DE102022109965A1 - Method and reel changer for a flying reel change as well as substrate handling and/or processing machine with a reel changer - Google Patents

Abstract

When changing rolls according to the invention, a first substrate web is unwound via a substrate path from a first substrate roll and conveyed at a web speed into a machine that processes and/or processes the substrate web, a second substrate roll with a second substrate web wound on it, which is in the area of the circumference lying beginning of the web comprises an adhesive, accelerated to a peripheral speed corresponding to the web speed of the first substrate web, and for materially connecting the first to the second substrate web, the first substrate web is brought into contact with the adhesive provided on the circumference of the second substrate roll. According to the invention, a weakening line that does not completely cut through the first substrate web is introduced in the substrate path upstream of the contact point of the first substrate web with the second substrate roll and/or before the first substrate web comes into contact with the adhesive on the second substrate roll and after the introduction of the weakening line, but at the earliest upon contact of the first substrate web with the adhesive upstream of the already formed or yet to be formed contact point between the first substrate web and the second substrate roll in the substrate path, a force directed opposite to the web travel is introduced into the first substrate web. The invention further relates to a reel changer for on-the-fly reel changing and a substrate handling and/or processing machine with such a reel changer

Description

The invention relates to a method and a reel changer for a flying, i.e. H. uninterrupted roll change and a substrate handling and/or processing machine with a roll changer according to the preamble of claims 1, 7 and 15, respectively.

Through the DE 10 2013 219 259 A1 is a web printing machine disclosed with at least one printing unit, through which a substrate web can be printed at least on one side without a printing plate using a digital printing process, and with an unwinder arranged upstream of the printing unit in the substrate web path, from which the substrate web to be printed can be unwound from a substrate roll, the unwinder being used for receiving at least two substrate rolls and is designed to carry out a flying roll change.

The DE 10 2016 225 980 A1 discloses a reel changer with a device for cutting off a substrate web flag, which is created behind the splice after a new one has been glued to a web that is currently unrolling. In this case, the substrate web is subjected to an air flow downstream of the gluing on the side of the substrate web flag in the transport direction and is guided past a conveyor element which accelerates the substrate web flag in a frictional manner relative to the remaining substrate web in the transport direction and the substrate web flag, which has been lifted off the substrate web in this way, is cut off by a knife following downstream.

The invention is based on the object of providing a method and a reel changer for a flying, i.e. H. to create uninterrupted roll changes as well as a substrate handling and/or processing machine with a roll changer.

The object is achieved according to the invention by the features of claims 1, 7 and 15, respectively.

It is of particular advantage that the roll changer or roll changer according to the invention increases the product range with regard to the substrate to be processed and/or its thickness and/or reduces the risk of substrate-related disturbances in units of a machine comprising the roll changer.

Not only, but particularly advantageously, the invention is in connection with, for example, substrate materials that are stiffer and/or thicker than conventional papers, such as those found, for example. B. are used in packaging printing and/or when processing cardboard.

As part of a flying roll change, a first substrate web is unwound from a first substrate roll via a substrate path and conveyed at a web speed into a machine that handles and/or processes the substrate web, a second substrate roll with a second substrate web wound on it, which is in the area of the Circumferential web beginning comprises an adhesive, accelerated to a peripheral speed corresponding to the web speed of the first substrate web, and for materially connecting the first to the second substrate web, the first substrate web is brought into contact with the adhesive provided on the circumference of the second substrate roll. According to the invention, in the substrate path upstream of the contact point of the first substrate web with the second substrate roll and/or before the contact of the first substrate web with the adhesive on the second substrate roll, a weakening line which does not completely cut through the first substrate web, in particular a creasing or preferably embossing line, is introduced and after the introduction of the line of weakness, but at the earliest when the first substrate web comes into contact with the adhesive upstream of the contact point that has already been formed or is yet to be formed between the first substrate web and the second substrate roll, in particular by introducing a deflection element into the substrate path and/or preferably by spontaneously decelerating the peripheral speed of the first roller, a force directed opposite to the web run is introduced into the first substrate web in the substrate path.

