EP3536643A1 - Turret coiling machine with electrostatic fixing of the beginning of the web - Google Patents

Abstract

Reversible winding machine with electrostatic fixation comprising: • a winding core carrier with side parts which have holding devices for rotatably supporting a winding core at different circumferential positions, • a drive device coupled to the winding core carrier in order to shift one winding core into a winding position and at the same time another winding core into a winding position, • Pressure rollers, one of which can be moved to the winding core in the winding position and the other to the winding core in winding position, • a cutting device, with a cutting knife to cut through the pressure roller on the side facing the winding core in the winding position to the winding material, • an electrical high-voltage source • an associated device for transferring electrical charges to the web material between the pressure roller and the displacement path of the cutting knife, • an electrical control device Seal that is designed to apply an electrical voltage to the device for transferring during winding to compensate for charges present on the web material and to feed a charge to fix the beginning of the web on the winding core when severing the web.

Description

The invention relates to a turning winding machine for winding a substantially insulating web material with electrostatic fixing of the web beginning on a winding core.

In particular, web materials are wound into rolls directly after their production, their separation into narrower webs, their printing or their further processing into bags, sacks or other packaging materials. For this purpose, in particular spiral winding machines are used. These have a rotatable winding core carrier on which a plurality of winding cores are rotatably mounted. The winding cores are displaced by rotating the winding core carrier successively in a Anwickelposition for wrapping a web start and in a winding position for further winding of the web material. When the roll is fully wound in the winding position, the web material between the winding position and winding position is severed by means of a cutting knife and the subsequent web start wound on the winding core in the Anwickelposition. When Anwickeln the fully wound roll is removed from the hub carrier and replaced by a unwound hub. Thereafter, with continuous winding of the web material on the other winding core, the winding core carrier is rotated until the wound winding core has reached the winding position and the still unwound winding core is in the winding position, and the process begins again.

Conventionally be used as hubs cores (eg made of metal or cardboard) with special adhesive tapes that fix the web start on the circumference of the sleeves. Sticking the web edge limits process speed, is expensive because of the tapes, and is problematic for food web materials.

The term "adhesive-free Anwickeln" is the fixing of the web start on a winding core when winding by means of electrostatic charge referred to.

In the processing of a substantially insulating web material, in particular by locomotion, deflection, friction, stretching and use of electrostatic pressure assistants (ESA), high electrostatic charges of the web material may occur. The charges are stored in the material wound into a roll similarly as in a wound capacitor. As a result, during processing of the web material, flashovers can occur which endanger workers. Therefore, means for unloading the continuous web material are known.

The EP 3 222 421 A1 proposes, for compensation of unwanted charges, a take-up device having means for transferring electrical charges to the web material on the take-up roll and / or deflecting onto the take-up roll connected to at least one positive or negative polarity electrical high voltage source.

Based on this, the invention has for its object to provide a turning winding machine for winding a substantially insulating web material with electrostatic fixation of the web beginning with cheaper manufacturing and operating characteristics.

The object is achieved by a turning winding machine with the features of claim 1. Advantageous embodiments of the turning winding machine are specified in subclaims.

• einen drehbar um eine Drehachse gelagerten Wickelkernträger mit zwei Seitenteilen, die in einem Abstand voneinander angeordnet sind und an den einander zugewandten Seiten in verschiedenen Umfangspositionen jeweils Halteeinrichtungen zum lösbaren Halten an den beiden Enden und drehbaren Lagern eines Wickelkernes um eine zur Drehachse parallele Wickelachse aufweisen,
• eine Antriebseinrichtung, die mit dem Wickelkernträger gekoppelt ist, um den Wickelkernträger mit den einen Halteinrichtungen und dem davon gehaltenen Wickelkern in eine Anwickelposition und gleichzeitig die anderen Halteeinrichtungen mit dem davon gehaltenen Wickelkern in eine Aufwickelposition zu verlagern,
• drehbar gelagerte Anpresswalzen, von denen eine zwischen den beiden Seitenteilen in radialer Richtung auf den Wickelkern in der Anwickelposition zu verlagerbar ist und die andere zwischen den beiden Seitenteilen in radialer Richtung auf den Wickelkern in der Aufwickelposition zu verlagerbar ist,
• eine Schneideinrichtung mit einem Schneidmesser und einer Verlagerungseinrichtung, um das Schneidmesser zwischen den beiden Seitenteilen in den Abstandsbereich zwischen der Anwickelposition und der Aufwickelposition hinein zu verlagern, um hierbei ein über die Anpresswalze neben der Anwickelposition auf der den Wickelkern in der Anwickelposition zugewandten Seite zum Wickelkern in der Aufwickelposition geführtes Bahnmaterial zu durchtrennen,
• eine Einrichtung zum Übertragen elektrischer Ladungen auf das Bahnmaterial, die zwischen der Anpresswalze, die auf den Wickelkern in der Anwickelposition zu verlagerbar ist, und dem Verlagerungsweg des Schneidmessers beim Auftrennen des Bahnmaterials angeordnet ist,
• mindestens eine elektrische Hochspannungsquelle, die mit der Einrichtung zum Übertragen elektrischer Ladung verbunden ist und
• eine elektrische Steuerungseinrichtung, die ausgebildet ist, beim Aufwickeln des Bahnmaterials auf den Wickelkern an die Einrichtung zum Übertragen elektrischer Ladungen mindestens eine elektrische Spannung mit einer Höhe und/oder Polarität anzulegen, die zur Kompensation auf dem Bahnmaterial vorhandener Ladungen geeignet ist, und beim Durchtrennen des Bahnmaterials an die Einrichtung zum Übertragen elektrischer Ladungen mindestens eine elektrische Spannung mit einer Höhe und/oder Polarität anzulegen, die geeignet ist, dem auf das abgetrennte Bahnende nachfolgenden Bahnanfang eine Ladung zum Fixieren des Bahnanfanges auf dem Wickelkern in der Anwickelposition zuzuführen.

