EP2572807B1 - Procédé de fabrication d'une feuille en aluminium dotée de caractéristiques de sécurité intégrées - Google Patents

Procédé de fabrication d'une feuille en aluminium dotée de caractéristiques de sécurité intégrées Download PDF

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Publication number
EP2572807B1
EP2572807B1 EP11450126.5A EP11450126A EP2572807B1 EP 2572807 B1 EP2572807 B1 EP 2572807B1 EP 11450126 A EP11450126 A EP 11450126A EP 2572807 B1 EP2572807 B1 EP 2572807B1
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EP
European Patent Office
Prior art keywords
rolling
aluminum foil
aluminum
roll
produced
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.)
Active
Application number
EP11450126.5A
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German (de)
English (en)
Other versions
EP2572807A1 (fr
Inventor
Christof Brunnthaller
Rainer Huber
Martin Kornfeld
Adolf Schedl
Lambert Nekula
Wilhelm Zuser
Engelbert Scharner
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.)
Constantia Teich GmbH
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Constantia Teich 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
Priority to PL11450126T priority Critical patent/PL2572807T3/pl
Application filed by Constantia Teich GmbH filed Critical Constantia Teich GmbH
Priority to ES11450126.5T priority patent/ES2492520T3/es
Priority to SI201130265T priority patent/SI2572807T1/sl
Priority to EP11450126.5A priority patent/EP2572807B1/fr
Priority to CA2819772A priority patent/CA2819772C/fr
Priority to MX2014003290A priority patent/MX348425B/es
Priority to CN201280045954.3A priority patent/CN103889604B/zh
Priority to JP2014531043A priority patent/JP5996653B2/ja
Priority to KR1020147008212A priority patent/KR101975313B1/ko
Priority to US14/346,767 priority patent/US20140322557A1/en
Priority to PCT/AT2012/000222 priority patent/WO2013040612A1/fr
Priority to RU2013122467/02A priority patent/RU2598413C2/ru
Publication of EP2572807A1 publication Critical patent/EP2572807A1/fr
Application granted granted Critical
Publication of EP2572807B1 publication Critical patent/EP2572807B1/fr
Priority to HRP20140861AT priority patent/HRP20140861T1/hr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H8/00—Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects, e.g. checkered sheets
    • B21H8/005—Embossing sheets or rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/227—Surface roughening or texturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/001—Aluminium or its alloys
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/30—Foil or other thin sheet-metal making or treating
    • Y10T29/301—Method
    • Y10T29/302—Clad or other composite foil or thin metal making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12431—Foil or filament smaller than 6 mils

