DE102006016266B3 - Assembly to effect a transverse cut or perforation in a web of moving paper has knife drum mounted on tilt frame - Google Patents

Abstract

A transverse cutting or perforation station for a moving paper web has a transverse knife mounted on a rotating drum. The rotating drum is supported by a side-frame (02) that tilts on an axle between a cutting position and a non-cutting position. The shift is effected by a hydraulic or pneumatic cylinder (04).

Description

The The invention relates to a device for processing a running Material web according to the preamble of claim 1.

Such a processing device is off DE 39 34 673 C2 known. In this known device is a cross-cutting device, that is, the tool is a knife, which serves to cut the web into individual products at the processing site. In this known device, the knife is pivotable about the rotating first axis in order to be able to adapt the web speed of the knife blade during cutting exactly to the passage speed of the web with changing lengths of the products to be cut.

About the Cross cutting beyond are no further applications provided the known device.

It would be though in principle conceivable, the cutting blade of the known device by perforating to replace, but would cause this that separate products will no longer be obtained, but only a coherent one Path of perforations separated from each other by sheets. To subsequently individual Produce products from multiple sheets separated by perforations, would be a further cross-cutting device required. It is very difficult, to control such a device so that it travels between the tracks Cut two sheets exactly at an existing perforation. When cut and perforation does not exactly coincide on one side of the cut a narrow perforated edge strip back, what kind of many applications is unacceptable.

The DE 19 60 171 U1 describes a cutting device with rotating knives for paper processing machines. In this case, a knife shaft is rotatably mounted on a rotating cylinder via a planetary gear.

Of the Invention is based on the object, a device for processing a running material web with a variable distance of the processing site to accomplish.

The The object is achieved by the Characteristics of claim 1 solved.

The particular advantages of the invention are that by the phase of the rotational movement of the tool holder relative to the phase of the orbital motion of the first axis between a first Phase in which the tool during the passage of the tool holder by the processing point suitable for processing the material web Orientation holds, and a second phase position is adjustable, in the tool during the passage of the tool holder through the processing point may have an orientation unsuitable for processing, may vary depending on Phasing of the tool allowed processing of the material web or be suppressed. In particular, if the machining is a perforation, a Perforation between two successive sheets of the material web repressed to be able to cut cleanly between these bows.

In which is suitable for processing the material web orientation the tool preferably over a centered on the axis, the transport route touching Circle over, while it yourself in the orientation unsuitable for processing within of the circle is located.

The second axis may be stationary in the device; but she can also be off the transport route to the device shut down in a production process where it is not needed to be able to.

Around on the one hand, the orbital movement of the first axis to the second and on the other hand, the rotation of the tool holder about the first axis independently driving one another and being able to regulate their speed is each a motor for driving the orbital motion of the first axis and a second motor for driving the rotation of the tool holder intended.

there the second motor is preferably arranged stationary and drives the rotation of the tool holder over a coaxial to the second axis wheel.

alternative can be provided that the second motor via a differential gear to the rotation of the first axis and to the rotation of the knife holder is coupled. The differential gear can be designed in particular be that when determining the second motor a given phase between the rotational movement of the tool holder and the circulation movement the first axle is permanently retained, leaving the second engine only has to be operated to adjust this phase position.

According to a particularly preferred embodiment, the tool holder carries at least two tools of different types. For example, these tools may be different perforators, of which only one may be in a production job is selectable by suitable adjustment of the phase position between the rotational movement of the tool holder and the rotational movement of the first axis, is used. It can also be combined perforating and cutting blade on the tool holder, so that the device allows by appropriately adjusting the phase position to switch between the perforating and cutting operation when the web is running and z. Example, in a single operation to cut a web into products that comprise several mutually offset by perforations sheet.

The Device is especially in a folder or a rewinder applicable.

A Another special feature of the device is that it allows by adjusting the phase position, the penetration depth of the tool adapt to the material web at the thickness thereof.

embodiments The invention are illustrated in the drawings and are in Following closer described.

