EP1063352B1 - Elastische Walze und Vorrichtung mit einer solchen Walze - Google Patents
Elastische Walze und Vorrichtung mit einer solchen Walze Download PDFInfo
- Publication number
- EP1063352B1 EP1063352B1 EP00107313A EP00107313A EP1063352B1 EP 1063352 B1 EP1063352 B1 EP 1063352B1 EP 00107313 A EP00107313 A EP 00107313A EP 00107313 A EP00107313 A EP 00107313A EP 1063352 B1 EP1063352 B1 EP 1063352B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- roll
- face
- accordance
- filling materials
- 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
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/02—Rolls; Their bearings
- D21G1/0233—Soft rolls
Definitions
- the present invention relates to a roller, in particular for smoothing of paper webs, with a hard one consisting in particular of metal Roll core with an elastic matrix material on the outside comprehensive elastic reference layer is provided.
- a device in particular for smoothing Material webs, with an elastic roller and a hard counter roller and a method for checking the reference layer of such a roller directed.
- Elastic rollers of this type are used, for example, when satinizing paper webs.
- An elastic roller forms a press nip with a hard roller through which the paper web to be processed is passed. While the hard roller has a very smooth surface, for example made of steel or cast iron, and is responsible for smoothing the side of the paper web facing it, the elastic roller acting on the opposite side of the paper web causes the paper web to be leveled and compressed in the press nip.
- the size of the rollers is 3 to 12 m in length and 450 to 1500 mm in diameter. They withstand line forces up to 600 N / mm and compressive stresses up to 130 N / mm 2 .
- plastic coverings maximum temperature differences of about 20 ° C over the Width of the roller permitted and on the other hand have that for the coating
- plastics used are much higher Thermal expansion coefficients than those commonly used Steel rollers or chill cast rollers, so that by an increase in temperature high axial tensions between the steel roller or chilled iron roller and the associated plastic coating occur.
- the part of the task relating to the roller is based on the invention solved by a roller of the type mentioned in that in the matrix material light-conducting fillers are provided and that Fillers for receiving impingement on one end of the roller Light, to transmit the light received to the other Front of the roller and to emit the transmitted light on it other end face are formed.
- a corresponding device is characterized in that the elastic Roll is designed according to the invention, and that in the area one end face of the roller has at least one light-emitting transmission unit and at least one in the area of the other end face of the roller Light-receiving unit are provided.
- a method according to the invention is characterized in that a the front of the reference layer is exposed to light that the emerging light is received on the opposite end and that in the absence of a received light signal for a predetermined Time and / or when falling below a predetermined reception light level generates a control signal for a predetermined time, in particular a Roll comprehensive device is turned off.
- the inventive design of the roller makes it possible to cover the reference layer on one of its end faces with light, for example visible Light to be applied, this light passing through the reference layer transported and at the opposite end the reference layer is released again. At this point, the delivered Light received by the receiving unit and for further Evaluation to be forwarded to an evaluation unit.
- light for example visible Light
- the transmitting and receiving unit can be arranged stationary, while the roller, as usual, arranged rotatable about its longitudinal axis is. In this way, a single sending and receiving unit the entire reference layer during one revolution of the roller checked for defects.
- the fillers are designed as light-conducting fibers. Especially when the fibers continuously from one end of the roller to the opposite side Extend end face, is a particularly high light output when transmitting the light from one end to the opposite Front of the reference layer reached.
- the fillers for receiving, transferring and dispensing are preferred trained by visible light.
- visible When using visible
- light can be formed by simply designed transmitting and receiving units are used and on the other hand there is also an optical control the reference layer on breaks in the light-conducting fibers possible. In principle, however, the use of light with a Wavelength outside the visible range is possible. In in this case, the sending and receiving unit must be corresponding trained to send and receive light of the wavelength used his.
- the fillers can be made of glass or plastic or other light with the selected wavelength transporting materials his.
- the use of glass is advantageous, because with glass there is also a Increasing the stiffness of the elastic matrix material as well as an adjustment of the coefficient of thermal expansion of the matrix material the coefficient of thermal expansion of the metallic roll core can be achieved.
- Glass fibers the occurrence of longitudinal stresses between the elastic Reference layer and the metallic roller core and thus that The occurrence of hot spots can be avoided or at least reduced.
- the fillers can be essentially concentric layers can be arranged in the reference layer, where they are embedded, for example, between further fiber layers, the by winding the basic structure of the reference layer on the roller core form.
- These wound fibers can be used as fiber bundles are applied to the roller core, for example beforehand pulled through a matrix bath.
- Each time after winding one of these Reinforcement layers can then be those extending in the axial direction light-conducting fibers are introduced into the matrix material.
- the Light conductivity of the matrix material is smaller than that of the fillers, in particular the matrix material is essentially opaque.
- the matrix material is essentially opaque.