Definitions

  • the invention relates to a method for producing an aluminum foil with integrated security features, wherein an aluminum foil is rolled in several cold rolling passes to a thickness of less than 150 microns, and at the same time on both surface sides of the aluminum foil, a texturing running in the rolling direction.
  • a specially structured area on a film surface is proposed as a security feature.
  • the structuring takes place by rolling the film surface.
  • the rolling parameters must be set precisely, otherwise an undesirable deformation of the film surface can take place.
  • the invention aims to remedy this situation.
  • a method of the type mentioned is proposed, which is characterized in that at least two aluminum foils, a loose composite is formed, which is supplied in a last cold roll pass a pair of work rolls, wherein at least one roll surface in the rolling direction by grinding produced relief-like surface structure depending on the contrast and the subject was reduced in a range of 10 to 50% based on the average surface roughness to form a motif for a security feature, which is transferred to the roll surface facing surface side of the aluminum foils, after which the loose composite of aluminum foils is separated.
  • FIG. 1 a pair of work rolls for carrying out the method according to the invention
  • FIG. 2 a detailed view of a work roll and its surface design
  • FIG. 3 the Striebeckkurve for documentation of the relevant process parameters in the nip
  • FIG. 4 the procedure for producing the integrated security features.
  • FIGS. 5 to 8 show possible embodiments for the integrated security feature.
  • the manufacturing process of the aluminum foil 1 with integrated security features 6 initially consists of the sub-processes continuous casting, homogenizing, hot rolling, cold rolling and subsequent annealing above the recrystallization temperature. This is followed by the process of film cold rolling.
  • the aluminum foil 4 is rolled in several cold rolling passes to a thickness of less than 150 .mu.m, wherein at the same time on both surface sides 4a, 4b of the aluminum foil extending in the rolling direction texturing 5a, 5b, see FIG. 4b ,
  • This structured roughness formed in the direction of travel leads to a directed reflection of the incident light, so that the surface sides 4a and 4b have a glossy appearance due to this directed reflection.
  • FIG. 1 such as FIG. 4a
  • a pair of work rolls 9 in which at least one roll surface has a motif 6 'for the security feature.
  • This motif 6 ' is produced insofar as the relief-like surface structuring 11a produced in the rolling direction by grinding is reduced in a range of 10 to 50%, based on the average surface roughness, in a contrast- and subject-dependent manner. This can be done for example under the action of laser beams, see FIGS. 2b . 2c and 4c ,
  • a loose composite 8 is formed, for example, from two glossy aluminum foils 4 via a release agent 7, see FIGS.
  • the side facing away from the roll surface surface side 2b of the aluminum foil 1 is characterized by the release agent 7 and by the second aluminum foil - for reasons of clarity with 4 '- covered.
  • the contact sides of the two films are characterized by the rolling marks of the previous one Walzstichs and by the doubled rolling newly created roughness, which is mainly aligned transversely to the direction. Due to the random texturing of these surfaces, diffuse scattering occurs.
  • the aluminum foil 4 ' has a directed structuring 5'a on its surface side 4'a, so that this surface side appears shiny, whereas the second surface side 4'b has a random structure and therefore has a matte surface.
  • the film rolls underlying the process according to the invention belong to the subgroup "flat rolls", and are defined in particular by process end products having a thickness of 20 ⁇ m.
  • the cold rolling process in this thickness range requires the specific use of surface roughness of tools in combination with process fluids to produce the tribological conditions required for plastic deformation in the roll nip.
  • the abscissa shows the friction coefficient, the ordinate the function of speed, pressure and viscosity.
  • the mixed friction area is required. In the area of low lubrication, there is constant contact with the rolling stock; a reduction of the material is not possible in this area, and subsequently leads to poor surface properties and damage to the roller.
  • the work roll 11 In the field of hydrodynamic lubrication - see also Reference 14 Fig. 2a - The work roll 11 "floats", so that a targeted control of the rolling process and in particular the reduction of the material thickness is no longer possible. By varying the parameters v, p and n, one can therefore set the range of mixed friction.
  • the reduction resulting from the process and thus the strip thickness in the roll outlet are regulated by means of the primary parameter entry-tension (intake run), since these act against the deformation resistance of the aluminum foil 4.
  • the secondary control parameter rolling speed is used to vary the lubricant film thickness (hydrodynamic lubricant intake).
  • a mixed friction condition is sought, which is characterized by the simultaneous occurrence of boundary friction and fluid friction.
  • fluid friction that is hydrodynamic lubrication 14
  • both surfaces are completely separated.
  • the transferred shear stress depends on the dynamic viscosity of the lubricant and the speed difference between the work roll and the aluminum foil.
  • boundary friction the two surfaces are only separated by a layer of lubricant that is only a few molecules thick, with the viscosity of the lubricant playing only a minor role.
  • the ratio between boundary friction and fluid friction over the length of the nip depends on the layer thickness of the drawn-in lubricant and the roughness of the work roll and the aluminum foil.
  • the mechanisms for influencing the lubricating film thickness 13 are determined by the hydrodynamic lubricant intake, the entry of lubricant into the roughness valleys 11 b and the attachment of lubricant particles influenced, see Fig. 2b ,
  • the hydrodynamic lubricant entry 14 takes place primarily in the inlet zone to the nip 9 '.
  • the inlet zone forms a wedge-shaped gap 12, wherein the work roll 11 and the aluminum foil 4 entrain lubricant 13 in the form of a film as delimiting surfaces as they move in the direction of the wedge tip, see Fig. 2a .
  • the resulting in rolling oil hydrodynamic pressure build-up depends on the rolling speed, the viscosity of the lubricant and the geometry of the nip.
  • This mechanism can be used for the targeted change of the friction conditions, and subsequently serves to produce an altered surface texture due to the resulting fluid friction. This is done by the lack of contact of the work roll and the lack of texturing in the rolling direction.
  • the combination of the above effects makes it possible to bring the lubricating film thickness and the concomitant change in the tribological conditions in the nip from the mixed friction region in the region of the motif into the hydrodynamic region by means of targeted and partial destruction of the grinding structure of the work roll.
  • This causes the work roll to float, resulting in a random texture which hardly differs measurably in the measured roughnesses, but because of the reflective properties it is visually distinct from the other surface areas, which have a patterned in the rolling direction surface by the partial contact with the work roll.
  • the manufactured aluminum foil 1 with integrated security features 6 is photographed for analysis purposes in several passes with optical methods.
  • representative foil samples in A4 format are produced.
  • epoxy resin impressions of the surface are made and measured by means of incident light microscope and InfiniteFocus.
  • FIG. 5 the representation of a security feature 6 consisting of the word security in connection with the usual in the medical industry representation of an Aesculapian. This is of course presented here as an example without any right of exclusion. In any case, it is important to note that the in Fig. 5b represented surface side, which was facing away from the roll surface during the rolling process, has no undesirable negative pressure motifs of the aforementioned security feature.
  • Fig. 6 is a fanciful representation of a security feature 6 indicated, where in the section B, see Fig. 6b , it should be noted that in the area of the security feature 6, a matt surface, but in the respective adjacent surface areas, the structuring 3 is maintained in the longitudinal direction, whereby the surface appears shiny.
  • FIG. 7 a representation of a security feature taken by scanning electron microscopy 6.
  • the surface is dull, whereas in the adjacent surface areas the surface appears shiny.
  • the detailed views according to FIGS. 7a and FIG. 7b show that this different effect is caused by the surface being rough in the area of the security feature 6, but longitudinally structured in the adjacent areas.
  • FIG. 8 shown representation of an aluminum foil 1 according to the invention with integrated security feature 6 security after the infinitive focus analysis. Also from the respective representations according to 8a, 8b, 8c and 8d can be seen that in the area of the security feature 6 a random texturing, whereas in the adjacent area a directional structuring 13 is present.
  • the surface structure of the aluminum foil 4 is changed during the forming process, which makes it possible to design the surface with one or more security features 6.
  • An imitation by common finishing technologies is not possible or as such easily identified.
  • the production and further processing of the aluminum foil 1 with integrated security features 6 does not differ in terms of the number of production steps from the processing of conventional, hard-rolled aluminum foils and can thus easily be implemented in the production process customary for pharmaceutical products.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Laminated Bodies (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Claims (5)