The turn winding machine according to the invention for winding up a substantially insulating web material with electrostatic fixing of the web start on a winding core comprises:

• a winding core carrier rotatably mounted about an axis of rotation and having two side parts which are arranged at a distance from one another and have holding devices for releasably holding at the two ends and rotatable bearings of a winding core about a winding axis parallel to the axis of rotation on the facing sides in different circumferential positions,
• drive means coupled to the winding core carrier to shift the winding core carrier with the one holding means and the winding core held thereon to a winding position and at the same time the other holding means with the winding core held thereby to a winding position;
• rotatably mounted pressure rollers, one of which is displaceable between the two side parts in the radial direction on the winding core in the Anwickelposition and the other between the two side parts in the radial direction to the winding core in the winding position to be displaced,
• a cutting device with a cutting blade and a displacement device to shift the cutting blade between the two side parts in the distance range between the Anwickelposition and the winding position in order to do this via the pressure roller next to the Anwickelposition on the winding core in the Anwickelposition facing side to cut to the winding core in the winding position guided web material,
• a device for transferring electrical charges to the web material, which is arranged between the pressure roller, which is displaceable on the winding core in the Anwickelposition, and the displacement path of the cutting blade in the separation of the web material,
• at least one high voltage electrical source connected to the electrical charge transfer device, and
• an electrical control device, which is designed to apply at least one electrical voltage with a height and / or polarity, which is suitable for compensating for charges present on the web material, during winding of the web material onto the winding core, to the device for transferring electrical charges Web material to the means for transmitting electrical charges to apply at least one electrical voltage with a height and / or polarity, which is adapted to supply the beginning of the severed tail end of the web a charge for fixing the web start on the winding core in the Anwickelposition.

In the turn winding machine according to the invention is applied with the same means for transferring electrical charges on the web start charge for fixing on the winding core in the Anwickelposition and applied to the same winding core to charge the charge in the production or processing of the web material required charge on the web material on further winding , This is done by arranging the means for transmitting electrical charges between the pressure roller, which is to be displaced on the winding core in the Anwickelposition, and reaches the displacement path of the cutting blade in the separation of the web material. Because of this arrangement, both unwanted loading of the web material before being wound onto the winding core in the winding position can be compensated for, and after the web material has been severed, the subsequent web start can be provided with a suitable charge for fixing on the winding core in the winding position. By means of the electrical control device, the charging of the web beginning can be controlled prior to fixing so that despite a charging of the web material in its production or further processing, a sufficient fixation on the winding core is achieved. The fact that the device for transmitting electrical charges both takes care of fixing the web start and the compensation of electrical charges of the web material, components are saved and reduced space requirements. As a result, the cost of production and operation can be reduced.

According to one embodiment of the invention, the electrical high voltage source supplies high voltages of different polarity. The electrical controller controls which of the high voltage electrical voltages of different polarity are applied to the electrical charge transfer device. In the embodiment of the device for transmitting electrical charges as a needle electrode can be applied to compensate for different rows of needles a high voltage of different polarity or to a row of needles of a high voltage of certain polarity and to another row of pins mass. In the case of a needle electrode with only a single row of needles, it is possible to apply to this row of needles a high voltage of a certain polarity and that to the housing ground. To load the web beginning for the fixation on the winding core A high voltage of the same polarity can be applied to one or two rows of needles of a needle electrode.

