HK1068123B - Device for producing foil rolls - Google Patents

Description

The invention relates to a device for the manufacture of rolls of film. In particular, the device can be used to produce coreless rolls of film, i.e. rolls of film which do not have a cardboard core or similar.

The device described herein has a roller holder from which a roll of film with a rolling film track is taken up. This is an unstretched film track. The film track is rolled from this roll of film, stretched with the help of several rolls and rolled up on a winding twine. To stretch the film is rolled up at least one of the rolling coils. Furthermore, the rotation speed of the individual rolling coils can be varied so that a stretching is also achieved. A re-arrangement is made by which the films are rolled up on the winding wick of the track, so that the rolling or stretching coils can be first lifted from the storage railway and a rolling stock can be made up of the unstretched film.

In order to remove the coreless film roll from the winding, winding pins are known to have several longitudinal segments or support elements that can be moved in the radial direction.

The manufacture of coreless film rolls with the apparatus known from WO 90/06312 has the disadvantage that the winding thread must be removed manually from the machine together with the film track coiled on the winding thread, since the stretched film track must settle before the winding thread can be removed.

Other devices for the production of coreless film rolls are shown, for example, in US 6 047 916, which is considered to be the next state of the art, and in US 4 667 890.

The purpose of the invention is to further automate the production process of film rolls, in particular of pre-stretched film rolls without core.

The solution to the problem is given by the features of claim 1.

According to the invention, the device for the production of rolls of rolls has a supply station for automatically delivering the rolled film roll from the winding twine. For this purpose, the supply station includes a sliding device for moving the winding twine's support elements. The winding twine's support elements, which are preferably radially displaced in the longitudinal direction of the winding twine, are used to vary the outer diameter of the winding twine. The supply switch according to the invention moves the support elements into a vertical supply. In the supply station, the winding twine's support elements are located at a lower distance from each other. The scope of the winding twine is sometimes defined in terms of the force of the winding twine.

The automatic removal of the roll from the winding thread eliminates a previously manual operation by operators. The increase in the degree of automation of the roll machine according to the invention has led to a considerable reduction in costs.

The tool can be hydraulically and/or pneumatically operated. For example, a roughly shaped impact bar may be provided as a pusher, so that when the film roll is stripped from the winding thread, a bump is produced and, if necessary, damage to the inner parts of the sheets is avoided. Furthermore, since it is possible to place a rolling torch in front of the winding thread, it is preferable to place a rolling torch next to the winding thread.

The winding thread's support elements can be moved from a delivery order to an intake order and vice versa by springs or a spreader. In this case, the support elements in the delivery order have a smaller distance, so that the winding thread has a smaller diameter than the inner diameter of the roll of film. In contrast, the winding thread's support elements in the intake position where the film tape is wrapped on the winding thread, preferably to produce a coreless film roll, have a greater distance, so that the winding thread displaces a larger amount of air corresponding essentially to the inner diameter of the sheets. For a more automatic movement, for example, the winding thread can be moved in a more precise direction, as can be described by the hydraulic or hydraulic gear, and the hydraulic or pneumatic components are designed to be easily adjustable and adjustable.

The release device preferably has a release device. The release device relaxes the support elements so that they are automatically transferred to the delivery position. For example, springs through which the support elements are pre-tensioned into the reception position can be released. Preferably, the pre-tensioning of the reception elements is done pneumatically and/or hydraulically, so that the release device is preferably trained in such a way that it reduces pressure.

To further increase the degree of automation of the device according to the invention, it is preferable that it be fitted with a transport device. The transport device transports the winding towers from a winding to the delivery station after the preferably extended film rail has been wrapped on them. To this end, the transport device preferably has several winding towers. The winding towers fitted with the wrapped film roll are taken from the winding and passed to the transport tower or the Wickeld transport towers. Hand winding devices may be provided at the transfer station, which are connected by an automatic transfer of the winding tower followed by a rotation of the winding tower. The winding towers may also be arranged in a different direction between the winding tower and the transfer tower. The winding towers may be connected to the transfer tower or to the transfer tower by means of a winding tower. The winding towers may also be arranged in a different direction between the two winding towers of the winding tower or the transfer tower.