- the light is preferably contactless into the reference layer through the transmission unit can be introduced and / or that emitted by the reference layer Light can be picked up by the receiving unit without contact. Since both for No sliding contacts are required to insert or remove the light the entire device is maintenance-free and on the other hand, the interfaces to the elastic roller are free of wear. This will increase the reliability as well as the lifespan of a corresponding device significantly increased.
- Fig. 1 shows a roller 1, for example made of steel or cast iron existing roll core 2 and one provided on the outside thereof elastic reference layer 3 comprises.
- the elastic reference layer 3 a elastic matrix material 4 and, embedded in this, between the two end faces 5, 6 of the elastic reference layer 3 extending includes light-conducting fibers 7, 7 ', 7' '.
- a transmission unit 8 is arranged in the region of the end face 5, through which Light represented by arrows 9 on the end face 5 of the elastic reference layer 3 can be broadcast.
- the light is absorbed by the light-conducting fibers 7, 7 ', 7' 'and through the elastic reference layer 3 to the end face 6 thereof transfer.
- the light emerges at the end face 6, as indicated by arrows 10 is indicated, and is received there by a receiving unit 11.
- the receiving unit 11 is connected to an evaluation unit 12 which is designed to control other devices, as is by a Switch 13 is indicated.
- the drive can Smoothing device, which has the roller 1 as a component, by the evaluation unit 12 to be stopped.
- the 2 is the concentric in an advantageous embodiment Arrangement of the light-conducting fibers 7, 7 ', 7' 'can be seen. Furthermore, the 2 that in the matrix material 4 in addition to the light-conducting Fibers 7, 7 ', 7' 'fiber layers 16 are embedded. These fiber layers can consist of coal or glass fiber rovings and serve to reinforce the elastic matrix material 4. Furthermore, other physical properties of the reference layer 3, for example the thermal conductivity and the coefficient of thermal expansion through the appropriate choice of fiber material can be set.
- the evaluation unit 12 can, for example, either for fluctuations react in the light intensity or there is an integration via the amount of light received, for example, per revolution, since this too in the event of an interruption of only a few light-conducting fibers 7, 7 ', 7' ' is reduced. In each of these cases, the evaluation unit 12 recognizes that a part of the light-conducting fibers 7, 7 ', 7' 'is interrupted and enters corresponding control signal. This can be used, for example Paper smoothing device to be stopped before the elastic reference layer the elastic roller is completely destroyed.
Landscapes
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Paper (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Description
- Fig. 1
- eine schematische, teilweise aufgerissene Darstellung einer erfindungsgemäß ausgebildeten Walze und
- Fig. 2
- einen Querschnitt durch die Walze aus Fig. 1.
- 1
- Walze
- 2
- Walzenkern
- 3
- elastische Bezugsschicht
- 4
- Matrixmaterial
- 5
- Stirnseite
- 6
- Stirnseite
- 7, 7', 7"
- lichtleitende Fasern
- 8
- Sendeeinheit
- 9
- ausgesandtes Licht
- 10
- Empfangslicht
- 11
- Empfangseinheit
- 12
- Auswerteeinheit
- 13
- Schalter
- 14
- Hot-Spot
- 15
- Unterbrechungsstelle
- 16
- Faserlagen
Claims (10)
- Walze, insbesondere zum Glätten von Papierbahnen, mit einem insbesondere aus Metall bestehenden harten Walzenkern (2), der an seiner Außenseite mit einer ein elastisches Matrixmaterial (4) umfassenden elastischen Bezugsschicht (3) versehen ist,
dadurch gekennzeichnet, daß in dem Matrixmaterial (4) lichtleitende Füllstoffe (7, 7', 7'') vorgesehen sind und daß die Füllstoffe (7, 7', 7'') zum Aufnehmen von auf einer Stirnseite (5) der Walze (1) auftreffendem Licht (9), zum Übertragen des aufgenommenen Lichts (9) zu der anderen Stirnseite (6) der Walze (1) und zum Abgeben des übertragenen Lichts (10) an dieser anderen Stirnseite (6) ausgebildet sind. - Walze nach Anspruch 1,
dadurch gekennzeichnet, daß die Füllstoffe als lichtleitende Fasern (7, 7', 7'') ausgebildet sind. - Walze nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß sich die insbesondere als Fasern (7, 7', 7'') ausgebildeten Füllstoffe vorzugsweise ununterbrochen von der einen Stirnseite (5) der Walze zu deren gegenüberliegenden Stirnseite (6) erstrecken und/oder
daß die Füllstoffe (7, 7', 7'') zum Aufnehmen, Übertragen und Abgeben von sichtbarem Licht ausgebildet sind und/oder