It demonstrate:

1 a schematic side view of a device in a working position;

2 the device off 1 in a detached, not ready to work position;

3 a schematic plan view of the device;

4 a schematic partial side view of the device with a perforator in a non-perforating phase position;

5 the device of 4 in a different phase;

6 the device in a perforating phase position;

7 another side view with possible orientations of the Perforiermessers;

8th one too 5 analog representation of a second embodiment of the device;

9 to 11 Examples of the time course of the rotational speed of the spindle of the device 8th ;

12 one too 5 analog representation to illustrate the adaptation of the device to different thicknesses of a web to be processed;

13 a first application example;

14 a second example of application of the device according to the invention.

1 shows a schematic side view of a perforating according to the present invention. The perforating device comprises a roller 01 , z. B. a knife roller 01 whose to the level of 1 vertical axis 10 , z. B. axis of rotation 10 of two rigidly interconnected frame plates 02 is held, of which only one in the 1 is visible. The frame plates 02 are on fixed side frame plates 20 around an axis 03 hinged pivotally. actuating means 04 , z. As electronic actuating means, hydraulic or pneumatic cylinders 04 grab on the frame plates 02 on the one hand and the frame plates on the other hand, to pivot the frame plates 02 and the knife roll 01 between the in 1 shown position and in 2 to allow shown position.

In the position of 1 is the knife roller 01 against a roller 06 , z. B. counter pressure roller 06 pressed, and a material web to be perforated 07 , z. B. paper web 07 is through a processing station 05 , z. B. a gap 05 between the two rollers 01 ; 06 guided and slightly distracted from the straight path, so they the knife roller 01 wraps around on a small angle.

At the knife roller 01 is a tool holder 08 , z. B. a spindle 08 rotatably mounted, which is a tool 09 , z. B. a perforator 09 wearing. In the configuration shown, the perforating knife 09 is about to coincide with one in a groove of the platen roller 06 held cutting bar 11 the gap 05 between the rollers 01 ; 06 to happen.

At the viewer facing end face of the knife roller 01 are two rotatably connected gears 12 ; 13 coaxial with the knife roller 01 and rotatably supported with respect thereto. The gear 12 is in engagement with another gear 14 whose axis is the shaft of a drive motor 16 that is fixed to the frame plates 02 held and in the representation of 1 and 2 from the gear 14 is covered. The gear 13 meshes with one on the spindle 08 non-rotating pinion 17 ,

Another drive motor 18 for driving the rotation of the knife roller 01 is located in extension of the axis 10 at the in the perspective of 1 facing away from the viewer end face of the knife roller 01 , One with the knife roller 01 rotatably connected, in the perspective of 1 and 2 on the side facing away from the viewer end face of the knife roller 01 arranged gear meshes in the position of 1 with a gear 21 which on the in relation to the side frame plates 20 fixed axis 22 the counterpressure roller 06 sits in order to drive them in synchronism with the knife roller 01 and in opposite directions to this. In the position of 2 are the gears 19 ; 21 not engaged. Instead of the gears 19 ; 21 can to Drehantreiben the counter pressure roller 06 also a separate, not shown drive motor can be provided, which in a return of the device from the configuration of 2 in the the 1 can be actuated to the phase position of the platen roller 06 in relation to the knife roller 01 so adjust that the perforator 09 each simultaneously with the cutter bar 11 the gap 05 between the rollers 01 ; 06 happens.

An alternative embodiment result is that through the gears 12 ; 13 ; 14 or pinion 17 formed gearbox replaced by a differential gear such as a planetary gear or a harmonic drive gear, of which a first main shaft to the axis of rotation 10 the knife roller 01 , a second main shaft to the spindle 08 and a control shaft to the drive motor 16 connected. If the differential gear with driving and driven gears has a gear ratio of 1: 1, rotate the knife cylinder 01 and the spindle 08 at the same speed, as long as the drive motor 16 stands, and once set orientation of the perforator 09 remains until it is with the help of the drive motor 16 is adjusted.

A further alternative embodiment result instead of over the entire length of the knife roller 01 extending spindle 08 two spindles provided, each only over a part of the length of the knife roller 01 extend. By independently rotating these two spindles, it is possible to have different perforation patterns on two sides of the web 07 to produce, so that the material web 07 later can be cut longitudinally in two differently perforated partial webs.