The winding-thorn brackets of the transport device are preferably so formed that the winding-thorns are vertically arranged in the winding-thorns brackets. In particular, the winding-thorns are suspended in the winding-thorns brackets. To this end, the winding-thorns preferably have a suitable head-shaped enlargement which can be placed on essentially U-shaped horizontal winding-thorns. The winding-thorns can be inserted or removed in the horizontal direction in such U-shaped winding-thorns brackets.

After the winding-torn's supporting elements have been relaxed in the sliding device, i.e. after the roll of film has been removed from the winding-torn, if necessary with the help of the stripping device, the winding-torn is re-split. The winding-torn's supporting elements are then moved to their reception position, where they are used in the winding-station to receive the film strip. A roll core, such as a cardboard core, can be taken into the reception core, on which the film is then wrapped.

In the preferred use of pneumatic or hydraulically movable winding-rod support elements, the pre-tensioning of the support elements in the tension station is achieved by a pressure rise in the winding-rod support elements which moves them in a radial direction.

It is also possible to form the release station and the tension station as a single station, the advantage being that the release device used to reduce the pressure can be designed in such a way that, immediately after the pressure is reduced and the film roll is stripped from the winding, the pressure can be increased again and the support elements can be brought back into the intake position.

To further increase the degree of automation, the transport device is preferably trained as an endless transport device. The transport device thus takes over the winding ropes at the transfer station together with the roll of film wrapped on the winding torch and automatically transports them to the transfer station. After the roll of film has been delivered, the winding ropes are then transported to the tension station, if necessary. From this, an automatic transport to the transfer station takes place, at which a winding torch with reception-sensitive holding elements is now transferred to the winding winding. In particular, it is advantageous to arrange the transport direction so that the winding winding winding is arranged in a circular fashion in conjunction with the winding winding winding winding. For example, a circular transport line can be arranged in a straight line between the winding winding and the transfer station, or in the case of winding winding winding, a circular transport line can be arranged in such a way that the winding winding is arranged in a straight line, so that the winding winding is arranged in a straight line.

The following is a detailed description of the invention by reference to the accompanying drawings, using a preferred embodiment.

It shows: Fig. 1 a schematic view of the device according to the invention,Fig. 2 a schematic front view of a winding-pin mount of the transport device,Fig.3 a schematic partially cut-out front view of the winding-pin mount,Fig. 4 and 5 schematic front views of the discharge station andFig. 6 a schematic front view of the tension station.

The device of the invention for the production of film rolls has a roll holder 10 according to the basic design shown in Fig. 1. The roll holder 10 supports a roll of film 12 with generally unstretched film. A roll of film 14 is rolled up from the roll of film 12 and passed through several rolls of rolls 16, 18. Usually such devices have a large number of rolls 16, 18 which are partly connected to a drive, the rotational speed of the individual rolls 16, 18 being variable. This allows a track of the roll of film 14 to be formed. In particular, one or more rolls of rolls 16 and 18 may be stamped to support the roll of film 14 to be run.

After rolling the rolls 16, 18 through, the film track 14 is rolled up onto a winding twine 20; after rolling the film track 14 over to the winding twine 20 to a predetermined length, the film track 14 is cut through by a cutting device 22, such as a knife.

In the example shown, the winding twist 20 is removed with the coiled film, i.e. the produced film roll 24, and a new twist twist 20 is inserted into the device by means of an automatic, non-represented handling device, e.g. the handling device has an arm with a gripper attached to the front end.

After removal of the winding twine 20 with film roll 26 from the device, a new winding twine 20 is inserted into the device by means of the handling device.

