WO2008017450A2

WO2008017450A2 - Method for carrying out a reel change and splicer for carrying out this method

Info

Publication number: WO2008017450A2
Application number: PCT/EP2007/006965
Authority: WO
Inventors: Tuchwat Schagidow; Manfred Van Triel
Original assignee: Khs Ag
Priority date: 2006-08-09
Filing date: 2007-08-07
Publication date: 2008-02-14
Also published as: ATE458685T1; CN101484375A; MX2009001299A; EP1968874A2; EP1968874B1; US20100024364A1; BRPI0714282A2; DE102006037189A1; DE502007002916D1; WO2008017450A3; JP2010500258A

Abstract

In order to carry out a reel change in a supply unit which serves to feed a web-shaped flat material to a packaging machine or a processing machine of this type from reels which form in each case a flat-material supply, the flat material of the reel which is in use is connected to a joining region of a ready subsequent reel in a joining or connecting station for said reel change.

Description

A method of performing a roll change in a supply unit for feeding a sheet-like sheet to a packaging machine or the like processing machine and supply unit for performing this method

The invention relates to a method according to the preamble of claim 1 and to a supply unit for performing this method according to the preamble of claim 10.

A method of the generic type is known (DE 10 2004 032 528 B3). In this known method, the positionally accurate fastening of the starting or connecting portion of the flat material provided for a roll change connection roller using a clamping rail, the outside of the supply unit or provided there for the roll change connection station using a gauge at the beginning of the sheet of the Attachment roller is attached.

This means that the provided at the beginning of the flat material of the connection roller clamping rail transported together with this connection roller to the connection station and then there must be attached to the positioning, which means at least a relatively complex handling and in confined spaces is often not feasible.

The object of the present invention is to simplify the provision of a connection roller for the roll change. To solve this problem, a method according to claim 1 is formed. A supply unit for carrying out this method is the subject of claim 10.

In the invention, the connection between the beginning of the roll of sheet material to be provided is made directly at the positioning of the connection station by clamping, ie this positioning is formed as a clamping element or pinch roller. After the clamp is then carried out by turning, for example by manually rotating the pinch roller läge- and / or connection accurate alignment of the sheet of the connection roller, to achieve a transition-correct connection of the sheet material during roll change. Further developments are the subject of the dependent claims. The invention will be explained in more detail below with reference to the figures of an embodiment. Show it:

Fig. 1 in a simplified representation and in side view of a supply unit for supplying a sheet-like sheet, for example a sheet material to a packaging machine or the like processing machine;

2 shows a side view of a connecting station of the supply unit for connecting the flat material when changing a used-up supply roll of the flat material against a new supply roll;

Fig. 3 is a schematic representation of the essential elements of the connection station of Fig. 2;

4 shows a detail of one of the mandrels (foil mandrels) of the device according to FIG. 1.

The supply unit, generally designated 1 in the figures, serves for supplying a flat material and, in the illustrated embodiment, specifically for feeding a weldable plastic or packaging film 2 to a packaging machine (not shown). The supply unit 1 has for this purpose on a machine frame 3 u.a. two with their axis in the horizontal direction oriented parallel mandrels 4 and 5, each for receiving a roll 6 and 7 (film roll) of the plastic or packaging film 2 are used, of which one role each in running packaging machine in use role is, from which the film 2 is withdrawn in the direction of arrow A and the packaging machine is supplied, while the other role is available as an exchange or connection roller for a roll change.

Figures 2 and 3 show - each in a state of the supply unit 1 immediately before a roll change - again the two mandrels 4 and 5, arranged on these thorns rollers 6 and 7, of which in the illustrated state, the roller 7 is in use and the roller 6 is ready for a roll change, and further with their axes parallel to each other and parallel to the mandrels 4 and 5 arranged deflection and guide rollers 8 - 10 for the packaging film 2. The deflection and guide rollers 8 - 10 are both at both ends in a frame 11 a likewise mounted on the machine frame 3 Verbindungsbzw. Welding station 12 rotatably mounted.

