EP2125382A1 - Verfahren zum beschriften oder markieren von oberflächen - Google Patents
Verfahren zum beschriften oder markieren von oberflächenInfo
- Publication number
- EP2125382A1 EP2125382A1 EP08716753A EP08716753A EP2125382A1 EP 2125382 A1 EP2125382 A1 EP 2125382A1 EP 08716753 A EP08716753 A EP 08716753A EP 08716753 A EP08716753 A EP 08716753A EP 2125382 A1 EP2125382 A1 EP 2125382A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- absorption promoter
- metal
- temperature
- laser
- absorption
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/262—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used recording or marking of inorganic surfaces or materials, e.g. glass, metal, or ceramics
Definitions
- the invention relates to a method for marking or marking surfaces, in particular surfaces of metals.
- a label by means of material application, as with paint, or even with a material removal, as in an engraving done.
- a so-called occasion lettering or a startup label can be made.
- the metal on its surface by a targeted change in temperature changes its color in areas.
- the surface gets a colored appearance through oxidation processes on the surface and thus a colored coloring, marking or inscription.
- the thickness of the oxidation layer can be influenced since the diffusion of the oxygen atoms is dependent on the tempering temperature and / or the annealing time.
- lasers are used to generate an annotation inscription.
- a surface layer is roughened and / or changed in its microstructure, so that, for example, weakening of the material can also occur.
- the object of the invention is to provide a method for labeling or marking of surfaces of metals, in which the disadvantages of the prior art are reduced or avoided and the smoothest possible inscribed or marked surface is achieved.
- the object is achieved with a method for labeling or marking of surfaces, in particular metal surfaces, wherein the surface to be labeled or to be marked is coated in a first step with an absorption promoter and then An energy-rich beam, such as a laser beam, is applied to surface elements to be labeled or marked, which increases the surface via a discoloring temperature.
- An energy-rich beam such as a laser beam
- Preference is given to cleaning the surface before applying the absorption promoter.
- the surface is cleaned of residues and / or absorption promoter which is no longer needed.
- the absorption promoter can be applied as a lacquer or as a gluable or adhering foil element.
- an intermediate layer is present between the absorption promoter and the surface.
- This intermediate layer advantageously has a thickness d in the range of 25 to 100 ⁇ m. It is particularly advantageous if the absorption promoter is essentially applied only to surface areas to be labeled later or to be marked.
- the absorption promoter can also be applied over a large area.
- FIG. 1 shows a schematic representation of a surface to be labeled or to be marked
- Fig. 2 is a diagram
- Fig. 3 is a block diagram for illustrating the method according to the invention.
- FIG. 1 schematically shows a metal surface which is to be labeled or marked.
- a layer 2 is applied to the metal surface, wherein the layer consists of a so-called absorption promoter.
- the layer has a distance d from the metal surface.
- high-energy radiation such as laser radiation 4, for example as a laser pulse
- the radiation or the laser light is not brought directly into contact or in interaction with the metal surface, but by the impact of the laser light on the layer of the absorption promoter 2, the laser light converted into heat, which affects the metal surface 1.
- the absorption promoter is locally by absorption of the laser light in a plasma 3, also called plasma cloud, transferred, wherein the plasma 3 gives off the heat to the adjacent metal and there locally causes heating up to the tempering temperature.
- the distance d between the absorption promoter and the metal surface serves to better propagate the plasma or the plasma cloud.
- this distance is generated by a film or the like.
- the distance is advantageous in the range of 25 - 100 microns.
- the advantageous distance may vary with the beam source used and, for example, with its performance.
- the distance is advantageously achieved by an intermediate layer 7.
- the intermediate layer is applied together with the absorption promoter, wherein the intermediate layer can also be produced by spacers.
- the laser pulse 4 with its high energy density per unit area on the metal surface does not generate too high temperatures and thus does not cause any local damage.
- the resulting high temperature T LaS e r thus does not arise on the surface of the metal to be labeled or marked but on the surface of the absorption promoter 2.
- the high temperature of the light-absorbing material of the absorption promoter is converted into a plasma. This is preferably done relatively locally, so that a targeted labeling can be performed.
- the plasma is brought to a temperature T P asma or generated at this temperature.
- the plasma temperature T P ⁇ aSm a below the temperature T ⁇ _ase r which would occur on impact of the laser radiation on the metal surface.
- an oxidation process 6 takes place on the surface of the metal 5, which takes place in a very controlled manner, because the temperature of the plasma can be selected via the plasma-forming material of the absorption promoter. Due to the targeted oxidation on the surface of the metal, the color of the surface is thus selectively carried out.
- FIG. 2 shows a diagram 50 in which a time duration is plotted on the x-axis.
- Curve 51 represents a pulse of a laser, a laser pulse.
- an absorption 52 of the laser pulse in the material an evaporation 53 of the surface material and an ionization 54 of the material take place.
- These three processes advantageously take place within the duration of the laser pulse of, for example, about 10 ns.
- the laser beam strikes directly on the metal surface and the majority of the incident radiation is absorbed by the metal surface. This leads to a strong heating of the surface, which causes effects such as evaporation, melting and heating of the material.
- a high peak power which usually causes a heating far above the tempering temperature. Due to different modes (energy ranges) in the focus of, for example, a Nd: YAG laser, therefore, not only a resulting temperature can be generated over the area of the irradiation. There is therefore a strong unavoidable heating of the metal surface.
- LTF laser transfer method
- PLD pulse laser deposition
- Target substrate controls the tempering temperature.
