EP0452337A1 - Calandre a estamper - Google Patents

Calandre a estamper

Info

Publication number
EP0452337A1
EP0452337A1 EP19900900058 EP90900058A EP0452337A1 EP 0452337 A1 EP0452337 A1 EP 0452337A1 EP 19900900058 EP19900900058 EP 19900900058 EP 90900058 A EP90900058 A EP 90900058A EP 0452337 A1 EP0452337 A1 EP 0452337A1
Authority
EP
European Patent Office
Prior art keywords
roller
embossing
counter
cooling
pressure
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Withdrawn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
EP19900900058
Other languages
German (de)
English (en)
Inventor
Bernhard Brendel
Bernhard Funger
Klaus Kubik
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.)
Eduard Kuesters Maschinenfabrik GmbH and Co KG
Original Assignee
Eduard Kuesters Maschinenfabrik GmbH and Co KG
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 Eduard Kuesters Maschinenfabrik GmbH and Co KG filed Critical Eduard Kuesters Maschinenfabrik GmbH and Co KG
Publication of EP0452337A1 publication Critical patent/EP0452337A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts

Definitions

  • the invention relates to an embossing calender of the type corresponding to the preamble of claim 1.
  • the axes of all three rollers involved lie in one and the same plane.
  • the film to be embossed is introduced in a thermoplastic state between the embossing roller and the counter-pressure roller, embossed in the embossing roll gap and then removed again after the embossing roller has been wrapped around by 90 ° to 1800 °.
  • the embossing roller is strongly cooled, so that the temperature of the embossed film is lowered on the looping path to below the thermoplastic area.
  • the counter-pressure roller is also cooled, but the effectiveness of this cooling is limited because of the poor thermal conductivity of the elastic roller cover. For this reason, an additional cooling roller is required, which removes the heat transferred from the thermoplastic film into the surface area of the elastic coating of the counter-pressure roller.
  • rollers with an engraved run that literally emboss the foils from their level in places in a pattern-specific manner, but also only a surface structure of the foils, for example to improve the adhesion of a surface adhesive their surface, for example, are blasted or brushed.
  • Even rollers with a very smooth surface can, in cooperation with the counter-pressure roller having a flexible reference, bring about a distinctive structural change in the film.
  • all three rolls involved are conventional rolls. This inevitably results in an uneven line pressure both in the embossing roll gap and in the cooling roll gap. The edges of the web are pressed more than the inner areas.
  • the elastic coating of the counter-pressure roller is subjected to greater stress at the edges and requires a relatively frequent regrinding. Because of the overpressing of the edges, the embossing forms differently on the inside of the web and on the edge, and the flatness of the web deteriorates because the edges that are subjected to greater stress are rolled out more and are therefore wavy. In order to achieve an acceptable uniformity of the embossing treatment at all, the hardness of the elastic cover of the counter-pressure roller must be low, which limits the possibilities of embossing and reduces the service life of the cover.
  • the object of the invention is to make the embossing more uniform over the width of the web and to improve the tool life.
  • the line pressure can be adjusted evenly across the width of the web. This eliminates the disadvantages mentioned above, which occurred due to the line pressure increase at the edges of the known embossing calendar arrangements.
  • the hardness of the cover had to be low (for example 60 ° shore A) in order to ensure a sufficiently even line pressure
  • the hardness can now be freely selected according to the requirements of the embossing process, since line pressure compensation is no longer a matter of the cover is.
  • the heat removal from the counterpressure roller is also made more uniform over the width of the web.
  • the crowning of the cooling roller can also produce a uniform line pressure in the cooling roller nip with suitable coordination of the external forces acting on the pin of the cooling roller, so that the cooling roller lies evenly on the counter-pressure roller and the heat loss over the entire cooling pressure roller nip is constant is. This eliminates the stress maxima at the edges of the counter-pressure roller and increases their grinding intervals.
  • the crowning is slight.
  • the actual deviations from the ideal cylindrical shape are a few tenths of a millimeter, for example in the case of rolls 3 m long, i.e. the cambered cooling roller has a diameter that is a few tenths of a millimeter larger in the middle than at the ends.
  • these amounts are small in absolute terms, thin embossed goods can still have a significant impact on the line pressure distribution and thus on treatment loss.
  • the cooling roller can be a conventional roller.
  • the uniformity of the system on the counter-pressure roller in the direction perpendicular to its direction of action is brought about for a certain line pressure only by the crowning. So with only one hydraulically internally supported roller, i.e. With the least possible effort, two nips can be provided with an even line print independently of each other.
