EP0277495B1 - Process for making decorative or informative patterns on objects made of metal sheets with one or possibly several coatings - Google Patents

Process for making decorative or informative patterns on objects made of metal sheets with one or possibly several coatings Download PDF

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Publication number
EP0277495B1
EP0277495B1 EP88100337A EP88100337A EP0277495B1 EP 0277495 B1 EP0277495 B1 EP 0277495B1 EP 88100337 A EP88100337 A EP 88100337A EP 88100337 A EP88100337 A EP 88100337A EP 0277495 B1 EP0277495 B1 EP 0277495B1
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EP
European Patent Office
Prior art keywords
aluminium alloy
bath
layers
layer
process according
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
Application number
EP88100337A
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German (de)
French (fr)
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EP0277495A1 (en
Inventor
Hermann Ritzenhoff
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.)
HERMANN RITZENHOFF Firma
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HERMANN RITZENHOFF Firma
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Publication of EP0277495A1 publication Critical patent/EP0277495A1/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/16—Polishing
    • C25F3/18—Polishing of light metals
    • C25F3/20—Polishing of light metals of aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C3/00—Processes, not specifically provided for elsewhere, for producing ornamental structures
    • B44C3/005—Removing selectively parts of at least the upper layer of a multi-layer article
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/02—Etching
    • C25F3/14—Etching locally

Definitions

  • the invention relates to a method according to the preamble of claim 1 and assumes that sheets can be clad together primarily in the rolling process. This creates a new material made up of two or more layers.
  • This known method is based on the problem of providing the surface of a clad object with a material layer made of aluminum and a material layer made of stainless steel with a colored pattern.
  • the surface of the material layer made of stainless steel to be patterned is coated with a corrosion-resistant film which has the pattern in the form of holes in the film.
  • the surface covered with the film is then etched and polished electrolytically, the outer layer of material being removed during the etching so that the inner layer of material is exposed. Then the exposed inner layer of material is covered with a colored layer, creating the desired pattern.
  • the invention has for its object to develop a method of the type mentioned in such a way that a decorative or informative pattern can be created without additional coating.
  • cladding layers made of aluminum of different composition and different purity can produce decorative or informative patterns of various types by surface treatment in a single treatment bath due to the different reactivity of the layers. It has been found that when aluminum alloys are used as the material for the plating layers, even slightly different compositions result in decorative or informative patterns, even though only one treatment bath is used. This is due to the different reactivity of the individual material layers to the treatment bath.
  • the outer plating layer can be exposed or removed by chemical or mechanical means.
  • the use of one and the same treatment bath, to which the individual plating layers react differently, is essential for achieving the desired effect.
  • use is made of the different response of the differently composed cladding layers to one and the same treatment bath to achieve contrasting effects in the raised and lower layers.
  • Cladding, decorative caps or similar parts are made from two different aluminum alloys made of clad sheets by cold forming, e.g. for cosmetic products formed.
  • a high-gloss layer is provided on the outside and a less-gloss layer is provided on the inside.
  • parts of the outer layer are removed in accordance with the patterns by methods known per se, so that articles are formed whose outer surface is interrupted by the lower-lying surface with a different material composition. If such an article is now placed in a surface treatment bath and there e.g.
  • the result of the treatment in one and the same bathroom are high-gloss and matt-looking surfaces, in the aforementioned case the high-gloss coating on the outside and the matt coating on the inside.
  • Such effective differences are very desirable for many ornamental devices, decorative or informative or advertising parts as well as handicraft objects and information signs of all kinds.
  • a particular advantage of the claimed method of working is that the individual articles can be finished very economically in one process.
  • chemical and electrolytic gloss processes can be used, which can be carried out in one and the same bath due to the different material layers, e.g. lead on the one hand glossy or on the other hand completely matt or only differently shiny surfaces.
  • the individual plating layers can e.g. consist of aluminum of different purity, for example an aluminum material with between 99.8 and 99.99% Al on the outside (remainder impurities in the form of Fe, Si, Mn and other metals) and an inside with between 99.0 and 99, 5% Al (rest impurities in the form of Fe, Si, Mn and other metals).
  • the removal can take place mechanically or chemically. Burning out with the help of laser beams represents a special form of recess. This makes it possible to preprogrammed characters or figures of all kinds from the outside, e.g. later burn out the high-gloss plating layer.

