EP0953531A1 - Procédé de régulation de la densité de bobinage de rouleaux de film - Google Patents

Procédé de régulation de la densité de bobinage de rouleaux de film Download PDF

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Publication number
EP0953531A1
EP0953531A1 EP99104856A EP99104856A EP0953531A1 EP 0953531 A1 EP0953531 A1 EP 0953531A1 EP 99104856 A EP99104856 A EP 99104856A EP 99104856 A EP99104856 A EP 99104856A EP 0953531 A1 EP0953531 A1 EP 0953531A1
Authority
EP
European Patent Office
Prior art keywords
film
winding
winding density
thickness
determined
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.)
Withdrawn
Application number
EP99104856A
Other languages
German (de)
English (en)
Inventor
Robert Dr. Schmidt
Dieter Mathieu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trespaphan GmbH and Co KG
Original Assignee
Hoechst Trespaphan GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hoechst Trespaphan GmbH filed Critical Hoechst Trespaphan GmbH
Publication of EP0953531A1 publication Critical patent/EP0953531A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B65H23/195—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in winding mechanisms or in connection with winding operations
    • B65H23/1955—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in winding mechanisms or in connection with winding operations and controlling web tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • B65H18/26—Mechanisms for controlling contact pressure on winding-web package, e.g. for regulating the quantity of air between web layers