  • rollers which comprise an non-rotatable crosshead, around which a hollow roller can be rotated, which inside is attached to the crosshead by one which acts against the inner circumference of the hollow roller hydraulic support device is supported over the length of the hollow roller.
  • rollers with sliding shoes according to US-PS 31 19 324 or DE-PS 14 61 066 rollers with hydrostatic support punches according to DE are therefore suitable -OS 22 3o 139 and DE-AS 23 32 861 as well as further developed constructions according to DE-PS 3o o3 395 or DE-OS 36 4o 9o2.
  • the embossing roller which is supposed to be a conventional roller, deflects, an essentially uniform pressure can be achieved across the working width.
  • the rollers of the embossing calender according to the invention have an F arrangement, ie two rollers lie against one another and a third roller is on the side of one of the rollers scheduled.
  • Such a roller configuration is known per se in embossing calenders from FR-PS 524 743, Fig. 1.
  • FR-PS 524 743 Fig. 1.
  • the function of the FR-PS 524 743 is therefore different from that of the invention, and there is also no interaction between a cambered and a hydraulically internally supported roller.
  • embossing structure for the coating of the counter-pressure roller is intended to encompass the properties which are also given for the embossing roller, that is to say surface relief, surface structure, etc., but also internal structures which give an uneven flexibility over the surfaces and are caused by fillers, uneven radiation or similar can be generated.
  • the location and design of the F arrangement of the rolls of the embossing calender are arbitrary.
  • an embodiment according to claim 3 is preferred, in which the connecting plane of the counterpressure roller and the embossing roller is horizontal, because then the roller weights are easier to detect when controlling the line pressures.
  • the embodiment according to claim 4 is particularly preferred, in which the cooling roller is arranged vertically below the counter-pressure roller. There is also the side effect of counteracting the sag of the counter-pressure roller.
  • the direction of action of the counter-pressure roller is horizontal against the embossing roller. In the vertical direction, the hollow roller is unsupported in the counter-pressure roller and therefore sags a little under its weight.
  • the cambered cooling roller is now placed against the counter-pressure roller from below and preferably moves it up in the middle, so that the sag is eliminated to a greater or lesser extent.
  • the procedural aspect according to claim 1 expresses that the external forces acting on the pins of the conventionally designed cooling roller are to be controlled with their crowning and the weight of the hollow roller of the counter-pressure roller in such a way that a uniform line pressure results in the cooling roller gap.
  • Fig. 1 shows a side view of the embossing calender according to the invention
  • FIG. 4 and 5 show views of the embossing calender according to FIG. 1 from the left;
  • 6 and 7 show side views of further exemplary embodiments.
  • the embossing calender designated as a whole in FIG. 1, serves for embossing a thermoplastic plastic film 1 which, in the thermoplastic state in the direction of the arrow 2, runs vertically from above into an embossing roll gap 3 which runs between an embossing roll 4 and a counter pressure roller 5 is formed.
  • the axes of the rollers 4, 5 are parallel to one another in the same horizontal plane.
  • the embossing roller 4 has a surface relief 6 which corresponds to the desired embossing pattern and is pressed into the web 1 as it passes the embossing roller gap 3.
  • the depth of the surface relief 6 is exaggerated. It can also be a very flat relief, which only structures the surface of the web 1.
  • the embossing roller 4 is of conventional design, ie the pins rotate together with the circumference of the roller, and is strongly cooled, ie it has internal channels through which a fluid cooling medium can be passed.
  • the web 1 After passing the embossing roll gap, the web 1 travels a wrap angle 7 on the cooled embossing roll 4 and then leaves the embossing roll 4 in the direction of the arrow 8.
  • the wrap angle 7 is approximately 140 ° in the exemplary embodiment.
  • the web 1 is cooled down under the thermoplastic region while the wrap angle 7 is covered, so that the embossing pattern is consolidated.
  • the web 1 thus affects only the Pr 'ägewalze 4 and the platen 5, but not yet treated below the cooling roll. 11
  • the counter-pressure roller 5 is designed as a hydraulically internally supported roller, which is to be indicated by the circular arc 9. It has an elastic coating lo made of rubber or a suitable plastic and is therefore against the back of the web 1. 1 from right to left against the embossing roller 4.
  • the coating lo can be smooth and homogeneous, but it can also have an embossing structure if the back 1 is embossed on the web 1 as it passes through the embossing nip 3 shall be.