daß die Füllstoffe (7, 7', 7'') aus Glas oder Kunststoff ausgebildet sind. - Walze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die Füllstoffe (7, 7', 7'') in Umfangsrichtung und/oder in axialer Richtung und/oder in radialer Richtung im wesentlichen gleichmäßig in der Bezugsschicht (3) verteilt sind und/oder
daß die Füllstoffe (7, 7', 7'') in insbesondere im wesentlichen konzentrischen Lagen in der Bezugsschicht angeordnet sind. - Walze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die Lichtleitfähigkeit des Matrixmaterials (4) kleiner als die der Füllstoffe (7, 7', 7'') ist, insbesondere daß das Matrixmaterial (4) im wesentlichen lichtundurchlässig ist, und/oder
daß das Matrixmaterial (4) ein Kunststoff, insbesondere ein Duroplast oder ein Thermoplast ist. - Vorrichtung, insbesondere zum Glätten von Materialbahnen, beispielsweise Papierbahnen, mit einer elastischen Walze (1) und einer harten, beispielsweise aus Metall bestehenden Gegenwalze,
dadurch gekennzeichnet, daß die elastische Walze (1) nach einem der vorhergehenden Ansprüche ausgebildet ist und daß im Bereich der einen Stirnseite (5) der Walze (1) zumindest eine Licht aussendende Sendeeinheit (8) und im Bereich der anderen Stirnseite (6) der Walze (1) zumindest eine Licht aufnehmende Empfangseinheit (11) vorgesehen sind. - Vorrichtung nach Anspruch 6,
dadurch gekennzeichnet, daß die Empfangseinheit (11) mit einer Auswerteeinheit (12) verbunden ist, durch die bei Ausbleiben eines Empfangslichtsignals für eine vorbestimmte Zeit und/oder bei Unterschreiten eines vorgegebenen Empfangslichtpegels für eine vorbestimmte Zeit ein entsprechendes Steuersignal erzeugbar ist. - Vorrichtung nach Anspruch 6 oder 7,
dadurch gekennzeichnet, daß die Sendeeinheit (8) und die Empfangseinheit (11) im stimseitigen Bereich (5, 6) der Bezugsschicht (3) angeordnet sind und/oder
daß die Sendeeinheit und die Empfangseinheit (11) genau gegenüberliegend angeordnet sind und/oder
daß die Sende- und die Empfangseinheit (8, 11) zum Senden bzw. Empfangen von Licht der gleichen Wellenlänge, insbesondere von sichtbarem Licht, ausgebildet sind. - Vorrichtung nach einem der Ansprüche 6 bis 8,
dadurch gekennzeichnet, daß durch die Sendeeinheit (8) das Licht (9) kontaktlos in die Bezugsschicht einbringbar ist und/oder daß durch die Empfangseinheit (11) das von der Bezugsschicht abgegebene Licht (10) kontaktlos aufnehmbar ist und/oder daß mehrere Sende- und/oder mehrere Empfangseinheiten (8, 11) vorgesehen sind. - Verfahren zum Prüfen der Bezugsschicht einer elastischen Walze nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß eine der Stirnseiten der Bezugsschicht mit Licht beaufschlagt wird, daß das auf der gegenüberliegenden Stirnseite austretende Licht empfangen wird und daß bei Ausbleiben eines Empfangslichtsignals für eine vorbestimmte Zeit und/oder bei Unterschreiten eines vorgegebenen Empfangslichtpegels für eine vorbestimmte Zeit ein Steuersignal erzeugt, insbesondere eine die Walze umfassende Vorrichtung abgeschaltet wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19928754A DE19928754A1 (de) | 1999-06-23 | 1999-06-23 | Elastische Walze und Vorrichtung mit einer solchen Walze |
DE19928754 | 1999-06-23 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1063352A2 EP1063352A2 (de) | 2000-12-27 |
EP1063352A3 EP1063352A3 (de) | 2001-11-14 |
EP1063352B1 true EP1063352B1 (de) | 2004-06-23 |
Family
ID=7912257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00107313A Expired - Lifetime EP1063352B1 (de) | 1999-06-23 | 2000-04-04 | Elastische Walze und Vorrichtung mit einer solchen Walze |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1063352B1 (de) |
DE (2) | DE19928754A1 (de) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3082683A (en) * | 1960-04-11 | 1963-03-26 | Beloit Iron Works | Roll structure |
CH682893A5 (de) * | 1991-05-03 | 1993-12-15 | Escher Wyss Ag | Walze und Kunststoffolien-Giessanlage mit einer Walze. |
DE19613392C1 (de) * | 1996-04-03 | 1997-07-24 | Voith Sulzer Papiermasch Gmbh | Preßvorrichtung |
-
1999
- 1999-06-23 DE DE19928754A patent/DE19928754A1/de not_active Withdrawn
-
2000
- 2000-04-04 EP EP00107313A patent/EP1063352B1/de not_active Expired - Lifetime
- 2000-04-04 DE DE50006871T patent/DE50006871D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP1063352A3 (de) | 2001-11-14 |
DE50006871D1 (de) | 2004-07-29 |
DE19928754A1 (de) | 2000-12-28 |
EP1063352A2 (de) | 2000-12-27 |
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