In the simplified side view of 4 are a front side of the knife roller 01 , which rotates in the knife roller 01 mounted spindle 08 with the perforator 09 , the pinion 17 and the engaging with him, the knife roller 01 coaxial gear 13 to see. In the orientation of 4 happens the perforator 09 the gap 05 between the rollers 01 ; 06 in one of the axes of the knife roller 01 facing orientation, where it is not beyond the circumference of the knife roller 01 survives and consequently one between the rollers 01 ; 06 guided paper web 07 not perforated. The speed of the drive motor 16 is so controllable that the speed of the gear 13 with that of the knife roller 01 matches. If this is the case, the knife roller rotates 01 and the perforator 09 retains its axis of rotation during the turn 10 the knife roller 01 oriented orientation. So can any length of material web 07 between the rollers 01 ; 06 pass through without being perforated.

As you can see, the suspension of the knife roller 01 on the swiveling frame plates 02 Although useful, as it allows, in the parked configuration of the 2 , in which the material web 07 straight and without one of the rollers 01 ; 06 to touch, between these runs, the drive motors 16 ; 18 to turn off, so as to reduce the power consumption of the device and to avoid wear, if a perforation of the web 07 is not needed. The swiveling suspension of the knife roller 01 However, it is not absolutely necessary, because it perforates the paper web 07 by suitable choice of the speed of the drive motor 16 can also be avoided if the paper web 07 in contact with the rollers 01 ; 06 goes through between them.

If the gear 13 is rotated at a rotational speed ω _s , which is different from the rotational speed ω _{m of} the knife roller 01 differs, so the orientation of the perforator shifts 09 from one nip to the other by a value proportional to the difference ω _s -ω _m , in 5 denoted by α. These phase shifts can cumulate over several revolutions, until finally, for example, the in 6 is reached, in which the perforating knife 09 when passing through the gap 05 pointing radially outwards. In this position, the paper web 07 from the perforator 09 perforated.

When, after reaching this orientation, the rotational speeds of the roller 01 and the gear 13 Adjusting each other, the alignment of the perforator remains 09 radially outward, and each time the perforator blade passes 09 through the gap 05 becomes a perforation in the paper web 07 cut.

As 7 For example, there is a range of orientations of width ± β about the radially outward orientation of the perforating knife 09, in which the tip of the perforating blade 09 over the circumference or circle of the knife roller 01 survives. If the perforator 09 in such, not exactly radial orientation the gap 05 There is a risk that it is off the cutting bar 11 on the counter-pressure roller 06 meets. To avoid this, the speed difference between knife roll 01 and gear 13 be regulated so that the amount of phase shift between the two per revolution of the knife roller 01 is either 0 or at least β.

Of the Because of simplicity, in the following embodiments, a gear ratio of i = 1 is assumed between 13 and 17.

8th shows a modified embodiment of the invention, also in a schematic side view, which differs from the previously considered in that several tools 09 ; 23 ; 24 at the same angular distance from each other on the spindle 08 are attached. At the tools 23 ; 24 For example, it may be a perforating knife of the perforating knife 09 different type act, which has a different pattern of perforation than this in the web 07 to cut. In the presentation of the 8th there is the perforator 09 in a direction suitable for perforation. As described above, it can be held as long as desired in this orientation when the gear 13 from the drive motor 16 is rotationally driven at the same angular speed as the knife roller 01 from the drive motor 18 , By during one revolution of the knife roller 01 the rotational speed of the gear 13 reduced to ω _s = 5/6 ω _m or increased to 7/6 ω _m , the spindle passes 08 in one opposite the representation of the 8th by 60 ° twisted orientation, in one of the tools 23 ; 24 oriented radially inward and none of the tools 09 ; 23 ; 24 when passing through the gap 05 over the circle of the knife roller 01 survives. In this orientation, any machining by the tools is omitted 09 ; 23 ; 24 , After another revolution with the reduced or increased rotational speed is one of the tools 23 or 24 in the radially outward orientation and thus processed as it passes through the gap 05 the material web 07 ,

Of course, instead, during one revolution of the knife roller 01 the rotational speed of the gear 13 reduced to ω _s = 2/3 ω _m or increased to ω _s = 4/3 ω _m ; In this case, the spindle is laid between two nip passages 08 a third of a turn back, so that over a revolution of the knife cylinder 01 from a processing by the perforator 09 directly to a processing by one of the tools 23 ; 24 can be switched.