  • a cambered cooling roll 11 which also as a conventional Wa 2 LZE formed and having insidede ⁇ channels through which a fluid cooling medium is passed. With its cooled circumference, the cooling roller 11 lies directly against the outer circumference of the elastic coating lo and thus forms a cooling roller gap 12 in which heat transferred from the web 1 to the elastic coating lo is dissipated.
  • exemplary embodiments for the counter-pressure roller 5 are shown. These are hydraulically internally supported rollers, each of which comprises a non-rotatable crosshead and a hollow roller 21 which can be rotated about it, both made of steel. The elastic coating lo is attached to the hollow roller 21.
  • the crosshead 2o almost fills the inner cross section of the hollow roller 21, but leaves all around a radial distance from the inner circumference of the hollow roller 21, so that the crosshead 2o can bend slightly inside the hollow roller 21 without contacting the inner circumference of the hollow roller 21 get.
  • the counter-pressure roller 5 is designed as a so-called floating roller, in which there are diametrically opposed longitudinal seals 22 on the crosshead 20, which bear against the inner circumference of the hollow roller 21 and seal against the ends of the hollow roller 21
  • Hollow roller 21 end cross seals not shown are assigned, so that in the space between the outer circumference of the crosshead and the inner circumference of the hollow roller 21 a semi-cylindrical shell-shaped longitudinal chamber 26 is divided, which is formed in the crosshead 20 in the indicated line 24o Can be filled with hydraulic fluid that exerts pressure against the inner circumference of the hollow roller 21.
  • the resultant of this pressure is a force 13 with which the hollow roller 21 to the right in the arrangement of the longitudinal seals 22 shown in FIG. 1 is pressed against the embossing roller 4.
  • radial cylinder bores 27 are provided in the crosshead 20 on the side of the roll gap in a row over the length of the hollow roller 21, in which piston-like support elements 28 are displaceable, which under the pressure of one of the adapters ⁇ line 24 pressurized liquid press the hollow roller 21 according to FIG. 3 to the right or according to FIG. 1 against the embossing roller 1.
  • the counter pressure roller 5 is supported with the ends 2o 'of the crosshead 2o protruding from the hollow roller 21 in a roller stand 14.
  • the hollow roller 21 sags somewhat under its weight.
  • the cooling roller 11 arranged below is cambered, ie it is somewhat thicker in the middle than at the ends. Both the sag and the bombage are very exaggerated. In reality, the deviations from the cylindricity are of the order of a few tenths of a millimeter.
  • the cooling roll gap 12 has been closed in that the convex cooling roll 11 arranged under the counter-pressure roll 5 has been raised.
  • a plant is initially in the middle.
  • the hollow roller 21 of the counter-pressure roller 5 is pushed up and the cooling roller 11, which is designed as a conventional roller, bends slightly downward in the manner shown in FIG. 5 under the line load occurring in the cooling roller gap 12.
  • a force 15 is finally achieved at which the line force in the cooling roll nip 12 is uniform over the length of this cooling roll gap. This is the desired operating state, because then the heat taken off by the cooling roller 11 from the counter-pressure roller 5 is uniform over the width of the web 1.
  • the counter-pressure roller 5 is shown in FIG. 5. However, this is not mandatory. When the uniform line pressure is reached in the cooling roll nip 12, it can also have a slight bend in a vertical plane. With regard to the uniformity of the embossing pressure in the embossing roll nip 3, this does not matter, just as it is of no importance for the uniformity of the system in the cooling roll nip 12 if the embossing roll 4 bends a little under the pressure of the counter-pressure roll 5. The decisive factor is that the line forces in the nips - lo -
  • the counter-pressure roller 5 is driven, although the means for this purpose are not shown in the drawing.
  • the other two rollers 4, 11 can also be driven if necessary.
  • the rollers 4 and 5 have the same arrangement as in FIG. 1, only the cambered cooling roller is now arranged vertically above the counterpressure roller 5 and, accordingly, the cooling roller gap 12 is located on the top of the counterpressure roller 5.
  • the sag of the counter-pressure roller 5 and the crowning of the cooling roller 11 are directed in opposite directions.
  • the cooling roller 11 is set against the counter-pressure roller from below. By the time the line force in the cooling roll nip 12 is uniform, it has reached a certain height.
  • the sag of the counter-pressure roller 5 and the crowning of the cooling roller 11 are rectified, namely downwards. With its crowning, the cooling roller 11 adapts to a certain extent to the shape of the top of the counterpressure roller. Even with very low line forces, the uniformity of the system can be achieved over the length of the cooling roll gap 12 in this arrangement. It goes without saying that the crowning and sag of the cooling roll 11 must be stronger than the sag of the counterpressure roll 5 before the cooling roll gap 12 closes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