In another embodiment, the high voltage electrical power source provides at least one adjustable high voltage to the means for transferring electrical charges to the web material. By adjusting the high voltage, it is possible to optimize the charge applied to the web material to compensate for charging of the web material. Furthermore, the charge supplied to the web start for fixing the web material to the winding core can be optimized.

According to a further embodiment, the electrical control device is designed such that it applies to the means for transmitting electrical charges at least one electrical voltage with a height and / or polarity which causes a charging of the web beginning, which depends on the charging of the supplied web material. Here, the height and / or polarity of the charge for fixing the web start on the winding core can be adjusted depending on the height and / or polarity of the charge to compensate for the charging of the web material, e.g. according to a table based on empirical values.

According to a further embodiment, at least one field strength measuring device is arranged such that it detects the web material supplied to the turning winding machine, preferably when deflecting onto the winding core or onto the winding core, wherein the field strength measuring device determines the charge having the web material and is connected to the electrical control device adapted to apply a high voltage having a magnitude and / or polarity to the means for transmitting electrical charges, which is dependent on the charging of the sheet material measured by the field strength measuring device depends. In this case, the electrical control device, taking into account the measured charge, determine the high voltage required to compensate for the charging and / or the high voltage required for charging the web start for fixing on the winding core.

According to a further embodiment, the electrical control device is designed such that when winding the web material onto the winding core, it applies to the electrical charge transfer device a high voltage having a height and / or polarity which causes minimal charging of the web material wound on the winding core. This minimizes the risk of flashovers.

According to a preferred embodiment of the invention, the means for transferring electrical charges to the web material is a charging electrode arranged so that the web material passes through the area of action of the charging electrode. Since the charging electrode can act on the web material from a distance, placement and / or displacement of the charging electrode is possible, so that it does not collide with moving parts. In addition, the arrangement of the charging electrode at a distance from the web material changes of the course of the web material can be bridged to a limited extent, for example due to the increase in the roll diameter during winding of the web material on the winding core.

According to a further embodiment, the effective range of the charging electrode is defined as the range in which the field strength of the electric field generated by the charging electrode is at least 1% of the maximum field strength of this field, preferably at least 5%, preferably at least 10%, furthermore preferably at least 20%. , preferably at least 50%.

According to a further embodiment, the charging electrode is arranged on the winding core during fixing of the web beginning so that its effective area covers the outer circumference of the winding core arranged in the winding station. This is particularly advantageous for fixing the web start on the winding core.

According to a further embodiment, the charging electrode is arranged next to the pressure roller to be displaced on the winding core in the Anwickelstation on the same side of the web material as this pressure roller. According to a further embodiment, the charging electrode is directed on the outer circumference of the winding core in the Anwickelstation when fixing the web start on the winding core with its effective range through the web material.

According to a further embodiment, the charging electrode is aligned with its effective range tangentially to be applied to the winding core in the Anwickelstation to be displaced pressure roller. According to a further embodiment, the charging electrode is aligned radially to the winding core in the Anwickelstationen when cutting the web material.

According to another embodiment, the charging electrode is a bar-shaped charging electrode. According to another embodiment, the charging electrode is a needle electrode. The charging electrode is preferably formed as a charging electrode used for top loading of impression rollers in electrostatic printing assistants (ESA). According to a preferred embodiment, the charging electrode is a bar-shaped needle electrode which is formed as shown in FIG EP 1 640 160 B1 described, in particular as the needle electrode according to Fig. 1 to 10 or 11 to 14 of this patent. In this regard, the content of the above patent is hereby incorporated by reference. According to one In another embodiment, the needle electrode has two parallel rows of needles. This is advantageous for neutralizing the charging of the sheet material by applying a positive high voltage to one row of pins and applying a negative high voltage to the other row of pins or applying a positive or negative high voltage to one row of pins and applying ground to the other row of pins. To load the web beginning equal voltages can be applied to both rows of needles.

In the case of a needle electrode, the area of action is aligned axially in the direction of the needles. The sphere of action is characterized by the course of the field lines. These are lines of constant field strength. In a needle electrode, the course of the field lines is elliptical, with the major axes of the ellipses in the direction of the needles and the minor axes aligned perpendicular thereto.

According to a further embodiment, the cutting device is designed such that the displacement path of the cutting blade when separating the web material between the winding core in the Anwickelposition and the axis of rotation of the winding core carrier extends. Preferably, the displacement path of the cutting blade extends at a distance from the winding core in the Anwickelposition, which is less than half the distance of this winding core from the axis of rotation of the winding core carrier. As a result, the web material is separated at a short distance from the winding core in the Anwickelposition, so that the subsequent web start is wrapped around the winding core in the Anwickelposition. The laying around and fixing is achieved by the electrical charge of the web start and possibly the winding core.