The diagram of 9 shows a first example of a possible time course of the rotational speed ωs of the gear 13 during operation of the embodiment of 8th , The time t is plotted on the ordinate of the diagram, wherein times t1, t2, t3, etc., respectively, represent times of the passage of the perforating blade 09 through the gap 05 describe. On the abscissa is the rotational speed ω _{s of} the gear 13 in multiples of the rotational speed ω _{m of} the knife roller 01 applied. In the time intervals [0, t1] and [t1, t2], ω _s = ω _m . The perforator 09 happens at the times t1; t2 the gap 05 in the in 8th shown orientation and perforated the web 07 , From t2 to t3, the rotational speed ω _s is reduced by one third, so that at the gap 05 Passage at time t3 the rotation of the spindle 08 lags by a third turn. This is the tool 23 , z. B. a cutting blade 23 in the radially outward orientation, and the web of material 07 is cut.

In the following time interval [t3, t4], ω _s = 4/3 ωm, so that at time t4 the original phase position is restored, so that the perforator 09 in radially outward orientation, the gap 05 happened and the web 07 perforated. In order to maintain this orientation, both rotational speeds ω _s , ω _{m are the} same in the subsequent time interval [t4, t5]. In the next time interval [t5, t6], the rotational speed is ω _{s of} the gear 13 set again to 2/3 ω _m to get back the cutting knife 23 in the active position and at time t6 the web 07 to cut. By cyclically repeating the course of the velocity from t3 to t6 in the following, products are obtained with the aid of the device, each comprising three successive perforations separated from each other by perforations.

By varying the number of successive time intervals with ω _s = ω _m , products with more or less than three contiguous sheets can be obtained.

The rotational speed of the 9 is also in the device according to 1 to 7 applicable; This supplies, if with the speed course of the 9 is operated, a material web 07 in which in each case after two out of three successive sheets a perforation is produced and after the third sheet the perforation is missing. At the non-perforated location, the products may be singulated by a subsequent cutter.

If in the device of the 8th the tool 23 a cutting knife 23 and the tool 24 one with the perforator 09 identical perforator 24 Also, products from each of three sheets spaced apart by perforation can be obtained by the gear 13 continuously with ω _s = ω _m 2/3, as shown in 10 shown, or is operated with ω _s = 4/3 ω _m . In one case as in the other case the tools change 09 ; 23 ; 24 each other at each nip passage of the spindle 08 zy cliché, so that after every two perforations a cut is formed.

If as in the case of 10 the rotational speed of the gear 13 from that of the knife roll 01 differs, so deviates in general, the web speed of each active in the gap passage tool 09 ; 23 or 24 from that of adjacent peripheral surfaces of the knife roller 01 from. Such a deviation may be desired and utilized to track the web speed of the tool 09 ; 23 ; 24 exactly to the material web 07 to match and so the perforation in the longitudinal direction of the web 07 narrow limit. There may also be a deviation between the web speeds of the tool 09 ; 23 or 24 and the material web 07 be used to obtain in the web running direction elongated perforation holes and thus to enhance the perforation effect.

In order to minimize the longitudinal extent of the perforation holes or steer specifically stepless, there is also a modulation of the rotational speed of the gear 13 in the course of one revolution of the knife roller 01 into consideration, as in 11 shown. Here is each at times t1, t2, ... of the gap passage, the rotational speed ω _s of the gear 13 to the knife roller 01 in each case while it is lowered between two gap passes to a value of slightly less than 2/3 ω _m , so that the time integral of ω _s between two gap passes in each case gives exactly 2/3 revolutions. This is how the tools change 09 ; 23 ; 24 as in the case of 10 at each nip passage, but the web speed with which they pass the gap 05 is the same as in the case of identical rotational speeds ω _m , ω _s .

