device a the winding tube partially surrounding guide shell on which guide shell for Guidance of an air flow is provided, which on a Start of the film web for winding on a winding tube acts.

The invention is based on the knowledge that inventive method a simple and little offers an elaborate possibility when winding contacts reliable and, above all, quick changing of the winding tube bring about. Because of the procedure according to the invention and due to the winding device according to the invention is for contact winding and when changing the winding tube in the winding position only one contact roller required. This leads to an inventive Winding device compared to known winding devices is much less complex. The invention Method and the winding device according to the invention are also characterized by a very simple control. The invention is based primarily on the knowledge that through participation of the cross cutting device in the tour a new winding tube very short change times for the Winding tube change can be realized in the winding position can.

Fig. 1

eine Wickelvorrichtung zur Durchführung des erfindungsgemäßen Verfahrens in einem ersten Arbeitszustand,

Fig. 2

den Gegenstand nach Fig. 1 in einem zweiten Arbeitszustand,

Fig. 3

den Gegenstand nach Fig. 1 in einem dritten Arbeitszustand,

Fig. 4

den Gegenstand gemäß Fig. 1 in einem vierten Arbeitszustand,

Fig. 5

den Ausschnitt A aus der Fig. 4 in vergrößertem Maßstab und

Fig. 6

den Gegenstand nach Fig. 1 in einem fünften Arbeitszustand.

The invention is explained in more detail below on the basis of a drawing which represents only one exemplary embodiment. In a schematic representation:

Fig. 1

a winding device for performing the method according to the invention in a first working state,

Fig. 2

1 in a second working state,

Fig. 3

1 in a third working state,

Fig. 4

1 in a fourth working state,

Fig. 5

the section A from FIG. 4 on an enlarged scale and

Fig. 6

1 in a fifth working state.

The figures show a winding device for implementation a method for winding up an incoming Film web 1 on a winding tube 2, 3. In the film web 1 is preferably and in the embodiment around a plastic film web. A first winding tube 2 is of a first pair of about a central axis 4 pivotable receiving arms 5 added. In Figures 1 to 3 it can be seen that this first pair of Support arms 5 with the first winding tube 2 in one Winding position WI is in which a film roll 6 with the incoming film web 1 is wound up. At the A contact roller 7 is wound up with the film winding 6 kept in touch. According to a very preferred embodiment and in the embodiment, the winding tube 2 in the Winding position WI for winding the film web 1 driven in rotation while the contact roller 7 is not is driven in rotation.

In the figures there is also a second pair of around the Central axis 4 pivotable support arms 8 recognizable. During the winding of the film roll 6 in the These second holding arms 8 are in the winding position WI initially arranged in a basic position G (FIG. 1). The second support arms 8 already have a new second one Winding sleeve 3 added, expediently on their path between the removal position E and the basic position G. The second pick-up arms 8 are then then pivoted into the receiving position A. This is in Fig. 1 has been indicated by an arrow. - In the Figures is by the way of the two pairs of Support arms 5, 8 each only in the side view front receiving arm 5, 8 shown. It goes without saying that behind each front mounting arm 5, 8 is another holding arm 5, 8 arranged with a spacing between the winding sleeves is provided. The receiving arms 5, 8 are for receiving the End sleeves 11 set up.

When the new second winding tube 3 is in the receiving position A (Fig. 2) is this new second Winding sleeve 3 from the receiving device 9 of the cross cutting device 10 recorded and as it were from below supported. The receiving device 9 of the cross cutting device 10 is preferably and in the embodiment from two the winding tube ends 11 one to be accommodated winding sleeve 2, 3 and with Wrapping sleeve spacing arranged forks 12. In the Figures is only the front in the side view Pickup fork 12 has been shown. The forks 12 expediently and in the exemplary embodiment, take-up rollers 13 for the winding tube ends 11 on. Each is preferred and in the exemplary embodiment Pickup fork 12 equipped with three pickup rollers 13. The cross cutting device 10 is about a pivot axis 14 pivotable. Incidentally, the cross cutting device 10 preferably and in the exemplary embodiment by means of a Actuates cylinder 15, the cross-separator 10th or the receiving device 9 to the second winding sleeve 3 presses. The cross cutting device 10 thus supports the second winding tube 3 further on in the winding position WI.

The second pair of pick-up arms 8 is picked up with the one new second winding tube 3 initially to a waiting position W and from there to the Winding position WI swiveled. At the same time, the Cross cutting device 10 by pivoting about the pivot axis 14 from the receiving position A to the waiting position W and from there moved into the winding position WI. On the the new second winding tube 3 from the receiving device 9 of the transverse separating device 10 recorded and supported (Fig. 3 and 4). The radial Distance of the new winding tube 3 from the central axis 4 remains on its way from shooting position A to WI constant winding position. This is preferably and in Embodiment when pivoting the cross separator 10 the radial distance of the receiving device 9 to the Pivot axis 14 changed. The receiving device 9 is expediently and in the exemplary embodiment in the direction the pivot axis 14 retractable. This is by an arrow has been hinted at.

When the new second winding tube 3 is in the waiting position W is the first winding tube 2 with the Foil winding 6 arranged in the winding position WI. The Angular distance α of the first pair of support arms 5 in the winding position WI to the second pair of receiving arms 8 in the waiting position W becomes according to the diameter the film roll 6 minimized as possible. - Then the first pair of holding arms 5 in Direction of the removal position E moves and at the same time, the second pair of Pick-up arms 8 from the waiting position W in the Transfer position WI transferred. Both pairs of support arms 5, 8 are at the maximum possible angular velocity emotional.

