Views: 0 Author: HanTenCNC Publish Time: 2021-09-29 Origin: Site
In the application of laser marking, not only for metal laser marking, but also to meet the development needs of a large number of printing on plastic parts. For example, in the previous barcode applications, laser marking of two-dimensional barcodes is more accurate and precise.
Discoloration involves changing the color of a material only below its surface, for example by carbonization. In the engraving method, the surface area of the material is removed by melting and evaporation. The laser bubbling method incorporates gas bubbles into the material to expand it and produce a relief effect. The light will produce diffraction characteristics on the surface of the modified material, which will produce a bright/dark contrast effect. The ablation method is to partially remove the surface material according to the required marking content, leaving a mark with a concave-convex effect.
How to choose the best marking technology for a wide range of applications depends on the special purpose of marking, the type of plastic and the wavelength of the laser light source. The discoloration method is suitable for most thermal plastics. The carbonization method is used to produce a dark marking effect under a bright background. In most cases, a laser with a wavelength of 532 or 355 nanometers is used. The bubbling law is used to produce a bright marking effect on a dark background (usually black), using a laser with a wavelength of 1064 nanometers as the laser source during operation. Engraving method is more suitable for thermosetting and elastic plastics (in most cases, the wavelength of the laser is 1064 nm)
Laser processing technology has been used in some applications to replace inkjet technology (such as printing and inkjet printing), and the situation has changed. At present, the so-called "non-aesthetic" applications, it is estimated that 90% of plastic laser marking marks the production of carbon dioxide laser marking machines, including parts models, manufacturing dates and expiry dates. Laser marking has been successfully used in commercial applications, including graphic and text marking and cutting in clothing accessories, leather, food and beverage packaging, electronic components, handicrafts, glass, stone processing and other fields.
For the marking of a wide range of non-metallic materials, such as paper packaging, plastic products, labels, paper, leather, cloth, glass, ceramics, plastics, wood products, PCB boards, the label is usually printed in black on a transparent or light background Letters and numbers, or pure silver mark on a black background." "Aesthetic" laser marking 10% of the market, in the ink technology, has huge development potential. This is a typical black project with white markings plastic.