According to a further embodiment, the device for transferring electrical charges and the pressure roller arranged next to the winding position are fastened to the same support structure. This is advantageous for a positioning of the device for transmitting electrical charges, so that the web start is securely fixed on the winding core in the Anwickelposition.

According to a further embodiment, the support structure is displaceable by means of a feed device into the region between the side parts and out of this region. By shifting the support structure out of the area between the two side parts, rotation of the winding core carrier is made possible without colliding with the support structure and the components attached thereto. According to a further embodiment, the electrical control device is connected to the feed device and designed so that the support structure with the pressure roller mounted thereon is displaced out of the area between the two side parts after the start of the web and after the winding core has been wound on which the web material is wound is shifted, from the Anwickelposition to the winding position, in the position next to the wound in the Anwickelposition, unwound winding core. If the support structure is displaced out of the region between the two side parts, the web material continues to run on the winding roller mounted thereon on the winding core in the Anwickelposition. At this time, the sheet material is further guided past the electrical charge transfer device fixed to the support structure. As a result, charges of the web material are compensated even if the support structure is displaced out of the area between the side parts. Even if the reel hub rotates the reel from the coiling position to the reeling position, the web is passed by the device for transferring electrical charges, so that the charging compensation can be continued. After the winding core carrier the winding core has rotated from the Anwickelposition in the winding position, the support structure is displaced with the pressure roller between the side parts next to the still unwound winding core in the Anwickelposition. Here, the means for transferring electrical charges remains in the vicinity of the continuous web material, so that it can continue to compensate for charges thereof. During the subsequent separation of the web material, a high voltage for fixing the web start to the winding core in the winding position is transmitted to the device for transferring electrical charges.

According to a further embodiment, the turning winding machine comprises a blowing device, which has at least one air outlet opening, which is directed to the web material between the pressure roller, which is to be displaced on the winding core in the Anwickelposition and the displacement path of the cutting blade in the separation of the web material and to a compressed air source connectable or connected. The blowing device supports the application and fixing of the web beginning at the arranged in the Anwickelposition winding core. According to a further embodiment, the blowing device is bar-shaped with a compressed air channel which is connectable or connected to a compressed air source, and at least one air outlet opening, preferably at least one row of air outlet openings, on one side, each air outlet opening is connected to the compressed air channel. The beam-shaped blowing device is aligned with the at least one air outlet hole on the web material and preferably perpendicular to the running direction of the web material.

According to a further embodiment, the blowing device is integrated into or attached to the device for transmitting electrical charges. According to a further embodiment, the device for transferring electrical charges with integrated blowing device is a needle electrode with one or two rows of needles, having a compressed air channel and a number of air outlet openings which are connected to the compressed air channel. This is a particularly space-saving design. According to a further embodiment, the air outlet openings are arranged between two rows of needles. According to a further embodiment of a needle electrode with one or two rows of needles, the compressed air channel is connected to a connecting piece for compressed air which protrudes from one end of the needle electrode.

According to a further embodiment, the device for transmitting electrical charges is a bar-shaped needle electrode with one or two rows of needles, and the blowing device is a bar-shaped blowing device mounted laterally on the bar-shaped needle electrode and having a compressed-air channel and at least one air outlet opening connected thereto as described above.

According to a further embodiment, the blowing device is connected to a switchable valve (switching valve), which is connected or connectable to the compressed air source. Via the switchable valve, the blowing device can be connected to the compressed air source during the separation of the web material in order to assist the winding. Upon further winding, the blowing device can be separated from the compressed air source via the switchable valve. According to a further embodiment, the switchable valve is connected to a compressed air channel of the blowing device, which in turn is connected to the at least one air outlet opening.

According to a further embodiment, the electrical control device is connected to the switchable valve and designed to open the switchable valve when severing the web material, so that compressed air through the at least an air outlet opening of the blowing device exits, which moves the web start to the winding core in the Anwickelposition. According to another embodiment, the electrical control device simultaneously applies the electrical high voltage for fixing the web start to the device for transferring electrical charges and switches on the switchable valve, which connects the blowing device to the compressed air source. According to a further embodiment, the electrical control device is designed to close the switchable valve after winding the web start to the winding core in the Anwickelposition. According to a further embodiment, the electrical control device switches off the high voltage for fixing the web start and the blowing device simultaneously. But it is also possible to perform the switching on of the high voltage for fixing and switching on the blowing device and / or switching off the high voltage for fixing and switching off the blowing device with a time delay.

