DE102005000169A1 - Method for longitudinal cutting of a running material web and slitter-winder for carrying out the method - Google Patents

Abstract

The invention relates to a method for longitudinally cutting a running material web (3), in particular a paper or cardboard web, by means of at least one longitudinal cutting device (2; 2.1, 2.2, 2.3, 2.4, 2.5) which makes a longitudinal cut (3) in the running material web (3). A) generated in a first position (P1). DOLLAR A The method according to the invention is characterized in that before the longitudinal section (A, B) is changed from the first position (P1) to a second position (P2), the previous longitudinal section (A) is generated in the first position (P1) of a further longitudinal cutting device (13) when a continued longitudinal cut (A1) is generated and it is continued that the first longitudinal cutting device (2; 2.3) is then brought from the first position (P1) to the second position (P2) and then in the current position Material web (3) generates a new longitudinal cut (B) in the second position (P2) and that subsequently the further longitudinal cutting device (13) producing the continued longitudinal cut (A1) in the first position (P1) is disengaged. DOLLAR A The invention also relates to a roll cutting machine (1) for carrying out the method according to the invention.

Description

was standing of the technique

Such a slitter-winder is known, for example, from the publication "BiWind ^™ Winding Systems - Winders for Total Roll Structure Control" by the Beloit Corporation The unit shown has at least one slitting device, as described, for example, in German Utility Model DE 298 12 753 U1 is known.

The known and several slitters having slitter cutters make of a wide web single narrow bobbins and by additional cross cutting single Bows. In order to produce different bow or bobbin formats, are individual circular knife pairs transverse to the direction of the web positionable.

In a known manner, the pairs of knives in an embodiment of circular knives each consist of a the knife during the cutting supporting pot knife and a dipping into the track tip knife whose cutting edges must be positioned exactly to each other in the desired cutting position. Usually, the pot knife used as a lower blade is driven, while the tip blade is freely rotatably mounted as a top blade. This is for example in the German patent specification DE 34 19 843 C2 described.

Around now at least one also referred to as a pattern change To be able to carry out format changes in the material web, the slitter-winder must be turned off. At once also standing web becomes then at least one pair of knives moved out of the material web, by means of at least one adjusting device at the new cutting position positioned and then retracted back into the web. Now, the slitter rewinder can be put into operation again become.

This currently practiced method for a pattern or format change unfortunately provides the big one Disadvantage that on the one hand, the slitter are turned off must and on the other hand a big one Time required for necessary change is.

task the invention

Of the Invention is therefore the object of a method and a Rewinding machine of the aforementioned types in such a way, that a pattern or format change both at running slitter and with significantly reduced Time required is.

These inventive task is achieved in the aforementioned method in that before a change of the longitudinal section from the first position to a second position the generation of the previous longitudinal section in the first position of another longitudinal cutting device Generated a continued longitudinal section and continuing, then, the first slitter is moved from the first position to the second position and then in the running web a new longitudinal section in the second position generated, and that subsequent, the further, the continued longitudinal section disengaged in the first position longitudinal cutter is set.

The inventive task is completely solved in this way.

The inventive method creates the opportunity while running slitter a Schnittmuster- or Format change to be able to. This results, inter alia, a significantly reduced time required for the change with only slight additional costs for the further longitudinal cutting device, the exclusively for the Change process is put into operation.

In a first preferred embodiment it is envisaged that the running material web to disengage the further longitudinal cutting device in one the two longitudinal sections comprehensive overlap area is severed transversely to their direction. This will be the new patterns or formats fast and clean of the old pattern or formats separated, it arise all not so-called "bridges".

The first longitudinal cutting device can while the change from the first position to the second position at least temporarily except Intervention can be set, it can even be permanently disengaged or she can also be constant will remain engaged. All three ways favor basically a fast and clean pattern Format change.

In terms of process technology, it is advantageous if the longitudinal section in the first position and the longitudinal section in the second position are generated by a first longitudinal cutting device having at least one circular knife, preferably two circular knives arranged as a pair of knives. The continued longitudinal section in the first Position, however, is preferably generated by a designed as a laser beam or water jet second longitudinal cutting device. The type of first longitudinal cutting device has already proven itself in the past in many applications, both in terms of cutting quality, durability and thus the cost. Since the further longitudinal cutting device has only a fraction of the operating time of the first longitudinal cutting device, it is well suited in dargestter execution for the task.

at a slitter of the type mentioned is the inventive task solved by that a further preferably controllable longitudinal cutting device for temporary takeover and continuation of that of the first longitudinal cutter so far generated longitudinal section is provided in the first position and that a preferably controllable adjusting device for carrying the first longitudinal cutting device is provided from the first position to a second position.