So far, only the case was considered that a knife the gap 05 either through in a radially outward orientation, around the web of material 07 to perforate or cut, or the gap 05 goes through in an orientation in which it is not above the circle of the knife roller 01 survives and the material web 07 leaves unprocessed. Of course, a knife (hereinafter again only the perforator 09 but what is said also for example for the cutting blade 23 the embodiment of 8th applies) the gap 05 in an orientation deviating from the radially outward orientation, as in FIG 12 shown, in which it passes over the circle of the knife roller 01 does not survive as far as exactly radial orientation, but it is still capable of the material web 07 to perforate (or cut). By the angle γ to the the perforator 09 deviates from the exactly radially outward orientation, by briefly varying the rotational speed ω _{s of} the gear 13 is targeted, the supernatant of the perforator can 09 over the circle of the knife roller 01 exactly to the material thickness of the material web to be processed 07 be adjusted. Ie. when passing through the gap 05 penetrates the perforator 09 the material web 07 and comes in contact with the platen roller 06 without cutting into it. This enables low-wear operation.

In particular, in this case, it is expedient if the rotation of the counter-pressure roller 06 not mechanically rigid to the knife roller 01 is coupled, but the counter pressure roller 06 has its own drive motor, which is the counter-pressure roller 06 at the same rotational speed as the knife roller 01 but with respect to this variable phase drives. As in 12 can be seen, happens - depending on the sign of the angle γ - the tip of the perforator 09 the level 26 in which the axes 10 ; 22 the two rolls 01 ; 06 lie, slightly before or, as shown in the figure, after the spindle 08 , By adjusting a phase shift between the knife roller 01 and the counter-pressure roller 06 Ensures that the tip of the perforating knife clears the gap 05 simultaneously with the cutter bar 11 happens.

The location of the perforation on the paper web 07 but has shifted in relation to a register mark. This offset can be caused by a phase shift of the knife roller 01 and counterpressure roller 06 To get picked up.

13 shows a first application example of the perforating according to the 1 to 7 and 13 , The perforator, with 27 is at the entrance of a folder, between two pairs of draw rollers 28 respectively. 29 arranged. The path of the material web 07 extends from the lower Zugwalzenpaar 29 to one of a folding cylinder 31 on the one hand and a knife cylinder 32 on the other hand limited gap. The rotation of the knife cylinder 32 is with the operation of the perforator 27 so synchronized that the knife of the knife cylinder 32 the material web 07 each between two sheets cut, between which through the perforating 27 no perforation is formed (course 9, device according to 1 to 7 ).

The isolated in this way products are in a conventional manner of Punkturleisten or grippers of the folding cylinder 31 fixed to the latter and forwarded to a transfer gap to a jaw cylinder 33 , The by the transfer to the jaw cylinder 33 transversely folded products arrive from the jaw cylinder 33 on a belt conveyor 34 or a paddle wheel 36 from where they are designed scaled who the.

By suitable synchronization of Perforiervorrichtung 27 and knife cylinder 32 If necessary, a perforation can be made in other, meaningful places (center = cross-brim and sizing support, 1/3 to 2/3 = delta fold support, other position for eg "tear-off products").

From the foregoing description, it is easy to understand that a perforating device 27 in a folder from in 13 The type shown can also be integrated by the knife cylinder 32 through the with perforating and cutting knife 09 ; 23 ; 24 equipped knife roller 01 of the 8th is replaced, in which case the folding cylinder 31 the role of the impression cylinder 06 takes over.

14 shows the integration of the perforator 27 in a rewinder, where they are between two guide rollers 37 ; 38 is placed.

