EP0575371A1 - Verfahren zur behebung von planlagestörungen bei der herstellung von bahnen, insbesondere in kartonmaschinen und vorrichtung zu seiner durchführung. - Google Patents
Verfahren zur behebung von planlagestörungen bei der herstellung von bahnen, insbesondere in kartonmaschinen und vorrichtung zu seiner durchführung.Info
- Publication number
- EP0575371A1 EP0575371A1 EP92905566A EP92905566A EP0575371A1 EP 0575371 A1 EP0575371 A1 EP 0575371A1 EP 92905566 A EP92905566 A EP 92905566A EP 92905566 A EP92905566 A EP 92905566A EP 0575371 A1 EP0575371 A1 EP 0575371A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- web
- cardboard
- guide element
- bar
- round rod
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
-
- 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
- B65H23/34—Apparatus for taking-out curl from webs
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
- D21F7/003—Indicating or regulating the moisture content of the layer
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G7/00—Damping devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
- F26B13/12—Controlling movement, tension or position of material
Definitions
- the present invention relates to a method according to the preamble of claim 1, and device for its implementation with a crusher bar arranged in the machine frame, oriented transversely to the machine direction and movably mounted perpendicularly thereto.
- a carton could only be produced without any significant curvature if its mechanical properties and its moisture expansion behavior would be symmetrical with respect to its neutral plane.
- this cannot be assumed in practice if almost 100% waste paper is used in cardboard production.
- a cardboard box made from waste paper with a top layer, intermediate layer and underlay and possibly a single or multiple stroke application has considered such an inhomogeneous composition of matter over the cross section of the cardboard box that a pronounced curling tendency is inevitable.
- the maximum curvature of the long side is measured from an A4 sheet.
- a disadvantage when the post-drying group of a board machine is heated differently is that the performance of the machine is reduced due to the theoretical drying capacity which cannot be used.
- the determined laboratory curvature specifies the ratio in which the vapor pressure of the upper drying cylinders to that below the drying cylinders in the after-dryer group should be set. For a given final moisture content of the web, the reduction in the total drying capacity of the after-drying group follows from the required adjustment range of the steam pressure of the drying cylinders.
- a very different heating of the drying cylinders also leads to Wrinkling of the cardboard web with frequent tearing due to folded web edges, especially in the inlet of a coating system operated in the ON-LINE.
- DE-PS 132 241 relates to a method and
- the reason for the curling is the shortening of the surface of the coating color after drying.
- the coating layer is broken down into small individual areas by rolling with a transverse and longitudinal corrugation by pulling the paper over rounded edges.
- a disadvantage of the proposed method is that only papers with a brittle line application, which after drying can be broken down into small individual areas by appropriate treatment, can be used. Such a massive longitudinal and transverse breaking has a disadvantageous effect on the stiffness of the paper, so that after the treatment there is a lobed paper with low stiffness.
- the method proposed here cannot be used with cardboard, especially with cardboard that is smooth on one side or coated cardboard, since the corrugating rollers damage the surface or top of the cardboard by permanently affecting the smoothness and gloss that was generated there, so that the cardboard in particular with so-called chromo replacement or chromo cardboard completely loses its use value.
- the curvature in the running direction of the web can be changed, for example, by inserting breaker bars, as are known from German utility model 87 13 445, within a cross cutter. This makes it possible to correct faulty paper rolls.
- the breaker effect ie the reduction of tension on one side of the web, is achieved by pulling the web under tension over the sliding surface of the breaker bar provided with a small radius.
- the immersion depth of the crusher line is perpendicular to the web running direction and is determined according to the respectively determined one Laboratory curvature controlled.
- the principle of operation of the crusher line known from DE-GM 87 13 445 is unsuitable for use in the online operation of a board machine. Disadvantages arise from the large amount of heat generated on the sliding surface, the increased wear on the sliding surfaces and the abrasion of the underside of the carton with corresponding dusting.