A z. B. for the above-mentioned method, a roll changer for a flying roll change that is particularly suitable includes a first roll position for receiving at least a first substrate roll with a first substrate web that is currently being unrolled and a second roll position for receiving a second substrate roll with a roll that is to be connected to the first substrate web, in the area of the beginning of the web a second substrate web having an adhesive, a web guiding element which determines the substrate path of a first substrate web to be unrolled, over which a substrate web to be unwound from a substrate roll can be guided, and a pressure roller movably arranged on one side of the substrate path of a first substrate web to be unrolled upstream of the web guiding element, through which a The first substrate web guided on the substrate path can be pressed against the lateral surface of a second substrate roll arranged on the second roller location. According to the invention, a device designed, for example, as a creasing or preferably as a perforating cylinder for introducing a weakening line is provided on the substrate path upstream of the movable pressure roller, which is in effective contact with a first substrate web guided on the substrate path can be brought and through which a weakening line that does not completely cut through the substrate material can be introduced into a first substrate web guided on the substrate path over the width of which.

A substrate processing and/or processing machine according to the invention, in particular designed as a printing machine for printing substrates formed by packaging materials and/or cardboard webs, comprises an input-side reel changer from which web-shaped substrate can be unrolled and inserted into the machine and at least one preferably as an inkjet printing unit designed printing unit, the roll changer being designed in the manner mentioned above with a device for introducing a weakening line.

Further advantageous refinements and further developments can be found in the following statements and the subclaims.

Embodiments of the invention are shown in the drawings and are described in more detail below.

• 1 eine schematische Darstellung einer als Rollendruckmaschine ausgebildeten substratbe- und/oder verarbeitenden Maschine mit einem Rollenwechsler und einer Einrichtung zum Schwächen des Substratmaterials;
• 2 eine Prinzipdarstellung des Rollenwechslers und der Einrichtung zum Einbringen einer Schwächungs- bzw. Sollbruchlinie in einer Ausgangslage vor einer beabsichtigten Klebung;
• 3 die Verbindung einer neuen mit einer alten Substratbahn aus dem Stand der Technik mit Restfahne;
• 4 eine schematische Draufsicht auf eine Substratbahn mit einer als Perforierlinie ausgeführten Schwächungslinie;
• 5 ein Beispiel für eine Sequenz von Prinzipdarstellungen für einzelne, einer Ausgangslage aus 4 nachfolgende Stadien während eines im Rahmen eines Rollenwechsels erfolgenden Klebe- und Trennvorgangs mit a) einem Synchronisieren zwischen den Umfangslagen eines als Perforierzylinder ausgebildeten Bearbeitungswerkzeuges und der Lage des Klebemittel an der neuen Rolle, b) einem Aufsetzen einer Klebewalze und einem Anstellen des Perforierzylinders, c) dem Einbringen einer Perforierlinie in die alte Substratbahn, d) einer Momentaufnahme zwischen dem Perforier- und dem Klebeprozess, e) einem Durchtrennen der alten Substratbahn an der Perforierlinie durch Verzögerung des zur Perforierlinie stromaufwärtigen Teils der alten Substratbahn, f) einem zum Verzögern alternativen oder zusätzlichen Beaufschlagen einer Zugkraft durch Einbringen eines Auslenkelementes in den Substratpfad;
• 6 ein erstes Ausführungsbeispiel für den Rollenwechsler mit einer Einrichtung zum Einbringen einer Schwächungs- bzw. Sollbruchlinie;
• 7 ein zweites Ausführungsbeispiel für den Rollenwechsler mit einer Einrichtung zum Einbringen einer Schwächungs- bzw. Sollbruchlinie.