  1. Procédé de fabrication d'un film d'aluminium (1) à caractéristiques de sécurité intégrées (6), un film d'aluminium (4) étant laminé en plusieurs passes de laminage à froid jusqu'à une épaisseur de moins de 150 µm et une texturation (5a, 5b) s'étendant dans le sens de laminage étant réalisée en même temps sur les deux faces superficielles (4a, 4b) du film d'aluminium, caractérisé en ce qu'est constitué à partir d'au moins deux de ces films d'aluminium (4) un composite détaché (8) qui est acheminé dans une dernière passe de laminage à froid vers une paire de rouleaux opérationnels (9) dans laquelle, sur au moins une surface des rouleaux (11), la structuration superficielle (11a) en relief générée par meulage dans le sens de laminage a été réduite en fonction du contraste et du motif dans une plage (6') de 10 à 50 % par rapport à la rugosité moyenne pour former un motif pour une caractéristique de rugosité (6) qui est transférée vers la face superficielle (2a) tournée vers la surface des rouleaux du film d'aluminium, après quoi le composite détaché (8) est séparé des films d'aluminium (1, 4').
  2. Procédé selon la revendication 1, caractérisé en ce que la dernière passe de laminage à froid est réalisée avec l'entrefer fermé (9') et une plage de friction mixte définie à partir des paramètres de coefficient de friction, viscosité dynamique de l'huile de laminage, vitesse de laminage et pression de laminage est établie et que, en même temps, dans l'entrefer fermé (9'), sont appliquées sur le film d'aluminium (4) des tensions de traction longitudinale qui agissent contre la résistance au changement de forme des films d'aluminium.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que, pour la dernière passe de laminage à froid sur la surface des rouleaux (11), la structuration superficielle (11a) en relief générée dans le sens de laminage a été réduite par irradiation au laser dans sa rugosité moyenne.
  4. Procédé selon une des revendications 1 à 3, caractérisé en ce que, à condition qu'il y ait un agent séparateur (7) dans les films d'aluminium utilisés (4), il n'y a pas de compression indésirable du motif (6') pour la caractéristique de sécurité (6) sur l'autre face superficielle (2b) du film d'aluminium (1).
  5. Procédé selon une des revendications 1 à 4, caractérisé en ce que, en raison des conditions tribologiques régnant dans l'entrefer fermé (9'), les propriétés physiques et/ou chimiques des films d'aluminium (4) restent inchangées même dans le produit final (1) obtenu par le procédé.
EP11450126.5A 2011-09-22 2011-09-22 Procédé de fabrication d'une feuille en aluminium dotée de caractéristiques de sécurité intégrées Active EP2572807B1 (fr)

Priority Applications (13)