Description

Die Erfindung betrifft ein Verfahren nach dem Oberbegriff des Anspruchs 1 und geht davon aus, daß man Bleche vornehmlich im Walzverfahren miteinander plattieren kann. Es entsteht so ein sich aus zwei oder noch mehr Schichten zusammensetzender neuer Werkstoff.The invention relates to a method according to the preamble of claim 1 and assumes that sheets can be clad together primarily in the rolling process. This creates a new material made up of two or more layers.

Ein Verfahren der eingangs bezeichneten Art ist in der japanischen Patentanmeldung Nr. 56-10999 (10999/81) beschrieben. Diesem bekannten Verfahren liegt das Problem zugrunde, die Oberfläche eines plattierten Gegenstandes mit einer Materialschicht aus Aluminium und einer Materialschicht aus nicht rostendem Stahl mit einer farbigen Musterung zu versehen. Hierzu wird die zu musternde Oberfläche der Materialschicht aus nicht rostendem Stahl mit einem gegen Korrosion widerstandsfähigen Film belegt, der die Musterung in Form von Löchern im Film aufweist. Anschließend wird die mit dem Film belegte Oberfläche geätzt und elektrolytisch poliert, wobei beim Ätzen die äußere Materialschicht abgetragen wird, so daß die innere Materialschicht frei liegt. Dann wird die frei liegende innere Materialschicht mit einer gefärbten Schicht überzogen, wodurch die angestrebte Musterung geschaffen wird.A method of the type described in the opening paragraph is described in Japanese Patent Application No. 56-10999 (10999/81). This known method is based on the problem of providing the surface of a clad object with a material layer made of aluminum and a material layer made of stainless steel with a colored pattern. For this purpose, the surface of the material layer made of stainless steel to be patterned is coated with a corrosion-resistant film which has the pattern in the form of holes in the film. The surface covered with the film is then etched and polished electrolytically, the outer layer of material being removed during the etching so that the inner layer of material is exposed. Then the exposed inner layer of material is covered with a colored layer, creating the desired pattern.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs bezeichneten Art so weiterzubilden, daß auch ohne zusätzlichen Überzug eine dekorative oder informative Musterung geschaffen werden kann.The invention has for its object to develop a method of the type mentioned in such a way that a decorative or informative pattern can be created without additional coating.

Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This object is achieved by the characterizing features of claim 1.

Erfindungsgemäß wurde gefunden, daß Plattierungsschichten aus Aluminium unterschiedlicher Zusammensetzung wie unterschiedlicher Reinheit durch Oberflächenbehandlung in einem einzigen Behandlungsbad aufgrund unterschiedlichen Reaktionsvermögens der Schichten dekorative oder informative Musterungen vielfältiger Art herstellen kann. Dabei hat es sich gezeigt, daß bei Verwendung von Aluminium-Legierungen als Material für die Plattierungsschichten schon geringe unterschiedliche Zusammensetzungen dekorative oder informative Musterungen ergeben, obwohl nur ein Behandlungsbad benutzt wird. Dies beruht auf dem unterschiedlichen Reaktionsvermögen der einzelnen Materialschichten auf das Behandlungsbad. Die Freilegung bzw. Abtragung der äußeren Plattierungsschicht kann auf chemischem oder mechanischem Wege erfolgen. Wesentlich für die Erzielung des angestrebten Effekts ist die Anwendung ein und desselben Behandlungsbades, auf das die einzelnen Plattierungsschichten unterschiedlich reagieren. Mit anderen Worten wird erfindungsgemäß von dem festgestellten unterschiedlichen Ansprechen der verschieden zusammengesetzten Plattierungsschichten auf ein und dasselbe Behandlungsbad zur Erzielung kontrastreich voneinander abweichender Effekte in den erhabenen sowie tieferliegenden Schichten Gebrauch gemacht.According to the invention, it has been found that cladding layers made of aluminum of different composition and different purity can produce decorative or informative patterns of various types by surface treatment in a single treatment bath due to the different reactivity of the layers. It has been found that when aluminum alloys are used as the material for the plating layers, even slightly different compositions result in decorative or informative patterns, even though only one treatment bath is used. This is due to the different reactivity of the individual material layers to the treatment bath. The outer plating layer can be exposed or removed by chemical or mechanical means. The use of one and the same treatment bath, to which the individual plating layers react differently, is essential for achieving the desired effect. In other words, according to the invention, use is made of the different response of the differently composed cladding layers to one and the same treatment bath to achieve contrasting effects in the raised and lower layers.