According to a further embodiment, the cutting device is designed so that the cutting blade in the starting position, before it passes through the path for separating the web material, is arranged on the same side of the web material as the device for transferring electrical charges. This makes it possible to bring the cutting device with the cutting blade from the same side of the web material as the means for transmitting electrical charges. This is advantageous for a space-saving design. According to a further embodiment, the cutting device comprises a displacement device, which is designed to displace the cutting blade in a direction cutting the web material in order to sever the web material. According to a further embodiment, the displacement device is designed to displace the cutting blade out of the region between the two side parts and into the region between the two side parts. When the cutting knife is shifted out of the area between the side parts, it does not hinder the rotation of the hub carrier. To cut through the web material, the cutting blade is displaced into the region between the side parts. According to a preferred embodiment, the displacement device is a separate device from the delivery device.

According to a preferred embodiment, the cutting blade has a cutting edge which extends over the entire width of the web material. As a result, the strip material is separated in a straight line and wound evenly on the winding core.

According to a further embodiment, the side parts of the winding core carrier are disks, in particular circular disks. According to a further embodiment, the side parts each have radially with respect to the axis of rotation projecting support arms on which the holding devices are arranged. Free spaces are preferably present between the support arms. The side parts can be formed solely by the support arms.

According to a further embodiment, the electrical control device is designed so that during the separation of the web material by means of the cutting device and / or a defined period of time before cutting the web material by means of the cutting device of the device for transmitting electrical charge no electrical high voltage to compensate for a charge of the web material supplies more and instead of the means for transmitting electrical charge, a high electrical voltage for fixing the web start to the winding core in the Anwickelposition supplies. This ensures that the web start charges are supplied for fixing on the winding core in the Anwickelposition. When the charges for fixing the sheet material are fed before cutting through the cutting blade, is also supplied to the leading tail end charges, the amount of which, however, is so low that it does not cause the workers at risk of voltage flashovers from the role. In addition, these charges can fix the tail of the finished roll. The period of time during which the corresponding charges are fed before the web material is severed can be determined as a function of the throughput speed, the charges required to fix the web start at the winding core in the winding position and the charges which can be fed to the web end without danger of flashovers threatening the operator become.

According to a further embodiment, the electrical control device is designed such that it supplies to the web material the electrical high voltage for fixing the web start on the winding core in the winding position over a certain period of time. This period of time is preferably chosen so that it suffices for the secure fixing of the web material to the winding core and the charges fed to the roll in this case do not cause the flashovers endangering the work personnel.

The substantially insulating web materials are, in particular, plastic foils or composite foils containing plastic or sheet materials produced from plastic foils or composite foils. Composite films may contain the plastic, for example, in the form of a plastic film, an extruded layer or applied plastic films. In addition, they include, for example, a metal foil, a paper web, a board web or another plastic film. In addition, the composite film may comprise any of the aforementioned components in combination. The web material may in particular be a printing material. The web material can in particular be printed in a printing substrate. This may in particular be a packaging material.

According to a further embodiment, the turning winding machine is part of a rotary printing machine or a web-fed printing machine. According to another embodiment, it is a gravure printing machine, flexographic printing press, offset printing press, high-pressure machine, planographic printing machine or screen printing machine.

According to another embodiment, the turn winding machine is part of a slitter-winder.

According to another embodiment, the turn winding machine is part of a film extrusion machine.

According to a further embodiment, the turning winding machine is part of a laminating machine.

Furthermore, the turn winding machine according to the invention can be used in other applications in which web material is wound from electrically substantially insulating material to form a roll.

• einen Wickelkernträger mit Seitenteilen, die an verschiedenen Umfangspositionen Halteeinrichtungen zum drehbaren Lagern eines Wickelkernes aufweisen,
• eine mit dem Wickelkernträger gekoppelte Antriebseinrichtung, um einen Wickelkern in eine Anwickelposition und gleichzeitig einen anderen Wickelkern in eine Aufwickelposition zu verlagern,
• Anpresswalzen, von denen eine auf den Wickelkern in Anwickelposition und die andere auf den Wickelkern in Aufwickelposition zu verlagerbar ist,
• eine Schneideinrichtung, um mit einem Schneidmesser ein über die Anpresswalze auf der dem Wickelkern in der Anwickelposition zugewandten Seite zum Wickelkern geführtes Bahnmaterial zu durchtrennen,
• eine elektrische Hochspannungsquelle
• eine damit verbundene Einrichtung zum Übertragen elektrischer Ladungen auf das Bahnmaterial zwischen der Anpresswalze und dem Verlagerungsweg des Schneidmessers,
• eine elektrische Steuerungseinrichtung, die ausgebildet ist, um an die Einrichtung zum Übertragen beim Aufwickeln eine elektrische Spannung zur Kompensation auf dem Bahnmaterial vorhandener Ladungen anzulegen und beim Durchtrennen dem Bahnanfang eine Ladung zum Fixieren des Bahnanfanges auf dem Wickelkern zuzuführen.

