WO1993025726A1 - Process and device for manufacturing profiled, enamel-coated strips or metal sheets - Google Patents

Process and device for manufacturing profiled, enamel-coated strips or metal sheets Download PDF

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Publication number
WO1993025726A1
WO1993025726A1 PCT/DE1993/000515 DE9300515W WO9325726A1 WO 1993025726 A1 WO1993025726 A1 WO 1993025726A1 DE 9300515 W DE9300515 W DE 9300515W WO 9325726 A1 WO9325726 A1 WO 9325726A1
Authority
WO
WIPO (PCT)
Prior art keywords
enamel
sheets
strips
profiled
coated
Prior art date
Application number
PCT/DE1993/000515
Other languages
German (de)
French (fr)
Inventor
Hans Josef May
Roland Schnettler
Original Assignee
Hans Josef May
Roland Schnettler
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 Hans Josef May, Roland Schnettler filed Critical Hans Josef May
Priority to AU43068/93A priority Critical patent/AU4306893A/en
Publication of WO1993025726A1 publication Critical patent/WO1993025726A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D5/00—Coating with enamels or vitreous layers
    • C23D5/04—Coating with enamels or vitreous layers by dry methods

Definitions

  • Steel strips or sheets are enamelled, in particular for corrosion protection, for a wide variety of uses. They are characterized by high resistance to corrosion protection and high surface hardness. Strips and sheets are enamel-coated, from which flat plates are cut, which are used without further deformation, for example as wall panels or facade cladding. Furthermore, sheets are used which are first profiled by rolling, folding or deep drawing and then enamel coated in separate processing steps. They are used in particular as components, for example in the manner of trapezoidal profiles, steel strips and sheets, which are plastic-coated. However, this coating is particularly in the Fire is problematic because aggressive and toxic compounds are released. It is therefore a requirement to replace plastic-coated strips or sheets with corrosion-protected sheets without plastic coating with the same or better properties than the plastic or dry paint coating with regard to weathering and aging resistance with the colors remaining.
  • the object of the invention is to propose a method for producing profiled, enamel-coated strips or sheets which is economical in industrial terms and which permits almost any type of profiling.
  • the object of the invention is achieved in that the profiling of the heated and then enamel-coated strips or sheets takes place in the plastic-viscous state of the enamel coating.
  • enamels generally have no melting point in the thermodynamic sense, but instead continuously change from the solid to the plastic-viscous to the molten state when heated or vice versa when cooling. In the area of their freezing or transformation temperature T, the enamel changes from the elastic, brittle to the plastic-viscous state.
  • the correspondingly warm and coated strips or sheets are to be profiled in a clearly plastically viscous state.
  • the suitable known temperature range varies depending on the type of enamel. For reasons of the energy input in such an overall process, it is advantageous to coat the strips or sheets immediately after their heating treatment and then to profile them.
  • a powder coating is preferably suitable for the proposed methods. However, wet coating is also possible if cooling is provided after the strips or sheets have been produced from the base metal.
  • the strips or sheets can be profiled continuously or discontinuously using the known methods, such as folding, deep drawing and / or rolling, without the enamel layer being damaged.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

A process and device are disclosed for manufacturing profiled, enamel-coated strips or metal sheet, preferably made of steel. The heated and enamel-coated strips or metal sheets are profiled when the enamel coating is in the plastic-viscous state.