Definitions

  • the invention relates to a method for regulating the winding density of film rolls.
  • the winding density of the machines or Foil roll at a central point In the film manufacturing process, the winding density of the machines or Foil roll at a central point.
  • a certain amount of air between the individual layers is absolutely necessary to enable the film to shrink when storing the film roll before assembly and to compensate for profile irregularities. If a film web that is in and of itself in accordance with specifications is wound incorrectly, the film roll may be totally lost due to damage to the film web, in particular due to storage. In this connection, the phenomenon is to be seen that when the film web is wound, considerable amounts of air are also wrapped in the film roll.
  • a device for winding a film web onto a winding core which has a contact roller, via which the film web is fed to the film winding.
  • the contact roller and the film roll run in opposite directions at the same peripheral speed.
  • the contact roller has a smooth, hard surface layer that has an average roughness value R a ⁇ 0.4 ⁇ m and a Brinelle hardness> than 10 HP 2.5 / 62.5.
  • the roller resting on the contact roller is arranged in a stationary manner during the winding process and is pressed against the contact roller.
  • both cylinders are attached to a contact roller holder.
  • the roller lying against the film roll is movably supported and guided by being connected to a cylinder which is rotatably supported on a joint on the contact roller holder.
  • a spacer is rotatably mounted in the joints of the axle rollers and connects the two rollers to one another and keeps them at a distance from one another.
  • the object of the invention is to provide a method for regulating the winding density of film rolls create in which the winding density is as large as possible without causing stretching and this leads to quality restrictions.
  • the object is achieved in such a way that a desired value of the winding density Wd should be calculated from the current profile quality dimension R w , the longitudinal film shrinkage S, the air gap L and the average film density D with an actual value of the winding density, calculated from the winding outside diameter D, core diameter d, the air length l and the average film density D , are compared with one another in a controller, and the calculated control output y compensates for the control deviation via the control variables film tension and contact pressure.
  • the control output y calculated by the controller is dependent on the run length Multiplied adjustment factor ⁇ , which is only less than 1 near the winding core diameter.
  • the desired value of the winding density Wd soll is according to the relationship determined, the profile quality R w and the average film thickness D determined by means of an in-line measurement and the longitudinal shrinkage S and the air gap L are specified.
  • the actual value of the winding density Wd ist is according to the relationship determined, where l is the run length of the wound film, D is the corresponding outer diameter of the roll and d is the core diameter.
  • the measure for the profile quality R w is given by with the maximum thickness D max , minimum thickness D min and the average thickness D the current transverse thickness profile of the respective film.
  • the shrinkage / retardation behavior takes into account the storage time, storage temperature, the longitudinal shrinkage and the web tension, which each act on the film.
  • the winding density setpoint for the individual film type is no longer a constant, as was previously assumed in the prior art in general, but rather the winding density depends on the parameters, profile quality R w , average film thickness D , the air gap L and the shrinkage S.
  • the film thickness D is plotted over the width of the film web, as is determined, for example, by means of conventional measuring methods, which are not discussed in more detail here.
  • the film thickness D fluctuates around the average film thickness D and shows a maximum film thickness D max and a minimum film thickness D min .
  • the profile quality R w is determined by this cross profile measurement and results from the formula
  • Fig. 2 shows a deflection roller 1 and a contact roller 2, with a film 3 between them passes through both roles 1 and 2.
  • the contact roller 2 exerts a contact pressure on the film 3, this contact pressure is variable via an actuator, not shown.
  • On the slide furthermore a film pull in the direction of the arrow is exerted, the film pull likewise is changeable.
  • the parameters profile quality R w , shrinkage S, air gap L and average thickness are used in a computer 4 in the control diagram according to FIG. 4 D the respective slide 3 entered.
  • the specified value for the air gap L ranges from 0.1 to 5 ⁇ m and depends on the respective film type.
  • the air gap L is generally in the range from 0.5 to 1 ⁇ m. L is determined in particular via the film roughness, which can be measured in a known manner.
  • the average thickness D of the film cross profile and the profile quality R w are measured in a known manner during production.
  • the longitudinal shrinkage is material-specific and ranges between 0.1 and 4% of the initial length l 0 .
  • V KS + V L ⁇ / 4 (D 2nd -d 2nd ) ⁇ B and surrendered, if the average film thickness D in ⁇ m and the other sizes in meters.
  • the target winding density Wd soll is determined from the parameters S, L, D and R W is continuously calculated according to the above equation (6) during the winding process.
  • the actual winding density Wd ist is calculated in accordance with equation (10) above and the value obtained for this is fed into a controller 5, to which the target winding density is also fed.
  • the values fed into the controller 5 for the target winding density Wd soll and the actual winding density Wd ist are processed into an output value y which is multiplied in a multiplier circuit 6 by a so-called adjustment value ⁇ for the diameter of the film roll.
  • the adaptation value ⁇ is a function of the running length l of the film and serves to avoid excessive deflections in the control in the vicinity of the winding core diameter.
  • the adaptation value ⁇ represents a damping factor which increases steeply in the vicinity of the winding core diameter and saturates after a relatively short run length l.
  • the factors A and B reflect the adaptation to the film tension and the film pressure.
  • the adjusted control values y 1 ⁇ A and y 1 ⁇ B are compared with the values of predetermined curves for the film pull and the film contact pressure as a function of the running length l of the film.
  • the setpoints for an actuator for the film pull 7 and a contact pressure actuator are determined by the adjustment and these setpoints are fed to the actuators.
  • the winding density for each film type depends on the profile quality, the average thickness of the film, the shrinkage and the air gap and is therefore not a constant. If the profile quality is poor, ie a relatively large R W must be wound more gently than a small R w .

Landscapes

  • Winding Of Webs (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
EP99104856A 1998-04-30 1999-03-11 Procédé de régulation de la densité de bobinage de rouleaux de film Withdrawn EP0953531A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19819276A DE19819276A1 (de) 1998-04-30 1998-04-30 Verfahren zur Regelung der Wickeldichte von Folienrollen
DE19819276 1998-04-30

Publications (1)

Publication Number Publication Date
EP0953531A1 true EP0953531A1 (fr) 1999-11-03

Family

ID=7866255

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99104856A Withdrawn EP0953531A1 (fr) 1998-04-30 1999-03-11 Procédé de régulation de la densité de bobinage de rouleaux de film

Country Status (11)

