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Laser color marking method for covers of books and printed matters

A printed matter and laser technology, which is applied in the field of laser color marking on the cover of books and printed matters, can solve the problem of fixed marking angle, etc., and achieve the effect of accurate marking, high energy input and convenient operation

Inactive Publication Date: 2012-09-19
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the general laser marking method can only print a single color on the surface of the workpiece material, and the marking angle is fixed.

Method used

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  • Laser color marking method for covers of books and printed matters
  • Laser color marking method for covers of books and printed matters
  • Laser color marking method for covers of books and printed matters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The anti-counterfeiting pattern of this embodiment is set as a two-dimensional code pattern, and its laser color marking method is carried out as follows: figure 1 as shown,

[0029] Step 1. According to the anti-counterfeiting pattern, the surface of the color paste film is a two-dimensional code pattern, and the thickness of each layer of the color paste film is set to 20 μm. The color band arrangement is colorless and black (AP3029) from the surface to the inside; the marking depth is 30± 5μm;

[0030] Step 2, using a CNC milling machine to select an angle of 90° between the laser beam and the working surface;

[0031] Step 3. Program the laser operation parameters into the CNC software and laser marking software, set the linear scanning speed to 200mm / s, set the frequency to 2KHz, and the pulse width to 40μs during marking;

[0032] Step 4. Fix the scanned part on the worktable, and use the CNC milling machine's own CNC device control system and the laser marking ...

Embodiment 2

[0034] In this embodiment, the anti-counterfeiting pattern is set as Bauhinia, and its laser color marking method is carried out according to the following steps: figure 1 as shown,

[0035] Step 1. According to the color paste film of the anti-counterfeiting pattern Bauhinia, set the thickness of the color paste film to 30 μm per layer, and the arrangement of the color bands from the outside to the inside: colorless, black (AP3029), purple (AP3515), red (AP3503); The marking depth is: 75±5μm at the petal and 105±5μm at the stamen;

[0036] Step 2, using a CNC milling machine to select an angle of 80° between the laser beam and the working surface;

[0037] Step 3. Program the laser operation parameters into the CNC software and laser marking software, set the linear scanning speed to 150mm / s, set the frequency of the laser at the petal to 3kHz, and the pulse width to 80μs, set the frequency at the stamen to 4.5kHz, and the pulse width to 60μs ;

[0038] Step 4. Fix the sca...

Embodiment 3

[0040] The anti-counterfeiting pattern of this embodiment is set as the pattern of three Chinese characters "I love you", and its laser color marking method is carried out according to the following steps: figure 1 as shown,

[0041] Step 1. According to the anti-counterfeiting pattern "I love you", the color film thickness of the pattern of the three Chinese characters is 40 μm per layer, and the color bands are arranged from the surface to the inside as colorless, black (AP3029), purple (AP3515), red (AP3503) . The marking depth is 60±10μm for “I”, 100±10μm for “Love”, and 140±10μm for “You”;

[0042] Step 2, using a CNC milling machine to select an angle of 75° between the laser beam and the working surface;

[0043] Step 3. Program the laser operation parameters into the CNC software and laser marking software to set the linear scanning speed to 100mm / s, set the frequency of the laser to 6KHz with the word "I", and set the pulse width to 70μs, and set the frequency of th...

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Abstract

The invention discloses a laser color marking method for covers of books and printed matters, belonging to the laser processing field. The method comprises the following steps: step one: selecting color, thickness and sort order of each layer of paste film according to the color of an anti-fake pattern; step two: selecting an angle of a laser beam and a working surface by using a numerically controlled milling machine according to a preset anti-fake angle; step three: selecting the laser energy of a laser according to the color of the anti-fake pattern; and step four: marking the anti-fake pattern by using a numerically controlled device control system of the numerically controlled milling machine and laser marking software of the laser. The method provided by the invention has the advantages that the marking is accurate, clear and fast; the marking speed is fast, a workpiece and the paste film on the surface are free from damaging, and the operation is convenient, non-contact, free from pollution and perpetual; according to the method, the size of the marked character is micron dimension, multi-angular and colorful, and the positive contribution is provided for the anti-fake of the product.

Description

technical field [0001] The invention belongs to the field of laser processing, in particular to a laser color marking method for the cover of books and printed matter. technical background [0002] Laser marking is an advanced marking method that integrates laser, electronics, optics, precision machinery and computer technologies. It uses a computer-controlled focused high-energy-density laser beam to partially irradiate the workpiece according to the set trajectory, so that the surface material can be instantly vaporized or chemically reacted to change the color, and the pattern, text, etc. with a certain depth or color are etched. Barcodes, etc., leaving permanent marks and trademarks on the surface of the workpiece. It prints various symbols, characters and patterns, etc., and its character size can range from millimeters to microns, which has special significance for product anti-counterfeiting. However, the traditional marking process has slow marking speed, blurred h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/00B41M3/14
Inventor 李刚胡文全安亚君罗崇辉
Owner LIAONING TECHNICAL UNIVERSITY
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