Application Number Priority Date Filing Date Title
ES11450126.5T ES2492520T3 (es) 2011-09-22 2011-09-22 Procedimiento para fabricar una lámina de aluminio con características de seguridad integradas
SI201130265T SI2572807T1 (sl) 2011-09-22 2011-09-22 Postopek za izdelavo aluminijeve folije z integriranimi varnostnimi značilnostmi
EP11450126.5A EP2572807B1 (fr) 2011-09-22 2011-09-22 Procédé de fabrication d'une feuille en aluminium dotée de caractéristiques de sécurité intégrées
PL11450126T PL2572807T3 (pl) 2011-09-22 2011-09-22 Sposób wytwarzania folii aluminiowej ze zintegrowanymi cechami zabezpieczającymi
RU2013122467/02A RU2598413C2 (ru) 2011-09-22 2012-08-27 Способ изготовления алюминиевой фольги с интегрированными защитными элементами
CN201280045954.3A CN103889604B (zh) 2011-09-22 2012-08-27 用于制造带有集成的安全标志的铝箔的方法
CA2819772A CA2819772C (fr) 2011-09-22 2012-08-27 Procede de production d'une feuille d'aluminium a signes de securite integres
KR1020147008212A KR101975313B1 (ko) 2011-09-22 2012-08-27 통합된 보안 특징들을 구비한 알루미늄 호일 제조 방법
US14/346,767 US20140322557A1 (en) 2011-09-22 2012-08-27 Method for producing an aluminum foil with integrated security features
PCT/AT2012/000222 WO2013040612A1 (fr) 2011-09-22 2012-08-27 Procédé de production d'une feuille d'aluminium à signes de sécurité intégrés
MX2014003290A MX348425B (es) 2011-09-22 2012-08-27 Método para producir una lámina delgada de aluminio con características de seguridad integradas.
JP2014531043A JP5996653B2 (ja) 2011-09-22 2012-08-27 統合されたセキュリティ機能を有するアルミフォイルを製造するための方法
HRP20140861AT HRP20140861T1 (hr) 2011-09-22 2014-09-11 Postupak za proizvodnju aluminijske folije s integriranim sigurnosnim znaäśajkama

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11450126.5A EP2572807B1 (fr) 2011-09-22 2011-09-22 Procédé de fabrication d'une feuille en aluminium dotée de caractéristiques de sécurité intégrées

Publications (2)

Publication Number Publication Date
EP2572807A1 EP2572807A1 (fr) 2013-03-27
EP2572807B1 true EP2572807B1 (fr) 2014-06-11

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EP11450126.5A Active EP2572807B1 (fr) 2011-09-22 2011-09-22 Procédé de fabrication d'une feuille en aluminium dotée de caractéristiques de sécurité intégrées

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Country Link
US (1) US20140322557A1 (fr)
EP (1) EP2572807B1 (fr)
JP (1) JP5996653B2 (fr)
KR (1) KR101975313B1 (fr)
CN (1) CN103889604B (fr)
CA (1) CA2819772C (fr)
ES (1) ES2492520T3 (fr)
HR (1) HRP20140861T1 (fr)
MX (1) MX348425B (fr)
PL (1) PL2572807T3 (fr)
RU (1) RU2598413C2 (fr)
SI (1) SI2572807T1 (fr)
WO (1) WO2013040612A1 (fr)

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AT512773B1 (de) 2012-10-29 2013-11-15 Constantia Teich Gmbh Verfahren zum Herstellen einer Aluminiumfolie mit integrierten Sicherheitsmerkmalen
EP3238843A1 (fr) * 2016-04-29 2017-11-01 Primetals Technologies Austria GmbH Procede de laminage d'un produit de laminage
CN108856291A (zh) * 2018-05-17 2018-11-23 河钢股份有限公司承德分公司 一种强度750MPa级极薄花纹板的轧制方法
CN113634607B (zh) * 2021-07-01 2023-09-22 乳源东阳光优艾希杰精箔有限公司 一种铝箔轧机轧制油及其在铝箔制备中的应用
CN118002625B (zh) * 2024-04-09 2024-06-21 太原理工大学 一种不锈钢带改性轧制压下率确定方法、装置及设备

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RU2506188C2 (ru) * 2008-08-05 2014-02-10 Алкоа Инк. Металлические листы и пластины с текстурированными поверхностями, уменьшающими трение, и способы их изготовления

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US20140322557A1 (en) 2014-10-30
SI2572807T1 (sl) 2014-10-30
RU2013122467A (ru) 2014-11-20
KR20140077159A (ko) 2014-06-23
MX348425B (es) 2017-06-12
PL2572807T3 (pl) 2014-11-28
CA2819772A1 (fr) 2013-03-28
JP2015502254A (ja) 2015-01-22
ES2492520T3 (es) 2014-09-09
CN103889604A (zh) 2014-06-25
MX2014003290A (es) 2014-12-05
KR101975313B1 (ko) 2019-08-28
EP2572807A1 (fr) 2013-03-27
CN103889604B (zh) 2016-12-28
CA2819772C (fr) 2015-08-11
WO2013040612A1 (fr) 2013-03-28
JP5996653B2 (ja) 2016-09-21
RU2598413C2 (ru) 2016-09-27

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