01

Roller, knife roll

02

frame plate

03

axis

04

Regulators, Hydraulic cylinders, pneumatic cylinders

05

Processing site, gap

06

Roller, Backing roll

07

Web, paper web

08

Tool holder, spindle

09

Tool, perforating

10

Axis, axis of rotation

11

cutting bar

12

gear

13

gear

14

gear

15

16

drive motor

17

pinion

18

drive motor

19

gear

20

gear

21

Side frame plate

22

Axis ( 06 )

23

Tool, cutting blade

24

Tool, perforating

25

26

level

27

perforator

28

pulling roller

29

pulling roller

30

31

folding cylinder

32

diameter cylinder

33

jaw cylinder

34

Belt conveyor

35

36

paddle wheel

37

guide roll

38

guide roll

α

Value, proportional

β

width

γ

angle

ω _s

rotation speed

ω _m

rotation speed

t

Time

t1

time

t2

time

t3

time

t4

time

t5

time

t6

time

Claims (16)

Device for processing a moving material web ( 07 ) with at least one tool ( 09 ; 23 ; 24 ), which on at least one rotatable around a first axis tool holder ( 08 ), wherein the first axis about a second axis ( 10 ) driven, and with a transport path for the material web ( 07 ) with the path of the tool holder ( 08 ) at a processing point ( 05 ), wherein the phase of the rotational movement of the tool holder ( 08 ) relative to the phase of the orbital movement of the first axis between a first phase position in which the tool ( 09 ; 23 ; 24 ) during the passage of the tool holder ( 08 ) by the processing station ( 05 ) one for processing the material web ( 07 ) has appropriate orientation, and a second phase position is adjustable, in which the tool ( 09 ; 23 ; 24 ) during the passage of the tool holder ( 08 ) by the processing station ( 05 ) has an unsuitable orientation for processing, wherein a first drive motor ( 18 ) for driving the orbital motion of the first axis and at least a second drive motor ( 16 ) for driving the rotation of the tool holder ( 08 ) are arranged about the first axis. Device according to claim 1, characterized in that the tool ( 09 ; 23 ; 24 ) in the for processing the material web ( 07 ) suitable orientation over one on the second axis ( 10 ) centered, the transport path touching circle survives and is in the improper orientation within the circle. Device according to claim 1 or 2, characterized in that the second axis ( 10 ) is stationary. Device according to claim 1 or 2, characterized in that the second axis ( 10 ) is off the transport route. Device according to one of the preceding claims, characterized in that it has a second axis ( 10 ) coaxial rotatable cylinder ( 01 ), on which at least one first axis is fixed, and in that in the first phase position the tool ( 09 ; 23 ; 24 ) during the passage through the processing station ( 05 ) over the lateral surface of the roller ( 01 ), while in the second phase position inside the roller ( 01 ) is sunk. Apparatus according to claim 1, characterized in that the second drive motor ( 16 ) is stationary and the rotation of the tool holder ( 08 ) via a coaxial to the second axis wheel drives. Apparatus according to claim 1, characterized in that the second drive motor ( 16 ) via a differential gear to the rotation of the first axis and to the rotation of the tool holder ( 08 ) is coupled. Device according to one of the preceding claims, characterized in that the at least one tool ( 09 ; 23 ; 24 ) a knife, in particular a perforating knife ( 09 ; 24 ). Device according to one of the preceding claims, characterized in that the tool holder ( 08 ) at least two tools ( 09 ; 23 ; 24 ) of different types. Device according to one of the preceding claims, characterized in that the processing point ( 05 ) A gap ( 05 ) between the roller ( 01 ) and an impression cylinder ( 06 ) Device according to one of the preceding claims, characterized characterized in that it is part of a folder or a rewinder is. Use of the device according to one of the preceding claims, in which the penetration depth of the tool ( 09 ; 23 ; 24 ) in the web ( 07 ) by adjusting the phase position to the thickness of the material web ( 07 ) is adjusted. Use of the device according to one of claims 1, 6 and 7, in which the second drive motor ( 16 ) is operated at a same first rotational speed in a tool operating mode and a tool non-operating mode, and for switching between tool operating and non-operating modes, the drive motor ( 16 ) is temporarily operated at a rotational speed other than the first rotational speed. Use according to claim 12 or 13, characterized in that the first rotational speed is chosen such that a rotational speed of the tool ( 09 ; 23 ; 24 ) about the first axis equal to the rotational speed of the first about the second axis ( 10 ). Device according to one of the preceding claims, characterized in that the tool holder ( 08 ) is divided over the width of the device at least 1 time. Apparatus according to claim 15, characterized in that the halves of the tool holder ( 08 ) of at least two in-phase or phase-differently operating drive motors ( 16 ) are rotated about the first axis.