EP0888241B1 - Verfahren zum aufwickeln einer bahn,insbesondere einer papier-oder kartonbahn - Google Patents
Verfahren zum aufwickeln einer bahn,insbesondere einer papier-oder kartonbahn Download PDFInfo
- Publication number
- EP0888241B1 EP0888241B1 EP96934846A EP96934846A EP0888241B1 EP 0888241 B1 EP0888241 B1 EP 0888241B1 EP 96934846 A EP96934846 A EP 96934846A EP 96934846 A EP96934846 A EP 96934846A EP 0888241 B1 EP0888241 B1 EP 0888241B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- web
- roll
- cut
- material strip
- face
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Definitions
- the invention concerns a method in winding of a web, in particular of a paper or board web, in which method the web is wound onto a roll spool through a nip between a roll and the roll spool.
- the machine reel produced in a paper machine is often slit into component webs in a slitter-winder, out of which component webs customer rolls or commercial rolls of desired width are formed.
- a slitter-winder In the commercial rolls formed in the slitter-winder, automatic fixing of the cutting point, i.e. the tail end of the web, to the full roll after winding and the fixing of the initial end of the web to the new roll spool are to-day ever more important properties in further processing of the paper.
- Ply separation of paper means that, while the paper is fixed by gluing onto the spool from one side, rigid paper and, especially, board grades tend to straighten themselves to their linear form present on the machine reel and are split starting from the end of the web, in which case the starting of winding can fail completely or a fold is formed on the bottom of the roll. It can also be difficult to find a correct degree of weakening of the web when paper grades of different strengths are run.
- a method comprising the features of the pre-characterizing clause of claim 1 is known from document US-A-5 092 533.
- this known method two strips of adhesive are applied to the web, and the web is weakened between the two strips of adhesive so that the web is cut off by tightening the web and tearing it at the weakened portion.
- the same problems are associated with this known method as are explained in the preceding paragraph in respect of the method according to document FI-B-91054.
- the object of the present invention is to provide a method in which the drawbacks of the prior-art solutions are not present and by whose means the ends of the web can be fixed automatically to the roll and to the spool, respectively, simply and reliably.
- a material strip with one adhesive face is fixed to the face of the web, the length of said material strip in the running direction of the web being larger than the distance between its fastening points, and the web is cut off at a suitable point between the fastening points. After this, the material strip with one adhesive face is cut off so that one of its parts fixes the final end of the web to the complete roll and the other part fixes the initial end of the web to a new roll spool.
- the slitter-winder is stopped for the roll change, and the material strip with one adhesive face, preferably a one-sided tape, is fixed to the face of the web from two zones separate from one another. After this, the web is cut off between the tape fixing points. Since the length of the tape in the running direction of the web is longer than the distance between the fastening points, "unused" tape remains between the ends of the cut-off web. A part of this tape is used for fixing the tail of the web to the roll, and the rest is used for fixing the web onto the new roll spool, respectively.
- the tape has been weakened in advance at the point at which it is supposed to be split between the fastening of the web tail and the fastening of the web onto the spool.
- the fixing by means of the method of the invention is reliable, because it is carried out across the cut-off area of the web, whereby the risk of ply separation is eliminated fully.
- Figure 1 is a schematic illustration of the stage of the method of the invention in which the slitter-winder has been stopped for the purpose of cutting off the web and fixing the tape.
- Figure 2 is a schematic illustration of the stage of the method of the invention in which the web is cut off.
- Figure 3 is a schematic illustration of the stage of the method of the invention in which the web has been cut off and the tape has been fixed between the final portion and the initial portion of the web.
- Figure 4A is a schematic illustration of an exemplifying embodiment of cutting off the tape and fixing the tape to the face of a full roll.
- Figure 4B is a schematic illustration of a second exemplifying embodiment of cutting off the tape and fixing the tape to the face of a full roll.
- Figure 5 is a schematic illustration of the stage in the method of the invention in which one part of the tape has fixed the final portion of the web to the face of the complete roll and the other part of the tape has fixed the initial portion of the web onto a new roll spool.
- the web W is wound over a roll 11 or equivalent onto the roll spool 13, around which a paper roll 12 is formed.
- the winding takes place through the nip N between the roll 11 and the paper roll 12.
- the web W has been stopped between the upper and lower holding members 24,25 of the web cutting and tape fixing equipment 23.
- the tape or equivalent material strip with one adhesive face, to be fixed to the web W is denoted with the reference numeral 22, and the web cutting blade with the reference numeral 21.
- the length Y (Fig. 3) of the tape is larger than the length X of the web portion that remains between the tape 22 fixing points 26,27, because the tape 22 has been bent into a curved or equivalent form.
