Laser online marking method and device used for packaging material with film coated on surface

A packaging material and laser technology, applied in the field of laser marking, can solve the problems of film layer breakdown, laser beam cannot penetrate the film layer, direct contact with harmful layers, etc., to achieve clear and beautiful effects, shorten operating procedures, and high efficiency Effect

Pending Publication Date: 2017-09-08
江苏华工激光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For packaging materials coated on the inner surface, when laser marking technology is used for processing, one situation is that there is a problem of breaking down the film layer on the inner surface, and the other situation is that the laser beam cannot penetrate the film layer and will not The problem of film absorption
The former situation w

Method used

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  • Laser online marking method and device used for packaging material with film coated on surface
  • Laser online marking method and device used for packaging material with film coated on surface
  • Laser online marking method and device used for packaging material with film coated on surface

Examples

Experimental program
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Effect test

Example Embodiment

[0044] Example 1: marking dairy product packaging boxes.

[0045] The dairy product packaging box is composed of PE transparent film, PE transparent film, aluminum foil, PE transparent film, cardboard and PE transparent film in sequence from the inside to the outside. In this example, the production date and batch number of each packaging box are marked online on the two-layer PE transparent film on the surface. The steps are as follows:

[0046] 1) The production date and batch number to be marked are transmitted to the industrial computer through the corresponding interface, and the industrial computer imports them into the software of the marking control system;

[0047] 2) Manually shake the hand wheel on the lifting bracket to roughly adjust the lifting bracket so that the focal position of the laser beam after passing through the laser marking head is roughly on the dairy product packaging box coated on the upper surface of the conveying platform;

[0048] 3) The selected laser ...

Example Embodiment

[0053] Example 2: marking food packaging lids.

[0054] The food packaging cover is composed of 3 layers of PET transparent film, paint layer and aluminum plate from the inside to the outside. In this example, the production date and batch number of each piece of food packaging cover can be marked online on the middle paint layer. The steps are as follows:

[0055] 1) The production date and batch number to be marked are transmitted to the industrial computer through the corresponding interface, and the industrial computer imports them into the software of the marking control system;

[0056] 2) Manually shake the hand wheel on the lifting bracket to roughly adjust the lifting bracket so that the focal position of the laser beam after passing through the laser marking head is roughly on the packaging material coated on the upper surface of the conveying platform;

[0057] 3) The selected laser is an ultraviolet laser with a wavelength of 355nm. Input the corresponding instruction on t...

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Abstract

The invention discloses a laser online marking method and device used for a packaging material with a film coated on the surface. The marking method comprises the following steps of: guiding in a to-be-marked pattern into an industrial controller, setting parameters of a laser unit, controlling a laser beam generated by the laser unit to act into a transparent film layer on the inner layer of the packaging material or to pass through the transparent film layer to act to the inner part of a colored layer; and marking the pattern inside the transparent film layer on the inner layer of the packaging material or inside the colored layer, detecting the marked pattern after marking, and eliminating products which are detected to be marked in an unqualified mode. The pattern is marked inside the transparent film layer or the colored layer, so that anti-counterfeit identification codes such as two-dimensional codes and batch number are not worn forever; and moreover, the inner surface of the packaging material is not damaged, the organization layer structure of the original packaging material and sealing properties of the organization layer are not damaged, speed of making the anti-counterfeit identification codes such as two-dimensional codes and batch number is quick, the effects are clear and beautiful, and therefore, the laser online marking method is suitable for various packaging materials with films coated on the surfaces.

Description

technical field [0001] The invention belongs to the technical field of laser marking, and in particular relates to a laser online marking method and device for surface-coated packaging materials. Background technique [0002] With the improvement of modern people's living standards, more and more attention is paid to the health of the human body, especially in the field of fast-moving consumer goods. The inner surface of many packaging materials is covered with a transparent protective film to prevent direct entry into the human mouth. Food, medicine, beverages and dairy products are in direct contact with packaging materials, because the inner surface of uncoated packaging materials usually contains harmful substances such as inks, paints and pigments. [0003] On the other hand, with the rapid development of modern technology, fake and shoddy goods are becoming more and more rampant. Traditional anti-counterfeiting technology is easy to be counterfeited, and laser marking...

Claims

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Application Information

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IPC IPC(8): B23K26/362B23K26/70B41M5/24
CPCB23K26/361B23K26/70B23K26/702B41M5/24
Inventor 王建刚董义徐章地陶然施欣彤
Owner 江苏华工激光科技有限公司
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