Furthermore, the object is achieved by a turn winding machine for winding a substantially insulating web material with electrostatic fixation of the web start on a winding core with the following features:

• a winding core carrier with side parts which have holding devices for rotatably supporting a winding core at different circumferential positions,
• a drive means coupled to the winding core carrier for shifting a winding core into a winding position and at the same time another winding core to a winding-up position,
• Press rollers, one of which can be displaced on the winding core in the winding position and the other on the winding core in the winding position,
• a cutting device for severing with the cutting blade a web material guided over the pressure roller on the side facing the winding core in the winding position to the winding core,
• an electrical high voltage source
• associated means for transferring electrical charges to the web material between the nip roll and the displacement path of the cutting blade,
• an electrical control device which is designed to apply to the means for transferring during winding an electrical voltage for compensation on the web material of existing charges and to feed the web beginning a charge for fixing the web start on the winding core during cutting.

Embodiments of the turn winding machine are given in the subclaims and in the above description.

Fig. 1

Wendewickelmaschine in einem Teilschnitt;

Fig. 2

vergrößertes Detail von Fig. 1.

Hereinafter, an embodiment of the invention will be explained with reference to the accompanying drawings. In the drawings show:

Fig. 1

Reversible winding machine in a partial section;

Fig. 2

enlarged detail of Fig. 1 ,

According to Fig. 1 and 2 For example, a turning winding machine 1 has a winding core carrier 2 with two circular disk-shaped side parts 3, one of which is shown. The two side parts 3 are arranged at a distance from one another parallel to one another and with their center on the same axis of rotation 4.

On the mutually facing sides, the side parts 3 holding means 5, 6 for releasably holding and rotatable bearings of winding cores 7, 8.

The holding devices 5, 6 are pins, e.g. with cylindrical shape. The hubs 7, 8 are sleeves, in the ends of the pins 5, 6 can be used. The sleeves and the pins have tongue and groove connection 9, 10, 11, 12.

The holding devices 5, 6 are each coupled to a winding drive device in order to set the winding cores 7, 8 about winding axes in rotation, which are parallel to the axis of rotation 4.

In the Fig. 1 On the left side of the axis of rotation 4 arranged holding devices 5 are located in a Anwickelposition and on the right side of the axis of rotation 4 arranged holding devices 6 are in a winding position.

The winding core carrier 2 is coupled to a drive device 13 in order to rotate the winding core carrier 2 about its axis of rotation 4 selectively with the one holding devices 5 in the Anwickelposition at the same time with the other holding devices 6 in the winding position and vice versa. For coupling, the drive device 13 and the winding core carrier 2 at their circumferences sprockets 14, 15, which engage in one another.

In addition to the Anwickelposition a pressure roller 16 is arranged parallel to the winding core 7. The pressure roller 16 is mounted on a beam-shaped support structure 17. In the winding position shown, there is a gap between the winding core 7 arranged in the winding position and the pressure roller 16.

The support structure 17 can be moved by means of a feed device from the position shown at a distance from the winding core 7 to the winding core 7, so that it rests against this and rolls on it. The feed device is designed such that the support structure 17 with the pressure roller 16 can be pulled out of the area between the side parts 3 in order to enable the winding core carrier 2 to rotate.

In addition to the winding core 8 in the winding position, a further pressure roller 18 is arranged between the two side parts 3. The further pressure roller 18 can be delivered by means of a device 10 for delivering radially to this winding core 8 down. In this device for delivery 19 may be in particular a device which presses the further pressure roller 18 under bias against the circumference of the winding core 8.

A web material 20 is guided on the side of the winding core 7 in the Anwickelposition over the circumference of the pressure roller 16 on the winding core 8 in the winding position.

When winding on the winding core 8 in the winding position, the web material 20 can be pressed by the further pressure roller 18 against the winding core 8.

At the end of the support structure 17, there is fixed a means for transferring electric charges 21, which is a bar-shaped charging electrode formed as a needle electrode.

The effective range of the charging electrode 21 is characterized by elliptic field lines 22. The charging electrode is aligned with its area of effect so that it touches the pressure roller 16 and radially meets the winding core 7 in the Anwickelposition.

The charging electrode is electrically connected to a high voltage electric power source 23.

In the needle electrode 21, a blowing device is integrated. This comprises a directed in the longitudinal direction of the needle electrode compressed air channel, a connecting piece for compressed air at one end of the needle electrode and a number of air outlet openings on the side of the needle electrode on which it has the needles from which the field lines go out.