Description

"Verfahren zur Herstellung von profilierten, emailbeschichteten Bändern oder Blechen sowie Einrichtung zur Durchführung solcher Verfahren" "Process for the production of profiled, enamel-coated strips or sheets and device for carrying out such processes"
Insbesondere zum Korrosionsschutz werden für die ver¬ schiedensten Verwendungszwecke Stahlbänder oder -bleche emailliert. Sie zeichnen sich durch hohe Korrosions¬ schutzbeständigkeit und hohe Oberflächenhärte aus. Es wer¬ den Bänder und Bleche emailbeschichtet, aus denen plane Platten geschnitten werden, die ohne weitere Verformung, z.B. als Wandtafeln oder Fassadenverkleidungen verwendet werden. Weiterhin sind Bleche in Verwendung, die zunächst durch Walzen, Abkanten oder Tiefziehen profiliert und an¬ schließend in getrennten Bearbeitungsstufen emailbe¬ schichtet werden. Zum Einsatz gelangen sie insbesondere als Bauteile, beispielsweise in der Art von Trapezprofi¬ len, Stahlbändern und -bleche, die kunststoffbeschichtet sind. Diese Beschichtung allerdings ist insbesondere im Brandfall problematisch, da aggressive und giftige Verbindungen frei werden. Es ist daher eine Forderung, kunststoffbeschichtete Bänder oder Bleche zu ersetzen durch korrosionsgeschützte Bleche ohne Kunststoffbe- Schichtung bei gleichen oder besseren Eigenschaften als die Kunststoff- oder Trockenlackbeschichtung im Hinblick auf Witterungs- und Alterungsbeständigkeit bei bleiben¬ den Farbgebungen.Steel strips or sheets are enamelled, in particular for corrosion protection, for a wide variety of uses. They are characterized by high resistance to corrosion protection and high surface hardness. Strips and sheets are enamel-coated, from which flat plates are cut, which are used without further deformation, for example as wall panels or facade cladding. Furthermore, sheets are used which are first profiled by rolling, folding or deep drawing and then enamel coated in separate processing steps. They are used in particular as components, for example in the manner of trapezoidal profiles, steel strips and sheets, which are plastic-coated. However, this coating is particularly in the Fire is problematic because aggressive and toxic compounds are released. It is therefore a requirement to replace plastic-coated strips or sheets with corrosion-protected sheets without plastic coating with the same or better properties than the plastic or dry paint coating with regard to weathering and aging resistance with the colors remaining.
Eine nachträgliche Profilierung emailbeschichteter glatter Bänder oder Bleche ist nach bisherigen Erkennt¬ nissen wegen der Sprödigkeit der Emailschicht nicht mögl ich.A subsequent profiling of enamel-coated smooth strips or sheets is not possible according to previous knowledge because of the brittleness of the enamel layer.
Die Aufgabe der Erfindung besteht darin, ein Verfahren zur Herstellung von profilierten, emailbeschichteten Bändern oder Blechen vorzuschlagen, welches im industri¬ ellen Umfange wirtschaftlich ist und nahezu jede Art der Profilierung zuläßt.The object of the invention is to propose a method for producing profiled, enamel-coated strips or sheets which is economical in industrial terms and which permits almost any type of profiling.
Gelöst wird die erfindungsgemäße Aufgabe dadurch, daß die Profilierung der erwärmten und anschließend emailbe¬ schichteten Bänder oder Bleche im plastisch-viskosen Zu¬ stand der Emai lbeschi chtung erfolgt. Emails haben wie Gläser im allgemeinen keinen Schmelzpunkt im thermodyna- mischen Sinn, sondern gehen beim Erwärmen kontinuierlich aus dem festen über den plastisch-viskosen in den ge¬ schmolzenen Zustand über bzw. umgekehrt beim Abkühlen. Im Bereich ihrer Einfrier- oder Transformationstempera¬ tur T geht das Email aus dem elastisch-spröden in den plastisch-viskosen Zustand über. Im eindeutig plastisch¬ viskosen Zustand soll erfindungsgemäß die Profilierung der entsprechend warmen und beschichteten Bänder oder Bleche erfolgen. Der geeignete bekannte Temperaturbereich ist je nach Art des Emails unterschiedlich. Aus Gründen der Einsatzenergie in einem solchen Gesamt¬ verfahren ist es vorteilhaft, die Bänder oder Bleche im sofortigen Anschluß an ihre Erwärmungsbehandlung zu be¬ schichten und anschließend zu profilieren. Bevorzugt eignet sich für die vorgeschlagenen Verfahren eine Pulverbeschichtung. Es ist jedoch auch eine Naßbeschich- tung möglich, wenn nach der Herstellung der Bänder oder Bleche aus dem Grundmetall eine Abkühlung vorgesehen ist.The object of the invention is achieved in that the profiling of the heated and then enamel-coated strips or sheets takes place in the plastic-viscous state of the enamel coating. Like glasses, enamels generally have no melting point in the thermodynamic sense, but instead continuously change from the solid to the plastic-viscous to the molten state when heated or vice versa when cooling. In the area of their freezing or transformation temperature T, the enamel changes from the elastic, brittle to the plastic-viscous state. According to the invention, the correspondingly warm and coated strips or sheets are to be profiled in a clearly plastically viscous state. The suitable known temperature range varies depending on the type of enamel. For reasons of the energy input in such an overall process, it is advantageous to coat the strips or sheets immediately after their heating treatment and then to profile them. A powder coating is preferably suitable for the proposed methods. However, wet coating is also possible if cooling is provided after the strips or sheets have been produced from the base metal.
Im plastisch-viskosen Zustand der Emailschicht lassen sich die Bänder oder Bleche mit den bekannten Verfahren, wie Abkanten, Tiefziehen und/oder Walzen kontinuierlich oder diskontinuierlich profilieren, ohne daß die Email¬ schicht beschädigt wird.In the plastically viscous state of the enamel layer, the strips or sheets can be profiled continuously or discontinuously using the known methods, such as folding, deep drawing and / or rolling, without the enamel layer being damaged.
Von Vorteil sind Einrichtungen zur Durchführung des Ver¬ fahrens mit beheizten Profi 1 ierungswerkzeugen .Devices for carrying out the method with heated professional tools are advantageous.
Erfindungsgemäß wird auch vorgeschlagen, die für die Be¬ schichtung und die anschließende Profilierung notwendigen Vorrichtungen in einzelnen Abschnitten einer temperatur¬ überwachten und -gesteuerten Erwärmungsanlage anzuordnen. According to the invention, it is also proposed to arrange the devices necessary for the coating and the subsequent profiling in individual sections of a temperature-monitored and -controlled heating system.