Die Ausnutzung der beanspruchten Lehre soll an dem nachstehenden Beispiel erläutert werden.The use of the claimed teaching will be explained using the example below.

Aus aus zwei verschiedenen Aluminium-Legierungen hergestellten plattierten Blechen werden im Wege der Kaltumformung Verschlüsse, Zierkappen oder ähnliche Teile für z.B. kosmetische Produkte gebildet. Dabei kann z.B. außen eine Hochglanz gebende Schicht und innen eine weniger Glanz gebende Schicht vorgesehen werden. Im Zuge der Weiterbearbeitung der Rohteile werden entsprechend den Musterungen Teile der äußeren Schicht durch an sich bekannte Verfahren abgetragen, so daß Artikel entstehen, deren äußere Fläche durch die tiefer liegende Fläche mit unterschiedlicher Materialzusammensetzung unterbrochen ist. Wird ein solcher Artikel nunmehr in ein Oberflächenbehandlungsbad eingebracht und dort z.B. chemisch oder elektrolytisch geglänzt, ggfs. noch eloxiert und gefärbt, so stehen allein durch die Behandlung in ein und demselben Bad nebeneinander hochglänzende und matt aussehende Flächen, in dem vorerwähnten Fall außen die Hochglanzschicht und innen die mattierte Schicht. Solche effektvollen Unterschiede sind bei vielen Ziergeräten, dekorativen oder informativen oder werbenden Teilen sowie kunstgewerblichen Gegenständen und Hinweisschildern aller Art sehr erwünscht.Cladding, decorative caps or similar parts are made from two different aluminum alloys made of clad sheets by cold forming, e.g. for cosmetic products formed. Here, e.g. a high-gloss layer is provided on the outside and a less-gloss layer is provided on the inside. In the course of further processing of the raw parts, parts of the outer layer are removed in accordance with the patterns by methods known per se, so that articles are formed whose outer surface is interrupted by the lower-lying surface with a different material composition. If such an article is now placed in a surface treatment bath and there e.g. chemically or electrolytically polished, if necessary still anodized and colored, the result of the treatment in one and the same bathroom are high-gloss and matt-looking surfaces, in the aforementioned case the high-gloss coating on the outside and the matt coating on the inside. Such effective differences are very desirable for many ornamental devices, decorative or informative or advertising parts as well as handicraft objects and information signs of all kinds.

Man kann natürlich auch umgekehrt durch geeignete Wahl der Plattierungsschichten die äubere erhabene Schicht matt gestalten und die innere als Hochglanzschicht ausbilden, wobei es auch hier darauf ankommt, ein und dasselbe Bad zu verwenden, auf welches die Schichten unterschiedlich reagieren.Conversely, it is also possible, conversely, to make the outer raised layer matt and to design the inner layer as a high-gloss layer by suitable choice of the plating layers, it also being important here to use the same bath to which the layers react differently.

Ein besonderer Vorteil der beanspruchten Arbeitsweise ist es, daß die einzelnen Artikel sehr wirtschaftlich in einem Verfahrenszug veredelt werden können. Man kann sich dabei insbesondere chemischer und elektrolytischer Glänzverfahren bedienen, die in ein und demselben Bad aufgrund der unterschiedlichen Materialschichten zu z.B. einerseits glänzende bzw. andererseits gänzlich matten oder aber auch nur unterschiedlich glänzenden Flächen führen.A particular advantage of the claimed method of working is that the individual articles can be finished very economically in one process. In particular, chemical and electrolytic gloss processes can be used, which can be carried out in one and the same bath due to the different material layers, e.g. lead on the one hand glossy or on the other hand completely matt or only differently shiny surfaces.