The guide roller 8 is assigned to the mandrel 4 and the guide roller 9 the mandrel 5. The two guide rollers 10 together with another Roller 13 means 14 in particular for the controlled change or cancellation of the film tension during the roll change. For this purpose, this film 2 is guided over all three rollers 10 and 13. The roller 13 at both ends rotatably mounted on a respective pivot arm 13.1, to which an actuator, such as a pneumatic cylinder 13.2 for a controlled pivoting of the pivot arm 13.1 and thus the roller 13 acts. The roller 13 is used in conjunction with the film clamping device for printing image correct positioning of the film.

Another component of the welding station 12 is a double-ended in frame 11 rotatably mounted pinch roller 15 which forms a clamping slot 16, in the illustrated embodiment in that the pinch roller 15 at least on their required for the function of the welding station 12 part length in two parts from the two sides The clamping slot 16 arranged parts 15.1 and 15.2 is executed, which are clamped for clamping each one of the beginning of the film against each other. The rotation of the pinch roller 15 and possibly also the opening and closing of the nip 16 carried out in the illustrated embodiment manually with a rotary and switching crank 17, which is provided at one end of the pinch roller 15.

Component of the welding station 12 are further two heatable welding rails 18, which lie with their longitudinal extent parallel to the axis of rotation of the pinch roller 15, offset by an angle of slightly smaller than 180 ° about this axis of rotation and controlled by actuators (eg pneumatic cylinder) on the Pinch roller 15 are movable to and from this path.

For a roll change, for example, between the in use in Figures 2 and 3 in use and almost used roll 7 and the new roll 6 available the latter is guided with its beginning of the film on the guide roller 8 in the nip 16 of the pinch roller 15. The attachment of the film beginning in the clamping slot 16 of the pinch roller 15 is in principle carried out so that the beginning of the film used from above into the open nip 16, this is then closed to clamp the film 2. Subsequently, the pinch roller 15 is rotated by hand with the crank 17 in any case far enough that one of the film 2 of the roll used 7 immediately opposite peripheral region of the pinch roller 15 is covered at least one layer with the film 2 of the roll 6 provided for a roll change. The joining of the film beginning with the pinch roller 15 is carried out in such a way that when the roll is changed, a side-to-side film connection takes place. For this purpose, in the illustrated embodiment, the pinch roller 15 is rotated after attaching the beginning of the film so that the direction of rotation B is opposite to the film adjacent to the circumferential region of the pinch roller 15 of the direction of movement A of the film used.

In order to ensure a transition and / or printing image correct connection of the films when reel change, an alignment rail 19 is provided, which is oriented with its longitudinal extent parallel to the axis of the pinch roller 15 and extends over the entire film width. At this Ausrichtschiene 19 which is ready for the roll change film 2 of the roller 6 with provided on the film markers, such as print marks 2.1, aligned exactly.

The alignment of the film on the alignment rail takes place in such a way that the marking applied on the film (print mark) is aligned with the alignment rail. This is done, for example, manually by the operator, who moves the film forward or back after insertion into the nip of the clamping shaft.

After clamping the film beginning in the nip 16, the läge- and connection correct orientation for the welding takes place by a 360 ° rotation of the clamping shaft against the direction of the film roll in use.

The pinch roller 15 is then secured in a suitable manner against rotation.

In order to use this alignment rail both when providing a roll on the mandrel 4, as well as when providing a roll on the mandrel 5 and in particular to improve the accessibility of the pinch roller 15, the alignment rail 19 is pivotally provided.

After aligning and / or clamping the film, it may be necessary to achieve a sufficient film tension between the roller 6 and pinch roller 15 to rotate the standing roller 6 slightly in the direction of increased film tension.