Show it:

• 1 a schematic representation of a substrate processing and/or processing machine designed as a web printing machine with a roll changer and a device for weakening the substrate material;
• 2 a schematic representation of the roll changer and the device for introducing a weakening or predetermined breaking line in a starting position before an intended gluing;
• 3 the connection of a new with an old substrate web from the prior art with residual flag;
• 4 a schematic top view of a substrate web with a weakening line designed as a perforation line;
• 5 an example of a sequence of basic representations for individual, one initial situation 4 subsequent stages during a gluing and separating process that takes place as part of a roll change with a) synchronizing between the circumferential positions of a processing tool designed as a perforating cylinder and the position of the adhesive on the new roll, b) placing an adhesive roller and turning on the perforating cylinder, c) the introduction of a perforating line into the old substrate web, d) a snapshot between the perforating and the gluing process, e) a cutting of the old substrate web at the perforating line by delaying the part of the old substrate web upstream of the perforating line, f) an alternative or additional delay Applying a tensile force by introducing a deflection element into the substrate path;
• 6 a first embodiment of the roll changer with a device for introducing a weakening or predetermined breaking line;
• 7 a second embodiment of the roll changer with a device for introducing a weakening or predetermined breaking line.

A substrate loading and/or processing machine 01, in particular printing machine 01, particularly preferably printing machine 01 for printing packaging materials and/or cardboard webs, comprises a roll carrier 02 on the input side, e.g. B. a roll unwinder 02, from which web-shaped substrate B; B', e.g. B. a substrate web B; B' from a substrate roll 03; 03', for example printing material roll 03; 03`, short roll 03; 03 ', can be unrolled and inserted into the machine 01. In principle, the machine 01 can be designed as a wrapping and/or cutting machine and can only be used for wrapping and/or longitudinally cutting longitudinal strips. However, at least one processing stage 04, e.g. B. an embossing unit 04 and/or a foiling unit 04 and/or a laminating unit 04 and/or preferably at least one printing unit 04 is provided. The machine 01 is preferably designed as a web printing machine 01 and has at least one processing stage 04 designed as a printing unit 04 for at least one-sided printing of a substrate web B; B' on. Alternatively, it can be designed as a sheet-fed printing machine, which has a web-shaped substrate B on the input side; B 'can be fed, which can be cut downstream into substrate sections and the latter can be printed by at least one printing unit 04 designed as a sheet-fed printing unit.

The substrate web B; B' can z. B. basically be formed from any flat material which is accessible to the relevant processing provided in the machine 01. The substrate web B; B' can z. B. as plastic film B; B' or as metal foil B; B' must be executed. Preferably the substrate web is B; B', however, as a paper-based substrate web B; B' with, for example, a basis weight of more than 100 g/m ² , e.g. B. between 100 and 600 g/m ² , e.g. B. as paper web B; B' or in particular cardboard web B; B' with, for example, a basis weight of more than 250 g/m ² and/or a basis weight of at least 250 g/m ² . Such a paper web B; B' or cardboard sheet B; B' can consist of two or more connected ones, e.g. B. layers can be formed when wet pressed together ("guttered") during production and / or can be used as cover paper, for example, in the production of corrugated cardboard.

The roll unwinder 02 on the input side is equipped with several roll spaces and is used as a roll changer 02, in particular as a flying one, i.e. H. Roll changer 02 that enables uninterrupted roll changes is formed.

The at least one printing unit 04 can in principle be designed as an offset printing unit, as a gravure printing unit, as a letterpress printing unit, but is preferred as one using a non-impact printing process, i.e. H. Printing unit 04 operating without a fixed printing form, in particular as a printing unit 04 operating without a printing form using a digital printing process. In particular, the web-fed printing press 01 preferably comprises at least one printing unit 04, which operates without a printing form, with one or in particular several inkjet print heads 06, for example at least one inkjet printing unit 04. The inkjet printing unit 04 provides the printing material with a printing motif without a fixed repeat length and/or with individual and/or changing print images. Contents printable. This can have particular advantages in packaging printing, especially when printing small quantities of cardboard blanks and/or individualized printed image components.

Output side of machine 01, i.e. H. along the substrate web path downstream of the roll unwinder 02 and preferably the processing stage 04, in particular the at least one printing unit 04, a continuation to a further processing stage, for example to a machine part for inline processing of the substrate web B; B' as a use of cardboard blanks to be produced in the machine 01 or for inline processing of the substrate web B; B 'can be provided as a cover sheet for a corrugated cardboard to be produced in the machine 01. Alternatively - as shown here - a further roller carrier 07 can be provided instead, through which the substrate web B; B 'to a winding or in particular product roll 08; 08' forming substrate roll 08; 08`, short roll 08; 08`, can be wound up. The output-side roller carrier 07, e.g. B. roll winder 07, is preferably also equipped with several roll spaces and z. B. as a so-called reversible winder 07, in particular as a reversible winder 07 that enables a flying winding roll change. The substrate web B; B ', the machine 01 passes between the roll unwinder 02 and the rewinder 07, projected horizontally along a production direction P.

