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
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[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 ...
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[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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