Une calandre à estamper (100) comprend un cylindre à estamper (4) qui forme un cylindre refroidi de manière classique et un cylindre adjacent de contre-pression (5), agencé à la même hauteur que le premier, qui forme un cylindre hydrauliquement soutenu de l'intérieur et pourvu d'un revêtement élastique (10). La bande (1) traverse verticalement du haut vers le bas la fente d'estampage (3) formée entre les cylindres à estamper (4, 5). Un cylindre classique de refroidissement bombé (11) est agencé sous le cylindre à contre-pression (5).
EP19900900058 1989-01-07 1989-12-20 Calandre a estamper Withdrawn EP0452337A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3900294 1989-01-07
DE19893900294 DE3900294A1 (de) 1989-01-07 1989-01-07 Praegekalander

Publications (1)

Publication Number Publication Date
EP0452337A1 true EP0452337A1 (fr) 1991-10-23

Family

ID=6371664

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900900058 Withdrawn EP0452337A1 (fr) 1989-01-07 1989-12-20 Calandre a estamper

Country Status (3)

Country Link
EP (1) EP0452337A1 (fr)
DE (1) DE3900294A1 (fr)
WO (1) WO1990007417A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2049256A1 (fr) * 1990-08-22 1992-02-23 Masao Moriyama Machine a extrusion conique et jumelee
CH682893A5 (de) * 1991-05-03 1993-12-15 Escher Wyss Ag Walze und Kunststoffolien-Giessanlage mit einer Walze.
SG75890A1 (en) * 1997-11-14 2000-10-24 Gen Electric Finishing roll sleeve for extruded thermoplastic film
DE10232076A1 (de) * 2002-07-15 2004-02-05 Andreas Lewandowski Beheizbare Rolle, insbesondere für Laminatoren
US20070013100A1 (en) * 2005-07-13 2007-01-18 Capaldo Kevin P Method for producing plastic film
DE102008056500A1 (de) 2008-11-08 2010-05-12 Innova-Paper-Form Gmbh Verfahren und Vorrichtung zur Strukturierung von Materialien
CN105415955B (zh) * 2015-12-03 2018-05-25 上海优珀斯材料科技有限公司 一种在线自修复压纹装置