- the object of the invention is to provide a method which has a continuous influence on the curvature is value for eliminating flatness disturbances in the production of webs, in particular in board machines with current web speeds, for example one
- Another object of the invention is to improve a device known as a breaker bar for mechanically eliminating flatness disturbances in such a way that the device can be operated without problems in the cardboard machine and any formation of dust on the web is largely avoided or dust that is created can be removed immediately .
- the present invention proposes to solve the problem in one
- Rotary drive rotated guide element acts perpendicular to the web running direction on the underside of the web, such that to control the flatness of a
- Cardboard sheet the manipulated variable for the immersion depth of the
- the underside of the web is derived, so that when the surface moisture difference changes, the immersion depth of the
- Actuator here is a guide element acting on the underside of the web, which with two in
- Diameter of relatively large guide rollers causes a three-fold change in direction of the web, d. H. the wrap angle of the web increases due to the
- the surface moisture difference that changes during the production process specifies how far the current position sensor indicates
- Guide element can be done manually, for which purpose then as
- Position indicator an optical display of the
- Immersion depth is sufficient. This is preferably done
- a position transducer for example an inductive displacement transducer
- Leitieri ⁇ is required.
- the performance capacity of a board machine could be increased by up to 10% without the curvature determined on the reel samples deviating from the specified quality tolerance range.
- a wrap angle of the web achieved by the immersion depth of the guide element over the guide element up to 60 degrees has no influence on the bending stiffness required for the cardboard, as shown in Example 2 below for differently heavy cardboard materials.
- the guide element rotate in the direction of web travel or in opposite directions, the peripheral speed of the guide element being chosen to be less than 1% of the web speed.
- the rotation of the * s guide element reduces friction and prevents tearing out of track components, which can lead to the dreaded dusting.
- one-sided wear of the same is prevented by the rotation of the guide element.
- the guide element is cooled.
- the guide element can be cooled by means of water or air.
- Infrared reflection sensor measurement shown to be particularly suitable. This is done using a multifilter technique used that uses additional wavelength ranges and evaluates the absorption of the pulp-specific resonance frequency, so that the sensor measures water weight and fiber weight at the same time. The measurement enables a direct display at a
- the sensors are arranged opposite each other above and below the web.
- a device for carrying out the method according to the invention is set out in claim 6 and preferred embodiments are specified in subclaims 7 to 11.
- a breaker bar is arranged between two guide rollers spaced apart from one another, which serve to support the passing web.
- the breaker bar has a round rod provided with a rotary drive and can be moved with the round rod first into the intermediate space which is formed by two guide rollers spaced apart from one another.
- means are provided for repetitively setting positions perpendicular to the running direction of the web.
- the two guide rollers interacting with the crusher line are advantageously arranged such that the web guide does not change before and after the guide rollers, regardless of the position of the Breaker bar takes between the guide rollers.
- the web surface to be printed, which is supported against the guide rollers, is protected in that the peripheral speed of the guide rollers is synchronized with the web speed by means of its own drive.
- the center distance of the guide rollers is at least 1.2 times larger than their outer diameter.
- the diameter of the round rod is at least 40 times smaller than the diameter of the guide rollers.
- the breaker bar has a slidable material Manufactured receptacle for supporting and guiding the round bar.
- the receptacle which preferably extends over the entire width of the web, supports the round rod rotating in it uniformly without the round rod being able to bend.
- a further embodiment of the invention has a groove in the longitudinal direction in the bottom of the receptacle, that is to say across the entire width of the web, which is provided with at least one cooling water inlet and outlet channel at its ends.
- the rotating round bar rests on the groove and is constantly wetted by cooling water which is passed through the groove. At the same time, particles adhering to the round rod and torn from the web are removed.
- the starting material was a 3-ply cardboard made from waste paper with a 3-ply top layer.
