EP1832435A2 - Verfahren zur Oberflächenmarkierung durch Laser - Google Patents

Verfahren zur Oberflächenmarkierung durch Laser Download PDF

Info

Publication number: EP1832435A2
Authority: EP; European Patent Office
Prior art keywords: marking; points; laser; produced; individual
Prior art date: 2006-03-07
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

Application number

EP07380059A

Other languages

English (en)

French (fr)

Other versions

EP1832435B1 (de

EP1832435A3 (de

Inventor

Sven Vogler

Valentí Boira Plans

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.)

Macsa ID SA

Original Assignee

Macsa ID SA

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.)

2006-03-07

Filing date

2007-03-05

Publication date

2007-09-12

2007-03-05 Application filed by Macsa ID SA filed Critical Macsa ID SA

2007-09-12 Publication of EP1832435A2 publication Critical patent/EP1832435A2/de

2010-06-23 Publication of EP1832435A3 publication Critical patent/EP1832435A3/de

2012-04-11 Application granted granted Critical

2012-04-11 Publication of EP1832435B1 publication Critical patent/EP1832435B1/de

Status Not-in-force legal-status Critical Current

2027-03-05 Anticipated expiration legal-status Critical

Links

238000000034 method Methods 0.000 title claims abstract description 26
238000005286 illumination Methods 0.000 claims abstract description 3
238000002679 ablation Methods 0.000 description 4
239000000463 material Substances 0.000 description 3
239000003973 paint Substances 0.000 description 3
238000010330 laser marking Methods 0.000 description 2
239000002184 metal Substances 0.000 description 2
229910052751 metal Inorganic materials 0.000 description 2
239000000126 substance Substances 0.000 description 2
239000002344 surface layer Substances 0.000 description 2
230000000007 visual effect Effects 0.000 description 2
230000001174 ascending effect Effects 0.000 description 1
239000011521 glass Substances 0.000 description 1
239000010410 layer Substances 0.000 description 1
238000004519 manufacturing process Methods 0.000 description 1
150000002739 metals Chemical class 0.000 description 1
230000003287 optical effect Effects 0.000 description 1
238000000926 separation method Methods 0.000 description 1
239000012780 transparent material Substances 0.000 description 1

Images

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
- B41M5/24—Ablative recording, e.g. by burning marks; Spark recording
- 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

Definitions

the present invention relates to a process for marking surfaces by the application of laser beams.
the laser beam marking equipment has means for storing information relating to different types of marking characters, means for selecting the different types of marking, means for controlling the movements of the laser beam projector unit apart from the laser beam projector itself, which may be of the type provided with galvanometers.
the process performed by the equipment consists of interpreting instructions on the types of writing and lettering to use so that the equipment control device generates instructions for moving the laser beam projector and switching on and off said laser beam projector to perform the marking to be produced.
the different processes will be used optionally by the technician depending on the characteristics of the surface on which marking is required.
surfaces that allow a chemical change of colour do not necessarily require an ablation process and surfaces with a surface layer of paint require a special process for the local removal of said layer of paint to form the characters or signs.
the surfaces of materials such as glass or metal will preferably be marked by ablation, a process in which material is specifically removed in the part of the surface to be marked according to the characteristics of the laser beam projected.
the visual impression is one of very little contrast. This occurs mainly on transparent materials marked by laser, but also on metals, etc. This optical effect is produced by light reflection, reflected only in the direction of the vector, and as a result the visual marking is poor.
the inventors have developed a new process to which the present invention relates, based fundamentally on marking characters avoiding the continuous tracing currently known which produces little distinction by light reflection on lines produced individually by the laser device, by substituting said marking for marking by individual points which successively form each of the sections of the characters or signs to be marked. Accordingly the different points corresponding to each character are defined in such a way that the number of points, their separation and the characteristics of the points for each character to be marked are predetermined.
the process according to the present invention is based on substituting the individual determinant outlines of a written character, for example, the arms -1- and -2- of a letter, in the case illustrated the letter "L", for respective series of individual points such as the points -1'-, -1"-, -1-"', etc. for the arm -1- and the points -2'-, -2"-, -2"'-, etc. for the arm -2- of said character.
the number of points will be defined beforehand so that the characters or character source of the system will comprise the definition of the individual characters by series of points that are predetermined in number, arrangement and characteristics, for example, the marking trajectories, to obtain characters with a great capacity to reflect the ambient light in different directions which, as has been proven experimentally, very significantly increases the visibility of the marking.
FIG. 2 An illustration of the process described can be seen in Fig. 2, showing the power applied in ordinates and the process time in abscissae.
a waiting period -4- to improve the precision of point positioning and avoid imprecision due to inertia and times of increased power, moving next to the specific marking period -5- in which the maximum power indicated by the abscissa -6- is reached after an ascending curve -7-, which then descends following the curve -8- to no power, in other words, the switched-off position.
the process continues for another period -9- of movement and a waiting period -10- to another marking period -11- and so on.
the values of the different parameters for different signs will have been predetermined and stored in the control equipment of the laser equipment so that they can be selected at the required time, to produce the specific marking required.
the process according to the present invention can also be applied to marking applications such as two-dimensional code, using the same process, allowing very high precision marking to be performed owing to the application of the waiting time between each two marking points.
a two-dimensional figure -12- has been shown arranged on a rectangular frame with sides -13- and -14-, each individual outline having also been defined in said Fig. by means of series of predetermined points similar to what has been indicated above.
the operation would basically be the same as has been indicated for the marking of each of the points, after its corresponding period of movement and waiting.