By means of a sensor indicated schematically in FIG. 2, the printed marks 2.1 located on the film 2 removed from the roll 7 are constantly monitored. Alternatively, by suitable sensors and the diameter of the rollers 6, 7 are monitored. If a control computer 21 of the packaging machine connected to the sensor 20 recognizes the imminent consumption of the roll 6, 7 in use, the roll change is initiated by the control computer 21.

In this case, first the processing speed of the packaging machine is stopped, and thus the take-off speed of the film 2 from the roll 7 is slowed down.

For example, by the sensor 20 or by another sensor 22, which scans on the film 2 existing markers, such as the print marks 2.1, finally, the slower removal of the film 2 is stopped.

As a result of the preferably automatic actuation of the actuator 14.2, the film between the used roller 6,7 and the packaging machine is now clamped by the clamping rail 14.1. By preferably automatic actuation of the actuator 13.2 and the associated pivoting of the pivot arm and arranged on this pulley 13 is now removed as much film from the roller 7 until the mark (print mark) of the film is detected by another sensor 20. This is the position in which a transition and / or printing image correct connection of the film 2 of the present film roll 6 is guaranteed to the film roll 2 used until then on the associated welding rail.

Then, controlled by the control computer 21, the moving of the welding and separating rail 18 from the starting position to the welding position, in which by a Trennschweißvorgang connecting the film 2 of the film roll 6 with the film web leading to the packaging machine and at the same time also a separation of This connection produced by the welding process of the film residue of the used or almost used film roll 7 done.

In order to achieve an error-free, in particular stress-free weld during roll change, the initially permanent bias of the film 2 is reduced or eliminated at least in the region of the weld to be created by controlled pivoting of the roller 13 with the pneumatic cylinder 13.2.

After the Trennschweißvorgang 13,2 and pivoting of the pivot arm together with guide roller 13 of the resulting from the wrapping of the clamping shaft film excess between the clamping device 14 and the film roll 6 is tensioned by controlled actuation of the actuator and then the Clamping device 14 is opened. This procedure prevents a sudden load on the fresh weld after the machine has started up again.

Termination of the separation welding, i. after the roll change has taken place, the packaging machine, controlled by the control computer 21, starts again, the film 2 now being pulled off the roll 6. The roller 7 is removed manually from the supply unit. Likewise, the existing on the pinch roller 15 film residue by opening the nip 16. For the new roll change a new roll 7 is placed on the mandrel 5 and the beginning of this role by clamping in the clamping slot 16 on the pinch roller 15 position and connection accurately attached and the Pinch roller rotated by means of the crank 17 so that the first inserted from above into the clamping slot 16 film 2, the pinch roller in turn encloses most of the calf circumference, but at least the film 2 of the roll 6 used facing peripheral region of the pinch roller at least one layer of the Foil 2 is surrounded and also the film 2 is ready for the transition and / or printing image correct connection exactly aligned. By turning the pinch roller 15, optionally in conjunction with a turning back of the roller 7 provided on the mandrel 5, in turn, the required film tension between this roller and the pinch roller 15 is set.

When consumption of the mandrel 4 located on the roller 6 is then carried out in a similar manner again a roll change.

For the roll change is also required that the rollers 6 and 7 are already aligned exactly on the spines 4 and 5. This alignment then takes place so that the center lines of the films withdrawn from the rollers 7 and 6 lie in a common plane perpendicular to the axes of the mandrels 4 and 5 and preferably also in the center line of the product group.

FIG. 4 again shows one of the two mandrels 4 and 5 in detail, together with a roller 6 and 7, respectively. On each mandrel, a roller stop 23 is provided so as to be axially adjustable. The setting of this stop is done for example by using a mandrel 4 or 5 also provided tape measure 24 or other aids, such as sensors, etc.