In the case of producing a product designed as a corrugated cardboard web, the printed material web B; B' as an intermediate product is also connected inline or in a subsequent processing process in a corresponding further processing stage with a wave track - possibly already connected to an inner ceiling. However, in principle, only the printed material web B; B' can be produced.

In addition to the at least one printing unit 04, one or more further printing units 04 and/or other units 09, e.g. B. at least one dryer 09, in particular radiation dryer 09, may be provided in the printing material path.

In advance of a flying role change, a current, e.g. B. first substrate web B is unwound from the substrate roll 03 and guided into the machine 01 on the input side. In the area of the beginning of the track one on a new or different one, e.g. B. second substrate roll 03 'wound new or second substrate web B' is or is a connecting means 11, e.g. B. adhesive 11, in particular a z. B. axially parallel adhesive strip 11 is provided, which - if necessary after appropriate preparation - has an outward-facing adhesive surface. Should, e.g. B. because the current, e.g. B. first substrate roll 03 is used up or for other reasons, processing with this new or other, e.g. B. second substrate roll 03' are continued, the new or second substrate web B' of the new or second substrate roll 03' and the old or first substrate web B of the currently running first substrate roll 03 are brought into contact with one another, via the on Circumference of the new substrate roll 03 'provided connecting or adhesive 11 at a connection point 12, z. B. splice 12 is cohesively connected to one another, and then the substrate web B, which was still unwound until then, is severed in the area or upstream behind the splice 12. When separated, a more or less long so-called residual flag 13 usually remains (for example in 3 shown in dashed lines).

In contrast to known procedures, according to which the previously running first substrate web B is cut by a cut-off knife during the gluing process upstream of the gluing point 12, here this takes place in the substrate path upstream of the contact point and/or before the old substrate web B comes into contact with the one on the new or . Second substrate web B 'circumferential adhesive 11 a weakening of the substrate material of the old or first substrate web B along a - z. B. in sections or continuously - across the width of the old substrate web B running weakening line 14 (see, for example, schematically in 4 ), e.g. B. Predetermined breaking line 14, along which the old or first substrate web B tears off as a result of a tensile load, ie is severed. The tensile load occurs in that after the predetermined breaking line 14 has been introduced, a force directed opposite to the path of the web is introduced into the part of the first substrate web B upstream of the adhesive point 12 at the earliest when the first substrate web B comes into contact with the adhesive 11 upstream of the cohesive connection. The weakening or predetermined breaking line 14 can fundamentally deviate in shape from a straight line, but preferably runs in a straight line and in particular perpendicular to the longitudinal edges of the web.

The initiation of the tensile load or the web running, i.e. H. The force directed against the web feed can in principle be carried out in any suitable manner. For example, by deflecting the substrate web B and / or introducing a deflection element 24, e.g. B. a deflection roller 24 to be introduced into the substrate path or a knock-off tool 24, an increase in the travel path in the substrate path of the first substrate web B between the place where the first substrate roll 03 runs off and the current position of the connection point 12.

In the preferred embodiment set out below, however, after the predetermined breaking line 14 has been introduced, but at the earliest when the first substrate web B comes into contact with the adhesive 11 provided on the circumference of the second substrate roll 03', the peripheral speed of the first substrate roll 03 is compared to that before and/or at the The peripheral speed present on the second substrate roll 03` is reduced. In particular, the peripheral speed is reduced in that the drive means which rotationally drive the first substrate roll 03, e.g. B. one or two front drive motors, the operating speed can be reduced or preferably stopped. Additionally or instead, the reduction or stopping of the roller peripheral speed can be supported or effected by a brake.