A cutting blade 24 of a cutting device 25 is arranged further away from the Anwickelstation in the direction of passage of the web material 20 than the Device for transferring electrical charges 21. Charging electrode and cutting blade 24 are located on the same side of the web material 20. The cutting device 25 comprises a displacement device which is designed to displace the cutting blade 24 perpendicular to the web material 20 in the region between the winding position and the winding position to cut through the web material 20.

The electric high-voltage power supply 23, the winding core carrier drive device 13, the winding drive devices, the feed roller for the pressure roller 16, and the charging electrode 21 and the displacement device of the cutter 25 are connected to an electric control device 26.

When winding the web material 20 on the winding core 8 in the winding position to a roller 27 controls the electrical control device 26, the drives so that the movable components, the position of Fig. 1 accept. The high-voltage electrical supply 23 controls it so that the charging electrode 21 compensates for charging of the web material 20 by a preceding production and / or processing process. This avoids that charges are stored in the roll 27 on the winding core 8.

When the roll 27 is fully wound, the controller 26 controls the cutter 25 so that the cutting blade 24 severes the web material 20. For a certain period of time before or simultaneously with the cutting, the control device 26 controls the high-voltage supply 23 such that the charging electrode 21 no longer compensates for the charging of the web material 20. Instead, the applied high voltage generates an electric field, which is the beginning of the web behind the cut on the winding core 7 in the Anwickelposition fixed. At the same time, the pressure roller 16 can be pressed from the outside against the winding core 7. In addition, the control device 26 connects the blowing device with a high-pressure source via a switchable valve, so that the web start is additionally pressed against the winding core 7 by the compressed air emerging from the air outlet openings. As a result, the web start is wound on the winding core 7.

After being wound, the supporting structure 17 is displaced out of the area between the side parts 3 by means of the feed device. Furthermore, the cutting blade 24 is displaced out of the region between the two side parts 3 by means of the displacement device. The web material 20 is further guided over the pressure roller 16 on the winding core 7 and wound up. In this case, the web material 20 continues to pass the charging electrode 21. As a result, charging of the web material 20 can be further compensated by the charging electrode 21.

After the replacement of the roller 27 by an empty winding core 8, the winding core carrier 2 is rotated by means of the drive device 13, so that the unwound winding core 2 enters the winding position and the partially wound winding core 7 reaches the winding position. In this case, further web material 20 is continuously wound onto the winding core 7. After the winding core carrier 2 has been rotated, the pressure roller 16 and the charging electrode 21 are displaced by means of the feed device, and the cutting blade 24 is again displaced into the area between the side parts 3 by means of the displacement device. Then they take the in FIG. 1 and 2 shown position adjacent to the Anwickelposition, which is occupied by the unwound winding core 8.

Claims (20)