- the cardboard web had the following measured values in the cardboard machine before winding on :
- the measured absolute moisture content of the cardboard web corresponds to the respective mean values, which were taken from the measuring positions, driver's side, middle and drive side on the cardboard machine.
- the curvature could be kept stable over a period of more than 3 hours.
- moisture-independent influences on the curvature are caused by changes in the setpoint value of the control loop, i.e. Adjustment of the average surface moisture difference in relation to the immersion depth T, compensated at intervals of 2 to 3 hours.
- Flexural rigidity of the sheet materials expressed as the geometric mean of the root from longitudinal and transverse measurements (L x q), to the immersion depth of the round bar.
- Figure 3 shows the effect of the immersion depth of the breaker bar on the wrap angle of the web for a particular geometry.
- FIG. 4 shows the side view of a device according to the invention in a schematic representation, arranged in a cardboard machine, and the operating sequence of the control circuit according to the invention
- FIG. 5 shows a front view in partial section of the one in FIG.
- FIGS. 6 and 7 in an enlarged isometric representation of parts of the receptacle with round rods mounted therein, FIG. 6 shows the section V shown in FIG. 5.
- FIG. 4 shows schematically the guidance of the cardboard web (9) in reverse from the winding system (21) of a cardboard machine.
- a surface moisture measuring device with an infrared reflection sensor (7) for the ceiling and another infrared reflection sensor (8) for the underside of the cardboard web (9).
- These sensors are installed, preferably with further sensors, as are customary today in the quality control system, in a measuring frame (22) which may be constructed with a traversing device.
- a measuring frame (22) which may be constructed with a traversing device.
- On the right-hand side of FIG. 4 is the device for mechanically correcting flatness faults arranged in the machine frame (1).
- the breaker bar (3) which is displaceably mounted by linear guides (28) perpendicular to the web running direction (2), is shown in two positions.
- the lower, dash-dotted position shows with the lifting cylinder (12) completely lowered that the cardboard web (9) has no contact with the breaker bar (3) and the guide rollers (5; 6).
- the second position corresponds to a possible position of the breaker bar (3) with the immersion depth T, the cardboard web (9) being subject to a three-fold change in direction.
- the guide rollers (5; 6) have, for example, an outer diameter D of 500 mm and their center distance is 640 mm. This results in a narrow intermediate space (10) in which the crusher bar (3) can be moved into the center.
- the wrap angle (2 x ⁇ ) of the cardboard web (9) over the crusher line (3) increases approximately proportionally with increasing immersion depth T according to FIG. 3, where ⁇ the angle of the cardboard web (9) from the guide roller (6) to the web running direction (2 ) indicates.
- the measurement signal processing takes place in the transmission element
- the manipulated variable x results in the set immersion depth T of the breaker bar (3).
- the current position x _ of the breaker bar (3) is indicated by the position indicator (11).
- the two guide rollers (5; 6) each have a drive (20) rotating synchronously with the web speed, so that there is no line damage on the cover of the cardboard web (9).
- Round rod (4) has a diameter d of 10 mm in relation to the aforementioned example, i.e. 50 times smaller than the diameter D of the opposite one
- the receptacle (14) made of cast iron, for example, guides the round rod (4) in a 10 mm wide and 5 mm deep groove made by milling or broaching. In the middle of the bottom of the groove is a second groove (17) with a width and
- the hard chrome-plated and polished round rod (4) is supported on the slightly broken or rounded edges (24) of the groove (17) and is supported on the end faces of the receptacle (14) by a known bearing (15) and
- a thick-walled tube is used as a round rod (25)
- the cooling water can be supplied and removed at the ends by rotating unions.