- the absorption promoter enables rapid evaporation and the "gas" formed continues to absorb energy within the laser pulse, thus converting the gaseous state of the ions and atoms into a plasma Considering a laser pulse of 10 ns duration, see Figure 2, the absorption processes take place , Evaporation and ionization within this
- Pulse length or pulse duration Pulse length or pulse duration. Thereafter, the plasma cloud spreads spatially, which in the
- the pulse length it is rather slow.
- the ions then recombine with electrons and re-form neutral particles, resulting in the formation of larger clusters, such as clusters, nanoparticles or the like.
- thermally controlled heating of the target substrate occurs locally.
- Any residues in the condensation of the plasma are advantageously not fixed on the metal and therefore can advantageously and substantially easily removed again become.
- a thermal process control with an absorption promoter to the desired tempering temperature of the metal substrate is controlled and without damaging the metal surface.
- FIG. 3 shows a block diagram 100 for explaining a method according to the invention for inscribing or marking a surface, such as preferably a metal surface.
- An optionally previously cleaned surface of a metal is coated in block 101 with an absorption promoter.
- a distance d between the absorption promoter and the surface can be achieved by a previously or simultaneously applied intermediate layer.
- the coating is preferably carried out substantially only in areas in which a later inscription or marking is to be made.
- the coating can also be made over a large area.
- the coating can be applied as a paint job or as a sticky or adhesive film.
- the coated surface is selectively heated by means of a laser pulse, so that at the locations where the laser pulse is applied, the metal surface is heated above the tempering temperature.
- the surface may optionally be cleaned again, see block 103. This may involve the removal of residues and / or any remaining absorption promoters.
- a high-energy beam such as a laser beam
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Laser Beam Processing (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007008668A DE102007008668A1 (de) | 2007-02-20 | 2007-02-20 | Verfahren zum Beschriften oder Markieren von Oberflächen |
| PCT/EP2008/051292 WO2008101790A1 (de) | 2007-02-20 | 2008-02-01 | Verfahren zum beschriften oder markieren von oberflächen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2125382A1 true EP2125382A1 (de) | 2009-12-02 |
| EP2125382B1 EP2125382B1 (de) | 2013-07-10 |
Family
ID=39563363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08716753.2A Active EP2125382B1 (de) | 2007-02-20 | 2008-02-01 | Verfahren zum beschriften oder markieren von oberflächen |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8609202B2 (de) |
| EP (1) | EP2125382B1 (de) |
| JP (1) | JP2010519050A (de) |
| DE (1) | DE102007008668A1 (de) |
| WO (1) | WO2008101790A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090181313A1 (en) * | 2008-01-14 | 2009-07-16 | Tesa Ag | Pigment layer and method especially for a durable inscription of glass using a high energy radiation |
| US12577683B2 (en) | 2023-02-23 | 2026-03-17 | Kohler Co. | Coloration via laser oxidation |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5448563A (en) * | 1977-09-26 | 1979-04-17 | Mitsubishi Electric Corp | Pattern display method using laser light |
| US4987006A (en) * | 1990-03-26 | 1991-01-22 | Amp Incorporated | Laser transfer deposition |
| US5292559A (en) * | 1992-01-10 | 1994-03-08 | Amp Incorporated | Laser transfer process |
| DE19607621C2 (de) * | 1996-02-29 | 1998-09-03 | Foerster Bernhard Gmbh | Orthodontisches Hilfsteil aus Metall mit einer Markierung und Verfahren zum Aufbringen der Markierung |
| WO1999025562A1 (en) * | 1997-11-14 | 1999-05-27 | Cerdec Corporation | Laser marking method and material |
| US6159832A (en) * | 1998-03-18 | 2000-12-12 | Mayer; Frederick J. | Precision laser metallization |
| DE10058304A1 (de) * | 2000-11-24 | 2002-05-29 | Basf Ag | Verfahren zur Herstellung von alkoxylierten Carbonylverbindungen durch ein anodisches Oxidationsverfahren unter Nutzung der kathodischen Koppelreaktion zur organischen Synthese |
| DE10125794B4 (de) * | 2001-05-26 | 2005-03-24 | Sator Laser Gmbh | Verfahren zum Markieren oder Beschriften von Metallteilen |
| FR2833518B1 (fr) | 2001-12-14 | 2004-06-25 | Gemplus Card Int | Support d'information marquee par laser |
| EP1364798A1 (de) * | 2002-05-22 | 2003-11-26 | Agfa-Gevaert | Vorrichtung zum Lasermarkieren |
| US20050255406A1 (en) * | 2004-05-11 | 2005-11-17 | Shlomo Assa | Marking on a thin film |
| US7060933B2 (en) * | 2004-06-08 | 2006-06-13 | Igor Troitski | Method and laser system for production of laser-induced images inside and on the surface of transparent material |
| US20090181313A1 (en) * | 2008-01-14 | 2009-07-16 | Tesa Ag | Pigment layer and method especially for a durable inscription of glass using a high energy radiation |
-
2007
- 2007-02-20 DE DE102007008668A patent/DE102007008668A1/de not_active Withdrawn
-
2008
- 2008-02-01 US US12/526,083 patent/US8609202B2/en not_active Expired - Fee Related
- 2008-02-01 WO PCT/EP2008/051292 patent/WO2008101790A1/de not_active Ceased
- 2008-02-01 EP EP08716753.2A patent/EP2125382B1/de active Active
- 2008-02-01 JP JP2009550259A patent/JP2010519050A/ja not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008101790A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008101790A1 (de) | 2008-08-28 |
| JP2010519050A (ja) | 2010-06-03 |
| EP2125382B1 (de) | 2013-07-10 |
| US8609202B2 (en) | 2013-12-17 |
| US20100104737A1 (en) | 2010-04-29 |
| DE102007008668A1 (de) | 2008-08-21 |
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