• Um den Klebevorgang einzuleiten, wird die erste Substratbahn B und die das Klebemittel 11 aufweisende Mantelfläche der zweiten Substratrolle 03` miteinander in Berührkontakt verbracht. Obgleich das Inkontaktbringen auch durch Bewegen der zweiten Substratrolle 03` bewirkt werden könnte, erfolgt dies bevorzugt durch eine Andrückwalze 16, z. B. eine sog. Klebewalze 16, die die erste Substratbahn B bei entsprechender Bewegung der Andrückwalze 16 in Richtung zweiter Substratrolle 03` von hinten gegen die Mantelfläche der zweiten Substratrolle 03` drückt. Die Andrückwalze 16 ist hierzu durch ein Stellmittel an die zweite Substratrolle 03` anstellbar.

The above-mentioned procedure for flying role changes is preferably carried out in some or all of the steps set out below:

• In order to initiate the gluing process, the first substrate web B and the lateral surface of the second substrate roll 03' containing the adhesive 11 are brought into contact with one another. Although the contacting could also be effected by moving the second substrate roll 03', this is preferably done by a pressure roller 16, e.g. B. a so-called adhesive roller 16, which presses the first substrate web B from behind against the lateral surface of the second substrate roll 03' when the pressure roller 16 moves accordingly in the direction of the second substrate roll 03'. For this purpose, the pressure roller 16 can be adjusted to the second substrate roll 03' using an adjusting means.

After, before or preferably with the pressing of the first substrate web B onto the lateral surface, but in particular before the adhesive 11 enters the contact zone between the second substrate roll 03' and the first substrate web B, one of the adhesive rollers 16 in the substrate path upstream and optionally is turned on the device 17 introducing the weakening or predetermined breaking line 14, e.g. B. a - preferably individually motor driven - processing cylinder 17, in particular creasing or preferably perforating cylinder 17, against an abutment 18, e.g. B. a web guide element 18 designed as a roller 18, in particular one that changes the direction of travel, preferably with an elastomer such as. B. Vullkolan® coated roller 18, in particular deflection roller 18. The device 17, designed as a creasing or preferably perforating cylinder 17, has on the circumference at least one tool 19, e.g., which extends over the substrate width and weakens the material. B. a creasing or preferably perforating tool 19. The roller 18 can have a die that is complementary to the tool 19 in question on the circumference. The processing cylinder 17 can be adjusted to the abutment 18 by an adjusting means.

With, after or preferably before the processing cylinder 17 introducing the predetermined breaking line 14 is turned on (see e.g. 5a) ) against the roller 18, the current angular position of the tool 19 on the processing cylinder 17 is synchronized with that of the adhesive 11 on the new substrate roll 03` and/or its peripheral speed in such a way that the predetermined breaking line 14 to be introduced is just with the rear, ie the trailing end of the The connection point 12 formed by the adhesive 11 coincides or is at least only slightly behind it, ie for example at most 50 mm, in particular at most 30 mm. The synchronization takes place in particular taking into account the distance to be covered by the predetermined breaking line 14 to the contact zone and the circumferential section length to the contact zone that still needs to be covered by the adhesive 11 to the contact zone. With a known relative position between the position of the adhesive 11 on the new substrate roll 03` and an angular position of the roller drive on the one hand and a known relative position between the position of the tool 19 on the processing cylinder 17 on the other hand, synchronization can be carried out by comparing respective encoder signals from angular position encoders in or on Roller drive and in or on a separate drive of the processing cylinder 17. The first substrate roll 03 The rotationally driving drive means and the drive of the processing cylinder 17 can preferably be operated mechanically independently of one another, in particular by separate drive means, e.g. B. drive motors.

After the processing cylinder 17 has been synchronized with the position and/or speed of the adhesive 11 and the processing cylinder 17 and possibly also the pressure roller 16 have already been turned on (see, for example, 5b) ), with the next pass of the tool 19 through the nip point with the roller 18, the substrate material of the first substrate web B is weakened, for example grooved or in particular perforated, along the predetermined breaking line 14 (see, for example, 5c )). In the particularly advantageous case of perforating, this is done in such a way that only 5 to 25%, preferably 10 to 20%, of the predetermined breaking line 14 remains as webs.