The invention has been described above by means of an embodiment. It is understood that numerous changes and modifications are possible without thereby departing from the inventive concept underlying the invention. LIST OF REFERENCE NUMBERS

1 supply part

2 flat material or foil 2.1 print mark

3 machine frame 4, 5 mandrel

6, 7 roll or film roll 8 - 10 deflection roll

11 frames

12 welding or bonding station

13 roller

13.1 swivel arm

13.2 Actuating device or cylinder for swivel arm 13.1

14 film clamping device

14.1 clamping beam

14.2 actuating device for clamping bar

15 pinch roller

15.1, 15.2 part of the pinch roller 15th

16 nip

17 crank

18 welding and separating rail

19 alignment rail

20 sensor

21 computers

22 sensor

23 roll stop

24 tape measure

A movement direction of the packaging machine supplied film. 2

B Direction of rotation of the pinch roller

Claims

claims

1. A method for performing a roll change in a supply unit (1), which serves for feeding a sheet-like sheet (2) to a packaging machine or the like processing machine by a respective sheet material forming rollers (6, 7), wherein for the roll change, in in a connection or connection station (12) the flat material (2) of the roller (6, 7) in use is connected to a start or connection region of a waiting connection roller (7, 6), this connection region in the connection station for a transitionally correct connection a positioning element (15) is positioned exactly and after joining the flat material (2) is separated from the roll used until the roll change (6, 7), characterized in that for the exact positioning of the respective connection area, the flat material (2) of the connection roller ( 7, 6) in the connection or connection station (12) vorgese there henen positioning element (15) is fixed by clamping.

2. The method according to claim 1, characterized in that the positioning element is designed as a pinch roller (15).

3. The method according to claim 2, characterized in that the positioning element is designed as a pinch roller (15) with clamping gap (16).

4. The method according to any one of the preceding claims, characterized in that the connection region of the flat material (2) of the connection roller (7, 6) covering the positioning element (15) on at least one peripheral region which the sheet (2) of the roller in use ( 6, 7) is adjacent.

5. The method according to claim 4, characterized in that after connecting the connection area with the positioning element (15) this is rotated about its axis such that the sheet (2) by winding on the periphery of the positioning element (15) this at least in one the flat material (2) of the roller (6, 7) in use covers at least one layer adjacent peripheral region.

6. The method according to any one of the preceding claims, characterized in that the positionally accurate alignment of the flat material (2) of the connection roller (7, 6) on the positioning element (15) using on the flat material (2) provided markings (2.1) and at least an alignment element the connection station (12), for example, using an alignment rail (19).

7. The method according to claim 6, characterized in that the positionally accurate alignment by rotation of the positioning element (15) or by winding the flat material (2) on the positioning element (15).

8. The method according to any one of the preceding claims, characterized in that the connection of the flat material (2) in use with the flat material (2) of the connection roller (7, 6) is performed overlapping.

9. The method according to any one of the preceding claims, characterized in that when using a flat material in the form of a weldable film (2), the joining takes place when changing rolls by welding, preferably by splitting.

10. Supply unit for feeding a web-like flat material to a packaging machine or the like processing machine with at least two roller receptacles (4, 5) for receiving in each case a flat material supply in the form of a roller (6, 7), of which at least one roller (6, 7) the reel in use, from which the sheet material (2) is withdrawn during operation of the packaging machine or the like processing machine, and at least one further roll forming a reel stand (7, 6) ready for reel change, with a connection station (12) through the the flat material (2) of the roller (6) in use is passed and on which at a connection position (18) a connection region of the flat material of the connection roller for a transitionally correct connection exactly positioned on a holding and fastening element (15), characterized in that the holding and positioning element is one around its Axis manually rotatable pinch roller (15).

11. Supply unit according to claim 10, characterized in that for a transitionally correct arrangement of the flat material (2) of the connection roller (7, 6) at the connection position (18) at the connection station (12) alignment means (19) for aligning the flat material (2) are provided using provided on this markers (2.1).

2. Supply unit according to claim 11, characterized in that the alignment means of at least one, preferably pivotable alignment rail (19) are formed.