EP1401633A1 - Moule de coulee et utilisation d'une couche superficielle ayant subie une oxydation anodique - Google Patents

Moule de coulee et utilisation d'une couche superficielle ayant subie une oxydation anodique

Info

Publication number
EP1401633A1
EP1401633A1 EP02745419A EP02745419A EP1401633A1 EP 1401633 A1 EP1401633 A1 EP 1401633A1 EP 02745419 A EP02745419 A EP 02745419A EP 02745419 A EP02745419 A EP 02745419A EP 1401633 A1 EP1401633 A1 EP 1401633A1
Authority
EP
European Patent Office
Prior art keywords
cavities
layer
casting
surface layer
casting mold
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Withdrawn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
EP02745419A
Other languages
German (de)
English (en)
Inventor
Thomas Sawitowski
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.)
Alcove Surfaces GmbH
Original Assignee
Alcove Surfaces 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 Alcove Surfaces GmbH filed Critical Alcove Surfaces GmbH
Publication of EP1401633A1 publication Critical patent/EP1401633A1/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Withdrawn legal-status Critical Current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
    • B29C59/022—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing characterised by the disposition or the configuration, e.g. dimensions, of the embossments or the shaping tools therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/061—Materials which make up the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • 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
    • B29C59/022—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing characterised by the disposition or the configuration, e.g. dimensions, of the embossments or the shaping tools therefor
    • B29C2059/023—Microembossing