Die einzelnen Plattierungsschichten können z.B. aus Aluminium unterschiedlicher Reinheit bestehen, beispielsweise außen ein Alu-Material mit zwischen 99,8 und 99,99% AI (Rest Verunreinigungen in Form von Fe, Si, Mn und anderen Metallen) und innen ein solches mit zwischen 99,0 und 99,5% AI (Rest Verunreinigungen in Form von Fe, Si, Mn und anderen Metallen).The individual plating layers can e.g. consist of aluminum of different purity, for example an aluminum material with between 99.8 and 99.99% Al on the outside (remainder impurities in the form of Fe, Si, Mn and other metals) and an inside with between 99.0 and 99, 5% Al (rest impurities in the form of Fe, Si, Mn and other metals).

Die Abtragung kann, wie schon erwähnt, mechanisch oder chemisch erfolgen. Dabei stellt eine besondere Form des Aussparens das Ausbrennen mit Hilfe von Laserstrahlen dar. So wird es ermöglicht, vorher programmierte Zeichen oder Figuren aller Art aus der äußeren, z.B. später hochglänzend gestalteten Plattierungsschicht herauszubrennen.As already mentioned, the removal can take place mechanically or chemically. Burning out with the help of laser beams represents a special form of recess. This makes it possible to preprogrammed characters or figures of all kinds from the outside, e.g. later burn out the high-gloss plating layer.

Die Zusammensetzung des Oberflächenbehandlungsbades kann in weiten Grenzen schwanken, wesentlich ist nur, daß die einzelnen Plattierungsschichten darauf unterschiedlich ansprechen. Beispielhafte Zusammensetzungen eines Glänzbades sind:

  • A. 50 Gew.-Teile Schwefelsäure (68 %ig), 50 Gew.-Teile Phosphorsäure (68 %ig) und 40 g gelöstes AI je kg Badflüssigkeit
  • B. 92 Gew.-Teile Phosphorsäure (85 %ig), 3-5 Gew.-Teile Salpetersäure (53 %ig) und 3-5 Gew.-Teile Kupfersulfat
  • C. 11 Gew.-Teile Flußsäure(73 %ig), 12 Gew.-Teile Salpetersäure (53 %ig), 7 Gew.-Teile Ammoniumbifluorid und 70 Gew.-Teile Wasser
The composition of the surface treatment bath can vary within wide limits, it is only important that the individual plating layers respond differently to it. Exemplary compositions of a gloss bath are:
  • A. 50 parts by weight of sulfuric acid (68%), 50 parts by weight of phosphoric acid (68%) and 40 g of dissolved AI per kg of bath liquid
  • B. 92 parts by weight of phosphoric acid (85%), 3-5 parts by weight of nitric acid (53%) and 3-5 parts by weight of copper sulfate
  • C. 11 parts by weight of hydrofluoric acid (73%), 12 parts by weight of nitric acid (53%), 7 parts by weight of ammonium bifluoride and 70 parts by weight of water

Kommt es z.B. darauf an, unterschiedlichen Glanz zu bewirken, so taucht man die plattierten Formkörper z.B. (außen 99,9%, innen 99,5% Al) in ein Glänzbad entsprechend einer der obigen Zusammensetzungen A bis C ein und behandelt ggfs. noch in der üblichen Weise nach, z.B. durch Eloxieren und Färben.Is it e.g. to effect different glosses, one plunges the plated shaped bodies e.g. (outside 99.9%, inside 99.5% Al) in a gloss bath according to one of the above compositions A to C and, if necessary, treats in the usual manner, e.g. by anodizing and coloring.

Claims (5)

1. A process for producing decorative or informative patterns on objects that are made up of singly or possibly multiply plated metal sheets, wherein the outer plated layer is removed in the shape of the desired pattern down to at least one of the underlying plated layers, and the object is subsequently treated to obtain different surfaces, characterised in that plated layers of aluminium alloys of different composition are used for the object and that after the removal of the outer plated layer the object is treated in one and the same surface treatment bath with which the outer and the inner aluminium alloy layers react differently.
2. A process according to claim 1, characterised in that the surface treatment bath is a polishing bath, etching bath or pickling bath which gives the aluminium alloy layers a different surface effect.
3. A process according to claim 1 or claim 2, characterised in that the outer aluminium alloy layer is removed mechanically.
4. A process according to claim 1 or claim 2, characterised in that the outer aluminium alloy layer is removed chemically.
5. A process according to claim 1 or claim 2, characterised in that the outer aluminium alloy layer is removed with the aid of laser beams.
EP88100337A 1987-01-20 1988-01-12 Process for making decorative or informative patterns on objects made of metal sheets with one or possibly several coatings Expired - Lifetime EP0277495B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873701456 DE3701456A1 (en) 1987-01-20 1987-01-20 METHOD FOR PRODUCING DECORATIVE OR INFORMATIVE PATTERNS ON OBJECTS THAT WERE MADE FROM SIMPLY OR IF NEEDED, MULTIPLE-PLATED SHEETS
DE3701456 1987-01-20