After the predetermined breaking line 14 on the one hand and the adhesive 11 on the other hand have approached the contact zone between the first substrate web B and the second substrate roll 03' (see e.g. 5d )) During the subsequent passage of the adhesive 11 through the nip point of the second substrate roll 03` with the pressure roller 16, the old and the new substrate web B; B 'connected to one another via the splice 12, with the predetermined breaking line 14 coming to lie just at the end of the splice 12 or at most at the slightest distance behind it (see e.g. 5e) ). This avoids a longer residual flag 13 that wanders uncontrollably as it continues to run through the machine.

Preferably during the nipping passage of the adhesive 11 or the gluing point 12 or possibly after leaving the nipping point, in particular with the adhesive roller 16 turned off again, the above-mentioned force, which is directed against the path of the web, is introduced into the part of the first substrate web B upstream of the gluing point 12, in that in the present exemplary embodiment the circumferential speed of the first substrate roll 03 is reduced compared to the circumferential speed present before and/or on the second substrate roll 03`. This is done, for example, by reducing the target drive speed or preferably by initiating a drive stop, in each case possibly supported by an additionally provided brake. Due to the higher tensile stress arising in the first substrate web B, the substrate web B tears off at the predetermined breaking point.

A roll changer 02, through which the above-mentioned Method for on-the-fly roll change can be carried out, is with several roll places for receiving several, in particular at least one first in the above sense and a second substrate roll 03; 03` trained. The two roll positions are stored in a frame 21 of the roll changer 02. Preferably, the roller locations or substrate rollers are 03; 03` on a common support frame 22, e.g. B. also referred to as a swivel frame 2 2, which is pivotable about a swivel axis S that is axially parallel to the roller axes and has the two or plurality of roller positions distributed on a circular ring around the swivel axis S. In the substrate path of a substrate web B to be led into the machine 01; B 'is at least one web guide element 23, in particular mounted fixed to the frame, e.g. B. a guide or deflection roller 23 is provided, via which the substrate roll 03; 03` currently unrolled substrate web B; B' is guided or can be guided. On a substrate path of a first substrate web B that is currently being unrolled, an adjustable roller 18 is provided between the relevant first substrate roll 03 and the guide roller 23, through which a first substrate web B guided on the substrate path can be pressed against the lateral surface of a second substrate roll 03' arranged on a second roller location is. Furthermore, a processing cylinder 17 is provided on this substrate path upstream of the adjustable roller 18, which can be brought into effective contact with a first substrate web B guided on the substrate path and through which a predetermined breaking line 14, in particular, which does not completely cut through the substrate material, is inserted into a substrate web B guided on the substrate path in the form of a groove 14 or preferably perforation 14, can be introduced. Depending on the design, the processing cylinder 17 then carries z. B. a creasing or perforating tool 19.

A roller 18 which serves as an abutment 18 for the processing cylinder 17 in the active state is preferably provided on the other side of the substrate path. This roller 18 can in principle be mounted fixed to the frame, but is preferably arranged on the support frame 22 and can be pivoted with it.

In order to be able to take different roll sizes into account, in an advantageous development the processing cylinder 17 is not mounted in a fixed position in the frame 21 of the roll changer 02, but its position in the roll changer 02 can be changed - in particular along a circular arc running around the pivot axis S.

In an advantageous first embodiment variant (see e.g. 6 ) can also be mounted on the pivotable support frame 22 - preferably opposite the roller 18, which is also arranged on the support frame 22, with respect to the substrate path. In this version variant, the processing cylinder 17 automatically always assumes the correct starting position relative to the roller 18, but may possibly cause a restriction in the movements of the support frame 22 during operation.

In a second embodiment variant (see e.g. 7 ) the processing cylinder 17, which can be selectively adjusted to the abutment 18, is mounted in a variable position on the frame 21 of the roll changer 02 in addition to the adjusting movement in a different radial direction. It is preferred, together with the means that enable the adjusting movement, e.g. B. stored in a guide 26 along a circular arc section running around the pivot axis S in or on the frame 21.

Regardless of the location and type of storage, the processing cylinder 17 is mounted by a drive means on the roller 18 forming the abutment 18 and can be turned off therefrom - e.g. B. relative to a bearing on the frame 21 or relative to a bearing on the support frame 22.