Definitions

  • the present invention relates to a casting mold according to the preamble of claim 1 and a use according to the preamble of claim 6.
  • the nanometer range means profiles or structuring with structure widths ⁇ 1000 nm, in particular ⁇ 500 ⁇ m, preferably at least 1 or 10 nm.
  • the structure width denotes the extent to which individual structure elements, such as surveys, are repeated regularly, in particular. H. thus for example the center distance of mutually adjacent elevations or depressions which are adjacent to one another.
  • lithographic processes for structuring can only be used to a very limited extent. It should be noted here that the wavelength of visible light alone is already 400 to 750 nm. In any case, the lithographic processes are very complex.
  • the post-published DE 100 20 877 Cl discloses the use of a surface layer with cavities formed by anodic oxidation as a die during embossing.
  • the present invention has for its object a casting mold and the use of an open cavity by anodic oxidation
  • BESTATIGUNGSKOPIE Specify provided surface layer, a structuring of a casting or workpiece in the nanometer range is made possible in a simple, inexpensive manner.
  • An essential idea of the present invention is to use a porous oxide layer, in particular a surface layer with open cavities, which are formed by anodic oxidation directly or without a template, that is to say independently of a cathode shape, as the mold surface or inner surface of a casting mold.
  • an oxide layer in particular the aluminum oxide that is preferably provided, is relatively hard. This is advantageous in view of the often very high loads during casting or molding, in order to be able to produce workpieces of a wide variety of materials and to achieve a long service life for the casting mold.
  • the template-free oxidation is very simple and inexpensive to implement.
  • the creation of the cavities (quasi) regardless of the shape and arrangement of the cathode used, that is, a template or negative form is not required.
  • the proposed template-free formation of open cavities by anodic oxidation enables the production of structures in the nanometer range in a very simple, inexpensive manner.
  • structure widths of 500 nm and less, even of 100 nm and less, are made possible.
  • the arrangement - regular or irregular - and the surface density of the cavities can be varied as required.
  • the anodized surface layer can be used directly, that is to say without further molding, as the mold surface of a casting mold.
  • the figure shows a very schematic partial sectional view of a proposed casting mold 1 with an at least partially structured, that is profiled or relief-like inner surface or molded surface 2.
  • the surface 2 is formed by an upper or flat side of a surface layer 3, which with open, through Anodic generated cavities 4 is provided.
  • the surface layer 3 is applied to a carrier 5 of the casting mold 1.
  • the surface layer 3 is applied to the carrier 5 by plasma coating.
  • the surface layer 3 can also be formed directly by the carrier 5, that is to say be a surface region of the carrier 5.
  • the surface layer 3 can also be deposited on the carrier 5 by other methods.
  • the surface layer 3 is preferably made of aluminum, which is applied to the carrier 5 in particular by plasma coating and adheres very well to the carrier 5, which preferably consists of metal, in particular iron or steel.
  • the surface layer 3 is at least partially anodically oxidized to the depth of a cover layer 6 in the illustrated example, as a result of which the cavities 4 are formed directly in the surface layer 3 or cover layer 6.
  • the cavities 4 are formed directly or without templates, ie the arrangement, distribution, shape and the like. The like.
  • the cavities 4 - in contrast to the Elysier - is therefore at least essentially independent of the surface shape and proximity of the cathode used (not shown) during the oxidation.
  • valve effect namely the independent formation of the cavities 4 that occurs when the surface layer 3 is oxidized or anodized - at least in particular in the case of the so-called valve metals.
  • this direct or template-free creation of the cavities 4 does not preclude additional (previous or later) shaping or structuring of the surface 2 or the cavities 4 by a negative shape.
  • the surface layer 3 can correspond to the oxidized cover layer 6.
  • the intermediate layer 7 made of aluminum in the example shown, which provides very good adhesion between the cover layer 6 and the carrier 5, can be omitted.
  • the uncoated carrier 5 can be anodically oxidized on its surface forming the surface 2 to form a porous oxide layer or cavities 4.
  • a support 5 made of iron or steel, in particular stainless steel.
  • the surface layer 3 corresponds to the cover layer 6, that is to say the oxidized layer.
  • silicon and titanium and other valve metals can also be used, for example. In the example shown, the proportions are not shown to scale.
  • the surface 2 preferably has a structure width S in the nanometer range, in particular from 30 to 600 nm and preferably from 50 to 200 nm.
  • the cavities 4 or their openings have an average diameter D of essentially 10 to 500 nm, preferably 15 to 200 nm and in particular 20 to 100 nm.
  • the cavities 4 are essentially elongated, their depth T preferably being at least approximately 0.5 times the aforementioned average diameter D and in particular approximately 1.0 to 10 times the diameter D.
  • the cavities 4 are at least substantially uniform here.
  • the cavities 4 are essentially cylindrical.
  • the cavities 4 can also have a different shape, for example be essentially conical.
  • the cavities 4 can also have a cross section that varies in shape and / or diameter over their depth T.
  • the cavities 4 can each be substantially conical as a rough structure and can be provided with many fine depressions (small cavities) along their walls to form a fine structure.
  • the cavities 4 are preferably arranged at least substantially regularly distributed over the surface of the surface layer 3 or over the surface 2. However, an irregular distribution can also be considered.
  • the cavities or their openings are preferably distributed over the surface 2 with a surface density of 10 9 to 10 ⁇ / cm 2 .
  • the areal density is essentially constant over area 2.
  • the areal density can also vary in areas on area 2 as required.
  • the area of the openings of the cavities 4 is preferably at most 50% of the expansion area of the area 2. This results in a sufficiently high stability or resilience of the area 2 or the surface layer 3 / cover layer 6 in view of the sometimes high ones occurring during molding or casting Stresses reached.
  • the shape, arrangement, areal density and the like of the cavities 4 can be controlled by appropriate selection of the process conditions during anodizing.
  • the shape of the cavities 4 can be influenced by varying the voltage.
  • galvanostatic oxidation - i.e. H. with at least substantially constant current - to an approximately conical or hill-like shape of the cavities 4, so that a kind of "moth eye structure" or the like can be formed in this way.
  • the cavities 4 can vary in their shape, depth and / or area density over the area 2, in particular in certain areas, or can be formed on the area 2 only in areas.
  • the surface 2 can also be modified before and / or after the oxidation - that is to say the creation of the cavities 4 - for example by lithographic processes, etching and / or other, preferably material-removing processes, in order, for example, to have a rough structure in the form of webs, webs, Generate areas with or without cavities 4, large-scale elevations or depressions and the like on the surface 2.
  • mechanical processing and / or chemical expansion can also be carried out, in particular by partially etching away oxide material.
  • the surface ratio of the opening areas of the cavities 4 to the extension area of the area 2 can be varied or enlarged.
  • this also makes other modifications of the surface 2 or the cavities 4 possible, depending on the exposure time and intensity.
  • a particular advantage of the proposed solution is that the surface 2 can have virtually any shape.
  • the figure also shows a cast part or workpiece 8, likewise in a greatly simplified, not to scale sectional view, in the already finished state, that is to say after casting with a surface 9 already structured by the casting mold 1.
  • the proposed casting mold 1 permits a very fine structuring of the workpiece 8 or its surface 9. It is possible, for example, to have relatively large elevations in the range from 0.1 to 50 ⁇ m with several relatively small projections, for example in the area, on the surface 9 from 10 to 400 nm, on the surface 9 of the workpiece 8.
  • the proposed solution enables a very fine structuring of the surface 9 in a very simple, cost-effective manner. Accordingly, there is a very wide range of applications. For example, such, in particular very fine structuring in the case of antireflection layers, can be used or used to change the radiation emission of structured surfaces, in sensors, in catalysis, in the case of self-cleaning surfaces, in improving surface wettability and the like.
  • the proposed solution can be used for casting with a quasi-arbitrary material, since aluminum oxide in particular is very resistant mechanically, thermally and / or chemically.
  • an essential aspect of the present invention is to cast or mold a surface layer with cavities formed directly or without a template by anodic oxidation in order to enable surface structuring in the nanometer range.
  • the present invention is not restricted to a casting mold 1 in the narrower sense.
  • the surface layer 3 or cover layer 6 is to be understood as a template for a general structuring of a surface, a tool, a workpiece or the like in the nanometer range.
  • any desired impression of the template can be made.
  • reshaping is not necessary when molding.
  • the structure can be molded by casting or the like.
  • the workpiece 8 to be produced with the structured surface 9 can then be a cast part, the structuring of the surface 9 being carried out by casting or pouring or other molding of the casting mold 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