The handling device may be designed to carry and, if necessary, drive the winding twine 20 to the winding twine even during the winding of the film track 14 to this end, for example, the winding twine 20 has cone-shaped protrusions 22 (Fig. 4) on the two opposite front sides, which intervene into the corresponding tips. The two opposite tips can be fixed to a common arm and rotated by this. By twisting the arm, the winding twine 20 is turned from the lifting station 26 in the direction of a winding twine holder 28 to the transfer station 30.

The wickeldorn is then rotated in the direction of the arrow 34 one station further, and the wickeldorn is turned clockwise to the next position. After turning the wickeldorn, the wickeldorn is at the transfer station 30 with the wickeldorn 20 empty. Here the wickeldorn 20 is held by the tips into the conical outlets 22 and the wickeldorn is swung so that it reaches the wickeldorn station 26.

The newly installed Wickeldorn 20 is now used to wrap the next piece of film 14 which is then wrapped by the film roll 12 on which a much longer film roll is wrapped, so that a large number of film rolls 24 can be produced.

The Wickeldorn mount 28 is U-shaped in cross-section and has two opposite arms 36 running essentially parallel to each other. The Wickeldorn mount 32 is open in radial direction with respect to the plate-shaped conveyor 32 so that the Wickeldorn 20 can be removed from or inserted into the Wickeldorn mount 38 in the direction of an arrow (Fig. 3). To prevent the Wickeldorn 20 from slipping out of the Wickeldorn mount 28, at least one of the two arms 36 preferably has two wires or locking devices 40 in front of it. In the example shown, the locking devices with a 42-spring bullet are called a 44-spring bullet or a 20 Wickeldorn bullet. The force of the Wickeldorn arm 28 is applied to prevent the ball from slipping out of the Wickeldorn arm.

For each wickeldorn 20, a single wickeldorn holder 28 is provided, in which the wickeldorn 20 is suspended vertically, and the wickeldorn 20 has a disc-shaped head 44 (Fig. 4) which rests on one of the upper arms 36.

The transport device 32 (Fig. 1) has 12 winding-thorn holds 28 in the illustrated example. After nine transport steps, a film track 14 wrapped on the winding-thorn 20 at the winding-up station 26 arrives at a delivery station 46 after being handed over to the transport device 32 at the delivery station 30. During the transport of the roll 24 from the delivery station 46, the film is rested or set. This resting line or resting phase is necessary to remove the film produced as a coreless film roll 24 from the winding-thorn 20 in the illustrated example.

For the removal of film roll 24 from the winding twine 20, the discharge station 46 (Figures 4 and 5) has a sliding device 48. The discharge station 48 is used for the removal of 20 longitudinal sections of the winding twine 50. The 50 sections of the winding twine are pneumatically removable in the radial direction of the winding twine 20 in the example shown. By moving the 50 elements in a radial direction, the diameter of the winding twine 20 can be varied. For the removal of film roll 24 from the winding twine 20 and the 50 elements of the winding twine 20, respectively, the removal of the 50 elements within the winding twine 50 is carried out in the direction of a 48-pin drive. This causes the 54-pin drive to be pushed back in the direction of the winding twine 20 or 20 channels, and a ventilation valve can be used to remove the air from the winding twine 58 in the direction of the winding twine 20 or 20 channels.

The outer diameter of the winding twist 20 is smaller than the inner diameter of the film roll 24 after the air has been discharged. Since the winding twist 20 is suspended vertically in the winding twist 28 holder, the film twist 24 can now, by gravity, slide off the winding twist 20 or the winding twist 20's support elements 50 and fall onto a conveyor belt 60 (Fig. 1). The conveyor belt 60 then transports the individual film rolls 24 to a processing facility such as a packaging facility.