Publications (2)

Publication Number Publication Date
EP0277495A1 EP0277495A1 (en) 1988-08-10
EP0277495B1 true EP0277495B1 (en) 1990-10-24

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EP88100337A Expired - Lifetime EP0277495B1 (en) 1987-01-20 1988-01-12 Process for making decorative or informative patterns on objects made of metal sheets with one or possibly several coatings

Country Status (5)

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US (1) US4786362A (en)
EP (1) EP0277495B1 (en)
JP (1) JPS63192880A (en)
DE (2) DE3701456A1 (en)
ES (1) ES2016236B3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3843435A1 (en) * 1988-12-23 1990-06-28 Messerschmitt Boelkow Blohm Process for producing a decorative relief
US5817243A (en) * 1996-10-30 1998-10-06 Shaffer; Wayne K. Method for applying decorative contrast designs to automotive and motorcycle parts using lasers
FR2806936B1 (en) * 2000-04-03 2002-10-18 Oreal ARTICLE DECORATED BY A LASER BEAM AND METHOD FOR DECORATING SUCH AN ARTICLE
DE10049579B4 (en) * 2000-10-06 2006-09-14 Audi Ag Method for producing a decorative surface
US20060048371A1 (en) * 2004-09-07 2006-03-09 Chung-He Li Method for manufacturing of a stainless steel product having patterns and drawings thereon

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1862231A (en) * 1928-06-22 1932-06-07 Wadsworth Watch Case Co Decorating base metals or alloys of base metals
US2354756A (en) * 1940-09-25 1944-08-01 Keuffel & Esser Co Measuring tape
US2731333A (en) * 1954-05-13 1956-01-17 Komak Inc Method of forming ornamented surfaces
US3197391A (en) * 1964-06-18 1965-07-27 Fredrick H Bowers Method of etching aluminum
US3503815A (en) * 1968-05-27 1970-03-31 Robert M Johnson Method of producing a multi-colored metal design on an arcuate metal base
CH522516A (en) * 1970-03-25 1972-06-30 Metaux Precieux Sa Decorative colouring of metal surfaces - by repeated oxidn
US3839163A (en) * 1971-08-31 1974-10-01 Riken Light Metal Ind Co Process for forming on an aluminum surface a colored design
JPS5028451A (en) * 1973-07-16 1975-03-24
CH583302A5 (en) * 1974-10-22 1976-12-31 Bloesch W Ag
JPS5220940A (en) * 1975-08-12 1977-02-17 Mitsubishi Rayon Co Process for painting alumite products
JPS54148145A (en) * 1978-05-13 1979-11-20 Citizen Watch Co Ltd Hard armour parts for watch and production thereof
JPS6042566B2 (en) * 1978-06-26 1985-09-24 鐘淵化学工業株式会社 Method for continuously manufacturing electrical laminated insulation boards or metal foil clad laminates
US4242378A (en) * 1979-03-29 1980-12-30 Reiko Co., Ltd. Method of making a decorated film with a metal layer in the form of a given pattern
JPS57110668A (en) * 1980-12-29 1982-07-09 Pilot Pen Co Ltd:The Method for etching and patterning of extruded profile of aluminum or its alloy
JPS5923874A (en) * 1982-07-30 1984-02-07 Mitsubishi Alum Co Ltd Method for patterning aluminum alloy
US4543153A (en) * 1984-05-17 1985-09-24 Psi Star Process and apparatus for etching copper masked by a nickel-gold mask

Also Published As

Publication number Publication date
US4786362A (en) 1988-11-22
DE3860834D1 (en) 1990-11-29
EP0277495A1 (en) 1988-08-10
ES2016236B3 (en) 1991-07-16
JPS63192880A (en) 1988-08-10
DE3701456A1 (en) 1988-07-28
ES2016236A4 (en) 1990-11-01

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