Mar 08, 2021
In the cable industry, in order for products to be able to distinguish product brands, product types, meters, etc., there will be various signs on the cables. Most cable manufacturers now use inkjet printers for coding. Ink printing, pollution and high cost of use, ink consumption is huge. It is understood that the cost of ink purchased by a medium-sized company a year can reach 400,000 to 500,000 or even millions. Moreover, with the improvement of industry requirements, ink jet coding can no longer meet industry requirements.
Nowadays, laser marking machines have entered the wire and cable industry. With its outstanding advantages, lasers can meet the clear and durable requirements of the industry and are very popular in the wire and cable industry. At present, the lasers used in cable coding are mainly divided into: carbon dioxide laser marking machine, fiber laser marking machine, and ultraviolet laser marking machine.
Among them, carbon dioxide laser marking machine and fiber laser marking machine form discoloration by burning the surface of the cable, which will damage the surface of the cable and cause smoke.
Ultraviolet laser marking machine has a short wavelength of 355nm, which is a cold laser. It mainly relies on breaking the plastic chemical molecular bonds on the surface of the cable to form discoloration, and does not damage the surface of the cable. And to adapt to a variety of materials, more and more cables will use UV laser marking machines to print codes in the future. Ultraviolet lasers belong to "cold processing" that can break the chemical bonds in materials (especially organic materials) or the surrounding medium, so as to cause the material to undergo non-thermal process damage and realize the color change reaction. This kind of cold processing is of special significance in laser marking processing, because it is not thermal ablation, but cold peeling that does not produce the side effects of "thermal damage" and breaks chemical bonds, so it has no effect on the inner layer and nearby areas of the processed surface. Produce heating or thermal deformation.
At present, in industries such as non-transparent plastic products, flexible film packaging, and cable and pipe materials, UV has good applications due to its good absorption and low thermal damage.