In a further development, the separation process can, in addition to reducing the circumferential speed, be carried out by simply in 5f) Deflection element 24 indicated by an arrow, e.g. B. a roller to be inserted into the substrate path or a knock-off tool to be inserted can be supported, which is arranged on one side of the substrate path and can be moved from a rest position lying outside the substrate path into an active position in which the old substrate web B is upstream of the Adhesive point 12 deflects towards the other side of the substrate path. The above-mentioned tensile stress is further increased.

In an alternative to separation as a result of a spontaneous reduction in peripheral speed, the separation process can be carried out solely by the in 5f) Deflection element 24, indicated only by an arrow, e.g. B. as above, a roller to be introduced into the substrate path or a corresponding knock-off tool to be introduced can be effected or be. This is then z. B. arranged and effective as described above.

Reference symbol list

01

Machine, printing machine, web printing machine

02

Roll carrier, roll unwinder, roll changer

03

Substrate roll, substrate roll, paper roll, roll

04

Processing stage, embossing unit, foiling unit, laminating unit, printing unit, printing formless, inkjet printing unit

05

-

06

Inkjet print head

07

Roll carrier, roll winder, reversible winder

08

Substrate roll, product roll, roll

09

Aggregate, dryer, radiation dryer

10

-

11

Fasteners, adhesives, adhesive strips

12

connection point, glue point

13

Residual flag

14

Weakening line, predetermined breaking line, creasing, perforation

15

-

16

Pressure roller, adhesive roller

17

Device for introducing a weakening line, processing cylinder, creasing cylinder, perforating cylinder

18

Abutment, web guide element, roller, deflection roller

19

Tool, creasing tool, perforating tool

20

-

21

frame

22

Support frame, swing frame

23

Web guide element, guide roller, deflection roller

24

Deflection element, deflection roller, knock-off tool

25

-

26

guide

03`

Substrate roll, printing material roll, roll

08`

Substrate roll, product roll, roll

b

Substrate, substrate web, plastic film, metal foil, paper web, cardboard web

B'

Substrate, substrate web, plastic film, metal foil, paper web, cardboard web

S

Pivot axis

P

Production direction

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102013219259 A1 [0002]
• DE 102016225980 A1 [0003]

Claims (15)