The inventive task is completely solved in this way and it already results aforementioned advantages of the invention.

The further longitudinal cutting device may be the first longitudinal cutting device preceded in the first position against the direction of the web or she can put her in the first position in the direction of the Be subordinate material web. Both options become a continuous one longitudinal section generated in the first position.

Under process-technological aspects, it is again advantageous if the further longitudinal cutting device a preferably controllable laser beam or water jet device comprises.

1

Winder

2

Slitter

2.1 2.2, 2.3, 2.4, 2.5

Slitter

 3

web

4

pair of blades

 5

knife (Lower blade)

6

knife (Upper part diameter)

 7, 8th

carriage

9 10

knife Traverse

 11 12

knife holder

13

Further Slitter

 14

Laser beam- or water jet device

15

carriage

 16

traverse

17

setting device

 18

servomotor

19

Control / regulation unit

 A

first longitudinal section

A1

continued longitudinal section

 B

longitudinal section

B _I , B _II , B _III , B _IV , B _V , B _VI , B _VII

width

 C

overlap area

I, II, III, IV, V, VI, VII

single track

L

direction (Arrow)

 P1

First position

P2

Second position

 R1, R2

edge strips

example

Further Features and advantages of the invention will become apparent from the following Description of preferred embodiments with reference to the drawing.

It demonstrate

1 a schematic and partial side view of a slitter according to the invention;

2 a plan view of a material web in the region of the roll cutting machine according to the invention in a first embodiment of a pattern or format change; and

3 a plan view of a material web in the region of the roll cutting machine according to the invention in a second embodiment of a pattern or format change.

The in the 1 partial slitter shown in its side view 1 comprises a longitudinal cutting device 2 for cutting a running material web 3 , in particular a paper or board web, in a first position P1. In this case, a first longitudinal section A is generated.

The slitting device 2 has a pair of knives 4 on, the one the material web 3 during cutting supporting knife 5 (Bottom knife) and one in the material web 3 dipping knife 6 (Upper blade) includes. The cutting edges of the two knives 5 . 6 must be positioned exactly to each other in the desired cutting position. Preferred are lower knives 5 driven Pot knife and as upper knife 6 disc-shaped and freely rotatable pointed blade used, as described for example in the aforementioned German patent DE 34 19 843 C2 are described.

The two knives 5 . 6 are each on a sled 7 . 8th arranged, which in each case one transverse to the direction L (arrow, WTD = Web Travel Direction) of the web 3 extending knife beam 9 . 10 are adjustable and each one a knife holder 11 . 12 for storage and preferred movement of the associated knife 5 . 6 exhibit. Every knife 5 . 6 is to set the required format width transverse to the direction L (arrow) of the material web to be divided 3 positionable. In addition, every upper knife is 6 in the direction of its axis of rotation against the associated lower blade 5 adjustable, so that the two cutting edges can be aligned exactly relative to each other. In a non-illustrated embodiment, the knife 5 . 6 Of course, be stored on a common sled.

It is now another preferably controllable longitudinal cutting device 13 for temporary acquisition and continuation of the first longitudinal cutting device 2 previously produced longitudinal section A provided in the first position P1. The further longitudinal cutting device 13 is the first slitter 2 in the first position P1 against the running direction L (arrow) of the material web 3 upstream and includes a preferably controllable laser beam or water jet device 14 , The further longitudinal cutting device 13 can in a further, but not explicitly shown embodiment of the first longitudinal cutting device 2 in the first position P1 in the running direction of the material web also be arranged downstream. The type and operation of such a preferably controllable laser beam or water jet device 14 is well known to the skilled person and therefore requires no further explanation. She is also on a sled 15 arranged on a transversely to the direction L (arrow) of the material web 3 extending crossbar 16 adjustable, that is positionable stored. Thus, the further longitudinal cutting device 13 to the position P1 of the first longitudinal cutting device 2 to be brought.