Claims

Patentansprüche Claims
1. Verfahren zur Herstellung von profilierten, emailbe¬ schichteten Bändern oder Blechen, d a d u r c h g e k e n n - z e i c h n e t , daß die Profilierung der erwärmten und emailbeschichteten Bänder oder Bleche im plastisch-visko¬ sen Zustand der E ai lbeschichtung erfolgt.1. Process for the production of profiled, enamel-coated strips or sheets, so that the heated and enamel-coated strips or sheets are profiled in the plastic-viscous state of the enamel coating.
2. Verfahren nach Anspruch 1, d a d u r c h g e k e n n z e i c h - n e t , daß die Bänder oder Bleche im sofortigen Anschluß an ihre Erwärmungsbehandlung beschichtet und profiliert werden .2. The method of claim 1, d a d u r c h g e k e n n e e i c h - n e t that the strips or sheets are coated and profiled immediately after their heating treatment.
3. Verfahren nach einem oder mehreren der vorangegangenen Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß die3. The method according to one or more of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that the
- Bänder oder Bleche mit Pulvern emailbeschichtet werden.- Coils or sheets can be coated with enamel powder.
4. Verfahren nach Anspruch 1, d a d u r c h g e k e n n z e i c h ¬ n et , daß die Bänder oder Bleche durch Abkanten, Tief- ziehen und/oder Walzbearbeitung in kontinuierlichen oder diskontinuierlichen Verfahren profiliert werden.4. The method of claim 1, d a d u r c h g e k e n n z e i c h ¬ n et that the strips or sheets are profiled by folding, deep drawing and / or rolling processing in continuous or discontinuous processes.
5. Einrichtung zur Durchführung der Verfahren nach einem oder mehreren der vorangegangenen Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß einer Vorrichtung zur Email- beschichtung eine Vorrichtung mit beheizten Profilie- rungswerkzeugen nachgeschaltet ist.5. Device for performing the method according to one or more of the preceding claims, that a device for enamel coating is followed by a device with heated profiling tools.
6. Einrichtung nach Anspruch 5, d a d u r c h g e k e n n - z e i c h n e t , daß die Vorrichtungen in aufeinanderfol¬ genden Strecken einer in einzelnen Abschnitten tempera¬ turüberwachten und -gesteuerten Erwärmungsanlage angeord¬ net sind. 6. Device according to claim 5, so that the devices are arranged so that the devices are arranged in successive sections of a heating system monitored and controlled in individual sections.
PCT/DE1993/000515 1992-06-12 1993-06-11 Process and device for manufacturing profiled, enamel-coated strips or metal sheets WO1993025726A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU43068/93A AU4306893A (en) 1992-06-12 1993-06-11 Process and device for manufacturing profiled, enamel-coated strips or metal sheets

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4219195.5 1992-06-12
DE19924219195 DE4219195A1 (en) 1992-06-12 1992-06-12 Process for the production of profiled, enamel-coated strips or sheets and device for carrying out such processes

Publications (1)

Publication Number Publication Date
WO1993025726A1 true WO1993025726A1 (en) 1993-12-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1993/000515 WO1993025726A1 (en) 1992-06-12 1993-06-11 Process and device for manufacturing profiled, enamel-coated strips or metal sheets

Country Status (3)

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AU (1) AU4306893A (en)
DE (1) DE4219195A1 (en)
WO (1) WO1993025726A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR827094A (en) * 1936-09-26 1938-04-15 Philips Nv Process for obtaining a vitreous layer on a support and objects obtained by this process
FR954166A (en) * 1947-10-10 1949-12-20 Process and apparatus for the manufacture of enamelled metal tiles or the like

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR827094A (en) * 1936-09-26 1938-04-15 Philips Nv Process for obtaining a vitreous layer on a support and objects obtained by this process
FR954166A (en) * 1947-10-10 1949-12-20 Process and apparatus for the manufacture of enamelled metal tiles or the like

Also Published As

Publication number Publication date
AU4306893A (en) 1994-01-04
DE4219195A1 (en) 1993-12-16

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