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD15918A (fr) *
DE1251188B (de) * 1967-09-28 Dornbusch &. Co , Krefeld Prägewalze fur die Behandlung von insbesondere thermoplastischen Warenbahnen
FR524743A (fr) * 1920-09-22 1921-09-09 Maurice Cartiaux Perfectionnements aux machines servant à la fabrication du carton rayé ou gaufré
US1879237A (en) * 1931-01-20 1932-09-27 Agfa Ansco Corp Production of lenticular elements on films
US2609568A (en) * 1950-10-20 1952-09-09 Perkins & Son Inc B F Apparatus and method of embossing thermoplastic sheets
US3119324A (en) * 1960-08-29 1964-01-28 Beloit Iron Works Controlled deflection roll
US3483057A (en) * 1967-12-27 1969-12-09 Grace W R & Co Apparatus and process for producing an embossed plastic laminate
GB1393526A (en) * 1971-05-07 1975-05-07 Smith & Nephew Res Embossing of film
DE2230139B2 (de) * 1971-06-28 1980-01-31 Escher Wyss Ag, Zuerich (Schweiz) Walze mit Durchbiegungsausgleich für die Druckbehandlung von bahnförmigen Materialien
FR2322710A1 (fr) * 1973-01-12 1977-04-01 Ethyl Corp Procede de gaufrage de matieres plastiques
CH565600A5 (fr) * 1973-06-15 1975-08-29 Escher Wyss Ag
DE3003395C2 (de) * 1980-01-31 1983-04-07 Küsters, Eduard, 4150 Krefeld Verfahren zur Steuerung der Liniendruckverteilung einer Walze und entsprechende Walze
CH662837A5 (de) * 1983-02-10 1987-10-30 Escher Wyss Ag Kalander zur druck- und waermebehandlung von warenbahnen.
DE3421800C1 (de) * 1984-06-12 1986-04-17 Maschinen und Werkzeugbau Michael Brümmer GmbH, 8804 Dinkelsbühl Elastische Walze zum Behandeln einer thermoplastischen Folie
DE3640902A1 (de) * 1986-11-29 1988-06-16 Kuesters Eduard Maschf Walze mit steuerbarem liniendruck

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9007417A1 *

Also Published As

Publication number Publication date
DE3900294C2 (fr) 1991-05-08
WO1990007417A1 (fr) 1990-07-12
DE3900294A1 (de) 1990-07-12

Similar Documents

Publication Publication Date Title
EP2098381B1 (fr) Procédé et dispositif destinés à imprégner des pièces à usiner
EP0447651B1 (fr) Rouleau à règlage de flexion
DE3020669A1 (de) Verfahren zur steuerung der liniendruckverteilung in einer walzeinrichtung sowie entsprechende walzeinrichtung
DE602004012548T2 (de) Variable kronenwalze für vorrichtungen zur bearbeitung von endlosbahnmaterial und die walze umfassende vorrichtung
DE3928439C2 (de) Durchbiegungseinstellwalze
DE3640902C2 (fr)
EP0452337A1 (fr) Calandre a estamper
DE3838852C1 (fr)
EP0149108B1 (fr) Montage de rouleau
EP0372178B1 (fr) Calandre
DE10023291A1 (de) Beheizbare oder kühlbare Walze zur Temperaturbehandlung von Materialbahnen, insbesondere zur Verwendung für Wellpappemaschinen
DE4119543A1 (de) Luftabdichtung fuer eine maschine zum herstellen von wellpappe
DE4017433A1 (de) Walzenpresse
DE4342341C1 (de) Breitdehnvorrichtung
DE19548865C2 (de) Kalander
DE4042365C2 (de) Durchbiegungseinstellwalze
DE69924466T2 (de) Abstreifvorrichtung für flüssigkeiten
DE2853285A1 (de) Vorrichtung zum aufbringen einer flaechenpressung auf fortschreitende werkstuecke mit mindestens einem umlaufenden pressband
EP0791105B1 (fr) Appareillage de couchage
DE904150C (de) Walzvorrichtung, insbesondere Florquetsche
DE8815224U1 (de) Walzenvorrichtung
DE9205796U1 (de) Walze mit Stützleiste
DE10050348C2 (de) Walzenanordnung, insbesondere Riffelwalzenanordnung
DE19738356A1 (de) Einrichtung zum Abstreifen oder/und Dosieren eines flüssigen bis pastösen Mediums auf einer sich vorbeibewegenden Arbeitsfläche; Stichwort: Schwimmendes Rakel
DE3404623C2 (fr)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19910626

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE IT

17Q First examination report despatched

Effective date: 19920924

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19930123