Furthermore, the slitter rewinder includes 1 a preferably controllable control device 17 for bringing the first longitudinal cutting device 2 from the first position P1 to a second position ( 2 . 3 ). The controllable adjusting device 17 For example, two electric servomotors 18 include the sledges 7 . 8th on which the two knives 5 . 6 each over the respective knife holder 11 . 12 are preferably movably mounted, according to the position P1 in the position P2 ( 2 . 3 ), in particular, move.

The movement causing components, such as the knife holder 11 . 12 the moving according to the invention longitudinal cutting device, the adjusting device 17 for the knife holder 11 . 12 as well as the further longitudinal cutting device 13 Depending on the process sequence according to the invention in the known manner with a merely schematically indicated control unit 19 connected to the control of the method for longitudinal cutting of a running material web 3 , in particular a paper or board web takes over. The control unit 19 can in turn be connected to a higher-level process control system (PLS).

The slitter 1 can have both a reel and two reeling. A slitter 1 with two reels, which is referred to in professional circles as a tandem reel cutting machine, for example, from the two international patent applications WO 99/61360 A1 (back-up roller) and WO 00/43308 A2 (Doppeltragwalzenroller) known.

The 2 shows a plan view of a material web 3 with a running direction L (arrow) in the area of the slitter-winder 1 in a first embodiment of a marker or format change.

The slitter 1 comprises by way of example five longitudinal cutting devices shown schematically 2.1 . 2.2 . 2.3 . 2.4 . 2.5 , which are all in engagement before the pattern or format change, and thereby four single lanes I, II, III, IV in the running material web 3 produce. The individual webs I, II, III, IV shown have a respective width B _I , B _II , B _III , B _IV . The two edge-side slitting devices 2.1 . 2.5 inevitably ever produce an edge strip R1, R2. They are moved so that the respective tapered section is located on the wider winding. The purpose of this exercise is to avoid protruding "noses." The old right single track lacks a small rectangular tail at the right edge, while the "new" right single track at the far left begins with a corresponding rectangular "flaw".

In the embodiment of the 2 is now a pattern or format change of the shape provided that after its completion, only three single webs V, VI, VII are generated with a respective width B _V , B _VI , B _VII . For this purpose, the slitter is 2.4 disengaged and the two edge-side slitters 2.1 . 2.5 be in one grab a small path to the left.

At the longitudinal cutting A generating longitudinal cutting device 2.3 is in the context of Schnittmuster- or format change, the inventive method for slitting a running web 3 , in particular a paper or board web, by means of at least one longitudinal cutting device 2.3 in the running web 3 produces a longitudinal section A in a first position P1, applied. Of course, the inventive method for longitudinal cutting of a running material web 3 at the same time also be performed on other slitting devices.

It is provided that before a change of the longitudinal section A from the first position P1 to a second position P2 (longitudinal section B), the generation of the previous longitudinal section A in the first position P1 of a further longitudinal cutting device 13 is taken over and continued when generating a continuous longitudinal section A1. Subsequently, the first longitudinal cutting device 2.3 brought from the first position P1 to the second position P2 (arrow) and then generated in the moving web 3 a new longitudinal section B in the second position P2. Subsequently, the further, the continued longitudinal section A1 in the first position P1 generating longitudinal cutting device 13 disengaged.

In the embodiment of the 2 the first longitudinal cutting device remains 2.3 during their change from the first position P1 to the second position P2 continuously engaged.

In general, the running material web 3 after disengagement setting of the further longitudinal cutting device 13 in an overlapping region C encompassing the two longitudinal sections A1, B, transversely to their running direction L (arrow). It should also be noted that also the slitting device 2.4 generally in the overlap area C is disengaged.

The longitudinal section A in the first position P1 and the longitudinal section B in the second position P2 is formed by a first longitudinal cutting device having two circular knives arranged as a pair of knives 2.3 generated. On the other hand, the continued longitudinal section A1 in the first position P1 is formed by a second longitudinal cutting device designed as a laser beam or water jet device 13 generated.

The 3 shows a plan view of a material web 3 in the area of the slitter-winder 1 in a second embodiment of a pattern change or format change.

This pattern or format change generally corresponds to that in the 2 illustrated change method, so that reference is made to this. Only the slitter 2.3 is continuously disengaged during its change from the first position P1 (longitudinal section A) to the second position P2 (longitudinal section B).

In principle, only temporarily can be disengaged, as indicated by dashed lines. That of the further longitudinal cutting device 13 produced continuous longitudinal section A1 is shown in dashed lines.