L'invention concerne un moule de coulée (1) et une utilisation d'une couche superficielle (3) ayant subie une oxydation anodique. L'objectif de l'invention est de permettre la réalisation d'une structuration simple et économique d'une surface, de l'ordre du nanomètre. A cet effet, une couche superficielle (3) présentant des cavités (4) formées sans modèle par oxydation anodique est façonnée par coulée.
EP02745419A 2001-07-02 2002-07-01 Moule de coulee et utilisation d'une couche superficielle ayant subie une oxydation anodique Withdrawn EP1401633A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10131513 2001-07-02
DE10131513 2001-07-02
DE10154756 2001-11-09
DE10154756A DE10154756C1 (de) 2001-07-02 2001-11-09 Verwendung einer anodisch oxidierten Oberflächenschicht
PCT/EP2002/007240 WO2003004253A1 (fr) 2001-07-02 2002-07-01 Moule de coulee et utilisation d'une couche superficielle ayant subie une oxydation anodique

Publications (1)

Publication Number Publication Date
EP1401633A1 true EP1401633A1 (fr) 2004-03-31

Family

ID=26009612

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02745419A Withdrawn EP1401633A1 (fr) 2001-07-02 2002-07-01 Moule de coulee et utilisation d'une couche superficielle ayant subie une oxydation anodique

Country Status (3)

Country Link
EP (1) EP1401633A1 (fr)
DE (1) DE10154756C1 (fr)
WO (1) WO2003004253A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20030167A1 (it) * 2003-03-06 2004-09-07 Fiat Ricerche Procedimento per la realizzazione di emettitori nano-strutturati per sorgenti di luce ad incandescenza.
DE10314373A1 (de) 2003-03-28 2004-10-07 Rwth Aachen Urfomverfahren für ein Bauteil mit Mikrostruktur-Funktionselement
KR101190657B1 (ko) 2003-04-21 2012-10-15 삼성전자주식회사 자기 정렬된 나노 채널-어레이의 제조방법 및 이를 이용한 나노 도트의 제조방법
US7649198B2 (en) 2005-12-28 2010-01-19 Industrial Technology Research Institute Nano-array and fabrication method thereof
EP1970347A1 (fr) * 2007-03-16 2008-09-17 C.R.F. Societa Consortile per Azioni Procédé de fabrication de particules micro- ou nanometriques.
US20140272295A1 (en) * 2013-03-14 2014-09-18 Sdc Technologies, Inc. Anti-fog nanotextured surfaces and articles containing the same

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
CH251451A (fr) * 1940-07-01 1947-10-31 Parlanti Conrad Anthony Procédé pour l'obtention d'objets métalliques moulés.
BE514705A (fr) * 1951-06-25
JPH0825026A (ja) * 1994-07-11 1996-01-30 Nibetsukusu Kk アルミニウム鋳造用の整流材料及びこれを用いた整流体
WO1996015295A1 (fr) * 1994-11-16 1996-05-23 Kabushiki Kaisha Kobe Seiko Sho Chambre a vide en aluminium ou en un alliage de ce metal et traitement de surface et matiere pour la chambre a vide
CH689395A5 (de) * 1995-03-16 1999-03-31 Alusuisse Lonza Services Ag Verfahren zur kontinuierlichen anodischen Oxidation von Baendern oder Draehten aus Aluminium.
JPH0967173A (ja) * 1995-08-31 1997-03-11 Univ Tohoku 多孔性アルミナチューブの製造方法
DE69738752D1 (de) * 1996-08-26 2008-07-17 Nippon Telegraph & Telephone Verfahren zur herstellung poröser, anodisierter aluminiumfilme
FR2762862B1 (fr) * 1997-04-30 1999-07-16 Guial Procede de fabrication d'un cylindre de calandrage et feuilles du films thermoplastiques obtenus par laminage d'une resine thermoplastique au moyen d'un tel cylindre
DE19727132C2 (de) * 1997-06-26 2000-02-03 Hueck Engraving Gmbh Verfahren und Vorrichtung zur Herstellung einer Prägestruktur auf einem der Oberflächenformung von Preßlaminaten dienenden Prägewerkzeug
DE29722268U1 (de) * 1997-12-17 1998-03-05 Unicor GmbH Rahn Plastmaschinen, 97437 Haßfurt Formbacken aus Aluminium oder Aluminiumlegierung
JP4532634B2 (ja) * 1998-12-25 2010-08-25 キヤノン株式会社 細孔の製造方法
DE10020877C1 (de) * 2000-04-28 2001-10-25 Alcove Surfaces Gmbh Prägewerkzeug, Verfahren zum Herstellen desselben, Verfahren zur Strukturierung einer Oberfläche eines Werkstücks und Verwendung einer anodisch oxidierten Oberflächenschicht

Non-Patent Citations (2)

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Title
See also references of WO03004253A1 *
WORDIQ DICTIONARY AND ENCYCLOPEDIA, pages NANOTECHNOLOGY, Retrieved from the Internet <URL:http://www.wordiq.com/definition/Nanotechnology> [retrieved on 20040622] *

Also Published As

Publication number Publication date
WO2003004253A1 (fr) 2003-01-16
DE10154756C1 (de) 2002-11-21

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