Landscapes

Physics & Mathematics (AREA)
Optics & Photonics (AREA)
Laser Beam Processing (AREA)
Treatment Of Fiber Materials (AREA)

EP07380059A 2006-03-07 2007-03-05 Verfahren zur Oberflächenmarkierung durch Laser Not-in-force EP1832435B1 (de)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
ES200600554A ES2325608B1 (es)	2006-03-07	2006-03-07	Procedimiento para el marcado de superficies mediante laser.

Publications (3)

Publication Number	Publication Date
EP1832435A2 true EP1832435A2 (de)	2007-09-12
EP1832435A3 EP1832435A3 (de)	2010-06-23
EP1832435B1 EP1832435B1 (de)	2012-04-11

Family

ID=38091771

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP07380059A Not-in-force EP1832435B1 (de)	2006-03-07	2007-03-05	Verfahren zur Oberflächenmarkierung durch Laser

Country Status (3)

Country	Link
EP (1)	EP1832435B1 (de)
AT (1)	ATE552983T1 (de)
ES (2)	ES2325608B1 (de)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH02211989A (ja) *	1989-02-10	1990-08-23	Nec Corp	レーザマーキング終了時のドット間隔制御方法
JPH03208678A (ja) *	1990-01-12	1991-09-11	Komatsu Ltd	走査型液晶マスク印字装置及び走査方法
JPH0732168A (ja) *	1993-07-20	1995-02-03	Hitachi Ltd	パルスコントロール印字方式及び装置
JP3406817B2 (ja) *	1997-11-28	2003-05-19	株式会社東芝	金属層へのマーク付け方法および半導体装置
US6819349B2 (en) *	2000-11-14	2004-11-16	Toto Ltd.	Mark forming method and product using the same method
US6753501B1 (en) *	2001-11-03	2004-06-22	Darryl Costin, Sr.	Processing of textile materials using laser beams and material sized in larger widths
US6958762B2 (en) *	2003-12-09	2005-10-25	Markem Corporation	Filling an area of an image marked on a material with a laser

2006
- 2006-03-07 ES ES200600554A patent/ES2325608B1/es not_active Expired - Fee Related
2007
- 2007-03-05 AT AT07380059T patent/ATE552983T1/de active
- 2007-03-05 ES ES07380059T patent/ES2385675T3/es active Active
- 2007-03-05 EP EP07380059A patent/EP1832435B1/de not_active Not-in-force

Also Published As

Publication number	Publication date
ES2325608A1 (es)	2009-09-09
ATE552983T1 (de)	2012-04-15
EP1832435B1 (de)	2012-04-11
ES2325608B1 (es)	2010-06-10
EP1832435A3 (de)	2010-06-23
ES2385675T3 (es)	2012-07-30

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