The both longitudinal sections A1, B are in turn of the overlap area C includes.

In summary It should be noted that a method and a Reel cutting machine of the aforementioned types developed in such a way be that a pattern change or format change both when the slitter winder is running as well as with significantly reduced Time required can be.

Claims (11)

Method for longitudinal cutting of a running material web ( 3 ), in particular a paper or board web, by means of at least one longitudinal cutting device ( 2 ; 2.1 . 2.2 . 2.3 . 2.4 . 2.5 ), in the running web ( 3 ) produces a longitudinal section (A) in a first position (P1), characterized in that prior to a change of the longitudinal section (A, B) from the first position (P1) to a second position (P2) the generation of the previous longitudinal section (A ) in the first position (P1) of a further longitudinal cutting device ( 13 ) is taken over when a continuous longitudinal section (A1) is generated and it is continued that the first longitudinal cutting device ( 2 ; 2.3 ) is brought from the first position (P1) to the second position (P2) and then in the moving web ( 3 ) generates a new longitudinal section (B) in the second position (P2), and that subsequently the further, the continued longitudinal section (A1) in the first position (P1) generating longitudinal cutting device ( 13 ) is disengaged. Method according to claim 1, characterized in that the moving material web ( 3 ) after disengagement of the further longitudinal cutting device ( 13 ) in an overlapping the two longitudinal sections (A1, B) overlap region (C) is severed transversely to its direction (L). Method according to claim 1 or 2, characterized in that the first longitudinal cutting device ( 2 ; 2.3 ) during their change from the first position (P1) to the second position (P2) at least temporarily disengaged. Method according to claim 3, characterized in that the first longitudinal cutting device ( 2 . 2.3 ) is continually disengaged during its change from the first position (P1) to the second position (P2). Method according to claim 1 or 2, characterized in that the first longitudinal cutting device ( 2 ; 2.3 ) continuously remains engaged during its change from the first position (P1) to the second position (P2). Method according to one of the preceding claims, characterized in that the longitudinal section (A) in the first position (P1) and the longitudinal section (B) in the second position (P2) of at least one circular blade, preferably two as a pair of blades ( 4 ) arranged circular knives ( 5 . 6 ) having first longitudinal cutting device ( 2 ; 2.3 ) is produced. Method according to one of the preceding claims, characterized in that the continuous longitudinal section (A1) in the first position (P1) of a laser beam or water jet device ( 14 ) formed second longitudinal cutting device ( 13 ) is produced. Slitter ( 1 ) with at least one longitudinal cutting device ( 2 ; 2.1 . 2.2 . 2.3 . 2.4 . 2.5 ) for cutting a running material web ( 3 ), in particular a paper or board web, in a first position (P1), wherein the preferably controllable longitudinal cutting device ( 2 ; 2.1 . 2.2 . 2.3 . 2.4 . 2.5 ) a knife pair ( 4 ), one in the web ( 3 ) while cutting supporting knife ( 5 ) and the one in the web ( 3 ) dipping knife ( 6 ) and both knives ( 5 . 6 ) on at least one carriage ( 7 . 8th ) are arranged, which at a transversely to the running direction (L) of the material web ( 3 ) extending knife beam ( 9 . 10 ) is adjustably mounted and the one knife holder ( 11 . 12 ) for storing the associated knife ( 5 . 6 ), characterized in that a further preferably controllable longitudinal cutting device ( 13 ) for temporary acquisition and continuation of the first slitter ( 2 ; 2.3 ) previously produced longitudinal section (A) in the first position (P1) is provided and that a preferably controllable / control device ( 17 ) for bringing the first longitudinal cutting device ( 2 ; 2.3 ) is provided from the first position (P1) to a second position (P2) Slitter ( 1 ) according to claim 8, characterized in that the further longitudinal cutting device ( 13 ) of the first longitudinal cutting device ( 2 . 2.3 ) in the first position (P1) counter to the running direction (L) of the material web ( 3 ) is arranged upstream. Slitter ( 1 ) according to claim 8, characterized in that the further longitudinal cutting device ( 13 ) of the first longitudinal cutting device ( 2 . 2.3 ) in the first position (P1) in the running direction (L) of the material web ( 3 ) is subordinate. Slitter ( 1 ) according to claim 8, 9 or 10, characterized in that the further longitudinal cutting device ( 13 ) a preferably controllable laser beam or water jet device ( 14 ).