- the web is moved in the direction S, in which case the tape 22 is tightened between its fixing points and becomes straight, the adhesive face being placed as the bottom face viewed in the direction of the figure.
- the nip is opened, i.e. the paper roll 12 shifted to a distance apart from the nip contact with the roll 11, and when the tape is between the roll 11 and the paper roll 12, it is cut off by means of the blade 31, the first part 22A of the tape 22 being guided onto the face of the paper roll.
- the first part 22A is pressed into contact with the face of the paper roll, whereby the final end of the web has been fixed.
- the tape 22 has been provided, for example, with a weakening, in which case, when the web W is tightened, the tape 22 is cut off at the weakening.
- the operations to be carried out after this are similar to those illustrated in Fig. 4A.
Landscapes
- Replacement Of Web Rolls (AREA)
Claims (4)
- Verfahren beim Aufwickeln einer Bahn, die insbesondere eine Papier- oder Pappbahn ist, wobei bei diesem Verfahren die Bahn (W) auf einer Rollenspule (13) durch einen Spalt (N) zwischen einer Walze (11) und der Rollenspule (13) aufgewickelt wird, wobei, wenn die in der Rollenspule (13) ausgebildete Rolle (12) vollendet ist, die Bahn so abgetrennt wird, dass ein Endabschnitt der Bahn (W) stromaufwärtig von der Abtrennlinie ausgebildet wird und ein Anfangsabschnitt der Bahn (W) stromabwärtig von der Abtrennlinie ausgebildet wird, und wobei der Endabschnitt der Bahn (W) an der Seite der vollendeten Rolle (12) mittels eines Haftmittels fixiert wird und das Anfangsende der Bahn (W) an einer Rollenspule (13B) mittels eines Haftmittels fixiert wird,
dadurch gekennzeichnet, dasswenn die an der Rollenspule (13) ausgebildete Rolle (12) vollendet wird und bevor die Bahn abgetrennt wird, ein Materialstreifen (22) mit einer Haftseite an der Bahn (W) an seinen Rändern quer zu der Laufrichtung (S) der Bahn (W) an Fixierstellen (26, 27) so fixiert wird, dass die Ränder des Materialstreifens (22) an der Bahn (W) an den Fixierstellen (26, 27) bei einem Abstand (X) zwischen den Fixierstellen in der Laufrichtung (S) der Bahn (W) angeordnet werden, der kürzer als die Länge (Y) des Materialstreifens (22) in der Laufrichtung (26, 27) der Bahn (W) ist,die Bahn (W) zwischen den Fixierstellen (26, 27) abgetrennt wird undder Materialstreifen (22) mit einer Haftseite abgetrennt wird und ein Abschnitt (22A) des abgetrennten Materialstreifens (22), der an dem Endabschnitt des zu der vollendeten Rolle (12) tretenden Bandes (W) fixiert war, den Endabschnitt der Bahn (W) an der Seite der vollendeten Rolle (12) fixiert, und der andere Abschnitt (22B) des Materialstreifens (22), der an dem Anfangsende der Bahn (W) fixiert worden ist, die Bahn (W) an der neuen Rollenspule (13B) für den Start des Wickelns einer neuen Rolle fixiert. - Verfahren gemäss Anspruch 1,
dadurch gekennzeichnet, dass
der Materialstreifen (22) mittels einer Klinge (31) abgetrennt wird. - Verfahren gemäss Anspruch 1,
dadurch gekennzeichnet, dass
der Materialstreifen (22) mit einem abgeschwächten und vorzugsweise perforierten Abschnitt versehen ist, an dem der Materialstreifen (22) durch ein Straffziehen der Bahn (W) und des Materialstreifens (22) abgetrennt wird. - Verfahren gemäss einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass
der Abschnitt (22A) des Materialstreifens (22), der an der Seite der vollendeten Rolle (12) fixiert worden ist, zu einem Kontakt mit der Seite der vollendeten Rolle (12) mittels eines Andrückelementes (32) gedrückt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002239185A CA2239185C (en) | 1995-10-04 | 1996-10-22 | Method in winding of a web, in particular of a paper or board web |
PCT/FI1996/000558 WO1998017564A1 (en) | 1995-10-04 | 1996-10-22 | Method in winding of a web, in particular of a paper or board web |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0888241A1 EP0888241A1 (de) | 1999-01-07 |
EP0888241B1 true EP0888241B1 (de) | 2002-03-27 |
Family
ID=25680263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96934846A Expired - Lifetime EP0888241B1 (de) | 1996-10-22 | 1996-10-22 | Verfahren zum aufwickeln einer bahn,insbesondere einer papier-oder kartonbahn |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0888241B1 (de) |
-
1996
- 1996-10-22 EP EP96934846A patent/EP0888241B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0888241A1 (de) | 1999-01-07 |
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