Laser labelling for any surface
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Different types of laser for laser labelling
Along with the fibre laser, the carbon laser (or CO2 laser for short) is one of the most commonly used lasers for industrial laser labelling. As the CO2 laser is very efficient and cost-effective, it is particularly suitable for laser branding.
CO2 lasers are ideal for the laser engraving of plastics, wood or fruit and vegetables. However, it is also easy to use laser labelling on glass, rubber, cardboard, coated metals and even paper and films. The versatility of the usage options for laser labelling is therefore a given: whether it involves data matrix codes, bar codes, logos or product numbers. these laser engravings are produced simply and easily with the CO2 laser. The CO2 laser can be used for a variety of materials as well as labelling content.
Whether in the automotive sector, medical technology, the pharmaceutical industry or in the field of packaging, laser labelling using the CO2 laser is widespread and popular. From surgical instruments in medical technology to injection moulding parts for the automotive industry or natural branding in the food sector, clean, durable and high-quality labelling is available for marking and traceability.
Most people know that, in simple terms, a laser beam involves focused light. However, how can simple light achieve such high energy density?
LASER is the abbreviation for “light amplification by stimulated emission of radiation”. Ultimately, in the housing of the CO2 laser, light is intensified by the absorption and radiation of energy in the laser, for which an active laser medium is required; in the case of the CO2 laser a CO2 gas mixture.
For the CO2 laser this involves a gas laser. The medium used is gas or a gas mixture, which is activated to create the laser beam. Energy is supplied to the CO2 gas mixture via a voltage discharge, producing light waves which then produce the laser engraving. An opaque mirror and a translucent mirror are placed at both ends of the CO2 laser. The light waves are reflected to and fro between these until they eventually emerge as a laser beam at the translucent mirror.
The CO2 laser has a service life of around 50,000 working hours. This means that laser engraving and laser labelling can be carried out efficiently for more than 10 years. In this period, no expendable materials are required, as is the case with other branding solutions. The quality does not decrease over the years.
Fibre lasers are particularly suitable for laser labelling metal. Due to the high energy density, it is possible to achieve results of superb quality with good production figures compared to CO2 lasers. Furthermore, the fibre laser can be recommended due to its major contrast options for the laser labelling of plastics, ceramics, stainless steel and films.
The versatility of the usage options for laser labelling is therefore a given: whether it involves data matrix codes, bar codes, logos or product numbers. Laser labelling is created straightforwardly, quickly, in the highest quality and with strong contrasts with the fibre laser. Laser labelling also scores points due to the varied material applications as well as the wide range of labelling content available.
LASER is the abbreviation for “light amplification by stimulated emission of radiation”. Ultimately, in the housing of the CO2 laser, light is intensified by the absorption and radiation of energy in the laser, for which an active laser medium is required; in the case of the fibre laser, thin strands of pure glass.
With the fibre laser, this is the active medium around the doped core of a glass fibre. This medium of a glass fibre is activated to create the laser beam. These long, thin strands are roughly the diameter of a human hair.
The laser light is directed by the glass fibre. Due to the length of the fibres a very high intensity laser beam can be produced because, like the CO2 Laser, there are two mirrors at each end of the laser chamber which form a resonator. This creates a controlled laser for laser labelling.
The fibre laser has a service life of up to 100,000 operating hours. This means that laser engraving and laser branding can be carried out effectively for more than 10 years. In this period, no expendable materials are required, as is the case with other branding solutions. The quality does not decrease over the years. Other advantages are the high beam quality of the light produced as well as the great efficiency of the conversion process, which can achieve more than 85% depending on the optical-optical doping.
The fibre laser also demonstrates good cooling as the fibres have a large surface. With the laser labelling of metal there are often challenging conditions which the robust design of the laser withstands well. The very good contrast quality, which far exceeds that of the CO2 laser for laser labelling, is therefore the “icing on the cake” with this innovative labelling solution.
YOUR EXPERT FOR LASER LABELLING AND LASER ENGRAVING
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