Turning winding machine for winding a substantially insulating web material with electrostatic fixation of the web beginning on a winding core comprising: • A winding core carrier (2) rotatably mounted about an axis of rotation and having two side parts (3) spaced apart from one another and holding means (5,6) for releasably holding at both ends and rotatable on the facing sides in different circumferential positions Supporting a winding core (7, 8) about a rotation axis (4) parallel to the winding axis, • A drive device (13) which is coupled to the winding core carrier (2) to the winding core carrier (2) with the one holding means (5) and the winding core (7) held in a Anwickelposition and at the same time with the other holding means (6) to shift the winding core (8) held thereby into a winding-up position, • rotatably mounted pressure rollers (16, 18), one of which between the two side parts (3) in the radial direction on the winding core (7) in the Anwickelposition to be displaced and the other between the two side parts (3) in the radial direction on the Winding core (8) is displaceable in the winding position, • a cutting device (25) with a cutting blade (24) and a displacement device to the cutting blade (24) between the two side parts (3) in the distance range between the Anwickelposition and to shift the take-up position to thereby sever a web material (20) guided in the winding position over the nip roll (16) adjacent to the winding position on the side facing the winding core (7) in the winding position, A device for transferring electrical charges (21) onto the web material (20) which is displaceable between the pressure roller (16) which is displaceable on the winding core (7) in the winding position and the displacement path of the cutting blade (24) during separation of the Web material (20) is arranged, • at least one high voltage electrical source (23) connected to the electrical charge transfer device (21) and • an electrical control device (26), which is formed when winding the web material (20) on the winding core (7) to the device for transmitting electrical charges (21) at least one voltage with a height and / or polarity to the Compensation on the web material (20) of existing charges is suitable, and at the cutting of the web material (20) to the means for transferring electrical charges (21) to apply at least one electrical voltage with a height and / or polarity which is suitable to the severed tail end subsequent web start to deliver a charge for fixing the web start on the winding core (7) in the Anwickelposition. Reversible winding machine according to claim 1, wherein the electrical high voltage source (23) supplies high voltages of different polarity. Reversible winding machine according to claim 1 or 2, wherein the electrical high voltage source (23) supplies at least one adjustable high voltage. A turnover winding machine according to any one of claims 1 to 3, wherein the electrical control means (26) is arranged to apply to the electrical charge transfer means (21) at least one high voltage electric current, the magnitude and / or polarity of which is charged by the web material (20), which is the Wendewickelmaschine (1) is supplied. Turning winding machine according to one of claims 1 to 4, which comprises at least one field strength measuring device which is arranged so that it the web winding material (20) supplied to the turning winding machine (1), preferably when deflecting onto the winding core (7) or on the winding core (7). detected, wherein the field strength measuring device determines the charge having the web material (20), and with the electrical control device (26) is formed, which is a high voltage with a height and / or polarity to the means for transmitting electrical charges (21 ), which depends on the charging of the web material (20) measured by the field strength measuring device. A turnover winding machine according to any one of claims 1 to 5, wherein the electrical control means (26) is adapted to apply a high voltage to the means for transferring electric charges (21) while winding the web material (20) on the winding core (7) Height and / or polarity applies, which causes a minimal charge of the wound on the winding core (7) web material (20). A turnover winding machine according to any one of claims 1 to 6, wherein the means for transferring electrical charges (21) to the web material (20) is a charging electrode arranged so that the web material (20) passes through the operative area of the charging electrode (21). A turn winding machine according to claim 7, wherein the charging electrode (21) is a needle electrode, preferably a charging electrode having two rows of needles. Reversible winding machine according to one of claims 1 to 8, wherein the charging electrode (21) is aligned with the separation of the web material (20) with its effective range tangential to the pressure roller (16) adjacent to the Anwickelstation and radially to the winding core (7) in the Anwickelstation. Turning winder according to one of claims 1 to 9, wherein the cutting device (25) is formed so that the displacement path of the cutting blade (24) when separating the web material between the winding core (7) in the Anwickelposition and the axis of rotation (4) of the winding core carrier ( 2), wherein preferably the displacement path of the cutting blade (24) extends at a distance from the winding core (7) in the Anwickelposition, which is less than half the distance of this winding core (7) from the axis of rotation (4) of the winding core carrier ( 2). A turnover winding machine according to any one of claims 1 to 10, wherein the cutting means (25) is formed so that the cutting knife (24) on the same side of the sheet material (20) in the initial position before passing the path for severing the sheet material (20) ), such as the means for transferring electric charges (21). Reversible winding machine according to one of Claims 1 to 11, in which the device for transferring electrical charges (21) and the pressure roller (16) arranged next to the winding position are fastened to the same support structure (17). A turnover winding machine according to any one of claims 1 to 12, wherein the electrical control means (26) is adapted to be separated during severing of the web material (20) by the cutter (25) and / or a defined period of time prior to severing the web material (20 ) by means of the cutting device (25) of the means for transmitting electrical charges (21) no longer supplies electrical high voltage for a compensation of charging of the web material (20) and instead the means for transmitting electrical charges (21) an electrical high voltage for fixing the web start the winding core (7) in the Anwickelposition supplies. Turning winding machine according to one of claims 1 to 13, wherein the electrical control device (26) is designed so that it supplies the web material (20) the electrical high voltage for fixing the web start on the winding core (7) in the Anwickelposition over a certain period of time. Reversible winding machine according to one of claims 1 to 14, which is part of a rotary printing machine or web-fed printing machine or a slitter-winder or a film-extrusion machine or a laminating machine. Reversible winding machine according to one of claims 1 to 15, comprising a blowing device, which has at least one air outlet opening, the on the web material between the pressure roller (16), which can be fed up to the winding core (7) in the Anwickelposition, and the displacement path of the cutting blade (24) is directed and connected to a source of compressed air or connected. A turnover winding machine according to claim 16, wherein the blowing means is integrated with or mounted on the means for transferring electric charges (21). A turnover winding machine according to claim 16 or 17, wherein the blowing means is connected to a switchable valve which is connected or connectable to the compressed air source. Reversible winding machine according to claim 18, in which the electrical control device (26) is coupled to the switchable valve and is designed to open the switchable valve during the severing of the web material (20), so that compressed air exits from the blowing device, the web beginning to the winding core (7 ) moved in the Anwickelposition. Reversible winding machine according to claim 19, wherein the electrical control device (26) is designed to close the switching valve after winding the web start to the winding core (7) in the Anwickelposition, so that no compressed air exiting from the at least one air outlet opening.

Images