The new second winding tube 3 is in the winding position WI pivoted to the contact roller 7 (Fig. 4). It is between the new second winding tube 3 and the Contact roller 7 which continues to feed the film roll 6 Foil sheet 1 arranged. The first pair of support arms 5 is now with the first winding tube 2 and film roll 6 arranged thereon in a transition position Ü (Fig. 4). The new second winding tube 3 is continue from the receiving device 9 of the cross separator 10 recorded and supported. in the This is followed by the transverse separation of the film web 1. For this purpose, the transverse separating device 10 in the exemplary embodiment a chopping knife which can be swiveled into the film web 1 16 on. The swiveling of this cleaver 16 was in the Fig. 5 indicated by an arrow. According to preferred Embodiment and in the embodiment shows the Receiving device 9 of the transverse separating device 10 in the The other one partially surrounding the winding tube 3 Leitschale 17 on (Fig. 5). This guide shell is used for Guiding an injected airflow 18, which on the the new web start of the film web 1 acts, so that this web start of the film web 1 puts around the second winding tube 3 and is wound. A Leitschale 17 is not absolutely necessary. It is also within the scope of the invention, the winding tube 3 with to provide an adhesive material so that the Cross separation formed new web start of the film web 1 adheres to the new second winding tube 3 and wound becomes.

After the cross separation, the first pair of moves Support arms 5 the finished film roll 6 in the Removal position E, in which the film roll 6 together with the first winding tube 2 is removed. Meanwhile, on the second winding tube 3 is a new film winding 6 wound up, the contact roller 7 with this Foil wrap 6 is kept in contact. The first pair of The receiving arms 5 is then removed from the removal position E preferably first in the basic position G and from there moved back to the receiving position A. Conveniently, is the first pair of receiving arms 5 before reaching the Receiving position A fed a new winding tube 2, 3. Then the cycle described above begins again.

Claims (10)

Method for winding an incoming film web (1), in particular a plastic film web onto a winding tube (2, 3), A film roll (6) is wound onto a first winding tube (2), which is received between a first pair of receiving arms (5) pivotable about a central axis (4), and a contact roller (7) is wound up during winding. is kept in contact with the film roll (6), wherein a second pair of receiving arms (8) pivotable about the central axis (4) is pivoted into a receiving position (A) during the winding of the film roll (6) in the winding position (WI), wherein the second pair of receiving arms (8) receives a new second winding tube (3) and wherein the new second winding tube (3) is received in the receiving position (A) by the receiving device (9) of a cross-cutting device (10), the first pair of receiving arms (5) with the film roll (6) wound on the first winding tube (2) is then moved in the direction of a removal position (E) and at the same time that of the second pair of receiving arms (8) and in the receiving device (9) the new second winding tube (3) received by the cross cutting device (10) is pivoted together with the cross cutting device (10) into the winding position (WI) and the new second winding tube (3) is thereby pivoted onto the single contact roller (7), wherein the transverse separation of the film web (1) is carried out with the transverse separation device (10) and a new beginning of the web that is created is wound onto the new second winding tube (3), the finished film roll (6) with the first winding tube (2) in the removal position is then removed from the first pair of receiving arms (5), and the first pair of pick-up arms (5) then being returned to the pick-up position (A), and so on. The method of claim 1, wherein the radial distance a new winding tube (3) from the central axis (4) their way from the take-up position (A) to the winding position (WI) is kept constant. The method of claim 2, wherein the cross separator (10) during the movement of the new winding tube (3) from the take-up position (A) to the winding position (WI) a pivot axis (14) is pivoted and the radial distance of the receiving device (9) to the Swivel axis (14) is changed. Method according to one of claims 1 to 3, wherein the new ones picked up by the second pair of pickup arms (8) second winding tube (3) from the receiving position (A) first in a position in front of the winding position (WI) Waiting position (W) is moved. Method according to one of claims 1 to 4, wherein the Cross separation device (10) after a cross separation of the Film web (1) by swiveling around the assigned one Swivel axis (14) is transferred to a rest position. Method according to one of claims 1 to 5, wherein a Winding tube (2, 3) for winding the film web (1) is driven in rotation. Winding device for carrying out the method according to one of claims 1 to 6, A first pair of receiving arms (5) for receiving a first winding tube (2) and a second pair of receiving arms (8) for receiving a second winding tube (3) are provided, the receiving arms (5, 8) about the same central axis ( 4) can be swiveled independently of one another in pairs, Furthermore, only a single contact roller (7) for contact winding taking place in a winding position of the receiving arms (5, 8) alternately onto a winding tube (2) received between the first pair of receiving arms and onto a winding tube (3) received between the second pair of receiving arms, is provided, and a transverse separating device (10) with a receiving device (9) for a winding tube (2, 3) is also present, which transverse separating device (10) for transferring a winding tube (2, 3) from a receiving position (A) into the winding position (WI) is pivotable about a pivot axis (14). Winding device according to claim 7, after which the receiving device (9) the cross separator (10) from two End of the winding tube (11) of a winding tube (2, 3) assigned receiving forks (12) and the Pick-up forks (12) each take-up rollers (13) for the have winding sleeve ends (11) to be received. Winding device according to one of claims 7 or 8, wherein the cross separator (10) is used for cross separation in the clipping knife (16) which can be swung in (1) having. Winding device according to one of claims 7 to 9, wherein the receiving device (9) of the cross cutting device (10) a guide shell partially surrounding the winding tube (2, 3) (17), which guide shell (17) for guidance an air flow (18) is provided which is directed to a Web start of the film web (1) for winding on a Acts on the winding tube (2, 3).

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