- the rotary drive of the round rod (25) must then be arranged laterally and the round rod (25) is driven, for example, by means of a toothed belt drive.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Paper (AREA)
- General Factory Administration (AREA)
- Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
- Details Of Cutting Devices (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4108056A DE4108056A1 (de) | 1991-03-13 | 1991-03-13 | Verfahren zur behebung von planlagestoerungen bei der herstellung von bahnen in papier- oder kartonmaschinen und vorrichtung zu seiner durchfuehrung |
DE4108056 | 1991-03-13 | ||
PCT/EP1992/000443 WO1992016690A1 (de) | 1991-03-13 | 1992-02-29 | Verfahren zur behebung von planlagestörungen bei der herstellung von bahnen, insbesondere in kartonmaschinen und vorrichtung zu seiner durchführung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0575371A1 true EP0575371A1 (de) | 1993-12-29 |
EP0575371B1 EP0575371B1 (de) | 1995-07-12 |
Family
ID=6427150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92905566A Expired - Lifetime EP0575371B1 (de) | 1991-03-13 | 1992-02-29 | Verfahren zur behebung von planlagestörungen bei der herstellung von bahnen, insbesondere in kartonmaschinen und vorrichtung zu seiner durchführung |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0575371B1 (de) |
AT (1) | ATE125014T1 (de) |
DE (2) | DE4108056A1 (de) |
ES (1) | ES2074880T3 (de) |
WO (1) | WO1992016690A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009022248B4 (de) | 2009-05-20 | 2019-04-25 | Bw Papersystems Hamburg Gmbh | Entwölbungsvorrichtung zur Entwölbung einer Materialbahn, insbesondere in einer Anlage der papierverarbeitenden Industrie |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19844927A1 (de) * | 1998-09-30 | 2000-04-06 | Voith Sulzer Papiertech Patent | Meßsystem |
DE10127840A1 (de) * | 2001-06-08 | 2002-12-12 | Voith Paper Patent Gmbh | Verfahren und Vorrichtung zur Messung von innerhalb einer Materialbahn auftretenden Spannungen |
CN103086179B (zh) * | 2013-01-29 | 2015-09-16 | 麦斯科林(无锡)科技有限公司 | 一种布料展平装置 |
CN105645160B (zh) * | 2016-03-10 | 2017-07-18 | 深圳市鑫三力自动化设备有限公司 | 一种适用于深腔玻璃缓冲材导向结构及其导向方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE132241C (de) * | ||||
US1987670A (en) * | 1933-05-11 | 1935-01-15 | Westinghouse Electric & Mfg Co | Braking generator for use with calender |
DE3614713A1 (de) * | 1986-04-30 | 1987-11-05 | Babcock Textilmasch | Vorrichtung zur regelung der waermezufuhr bei laufenden warenbahnen |
DE8713445U1 (de) * | 1987-10-07 | 1988-02-18 | Steffen & Bergmann Konstruktionstechnik Ohg, 4905 Spenge, De |
-
1991
- 1991-03-13 DE DE4108056A patent/DE4108056A1/de not_active Withdrawn
-
1992
- 1992-02-29 EP EP92905566A patent/EP0575371B1/de not_active Expired - Lifetime
- 1992-02-29 WO PCT/EP1992/000443 patent/WO1992016690A1/de active IP Right Grant
- 1992-02-29 DE DE59202877T patent/DE59202877D1/de not_active Expired - Fee Related
- 1992-02-29 AT AT92905566T patent/ATE125014T1/de not_active IP Right Cessation
- 1992-02-29 ES ES92905566T patent/ES2074880T3/es not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9216690A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009022248B4 (de) | 2009-05-20 | 2019-04-25 | Bw Papersystems Hamburg Gmbh | Entwölbungsvorrichtung zur Entwölbung einer Materialbahn, insbesondere in einer Anlage der papierverarbeitenden Industrie |
Also Published As
Publication number | Publication date |
---|---|
DE4108056A1 (de) | 1992-09-17 |
EP0575371B1 (de) | 1995-07-12 |
DE59202877D1 (de) | 1995-08-17 |
WO1992016690A1 (de) | 1992-10-01 |
ATE125014T1 (de) | 1995-07-15 |
ES2074880T3 (es) | 1995-09-16 |
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