Country Link
US (1) US6189825B1 (fr)
EP (1) EP0953531A1 (fr)
AU (1) AU754762B2 (fr)
BR (1) BR9902321A (fr)
CA (1) CA2270712A1 (fr)
DE (1) DE19819276A1 (fr)
HU (1) HUP9901371A3 (fr)
MX (1) MXPA99004031A (fr)
PL (1) PL187758B1 (fr)
TR (1) TR199900955A2 (fr)
ZA (1) ZA992993B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9731929B2 (en) 2012-11-09 2017-08-15 Windmöller & Hölscher Kg Method for determining the winding quality of a film roll

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI103661B1 (fi) * 1998-01-22 1999-08-13 Valmet Corp Menetelmä ja laitteisto rullauksen ohjaamiseksi
FI111033B (fi) * 2001-06-15 2003-05-15 Metso Paper Inc Menetelmä rullan tiheyden määrittämiseksi
US8757533B2 (en) * 2002-02-28 2014-06-24 Kimberly-Clark Worldwide, Inc. Center/surface rewinder and winder
US7000864B2 (en) 2002-06-10 2006-02-21 The Procter & Gamble Company Consumer product winding control and adjustment
DE10327245A1 (de) * 2003-06-17 2005-01-05 Voith Paper Patent Gmbh Aufwickelvorrichtung
CN103662932B (zh) * 2013-12-17 2016-05-18 陕西北人印刷机械有限责任公司 基于分段函数曲线的印刷机收卷张力控制方法
US12049372B2 (en) * 2020-06-26 2024-07-30 Paper Converting Machine Company Method for producing coreless roll products

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4238084A (en) * 1973-07-06 1980-12-09 Kataoka Machine Product Co., Ltd. Method of controlling winding tension
DE3602745A1 (de) * 1986-01-30 1987-08-13 Smg Stahlkontor Maschinenbau G Zugspannungsregeleinrichtung fuer wickelvorrichtung
DE19604652A1 (de) * 1996-02-09 1997-08-14 Reifenhaeuser Masch Verfahren zum Aufwickeln einer Kunststoffolienbahn zu einem Coil auf einer Wickelhülse

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4150797A (en) * 1975-08-08 1979-04-24 Hiroshi Kataoka Method and device for controlling contact pressure on touch roller in sheet winder
DE3265570D1 (en) 1981-05-06 1985-09-26 Teijin Ltd Polyester film roll
DE3913131A1 (de) * 1989-04-21 1990-10-25 Hoechst Ag Verfahren und vorrichtung zum aufwickeln einer folienbahn
DE9216261U1 (de) * 1992-10-19 1994-02-24 Windmöller & Hölscher, 49525 Lengerich Vorrichtung zum Aufwickeln einer Bahn

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4238084A (en) * 1973-07-06 1980-12-09 Kataoka Machine Product Co., Ltd. Method of controlling winding tension
DE3602745A1 (de) * 1986-01-30 1987-08-13 Smg Stahlkontor Maschinenbau G Zugspannungsregeleinrichtung fuer wickelvorrichtung
DE19604652A1 (de) * 1996-02-09 1997-08-14 Reifenhaeuser Masch Verfahren zum Aufwickeln einer Kunststoffolienbahn zu einem Coil auf einer Wickelhülse

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9731929B2 (en) 2012-11-09 2017-08-15 Windmöller & Hölscher Kg Method for determining the winding quality of a film roll

Also Published As

Publication number Publication date
PL332849A1 (en) 1999-11-08
TR199900955A3 (tr) 1999-11-22
DE19819276A1 (de) 1999-11-04
US6189825B1 (en) 2001-02-20
AU754762B2 (en) 2002-11-21
HUP9901371A2 (hu) 2000-01-28
ZA992993B (en) 2000-10-30
HUP9901371A3 (en) 2002-03-28
HU9901371D0 (en) 1999-06-28
AU2602999A (en) 1999-11-11
MXPA99004031A (es) 2005-05-05
TR199900955A2 (xx) 1999-11-22
CA2270712A1 (fr) 1999-10-30
BR9902321A (pt) 2000-01-04
PL187758B1 (pl) 2004-10-29

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