Method for a flying roll change, wherein - a first substrate web (B) is unwound from a first substrate roll (03) via a substrate path and conveyed at a web speed into a machine (01) which processes and/or processes the substrate web (B), - a second substrate roll (03`) with a second substrate web (B`) wound on it, which comprises an adhesive (11) in the area of the beginning of the web on the circumference, is accelerated to a peripheral speed corresponding to the web speed of the first substrate web (B), - and for materially connecting the first to the second substrate web (B; B'), the first substrate web (B) is brought into contact with the adhesive (11) provided on the circumference of the second substrate roll (03`), characterized in that - in the substrate path upstream of the contact point of the first substrate web (B) with the second substrate roll (03`) and/or before the contact of the first substrate web (B) with the adhesive (11) on the second substrate roll (03`) a the first substrate web (B) a weakening line (14) that does not completely cut through is introduced, - and after the introduction of the weakening line (14), however, at the earliest when the first substrate web (B) comes into contact with the adhesive (11) upstream of the contact point that has already been formed or is yet to be formed between the first substrate web (B ) and second substrate roll (03`) a force directed opposite to the path of the web is introduced into the first substrate web (B). Procedure according to Claim 1 , characterized in that the introduction of the force directed opposite to the web running is brought about by a reduction in the peripheral speed of the first substrate roll (03) compared to the web speed present up to that point and/or compared to the peripheral speed present on the second substrate roll (03`). Procedure according to Claim 1 or 2 , characterized in that the introduction of the force directed opposite to the path of the web is introduced by introducing a deflection element (26) into the substrate path and a resulting increase in the travel path in the substrate path of the first substrate web (B) between the first substrate roll (03) and the contact point of the first Substrate web (B) is effected or supported with the second substrate roll (03`). Procedure according to Claim 1 , 2 or 3 , characterized in that the line of weakness (14) is effected by a processing cylinder (17) which has a tool (19) on the circumference which introduces the line of weakness (14), and that the current angular position is synchronized before the line of weakness (14) is introduced of the tool (19) on the processing cylinder (17) with that of the adhesive (11) on the second substrate roll (03`) to a certain relative position between the weakening line (14) to be created on the first substrate web (B) and the angular position of the adhesive ( 11) on the second substrate roll (03`). Procedure according to Claim 4 , characterized in that the synchronization takes place in such a way that the weakening line (14) to be introduced coincides exactly with the rear end of the connection point (12) to be formed by the adhesive (11) or lies only slightly, ie at most 50 mm, behind this end comes. Procedure according to Claim 1 , 2 , 3 , 4 or 5 , characterized in that a perforation (14) is introduced into the first substrate web (B) as a weakening line (14) and/or that the first substrate web (B) is connected by a pressure roller (16) to the second substrate roller (03`) and the Adhesive (11) is brought into contact. Roll changer for a flying roll change - with a first roll location for receiving at least a first substrate roll (03) with a first substrate web (B) that is currently being unwound and with a second roll location for receiving a second substrate roll (03`) with a first substrate web (B ) to be connected, with an adhesive (11) in the area of the beginning of the web, - with a web guide element (23) which determines the substrate path of a first substrate web (B) that is currently being unrolled, via which a substrate roll (03) to be unwound Substrate web (B) can be guided, - and with a pressure roller (16) movably arranged on one side of the substrate path of a first substrate web (B) to be unwound upstream of the web guiding element (23), through which a first substrate web (B) guided on the substrate path is against the The lateral surface of a second substrate roll (03`) arranged on the second roller place can be pressed, characterized in that a device for introducing a weakening line (14) is provided on the substrate path upstream of the movable pressure roller (16), which is in effective contact with one guided on the substrate path first substrate web (B) can be brought and through which into a first substrate web (B) guided on the substrate path the width of which can be introduced into a weakening line (14) which does not completely cut through the substrate material. Roll changer after Claim 7 , characterized in that the device (17) introducing the line of weakness (14) is formed by a processing cylinder (17) which interacts with a web guiding element (18) forming an abutment (18) via a first substrate web (B) guided on the substrate path . Roll changer after Claim 8 , characterized in that the roller locations are provided on a common support frame (22), which can be pivoted about a pivot axis (S) that is axially parallel to the roller axes and carries the web guide element (18) forming the abutment (18). Roll changer after Claim 8 or 9 , characterized in that the processing cylinder (17) is mounted on a frame (21) so that it can be changed in position in a radial direction that deviates from the direction of the adjusting movement. Roll changer after Claim 9 , characterized in that the processing cylinder (17) is also mounted on the support frame (22) and can be pivoted with it. Roll changer after Claim 8 , 9 , 10 or 11 , characterized in that the first substrate roll (03) rotationally driving drive means and the drive of the processing cylinder (17) can be operated mechanically independently of one another. Roll changer after Claim 8 , 9 , 10 , 11 or 12 , characterized in that control means are provided by which a drive of the first substrate roll (03) is triggered to cause the adhesive (11) arranged on the second substrate roll (03`) to pass through the pressure roller (16) and the second substrate roll (03`). ) formed nip point can be delayed with respect to the peripheral speed. Roll changer after Claim 7 , 8th , 9 , 10 , 11 , 12 or 13 , characterized in that on the substrate path in front of the nip point between the pressure roller (16) and the second substrate roll (03`), a deflection element (24) which causes or supports a separation of the first substrate web (B) along the line of weakness (14) is provided, which is on a Side of the substrate path is arranged and can be moved from a rest position lying outside the substrate path into an active position in which it deflects the first substrate web (B) upstream of the nip point between the pressure roller (16) and the second substrate roller (03 ') towards the other side of the substrate path . Substrate handling and/or processing machine (01) with an input-side reel changer (02), from which web-shaped substrate (B; B') can be unwound and inserted into the machine (01), and at least one printing unit (04), characterized by the Design of the roll changer according to one of the Claims 7 until 14 .

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