As the inner layers of the film roll 24 may adhere to the support elements 50 of the winding twine 20, gravity is sometimes insufficient to cause the film roll 24 not to slide off automatically after the pressure in the winding twine has been reduced, i.e. the diameter of the winding twine has been reduced. To assist the stripping of film roll 24 from the winding twine 20, an abrasive device 62 is provided. In the illustrated example, the abrasive device 62 is a stump 64 which is propelled in the direction of a pick-up line 66. The stump 64 is located next to the winding twine 20 and is arranged on a seamless surface so that this is moved in the direction of the winding twine.

During the striping of roll 24 from the wickel-thorn 20 at the winding station 46 (Fig. 1), the next roll 14 is rolled up at winding station 26 onto the wickel-thorn 20 at the winding station. Once striping of roll 24 at winding station 46, winding of the next roll 14 onto the wickel-thorn 20 at winding station 26 and handing of the wickel-thorn now with a roll 24 to the transport device 32 at winding station 30 have been completed, the transport device 32 is turned again one more step in the direction of the winding station 34.In the tension station, the 50 support elements of the winding twist 20 are tightened again, i.e. the outer diameter of the 20 winding twist is enlarged again so that the 50 support elements are in the reception position again, i.e. a foil track 14 can be re-wrapped on the winding twist 20 to pump 70 air into the winding twist 20 via a pneumatic head. The 70 pneumatic head is connected to a pressure generator by a hose. To move the 50 support element, the 70 pneumatic head is moved in the direction of an arrow 74 so that a spring 76 56 can be opened and pumped through the air channel 58 into the 20 winding twist.This moves the 50 support elements radially outwards or pre-tensioned, and after two further transport steps from the transport device 32 to the arrow 34 (Fig. 1), the newly pre-tensioned winding torus 20 is returned to the winding station 26 at transfer station 30.

Claims (12)

1. A device for producing film rolls (24), in particular coreless film rolls, comprising a roll holder (10) for receiving a film roll (12) comprising a film sheet (14) to be wound off, a winding mandrel (20) to which the film sheet (14) is adapted to be wound up for producing the film roll (24), wherein the winding mandrel (20) comprises a plurality of displaceable holding elements (50) arranged in the longitudinal direction of the winding mandrel (20) for changing the outer dimensions, and a delivery station (46) for automatically delivering the wound-up film roll (24) from the winding mandrel (20) arranged vertically in the delivery station (46), wherein the delivery station comprises a displacement means (48) for displacing the holding elements (50) into a delivery position.
2. The device according to claim 1, characterized in that the displacement means comprises a relief device (48) for allowing the holding elements (50) to relieve.
3. The device according to any one of claims 1-2, characterized in that the holding elements (50) are hydraulically and/or pneumatically biased into a receiving position and the relief device (48) places the holding elements (50) by pressure reduction into the delivery position.
4. The device according to claim 3, characterized in that the winding mandrel (20) comprises a valve (56) adapted to be opened for pressure reduction.
5. The device according to any one of claims 1-4, characterized by a pull-off means (62) for pulling the film roll (24) off the winding mandrel (20).
6. The device according to claim 5, characterized in that the pull-off device (62) comprises a ram (64) adapted to be displaced in longitudinal direction of the winding mandrel (20).
7. The device according to any one of claims 1-6, characterized by a transport means (32) for transporting the winding mandrel (20) from a wind-up station (26) to the delivery station (46).
8. The device according to claim 7, characterized in that the transport means (32) comprises a plurality of winding mandrel holders (28) for the preferably vertically holding of winding mandrels (20).
9. The device according to claim 8, characterized in that the winding mandrel holder (28) is configured such that the winding mandrel (20) is adapted to be hung up.
10. The device according to any one of claims 1-9, characterized by a tensioning station (68) for placing the holding elements (50) into a receiving position.
11. The device according to any one of claims 1-10, characterized by a transfer station (30) for transferring the winding mandrel from the transport means (32) to the wind-up station (26).
12. The device according to any one of claims 7-11, characterized in that the transport means (32) is configured as an endless transport means.